JPH0881194A - Cargo handling gear for forklift truck - Google Patents

Abstract

PURPOSE: To store a cargo handling gear, which is installed in an outer mast and is mainly used in transferring work of a cargo to a pallet, in a position interfering with no fork work when it is not used. CONSTITUTION: A base plate 3 is installed horizontally turnably in one outer mast 1 via a swing pin 5, while in the other outer mast 1, a lock pin 6 is arranged so as to lock the turning usually. In a shifter 8 installed in the base plate 3 laterally movably, a base part of a telescopic arm provided with a vertically movable vacuum device D at the tip is installed horizontally turnably via a swing pin 24, and its rotation is usually stopped by means of the lock pin. Under a releasing condition of a lock based on two lock pins 6, the telescopic arm is turned by approximately 90 degrees, and the base plate 3 is turned by approximately 270 degrees, so that the whole of the cargo handling gear can be stored along a vehicle body side face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading / unloading device for a forklift, which is suitable for loading / unloading a container, mainly for loading / unloading a load in a container.

[0002]

2. Description of the Related Art In many cases, the work of unloading loads stacked in a container (often cardboard boxed products) involves loading a small forklift into the container, and a worker manually pallets the load of the container. We carry out unloading work in the form of transshipping to and then unloading.

An example of a cargo handling device for a forklift used for transshipment of stacked cargo onto a pallet in a factory or warehouse is, for example, Japanese Patent Laid-Open No. 62-1.
No. 41000 is known. In this structure, an upright column extending vertically is provided on a lift bracket, and an arm member horizontally projecting in the front-rear direction is vertically movable on the upright column, and a vacuum device is suspended and held on the arm member. The members are provided so as to be movable back and forth, and they are moved by a cylinder.
That is, the cargo handling device described in the publication is configured so that the vacuum device can be moved in the front-rear direction and the up-down direction by using the cylinder as a drive device.

[0004]

However, in the cargo handling apparatus described in the above publication, the cargo handling apparatus for transshipment of cargo is always located above the fork. That is, the cargo handling device is present at a position that interferes with normal fork work, and therefore, a forklift equipped with such a cargo handling device can only be used for loading and unloading of pallets, and is not versatile. There is.

The present invention has been made in view of the above problems, and it is an object of the present invention to store the fork in a storage position along the side surface of the vehicle body that does not interfere with the fork work when not in use. To provide a cargo handling device for a forklift.

[0006]

In order to solve the above problems, the present invention is configured as follows. That is, the present invention is a cargo handling device for a forklift, in which a horizontally long base member is arranged on the front surface of the left and right outer masts, and one side of the base member is horizontally rotatably attached to one outer mast via a swing pin. The base of the arm, which is attached to the front surface of the base member so as to be able to move laterally, is provided with a load lifting device that extends substantially horizontally forward and is vertically movable at the tip end through a swing pin. It is characterized by being mounted so that it can be rotated horizontally.

[0007]

The forklift cargo handling apparatus according to the present invention having the above-described structure is mainly used for loading and unloading work on pallets when in the use position. On the other hand, when the shifter is not used, the arm is horizontally rotated about 90 degrees, that is, the arm is horizontally folded, that is, folded over the front surface of the base member, and the base member is rotated about 270 degrees when the shifter is moved toward one outer mast side. By doing so, the entire cargo handling apparatus is displaced to the side of the vehicle body and stored along the side surface of the vehicle body. As a result, the cargo handling device is retracted from the front of the mast, and in this state, fork work by the fork is possible.

[0008]

As described above, according to the present invention, one forklift can be used not only for loading and unloading work on pallets but also for normal forkwork, so that the versatility of the forklift is enhanced and the equipment cost is reduced. It will be effective in planning. Further, as the cargo handling device for loading and unloading work is stored on the vehicle body side, the weight ratio on the vehicle body side increases, so that the lost load during fork work can be reduced and the allowable load can be increased.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 schematically show the entire cargo handling apparatus according to this embodiment. The cargo handling device is mainly used for the work of transposing the cargo W stacked in the container U onto the pallet P, and is a lateral movement device for horizontally moving the vacuum device D as a cargo lifting device in the left-right (vehicle width) direction. A, an arm extension / contraction device B mounted on a shifter 8 as a moving body of the lateral movement device A and horizontally moving the vacuum device D in the front-rear direction, and attached to the arm tip of the arm extension / contraction device B to move the vacuum device D up and down. Moving hoisting device C
And is attached to the fixed mast, that is, the upper end of the outer mast 1 so as to be located above the fork 2 in the forklift.

Each device will be described below individually. A lateral movement device A for horizontally moving the vacuum device D includes a base plate 3 as a base member arranged on the front surface of the mast, as shown in FIGS. The base plate 3 extends laterally to both sides of the left and right masts and is horizontally long with its surface direction being the vertical direction.
Both left and right sides thereof are attached to a bracket 4 fixed to the upper end of the outer mast 1 via two pins 5 and 6.

A pair of upper and lower horizontal guide rails 7 are provided on the front surface of the base plate 3 over substantially the entire width thereof, and a shifter 8 is attached to the guide rails 7 so as to be laterally movable via upper and lower slide metals 9. . In this embodiment, as shown in FIG. 5, the upper slide metal 9 is slidable on the upper guide rail 7 by L-shaped engagement, and the lower slide metal 9 is concave and convex on the lower guide rail 7. Although the sliding type by the slide metal 9 is shown, the sliding type by the slide metal 9 may be changed to a rolling type using a roller.

Further, as shown in FIGS. 3 and 4, a hydraulic cylinder 10 for moving a shifter as a driving device is attached to the front surface of the base plate 3 with its axial direction being horizontal, and the piston of the hydraulic cylinder 10 is mounted. A pinion 11 is rotatably attached to the tip of the rod 10a. A horizontal fixed rack 12 fixed to the base plate 3 and a horizontal movable rack 13 provided on the shifter 8 are meshed with the pinion 11 so as to sandwich it from above and below. Therefore, when the hydraulic cylinder 10 is expanded and contracted, the shifter 8 is moved together with the movable rack 13 in a stroke twice as long as the cylinder stroke, as shown by an imaginary line in the figure.

Next, an arm expansion / contraction device B for moving the vacuum device D back and forth will be described mainly with reference to FIGS. The arm expansion / contraction device B according to the present embodiment uses a hydraulic cylinder to increase the movement of the vacuum device D to a large stroke required for cargo handling work, and also to reduce the size and size of the device. Is configured as follows. The arm expanding / contracting device B is composed mainly of an expanding / contracting arm 17 composed of a plurality of (four in the present embodiment is shown) cylindrical bodies which are fitted to each other and have a rectangular cross-section. It is attached to the shifter 8 and extends horizontally in front of the vehicle. For convenience of explanation, the mounting structure of the arm expansion / contraction device B to the shifter 8 will be described later.

As shown in FIGS. 7 and 8, the telescopic arm 17 has a first arm 17a closest to the base portion fixed to the shifter 8, and a second arm 17b, a third arm 17c, and a fourth arm 17d in that order. It is slidably inserted. That is, the first arm 17a is a fixed arm, and the other second to fourth arms 17b to 17d are movable arms. In the present embodiment, the first arm 17a is the thickest, and the second to fourth arms are the first arm 1 at the time of the most reduction.
The arm lengths are set to be substantially equal to each other so as to be housed in each of the forks 2 and the extendable arm 17 at the time of the minimum contraction has a fork 2 whose entire length can be raised and lowered along the mast. Is set to be substantially equal in length.

Therefore, the telescopic arm 17 is constructed to be telescopic via the hydraulic cylinder 18 for arm extension and extension and the winding transmission mechanism. Specifically, as shown in FIG. 7, the hydraulic cylinder 18 is arranged in parallel to the outer lower surface of the telescopic arm 17, and the cylinder body is fixed to the lower surface of the first arm 17a on the base side via a bracket. Is connected to the lower surface of the second arm 17b on the front end side via a bracket. Therefore, when the hydraulic cylinder 18 is expanded and contracted, the second arm 17b is expanded and contracted with the same stroke as the hydraulic cylinder 18.

On the other hand, in order to move the third arm 17c, as shown in FIGS. 8 and 11 (A), the second arm 1
Sprockets 19a as rotating wheels are rotatably attached to both axial end portions of one side surface of 7b,
An endless chain 20a as a winding member mounted on this
Are connected to the base side of the third arm 17c and the tip side of the first arm 17a via brackets 21a. Therefore, when the second arm 17b is expanded / contracted, the third arm 17c is expanded / contracted with a double stroke in conjunction with this.

Similarly, in order to move the fourth arm 17d, as shown in FIGS. 8 and 11B, sprockets 19b as rotating wheels are respectively provided on both axial ends of one side of the third arm 17c. Endless chain 2 as a winding member mounted rotatably on the
0b is the base side of the fourth arm 17d and the second arm 17b.
Are connected to the tip end side of each of them via brackets 21b. Therefore, when the third arm 17c is expanded / contracted, the fourth arm 17d is expanded / contracted in a double stroke in conjunction with the expansion / contraction.

Thus, the third and fourth arms 17c,
17d is moved in conjunction with an adjacent arm via a winding transmission mechanism composed of sprockets 19a and 19b and endless chains 20a and 20b, respectively. Therefore, in the case of the four-stage telescopic structure of this embodiment, the total stroke of the telescopic arm 17 is a value obtained by multiplying the cylinder stroke by the number of movable arms, that is, three times the stroke of the hydraulic cylinder 18. That is, in this embodiment, the arm extension device B is configured to be reduced to the length of the first arm 17a which is a fixed arm at the time of the maximum reduction, and the vacuum device D is required for loading and unloading after achieving the overall compactness. It can be moved back and forth by increasing to a large stroke.

Therefore, the winding transmission mechanism is arranged by utilizing the gap between the arms as shown in FIGS. 8 and 9. That is, the endless chain 20 for the third arm 17c
“A” is arranged in the gap between the first arm 17a and the second arm 17b on the left side surface when viewed from the driver's seat, and the gap is set to be wide to realize this arrangement.
A sprocket 19a is rotatably supported on the left outer surface of the second arm 17b, and an endless chain 20a mounted on the sprocket 19a is connected to a bracket 21a fixed to the left inner surface of the first arm 17a on the tip side. In addition, the third arm 17c is connected to a bracket 21a fixed to the left outer surface of the third arm 17c on the base side.

The bracket 21 of the third arm 17c
a is a slit 2 formed on the left side plate of the second arm 17b
It penetrates 2a and protrudes in the clearance gap between the 2nd arm 17b and the 1st arm 17a, and this slit 22a is the bracket 2
It is formed horizontally in the longitudinal direction to allow the movement of 1a.

Further, the endless chain 20b for the fourth arm 17d is arranged in a clearance on the right side as viewed from the driver's seat among the clearances between the second arm 17b and the third arm 17c. In order to realize this arrangement, The gap is set wide. As in the case of the third arm 17c, the sprocket 19b is rotatably supported on the right outer side surface of the third arm 17c, and the endless chain 20b is hung on the sprocket 19b.
Is connected to the bracket 21b fixed to the right inner surface of the second arm 17b on the distal end side, and at the same time, is connected to the fourth arm 17b.
It is connected to a bracket 21b fixed to the outer right side of the base side of d.

The bracket 21 of the fourth arm 17d
In order to connect with the endless chain 20b, b extends through a slit 22b formed on the right side plate of the third arm 17c and projects into a gap between the third arm 17c and the second arm 17b, and this slit 22b of the bracket 21b. It is formed horizontally in the longitudinal direction to allow movement.

Furthermore, in order to obtain a smooth sliding action of each arm, a liner 23 that engages with each other is provided in the gap between the fitting surfaces of each arm, that is, the left and right side surfaces, the upper surface and the lower surface. The liners 23 are detachably fastened with screws (not shown) in consideration of replacement at the time of wear. Thus, the endless chains 20a and 20b and the sprocket 19 are
Since a and 19b are housed and arranged in the arm, they do not spoil the appearance and are protected from falling objects. Moreover, by adopting the arrangement configuration that utilizes the gap between the arms,
The entire arm retractor B is made compact.

Next, a hoisting device C for vertically moving the vacuum device D will be described mainly with reference to FIGS. In the hoisting device C according to the present embodiment, a hydraulic cylinder is used as a drive device, the vacuum device D is increased to a large stroke required for cargo handling and can be moved up and down, and then the device is made compact and compact. For that purpose, it is configured as follows. The hoisting device C is mainly composed of a hoisting transmission mechanism, and has a box 28 that extends horizontally in the front-rear direction to accommodate the hoisting device. The box 28 is arranged in parallel above the telescopic arm 17,
As shown in FIG. 1 or FIG. 7, the telescopic arm 17 at the minimum contraction
And has a length substantially the same as.

The box 28 is fixed to a mounting pedestal 29 on the upper surface of the front end of the fourth arm 17d via a bracket 28b fixed to the lower surface of the front end of the box 28. Opening 28a
It has. The box 28 is the fourth arm 17d.
Since it is integrally moved in the front-back direction with the first to third arms 17a, 17b, 17c, a notch 30 for avoiding interference with the bracket 28b when the arm is contracted is set over a required range. ing.

As shown in FIGS. 12 to 14, a hydraulic cylinder 31 as a driving device is arranged in the front side of the box 28 with its axial direction in the front-rear direction, and the cylinder body is interposed by a bracket. The pinion 32 is rotatably attached to the tip of the piston rod 31a. The pinion 32 includes a fixed rack 33 and a movable rack 3 which are parallel to the hydraulic cylinder 31.
4 are engaged so that they are sandwiched from above and below.

The fixed rack 33 is fixed to the inside lower surface of the box 28 via a bracket 35, and the movable rack 34 is attached to the inside upper surface of the box 28 via a linear guide 36 so as to be movable in the front-rear direction. It is fixed at 37. The sprocket holder 37 is arranged near the back of the box 28. Therefore, when the hydraulic cylinder 31 is expanded and contracted, the sprocket holder 37 is moved together with the movable rack 34 in a stroke twice the cylinder stroke.

Further, as shown in FIGS. 13 and 14, a plurality of sprocket holders 37 are provided.
A movable sprocket 38a as the third three movable wheels,
38b and 38c are rotatably attached. The hoisting chain 40 used as a hoisting member for hoisting the vacuum device D has one end connected to the box 28 side, and is rotatably attached to the front of the box 28 from the first movable sprocket 38a. After being wound around the fixed first sprocket 39a, the second movable sprocket 38b and the third movable sprocket 38c are sequentially wound and extend forward, and rotate near the opening 28a at the front end of the box 28. It is wound around a second fixed sprocket 39b as a guide wheel that is freely provided and is drawn out from the opening 28a to the lower side of the box 28,
A vacuum device D as a luggage pickup device is connected to the end portion thereof.

That is, in this embodiment, the fixed sprockets 39a and 39b and the movable sprockets 38a and 38 are used.
b, 38c and hoisting chain 40 wound around them
The winding transmission mechanism is configured by the
0 is meandered four times and wrapped around. Therefore, the vacuum device D hung by the hoisting chain 40 is moved to the stroke of the sprocket holder 37.
Value multiplied by the number of windings of the sprocket holder 37
The stroke is increased by 4 times the stroke of (4), and thus the stroke is increased by 8 times the stroke of the cylinder.

As described above, according to the hoisting device C of this embodiment, the vacuum device D is hoisted by increasing the cylinder stroke by the hoisting transmission mechanism utilizing the horizontal movement of the movable sprockets 38a, 38b, 38c. Therefore, the required stroke can be easily obtained by appropriately setting the meandering number of the hoisting chain 40 while achieving the compactness of the entire device. Further, since the hoisting transmission mechanism is housed in the box 28, it has a good appearance and is protected from falling objects and the like.

Next, the vacuum device D as a luggage pickup device will be described mainly with reference to FIG. The vacuum device D is composed of a substantially rectangular base plate 43 suspended by the hoisting chain 40, and six suction cups 44 arranged in two rows in this embodiment as a loading tool mounted on the lower surface of the base plate 43. It Each suction cup 44 is suspended by a hollow suspension rod 45 fixed to the substrate 43 so as to be vertically movable, and is pressed downward by a spring 46.

Each suspension rod 45 is connected to a vacuum generator or a vacuum pump (not shown) via a hose 47, so that the vacuum generation and its release can be controlled by the valve control of the pneumatic circuit. Has become. Further, a needle valve 48 for opening and closing the air passage is provided at the tip of each suspension rod 45, and the lower end portion of the needle valve 48 is projected from the suction surface of the suction cup 44 so that the suction valve 44 can be attached to the upper surface of the luggage. The passage is opened by being pushed by the upper surface of the load prior to the pushing.

By the way, the vacuum device D suspended by the hoisting chain 40 may swing in the front-rear direction when the arm is expanded or contracted to move horizontally or when the vehicle moves forward or backward. In order to prevent or suppress this, in this embodiment, a hoisting chain swing mechanism is provided. As shown in FIG. 16, this hoisting chain anti-sway mechanism regulates the bending of each chain component in one direction and the hoisting chain 40 as a whole to the second fixed sprocket 39b as the guide wheel of the hoisting device C. It regulates shake in the direction.

In order to control the bending of each chain constituent element, as shown in FIGS. 16 and 17 (and FIG. 14), each roller link plate 40a, which is a constituent element of the hoisting chain 40, is provided with a second member. L-shaped protrusion 40b protruding to the side opposite to the winding side with respect to the fixed sprocket 39b.
And a rectangular anti-vibration plate 49 is formed on the protrusion 40b.
Are fixed by bolts 50. That is, the anti-vibration plate 49 is set in a chain shape on the surface of the hoisting chain 40 opposite to the sprocket winding side,
Adjacent anti-vibration plates 49 abut their end surfaces 49a against each other to restrict bending of each roller link plate 40a in one direction, in the present embodiment, forward bending. The anti-vibration plate 49 is a vacuum device D.
It is set up to the vicinity of the first movable sprocket 38a where the winding direction of the hoisting chain 40 is changed starting from the connecting portion with the.

On the other hand, in order to regulate the runout of the entire chain,
As shown in FIG. 16, an anti-vibration cover 51 is attached to cover the front side of the opening 28a of the hoisting device C for opening and closing the chain of the box 28. The anti-vibration cover 51 is a vertically-oriented substantially groove-shaped cover that opens the surfaces other than the front surface and the left and right side surfaces, and the upper portions of both side surfaces are attached to the support shaft 52 of the second fixed sprocket 39a. The second fixed sprocket 3 is slidably contacted by the rear surface portion 51a, which is the opposite surface thereof, to the front surface of the anti-vibration plate 49 of the hoisting chain 40 that hangs down and hangs.
9A is restricted from swinging forward.

In this embodiment, in order to allow the turning of the vacuum device D, which will be described later, the anti-vibration cover 51 has the support shaft 5
It is mounted rotatably with respect to 2, and is always held in a swinging position by a lock pin 53. Lock pin 5
As shown in FIG. 16 and FIG. 18, the reference numeral 3 is horizontally movably mounted between the left and right cylindrical bodies 54 provided upright on the lower plate front end of the box 28, and is always accommodated in the cylindrical body 54. The spring 55 is pressed downward and urged. And
The anti-vibration cover 51 is locked at the initial anti-vibration position by engaging with the recess 56a of the substantially hook-shaped locking groove 56 formed in the lower side surface of the anti-vibration cover 51. Both ends of the lock pin 53 that fit into the tubular body 54 have a two-face width, and the two-face width portion 53 a is the slit 5 of the tubular body 54.
It is guided by 4a and moves in a stable posture.

The hoisting chain anti-vibration mechanism of the present embodiment thus constructed regulates the bending of the hoisting chain 40 components in one direction, and the second fixed sprocket 39a.
By preventing the swinging around, the swinging of the vacuum device D forward is prevented. Although the backward swing of the hoisting chain 40 is not regulated, the forward swing is prevented, and even if the hoist chain 40 swings backward, the swing ends in a single shot. That is, the repeated shake is prevented.

In general, the loads W stacked in the container U are stacked close to the ceiling of the container U in order to improve the packing efficiency. Therefore, it is practically impossible to suck the upper surface of the uppermost load W by the suction cup 44 of the vacuum device D. Therefore, in this embodiment, when the vacuum device D is wound up to the rising end, the suction surface of the suction cup 44 is turned so as to face forward. Less than,
FIG. 1 shows a loader turning mechanism that changes the direction of the suction cups 44.
This will be described with reference to FIG.

The loading tool turning mechanism has two guides, left and right, as reversing guide members rotatably mounted on the spindle 52 of the second fixed sprocket 39b of the hoisting device C so as to sandwich the sprocket 39b. It is composed of a roller 57 and two left and right reversing plates 58 as a reversing member provided on the side of the vacuum device D corresponding thereto. The reversing plate 58 is erected upright on the rear side of the connecting portion with the hoisting chain 40 on the upper surface of the base plate 43 of the vacuum device D, and has a V groove 58a on the upper end surface that is in contact with the outer peripheral surface of the guide roller 57. Is set. That is,
The guide roller 57 and the reversing plate 58 are below the shaft center of the second fixed sprocket 39b and behind the connecting portion of the hoisting chain 40 with the vacuum device D when the vacuum device D moves upward to the upper end. It is set to be able to contact.

When the vacuum device D is wound up to the ascending end, the V groove 58a at the upper end of the reversing plate 58 contacts the outer peripheral surface of the guide roller 57. Due to this abutment, a rotational moment due to the pulling force of the hoisting chain 40 acts on the vacuum device D around the shaft center of the guide roller 57, that is, around the shaft center of the second fixed sprocket 39b. Therefore, as shown in phantom lines in FIGS. 15 and 16, the vacuum device D is reversed so as to be flipped forward around the shaft center of the guide roller 57, and is attached to a stopper (not shown) provided at the front end of the box 28. As a result, the reversing movement is regulated and the posture becomes horizontal.

At this time, the rocking preventive cover 51 for preventing the swing of the vacuum device D is set to be released from the lock by the lock pin 53 and pushed by the hoisting chain 40 to follow forward. That is, a projection 59 for unlocking is provided on the rear surface of the lower portion of the reversing plate 58 so as to project rearward, and this projection 59 causes the lock pin 53 to be recessed 56a of the locking groove 56 of the vibration isolating cover 51 as shown by an imaginary line in the drawing. The anti-vibration cover 51 is unlocked because it is lifted from the spring 55 against the guide roller 5 together with the reversing plate 58.
It is rotated about the axis center of 7 and converted into a horizontal posture.

In this way, the vacuum device D is automatically turned to the horizontal posture with the suction surface of the suction cup 44 facing forward at the rising end, and at this time, the suction cup 44 can suction the rear surface of the load W. . Therefore, the box 28 of the hoisting device D
It is possible to take out the luggage at the same level as the above, that is, the uppermost luggage W stacked near the ceiling of the container U.

Further, the cargo handling apparatus for loading and unloading goods according to the present embodiment adopts a construction in which the fork work by the fork 2 is stored in a lateral position of the vehicle body so as not to interfere with the work when the cargo handling apparatus is not in use. ing. That is, FIG.
As shown in FIG. 10, the swing pin 24 is erected on the base of the telescopic arm 17 of the arm telescopic device B, that is, the upper surface of the base of the first arm 17a, through the pedestal 24a.
The swing pin 24 is rotatably fitted to a boss portion 8 a provided on the front surface of the shifter 8 of the lateral movement device A via a bush 25, and fixed by a lock nut 26.

Thus, the telescopic arm 17 is rotatably supported via the swing pin 24, and the lock hole 24b formed in the pedestal 24a of the swing pin 24 is always passed through the lock plate 8b protruding from the boss 8a. The rotation is blocked by the lock pin 27 inserted in the. Therefore, when the shifter 8 of the lateral movement device A is moved in one direction and the lock pin 27 is pulled up and turned about 90 degrees, the telescopic arm 17 is moved laterally as indicated by a virtual line X in FIG. It can be folded so as to overlap the front surface of A. The pedestal 24a of the swing pin 27 has 9
Another lock hole 24c for the storage position is set at a position shifted by 0 degree.

As shown in FIG. 4, the left and right pins 5 and 6 for attaching the base plate 3 of the lateral movement device A to the left and right brackets 4 fixed to the outer mast 1 are provided on one side (right side in this embodiment). As shown in FIG. 5, the pin 5 is a swing pin that rotatably supports the boss portion 3a of the base plate 3, and the other pin 6 is a lock pin for preventing rotation, as shown in FIG. The lock pin 6 is always inserted in the bracket 4 and the boss portion 3a of the base plate 3 to hold the base plate 3 in the initial position.

Therefore, when the lock pin 6 is pulled out at the time of storage and the base plate 3 of the lateral movement device A is turned about the swing pin 270 degrees by 270 degrees, the entire cargo handling device is moved to the front of the vehicle body as shown by a virtual line Y in FIG. To the side of the vehicle body. That is, when not in use, the cargo handling device is stored along the side surface of the vehicle body of the forklift with its longitudinal direction in the front-back direction, and its storage attitude is such that hooks (not shown) such as hooks provided at appropriate positions of the cargo handling device are mounted on the vehicle body side. For example, it can be held by being hooked on a locking portion provided on the head guard or its pillar.

The cargo handling apparatus according to this embodiment is configured as described above, and as shown in FIGS. 1 and 2, the cargo W stacked in the container U, mainly the corrugated cardboard boxes, is re-transferred onto the pallet P. It is used for work. The lateral movement device A, the arm expansion / contraction device B, the hoisting device C, which constitute the cargo handling device,
Each device such as the vacuum device D is remotely operated on the driver's seat of the forklift, and its operation mode is shown in FIGS.
Are respectively shown by phantom lines.

That is, the operation of moving the shifter hydraulic cylinder 10 of the lateral movement device A laterally along the guide rail 7 of the base plate 3 and the hydraulic cylinder for arm extension and contraction of the arm extending device B. 1
8 to extend and retract the telescopic arm 17 to extend and retract, and the hoisting device C to lift the baggage lifting device.
The vacuum device D is arbitrarily moved in three directions of the vehicle width direction, the front-back direction, and the up-down direction by performing the operation of expanding and contracting 1 to vertically move the hoisting chain 40 individually or in combination. , Sucker 44 of vacuum device D
By operating the adsorbing action and the releasing of the loads W by the above, the upper surfaces of the loads W stacked in the container C can be adsorbed and sequentially taken out and re-loaded on the pallet P.

According to the cargo handling apparatus of the present embodiment, the telescopic arm 17 can be telescopically moved with a stroke three times that of the hydraulic cylinder 18, as described above, and the hoisting chain 40 is hydraulically operated during the transshipment work of the cargo W. Cylinder 31
Since it can move up and down with a stroke of 8 times, it is possible to easily pick up a distant position of the load W or a high position of the load W and load it on the pallet P.

Further, in the case where the uppermost luggage W is fully loaded on the ceiling surface of the container U, if the hydraulic cylinder 31 of the hoisting device C is reduced to the full stroke, as described above. While the reversing plate 58 in the vacuum device D unlocks the anti-vibration cover 51,
After the V groove 58a comes into contact with the guide roller 57, the V groove 58a is turned forward around the axial center of the second fixed sprocket 39b, and the suction surface of the suction cup 44 is turned to a horizontal posture in which the suction surface faces forward.

Therefore, at this time, by appropriately expanding and contracting the expanding and contracting arm 17, the suction surface of the luggage W can be sucked by the suction cup 44 and then pulled out to the front side and taken out. That is, it is possible to take out the luggage W at the same level as the box 28 of the hoisting device C, that is, the uppermost luggage W stacked close to the ceiling of the container U. When the hoisting chain 40 is loosened after the load W is taken out, the vacuum device D is guided by the guide roller 57 by its own weight.
After being rotated downward together with the reversing plate 58 about the axis center of the vertical axis to return to the vertical position, the vertical position is lowered and the load W
Can be dropped onto the pallet P.

By the way, with respect to a highly loaded load W that exceeds the upper end of the outer mast 1, the vacuum device D can be lifted above the standard height to be handled by utilizing the rearward tilting motion of the mast. That is, as shown by the phantom line in FIG. 1, when the mast is tilted backward, the front end of the cargo handling device attached thereto is displaced upward, and at this time, the telescopic arm 17 should be extended to the maximum extent. Sucker 4
No. 4 is displaced to a considerably higher position from now on, with the height when the mast is upright as the standard height. Therefore, it is possible to deal with containers U having different ceiling heights.

Further, in the cargo handling device of this embodiment, since the swinging mechanism of the hoisting chain 40 is adopted, the vacuum device D is prevented from swinging, and the vacuum device D is used during the cargo handling work. Can be easily positioned, and the work of reloading the luggage W can be performed efficiently, and interference with peripheral members due to the shake of the vacuum device D when the vehicle is moved is prevented. The cargo handling apparatus of this embodiment is not limited to the work of transposing the cargo W of the container U onto the pallet P, but the reverse operation thereof, that is, the cargo W loaded on the pallet P.
It is needless to say that the present invention can be applied to the work of loading the container into the container U. As described above, according to the present embodiment, it is possible to provide a forklift cargo handling apparatus capable of efficiently and safely loading and unloading a cargo onto and from the container U.

When the cargo handling device is not in use, the lock pin 27 is first pulled out from the lock hole 24b to unlock the telescopic arm 17 in the state where the shifter 8 is moved to the right side, as described above. The telescopic arm 17 is swung about the boss portion 8a of the shifter 8 by about 90 degrees around the swing pin 24, and the telescopic arm 17 is overlapped and folded on the front surface of the base plate 3. Then, by inserting the lock pin 27 into the lock hole 24c for the storage position, the telescopic arm 17
Lock the storage position.

Then, after the lock pin 6 is pulled out to unlock the base plate 3, the base plate 3 is pivoted about the swing pin 5 by about 270 degrees to be displaced to the right side of the vehicle body and folded in parallel with the side surface of the vehicle body. Can be stored in the state. In this way, by retracting the cargo handling device from the front of the mast and storing it, the fork 2
It enables standard fork work using. That is, since the cargo handling device is attached to the outer mast 1, it does not participate in the lifting and lowering of the fork 2. It only displaces with respect to the tilt movement of the mast, and does not hinder the fork work. The return of the cargo handling device to the use position can be performed in the reverse order of the above.

As described above, according to this embodiment, the standard fork work using the fork 2 can be performed in addition to the transshipment work of the cargo W on the pallet P using the cargo handling device, and thus the forklift truck Versatility can be improved. Further, when the cargo handling device is stored on the side surface of the vehicle body, the weight ratio on the vehicle body side increases, so that there is an effect that the lost load during fork work is reduced and the allowable load can be increased.

Next, another embodiment of the present invention will be described with reference to FIGS. Another embodiment relates to powering when the cargo handling device is pivoted from the use position to the storage position or from the storage position to the use position. That is, FIG. 20 and FIG.
Relates to 270 degree turning of the entire cargo handling apparatus, that is, to turning the base plate 3, and in this embodiment, a hydraulic motor or an electric motor 65 is used as a drive unit. As shown in the figure, a motor 65 as a drive unit is fixed to the base plate 3 via a bracket 66, and a drive sprocket 67 driven by the motor 65 via a reduction gear (not shown) and the base plate 3. Swing pin 5 that rotatably supports the boss portion 3a
A chain 69 is attached to a fixed sprocket 68 fixed to the. The swing pin 5 is fixed to a bracket 4 fixed to the outer mast 1.

Therefore, according to this embodiment, when the drive sprocket 67 is rotated by rotating the motor 65 forward or backward, the chain 6 mounted on the fixed sprocket 68 is rotated.
The base plate 3 is rotated clockwise or counterclockwise around the swing pin 5 by the reaction force of the pulling force acting on 9. That is, the base plate 3 can be swung from the use position to the storage position or from the storage position to the use position.

22 and 23 show 90 of the telescopic arm 17.
In this embodiment, a hydraulic cylinder 70 is used as a drive device, and the telescopic arm 17 is rotated by a rack and pinion mechanism. Specifically, the hydraulic cylinder 70 is attached to the shifter 8 by the bracket 7
1 is mounted horizontally via the rack 1, which is connected to the tip of the piston rod 70a of the rack 72.
It engages with a pinion 73 provided on the swing pin 24. The swing pin 24 is rotatably supported by the boss 8a of the shifter 8. Therefore, according to this embodiment, when the hydraulic cylinder 70 is expanded and contracted to horizontally move the rack 72, the swing pin 24 is rotated clockwise or counterclockwise together with the pinion 70 to expand and contract the arm 17.
Is swiveled to the storage position or the use position.

As described above, according to another embodiment, by activating the turning operation of the cargo handling apparatus, the cargo handling apparatus can be stored or returned to the use position without getting off from the driver's seat one by one. It can free the staff from troublesome work.
Regarding the powering of the turning motion of the base plate 3,
The illustrated chain transmission mechanism can be implemented by changing to a worm gear device, or can be changed to a turning system by a rack and pinion using a hydraulic cylinder. On the other hand, regarding the powering of the swinging motion of the telescopic arm 17, similarly, it is possible to use a worm gear device or a winding transmission mechanism by using a hydraulic motor or an electric motor as a drive device.

When the worm gear device is used as the power transmission means and when the hydraulic cylinder is used as the drive device, this can also be used as the lock mechanism, which has the advantage of eliminating the need to separately set the lock mechanism.

The present invention is not limited to the illustrated embodiments, and various modifications can be made without departing from the spirit of the invention, and examples thereof are as follows. (1) After changing the base plate 3 as the base member in the lateral movement device A to a rod, the shifter 8 is added to this.
It may be changed to a configuration in which the slides through the linear guide. (2) Endless chains 20a, 2 as wrapping members used to extend and retract the telescopic arm 17 in the arm telescopic device B
0b and sprockets 19a and 19b as rotating wheels
May be replaced with ropes, belts and pulleys, respectively. (3) A winding member that constitutes a winding transmission mechanism in the hoisting device C, a movable wheel, a hoisting chain 40 as a fixed wheel, and sprockets 38a, 38b, 38c, 39a, 39b.
May be changed from chain type to rope type or belt type. (4) The displacement of the cargo handling device to the storage position and the return to the use position can be powered by using a hydraulic motor or an electric motor. (5) The transfer work of the load to the pallet P can be applied not only to the container U but also to factories, warehouses, and the like, and the load pickup tool is not limited to the suction method by the suction cup 44, and is handled. It can be appropriately set according to the type of load, and a hook, a clamp, an electromagnet or the like can be used.

[Brief description of drawings]

FIG. 1 is an overall side view showing a cargo handling device for a forklift according to an embodiment of the present invention.

FIG. 2 is an overall plan view of the same.

FIG. 3 is a front view showing a lateral movement device.

FIG. 4 is a plan view showing a lateral movement device.

5 is a sectional view taken along line GG of FIG.

6 is a cross-sectional view taken along line HH of FIG.

FIG. 7 is a side view showing an arm expanding / contracting device.

FIG. 8 is a partially cutaway plan sectional view of the arm expanding / contracting device.

FIG. 9 is a vertical cross-sectional view of the arm extension device.

10 is a cross-sectional view taken along line I-I of FIG.

FIG. 11 is a schematic view showing the extension / contraction operation of the extension / contraction arm,
(A) shows the operation of the second and third arms, and (B) shows the operation of the third and fourth arms.

FIG. 12 is a side sectional view showing a drive unit of the hoisting device.

FIG. 13 is a side sectional view showing a winding transmission mechanism of the hoisting device.

FIG. 14 is a vertical sectional view of the hoisting device.

FIG. 15 is a side view showing a vacuum device and its deflection mechanism.

FIG. 16 is a side view showing a swing-off mechanism of the hoisting chain.

FIG. 17 is a detailed view of an F portion in FIG.

18 is a cross-sectional view taken along the line JJ of FIG.

FIG. 19 is a plan view showing the storage configuration of the cargo handling device.

FIG. 20 is a side view showing another embodiment of the turning mechanism of the base plate.

FIG. 21 is a plan view of the same.

FIG. 22 is a front view showing another embodiment relating to the turning mechanism of the telescopic arm.

FIG. 23 is a plan view of the same.

[Explanation of symbols]

 A ... Lateral movement device B ... Arm extension device C ... Hoisting device D ... Vacuum device 1 ... Outer mast 2 ... Fork 3 ... Base plate 5 ... Swing pin 6 ... Lock pin 17 ... Telescopic arm 24 ... Swing pin 27 ... Lock pin

Claims (1)

[Claims] 1. A laterally long base member is disposed on the front surface of each of the left and right outer masts, and one side of the base member is horizontally rotatably mounted on one of the outer masts via a swing pin, while the lateral member is laterally mounted on the front surface of the base member. A forklift having a shifter mounted movably mounted on a base of an arm that extends substantially horizontally forward and has a load-lifting device that can move up and down at the tip so as to be horizontally rotatable via a swing pin. Cargo handling equipment.