JPH11291918A - Driving and stopping device used for self-traveling footstool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To retain the stopping of a wheel during a work on a footstool and to smoothen and ensure the movement in the movement of the footstool by fixing a wheel and a gear to an axle rotatably provided on the lower end of the leg part of the footstool, and rotating and stopping the wheel by a pedal. SOLUTION: When a worker presses down a pedal 9 in a direction to move, a connecting bar 7 is pressed down, a ratchet metal fitting 6 is rotated around a ratchet metal fitting pin 14 by a universal joint 12 and advanced to the position of a dotted line A19, and a claw b18 is engaged with a gear 5 and released from a lock pin 13. When the pedal 9 is continuously pressed down, the ratchet metal fitting 6 and a gear builtup frame 11 are rotated around an axle 4 and advanced to the position of a dotted line B20. At this time, since the claw b18 is engaged with the gear 5, a wheel 3 directly connected to the gear 5 is also rotated, and a footstool is moved in the direction intended by the worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for driving and stopping a wheel used for a step platform that can be moved while riding.

[0002]

2. Description of the Related Art A conventional apparatus is disclosed in Utility Model Registration No. 3033.
No. 716), which is a simple one shown in FIG.
When moving the springboard, there was a problem with smooth movement.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device which can hold a stop of wheels while working on a platform and can move smoothly and surely when moving the platform. .

[0004]

Now, the structure will be described. The wheel 3 and the gear 5 are fixed to an axle 4 rotatably provided at the lower end of the foot 2 of the step platform.
The wheel 3 is rotated by rotating the gear 5 by the connecting rod 7, the universal joint 12, the ratchet fitting 6, the gear assembly frame 11, etc., or the wheel 3 is stopped, and the wheel 3 is stopped and held simultaneously. I do.

[0005]

Next, the operation of the present invention will be described. When the operator does not operate the petal 9, the petal 9, the connecting rod 7, the ratchet fitting 6, and the gear assembly frame 11 include the return spring 16 and the return spring. Due to the repulsive action of 15, the pawl a of the ratchet fitting engages with the gear 5 at the position shown by the solid line in FIG. The wheel 3 is engaged and cannot rotate in the direction of the arrow, counterclockwise 22. Since this device is mounted symmetrically on the foot of the step ladder, when the petal 9 is not operated, both left and right It does not move.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The function of the present invention for moving while riding on a step platform will be described. When the operator steps down on the petal 9 in the direction in which the operator wants to move, the connecting rod 7 is pushed down, and the universal joint 12 is moved. The ratchet bracket 6 rotates about the ratchet bracket pin 14 and moves to the position indicated by the dotted line A19 in FIG. By stepping down, the ratchet fitting 6 and the gear assembly frame 11 rotate about the axle 4 and advance to the position indicated by the dotted line B20 in FIG. 1. At this time, since the claw b18 is engaged with the gear 5, As a result, the wheel 3 directly connected to the gear 5 also rotates, and the step moves in the direction desired by the operator. When the operator releases the petal 9, the gear assembly frame 11, the ratchet fitting 6, and the connecting rod 7 are returned to the stopped positions by the repulsive action of the return spring 15 and the return spring 16, but the wheels 3, the gear 5 The axle 4 does not run backward due to the center line of the axle 4, the gear assembly frame 11, the ratchet fitting pin 14 and the like, and the shape of the pawl of the ratchet fitting 6, which has been previously rotated. .

[0007]

According to the present invention, the structure shown in FIG. 5 can be smoothly and reliably moved, stopped, and held.

[Brief description of the drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a side view of the present invention.

FIG. 3 is an overall side view of the present invention.

FIG. 4 is a perspective view of a self-propelled stepping board.

FIG. 5: Self-propelled stepping board (utility model registration No. 3333716)
No.)

[Explanation of symbols]

 1 is a stepping body 2 is a stepping leg 3 is a wheel 4 is an axle 5 is a gear 6 is a ratchet fitting 7 is a connecting rod 8 is a spring 9 is a petal 10 is a pin 11 is a gear assembly frame 12 is a free joint 13 is a lock pin 14. Ratchet bracket pin 15 is return spring 16 is return spring 17 is claw a 18 is claw b 19 is dotted line A 20 is dotted line B 21 is arrow, clockwise 22 is arrow, counterclockwise

Claims (1)

[Claims] An axle is rotatably provided at a lower end of a step leg portion, and a wheel and a gear are fixed to the axle, a ratchet bracket, a gear assembly frame, and a connecting rod. ,
A device for rotating the wheel 3 or holding the wheel 3 by the petal 9.