JP2022125596A - Load carriage - Google Patents

Abstract

An object of the present invention is to provide a luggage carrier in consideration of improving the safety of the truck on which luggage is loaded. A universal wheel rotation control mechanism (10) includes a retainer fixed to a base frame (2), and a universal wheel (4) projecting in a direction orthogonal to a turning axis of the universal wheel (4) and rotating in a vertical direction within a turning range of the universal wheel (4). It is composed of a freely attached universal wheel rotation control rod 12 and a loading platform contact rod 13 that protrudes in the direction of the load receiving support portion 71 of the loading platform 7 and is attached rotatably in the vertical direction. When the rod 13 descends downward, the swivel wheel rotation control rod 12 is lifted upward in conjunction therewith, and the rotation control of the swivel wheel 4 is automatically released, and the rotation control of the swivel wheel 4 is released by the releasing means. [Selection drawing] Fig. 1

Description

There is an application for exception to loss of novelty

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo carrier for the purpose of improving the safety of a vehicle that travels with cargo on it by controlling a part of the movement of the carrier.

A general trolley with a lifting function can carry a load while it is placed on the table or fork of the trolley. However, if the cart is lifted high while it is traveling, it is not safe, and not only can the cargo fall, but the cart may overturn, leading to a serious accident. On the other hand, if the brake is applied automatically, the power to apply the brake is required, and operability is impaired. Therefore, it is assumed that the load will slide down from the table portion of the trolley or the like.

As a prior art related to universal wheel control for the purpose of versatility, operability, stability, etc., for example, the invention described in Japanese Patent Application Laid-Open No. 2014-205431 (Patent Document 1) is the direction of a universal wheel with excellent versatility. An object of the present invention is to provide a control device for a "swivel wheel" comprising a base portion that can be freely attached to a swivel wheel, and a restricting portion that is rotatably provided on the base portion and that restricts the rotating motion of the swivel wheel. A directional control device” is disclosed.

In addition, the invention described in Japanese Patent Application Laid-Open No. 2003-54209 (Patent Document 2) aims to make it very easy to operate by making it possible to remotely operate the operation lever from the steering wheel of various trucks. A "caster with a rotation restricting mechanism" is disclosed, in which the lower end of the caster is connected to one end of a locking member that is pivotally mounted, and is locked in a locking groove provided in a fixing plate at the bottom of the support shaft.

In addition, in the invention described in Japanese Utility Model Laid-Open No. 06-63469 (Patent Document 3), an operation pin that penetrates the substrate and moves up and down in a range that overlaps with the substrate when the top plate is tilted is attached so as to freely appear and retract. A "cart" is disclosed in which an operation lever of a rotation restricting caster installed on the lower surface of the substrate is positioned below the pin.

Further, the invention described in Japanese Patent Application Laid-Open No. 2005-162182 (Patent Document 4) aims to provide straight running stability and to enable easy turning and straight running. A state "caster swivel control" is disclosed.

In addition, the invention described in Japanese Patent Application Laid-Open No. 2001-213325 (Patent Document 5) aims to prevent the swivel casters from swiveling when necessary with a simple structure. is moved forward, the lock pin faces the through hole, and the force of the abutment member engages the lock pin in the through hole.

JP 2014-205431 A JP-A-2003-54209 Japanese Utility Model Laid-Open No. 06-63469 JP 2005-162182 A JP-A-2001-213325

Therefore, the present invention has been devised by the inventor of the present application after extensive studies. It can be attached to an existing truck, and by controlling a part of the movement of the truck, the operator's attention is called. It is an object of the present invention to provide a luggage carrier that takes into consideration the improvement of the safety of a truck that travels with luggage on it, focusing on its mechanism.

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a pair of universal wheels provided on the rear end side of the base frame, and a cargo bed having a lifting function supported by the support frame and moved. and a universal wheel rotation control mechanism attachable to the cargo transport vehicle, wherein the universal wheel rotation control mechanism comprises a retainer fixed to the base frame and a pivot shaft of the universal wheel a universal wheel rotation control rod projecting in a direction perpendicular to the universal wheel and mounted so as to be rotatable in the vertical direction within the swiveling range of the universal wheel; In the retainer, the pawl portion of the pawl portion of the pawl contact rod and the pawl receiving portion of the swivel wheel rotation control rod are arranged side by side so as to mesh with each other. The rods are rotatably connected integrally by a shaft, and when the tip of the loading platform contact rod moves downward from the horizontal state when the loading platform is lowered, the tip of the universal wheel rotation control rod moves horizontally. The swivel wheel is lifted upward from the state to automatically release the rotation control of the swivel wheel in the turning direction, and the swiveling direction rotation control of the swivel wheel is released by the releasing means operated by the operator.

Further, according to the second aspect of the invention, the release means according to the first aspect, which is operated by the operator, moves the distal end portion of the free wheel rotation control rod horizontally by operating an operation lever provided on the support frame. It is characterized in that the rotation control in the turning direction of the free wheel is released by lifting it upward from the state.

Further, according to the invention of claim 3, a vertical guide rod is provided on the front side of the support frame according to claim 1 or claim 2, and the height position of the cargo bed that ascends and descends on the guide rod is provided. It is characterized in that a positioning stopper that determines is attached.

As described above, the cargo carrier according to the present invention is provided with the universal wheel rotation control mechanism that can be attached to the cargo carrier, so that the mechanism composed of the retainer, the universal wheel rotation control rod, and the carrier contact rod is formed. It is simple, does not require additional power to control the rotation of the swivel wheel, and does not impose restrictions on the traveling motion, while arousing the attention of the operator and improving the safety of the cart that travels with loads on it. can be improved.

Front view showing an example of a luggage carrier according to the present invention A plan view showing an example of the luggage carrier of FIG. The right side view which shows an example of the luggage carrier of FIG. (a) front view, (b) plan view, (c) left side view showing an example of a universal wheel rotation control mechanism Explanatory drawing showing mechanism of universal wheel rotation control mechanism (a) control state, (b) automatic release state, (c) manual release state Front view showing an example of releasing means Front view showing another example of releasing means Front view showing an example of positioning means Explanatory diagrams (1) to (3) showing the state of use of the luggage carrier according to the present invention Explanatory diagrams (4) to (6) showing the state of use of the luggage carrier according to the present invention

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that each configuration of the luggage carrier of the present invention is not limited to the following examples, and can be changed as appropriate according to usage conditions.

FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a right side view showing an example of a luggage carrier according to the present invention.
As shown in FIGS. 1 to 3, the luggage carrier 1 is composed of a pair of left and right base frames 2 arranged at regular intervals, and a pair of support frames 5 erected on the base frames 2. and a carrier 7 to be supported. The loading platform 7 is composed of a load receiving support portion 71 that is connected by the elevating mechanism 6 and moves up and down, and a load receiving portion 72 on which a load is placed.

The cargo carrier 1 also includes a pair of front wheels 3 connected to the front end side of the base frame 2 and a pair of rear wheels (swivel wheels) 4 connected to the rear end side of the base frame 2. . The rear wheel (swivel wheel) 4 is connected via a bearing to the lower surface of a connecting plate attached to the rear end of the base frame 2, and the turning shaft 41 of the rear wheel (swivel wheel) 4 is independent. The cargo carrier 1 can be turned 360 degrees in a horizontal plane, and the cargo carrier 1 can be moved in any direction.

Further, as shown in FIGS. 1 to 3, the luggage carrier 1 includes a universal wheel rotation control mechanism 10 that controls the rotation of the rear wheels (universal wheel) 4 in the turning direction. This universal wheel rotation control mechanism 10 comprises a retainer 11, a universal wheel rotation control rod 12, and a bed contact rod 13, as shown in FIG. Although the swivel wheel rotation control mechanism 10 can be controlled even if it is attached to the rear wheel (swivel wheel) 4 on only one side, it is safer to attach it to the rear wheels (swivel wheel) 4 on both sides. do.

The retainer 11 is attached to the base frame 2 adjacent to the rear wheel (swivel wheel) 4 . Also, as shown in FIG. 4, the position of each hole (not shown) is determined in a state in which the loading platform contact rod 13 is first inserted into the retainer 11 and then the free wheel rotation control rod 12 is inserted and arranged side by side. Together, the shaft 112 is inserted to integrally connect them so as to be rotatable in the vertical direction. The retainer 11 also includes a receiving portion 111 that contacts the bottom surfaces of the free wheel rotation control rod 12 and the bed contact rod 13 .

As shown in FIGS. 1 to 4, the swivel wheel rotation control rod 12 protrudes in a direction orthogonal to a swivel axis 41 in the turning direction of the rear wheel (swivel wheel) 4 and controls the turning range of the rear wheel (swivel wheel) 4. A rod-shaped body 121 mounted rotatably in the vertical direction, a rotary base 122 into which one end of the rod-shaped body 121 is inserted and connected to the shaft 112, and a claw receiver for receiving the claw portion 133 of the bed contact rod 13. a portion 123;

As shown in FIGS. 1 to 4, the loading platform contact rod 13 includes a rod-shaped body 131 that protrudes in the direction of the load receiving support portion 71 of the loading platform 7 when it is lowered and is attached so as to be rotatable in the vertical direction. 131 is inserted into and connected to the shaft 112;

There are no particular restrictions on the shapes of the rod-shaped body 121 of the universal wheel rotation control rod 12 and the rod-shaped body 131 of the bed contact rod 13 described above, but the universal wheel rotation control rod 12 A cylindrical shape is preferable so that it can be operated without being caught by projections on the side surface, and a smooth shape (round bar, flat plate, etc.) is preferable for the loading platform contact rod 13 because it contacts and rubs against a part of the loading platform. In addition, the weight of the swivel wheel rotation control rod 12 is set to be heavier than the weight of the bed contact rod 13 so that the swivel wheel rotation control rod 12 does not spring up due to the weight of the bed contact rod 13 . The length of the rod-shaped body 121 of the universal wheel rotation control rod 12 is set to be longer than the turning shaft 41 of the rear wheel (swivel wheel) 4 and longer than the wheel rotation axis. The mounting height of 121 is preferably set to a height close to the wheel rotation axis of the rear wheel (swivel wheel) 4 . On the other hand, the length of the rod-shaped body 131 of the loading platform contact rod 13 is appropriately set depending on the contact position of the load receiving support portion 71 of the carriage to be used.

FIG. 5 is an explanatory diagram showing the mechanism of the universal wheel rotation control mechanism.
(a) Control State The rod-shaped body 121 of the universal wheel rotation control rod 12 is lowered to the receiving portion 111 of the retainer 11 by its own weight. As shown in FIG. 4(c), the claw portion 133 of the loading platform contact rod 13 meshes with the claw receiving portion 123 of the swivel wheel rotation control rod 12, so that the rod-like body 131 of the loading platform contact rod 13 can move toward the swivel wheel rotation control rod. It maintains the same posture (horizontal state) as the 12 rod-shaped bodies 121 .
(b) Automatic release state When the loading platform 7 is lowered, the tip of the rod-shaped body 131 of the loading platform contact rod 13 is pushed down by the loading support part 71 and lowered downward from the horizontal state, as shown in FIG. 4(c). Since the claw portion 133 of the loading platform contact rod 13 and the claw receiving portion 123 of the swivel wheel rotation control rod 12 are engaged with each other, the distal end portion of the rod-like body 121 of the swivel wheel rotation control rod 12 is lifted upward from the horizontal state. Rotational control of the rear wheel (swivel wheel) 4 in the turning direction is automatically released.
(c) Manual release state When the tip of the rod-shaped body 121 of the universal wheel rotation control rod 12 is lifted upward from the horizontal state by the releasing means described later or by operating the foot of the work vehicle, the rear wheel (swivel wheel) 4 is released. Rotation control in the turning direction is released. Since the swivel wheel rotation control rod 12 and the bed contact rod 13 are not connected, only the swivel wheel rotation control rod 12 can be lifted upward. At this time, the bed contact rod 13 is in a free state.

FIG. 6 is a front view showing an example of releasing means. A lever 14 is installed on the rear side of the strut frame 5 of the baggage carrier 1, and the upper end of the wire 15 attached to the free wheel rotation control rod 12 is connected to the lever 14. - 特許庁When the operator grips the lever 14, the tip of the rod-shaped body 121 of the swivel wheel rotation control rod 12 is lifted upward from the horizontal state via the wire 15, and the rotation control of the rear wheel (swivel wheel) 4 in the turning direction is released. (See FIG. 5(c)).

FIG. 7 is a front view showing another example of the releasing means. A lever 16 is installed on the rear side of the strut frame 5 of the luggage carrier 1, and the upper end of the link rod 17 attached to the universal wheel rotation control rod 12 is connected to the lever 16. - 特許庁When the operator lowers the lever 16, the tip of the rod-shaped body 121 of the universal wheel rotation control rod 12 is lifted upward from the horizontal state via the link rod 17, and the rotation control of the rear wheel (universal wheel) 4 in the turning direction is performed. It is released (see FIG. 5(c)).

FIG. 8 is a front view showing an example of positioning means. A vertical guide rod 20 is arranged on the front side of the support frame 5 of the luggage carrier 1 and fixed by a guide rod fixing metal fitting 21 . One or a plurality of positioning stoppers 22 are attached to the guide rod 20 to determine the height position of the lifting platform 7 . When the loading platform 7 is raised, the forward protruding claw of the positioning stopper 22a abuts the upper end of the loading platform 7 to be locked. On the other hand, when the loading platform 7 is lowered, the forward protruding claw of the positioning stopper 22b escapes rearward to allow the loading platform 7 to pass through, resulting in an unlocked state.

9 and 10 are explanatory diagrams (1) to (6) showing how the baggage carrier according to the present invention is used.
(1) Lower the loading platform 7 .
As described in detail in the automatic release state described above, when the tip of the rod-shaped body 131 of the loading platform contact rod 13 is pushed down by the load receiving support portion 71 of the loading platform 7 and descends downward from the horizontal state, the claw portion 133 of the loading platform contact rod 13 Since the hook receiving portion 123 of the swivel wheel rotation control rod 12 is meshed with the hook receiving portion 123 of the swivel wheel rotation control rod 12, the tip portion of the rod-shaped body 121 of the swivel wheel rotation control rod 12 is lifted upward from the horizontal state, and the rear wheel (swivel wheel) 4 is moved. Rotational control in the turning direction is automatically canceled (see FIG. 5(b)). In this state, the truck is moved to the destination.
(2) Raise the loading platform 7 when the destination is reached.
As described in detail in the control state described above, when the loading platform 7 is raised, the loading platform contact rod 13 is lifted by the weight of the universal wheel rotation control rod 12, and at the same time, the universal wheel rotation control rod 12 is lowered, causing the rear wheel (rotary wheel) 4 to turn. Directional rotation is controlled (see FIG. 5(a)).
(3) When fine positioning is required when lifting a load As described in detail in the above-mentioned manual release state, by lifting the free wheel rotation control rod 12 by the release means or by operating the operator's foot, The rear wheel (swivel wheel) 4 can be rotated in the turning direction and positioned (see FIG. 5(c)).
(4) Operate the trolley to lift the load.
As in (2) above, the swivel wheel rotation control rod 12 is lowered to control the rotation of the rear wheel (swivel wheel) 4 in the turning direction.
(5) Retract the cart to a position where the load can be lowered safely.
As in (4) above, the swivel wheel rotation control rod 12 is maintained in a lowered state to control the rotation of the rear wheel (swivel wheel) 4 in the turning direction.
(6) Lower the carrier 7 on which the load is placed.
As in (1) above, the tip of the rod-shaped body 121 of the universal wheel rotation control rod 12 is lifted upward from the horizontal state, and the rotation control of the rear wheel (universal wheel) 4 in the turning direction is automatically canceled (Fig. 5). (b)). In this state, the trolley on which the baggage is placed is carried to the next destination.

1 luggage carrier 2 base frame 3 front wheel 4 rear wheel (flexible wheel)
41 Rotating shaft 5 Strut frame 6 Lifting mechanism 7 Loading platform 71 Load receiving support 72 Load receiving unit 10 Universal wheel rotation control mechanism 11 Retainer 111 Receiver 112 Shaft 12 Universal wheel rotation control rod 121 Rod-shaped body 122 Rotating base 123 Claw receiver 13 Loading platform Contact rod 131 Rod-shaped body 132 Rotating base 133 Claw 14 Lever 15 Wire 16 Lever 17 Link rod 20 Guide rod 21 Guide rod fixture 22 Positioning stopper

Claims (3)

A cargo carrier which has a pair of flexible wheels provided on the rear end side of a base frame, and moves with cargo placed on a loading platform having a lifting function supported by a support frame, wherein the universal vehicle can be attached to the cargo carrier. Equipped with a rotation control mechanism,
The free wheel rotation control mechanism includes a retainer fixed to the base frame, and a free wheel projecting in a direction perpendicular to a turning axis of the free wheel and mounted to be rotatable in the vertical direction within a turning range of the free wheel. A wheel rotation control rod and a load-bed contact rod projecting toward the load-receiving support portion of the load-bed and mounted so as to be rotatable in the vertical direction. the claw receiving portions of the control rods are arranged side by side so as to mesh with each other, and the universal wheel rotation control rod and the bed contact rod are rotatably and integrally connected by a shaft;
When the loading platform is lowered, the leading end of the loading platform contact rod moves downward from the horizontal position, and accordingly, the leading end of the free wheel rotation control rod rises upward from the horizontal position to rotate the flexible wheel in the turning direction. A luggage carrier, wherein control is automatically released, and rotation control in the turning direction of the free wheel is released by release means operated by an operator. The release means operated by the operator lifts the tip of the free wheel rotation control rod from a horizontal position by operating an operation lever provided on the strut frame to release the rotation control of the free wheel in the turning direction. 2. The luggage carrier according to claim 1, wherein the carrier is a carrier. 3. The support frame according to claim 1, wherein a vertical guide rod is provided on the front side of the support frame, and a positioning stopper is attached to the guide rod to determine the height position of the cargo bed that moves up and down. luggage trolley.

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