CN203619856U - foldable rollator - Google Patents

Abstract

A foldable rollator comprising two side sections (1 a, 1 b) each comprising a lower longitudinal beam (2 a, 2 b) and holders (3 a, 3 b; 5a, 5 b) mounted thereon with bearings (4 a, 4 b; 6a, 6 b) for at least one front wheel arrangement (7 a, 7 b) and a rear wheel arrangement (8 a, 8 b), a height adjustment profile (19 a, 19 b) with an inserted support rod (9 a, 9 b) or a separate support rod (9 a, 9 b) with a rearwardly extending handle (10 a, 10 b) on the upper end is provided on each longitudinal beam (2 a, 2 b; 32), the two side sections (1 a, 1 b) being connected to each other via a foldable spreader link (11). The height-adjusting profiles (19 a, 19 b) or the individual support rods (9 a, 9 b) are arranged on the lower longitudinal beams (2 a, 2 b) so as to be foldable in the longitudinal direction of the longitudinal beams (2 a, 2 b) and can be brought from an upright position extending upwards into a stacking position extending substantially parallel to the longitudinal beams (2 a, 2 b), the lower end of the individual support rods (9 a, 9 b) or the height-adjusting profiles (19 a, 19 b) being raised from the longitudinal beams (2 a, 2 b).

Description

foldable rollator

technical field

The utility model relates to a walking aid vehicle. the

Background technique

A rollator (wheeled walker) of the same type is known from DE 20 2006 006 621 U1. In this embodiment, the support rods are guided in the sleeves and can be adjusted in height. Each sleeve is firmly fixed on each longitudinal beam of the main vehicle frame and protrudes vertically upwards. Furthermore, the sleeves are supported by a parallel running vertical beam. Each support bar has a P-shaped armrest, the connecting arms of which are designed so that a backrest of flexible material can be fixed thereon. The free arm behind each armrest forms a handle. A brake handle is attached thereto, which is connected via Bowden lines to the brake devices on the associated wheels. The two side parts are connected to each other via a cross link. The cross link comprises two rods which are hinged at the bottom via a transversely extending tube to the longitudinal beam and at the top via connecting rods which are pivotally articulated on the sleeves parallel to the longitudinal axis of the rollator and on each upper part of each arm of the cross link, so that by lifting the cross link, the two side parts automatically move toward each other. The cross link also has holding elements in the form of transverse tubes on the lower side. The seat made of flexible material can be tensioned between the holders. Although the known rollator can be folded sideways through the promotion of the cross-link. There is no further folding possibility for reduction when stacked when not in use. the

A three-wheeled rollator is known from DE 9400356U1, which has two vertical supports which are rotatably mounted on the other vertical support via connecting braces so that they can be assembled together. In the folded-out state of the rollator, the distance between the two vertical supports is maintained via a lockable connection. When this connection is released, the two supports of the rollator can be brought together. the

Utility model document DE201103163U1 describes a four-wheeled rollator in which the two rear wheels are fixed on a long collapsible bar. the

The utility model document DE202007010598U1 describes a rolling assistant in the form of a three-legged stand, which comprises three foldable legs on which rollers are fixed. the

The problem arises with all these devices that they take up space even in the folded state and can therefore be difficult to transport or store at a disadvantage when not in use. the

Utility model content

Proceeding from the prior art described, the object of the present invention is to design a rollator in such a way that it is also collapsible with regard to its height adjustment tube and support rod, so that it provides a particularly small space when not in use. A storage unit that can be carried in the trunk of any car, also in a small car, and can be easily and space-saving stacked in the home area even when not in use. the

The utility model achieves this object through the design of the rollator, according to which the height-adjusting profile with inserted support rods or separate support rods are arranged foldably on the lower longitudinal beams along the longitudinal direction of the respective longitudinal beams and can be removed from the The upwardly extending standing position is brought into the stacking position extending substantially parallel to the longitudinal beams, and the height-adjusting profile with the inserted support rods or the individual support rods are respectively wound by means of at least one The pivotably mounted rear struts of the horizontal axis or the pivotably mounted front struts mounted thereon in the region of the lower end and on the longitudinal beams in the front region are guided and held during deflection, each individually The lower end of the supporting rod or the respective height-adjusting profile is lifted from the longitudinal beam when it is moved from the upwardly extending upright position into the stacked position extending substantially parallel to the longitudinal beam. the

The height adjustment profile can of course be a tube, which is formed round, polygonal or oval. However, the height-adjusting profile can also be a tube profile with a freely defined cross section or another solid profile into which the support rod, which is designed as a hollow rod, can be slipped on or inserted. The height-adjusting profile and the support bars cooperate in a known manner, ie the individual support bars can be raised and lowered relative to the height-adjusting profile and thus brought to different height positions and held there. In the simplest embodiment, a row of holes is provided for this purpose in the support bar and/or in the height adjustment profile, wherein the congruent arrangement of at least one hole in the height adjustment profile and in the support bar is loaded by means of a spring The pins can implement height fixation. This pin can for example be installed on the spring-loaded conversion equal arm that can be manipulated by hand so that the height adjustment can be implemented in the required manner. the

In one variant, the support bar can also be mounted as a separate support bar, ie without height adjustability, on the longitudinal beams of the side parts. In order to be able to fold the height-adjusting profile with the inserted support rod or the separate support rod in the longitudinal direction of the stringer, it is necessary to mount them on the stringer so that they can pivot and move. Since the support rod must be installed in the front half of the stringer for static reasons, the support rod protrudes significantly behind the stringer in length when it is normally swiveled around a swivel hinge, so that although additional Folding possibilities, but compact folding units are still not achieved in the required manner. For this reason, struts are arranged at least behind the support bars, which are not only articulated on the support bars or on the height adjustment profile, but also in the rear region of the longitudinal beams, so that on the one hand support for the use of the rollator can be achieved The almost vertical or vertical erection of the bar and, on the other hand, the support bar or the height-adjusting profile with the support bar can move forward around the radius of movement of the strut during deflection. By correspondingly selecting the length of the struts, it is possible here that the support rod protrudes slightly beyond the longitudinal beam both at the front and at the rear, thereby providing such a shortening of the device in the folded state that in the required manner The required stacking space is reduced to a minimum. In contrast, in the prior art, the lower ends of the support rods are respectively mounted vertically and rigidly on the longitudinal beams, so that folding over is not possible. the

As swivel hinges for the lower rod ends of the cross hinges, for example, holders on the lower ends of height-adjusting profiles or support rods are conceivable, which have bearing points for tubes arranged at a distance from each other, on which the cross joints are welded. The lower end of each rod of the rod. It is obvious that when the support rods are tilted back, the lower bearing points are automatically raised on the longitudinal beams and the support rods together with the height adjustment profile can be moved forwards. In order to secure this joint in the upright position of the rollator, for example fastening clips can be provided which provide a connection between the free end of the support bar or the height-adjusting profile and the brace. the

However, it is also possible that a pin protrudes from the support rod or the holder below, which pin engages in a locking groove on the upper side of the longitudinal beam and is fixed therein by a swivel clip or a shutter, which can be moved in this way via a lever. Deflect or move so that the pin is deflected out when the support rod is flipped down. These measures make it possible, for example, for the height-adjusting profile with inserted support rods or the lower ends of the individual support rods to be releasably deflected into locking recesses on the longitudinal beams when erecting. However, an interlock can also be provided on at least one brace, which prevents unintentional deflection in the upright position of the rollator. In addition, an additional guide and locking can be provided via the front struts which are additionally provided to the existing rear struts, which are dimensioned and shaped in such a way that it is possible to implement the support rod with or without Deliberate parallel support on the longitudinal beams in the case of height adjustment profiles. the

On the holder for the bearing of the front wheel arrangement it is also possible to articulate a lever which has an L-shape and is connected with a free leg to the lower fixing point on the support rod of the cross hinge. It is obvious that when the support rods are folded back, the lower ends of the support rods are automatically pivoted upwards and also forwards, so that a guide is produced in each case when the respective support rods are deflected and erected. In a further embodiment of the invention it can also be provided that the additional strut is hinged to the front end of the side member and is formed as a lever on both sides, so that the wheel bearing holder can be fixed at the projecting end of the lever. It is obvious that in this arrangement the front wheels can also be swiveled downwards and upwards, so that the folded rollator is thus further shortened at the front. the

The cross link formed by the longer rods also has the advantage that a holding rod extending in the longitudinal direction of the rollator can be mounted on the upper ends of the rods, on which a seat can be fixed in a known manner . A backrest can also be fastened on the front side or the rear side on these support rods provided as holding elements. In order to provide a more secure hold on the retaining elements, the support elements can be formed as polygonal tubes, so that the backrest can be inserted with polygonal pins and can be securely fixed, for example, by means of a spring fastening pin which engages in a hole. Such a backrest can be removed at any time, it can be formed as a rigid backrest or can be formed from a flexible material. In case the backrest is made of a flexible material, the backrest can be retained even when folded. This also applies to the seating surface. The seat surface can also consist of a flexible material or can be locked as a shelf-shaped seat with locking devices. the

In a further embodiment, it is provided that the two side parts extend parallel and mirror-symmetrically, and the split link is a cross link, which is composed of at least two cross links and hingedly crossed about the longitudinal axis of the rollator. point interconnected rods, the lower ends of which are pivotably supported on the lower ends of the height-adjusting profiles or on separate support rods, while their upper ends are connected to the lower ends via articulated compensating rods Parts are fastened in a spaced-apart, pivotable manner to the height-adjusting profiles or support rods. the

However, the invention can also be used in an embodiment in which the longitudinal beams can be connected to one another in a V-shape about a vertical axis on the front side or can be connected to one another in an articulated way around at least one vertical axis on a connecting piece on the front side. , wherein at least one front wheel device can be fixed on the connecting piece on the front side. It goes without saying that the individual longitudinal members must be shaped in such a way that the required foot freedom is provided. the

In a further embodiment it is provided that the height-adjusting profile with the inserted support bar or the separate support bar each has an insertion device for inserting the folding shelf. The insertion device can be adapted in such a way that the folding shelf can be inserted at several points on the height-adjusting profile with the inserted support bar or on a separate support bar. the

The folding shelf can be fixed on one side via straps or another suspension device to a handle mounted on a support bar which can be inserted into the height-adjusting profile or set separately, while the other end is fixed on a support bar with an inserted height adjustment profile or on a separate support rod. It goes without saying that straps are provided on both handles. the

In order to increase the availability, upwardly protruding bars are also provided on the front struts, on the lower longitudinal beams before the receptacles and/or on the height adjustment profile with inserted support bars or on separate support bars. Or stand-up stand for pinnable or attachable trays, baskets or seat boards. the

Description of drawings

The invention is explained in more detail below with the aid of exemplary embodiments shown in the various figures. in:

Fig. 1 isometric view of the rollator erected according to the utility model,

Figure 2 Isometric view of the rollator drawn in Figure 1 with its sides folded;

Figure 3 is an isometric view of the rollator according to Figures 1 and 2, also partially folded vertically,

Figure 4 isometric view of the fully folded rollator according to Figures 1 to 3,

Fig. 5 is another perspective view of the rollator according to the utility model in an upright state,

Fig. 6 according to the side folding state of the rollator of Fig. 5 according to the utility model,

Fig. 7 according to the partially folded state of the rollator of Fig. 5 according to the utility model, including the height adjustment profile with the inserted support bar or the separate support bar which is loosened; and

FIG. 8 shows the fully folded state of the rollator according to FIG. 5 according to the invention. the

Detailed ways

The rollator shown in the figures essentially comprises two mirror-symmetrical side parts 1a and 1b. The side parts 1a, 1b each comprise a longitudinal beam 2a or 2b, on which the holders 3a and 3b are mounted on the front side, which in turn have bearings 4a and 4b and front wheel arrangements 7a and 7b. The front wheel arrangement 7a, 7b can be a single wheel, as indicated in the example. However, this can also be a double-wheel arrangement known per se. One-sided prongs or spanning prongs or central struts can be provided as connection elements to the holders 3a and 3b. In the region of the rear, the ends of the longitudinal beams 2a, 2b are bent and run obliquely backwards and downwards. Bearings 6a and 6b are provided on each end of the holders 5a and 5b for the rear wheels 8a and 8b. In this exemplary embodiment, these are rear wheels 8a and 8b which are sheathed on the outside on one side. the

In order to be able to use the rollator as a support vehicle for people with walking disabilities, height adjustment profiles 19 a and 19 b extending vertically upwards in the upright position are provided, in which at least one hole 26 a, 26 b is provided at the upper end. A support rod 9a, 9b is inserted in each case into the tubular height-adjusting profile 19a, 19b. A plurality of holes arranged up and down are arranged in the support rods 9a, 9b, so that one of the holes coincides with the hole 26a or 26b in the height-adjusting profile when it is pulled up. By means of a fastening pin (not shown), for example a spring-loaded pin, it is possible to fix the support rods 9a, 9b at different heights. Before the deflection, the lowermost position should be assumed so that the shaped and sheathed handles 10a and 10b do not protrude appreciably beyond the rear wheels 8a and 8b. Due to the height adjustability, an adaptation of the rollator to the body dimensions of a walking disabled person is possible in a simple manner. the

According to the invention it is now provided that the bearing sleeves 25a and 25b are fastened to the lower ends of the height adjustment profiles 19a and 19b. The bearing bushings 25 a , 25 b are designed such that the round underside can be mounted on the longitudinal beam and thus be supported flatly thereon and provide support not only in the longitudinal direction but also in the lateral direction. Fixing devices can also be provided here. On the inside of these bearings 25a, 25b is formed a bearing seat which accommodates the tubes 24a and 24b so as to be pivotable. The rods 13 and 14 of the cross link 11 joined between the two side parts 1a and 1b are welded centrally on the tubes 24a and 24b. The two rods 13 and 14 are articulated to one another at a point of intersection 12 and have holding elements 17a and 17b at the respective upper ends extending parallel to the longitudinal direction of the rollator. The retaining elements 17a, 17b are likewise tubes which protrude beyond the rods on the front side but also on the rear side. Obviously, on these retaining elements 17a and 17b, for example, a seat shelf can be put on or the seat shelf can be pushed away in the upright state of the cross bar 11 so as to extend laterally. Here too, however, it is also possible to fasten a seat part made of a flexible material which folds automatically when the cross link 11 is folded. the

The upper ends of the rods 13 and 14 are not fixed via the holding elements 17a and 17b, but are provided via connected compensating rods 15 and 16, whose upper ends are supported directly or via a transverse tube in bearing bushes of a holder 20a, 20b. When the two side parts 1 a , 1 b of the rollator are folded together, the two upper sections of the crossbar rods 13 and 14 are deflected upward via these compensating rods 15 , 16 , so that the holding elements 17 a and 17 b can be moved toward each other. On the other hand, the lower rod ends are fastened immovably and pivotably to the height adjustment profiles 19 a and 19 b. the

When the two side parts 1a, 1b are placed against one another, the height-adjusting profiles 19a, 19b can then be deflected in such a way that they stop on the longitudinal beams 2a and 2b. For this purpose, rear struts 18a and 18b are respectively arranged in pairs, which are hinged on the side beams 2a, 2b on the one hand by means of swivel bearings 22a or 22b and on the other hand are hinged to the height adjustment profile by means of swivel bearings 21a and 21b provided. 19a and 19b. The braces 18a and 18b support the height adjustment profiles 19a, 19b as they deflect. At the same time, front struts 23a and 23b, which are laterally hinged on the bearing bushings 25a and 25b, are provided so that when the height-adjusting profiles 19a and 19b are deflected and moved, the height-adjusting profiles are also guided in the front region. Therefore, when folding, which is evident from FIGS. 3 and 4 , no wrong operation can occur, because a positive guide is provided and the lengths of the struts 18a, 18b and 23a and 23b are matched to each other in such a way that their radial movement does not hinder the rotation process. the

It is evident from FIG. 3 that in the inclined position of the height adjustment profiles 19a and 19b there is already a reduced volume of space that the rollator occupies in the folded state. In the final position according to FIG. 4 it forms a small device, when the handles 10a and 10b protrude only slightly from the rear wheels 8a and 8b, and likewise the tubes 24a and 24b protrude only slightly from the front wheels 7a, 7b. Through the measures according to the invention, the rollator can thus be folded into a small storage bag, which can find a place in any suitcase. the

FIG. 5 shows a rollator or a wheeled walker (Rollator) 31 which is used as a mobile assistant. The rollator 31 is used as a pillar when walking and can be equipped with other accessories such as a transport basket or a transport bag, an umbrella or a clamp for a walking crutch to the handicapped or infirm. Braking devices, which act at least on each rear wheel, are not shown for simplicity. However, the rollator can be equipped with fixable brakes for added safety. In a further embodiment, the rollator 31 includes an electric motor for supporting the walking movement and driving the rollator 31 . To this end, sensors can be provided on the handles, which detect in which direction a person is going to drive the rollator. The rollator 31 is usually made of metal tubing and is universally available. The rollator can also be constructed of plastic. the

According to this exemplary embodiment, the rollator 31 comprises a metal frame or metal frame, which has three wheels 38 and 39 on each lower frame part and support rods inserted in the height adjustment profile 35 or on the upper end of a separate support rod There are two handles 44 . The ground contact points of the wheels 38, 39 are arranged in the form of a triangle. Unlike walking crutches or individual lower arm walking supports, these assistants do not have to be lifted from the ground at any time. Wire baskets, seating surfaces, trays, drink holders, crutch holders and backrests are available as accessories. The rollator 31 can be easily folded for transport in a car or in public transport. the

The rollator 31 has two lower side members 32 in the lower region. The lower side members 32 can consist of curved or straight metal tubes with a defined cross-sectional profile or can be produced from a suitable stable plastic. The use of aluminum tubes is particularly advantageous because they have a low weight and can therefore be moved by a person more easily than when steel tubes are used. The tubes of the lower side members 32 can likewise be designed as hollow tubes with a circular or other cross-section. In general, however, the lower longitudinal beams 32 can also have another cross-sectional shape and be made of any desired material, as long as the lower longitudinal beams 32 have sufficient strength to withstand the height adjustment profile 35 together with the inserted Support rod or the force exerted by a separate support rod. the

On the front side of the rollator 31 , the lower longitudinal beams 32 are connected to one another via a connecting piece and hinge 34 , so that the lower longitudinal beams 32 can be folded and in the folded state are substantially parallel. Such a connection to the hinge 34 can be produced, for example, from plastic or metal as a profiled or flat part. The hinge 34 can be formed, for example, from an upper and a lower hinge plate, between which one end of each of the two lower longitudinal beams 32 is mounted rotatably on a vertical axis of rotation. Such an axis of rotation can be formed, for example, by a metal pin which extends between the upper and lower hinge plates. The ends of the respective lower longitudinal beams 32 are provided, for example, with swivel bearings which have an opening through which the rotational axis of the hinge 34 extends. the

Alternatively, the individual lower longitudinal beams 32 can also be connected via a joint 34 to a single axis, about which the two lower longitudinal beams 32 rotate. In this case the lower stringers 32 have a curved shape which enables the lower stringers 32 to be substantially parallel in the folded state. In general, however, any device is conceivable as hinge 34 which is suitable for producing a displaceable swivel connection between the two lower longitudinal beams 32 so that they can be brought together. the

Furthermore, the rollator 31 includes two rear wheel arrangements 38 and a front wheel arrangement 39 . For this purpose, the wheel arrangements 38 and 39 can each be formed by separate freely rotatable wheels mounted on a horizontal axis, such as eg rim wheels comprising a plastic rim. The two rear wheels are fastened to the respective lower side member 32 in such a way that they are not rotatable relative to each other about the vertical axis and retain their orientation. In particular, the orientation of the rear wheels 38 is selected such that they are in a parallel orientation when the rollator 31 is folded out. Rolling off of the sides of the rollator 31 is thus prevented and the stability of the rollator 31 when supporting a person is improved. Optionally, the roller devices 38 and 39 can be provided with freewheeling hubs, so that the rollator 31 can only be moved in the forward direction. This further improves the stability of the rollator 31 during use and prevents the rollator from moving backwards, so that it can be parked, for example, on a slope without rolling down. the

In contrast, the front wheel arrangement 39 , eg a single wheel, is rotatable about its vertical axis in order to increase the maneuverability of the rollator 31 so that the rollator 31 can be turned in different directions. In the embodiment shown, the front wheel arrangement 39 is fastened on the joint 34 so as to be rotatable about a vertical axis. The axle of the front wheel assembly 39 is fixed on both sides of the wheel by a yoke spanning the wheel. In order to ensure very good rolling properties, the wheels may comprise tires of solid rubber or pneumatic tyres. the

However, double wheels can also be used as wheel arrangements 38 , 39 , which consist of two single wheels arranged parallel to one another. In particular, the use of a double wheel mounted rotatably about a vertical axis in the front wheel arrangement 39 is advantageous, since this increases the rolling properties and stability of the rollator. Such a double wheel can, for example, consist of two wheels mounted rotatably about the same vertical axis at a distance of approximately 20 cm. Alternatively, the two single-wheel or double-wheel arrangements can be arranged spaced apart on a bridge which, instead of a separate wheel arrangement, can be plugged on the connection part in a rotationally fixed manner. EP2030864A2 shows an example of this in FIG. 12 . By means of such a two-wheel arrangement including bridges, the same lateral safety against overturning of the rollator is provided on the front side as on the rear side. In the center between the two single wheels, the two-wheel device is connected to the rollator 31 rotatably about a vertical axis. When the rollator 31 is folded, the two wheels can be turned in the direction of the respective folded lower longitudinal beam 32 , so that a particularly compact storage unit of the rollator 31 is provided. the

In order to maintain the distance between the two lower longitudinal beams 32 in the unfolded state, a foldable split link 46 is arranged between the two lower longitudinal beams 32 . The split link 46 consists of two elements mounted rotatably on each lower longitudinal beam 32, which can be locked centrally via a locking device or receptacle 33, so that they establish a gap between the two lower longitudinal beams 32. The connection is rigid and the distance between the individual lower side members 32 relative to each other is maintained by spacers when the rollator 31 is in use. When the rollator 31 is folded, the locking device of the spreader link 46 is released, so that the two arms of the spreader link 46 can be pivoted at their connection points and the distance between the two lower longitudinal beams 32 can be changed. the

Alternatively, however, other devices can also be used here, such as, for example, a one-piece split link 46 which can be inserted into corresponding openings or holes in the respective lower longitudinal beam 32 . Such split links, which can for example consist of aluminum, comprise vertically bent ends which can be inserted into corresponding holes in the respective lower longitudinal beam 32 . In general, however, any device can be used which is suitable for maintaining the distance between the two lower stringers 32 in the unfolded state and which nonetheless enables the individual lower stringers 32 to be brought together. the

In other embodiments of the rollator 31 the split link 46 can also be arranged at other locations, for example between the two front beams 36 and/or between the two height adjustment profiles 35 with inserted support rods. between or between individual support rods 35. the

The two front beams 36 are located at the front of the rollator 31 . Each of the two beams 36 is fastened at its front end to the lower longitudinal beam 32 or to the connecting piece so that it can rotate about a horizontal axis and a vertical axis. Each of the two front beams 36 is rotatably connected at the lower end to a height adjustment profile 35 with inserted support rods or to a separate support rod 35 . Rear beams 37 are arranged on the rear of the rollator 31 . Each rear beam 37 is rotatably connected at one end to the rear end of the lower longitudinal beam 32 . At the other end of the rear beams 37 they are rotatably connected to the height adjustment profile 35 with inserted support rods or to a separate support rod. The respective front and rear beams 36 and 37 may be formed, for example, from metal tubes. The rotatably supported beams 36 and 37 enable the height adjustment profile 35 with the inserted support rod or the separate support rod 35 from a state (in this state the height adjustment profile 35 with the inserted support rod or the separate support Rod 35 is substantially perpendicular to the lower stringer 32 upright) into a folded state, in the latter state with inserted support rod height adjustment profile 35 or separate support rod parallel to the lower stringer 32 lay flat. the

A corresponding rotational connection between the beams 36 and 37, the height-adjusting profile 35 with inserted support rods or separate support rods and the respective lower longitudinal beams 32 can be established, for example, via collars which on the one hand form The U-shape encloses a pipe part with which a rotational connection is to be produced and, on the other hand, within the U-shape there is a rotational axis on which the other pipe can be rotatably mounted. The rotational axis can here be formed, for example, by a screw which at the same time serves for the fastening of the U-shaped insertion collar on one of the tubes. the

Furthermore, on each lower longitudinal beam 32 there is mounted a locking device or a receptacle 33 into which in the upright position a height-adjusting profile 35 with an inserted support rod or one end of a separate support rod respectively engages. . The locking means or the receptacles 33 can be fastened to the lower longitudinal beams 32 , for example via screws. In an embodiment according to the invention, the locking device 33 comprises two side walls, between which a height-adjusting profile 35 with a circular cross-section with inserted support rods or a separate support rod is guided during insertion. the

Furthermore, the locking device or the receptacle 33 comprises a rear wall, which forms a stop when inserted as a height adjustment profile 35 with inserted support rods or as a separate support rod. A locking mechanism prevents the height adjustment profile with the inserted support rod or the separate support rod from sliding out forwards. The locking mechanism can for example consist of a locking pawl provided with a spring, as long as the height adjustment profile 35 with the inserted support rod or a separate support rod is inserted into the locking device or the receptacle 33, as long as the Squeeze the locking pawl downwards while the height adjustment profile or the separate support rod is not yet in its final position. When the height adjustment profile 35 with the inserted support bar or the separate support bar is in its upright final position, the locking pawl mechanism prevents the height adjustment profile with the inserted support bar or the separate support bar from being released from the locking device or Sliding out of the receiving portion 33 forward. In order to release the height-adjusting profile 35 with the inserted support rod or the separate support rod, a release mechanism is provided on each locking device or receptacle 33 , which can be actuated by hand. If the user manipulates the release mechanism, the locking pawl moves downward and the height adjustment profile 35 with the inserted support rod or a separate support rod can be turned forward from the locking device or the receptacle 33. In general, however, other devices are also conceivable as engagement means, in which the respective height-adjusting profile with inserted support rods or the ends of individual support rods can be locked. the

In a particularly advantageous embodiment of the locking device or housing 33 it comprises two side walls and two alignment guides on which a pin 45 slides on its upper edge, which is adjusted from a height with an inserted support rod. profiles or protrude from both sides of a separate support rod. For this purpose, the locking device or the two walls of the receptacle 33 are formed in such a way that they have increasing heights in the insertion direction and pins 45 protrude from the height adjustment profile 35 with the inserted support rod or from a separate support rod. When the rollator 31 is unfolded it slides into a U-shaped groove in each side wall. This achieves the advantage that the height-adjusting profile 35 with the inserted support rod or a separate support rod can be easily inserted into the locking device or the receptacle 33 on the one hand, and on the other hand by the tapering of the two side walls When inserted, the height of the two height-adjusting profiles or the individual support rods exerts a pressure in the vertical direction. This increases the strength of the rollator 31 in the upright position of the height-adjusting profiles 35 or of the individual support bars. the

Furthermore, the rollator 31 comprises two height-adjustment profiles 35 with inserted support rods or individual support rods, which can be formed, for example, from hollow tubes, such as, for example, metal tubes. They are each bent at their ends so that a handle 44 can be fastened thereto. A person using the rollator 31 is supported on the handle 44 . The height-adjusting profiles 35 with one inserted support rod or separate support rods serve here to transmit the supporting force exerted by a person on the rollator 31 to the lower longitudinal beams 32 and the respective wheel arrangements 38 and 39 . Alternatively, however, the height-adjusting profiles with each support rod or the individual support rods can also be formed from straight pipes, on the upper ends of which other pipes can be mounted via elbows or corresponding fastening devices in order to arrange the individual support rods. handle44. the

Furthermore, an insertion device 42 is provided on each height-adjusting profile 35 or on each support rod for one-sided insertion of the folding shelf. The insertion devices 42 can be formed, for example, from a plastic part, which is fastened around the height-adjustment profile or a separate support rod 35 and has a plurality of annular projections at regular intervals. The folding shelf 40 can be inserted between the protrusions at a number of different heights. Each annular protrusion prevents the inserted folding shelf 40 from moving along the height adjustment profile 35 or a separate support rod. In particular, a plurality of recesses can be provided on the folding shelf 40 , which correspond to the shape of the insertion means 42 between the protrusions. the

The folding shelf 40 can be folded in the center and carried by the user of the rollator 31 , for example in a mesh basket of the rollator 31 . The rollator 31 can thus generally be used not only as an aid when walking, but also as a seating device when the user is tired, for example. the

However, instead of a plastic part with a plurality of annular projections as insertion means, other means can also be used. For example, each height-adjusting profile 35 or support bar can be provided with a plurality of holes into which corresponding pins of the folding shelf 40 can be inserted. In particular, this results in the advantage that the folding shelf 40 can be mounted at different heights on the height-adjusting profile 35 with inserted support rods or on separate support rods, so that the sitting position can be well adapted to the user's needs. the

In order to support the seat surface on the other side of the folding shelf 40 , strap lugs 41 are arranged on the folding shelf 40 . The strap rings 41 are hung at their ring ends on the bent ends of the support rods inserted in the height-adjusting profile 35 or of separate support rods, so that a horizontal seating surface is obtained, which passes in front at the respective heights. The adjusting profile or the individual support rods are supported by an insertion device 40 and are supported behind via strap lugs 41 suspended on the respective support rods. For this purpose, the bent ends of the respective support rods have a region in front of the handle 44 , to which the corresponding strap eye 41 is mounted. In order to avoid the slipping of belt type suspension ring 41. An annular flange is provided on each end of the handle portion of each support plate. In order to adapt the sitting position, each strap eye 41 can be provided with a device which allows the length of the strap eye 41 to be varied. This can be done, for example, via a correspondingly movable handle on the respective strap eye 41 . Instead of the strap eye 41 , other suspension means, such as a chain, can also be used. the

The folding shelf 40 has a hinge at the center of the seat so that the folding shelf 40 is foldable. The hinge movably connects the two planes of the folding shelf 40 at one edge. The hinge takes the load of the movable parts and the force of the rotational movement and acts as a bearing with one degree of freedom. This results in the advantage that the space-consuming folding shelf 40 can be reduced in size and can be easily carried by the user of the rollator. In particular, the folding shelf should be produced from a material that is lightweight but nevertheless has a high strength, for example consisting of plastic or a material reinforced with carbon fibers or glass fibers. the

Furthermore, in order to improve the seating quality, a backrest 43 can be mounted between two height-adjusting profiles 35 with inserted support rods or between individual support rods. The backrest 43 extends forward between two laterally arranged height-adjustment profiles 35 or between support bars and serves as a back support for a person sitting on the folding shelf. For this purpose, the backrest 43 can consist of an elastic material, for example a bendable plastic strip, the ends of which are fastened to the height-adjusting profiles 35 or to the support rods. Leather or fabric straps can also be used. This results in the advantage that the rollator 31 can be folded despite the use of the backrest 43 . the

In a further embodiment of the backrest 43 , the backrest is made of a solid material, such as for example plastic or aluminum, and can be slipped or clamped to the corresponding height on the two height-adjusting profiles 35 or on the respective support rods. For this purpose, the backrest 43 comprises clamping devices at both ends, which are adapted to the shape of the height adjustment profiles or support bars and which enable the backrest 43 to be attached to the support beams. This results in the advantage that the backrest 43 additionally serves to increase the stability of the rollator 31 . the

FIG. 6 shows the folded state of the lower longitudinal beams 32 of the rollator 31 according to the invention. To this end, the locking device of the spacer or spreader link 46 is released and the two arms are moved towards each other. Folding eliminates the parallel arrangement of the rear wheels 38 in the unfolded state of the rollator 31 . In this state, the height-adjusting profiles or the support rods can be folded and lifted from the longitudinal beams 32 by actuating the unlocking device. the

FIG. 7 shows a state of the rollator 31 according to the invention, in which the height adjustment profiles 35 or the support rods are deflected out of the locking devices 33 . When the rollator 31 is folded, the height adjustment profiles 35 with the inserted support bars or the individual support bars are guided by the front beams 36 and the rear beams 37 and are brought into a position parallel to the lower longitudinal beams 32 . The point of rotation of each rear beam 37 on the corresponding height adjustment profile 35 or the corresponding support bar is below the point of rotation of each front beam 36 on the height adjustment profile 35 or support bar, so that the height adjustment profile 35 or a separate support The bar is turned in the direction of each rear wheel 38 . the

In another embodiment, the pivot point of each rear beam 37 on the height adjustment profile 35 or the support bar is above the pivot point of each front beam 36 on the height adjustment profile 35 or support bar, so that the direction of the front wheel 39 can be adjusted. Flip over the height adjustment profile 35 or the support rod. In this case, instead, the locking device or the receptacle 33 is provided. the

FIG. 8 shows the fully folded state of the rollator 31 according to the invention. In this state, the front beams 36 , the height-adjusting profiles 35 or the individual support bars and the rear beams 37 lie substantially parallel to the lower longitudinal beams 32 . In this state the rollator 31 is in its most compact shape and can be easily transported. the

All illustrated embodiments and features can be combined with one another in a suitable manner in order to achieve the advantageous effects of the invention. the

List of reference signs

1a, 1b side part

2a, 2b stringer

3a, 3b Holder

4a, 4b Bearings

5a, 5b Holder

6a, 6b Bearings

7a, 7b front wheel device

8a, 8b rear wheel device

9a, 9b support rod

10a, 10b handle

11 cross link

12 intersection point

13 pole

14 pole

15 Compensation rod

16 Compensation rod

17a, 17b holding element

18a, 18b Diagonal bracing

19a, 19b height adjustment profiles

20a, 20b Holder

21a, 21b slewing bearing

22a, 22b slewing bearing

23a, 23b front diagonal brace

24a, 24b tube

25a, 25b bearing sleeve

26a, 26b holes

31 Roller

32 lower stringer

33 Accommodating part

34 hinge

35 Height adjustment profile / support rod

36 front beam

37 rear beam

38 rear wheel device

39 front wheel device

40 folding shelf

41 belt / strap ring

42 Insertion device

43 backrest

44 handle

45 pin

46 Split connecting rod

Claims (15)

1. A rollator comprising two side parts (1a, 1b, 35) each comprising: a lower longitudinal beam (2a, 2b; 32) and a retainer mounted on the lower longitudinal beam (3a, 3b; 5a, 5b), these holders have bearings (4a, 4b; 6a, 6b) for at least one front wheel arrangement (7a, 7b; 39) and rear wheel arrangement (8a, 8b; 38) ; and a height adjustment profile (19a, 19b; 35) or a separate support bar (9a, 9b) mounted on the stringer (2a, 2b; 32) with an inserted support bar (9a, 9b), supporting The rod has a rearwardly extending handle (10a, 10b; 44) on the upper end, and the two side parts (1a, 1b) are connected to each other via a foldable forked link (11; 46) with an insert The height adjustment profiles (19a, 19b; 35) of the support bars (9a, 9b) or the individual support bars (9a, 9b) are foldably arranged in the lower part along the longitudinal direction of the respective longitudinal beams (2a, 2b; 32) on the stringers (2a, 2b; 32) and can be placed into a stowed position extending substantially parallel to the stringers (2a, 2b; 32) from an upright position extending upwards, and Height adjustment profiles ( 19a , 19b ; 35 ) with inserted support bars ( 9a , 9b ) or individual support bars ( 9a , 9b ) respectively by means of at least one longitudinal beam ( 2a , 2b ; 32) On the rear splints (18a, 18b; 37), which are mounted so as to be pivotable about a horizontal axis, or on them in the region of the lower end and on the longitudinal beams (2a, 2b; 32) in the region of the front The kinematically mounted front struts (23a, 23b; 36) are guided and held during deflection, the lower ends of the individual support rods (9a, 9b) or of the height adjustment profiles (19a, 19b, 32) When the extended upright position is placed into the stacked position extending substantially parallel to the longitudinal beams (2a, 2b; 32), the lower end is lifted from the longitudinal beams (2a, 2b; 32), The rear diagonal brace (18a, 18b; 37) and the front diagonal brace (23a, 23b; 36) are set, and the front diagonal brace (23a, 23b; 36) is a double-sided lever, and the free front end of the front diagonal brace is used for The holders (3a, 3b) of the bearings (4a, 4b) of the front wheel unit (7a, 7b; 39) cooperate and the front struts are adjusted in each height profile (19a, 19b; 35) or each individual support bar ( 9a, 9b) are deflected rearwardly and in the direction of the respective longitudinal beams (2a, 2b; 32) when transferred from an upwardly extending erect position to a stowed position extending substantially parallel to the respective longitudinal beams (2a, 2b; 32). the 2. Roller according to claim 1, characterized in that a plurality of bearings on the height adjustment profile (19a, 19b; 35) with inserted support rods or on separate support rods are arranged at a distance from one another . the 3. The rollator as claimed in claim 1, characterized in that below the height adjustment profile (19a, 19b; 35) with inserted support bars (9a, 9b) or the individual support bars (9a, 9b) When erecting, the ends are releasably deflected into receptacles ( 33 ) on the respective stringers ( 2 a , 2 b ; 32 ) and/or in at least one brace ( 18 a , 18 b ; 23 a , 23 b ; 36 , 37) An interlock is provided which prevents unintentional deflection in the upright state of the rollator. the 4. The rollator according to claim 1, characterized in that the two side parts (1a, 1b) are designed to run parallel and mirror-symmetrically and are displaceable relative to each other by means of a split linkage (11), or The longitudinal beams ( 32 ) can be connected to one another at the front in a V-shaped spread about a vertical axis or can be hinged about at least one vertical axis at a front connecting piece, wherein the front connecting piece can be fastened At least one front wheel assembly (39). the 5 . The rollator according to claim 4 , characterized in that the split link ( 11 ) is a cross link made of at least two crossed arms around the longitudinal axis of the rollator at the point of intersection ( 12 ). ) are formed by articulated interconnected rods (13, 14), the lower ends of which are pivotably supported on the lower ends of the height-adjusting profiles (19a, 19b) or on separate support rods (9a, 9b) , and the upper ends of these rods are pivotably fixed to the height adjustment profiles (19a, 19b) or support rods (9a, 9b) via hingedly fixed compensating rods (15, 16) at a distance from the lower end section. the 6. The rollator as claimed in claim 5, characterized in that the upper ends of the individual bars (13, 14) of the cross link (11) have holders extending in the longitudinal direction of the rollator for mounting seat inserts Elements (17a, 17b), or seat inserts, are removably or fixedly mounted on height adjustment profiles (19a, 19b; 35) or on separate support bars (9a, 9b). the 7. The rollator as claimed in claim 6, characterized in that the rollator comprises an upwardly foldable folding shelf (40) as seat insert, which can be locked on the holding element (17a, 17b) or can be pivoted fixed on the holding element. the 8. The rollator according to claim 6, characterized in that a seat fabric or another seat made of flexible material is stretched between the holding elements (17a, 17b) as the seat. the 9. The rollator as claimed in claim 6, characterized in that the holding element (17a, 19b) or the height adjustment profile (19a, 19b; 35) or the support bar (9a, 9b) is in front A backrest can be attached to the side and/or at the rear. the 10. The rollator according to claim 4, characterized in that the height adjustment profile (35) with each inserted support bar or the individual support bars each comprise an insert for inserting the folding shelf (40) device (42). the 11. Roller according to claim 10, characterized in that the insertion device (42) is adapted in such a way that it is possible to adjust the height adjustment profile (35) with the inserted support rod or a separate support rod at several positions Insert folding shelf (40). the 12. The rollator as claimed in claim 5, 10 or 11, characterized in that the folding shelf (40) is fastened on one side to the handle on the support pole via straps (41) or another suspension means, and the folding The other side of the shelf (40) is fastened to a height adjustment profile (35) with inserted support rods or to a separate support rod. the 13. Roller according to claim 1, 2 or 3, characterized in that on the front struts (36), on the lower longitudinal beams (2a, 2b; 32) in front of the receptacle (33) and / or on the height-adjusting profile (19a, 19b; 35) with inserted support rods or on separate support rods (9a, 9b) to provide upwardly protruding or upwardly standing supports for attachable or attachable trays, baskets or seat boards. the 14. The rollator according to claim 1, characterized in that a platform can be attached to the lower longitudinal beam (2a, 2b; 32) upstream of the receptacle (33), which can be used as a load platform or as a foot support. the 15. The rollator according to claim 13, characterized in that a platform can be attached to the lower longitudinal beam (2a, 2b; 32) upstream of the receptacle (33), which can be used as a load platform or as a foot support. the

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