JPH11228092A - Forklift for empty container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forklift for an empty container capable of providing good work machine operability and a good forward visual range and facilitating empty container receiving side management. SOLUTION: A driver's seat 5 is provided almost in the center of a driving room 4, a handle column 7 having a steering wheel 6 is provided in its front side, spaces are formed in both left and right sides of the handle column 7 so as to reach the vicinity of a floor surface 8, and visibility is improved by enlarging a lower visual angle α. A control box 20 is provided in the side of the driver's seat 5, a joystick type work machine operation lever 30 capable of operating the work machine by one piece is disposed on the front of the upper surface thereof, an arm rest 40 is disposed in the rear side thereof, and by making the control box 20 and the armrest 40 movable, work machine operability is improved. A personal computer installation 50 for mounting a personal computer 51 for managing an empty container receiving side is provided in the control box 20, and thus management of the empty container receiving side is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an empty container forklift for suspending, transporting and stacking empty containers at a predetermined position.

[0002]

2. Description of the Related Art FIG. 10 shows a forklift 1 for empty containers.
It is an external appearance perspective view of. A tilt cylinder 10 is provided in front of a vehicle body 3 having a pair of front wheels 2a, 2a and rear wheels 2b, 2b.
The mast 11 is provided with a side spreader device 13 that can be moved up and down along the mast 11 by a lift cylinder 12. The side spreader device 13 can be shifted left and right by a side shift cylinder 14, so that fine adjustment of the left and right positions can be performed. On the left and right sides of the side spreader device 13, a pair of booms 15, 15 which are extendable and contractible in the width direction are attached, and spreaders 16, 15 provided at the left and right end portions thereof are provided.
A twist lock pin 17 that engages with the upper portion of the empty container is attached to the upper end of the container 16. When suspending an empty container, the boom 15 is extended and retracted in the lateral direction so that the distance between the twist lock pins 17 is adapted to both ends of the container having a length of 20 feet or 40 feet. Next, the twist lock pin 17 is inserted into the hole provided on the upper surface of the container, and is rotated by 90 ° to lock the engagement portion with the container. The lock is released by rotating the twist lock pin 17 by 90 ° in the reverse direction.

FIG. 11 is a side view showing an example of a cab 4 of a conventional empty container forklift, and FIG. 12 is a plan view. A driver's seat 5 is provided substantially at the center of the cab 4, and a steering column 7 having a steering handle 6 is provided in front of the driver's seat 5. A dashboard 90 is provided across the entire width in front of the cab 4 and below the steering column 7.
Is provided. On the right side of the handle column 7 of the dash boat 90, a lift operation lever 9 for operating a work machine is provided.
1. A tilt operation lever 92, a side shift operation lever 93, a twist lock operation lever 94, and a boom operation lever 95 are provided, and a headlight switch 96, a rear light switch 97, and the like are mounted on the left side. The view below the operator's viewpoint P is the upper end face of the dashboard 90, and the view angle is β.

The lift operation lever 91 is a lift cylinder 1
The tilt operation lever 92 controls the tilting of the mast 11 in the forward and backward directions by the expansion and contraction of the tilt cylinder 10, and the side shift operation lever 93.
Controls the lateral position of the side spreader device 13 by the expansion and contraction of the shift cylinder 14, and the twist lock operation lever 94 controls the locking and unlocking of the engagement portion with the container by the rotation of the twist lock pin 17, and the boom operation The lever 95 moves the boom 15 left and right to control the distance between the twist lock pins 17.

When moving an empty container, the operator operates the boom operation lever 95 to adjust the interval between the twist lock pins 17 to the width of the container. Next, the spreader 16 is set above the container by operating the lift operation lever 91. Next, the side shift operation lever 93 is operated to adjust the lateral position of the side spreader device 13 so that the twist lock pin 16 is adapted to the hole position on the upper surface of the container, and is inserted. Next, twist lock operation lever 9
4 is operated to rotate the twist lock pin 17 by 90 ° to lock. Next, the lift operation lever 91 is operated to raise the boom 15, and the container is moved 20 to 30 cm from the ground.
Position. Next, the tilt operation lever 92 is operated to transport the container to a predetermined position while keeping the container horizontal with the ground.

When stacking empty containers, the lift operation lever 91 is operated to lower the containers to a predetermined stacking position. Next, the tilt operation lever 92 is operated to make the mast 11 vertical. Next, the twist lock operation lever 94 is operated to rotate the twist lock pin 17 to release the lock. Next, the lifter lever 91 is operated to remove the sprayer 16 from the container.

[0007]

However, the above configuration has the following problems. (1) The number of operating machine levers is large, the operation is complicated, and the operator is tired. (2) The relative position between the working machine operating lever and the operator is constant, and depending on the physique of the operator, the position may be inappropriate and fatigue may increase. (3) The visibility in front and below is poor because of the dashboard. (4) The foot space of the operator is narrow due to the presence of the dashboard. (5) The transmission of the empty container to the receiving operator may not be clear, and the work efficiency may be poor.

The present invention focuses on the above problems, and makes it easy to operate the working machine, has good visibility in the front and below, has a large foot space, reduces operator fatigue, and clarifies the receiving destination of empty containers. It is an object of the present invention to provide an empty container forklift capable of transmitting information with good workability.

[0009]

In order to achieve the above object, in the first invention of the empty container forklift according to the present invention, a control for accommodating a working machine operating device near a driver's seat is provided. In an empty container forklift having a box and a work implement operation lever provided above the control box, the position of the work implement operation lever can be moved relative to a driver's seat.

[0010] According to the above configuration, the position of the working machine operation lever can be moved to the position where the operator can easily operate, and the fatigue of the operator can be reduced and workability can be improved.

According to a second aspect of the present invention, in the forklift for empty containers according to the first aspect of the present invention, the working machine operation lever swings back and forth to control the boom lift cylinder, and swings left and right to tilt the mast tilt cylinder. A twist lock control switch for locking the boom and the container in front of the upper surface of the lever knob, a boom open / close control switch for the rear, and a boom left side shift control for the left. The switch has a configuration in which a boom right side shift control switch is disposed on the right side.

[0012] According to the above configuration, the operator can hold the single working machine operating lever while lifting and lowering the boom, tilting the mast, locking the boom and the container, opening and closing the boom, and operating the left and right sides of the boom. Shift operation can be performed, operation is easy, fatigue is reduced, and workability is improved.

According to a third aspect of the present invention, in the forklift for empty containers according to the first or second aspect, the control box is located on a side of a driver's seat, and an armrest is provided behind a work implement operating lever provided above the control box. It is configured to be installed.

According to the above configuration, the operator can operate the work implement operation lever while the elbow is placed on the armrest, thereby reducing fatigue.

According to a fourth aspect of the present invention, in the forklift for empty containers according to the third aspect of the invention, the position of the armrest is movable with respect to the work equipment operation lever.

According to the above configuration, the operator can move the armrest to a position where the operator can easily operate the armrest with respect to the work implement operation lever, thereby greatly reducing fatigue.

According to a fifth aspect of the present invention, there is provided the empty container forklift according to the first to fourth aspects of the present invention, in which the left and right sides of the steering wheel column disposed in front of the driver's seat are arranged near the floor to improve the front visibility. Is provided.

According to the above configuration, there are spaces on both the left and right sides of the steering wheel column in front of the driver's seat near the floor, so that the visibility in the forward and downward directions is improved, the driving operability is improved, and the operator is improved. The space at the foot of the person is widened, and the livability is improved.

According to a sixth aspect of the present invention, there is provided an empty container forklift having a control box for storing a working machine operating device near a driver's seat and a working machine operating lever provided above the control box. It is configured to have a personal computer installation base on which a personal computer for managing empty container reception destinations is installed.

According to the above configuration, it is possible to install a personal computer for managing the empty container receiving place near the driver's seat, and the operator can quickly and accurately confirm the empty container receiving place. Significantly improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an empty container forklift according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a side view of the cab 4, FIG. 2 is a plan view, and FIG. 3 is a front view. 1, 2, and 3, a driver's seat 5 is disposed substantially at the center of the cab 4, and a steering column 7 having a steering handle 6 is disposed in front of the driver's seat 5. A control box 20 is disposed on the right side of the driver's seat 5, a work implement operation lever 30 is disposed on an upper surface and a front part thereof, and an armrest table 41 on which an armrest 40 is mounted is provided behind the control box operation lever 30. . Therefore, the operator can operate the work machine operation lever 30 by placing the elbow on the armrest 40, and the operation is easy and the fatigue is small. Spaces 54 and 55 reaching the floor 8 are provided on both left and right sides of the handle column 7. Therefore, the space under the operator's feet is large and the livability is good, and the downward viewing angle α from the viewpoint P is as shown in FIG.
Thus, the angle of view is larger than the conventional field of view β shown in FIG. On the outer surface of the control box 20, a personal computer base 50 for mounting the personal computer 51 is attached.
A display 52 and a keyboard 53 of a personal computer 51 for managing empty container reception destinations are mounted. The operator can quickly and accurately know the receiving destination of the empty container by using the personal computer 51, thereby speeding up the operation and improving the accuracy.

FIG. 4 is a plan view of the control box 20. A plurality of elongated holes 22 long in the front-rear direction are provided on a flange 21 provided at a lower end portion of the control box 20, and are fastened by bolts 24 to bolt holes 23 provided on the floor 8. Bolt hole 2
3 are provided at predetermined intervals in the front-rear direction and the left-right direction, and the position of the control box 20 can be adjusted in the front-rear direction and the left-right direction as shown by a thin two-dot chain line in FIGS. . Fine adjustment is possible in the front-rear direction by the elongated holes 22. Therefore, the position of the operating lever 30 for the working machine with respect to the driver's seat 5 can be adjusted to an optimum position for the operator.

FIG. 5 is a side view of the control box 20. An armrest 40 is fastened to a boss 42 fixed on an upper surface of an armrest table 41 provided on an upper surface of the control box 20 by a bolt 43. The thin two-dot chain line shows the armrest 40
1 shows a first embodiment of the position adjusting means, and the vertical position of the armrest 40 is determined by the boss 42 and the armrest 40.
It can be adjusted by interposing a spacer 44 between them. Therefore, the height of the armrest 40 with respect to the working machine operation lever 30 can be adjusted to an optimum position by adjusting the thickness of the spacer 44. Control box 2
A work machine operating device 24 (for example, a hydraulic direction switching control valve 33 or a fuse 25 for electrical equipment) is provided inside the work box 0, and can be easily removed by removing a lid 26 provided on a side surface of the control box 20. The maintenance is easy and the maintenance is good.

FIG. 6 is a perspective view of the working machine operating lever 30. The lever 31 of the working machine operation lever 30 is connected to a hydraulic direction switching control valve 33, and swings back and forth to extend and retract the lift cylinder 12 described in FIG. The joystick-type operation device controls the tilt angle of the mast 11 in the front-rear direction by expanding and contracting the tilt cylinder 10 by swinging in the left-right direction. Knob 3 attached to the tip of lever 31
2, a twist lock control switch 34
However, a boom opening / closing control switch 35 is provided at the rear, a left side shift control switch 36 is provided at the left, and a right side shift control switch 37 is provided at the right.

FIG. 7 is a hydraulic circuit diagram for operating the working machine.
In the figure, the control parts of the lift cylinder 12 and the tilt cylinder 10 by the direction switching control valve 33 are the same as those generally known, and therefore are omitted. Twist lock control, boom opening / closing control, left side shift control and right side shift control part Is shown only. The working machine hydraulic pump 61 is driven by the engine 60. A directional control valve 64 having a neutral (A) position and an operating (B) position on the discharge circuit 62 and the drain circuit 63 of the working machine hydraulic pump 61.
The twist lock control switch 34 (not shown) is provided on the first circuit 65 and the second circuit 66 on the downstream side thereof.
, A side-shift switching valve 80 connected to the left and right side shift control switches 36 and 37, and a boom opening / closing switching valve 85 connected to the boom opening / closing control switch 35 are arranged in parallel. .

The head side and the bottom side of the pair of twist lock cylinders 71, 71 are connected to the downstream side of the twist lock switching valve 70 by a head side circuit 72 and a bottom side circuit 73, respectively. The twist lock cylinder 71 rotates the twist lock pin 17 by expansion and contraction, locks when shortened, and unlocks when extended. The twist lock switching valve 70 has an unlocked (C) position, a neutral (D) position, and a locked (E) position. A first one-way valve 74a is interposed on the head-side circuit 72, and a second one-way valve 74b is interposed in the bottom-side circuit 73. The first one-way valve 74a includes a check valve 75 that flows only from the hydraulic pump 61 for the working machine, a spring 76 that biases the check valve 75 to the closing side, and a pilot circuit 77 that is connected to the bottom circuit 73. It is configured. Second one-way valve 74
Since b also has the same configuration as the first one-way valve 74a, the description is omitted.

The head side and the bottom side of the side shift cylinder 14 are connected to the downstream side of the side shift switching valve 80 by a head side circuit 81 and a bottom side circuit 82, respectively. The side shift switching valve 80 has a right shift (F) position, a neutral (G) position, and a left shift (H) position. A third one-way valve 74c is provided on the head side circuit 81.
The fourth one-way valve 74 is provided on the bottom circuit 82.
d is interposed. The third one-way valve 74c and the fourth one-way valve 74d have the same configuration as the first one-way valve 74a.
The downstream side of the boom opening / closing switching valve 85 is connected to a boom opening / closing hydraulic motor 86 that drives a pair of left and right booms 15 movable in the left / right direction. Boom opening / closing switching valve 8
Reference numeral 5 has a boom open (J) position, a neutral (K) position, and a boom closed (L) position.

Next, the operation will be described. Normally, the operator sets the direction switching valve 64 to the neutral (A) position. The pressure oil is supplied to the first one-way valve 7 via the twist lock switching valve 70.
Since the same pressure is applied to the head side and the bottom side of the twist lock cylinder 71 by opening the 4a and the second one-way valve 74b, the twist lock cylinder 71 is extended to enter the unlocked state. Similarly, the same pressure is applied to the bottom side and the head side of the side shift cylinder 14, so that the side shift cylinder 14 is extended to be in the right side shift state. The boom opening / closing hydraulic motor 86 is in a free state, and the boom is not opened / closed.

When operating the work machine, the operator switches the direction switching valve 64 to the operation (B) position, and connects the discharge circuit 62 of the work machine hydraulic pump 61 to the second circuit 66. When the twist lock control switch 34 is operated to set the twist lock switching valve 70 to the C position, the pressure oil opens the second one-way valve 74 b and is applied to the bottom side of the twist cylinder 71. At the same time, the pressure oil is applied from the pilot circuit 77 to the first one-way valve 74a to open the circuit and to open the twist cylinder 7
1 is connected to the drain circuit 63. Therefore, the twist cylinder 71 is extended and unlocked. When the twist lock switching valve 70 is set to the position E, the pressure oil is applied to the head side of the twist cylinder 71 to shorten and lock the twist cylinder 71. When the twist lock switching valve 70 is set to the D position, the upstream sides of the first one-way valve 74a and the second one-way valve 74b communicate with the drain circuit 63. Therefore, the check valve 75 is closed and the twist cylinder 71 is in the holding state.

When the boom opening / closing control switch 35 is operated to set the boom opening / closing switching valve 85 to the J position, the hydraulic oil rotates the boom opening / closing hydraulic motor 86 in one direction, opens the boom 15 in the left / right direction, and moves the spreader 16 between the spreaders 16. To 40 feet. When the boom open / close switching valve 85 is set to the L position, the hydraulic motor rotates in the opposite direction, closing the boom 15 and setting the interval between the spreaders 16 to 20 feet.

When the left side shift control switch 36 is operated, the side shift switching valve 80 is set to the H position, and the pressure oil opens the third one-way valve 74c to open the side shift cylinder 14
And moves the boom 15 to the left.
When the right side shift control switch 37 is operated, the side shift switching valve 80 is set to the F position, and the pressure oil is applied to the bottom side of the side shift cylinder 14 to move the boom 15 to the right. Side left / right side shift control switch 3
When the operation of 6, 37 is stopped, the third and fourth one-way valves 74c,
74d is closed and the side shift cylinder 14 is held.

As described above, the operator can raise and lower the boom 15, tilt the mast 11, lock and unlock the twist lock pin 17, change the side shift of the boom 15, and change the interval between the booms 15 with a single work implement operating lever 30. Operation is possible, work machine operability is extremely good, and fatigue is small.

FIG. 8 shows a second embodiment of the height adjusting means of the armrest 40. FIG. 8 shows a box-shaped armrest table 41a having an armrest 40 mounted on its upper surface, two long holes 45, 45 provided on both sides on each side, and a bracket 47 fixed to the upper surface of the control box 20 fastened with bolts 47. It is what I wore. Thereby, the position of the armrest 40 in the vertical direction and the inclination in the front-back direction can be adjusted.

FIG. 9 shows a third embodiment of the height adjusting means of the armrest 40. As shown in FIG. A plurality of bolt holes 48 are provided on both side surfaces of the box-shaped armrest base 41b and fastened to the brackets 46 fixed on the upper surface of the control box 20 with bolts 47. The tilt can be adjusted.

[Brief description of the drawings]

FIG. 1 is a side view of a cab of an empty container forklift according to the present invention.

FIG. 2 is a plan view of a cab of the empty container forklift according to the present invention.

FIG. 3 is a front view of a cab of the empty container forklift according to the present invention.

FIG. 4 is a plan view of the control box of the present invention.

FIG. 5 is a side view of the control box of the present invention.

FIG. 6 is a perspective view of a working machine operation lever of the present invention.

FIG. 7 is a hydraulic circuit diagram for operating a working machine according to the present invention.

FIG. 8 is a perspective view showing a second embodiment of the armrest position adjusting means of the present invention.

FIG. 9 is a perspective view showing a third embodiment of the armrest position adjusting means of the present invention.

FIG. 10 is an external perspective view of an empty container forklift.

FIG. 11 is a side view of a cab of a conventional empty container forklift.

FIG. 12 is a plan view of a cab of a conventional empty container forklift.

[Explanation of symbols]

4 cab, 5 cab, 7 cab column, 8 cab
Floor surface, 14: Side shift cylinder, 20: Control box, 3
0 ... Work equipment operation lever, 32 ... Knob, 33 ... Direction switching control valve, 34 ... Twist lock control switch, 35 ... Boom opening / closing control switch, 36 ... Left side shift control switch, 37 ... Right side shift control switch, 40 ... Armrest, 41, 41a, 41b ... armrest table, 46
... Bracket, 50 ... PC stand, 54, 55 ... Space, 61 ... Work machine pump, 64 ... Direction switching valve, 70 ...
Twist lock switching valve, 71: Twist lock cylinder, 74a: First one-way valve, 74b: Second one-way valve, 7
4c: third one-way valve, 74d: fourth one-way valve, 80: side-shift switching valve, 85: boom opening / closing switching valve, 86
... Hydraulic motor for opening and closing the boom.

Claims (6)

[Claims] An empty space having a control box (20) for storing a working machine operating device near a driver's seat (5) and a working machine operating lever (30) provided above the control box (20). An empty container forklift, wherein the position of a work machine operation lever (30) is movable with respect to a driver's seat (5). 2. The forklift for empty containers according to claim 1, wherein the working machine operation lever (30) swings in the front-rear direction to control the boom lift cylinder (12) and swings in the left-right direction. Twist lock control comprising a lever (31) for controlling the mast tilt cylinder (10), and a lock control between the boom (15) and the container in front of the upper surface of the knob (32) of the lever (31). A switch (34), a boom opening / closing control switch (35) on the rear, a boom left side shift control switch (36) on the left, and a boom right side shift control switch (37) on the right. A forklift for empty containers. 3. The forklift for empty containers according to claim 1, wherein the control box (20) is located on a side of a driver's seat (5), and is provided on an upper part of the control box (20). An empty container forklift, wherein an armrest (40) is arranged behind the operation lever (30). 4. The empty container forklift according to claim 3, wherein the position of the armrest (40) is movable with respect to the operation lever (30) for the working machine. 5. The forklift for empty containers according to claim 1, wherein a driver's seat is provided for improving a front view.
(5) Steering handle column arranged in front
An empty container forklift characterized by providing spaces (54, 55) on both the left and right sides of (7) to the vicinity of the floor (8). 6. An empty box having a control box (20) for storing a working machine operating device near a driver's seat (5), and a working machine operating lever (30) provided above the control box (20). In a container forklift, a personal computer stand (50) equipped with a personal computer (51) for managing empty container receiving places near the driver's seat (5)
A forklift for empty containers, characterized in that: