JPH031646Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a clutch device for a transport vehicle that allows the clutch lever to be switched directly or indirectly for releasing the clutch.

[Conventional technology]

The clutch device 2' of this type of conventional transport vehicle is
As shown in FIG. 7, it is provided on a lever rotation shaft 9 fixed to the handle portion 6 of the carrier. This clutch device 2' has a clutch lever 11 and a clutch link receiver 12 fixed to a cylindrical body 10 that fits on the lever rotation shaft 9, and one end side of the clutch link 13 is fixed to the clutch link receiver 12. has been done. The other end of this clutch link 13 is connected to a clutch 15 via a wire 14 or the like, and the clutch 15 is operated and released by switching the clutch lever 11.

[Problem that the invention attempts to solve]

However, in the clutch device 2' of the above-mentioned transport vehicle,
Even in an emergency, there is a problem in that the user must extend his arm and make a large movement to switch the clutch lever 11 to the release position. Additionally, if the carrier gets caught between the carrier and an obstacle such as a wall while the carrier is in use, and the clutch lever 11 cannot be switched by hand, the carrier cannot be stopped, which is dangerous. There is a problem.

[Means for solving problems]

This idea was made in view of the above circumstances,
The specific means for this purpose are: a safety lever provided at a position closer to the operator than the clutch lever so as to be able to swing up and down; an extension lever fixed to the end of the safety lever; a pin member that protrudes and can come into contact with and separate from the clutch lever; a tension spring that is attached in conjunction with the extending lever and urges the safety lever to a neutral position; and a tension spring that is connected to the clutch lever. and a spring member attached to the clutch lever, and when the safety lever is swung upward or downward by a predetermined distance from the neutral position, the clutch lever is actuated with the pin member in contact with the clutch lever. The clutch lever is moved from a position beyond the fulcrum to a position beyond the fulcrum, and when the clutch lever reaches the beyond the fulcrum position, the clutch lever is moved to a release position by the action of the spring member.

[Effect]

According to the above means, when switching the clutch lever from the operating position to the releasing position in an emergency, etc., the safety lever provided at a position closer to the operator than the clutch lever is swung upward or downward by a predetermined distance. This eliminates the need for the operator to extend his arm and directly operate the clutch lever, making it possible to carry out the above-mentioned switching operation very easily and at hand.

In this case, when the safety lever is swung upward or downward by a predetermined distance from the neutral position, the extending lever fixed to the end of the safety lever also oscillates, and accordingly, the extending lever is swung upward or downward from the neutral position. The pin member protruding from the release lever will move along a predetermined trajectory, but at this time, the pin member will move while in contact with the clutch lever, and as a result, it will not be in the operating position. The clutch lever is moved to a position beyond the fulcrum by the operation of the pin member. After the clutch lever reaches the fulcrum crossing position in this manner, the clutch lever is moved to the release position by the action of the spring member without any further rocking of the safety lever. Therefore, by only pivoting the safety lever a small amount upwards or downwards from the neutral position, the clutch lever can be moved significantly to completely switch from the activated position to the released position. Moreover, if the force applied to swing the safety lever is removed, the safety lever returns to the neutral position due to the action of the tension spring.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 to 6.

It should be noted that the same components as those in the prior art are given the same reference numerals and the explanation thereof will be omitted.

Clutch device 2 of transport vehicle 1 according to the embodiment of this invention
As shown in FIG. 1, the handle part 6 of the carrier 1 is equipped with a loading platform 4 at the front of the upper part of the traveling part 3, and a drive source 5 and a handle part 6 at the rear of the upper part.
As shown in FIG. 2, it is made up of a clutch lever section 7 and a safety lever section 8. The clutch lever section 7 has a clutch lever 11 and a clutch link receiver 12 fixed to a cylinder 10 fitted to a lever rotating shaft 9 fixed to the handle section 6, and a clutch link 13 is attached to the clutch link receiver 12. One end is fixed. The other end of this clutch link 13 is connected to a clutch 15 by a wire 14 or the like, and the clutch 15 is operated and released by switching the clutch lever 11.
When the clutch 15 is in the operating state, the clutch lever 11 is in the operating position A where it is tilted toward the direction of movement of the transport vehicle 1 and abuts against the locking plate 21, as shown in FIG. 3, and when the clutch 15 is in the released state, As shown in FIG. 6, the clutch lever 11 is in the release position B where it is tilted in the direction opposite to the traveling direction of the carrier vehicle 1 and abuts against the locking plate 21. Further, the clutch 15 is connected to a tension spring (spring member) 16 attached to the fixed end, and the action of the tension spring 16 causes the clutch lever 11 to be slightly shifted from the operating position A as shown in FIGS. 4 and 5. It is designed to switch to the release position B simply by applying a force to the fulcrum crossing position C shown in FIG. The safety lever part 8 is constructed by rotatably fitting a safety lever 18 formed from a bar into a U-shape onto a shaft 17 provided on the handle part 6 on the rear side of the carrier 1 from the lever rotation shaft 9. An extending lever 20 having a protruding pin member 19 is fixed to one end of the safety lever 18. This extending lever 20 is connected to a tension spring 22 attached to a locking plate 21 provided on the handle portion 6, and the tension spring 22 always maintains the pin member 19 by the tension spring 22.
The safety lever 18 is moved to the front side of the clutch lever 11 when it is in the operating position A, and the safety lever 18 is returned to the neutral position.

According to the clutch device 2 described above, as shown in FIG. 3, if the clutch lever 11 in the operating position A is grasped and force is applied to directly switch the clutch lever 11 to the release position B as shown in FIG. When the clutch 15 is released, the power of the drive source 5 is no longer transmitted to the traveling section 3, and the transport vehicle 1 naturally stops. On the other hand, when the clutch lever 11 is in the operating position A, the safety lever 18 in the neutral position is held down by applying force in the direction of the arrow X or the direction of the arrow Z, as shown in FIG. 4 or FIG. Then, the extending lever 20 rotates downward or upward using the shaft 17 as a fulcrum, pulling the tension spring 22, and the pin member 19 also moves while contacting the clutch lever 11, thereby moving the clutch lever 11 toward the arrow mark. Move in the Y direction to position C beyond the fulcrum. At this time, when the force applied to the safety lever 18 is removed, the tension spring 2 connected to the extension lever 20
The pin member 19 and the safety lever 18 return to their original positions by the spring force of 2, and by the action of the tension spring 16 connected to the clutch 15, as shown in FIG.
At the same time as the clutch 15 is released, the clutch lever 11 is switched to the release position B. In this way, by pressing the safety lever 18 from the neutral position in the direction of the arrow X or the direction of the arrow Y, the clutch lever 1 is indirectly
1 can also be switched from the activated position A to the released position B.

[Effect of idea]

As is clear from the above explanation, the safety lever is located close to the operator, and the clutch lever is switched and the clutch is released by swinging the safety lever upward or downward. To release the clutch, you can operate the safety lever and switch the clutch lever with just a slight movement of your hand, and even if the use of both hands is blocked by an obstacle, you can easily shift the safety lever with a part of your body. You can switch the clutch lever by operating .

[Brief explanation of the drawing]

1 to 6 show examples of this invention,
Fig. 1 is an overall schematic perspective view of the transport vehicle, Fig. 2 is a perspective view of the clutch device, Fig. 3 is a sectional view when the clutch is in the operating state, and Fig. 4 is a diagram showing the state when the clutch is in the released state. FIG. 5 is a sectional view of the state when the safety lever is pushed up, FIG. 6 is a sectional view of the state when the safety lever is pushed down, and FIG. 7 is a perspective view for explaining the conventional technology. DESCRIPTION OF SYMBOLS 1... Transport vehicle, 2... Clutch device, 3... Running part, 5... Drive source, 11... Clutch lever,
15...Clutch, 16...Spring member (tension spring), 18...Safety lever, 19...Pin member,
20...Extension lever, 22...Tension spring, A...
Operating position, B...release position, C...position beyond the fulcrum.

Claims (1)

[Scope of Claim for Utility Model Registration] A clutch device for a transport vehicle that operates and releases the clutch by switching a clutch lever provided on the handle of the transport vehicle to connect and disconnect a drive source and a running section, which comprises: a safety lever provided at a position close to the operator so as to be able to swing vertically; an extension lever fixed to an end of the safety lever; and a lever protruding from the extension lever and abutting against the clutch lever. , comprising a separable pin member, a tension spring attached in conjunction with the extension lever to urge the safety lever to a neutral position, and a spring member attached in conjunction with the clutch lever; When the safety lever is swung upward or downward by a predetermined distance from the neutral position, the clutch lever is moved from the operating position to a position beyond the fulcrum with the pin member in contact with the clutch lever; A clutch device for a transport vehicle, characterized in that when the clutch lever reaches a fulcrum crossing position, the clutch lever is moved to a release position by the action of the spring member.