JP2004269237A - Forklift - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forklift excellent both in safety and easiness in getting on and off. <P>SOLUTION: In the forklift 1 provided with a mast 18 on a vehicle front to guide a fork 17 so as to vertically move, an operation stand 6 with an entrance 15 formed by opening a rear side and a right side continuing into the rear side of the vehicle is provided with a guard 16 in a shape of approximately quarter circular arc in the plane view entirely covering the entrance 15. Both ends of the guard 16 are respectively supported on the vehicle body 2 through a locking device 20 provided with a locking shaft 21 of a vertical shaft so as to be locked and released, and provided so that when any one end is released from the vehicle body 2, the guard 16 can be horizontally rotated around the locking shaft 21 at the other end. Accordingly an operator can get on and off the operation stand opening the guard 16 from any one side of the rear and right sides of the vehicle, and the driver can be protected for the rear and right sides of the vehicle by closing the guard 16 during operation. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a forklift provided with a cab on which an operator gets on and off.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a reach type forklift, a battery storage unit is provided at a front portion of a body frame, and a machine storage unit that stores a traveling device and the like and a driver's cab on which an operator stands are provided side by side at the rear portion. The rear of the cab and / or the side opposite to the machine storage section is opened as an entrance, and a guard may be provided at the entrance to protect the operator (see the following document).
[0003]
[Patent Document 1]
JP-A-10-67495 [Patent Document 2]
JP-A-8-188396 [Patent Document 3]
Japanese Patent Application Laid-Open No. Hei 8-268695
[Problems to be solved by the invention]
By the way, forklifts having guards that are attached to the sides and rear of the cab described in the above-mentioned literature are excellent in getting on and off because they can get on and off by selecting either side or rear. When one of them is closed, the other is opened, which is disadvantageous in terms of safety. On the other hand, a forklift having a guard extending from the side to the rear of the driver's cab described in the above document is excellent in safety because the entrance / exit can be completely covered with the guard, but is a one-sided type and disadvantageous in terms of usability. .
[0005]
An object of the present invention is to provide a forklift excellent in both safety and getting on and off in consideration of these problems.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a forklift according to the present invention is a forklift having a mast for guiding a fork up and down in the front of a vehicle body. The driver's cab is formed with a guard that covers the entire entrance and exit, and both ends of the guard are detachably supported by the vehicle body via a locking device having a locking shaft that is a vertical axis. When one of the ends is detached from the vehicle body, the other end is provided so as to be horizontally rotatable around a locking shaft at the other end.
[0007]
According to this, the operator can release one end from the vehicle body and open and close the guard by pivoting the guard about the locking shaft at the other end, and the rear or one side (either the right side or the left side) of the vehicle body Can be freely selected to get on and off the cab. Moreover, by locking both ends of the guard to the vehicle body via the locking device, the guard can completely cover the entrance and exit, thereby completely preventing the operator's body from protruding from the cab while riding. Can be prevented. In the present invention, the guard may be formed to have a substantially L-shape in plan view or a substantially quarter-arc shape in plan view.
[0008]
The locking device includes a locking shaft fixed to one of a guard and a vehicle body, a receiving member fixed to the other side and rotatably receiving the locking shaft around an axis, and a receiving member formed by the receiving member. It is possible to adopt a configuration including a holding means for holding the stopped state, and an operating tool operated from the driver's cab and / or the outside of the vehicle against the holding force of the holding means for releasing the received state.
[0009]
In this configuration, when the locking shaft is provided so as to be movable between a predetermined pivotal position supported by the receiving member and a non-pivotal position where the support by the receiving member is released and escapes from the receiving member, As means, a locking position where the locking shaft received at the pivot position is advanced into the moving space and the locking shaft is restrained so as not to escape from the pivot position, and the locking shaft is retracted out of the moving space. A lock device is supported so as to be able to move forward and backward over a release position for releasing the locking shaft, and a biasing means such as a spring for biasing the lock device from the release position to the locking position. Can be. In this case, the operating tool may be configured to move the lock tool from the locked position to the release position by operating against the urging force of the urging means constituting the holding means.
[0010]
According to this configuration, when the urging means urges the locking member to the locking position, the locking shaft is restrained by the locking member at the pivotal support position and is supported by the receiving member. Since this state is maintained by the force, the guard is locked to the vehicle body. On the other hand, when the operating tool is operated against the urging force of the urging means to position the locking tool at the release position, the locking shaft can escape from the receiving member. Therefore, while the one end side of the guard keeps the receiving state by the locking device, the locking shaft at the other end can be released from the receiving member, so that the locking device at the other end is prevented. Without this, the rotation operation of the locking shaft on the one end side with respect to the receiving member becomes possible. Therefore, as long as only one of the locking devices at both ends of the guard is released, the guard can be rotated around the other locking shaft, and the guard can be opened and closed.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.
[0012]
As shown in FIG. 1, the forklift 1 is a reach-type forklift, and its body frame 2 has a lower frame 3, a battery storage unit 4 disposed on a front part thereof, and a left rear part of the lower frame 3. A machine storage section 5 is provided, and a driver stands on a driver's cab 6 provided on the right rear of the lower frame 3 to operate the forklift 1. A steering wheel 8 for steering a steering wheel 7 also serving as a driving wheel is disposed above the machine storage unit 5, a lift lever 9 for lift operation, a tilt lever 10 for tilt operation, a reach above the battery storage unit 4. A reach lever 11 for operation, an accelerator 12 for operating the traveling direction and traveling speed, and the like are arranged, and a brake pedal 14 is arranged on a floor 13 of the cab 6. The rear and right sides of the driver's cab 6 are formed so as to be fully opened as a doorway 15, and the doorway 15 is formed as a guard formed in an L-shape in plan view as shown in FIGS. 1 and 2. 16 makes it possible to close the entire surface. In FIG. 1, reference numeral 17 denotes a fork, reference numeral 18 denotes a mast, and reference numeral 19 denotes a reach carriage, all of which are arranged in front of the body frame 2 as shown. The fork 17 is guided by a mast 18 erected at the front of a reach carriage 19 so as to be able to move up and down, and the reach carriage 19 can move forward and backward in the front-rear direction of the body frame 2 together with the mast 18 and the fork 17. Has become.
[0013]
Now, as shown in FIG. 2 and FIG. 3, at an appropriate interval vertically above and below the right front edge of the guard 16 and the right front edge of the entrance 15, that is, the right rear corner of the battery housing 4. A locking device 20 as a locking device is provided, and a suitable space is also provided up and down over the left rear edge of the guard 16 and the right rear edge of the entrance 15, that is, the right rear corner of the machine housing 5. And a lock device 20 is provided. Here, the locking device 20 on the left rear side of the guard 16 is configured in the same manner as the locking device 20 on the right front side except that the right and left hand and the front and rear hand are reversed. Only the lock device 20 will be described in detail.
[0014]
FIGS. 4 and 5 show a lock device 20 provided over the right edge of the guard 16 and the right edge of the entrance 15, and the lock device 20 has a vertical axis fixed to the inner surface of the guard 16. The vehicle includes a pin 21 and a base 22 fixed to the inner surface of the right side plate 4a of the battery storage unit 4 and receiving the pin 21 at a predetermined pivot position. The pin 21 includes a pin body 21a and a mounting plate 21b for attaching the pin body 21 to the right front end of the guard 16, and the pin body 21a is formed in a U-shape that straddles the base 22 vertically in a side view. The mounting plate 21b protrudes from the inner surface of the guard 16 and is fixed to the guard 16 by a bolt inserted into the mounting plate 21b and a nut screwed to the bolt, preferably in a position-adjustable manner. Although not shown in the drawing, at least one of the upper and lower locking devices 20 is externally fitted with a washer on the longitudinal axis of the pin body 21a, and the washer is brought into contact with the base 22 from the upper side. The position is regulated in the 16 height direction.
[0015]
As shown in FIG. 5, the base 22 is composed of a horizontal plate 22a which is disposed at an appropriate interval vertically and a mounting plate 22b which connects right front portions of the horizontal plates 22a and is fixed to the right side plate 4a. The mounting plate 22b is implanted on the inner surface of the right side plate 4a of the battery storage unit 4, and the position of the mounting plate 22b is preferably adjustable on the right side plate 4a by a bolt inserted into the mounting plate 22b and a nut screwed to the bolt. Fixed to. However, the mounting plate 22b may be omitted, and the horizontal plate 22a may be fixed to the right side plate 4a by, for example, welding.
[0016]
Incidentally, the above-mentioned predetermined pivot position is a position which is determined in the opening and closing direction of the guard 16 shown by a dashed line A in FIG. 4 and also predetermined in a direction orthogonal to the opening and closing direction. In order to receive the longitudinal axis of the pin 21 at this pivotal position, a guide groove 22c is formed in each horizontal plate 22a of the base 22. The guide groove 22c is formed of an arc groove extending in the opening and closing direction from the outer edge of the vehicle to this pivotal position. The pin 21 can be located at a pivot position and a non-pivot position that has escaped from the base 22 by moving along the guide groove 22c. The pin 21 located at the pivotal position is guided by the inner peripheral surface of the guide groove 22c and is rotatable around the axis of the longitudinal axis of the pin body 21a. It will rotate around the axis of the longitudinal axis of 21a. In other words, the guard 16 and the pin 21 can be horizontally rotated about the axis of the longitudinal axis of the pin body 21a integrally. Such a pin 21 corresponds to a locking shaft in the present invention, and the base 22 corresponds to a receiving member.
[0017]
Further, the lock device 20 locks the lock 24 which is rotatably supported on the horizontal plate 22a of the base 22 around the longitudinal axis via the fulcrum pin 23, and biases the lock 24 from the release position to the locking position. An urging means 25 is provided. The lock member 24 includes a one-armed arm having a hook-shaped distal end. As shown in FIG. 5, the hook tip 24a has a movement space of the pin 21 received at the pivotal position, that is, the base 22. A locking position where the pin 21 is advanced into the plane projection of the guide groove 22c to restrain the pin 21 from the pivotal position to the outside of the vehicle so as not to escape, and a release position where the pin 21 is retracted outside the moving space to release the pin 21. Is supported by the base 22 so that it can advance and retreat. The urging means 25 can be formed of an elastic body such as a spring or rubber. In this embodiment, the urging means 25 is fitted around the fulcrum pin 23, and one end (or both ends) is attached to the horizontal plate 22a of the base 22 and the other end. A torsion spring composed of a helical spring whose part (or the central part) is locked by the lock member 24 is used as the urging means 25.
[0018]
As shown in FIG. 3, the lock members 24 of the upper and lower lock devices 20 are linked by a connecting member 26, and the release operation tool 27 is connected to the appropriate height between the upper and lower lock devices 20 via the connecting member 26. Fixed. The release operation tool 27 includes a driver's cab handle 27a operated from the driver's cab 6 and an external handle 27b operated from outside the vehicle. The driver's cab handle 27a and the external handle 27b are arranged at the same height. However, in this embodiment, the driver's cab handle 27a is fixed to the connecting member 26 at a height suitable for operation from the driver's cab 6, and the vehicle exterior handle 27b is fixed to the connecting member 26 at a height suitable for operation from outside the vehicle. I have. The right side plate 4a and the rear side plate 4b of the battery storage unit 4 have openings 28a and 28b into which a hand is inserted for operating the release operation tool 27. As shown in FIG. 4, the driver's cab handle 27a prevents the driver on the cab 6 from coming into contact, and the exterior handle 27b prevents other objects outside the vehicle from coming into contact with each other. For this purpose, both are arranged in the battery housing 4 and the cab handle 27a is urged by the urging means 25 to a position where it can be received by the stopper 29 fixed to the rear side plate 4b of the battery housing 4. ing.
[0019]
When the handle 27b for outside the vehicle is pulled out of the vehicle or the handle 27a for the driver's cab is pushed in from the driver's cab 6, the release operating tool 27, the connecting member 26 and the lock tool 24 are integrated into the urging means 25. The lock member 24 moves from the locked position to the released position, and the pin 21 can move from the pivot position to the outside of the vehicle. Then, from the state where the lock devices 20 on the right front side and the rear left side respectively hold the pin 21 at the pivotal support position, the lock device 20 is operated by operating one of the release operation tools 27 on the right front side or the rear left side. When the locked state by the lock device 20 is released, the guard 16 can be opened by rotating the guard 16 about the pin 21 of the other lock device 20. Here, the driver can freely select which one of the right front side and the left rear side of the lock device 20 is released, so that the guard 16 can be opened rightward or leftward as necessary. be able to.
[0020]
Therefore, for example, when getting on and off the driver's cab 6 in a passage having a narrow left and right width, the operator can operate the release operation tool 27 on the left rear side to get on and off from behind with the guard 16 opened. When the forklift 1 is parked by approaching the rear of the vehicle body, that is, the cab 6 to a wall of a warehouse or the like, the driver's cab is operated from the side with the guard 16 opened by operating the release operation tool 27 on the right front side. You can get on and off at 6.
[0021]
Further, when the forklift 1 is operated on the cab 6, the guard 16 is closed and the locking devices 20 hold the pins 21 at the pivotal positions, that is, the locking device 24 is in the locking position. When the pin 21 is positioned and the pin 21 is restrained so as not to escape from the pivotal position, the rotation of the one lock device 20 around the pin 21 is prevented by the other lock device 20, whereby The guard 16 can protect the rear and side of the operator with the guard 16 while the guard 16 closes the entrance 15.
[0022]
【The invention's effect】
As described above, according to the present invention, the guard completely covers the entrance and exit, thereby enhancing safety.In addition, one end is separated from the vehicle body and the guard is centered on the locking shaft at the other end. It can be opened and closed by rotating it, thereby obtaining an effect that the usability at the time of getting on and off the vehicle becomes very good.
[Brief description of the drawings]
FIG. 1 is a perspective view of a forklift to which the present invention is applied.
FIG. 2 is a plan view of the present invention.
FIG. 3 is a side view of the present invention.
FIG. 4 is a plan view of the present invention.
FIG. 5 is a perspective view of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Forklift 6 Driver's cab 15 Entrance / exit 16 Guard 20 Locking device 21 Pin 22 Base 24 Locking device 25 Biasing means 26 Connecting member 27 Release operating tool

Claims (2)

In a forklift equipped with a mast that guides a fork vertically to the front of the vehicle body,
A driver's cab in which the rear of the vehicle body and either one of the left and right sides connected to this is opened and the entrance is formed, a guard is provided to entirely cover the entrance,
Both ends of the guard are detachably supported on the vehicle body via locking devices having locking shafts each having a vertical axis, and when one end is separated from the vehicle body, the locking shaft at the other end is provided. A forklift, which is provided so as to be horizontally rotatable therearound. A locking shaft fixed to one of the guard and the vehicle body, a receiving member fixed to the other side and rotatably receiving the locking shaft around the axis, and a receiving state by the receiving member; 2. The holding device according to claim 1, further comprising: a holding unit configured to hold the vehicle, and an operating tool that is operated from outside the cab and / or outside the vehicle against the holding force of the holding unit to release the receiving state. 3. forklift.

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