JP2000225950A - Step difference shifting auxiliary device and carrier with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a step difference shifting auxiliary device and a carrier with the device which is excellent in ability to ride across a step difference such as a stairway and conveniently used without requiring extra force on a flat place without step difference. SOLUTION: A step difference shifting auxiliary device 1 is provided with a plurality of pendant feet 2a to 2f, a pair of side plates 4, a plurality of torsion springs 3 for position holding to position the locking position of a plurality of the pendant feet 2a to 2f, a plurality of shafts 5 for a plurality of pendant feet, a receiving fitting 9, a width determining shaft 6, a spring 11 and a leaf spring 12, a leaf spring mounting fitting 10, a plurality of screws 8, and washers 13. A plurality of the pendant feet 2a to 2f eliminate the necessity of extra force when the carrier moves on ascending and descending slopes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping movement assisting device and a transport vehicle provided with the device. In particular, the present invention relates to a step-movement assisting device that can carry a load or the like relatively easily even in a place having a step such as a staircase, and a transport vehicle including the device.

[0002]

2. Description of the Related Art As a conventional transport vehicle, particularly, a transport vehicle for transporting luggage or the like by hand, a two-transport transport vehicle is mainly used. In this conventional general two-transportation truck, it takes a great deal of power to get over steps such as stairs,
Those engaged in such work required considerable strength and strength.

[0003] For this reason, conventionally, there is a transport vehicle in which the transportation on both sides is in an endless track so as to slightly increase the ability to get over a step such as a stair. In the case of a transport vehicle in which the transportation on both sides is in an endless track shape, the shape of the endless track serving as wheels is deformed according to the shape of the steps such as stairs, so that the transport vehicle is more staircase than a general two transportation vehicle. It has excellent ability to get over the steps.

[0004]

However, according to the above-described conventional transport vehicle in which both sides of the vehicle are in an endless track, the deformability of the endless track (adaptation to the shape of the step) is required.
It is necessary to use a plurality of wheels in order to secure the rotation speed. Therefore, there is a problem that a rotational resistance of the wheels is generated in the endless track, and an extra force is necessary.

[0005] Further, since the endless track having a plurality of wheels is driven integrally, there are problems that an extra force is required in a flat place where there is no step, and that the usability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the advantage of being superior in the ability to overcome steps such as stairs, and requiring no extra force in a flat place where there is no step and is easy to use. An object of the present invention is to provide a step movement assisting device that can be improved and a transport vehicle using the device.

[0007]

In order to solve the above-mentioned problems, a step-movement assisting device according to the present invention is a step-movement assisting device for use in a transport vehicle for carrying luggage or the like; A plurality of movement assisting means, and holding means for holding the movement assisting means at a predetermined position,
The plurality of movement assisting means is characterized in that, in accordance with the movement of the carrier at the step location, the transport assisting means successively supports the transporting vehicle at the contact point of the step at the step location.

The holding means may hold the movement assisting means at a predetermined position when the corresponding movement assisting means is not in contact with the ground contact point on the step.

The movement assisting means preferably has the same curvature as the curvature of the circumference on which the portion of the step contacting the ground contact point rotates.

[0010] In the movement assisting means, the surface of the step contacting the ground contact point may be made of an elastic material such as rubber, or a plurality of grooves may be provided on the surface.

Further, each of the plurality of movement assisting means may be held at a predetermined position by a plurality of holding means.

In order to solve the above-mentioned problems, a carrier according to the present invention is provided with the above-mentioned step movement assisting device. At this time, the step movement assisting device may be attached via a leaf spring or a spring.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A step-movement assisting device according to the present invention and a transport vehicle using the device will be described in detail with reference to the drawings.

FIG. 1 is a schematic view showing an example of the structure of a step movement assisting device according to the present invention. FIG. 1A is a perspective view showing the general outline of the step movement assisting device of the present invention, and FIG.
(B) is an exploded view of the step movement assisting device. FIG.
The step-movement assisting device 1 shown in FIG.
f, a pair of side plates 4, and a plurality of position holding torsion springs 3 for determining a normal system stop position of the plurality of pendulum legs 2a to 2f.
And a plurality of pendulum leg shafts 5 for rotatably fixing the plurality of pendulum legs 2a to 2f to a predetermined position between the pair of side plates 4, and a receiver 9 having an axle hole 9a and a shaft hole 9b. And a pair of side plates 4
And a width determining shaft 6 that penetrates the shaft hole 9b of the receiving member 9 and connects the receiving member 9 and the pair of side plates 4, and is connected to a carrier (not shown) to be attached. Spring 11 and a leaf spring 12, a leaf spring mounting bracket 10 for connecting the leaf spring 12 and the side plate 4, a plurality of screws 8 for fixing and connecting each part, and between the screw 8 and the side plate 4. And a washer 13 to be inserted.

Here, the spring 11 and the leaf spring 12 for connecting to the carriages (not shown) provided at both ends of the step movement assisting device 1 may be both spring springs or leaf springs. Alternatively, another elastic body, for example, a rubber connecting member may be used.

FIG. 2 is a view showing the state of connection of the pendulum foot 2b, the position holding torsion spring 3, and the pendulum foot shaft 5. As shown in FIG. FIG. 2A is a diagram showing the torsion spring 3 for holding a position, FIG. 2B is a front view in a connected state, and FIG.
FIG. 4 is a right side view in a connected state. Here, pendulum foot 2b
Is rotatably connected to the side plate 4 (FIG. 1) by the pendulum foot shaft 5. Further, the pendulum foot 2b and the position holding torsion spring 3 are connected by a pendulum foot shaft 5. Here, one end 3a of the position holding torsion spring 3 is inserted into a spring receiving hole 7a provided in the pendulum foot 2b, and the other end 3a.
b is inserted into a spring receiving hole 7b (FIG. 1) provided in the side plate 4 (FIG. 1). The pendulum foot 2b is pivoted about the connecting portion with the pendulum foot shaft 5 by an external force (broken line in FIG. 2), and returns to a predetermined position (solid line in FIG. 2) by the position holding torsion spring 3 when the external force is released. It has become.

FIG. 3 is a view showing another connection state of the pendulum foot 2b, the position holding torsion spring 3, and the pendulum foot shaft 5. As shown in FIG. FIG. 3A is a top view in a connected state, and FIG.
(B) is a front view in the combined state. In FIG.
One end 3a of two position holding torsion springs 3 is joined to the position of the top 2b 'of the pendulum foot 2b, and the other end 3b of each position holding torsion spring 3 is provided on the side plate 4 (FIG. 1). It is inserted into a spring receiving hole (not shown). Even in the case of the configuration shown in FIG. 3, the pendulum foot 2b
The same rotational movement as in the case shown in FIG. 2 can be performed.

The other pendulum legs 2a, 2c to 2f have the same configuration as the pendulum leg 2b shown in FIGS. Here, in the pendulum legs 2a to 2f, it is preferable that the ground contact portions be on the same circumference. The shape of the pendulum legs 2a to 2f may be a fan shape or the like, as long as the ground contact portion is on the same circumference to some extent.

FIGS. 4 and 5 are views showing a carrier equipped with the step-movement assisting device 1 as shown in FIG. Here, FIG. 4 shows a state in which the wheels 45 (FIG. 5) have been removed to make it easier to understand the connection between the step movement assisting device 1 and the carrier 40. In FIGS. 4 and 5, the transport vehicle 40
Is a frame 41 and a load receiving plate 42 on which the cargo to be carried is mounted.
And a handle 44 for moving and operating the transport vehicle 40, and an axle 4
3 includes a wheel 45 connected to the center of the vehicle 3 and a step movement assisting device 1 connected to a frame of the transport vehicle 40 by a spring spring 11 and a leaf spring 12.

Here, the axle 43 connecting the wheels 45 is
The step movement assisting device 1 is penetrated through the axle hole 9a of the receiving member 9 and
Is connected to the frame 41 of the transport vehicle 40 via the.

Next, with reference to FIGS. 6 to 23, a description will be given of the ascending and descending movement of the carrier 40 provided with the step movement assisting device 1 as shown in FIG.

FIGS. 6 to 14 show the upward movement of the transport vehicle 40 at the step location, and FIGS. 15 to 23 show the downward movement of the transport vehicle 40 at the step location. In carrying the load, the load is carried by the frame 41 and the load receiving plate 42, and in the following description (FIGS. 6 to 23), the load is omitted.

First, referring to FIG. 6 to FIG.
The upward movement at the step location will be described. Truck 4
When 0 is at the step, the handle 44 is operated so that one of the pendulum feet 2a to 2f of the step movement assisting device 1 contacts the corner 60 of the step (FIGS. 6 and 7). In FIG. 7, the pendulum foot 2a is in contact with the first corner 60 of the step. At this time, the step movement assisting device 1 (not shown) on the opposite side of the carrier 40 also has the pendulum foot 2a (not shown) in contact with the first corner 60 of the step.

Next, when the handle 44 of the transport vehicle 40 is lifted, the pendulum foot 2a rotates about the pendulum foot shaft 5 as shown in FIG. Wheels 45 rise (FIG. 8). At this time, it is desirable that the contact point with the corner 60 of the step of the pendulum foot 2a does not shift. Therefore, in order to increase the frictional resistance of the ground contact portions (contact portions with the corners of the steps) of each of the pendulum legs 2a to 2f,
a to 2f is covered with an elastic material such as rubber on the grounding portion,
Preferably, a plurality of grooves are provided in the ground portion in the lateral direction.

Subsequently, the next pendulum foot 2b is moved to the corner 60 of the step.
(FIG. 8), and when the carrier 40 is lifted as it is,
The fulcrum supporting the transport vehicle 40 moves from the pendulum foot 2a to the contact point of the pendulum foot 2b. When the transport vehicle 40 is further lifted from this position, the pendulum foot 2a is opened, and the pendulum foot 2a is moved to a predetermined position by the spring force of the position holding torsion spring 3 (FIGS. 1 to 3) which is fixed to the pendulum foot 2a. Return to position (FIG. 9).

In the same manner, the fulcrum for supporting the transport vehicle 40 shifts to the adjacent pendulum legs in the same manner (FIGS. 10 to 1).
2). 8 shows the state of movement of the fulcrum of the transport vehicle 40 from the pendulum foot 2a to the pendulum foot 2b, and FIG.
FIG. 10 shows a pendulum foot 2c to a pendulum foot 2d, and FIG.
11 shows a pendulum foot 2d to a pendulum foot 2e, and FIG.
The moving state of the fulcrum of the transport vehicle 40 from e to the pendulum foot 2f is shown.

Finally, the fulcrum of the transport vehicle 40 is moved from the pendulum foot 2f to the wheel 45 (FIG. 13), and the upward movement of the transport vehicle 40 at the first step is completed.

Then, in order to move up to the next step, the transport vehicle 40 is lifted, and the corner 6 of the next step is raised.
1 comes into contact with the pendulum foot 2a (FIG. 14). Hereinafter, the carrier 40 is lifted up by the step movement assisting device 1 attached to the carrier 40 in the same manner.

Next, referring to FIG. 15 to FIG.
Downward movement at a step location of 0 will be described. Here, the movement of the fulcrum supporting the carrier 40 at the corner 150 of the step is the same as the movement of the contact part of the pendulum foot described above. In addition, the movement of the pendulum foot is the same as in the above-described upward movement. In FIG. 15, when the truck 40 comes to a step location (downhill), the handle 44 is operated so that the pendulum foot 2f of the step movement assisting device 1 contacts the corner 150 of the step (FIG. 16). At this time, in the step movement assisting device 1 (not shown) on the opposite side of the transport vehicle 40, the pendulum foot 2f (not shown) is also in contact with the first corner 150 of the step.

Next, when the transport vehicle 40 is gradually moved downward, the fulcrum supporting the transport vehicle 40 is moved from the pendulum foot 2f to the pendulum foot 2f.
It moves to the contact point of e (FIG. 17). When the transport vehicle 40 is further moved downward from this position, the pendulum foot 2f is released, and the torsion spring 3 for holding the position, which is fixed to the pendulum foot 2f.
The pendulum foot 2f returns to a predetermined position by the spring force of FIGS. 1 to 3 (FIG. 18).

In the same manner, the fulcrum for supporting the transport vehicle 40 shifts to the pendulum legs adjacent to each other in the same manner (FIGS. 19 to 2).
2). That is, FIG. 16 shows the state of movement of the fulcrum of the transport vehicle 40 from the wheel 45 to the pendulum foot 2f, and FIG.
f to pendulum foot 2e, FIG. 18 shows pendulum foot 2e to pendulum foot 2
19 shows the state of movement of the fulcrum of the transport vehicle 40 from the pendulum foot 2c to the pendulum foot 2a, and FIG. 19 shows the state of movement of the fulcrum from the pendulum foot 2b to the pendulum foot 2b.

Finally, the fulcrum of the transport vehicle 40 is moved from the pendulum foot 2a to the wheel 45 (FIG. 22), and the downward movement of the transport vehicle 40 at the first step is completed.

Then, in order to further descend the next step, the carriage 40 is moved downward, whereby the pendulum foot 2f comes into contact with the corner 151 of the next step (FIG. 23).
Hereinafter, similarly, the carrier 40 is moved downward by the step-movement assisting device 1 attached to the carrier 40.

While the embodiment of the step movement assisting device of the present invention and the carrier provided with the device have been described above, the shape of the corner of the step is not limited to a right angle, and may be any shape.

[0035]

As described above, according to the step-movement assisting device of the present invention and the carrier equipped with the device, the pendulum of each of the step-movement assisting devices on both sides is used when the carrier is moved up and down. Since the carrier is supported with the foot as a fulcrum, only the load of the carrier and the drag of the position holding torsion spring act. Therefore, when the carrier is moved up and down, particularly when moving up, the carrier can be moved with minimum force without requiring extra force.

Further, since the pendulum foot of the step movement assisting device of the present invention and the wheel of the carrier can be provided independently,
In a flat part, the vehicle can be moved only by the wheels, so that the vehicle can be moved with minimal force without requiring extra force.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a configuration example of a step movement assisting device of the present invention.

FIG. 2 is a view showing a connected state of a pendulum foot, a position holding torsion spring, and a shaft for a pendulum foot.

FIG. 3 is a view showing a connected state of a pendulum foot, a position holding torsion spring, and a pendulum foot shaft.

FIG. 4 is a view showing a carrier provided with the step movement assisting device of the present invention shown in FIG. 1;

FIG. 5 is a view showing a carrier provided with the step movement assisting device of the present invention shown in FIG. 1;

FIG. 6 is a diagram illustrating an upward movement of a transport vehicle at a step location.

FIG. 7 is a diagram showing an upward movement of a transport vehicle at a step location.

FIG. 8 is a diagram illustrating an upward movement at a stepped location of a transport vehicle.

FIG. 9 is a diagram illustrating an upward movement of a transport vehicle at a stepped position.

FIG. 10 is a diagram illustrating an upward movement at a stepped position of a transport vehicle.

FIG. 11 is a diagram showing an upward movement at a stepped position of a transport vehicle.

FIG. 12 is a diagram showing an upward movement at a stepped position of a transport vehicle.

FIG. 13 is a diagram showing an upward movement at a stepped position of a transport vehicle.

FIG. 14 is a diagram illustrating an upward movement at a stepped location of a transport vehicle.

FIG. 15 is a diagram showing a downward movement at a step location of the transport vehicle.

FIG. 16 is a diagram illustrating a downward movement at a step location of the transport vehicle.

FIG. 17 is a diagram showing a downward movement of the carrier at a step location.

FIG. 18 is a diagram illustrating a downward movement of a transport vehicle at a step location.

FIG. 19 is a diagram illustrating a downward movement at a step location of the transport vehicle.

FIG. 20 is a diagram showing a downward movement of a transport vehicle at a step location.

FIG. 21 is a diagram illustrating a downward movement at a step location of a transport vehicle.

FIG. 22 is a diagram showing a downward movement at a step location of the transport vehicle.

FIG. 23 is a diagram illustrating a downward movement of a carrier at a step location.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Step difference assisting device 2a-2f Pendulum leg 3 Position holding torsion spring 4 Side plate 5 Pendulum leg shaft 6 Width determining shaft 7a, 7b Spring receiving hole 8 Screw 9 Receiver 9a Axle hole 9b Shaft hole 10 Plate spring mounting bracket 11 Spring spring 12 Leaf spring 40 Transport vehicle 41 Frame 42 Load receiving plate 43 Axle 44 Handle 45 Wheel 60, 61, 150, 151 Step corner

Claims (8)

[Claims] 1. A step-movement assisting device for use in a carrier for carrying luggage or the like, comprising: a plurality of movement assisting means rotating within a predetermined range; and a holding means for holding the movement assisting means at a predetermined position. Means, and wherein the plurality of movement assisting means, in response to movement of the carrier at a step location, at a ground contact point of the step at the step location,
A step-movement assisting device, wherein the carrier is supported by successively adjacent movement assisting means. 2. The apparatus according to claim 1, wherein the holding means holds the movement assisting means at a predetermined position when the corresponding movement assisting means is not in contact with the contact point of the step. Step movement assist device. 3. The step movement assisting device according to claim 1, wherein the movement assisting unit has the same curvature as a curvature of a circumference around which a portion of the step contacting the ground contact point rotates. . 4. The step movement assisting device according to claim 1, wherein a surface of a portion of the movement assisting unit that comes into contact with a ground contact point is made of an elastic material such as rubber. 5. The step movement assisting device according to claim 1, wherein the movement assisting means has a plurality of grooves on a surface of a portion of the step contacting the grounding point. 6. The step movement assisting device according to claim 1, wherein each of the plurality of movement assisting means is held at a predetermined position by a plurality of the holding means. 7. A carrier equipped with the step movement assisting device according to claim 1. 8. The carrier according to claim 7, wherein the step movement assisting device is attached via a leaf spring or a spring.