JPH09309697A - Unloading attachment for forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save trouble and improve efficiency in unloading a load loaded on a load carrying platform of a container or truck. SOLUTION: An extensible device 6 is fitted on the front face of an ascendable and descendable carriage 3 of a forklift 1 through a side shift deviate 5, and a takeoff device 7 is mounted to the extensible device 6. Sideward hooks 9 are arranged longitudinally on the front face of the takeoff device 7 and are urged forward by springs. The takeoff device 7 is moved forward and is then slid leftward so that vinyl bands C tied around loads B are hooked with the hooks 9 to move the loads B in a row on a first transverse live roller conveyor 11. The loads B are then carried from the first live roller conveyor 11 through a second back and forth live roller conveyor 12 and an inclined belt conveyor 13 to a rear horizontal belt conveyor 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloading attachment for a forklift, and more particularly, to an unloading attachment for a forklift for unloading a load loaded on the bed of a container or a truck. is there.

[0002]

2. Description of the Related Art Most of the so-called unloading work of so-called bulky goods loaded on the bed of a container or a truck depends on manpower and requires a lot of labor and time. It is a heavy labor requiring labor, and labor saving and improvement in efficiency are demanded.

Further, there has been proposed a loading and unloading device in which a traveling carriage, a unloading arm, and a conveyor are combined, but these unloading and loading devices are dedicated bulk loading machines and cannot carry out pallet loading and unloading work with a fork. This can be a drawback. In other words, in general warehouses, various types of cargo are received in various loading forms such as bulk loading or pallet loading, so a dedicated bulk loading machine has low utility value in terms of cost, space, etc. Versatility that can handle both loading and unloading work is required.

Therefore, there arises a technical problem to be solved in order to provide an unloading device capable of handling both unloaded items and pallets, and the present invention aims to solve the above problems. To do.

[0005]

DISCLOSURE OF THE INVENTION The present invention is proposed in order to achieve the above-mentioned object, and a side shift device is attached to a carriage that moves up and down along a mast of a forklift, and a movable part of the side shift device is attached to the movable part. Provided is an attachment for unloading a forklift in which a front / rear expansion / contraction device is mounted and a load take-out device having a plurality of hooks, suction pads and the like arranged in parallel is detachably attached to a movable part of the front / rear expansion / contraction device.

Further, a first driving roller conveyor is mounted laterally on a fork projecting forward from the lower part of the carriage, and a front and rear direction connecting the front side surface to one end of the first driving roller conveyor. Two drive roller conveyors, an inclined belt conveyor pivotally attached to the rear portion of the second drive roller conveyor so as to be vertically rotatable, and a side surface rear portion of a forklift, which is pivotally attached and connected to the rear portion of the inclined belt conveyor. Of the forklift in which the first drive roller conveyor and the fork are provided with fixing means such as a set screw, and the first and second drive roller conveyors are detachable from the forklift. It provides an unloading attachment.

As the above-mentioned take-out device, a plurality of lateral hooks are arranged on the front surface of an arm that expands in the left-right direction so as to be slidable in the front-rear direction, and a spring is interposed between the hook and the arm. If a take-out device with the hook projecting forward is attached, the hook can be taken out by hooking the band on the luggage.

Further, a plurality of slide shafts are arranged in the left and right directions on the front surface of the arm that expands in the left and right direction, and are slidably inserted in the front and rear direction. A spring is interposed between the slide shaft and the arm, and the slide shaft is mounted. If a pickup device is attached to the front end of the slide shaft, the pickup device is attached to the front end of the slide shaft.

Further, an arm that extends to the left and right and projects to the front is attached to the movable portion of the lifting device, and a plurality of slide shafts are arranged on the lower surface of the arm so that the slide shaft is vertically slidably inserted and attached. By mounting a take-out device in which the slide shaft is projected downward by interposing a spring between the shaft and the arm and a vacuum suction pad is attached to the lower end of the slide shaft, the vacuum suction pad is sucked onto the upper surface of the luggage. With the lifting device, the luggage can be lifted and taken out.

Further, the left and right are deployed to the movable part of the lifting device,
Further, an arm protruding forward is attached, a friction roller is axially attached to the arm in the left-right direction, a rotary drive device is interposed in the friction roller, and the arm is moved vertically in front of the friction roller. If a possible downward hook is attached and the take-out device is provided so that the load can be pulled out by the friction roller and the downward hook can be engaged with the back surface of the load, the friction roller can be brought into contact with the upper surface of the load to remove the friction roller. When the bag is rotated, the load is pulled toward you, the hook engages with the back surface of the load, and the load can be taken out.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 and 2, A is a container or truck bed, B is a plurality of loads loaded on the bed A, and a bag B is individually wrapped with a vinyl band C. A pair of forks 4 is attached to the left and right lower end portions of a carriage 3 that can be raised and lowered along a mast 2 of a forklift 1 on a loading platform A, and a side shift device 5 including a linear guide rail in the left and right direction and a hydraulic cylinder is mounted on the front surface of the carriage 3. The pantograph type expansion / contraction device 6 is attached via the. At the front part of the pantograph-type telescopic device 6, a baggage take-out device 7 is horizontally mounted in the left-right direction. Can be translated. The take-out device 7 can be replaced with another take-out device if necessary.

As shown in FIGS. 2 and 3, the take-out device 7
On the front surface of the arm 8, a plurality of lateral hooks 9 are arranged in the upper and lower two stages at regular intervals in the longitudinal direction. Figure 4 (a)
As shown in FIG. 5, the hook 9 is inserted into a hole formed in the front panel 8a of the arm 8 and the internal partition plate 8b, and the compression coil spring 10 is interposed between the spring receiving plate 9a fixed to the intermediate portion and the internal partition plate 8b. Is urged forward by. Therefore, the hook 9 is pushed into the arm 8 when a pressure equal to or higher than the spring force of the compression coil spring 10 is applied from the front side. Even if there is, the hook 9 does not move forward and backward as shown in FIGS. 4A and 4B, the contact pressure is limited to a constant value, and the luggage is not damaged.

As shown in FIGS. 1 and 2, a first drive roller conveyor 11 is mounted on the fork 4 laterally with respect to the traveling direction, and the left end of the first drive roller conveyor 11 is provided with a front and rear direction. Two drive roller conveyors 12 are arranged. An inclined belt conveyor 13 is pivotally attached to a rear portion of the second drive roller conveyor 12, and a rear portion of the inclined belt conveyor 13 is pivotally attached to a conveyor table 14a at a left rear portion of the forklift 1.
A horizontal belt conveyor 14 is arranged on 4a.

The first drive roller conveyor 11 and the second drive roller conveyor 12 ascend and descend together with the carriage 3, and the inclination angle of the inclined belt conveyor 13 changes as the height of the carriage 3 changes. Also, the carriage 3
With respect to the variation of the distance between the second drive roller conveyor 12 and the horizontal belt conveyor 14 due to the height of, the rear end of the inclined belt conveyor 13 moves back and forth on the conveyor table 14a, or As the structure in which the bracket part expands and contracts to some extent, it absorbs the variation in distance due to the inclination angle.

FIG. 5 shows a coupling mechanism of the first drive roller conveyor 11 and the fork 4, and the portal bridge 1 is provided on the lower surface of the front frame 11a of the first drive roller conveyor 11.
5, a bracket 16 extending downward is provided on the lower surface of the rear frame 11b at positions corresponding to the left and right side surfaces of the fork 4. Insert the tip of the fork 4 of the forklift 1 into the portal bridge 15 and attach the bracket 1
The vicinity of the base of the fork 4 is tightened and fixed from both left and right sides by bolts 17 inserted into the first and second drive roller conveyors 11 and 2
The drive roller conveyor 12 can be integrally attached and detached.

During the unloading work, first, the forklift 1 is advanced to position the first drive roller conveyor 11 in the immediate vicinity of the loaded cargo B and stop it, and then the carriage 3
To position the first drive roller conveyor 11 at the same level as or slightly below the bottom surface of the uppermost load B.

Subsequently, the pantograph type expansion / contraction device 6 is driven to move the take-out device 8 forward, and all hooks 9 are brought into contact with the front surface of the baggage B as shown in FIG. 6 (a). Then, as shown in FIG. 3B, the side shift device 5 is driven to slide the take-out device 8 to the left, and the hook 9 is hooked on the vinyl band C hung on the outside of the luggage B.

Next, as shown in FIG. 1C, the take-out device 8 is retracted by the pantograph type expansion / contraction device 6 to load the side-by-side loads B on the first drive roller conveyor 11 or the second drive roller conveyor 12. Pull up. Then, as shown in FIG. 3D, the side shift device 5 slides the pantograph-type expansion / contraction device 6 to the right to remove the hook 9 from the vinyl band C and to activate the conveyor. The load B on the second drive roller conveyor 12 is conveyed from the right to the left and is transferred onto the second drive roller conveyor 12.
Is conveyed to the rear via the inclined belt conveyor 13 to the rear.

The load reaching the front end of the horizontal belt conveyor 14 is manually stacked on a pallet D placed on the rear portion of the forklift 1, or another conveyor (not shown) is connected to the horizontal belt conveyor 14. And carry it out. The above operation is performed by operating the switch and the operation lever provided in the driver's seat of the forklift. The pantograph type expansion / contraction device may use the vertical pantograph type expansion / contraction device 18 shown in FIG. 7 in place of the horizontal pantograph type expansion / contraction device 6 shown in FIG.

The take-out device 19 shown in FIG.
The vacuum suction pad 21 is attached to the front end of the slide shaft that is arranged in the longitudinal direction on the front surface of and protrudes forward.
An expansion / contraction mechanism using a compression coil spring similar to the hook 9 of FIG. 4 described above is interposed, and the vacuum suction pad 21 is evenly pressed against the surface of the baggage B. The vacuum suction pad 21 is driven by a vacuum pump (not shown), and can suck the baggage B on which the vinyl band is not wound and pull it onto the first drive roller conveyor 11.

In the take-out device 22 shown in FIG. 9, an inverted L-shaped arm 24 is attached to a movable part of a lifting device 23 attached to a front part of a vertical pantograph type telescopic device 18, and a lower surface of a front protruding portion of the arm 24 is attached. Similarly to the take-out device 19 of FIG. 8, a plurality of vacuum suction pads 25 are arranged via an expansion / contraction mechanism using a compression coil spring.

As shown in FIG. 3A, the arm 24 is extended in the raised state, the vacuum suction pad 25 is positioned above the baggage B, and the arm 24 is lowered. After the vacuum suction pad 25 is brought into contact with the top surface of the baggage B and sucked, the baggage B is drawn onto the first drive roller conveyor 11 or the second drive roller conveyor 12 and carried out as shown in FIG.

In the take-out device 26 shown in FIG. 10, an arm 28 protruding forward is attached to an elevating part of an elevating device 27 attached to the front part of the vertical pantograph type telescopic device 18. A friction roller 29 made of a material having a high friction coefficient is rotatably attached to the front end portion of the arm 28, and the friction roller 29 is rotated by a rotation driving device (not shown). A lever 30 is pivotally mounted near the base of the arm 28, the tip of the lever 30 extends forward of the friction roller 28, and a hook 31 directed downward is provided at the tip. The lever 30 can be rotated upward from a horizontal posture parallel to the arm 28, and is urged downward by a spring 32 to stand still in parallel with the arm 28.

As shown in FIG. 10A, the lifting device 27
The unloading device 26 is extended upward with the friction roller 29 positioned above the baggage B, and the unloading device 26 is lowered, so that the friction roller 29 and the hook 31 are pulled up as shown in FIG. 10B. When the friction roller 29 is driven to rotate while being brought into contact with the top surface of the luggage B, the friction roller 29 pulls the luggage B toward the front side. Then, when the trailing edge of the luggage B moves toward the front of the hook 31, the hook 31 enters the back side of the luggage B, and the retractor 18 pulls the take-out device 26. It is transferred onto the drive roller conveyor 11 or the second drive roller conveyor 12.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the technical scope of the present invention, and it goes without saying that the present invention extends to those modifications. is there.

[0026]

As described above, the unloading attachment of the forklift truck according to the present invention allows unloading of the cargo on the container or the cargo bed of the truck by the driving operation in the driver's seat without any manual labor. It has a remarkable effect on labor saving and improvement of efficiency.

Further, if the conveyor for transferring the load taken out by the unloading device to the rear of the forklift is removed from the forklift, the work of loading the palletized load can be carried out, which is different from the conventional dedicated machine. It has the practicality of being able to handle a wide variety of cargo types.

[Brief description of drawings]

1 shows an embodiment of the invention according to claims 1 and 2,
The top view of a forklift.

2 shows an embodiment of the invention according to claims 1 and 2,
The side view of a forklift.

FIG. 3 is a plan view of the luggage unloading device according to claim 3;

FIG. 4 is a plan view showing a hook portion of the load take-out device according to a third aspect of the present invention, in which (a) is an extended state and (b) is a contracted state. .

5A and 5B show a coupling mechanism of a fork and a first drive roller conveyor, wherein FIG. 5A is a front view, FIG. 5B is a side view, and FIG. 5C is a view taken along the line AA of FIG.

6 (a), (b), (c) and (d) are claims 3 and 4, respectively.
It is process explanatory drawing which shows the effect | action of the taken-out apparatus of the package described.

FIG. 7 is a side view showing another embodiment of the expansion / contraction device.

FIG. 8 is a plan view of the luggage unloading device according to claim 4;

FIG. 9 shows a device for taking out a luggage according to claim 5,
(A) And (b) is process explanatory drawing which shows the effect | action, respectively.

FIG. 10 shows a device for taking out a load according to claim 6,
(A) (b) (c) is process explanatory drawing which shows the effect | action, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forklift 2 Mast 3 Carriage 4 Fork 5 Side shift device 6 Expansion / contraction device 7 Extraction device 8 Arm 9 Hook 10 Compression coil spring 11 First drive roller conveyor 12 Second drive roller conveyor 13 Inclined belt conveyor 14 Horizontal belt conveyor 19 Extraction device 20 arm 21 vacuum suction pad 22 take-out device 23 lifting device 24 arm 25 vacuum suction pad 26 take-out device 27 lifting device 28 arm 29 friction roller 30 lever 31 hook

Claims (6)

[Claims] Claims: 1. A side shift device is attached to a carriage that moves up and down along a mast of a forklift, and a front-rear expansion / contraction device is attached to a movable portion of the side shift device. Attachment for unloading a forklift that allows the device to be freely attached to and detached from the movable part of the front-rear telescopic device. 2. A side shift device is attached to a carriage that moves up and down along a mast of a forklift, and a front-rear expansion / contraction device is attached to a movable portion of the side shift device. A first drive roller conveyor mounted on the fork protruding forward from the lower part of the carriage, and a first drive roller conveyor, and one end of the first drive roller conveyor, the first drive roller conveyor being detachable from the movable part of the front-back telescopic device. A front and rear second drive roller conveyor connected to the front side surface of the second drive roller conveyor; a vertically rotatable tilt belt conveyor pivotally attached to the rear portion of the second drive roller conveyor; A horizontal belt conveyor pivotally connected to the rear of the inclined belt conveyor, and fixed to the first drive roller conveyor and the fork. An attachment for unloading a forklift in which a fixing means such as a female screw is provided and the first and second drive roller conveyors are detachable from the forklift. 3. The take-out device is arranged such that a plurality of lateral hooks are arranged on the front surface of an arm extending left and right so as to be slidable in the front-rear direction, and a spring is interposed between the hook and the arm. The attachment for unloading a forklift according to claim 1 or 2, which is a take-out device in which the hook is projected forward. 4. The take-out device is arranged such that a plurality of slide shafts are arranged left and right on a front surface of an arm that expands to the left and right so as to be slidable in the front-rear direction, and a spring is interposed between the slide shaft and the arm. The attachment for unloading a forklift according to claim 1 or 2, wherein the slide shaft is projected forward and a vacuum suction pad is attached to the tip of the slide shaft. 5. The above-mentioned take-out device is equipped with an arm that expands left and right and projects forward, at a movable part of a lifting device.
A plurality of slide shafts are arranged left and right on the lower surface of the arm and vertically slidably inserted, and a spring is interposed between the slide shaft and the arm to project the slide shaft downward. The attachment for unloading a forklift according to claim 1 or 2, which is a take-out device having a vacuum suction pad attached to a lower end thereof. 6. The take-out device is equipped with an arm that deploys left and right and projects forward to a movable part of a lifting device.
A friction roller is attached to the arm in the left-right direction, a rotation drive device is interposed in the friction roller, and a vertically movable downward hook that is located in front of the friction roller is attached to the arm. 3. The attachment for unloading a forklift according to claim 1 or 2, which is a take-out device in which a load is pulled out by a roller so that the downward hook can be engaged with a back surface of the load.