JPH06135356A - Running vehicle - Google Patents

Abstract

PURPOSE:To provide a running vehicle with simple structure and a low cost, while run-on-step traveling can be smoothly perforthed. CONSTITUTION:A running vehicle is formed so as to be capable of run-on-step traveling with revolution of each ground contact wheel 10, by arranging in line a plurality of radial support arms 9 on an axle 8, pivoting the ground contact wheels 10 on the outer end side of each support arm 9, and rotation- driving the axle 8. Braking members 11 which can switch the wheels 10 from/to one state allowing each ground contact wheel 10 only to rotate on its own axis in the designated direction to/from the other state allowing the wheel 10 only to rotate in the reverse direction in a free oscillating manner, are mounted on each support arm 9. The vehicle is also provided with a toggle spring for switching and holding the braking members 11 in the above two states, and formed so that the braking members 11 are engaged and held in a neutral position not to exert the brake action on the ground contact wheels 10 by a support bracket of the toggle spring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a structure in which a plurality of radial support arms are connected to an axle, a ground wheel is supported on the outer end side of each support arm, and the axle is pivotally driven.
The present invention relates to a traveling vehicle configured to be able to run on a step by revolving each ground wheel.

[0002]

2. Description of the Related Art In the traveling vehicle described above, conventionally, for example, as disclosed in Japanese Utility Model Laid-Open No. 60-219169,
When each ground wheel is configured to be driven by an electric motor separately, and when the support arm is rotated to revolve and rotate the ground wheel to run on a step, the rotation of the electric motor is stopped to prevent rotation. There was one that was configured to run in the state.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
By rotating the ground wheel in a stable state with multiple ground wheels rotating, it can travel smoothly on a flat ground, and by orbitally driving the ground wheel, it is smooth even on steps such as stairs. It is configured so that the vehicle can be ridden and run on the step, and when the pedestrian runs on the step, the grounding wheel body is prevented from rotating in an idling state and becoming unable to step on the step. However, when the traveling drive device having the above-described conventional structure is used in, for example, a small walk-type vehicle, an electric motor must be provided for each of a plurality of ground wheels, and the structure is complicated and the weight of the machine body is large. However, there is also a drawback that the cost becomes high and the cost becomes high. An object of the present invention is to provide a traveling vehicle that can smoothly run on a step and has a simple structure and low cost.

[0004]

The characteristic configuration of the present invention is, in the traveling vehicle described at the beginning, a state in which only the rotation rotation of each ground wheel in a predetermined direction is allowed and only the rotation rotation in the opposite direction is allowed. A toggle member for swinging the swing member to each of the support arms and a toggle spring for switching and holding the brake member in the two states. The support bracket of the toggle spring causes the brake member to contact the grounding wheel. The point is that the body is configured to be engaged and held in a neutral position where it does not brake.

[0005]

For example, when climbing a stepped portion such as stairs, if the braking member for each grounding wheel body is set in a state in which only the forward rotation of the grounding wheel is allowed and each support arm is rotationally driven, The grounded wheel that rides on the ground can support the vehicle body on the ground without being rotated and the rotation of the wheeled body on the rear side can be prevented.As a result, the revolution of the wheels can result in the entire vehicle body being lifted upward with the grounded wheel as a fulcrum. It is possible to get over a step smoothly. Also, when descending stairs, if the braking member is set to a state in which only the rearward rotation is allowed and each support arm is rotationally driven, the ground wheel is moved backward when the body weight is moved at the step. The vehicle body can be supported on the ground without rotating and becoming unstable, and smooth vehicle movement can be performed. When the vehicle is traveling on a flat ground, the braking member may be set to the neutral position so that the vehicle can be manually pushed in any of the front and rear directions. Moreover, the supporting member of the toggle spring for swinging and holding the braking member can be used to hold the braking member in the neutral position, and the member can also be used as a simple structure.

[0006]

[Effects of the Invention] Therefore, it is possible to ride over a step,
Further, when traveling on a flat ground, it is a traveling vehicle that can travel in both front and rear directions, but can be configured with extremely simple members, the structure is simplified, and the cost can be reduced.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
Fig. 1 shows a walk-behind carrier which is an example of a traveling vehicle. This transporting vehicle is provided with a pair of left and right traveling devices 2 and 2 on a frame body 1 also serving as a loading platform, and a steering handle 3 is integrally extended from the rear portion of the frame body 1 so as to be walkable and steerable. The luggage mounting portion 1a of the frame body 1 is formed into an arc shape so that a cylindrical heavy object such as a propane gas cylinder can be mainly mounted and transported, and near the control handle 3,
A grounding stand 4 for supporting the vehicle body is provided so that the luggage mounting portion 1a can be maintained in a substantially horizontal posture even when the steering handle 3 is released. When the gas cylinders G1 are loaded and transported, the grounding stand 4 also serves as a floating prevention member that holds one end of the gas cylinders G loaded in a stacked state. That is, the grounding stand 4 is rotatable around the horizontal axis X1.
It is pivotally supported in the cylinder and acts as a grounding stand 4 by rotating it downward, and by rotating it upward, a locking portion 5 formed in the middle is provided on the upper side of the gas cylinder G1. It is configured so that it can be prevented from rising by being locked to the protection part 6, and in the case of a large cylinder G2 without a cylindrical protection part, it can be pressed and supported by a loop-shaped presser 7 formed in the middle part. Configured.

As shown in FIGS. 1 and 2, the traveling device 2 has four support arms 9 radially attached to the left and right sides of an axle 8 which is rotationally driven by an electric motor M with a reduction mechanism so as to be integrally rotatable. At the same time, a rubber tire type wheel 10 [an example of a grounding wheel] is rotatably supported on the outer end of each support arm 9. Also, each support arm 9 has
Each wheel 10 is provided with a swingable braking member 11 that is switched between a state in which only the rotation rotation in a predetermined direction is permitted and a state in which only the rotation rotation in the opposite direction is permitted. More specifically, as shown in FIGS. 3 to 5, a braking member 11 that abuts against the outer peripheral surface of the wheel 10 is provided on a support shaft 12 provided on the support arm 9 in parallel with the axis of the wheel 10. The braking member 11 is rotatably mounted around an axis X2, and the front and rear braking action portions 11a and 11b are swingably switched by a toggle spring 13 so that the front and rear braking action portions 11a are pressed against the outer peripheral surface of the wheel 10 in an oblique posture. Configured. Then, for example, when the front braking action portion 11a is pressed against the wheel outer peripheral surface,
When the wheel 10 rotates forward (a direction), the wheel 10 acts so as to push up the diagonal surface of the braking action portion 11a, so that the wheel 10 is allowed to rotate, and when it rotates rearward (b direction), The end of the braking action portion 11a bites into the wheel outer peripheral surface, and rotation is blocked. Similarly, when the rear braking action portion 11b is pressed against the outer peripheral surface of the wheel, the rotation in the [a direction] is blocked, and the rotation in the [b direction] is allowed. As shown in FIG. 7, the support bracket 14 that supports the toggle spring 13 is composed of an L-shaped plate spring, and is fastened and fixed by the step portion of the support shaft 12 and the nut 15. An arcuate recess 16 is formed at the lower end of the support bracket 14. Further, as shown in FIG. 6, the support arm portion 11c and the braking action portions 11a and 11b of the braking member 11 are integrally molded by a plate material, and the arc-shaped convex portion 1 is formed at the center of the bending molding portion 11d therebetween.
7 are formed. Each braking action portion 11 of the braking member 11
When both a and 11b are in the neutral position where they do not act on the wheel 10, the arc-shaped recess 16 at the lower end of the support bracket 14 is provided.
The arcuate convex portion 17 of the braking member 11 is configured to be fitted and engaged with each other by the elastic force of the support bracket 14 so as to be engaged and held at the neutral position. With this configuration, when traveling on a flat ground, the braking member 11 is set to the neutral position, and the two adjacent wheels 10 out of the four wheels 10 are operated in a stable posture in which they are in contact with the ground. It is possible to manually push the steering wheel 3 while gripping the handle 3, and when riding on a step such as stairs, depending on the difference between the upward movement and the downward movement, the braking member 11
By switching the posture of the wheel 10, the wheel 10 is prevented from becoming unstable while preventing the posture from becoming unstable due to free rotation of the wheel 10.
By this, it is possible to drive the orbital and smoothly move up and down.

It should be noted that although reference numerals are given in the claims for facilitating the comparison with the drawings, the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

[Fig. 1] Side view of the entire carrier

[Fig. 2] Front view of the carrier

FIG. 3 is a side view of a braking member arrangement portion.

FIG. 4 is a cutaway front view of a braking member arrangement portion.

FIG. 5 is a side view of a braking member arrangement portion in a braking state.

FIG. 6 is a side view of a braking member.

FIG. 7 is a view showing a support bracket.

[Explanation of symbols]

 8 Axle 9 Support arm 10 Wheel 11 Braking member 13 Toggle spring 14 Support bracket

Claims (1)

[Claims] 1. A plurality of radial support arms (9) are connected to an axle (8), and a ground wheel (10) is supported on the outer end side of each support arm (9), and the axle (8). ) Is rotationally driven, and the traveling vehicle is configured to be capable of traveling on a step by revolving each grounding wheel body (10),
Each supporting arm is provided with a swingable braking member (11) which is switched between a state in which only the rotation of the ground wheel body (10) in a predetermined direction is allowed and a state in which only the rotation rotation in the opposite direction is allowed. (9) and the braking member (1
Toggle spring (1) for switching and holding 1) in the above two states
3) A traveling vehicle provided with 3), and the support bracket (14) of the toggle spring (13) is configured to hold the braking member (11) in a neutral position where the grounding wheel body (10) is not braked.