JP3692266B2 - wheelchair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheelchair used mainly by elderly people, sick people, and disabled people when moving.
[0002]
[Prior art]
Wheelchairs are widely used as a means of moving elderly people with disabilities, sick people, and disabled people. Recently, wheelchairs have a wide variety of configurations, such as those equipped with a reclining function or those that are electrically powered. Things exist.
[0003]
[Problems to be solved by the invention]
However, although the wheelchair as described above can be used comfortably as a means for moving a care recipient, when a care recipient is placed on this wheelchair or when the care recipient is taken down from the wheelchair, multiple caregivers are required. However, most of the conventional wheelchairs were designed only as a means of transportation. In Japan, there is an urgent need for a wheelchair that does not place a heavy burden on caregivers.
[0004]
An object of the present invention is to provide a wheelchair in which a care recipient does not place a heavy burden on the caregiver when getting on and off the wheelchair.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 of the present invention is provided with a transport means for a care recipient between the seat forming frame and the armrest, and the transport means is a seat forming frame. A first arm that is fixed to the first arm, a second arm that is pivotally supported on the upper end side of the first arm, and a rotation device for the second arm. The first arm is inclined forward from the fixed position to the seat portion. The second arm is characterized in that it can be reciprocally rotated between a fixed position on the seat side and a front position of the seat by a rotating device while keeping the armrest horizontal.
[0006]
Here, the fixed position is a position where the left and right armrests are positioned on the left and right of the seat, and a care recipient sitting on the seat can put the elbow on the other hand. For example, it is a position where the user can sit on a toilet or a bed. Further, the rotation device is a drive mechanism that rotates the conveying means back and forth, and specifically includes a mechanism in which an endless chain is hung on a gear and the rotation is transmitted to each gear to bend and extend the arm.
[0007]
When formed in this manner, the care recipient who is sitting on the seat of the wheelchair gradually rises up as the body supported by the armrests gradually rises as the left and right armrests rise, and then takes the standing posture. The body of the care recipient is gradually moved to the front lower side of the wheelchair with the movement of the armrest by turning the armrest downward and turning again to the opposite side of the seat, and finally In addition, a care recipient can be seated on an object such as a toilet or bed in front of the wheelchair. Then, in order for the care recipient who is sitting on the object to sit down on the seat of the wheelchair again, by supporting the body on the armrest, the armrest moves from the final position where the object is located to the rotation start position of the armrest. Therefore, the care recipient can sit on the wheelchair seat without any problem.
[0008]
According to a second aspect of the present invention, the rotating device includes an arm rotation shaft continuous between the fixed sides of the left and right first arms, a drive transmission gear and a worm gear attached to the first arm, A driven gear fixed to the upper end side of one arm, a fixed gear fixed to the shaft support side of the second arm, a free rotating gear provided on the tip side, and a worm shaft meshing with the worm gear, The first endless chain spans the transmission gear and the driven gear, while the second endless chain spans the fixed gear and the free rotation gear. The first endless chain that rotates by the worm shaft has the second arm on the seat side. And the second endless chain is characterized in that the armrest is kept horizontal without being influenced by the rotation of the second arm.
[0009]
Here, the driven gear and the fixed gear are on the same axis in terms of the structure that supports the first arm and the second arm, but there is a rotating coupling between the gears, and they are coaxial. Although it is, it has a structure that does not restrict each other's rotation. The endless chain may be a timing belt, for example, and is not particularly limited as long as it can transmit the rotational force from the worm shaft to the gear without any trouble.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
One embodiment of the wheelchair of the present invention will be described below with reference to FIGS. 1 to 5.
First, the basic structure of the wheelchair will be described. As shown in FIGS. 1 and 2, the seat portion forming frame 1 includes a wheel shaft 23 on the lower side of the seat 24, and main wheels on the left and right sides of the wheel shaft 23. 8 and 8 are rotatably supported, and armrests 5 are provided on the left and right sides of the seat 24, respectively. Further, the wheelchair according to the present invention is provided with a transport means 13 for the care recipient between the seat forming frame 1 and the armrest 5, and the transport means 13 is configured to form each armrest 5,5. The first arm 3 fixed to the frame 1 and the second arm 4 pivotally supported on the upper end side of the first arm 3 are attached to the second arm 4 so that the height can be adjusted. Is pivoted back and forth around the upper end side of the first arm 3 in parallel with the first arm 3 by the pivoting device 2 and supported by each armrest 5 attached to the second arm 4 The person is conveyed from the seat 24 toward the object on the front side of the seat forming frame 1.
[0011]
Further, the conveying means 13 maintains an angle at which the first arm 3 is inclined forward and upward from the seat forming frame 1, and one end side of the first arm is fixed by a fastener or welding. The first arm 3 is provided with an inclination when the armrest 5 is rotated and the care recipient is in a standing state with a certain distance between the leg of the care recipient and the seat 24. It is kept, the feet are always stable, and the care recipient can be safely transported toward the object.
[0012]
Next, the rotation device 2 of the conveying means 13 will be described in detail based on FIG. 3 and FIG.
An adjustment handle 7 is provided on the back portion of the seat forming frame 1, and the adjustment handle 7 is provided with a worm shaft 10 extending toward the front side of the seat forming frame 1. Reference numeral 10 denotes a shaft that rotates in conjunction with the rotation of the adjustment handle 7. On the other hand, on the lower side of each support arm 2, 2, an arm rotation shaft 11 is provided in a state of being freely rotatable across the left and right first arms 3, 3. A worm gear 16 that meshes with the worm shaft 10 is provided. Further, drive transmission gears 12 that rotate together with the arm rotation shaft 11 are attached to both ends in the longitudinal direction of the arm rotation shaft 11, respectively, while driven gears are provided on the base end side of each second arm 4. 14 are attached so as not to rotate. Then, by multiplying the drive transmission gear 12 and the driven gear 14 by the first endless chain 17, the second arm 4 moves the upper end side of the first arm 3 when the adjustment handle 7 is rotated. With the center, it rotates back and forth in parallel with the first arm 3.
[0013]
If this is the case, the armrest 5 cannot always move in a horizontal state corresponding to the rotation of the second arm 4, so that the fixed gear 19 is attached to the front end side of the first arm 3 so as not to rotate. Although the fixed gear 19 is mounted on the same axis as the driven gear 14, the fixed gear 19 is connected to each other via a rotating connector 21. The driven gear 14 and the fixed gear 19 are The mounting structure does not restrict the movement of each other. On the other hand, a free rotating gear 15 is rotatably attached to the distal end side of the second arm 4 and is further fixed to the attaching portion 6 of the armrest 5 so as to be adjustable in height. .
From this, by multiplying the second endless chain 18 on the fixed gear 19 and the free rotating gear 15, the interval between the respective engaging positions of the second endless chain 18, the fixed gear 19 and the free rotating gear 15. However, since the position relationship is always maintained without being influenced by the rotation of the second arm 4, the armrest can be used regardless of the angular position of the second arm 4 from the upper end side of the first arm 3. 5 always remains in a fixed posture, and the arm rotation shaft 11 moves the left and right armrests 5 simultaneously to the object on the front side of the wheelchair with the rotation of the worm shaft 10 while always keeping the level. . Further, since the rotating device 2 has a meshing structure between the worm shaft 10 and the worm gear 16, when the care recipient places his / her own weight on the armrest 5, the armrest 5 may be rapidly lowered. Absent.
[0014]
The armrest 5 has a substantially T-shape formed by a support portion 25 and a mounting portion 6 to the support arm 2, and the support portion 25 is formed substantially horizontally on the top side, It is possible to hold the elbow or the armpit stably. On the other hand, the attachment portion 6 extends downward from the lower portion of the support portion 25, and the attachment portion 6 is spaced apart vertically. A plurality of adjustment holes 22 are provided, and the insertion pins 20 are inserted into any of the adjustment holes 22 to be fixed to the free rotating gear 15, and are inserted into the adjustment holes 22. By sequentially changing the height, it is possible to adjust the height of the armrest 5 in multiple stages according to the height of the care recipient.
[0015]
When formed as described above, when the care recipient is sitting on the wheelchair seat 24, the care recipient sandwiches the left and right armrests 5 as shown in FIG. By turning the adjustment handle 7 installed on the back side of the seat forming frame 1, the support portion 25 of the armrest 5 is circular and obliquely forward while maintaining a certain posture while the mounting portion 6 is kept vertical. Ascending in an arc shape, the body of the care recipient is lifted with the movement of the armrest 5 and becomes a posture standing up from the floor surface. As shown in the figure, the patient is in a standing posture and rotated 180 degrees to change the direction. The care recipient again holds the armrest 5 to the side, and the caregiver turns the adjustment handle 7 to change the care recipient. While being supported, the armrest 5 gradually descends in a circular arc toward the front side, It is set up a caregiver in a wheelchair the front side, for example, can make sitting on the purpose of the location, such as a toilet or bed.
[0016]
In the present embodiment, the endless chains 17 and 18 are respectively used to rotate the conveying means 13, but for example, a timing belt or the like may be used. As long as it is possible to act, the means for transmitting the drive is not particularly limited. Furthermore, since the support portion 25 of the armrest 5 sandwiches the side of the care recipient, it is desirable that the armrest 5 be formed of a soft material having a cushioning property in consideration of the fit to the body.
[0017]
【The invention's effect】
According to the present invention, the armrest arranged in the wheelchair moves to the front side of the wheelchair by the conveying means, or on the contrary, moves to the seat side. The object can be easily moved to the object on the front side of the vehicle, and it is easy to make the object sit on the wheelchair seat again, so that a large burden is not imposed on the caregiver.
[Brief description of the drawings]
FIG. 1 is a rear view of a wheelchair according to the present invention.
2 is a cross-sectional view of the wheelchair of FIG. 1 taken along the line AA.
FIG. 3 is an explanatory view showing a conveying means of the present invention.
FIG. 4 is an explanatory view showing a conveying means of the present invention.
FIGS. 5A and 5B are explanatory views showing the use of the wheelchair of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat part formation frame 2 Rotating device 3 1st arm 4 2nd arm 5 Armrest 10 Worm shaft 11 Arm rotating shaft 12 Drive transmission gear 13 Conveying means 14 Driven gear 15 Free rotating gear 16 Worm gear 17 First endless chain 18 First 2 Endless chain 19 Fixed gear 24 Sheet

Claims (2)

Between the seat forming frame (1) and the armrest (5), there is a transport means (13) for a care recipient, and the transport means (13) is a first fixed to the seat forming frame (1). An arm (3), a second arm (4) pivotally supported on the upper end side of the first arm (3), and a rotating device (2) for the second arm (4),
The first arm (3) tilts forward from the seat (24) on which a care recipient sits from a fixed position, and the second arm (4) is rotated by the rotating device (2) while keeping the armrest (5) horizontal. A wheelchair characterized in that it can reciprocate between a fixed position on the seat (24) side and a front position of the seat (24). The rotating device (2) includes an arm rotation shaft (11) continuous between the fixed sides of the left and right first arms (3), a drive transmission gear (12) and a worm gear attached to the first arm (3). 16), a driven gear (14) fixed to the upper end side of the first arm (3), a fixed gear (19) fixed to the shaft support side of the second arm (4), and a free gear provided on the tip side A rotating gear (15) and a worm shaft (10) meshing with the worm gear (16);
A first endless chain (17) is hung on the drive transmission gear (12) and a driven gear (14), while a second endless chain (18) is hung on the fixed gear (19) and the free rotating gear (15). Hand over,
The first endless chain (17) rotated by the worm shaft (10) reciprocally rotates the second arm (4) between a fixed position on the seat (24) side and a front position of the seat (24), The wheelchair according to claim 1, characterized in that the second endless chain (18) keeps the armrest (5) horizontal without being influenced by the rotation of the second arm (4).

Images