JPH0632471Y2 - Pedestrian vehicle safety device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention is intended to automatically stop the traveling of a walk-type vehicle when the operator is caught between the aircraft and an obstacle when moving backward. The present invention relates to a safety device for a walking type vehicle.

(Prior Art) Conventionally, as a safety device for this type of walk-behind vehicle, there has been a fact
-109102 gazette, etc., but in these technologies, there is a safety bar that operates when the operator is caught between the aircraft and an obstacle during reverse travel, and Since the clutch lever that controls the connection and disconnection is simply connected, it is necessary to rotate the safety bar largely in order to switch the clutch lever from the on position to the off position, so the safety device may not operate depending on the conditions. Further, the safety bar that rotates in this large range may hinder the operation of the gear shift lever or the like.

(Problems to be Solved by the Invention) This invention intends to solve the above-mentioned drawbacks of the prior art and to provide a safety device for a walk-type vehicle that does not hinder other operations and operates reliably. is there.

(Means for Solving the Problem) A handle 2 projecting from the rear of the machine body 1 is rotatably supported on the machine body 1 at a lower rear portion of the handle 2 so that the safety bar 3 is rotated to interrupt the traveling of the machine body 1. In order to configure the clutch lever 4 which controls the clutch lever 4 to the stop position, a pin 6 is provided below the rotation fulcrum shaft 5 of the clutch lever 4 so as to project laterally, and the pin 6 extends in the front-rear direction. It is slidably fitted in the elongated hole 7 formed in the above, and one end of the operating rod 8 is pivotally connected to the end of the connecting arm 9 attached to the safety bar 3 and extended forward. The following is a safety device for a walk-behind vehicle.

(Operation and Effect of Device) When the pilot is caught between the aircraft and an obstacle when the aircraft is moving backward, the safety bar 3 located behind the handlebar 2
Is pushed forward by the human body and is rotated around the pivotal support portion to the machine body 1, and is attached below the rotation fulcrum shaft 5 of the clutch lever 4 by the end of the elongated hole 7 of the operating rod 8 via the connecting rod 9. Pin 6
Is pressed to rotate the clutch lever 4 toward the disengaged position. When the clutch lever 4 exceeds the pulling fulcrum of the clutch spring by this forced rotation, the operating rod 8 is pulled by the clutch lever 4 and further rotated to the disengaged position. At this time, the pin 6 attached to the lower side of the rotation fulcrum shaft 5 of the clutch lever 4 slides in the elongated hole 7 of the operating rod 8, and the operating rod 8 is pivotally bent at the connecting pivotal support portion with the connecting arm 9. Therefore, the safety bar 3 hardly moves, the rotation range of the safety bar becomes small, and there is no hindrance to the operation of the shift lever or the like at the clutch disengaged position.

In addition, the clutch lever 4 is rotated by the small rotation of the safety bar 3.
Can be switched to the off position and its operation is reliable.

(Example) In the illustrated example, the device of the present invention is applied to a walk-behind carrier, and a traveling device composed of crawlers 10 and 10 is provided in the lower portion of the machine body 1, and in the front portion of the machine body 1. Is the packing frame 11,1
A loading platform 12 surrounded by 1 is mounted, and a hydraulic cylinder 13 is configured to allow dumping.

In addition, a prime mover 14 and a transmission 1
5, a hydraulic pump 16 and the like are mounted.

The upper part of the prime mover 14 is covered with an operation frame 17, and the operation frame is extended to one side to operate the meshing state of the gears in the mission 15 with this frame to intermittently transmit power to the left and right crawlers 10, 10 Side clutch lever 1 to change the running direction of
8 and 18, the clutch lever 4 that stops the traveling of the crawlers 10 and 10 by connecting and disconnecting the power between the prime mover 14 and the mission 15, and the hydraulic pump 16 to the hydraulic cylinder 13.
A hydraulic lever 19 is provided to control the oil supply to the dump truck 12 and control the dumping operation of the cargo bed 12. The clutch 20 is connected to operate the brake 20 by rotating the clutch lever 4 rearward from the disengaged position.

Reference numeral 21 denotes a speed change lever, which changes a meshing state of gears in the mission 15 to select a traveling speed.

A loop handle 2 is provided on the rear portion of the operation frame 17 so as to project rearward, and a U-shaped safety bar 3 is arranged along the lower rear portion of the loop handle 2 and the operation frame 1 is provided.
Both ends are attached to the lower ends of arms 23, 23 that are rotatably supported by pins 22, 22 on both sides. One end of a connecting arm 9 is fixedly connected to the safety bar 3, and an L-shaped adjusting rod 24 is rotatably and pivotally connected to the other end of the connecting arm 9. A screw 25 is engraved at the tip of the adjusting rod 24, inserted into a hole of a bent portion 26 at the base end of the operating rod 8 and connected to each other by nuts 27, 27.

A long hole 7 is bored in the operating rod 8, and a pin 6 which is attached to the lower side of the rotation fulcrum shaft 5 of the clutch lever 4 and projects laterally is slidably fitted in the long hole 7. .

A spring 28 is stretched between the tip of the operating rod 8 and the operating frame 17 to elastically bias the operating rod 8 toward the safety bar 3. Reference numeral 29 is a stopper, which restricts the rearward movement of the arm 23.

When the pilot tries to get caught between the obstacle and the handle 2 of the aircraft 1 while traveling in reverse, the human body contacts the safety bar 3 protruding further rearward than the handle 2, and the safety bar 3 pushes the pin 2
A connecting arm 9 pivotably connected to the safety bar 3 and an adjuster rod 2 pivotally connected to the other end of the connecting arm 9 are pivoted downward together with the arms 23 and 23 around the pivotal points 2 and 22.
4. The actuating rod 8 which is clamped and fixed to the adjuster rod 24 is pushed toward the front side of the machine body. Therefore, the pin 6 at the lower end of the clutch lever 4 that fits into the end of the elongated hole 7 of the operating rod 8 is pressed along with the movement of the operating rod 8, and the clutch lever 4 is moved around the pivotal fulcrum shaft 5 with an arrow ( When it is rotated in the direction (a) and thereby exceeds the traction fulcrum position (B) by the clutch spring, the clutch spring 4 and the spring 28 pull the clutch lever 4 to the clutch disengaged position (C) and the machine body 1 Stop. In the rotation range of the clutch lever 4 from the fulcrum crossing position (B) to the clutch disengagement position (C), the pin 6 fitted in the elongated hole 7 of the operating rod 8 slides in the elongated hole 7. An adjuster rod 24 that moves and is integral with the operating rod 8
Bends around the pivotal connecting portion with the connecting arm 9 to absorb the movement of the clutch lever 4 and the safety bar 3 is not rotated.

When the clutch lever 4 reaches the clutch disengaged position (C), the operating rod 8 is further pulled by the spring 28 and pivots around the pivotal connecting portion of the adjusting rod 24 integral with the operating rod 8 and the connecting arm 9. Further, the safety bar 3 is returned slightly rearward via the connecting arm 9, so that the pin 6 fitted in the elongated hole 7 of the operating rod 8 is further rotated and guided to move the clutch lever 4 to the braking position (D). ) To surely stop the machine body 1.

Accordingly, the range of rotation of the safety bar 3 is small over the range from the clutch lever 4 in the engaged position (A) to the brake position (D), and the lower speed change bar 21 or the like may be located at any position of the safety bar. It does not hinder the operation.

Further, the rotation range of the safety bar 3 may be within the range beyond the fulcrum of the clutch lever 4, and the machine body 1 can be stopped by a small contact with the human body, and the operation is reliable.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side sectional view of an essential part, FIG. 2 is a side sectional view showing an operating state, and FIG. 3 is an essential part. Is a plan view and FIG. 4 is an overall side view. In the figure, reference numeral 1 is a machine body, 2 is a handlebar, 3 is a safety bar, 4 is a clutch lever, 5 is a fulcrum shaft, 6 is a pin, 7 is a long hole, 8
Is an operating rod, and 9 is a connecting arm.

Claims (1)

[Scope of utility model registration request] 1. A safety bar 3 is rotatably pivoted on the body 1 below a handle 2 projecting from the rear of the body 1, and the safety bar 3 is rotatably supported by the body 1.
In order to configure the clutch lever 4 which controls the discontinuity of the traveling of the machine body 1 by the rotation of, the pin 6 is provided at the lower position of the rotation fulcrum shaft 5 of the clutch lever 4 so as to project laterally, 6 is slidably fitted in an elongated hole 7 formed in an operating rod 8 extending in the front-rear direction, and the operating rod 8
A safety device for a walking vehicle in which one end is attached to a safety bar 3 and is pivotally connected to an end of a connecting arm 9 extending forward so as to be rotatable.