JPH09151090A - Driver's seat guard lock structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate an automatic lock of a guard and automatic release of the lock by arranging a lock structure that a pin enters a pin hole when the guard is turned to a position to surround a driver's seat in the structure that a driver's seat guard is arranged so as to be tiltable to surround the driver' s seat to vertically move along a mast. SOLUTION: A driver's seat 4 of an order picker car has a head guard 5 above, a floor below and a front wall 7 in the front, and a driving operation device is arranged in the center of this front wall 7. Columns 9A are erected on both sides, and on both columns 9A, a driver's seat guard 11 having a U shape in a plan view is turnably installed around a rotary shaft 10A in an illustrated use position from an upper standby position so as to surround the driver's seat 4. In this case, a boss 12 is fixed to the rotary shaft 10A of an end part of the guard 11, on the one hand, a pin 16 which is energized upward by an action of a spring 14 and whose upper surface is pushed against the boss 12 and which holds this in a lock position, is arranged in the vicinity of a lower part of the boss 12 of the columns 9A, and the pin 16 can release a lock by operation of a lever 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary cab guard arranged on the cab of an order picker vehicle, which is fixed after the rotary cab guard is rotated to a position surrounding the cab by a complicated operation or a complicated operation. It is possible to automatically fix the cab guard with a simple mechanical structure without installing a device with a simple structure. The present invention relates to a driver's cab guard lock structure that prevents the fall of the vehicle.

[0002]

2. Description of the Related Art For example, as shown in FIGS. 18 to 20, a boss 31 attached to a first rotary shaft of a rotary cab guard.
, A hemispherical recess is provided, and a ball plunger 32 pressed upward by a spring is arranged on the driver's cab.
The cab guard lock structure is characterized in that when the cab guard 11 is rotated from above to a position surrounding the cab, the ball plunger 32 enters the recess of the boss 31. As a cab guard lock structure using such a ball plunger, when the cab guard is rotated to a position that surrounds the cab, it is automatically fixed, and when the operator releases the fixation, the operator cab The structure was such that the guard is automatically released by pulling it up.

[0003]

When a ball plunger is used to fix the driver's cab guard at a position surrounding the driver's cab as described above, the operator also moves the driver's cab guard upward as described above. It will be released by pulling it up, and the spring force that presses it above the ball plunger is weak, so the vibration of the order picker vehicle will shake the cab guard that should have been fixed greatly, and finally the ball plunger will move to the boss. Sometimes it came off the recess.

As a solution to this problem, the inventors have also tried to increase the spring force of the ball plunger. However, the shaking of the cab guard can be suppressed,
The operator needs a great deal of force to release the cab guard.

In order to solve the above problems, the inventor has conducted research and experiments, and as a result, the driver's cab guard can be automatically and reliably fixed with only a simple mechanical structure, and the driver can be released. We have invented and completed a driver's cab guard lock structure that does not require a great amount of force.

According to the present invention, when the driver's cab guard is rotated to a position surrounding the driver's cab, the driver's cab is automatically and surely fixed. To provide a cab guard lock mechanism that has a structure that can be released by pulling up the pedestal guard, surrounds the operator working on the cab, and reliably prevents the operator from falling from the cab. To aim.

[0007]

The first means of the present invention is as follows:
It consists of a car body, a mast, and a driver's cab that moves up and down along the mast, and the driver's cab is located in the front of the driver's cab. In an order picker vehicle provided with a platform guard, a boss attached to the first rotating shaft of the driver's cab guard is provided with a pin hole, and a pin provided with a lever is pressed to the upper portion of the boss by a spring and held, When rotating the cab guard from above to a position that surrounds the cab,
A driver's cab guard lock structure characterized in that the pin is retained in the pin hole.

A second means of the present invention is, in the order picker vehicle described above, a second rotary shaft near the first rotary shaft of the driver's cab, a substantially L-shaped plate provided on the second rotary shaft, and A spring for pressing the substantially L-shaped plate toward the front wall of the cab is provided, and when the cab guard is rotated from above to a position surrounding the cab, the substantially L-shaped plate is pressed against and held by the cab. It is a cab guard lock structure characterized by.

A third means of the present invention is, in the order picker vehicle described above, a first cam fixed coaxially with the first rotation axis of the driver's cab, and a rotation axis direction coaxial with the rotation axis 21. A second cam that meshes with the movable first cam, and a spring that presses the second cam in the first cam direction, and when the driver's cab guard is rotated from above to a position surrounding the driver's cab, The driver's cab guard lock structure is characterized in that the second cam is engaged and pressed to be held.

A fourth means of the present invention is, in the above-described order picker vehicle, a guard end portion which rotates around a first rotating shaft of a driver's cab and a third rotating shaft near the first rotating shaft of the driver's cab. , A hook that meshes with a guard end that rotates around the third rotation axis, a third cam that is fixed coaxially with the third rotation axis, and a third cam that is movable in the rotation axis direction coaxial with the third rotation axis When the driver's cab guard is rotated from above to a position surrounding the driver's cab, the third cam, the fourth cam, and the guard end are provided. The driver's cab guard lock structure is characterized in that the portion and the hook are engaged with each other and held.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Several embodiments of the present invention will be described below with reference to the drawings. In the figure, an order picker vehicle 1 includes a vehicle body 2, a mast 3 in the center of the vehicle body 2, and a driver's cab 4 that moves up and down along the mast 3 with an operator behind the vehicle body 2.

The driver's cab 4 of the order picker vehicle 1 in this embodiment has a head guard 5 on the upper side, a floor 6 on the lower side, a front wall 7 on the front, a front wall 7 has a driver operating device 8 at the center, and columns 9 at both ends.
A, 9B and columns 9A, 9B are provided with driver's cab guards 11 each having a rotatable first rotating shaft 10A, 10B on the inner surface.

The driver's cab guard 11 is normally housed upward along the rear surface of the front wall 7 and the lower surface of the head guard 5 so as not to hinder an operator from getting on or off the vehicle, and is fixed by a gas spring (not shown) or the like. Once the operator is on board, pull down the driver's cab guard 11 to enclose the operator and
It has a structure that can prevent workers from falling.

First, as a first embodiment, as shown in FIGS. 1 to 3, the boss 12 is fixed to the first rotary shaft 10A at the end of the cab guard 11. The boss 12 has an arcuate end and has a hole 13 at the end. The upper portion of the pillar 9A near the lower portion of the boss 12 has a trapezoidal shape, the spring 14 is arranged at the center, and the pin 16 having the lever 15 arranged at the lower portion presses the upper surface against the boss 12 by the action of the spring 14.
Install via 7.

With the above structure, when the cab guard 11 is pulled down from the upper position as shown in FIG. 3, the boss 12 rotates about the first rotary shaft 10A, and the cab guard 11 moves to the cab 4
When reaching the position surrounding the
The driver's cab guard 11 enters and enters a fixed state as shown in FIGS. 1 and 2. To release the lock, use lever 1
5 may be used to pull the pin 16 downward and the driver's cab guard 11 may be lifted lightly upward.

As a second embodiment, as shown in FIGS. 4 to 6, a second rotary shaft 18 is fixed near the first rotary shaft 10A at the end of the cab guard 11, and the second rotary shaft 18 is used as a center. The L-shaped plate 19 is installed in a state in which it is always pressed against the front wall 7 by the spring 20 fixed to the second rotating shaft 18.

In the above structure, if the cab guard 11 is pulled down from the upper position as shown in FIG. 6, when the cab guard 11 reaches the position surrounding the cab 4, the plate 19 is moved to the second rotary shaft 18. The driver's cab guard 11 is pressed against the front wall 7 around the center of the vehicle and is fixed as shown in FIGS. 4 and 5. To release the fixation, the plate 19 may be pulled toward the front of the operator and the driver's cab guard 11 may be lightly lifted upward.

As a third embodiment, as shown in FIGS. 7 to 10, a first cam 21 which rotates coaxially with the first rotating shaft 10A is fixed to the end of the driver's cab guard 11, and the first cam 21 is further coaxially attached. A second cam 22 that meshes with the cam 21 is installed on the front wall 7 via a bracket 23. The second cam 22 has an elliptical shape and is fitted in the bracket 23 in a non-rotatable state.
The spring 24 is always pressed against the first cam 21.

The cab guard 11 having the above structure is shown in FIG.
When the first cam 21 rotates coaxially with the first rotating shaft 10A as shown in FIG. 9, the second cam 22 is pushed inward toward the cab 4 and the cab guard 11 is pulled down.
7 reaches a position surrounding the cab 4, the second cam 22 meshes with the cab guard 11, and the cab guard 11 is fixed as shown in FIGS. 7 and 8. When releasing the fixation, the second cam 2
2 may be pulled toward the inner side of the cab 4 and the cab guard 11 may be lightly lifted upward.

As a fourth embodiment, as shown in FIGS. 11 to 15, the end of the driver's cab guard 11 is shaped like an L-shaped guard end 24 which rotates about the first rotary shaft 10A. Further, a hook 25 that meshes with the guard end 24 is installed near the lower part of the guard end 24 of the pillar 9A so as to be rotatable around a third rotation shaft 26. A third cam 27 that rotates coaxially with the third rotation shaft 26 is fixed to the hook 25, and the third cam 2 is further coaxially attached.
A fourth cam 28 that meshes with the 7 is installed on the front wall 7 via a bracket 29. The fourth cam 28 has an elliptical shape and is fitted into the bracket 29 in a non-rotatable state, and is constantly pressed by the spring 30 toward the third cam 27.

The cab guard 11 having the above structure is shown in FIG.
13 and 14 when pulled down from an upper position such as
As described above, the guard end portion 24 rotates about the first rotation shaft 10A, and the hook 25 rotates about the third rotation shaft 26. When the hook 25 rotates, the third cam 27 rotates coaxially with the third rotation shaft 26, and when the fourth cam 28 is pressed inward of the cab 4, the cab guard 11 reaches a position surrounding the cab 4. Further, the guard end 24 and the hook 25, the third cam 27 and the fourth cam 28 are engaged with each other, and the cab guard 11 is fixed as shown in FIGS. 11 and 12. To release the fixing, the fourth cam 28 may be pulled toward the inside of the cab 4 and the cab guard 11 may be lightly lifted upward.

In the above-mentioned four embodiments, only the column 9A and the first rotary shaft 10A are used for the execution. However, the same can be done by changing the columns 9B and the first rotary shaft 10B. It is also clear that a more reliable driver's cab guard lock mechanism can be obtained by implementing both of the above.

[0023]

As described above, the driver's cab guard locking device of the present invention has the above-mentioned configuration, so that by simply pulling down the driver's cab guard from above the driver's cab, the driver's cab guard is automatically placed at a position surrounding the driver's cab. Is fixed, and it does not shake even if vibration occurs in the order picker car, and the fixing does not come off. When releasing the lock, you can easily release it by pulling the lever. According to the present invention, the driver's cab guard can be securely fixed at a low cost only with a simple mechanical structure, and the operator can safely work on the order picker vehicle without falling from the driver's cab. It has become possible to provide a mechanism.

[Brief description of the drawings]

FIG. 1 is a side view showing a driver's cab guard locking device at a lower position of a driver's cab guard according to a first embodiment.

FIG. 2 is a rear view showing a driver's cab guard locking device at a lower position of the driver's cab guard according to the first embodiment.

FIG. 3 is a side view showing a cab guard locking device at a position above a cab guard in which the first embodiment is implemented.

FIG. 4 is a side view showing a cab guard locking device at a cab guard lower position in which a second embodiment is implemented.

FIG. 5 is a rear view showing a driver's cab guard locking device in a lower position of the driver's cab guard according to the second embodiment.

FIG. 6 is a side view showing a cab guard locking device at a position above the cab guard in which the second embodiment is implemented.

FIG. 7 is a side view showing a cab guard locking device in a cab guard lower position in which a third embodiment is implemented.

FIG. 8 is a rear view showing a driver's cab guard locking device at a lower position of the driver's cab guard according to the third embodiment.

FIG. 9 is a rear view showing a cab guard locking device at a cab guard intermediate position in which the third embodiment is implemented.

FIG. 10 is a side view showing a driver's cab guard lock device at a position above the driver's cab guard in which the third embodiment is implemented.

FIG. 11 is a side view showing a driver's cab guard lock device at a lower position of the driver's cab guard according to the fourth embodiment.

FIG. 12 is a rear view showing a driver's cab guard locking device at a lower position of the driver's cab guard according to the fourth embodiment.

FIG. 13 is a side view showing a cab guard locking device at a cab guard intermediate position according to a fourth embodiment.

FIG. 14 is a rear view showing a cab guard locking device at a cab guard intermediate position according to a fourth embodiment.

FIG. 15 is a side view showing a cab guard lock device at a position above the cab guard in which the fourth embodiment is implemented.

FIG. 16 is a perspective view showing an order picker vehicle that implements the present invention.

FIG. 17 is a perspective view showing an order picker vehicle in which a driver's cab guard is also added to a side surface.

FIG. 18 is a side view showing a conventional driver's cab guard locking device in a position below the driver's cab guard.

FIG. 19 is a rear view showing a conventional driver's cab guard locking device at a position above the driver's cab guard.

FIG. 20 is a side view showing a conventional cab guard locking device at a position above a cab guard.

[Explanation of symbols]

 1 order picker vehicle 2 vehicle body 3 mast 4 driver's cab 5 head guard 6 floor 7 front wall 8 driving operation device 9A pillar 9B pillar 10A first rotating shaft 10B first rotating shaft 11 driver's cab guard 12 boss 13 hole 14 spring 15 lever 16 pin 17 bracket 18 second rotary shaft 19 plate 20 spring 21 first cam 22 second cam 23 bracket 24 guard end 25 hook 26 third rotary shaft 27 third cam 28 fourth cam 29 bracket 30 spring 31 boss 32 ball Plunger

Claims (4)

[Claims] 1. A vehicle body, a mast, and a driver's cab that moves up and down along the mast on which a worker is placed. The driver's cab surrounds the operator's cab in a forward direction and a tiltable driver in the middle of the cab. In an order picker vehicle provided with a cab guard formed as described above, a boss attached to the first rotation shaft of the cab guard is provided with a pin hole, and a pin provided with a lever is provided at a lower portion of the boss by a spring. A cab guard lock structure characterized in that when the cab guard is pressed against and is rotated from above to a position surrounding the cab, the pin is retained in the pin hole. 2. The order picker vehicle according to claim 1, wherein a second rotating shaft is provided in the vicinity of the first rotating shaft of the cab guard, a substantially L-shaped plate provided on the second rotating shaft, and a substantially L-shaped plate. And a spring for pressing the cab toward the front wall of the cab, and when the cab guard is rotated from above to a position surrounding the cab, a substantially L-shaped plate is pressed against and held by the cab. Platform guard lock structure. 3. The order picker vehicle according to claim 1, wherein a first cam fixed coaxially with the first rotating shaft of the driver's cab guard, and a first cam movable coaxially with the first rotating shaft in the rotating shaft direction. A second cam that meshes with one cam and a spring that presses the second cam in the first cam direction are provided, and when the cab guard is rotated from above to a position that surrounds the cab, the first cam and the second cam are A driver's cab guard lock structure characterized by being pressed and held in mesh. 4. The order picker vehicle according to claim 1, wherein a guard end portion that rotates around the first rotation shaft of the cab guard, a third rotation shaft near the first rotation shaft of the cab, and a third rotation shaft. A hook that meshes with the guard end that rotates around the third cam, a third cam that is fixed coaxially with the third rotation shaft, and a fourth cam that meshes with the third cam that is coaxial with the third rotation shaft and movable in the rotation axis direction. , And a spring for pressing the fourth cam in the direction of the third cam, and when the driver's cab guard is rotated from above to a position surrounding the driver's cab, the third cam and the fourth cam, and the guard end and the hook mesh with each other. A driver's cab guard lock structure characterized by being pressed and held.