JP4859704B2 - Cargo handling vehicle using lifting hook jig and operation method thereof - Google Patents

Description

  The present invention is applied to a forklift or the like provided with a hanging hook provided on a spreader other than a lock pin, and a cargo handling vehicle that suspends and conveys a container with a lock pin rotatably attached to the spreader, and operation of the cargo handling vehicle Regarding the method.

  Forklifts equipped with spreaders, for example, as disclosed in Patent Document 1 (Japanese Patent Laid-Open No. Sho 62-285896), use two or four elongated holes provided at four corners of a container, After the lock pin attached to the spreader is inserted into the long hole, the lock pin is rotated 90 ° by a driving device such as a hydraulic cylinder and the lock pin is hooked in the short side direction of the long hole to transport the container. Is configured to do.

  In such a spreader, when the lock pin is inserted into the elongated hole, the lower end portion of the landing pin arrives at the upper surface of the container, and the landing pin rises against the spring force of the return spring, By releasing the lock mechanism interposed between the pin and the lock pin, the lock pin can be rotated by 90 °, and the lock pin is hooked in the short side direction of the long hole of the container. .

Japanese Patent Laid-Open No. 62-285896

  In a forklift or the like having a suspension hook provided on a spreader other than the lock pin as described above, when the load handling operation by the lock pin device and the cargo handling operation by the suspension hook can be switched, usually, When the lock pin is in the locked state, it recognizes that it has a load and performs hydraulic and electric control of the vehicle body, so it would be a safety issue if you try to use the hanging hook without locking the lock pin Therefore, when suspending and transporting a container, etc., using a hanging hook from a normal loading / unloading operation using a lock pin, it is a cargo handling work that uses a hanging hook on the vehicle body before entering the transportation work. In order to recognize this, the spreader's landing pin is pushed up to the spreader side using a jig, and the lock pin is in a locked state in which cargo handling operation is possible. There is required.

  However, in a forklift or the like having a suspension hook provided on a spreader other than the lock pin, as disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 62-285896), the lock of the suspension hook device is disclosed. Pins are usually installed on the left and right sides of the vehicle in two places, one for each, or two places for a total of four places, so when switching from normal handling operation with lock pins to handling operation with suspension hooks Then, it is necessary to simultaneously push up two or four landing pins using a push-up jig so that each lock pin can be locked with a hanging hook.

  For this reason, in the conventional technique such as Patent Document 1, when switching from the normal loading / unloading operation by the lock pin to the loading / unloading operation by the hanging hook, or vice versa, the loading operation by the hanging hook is performed by the lock pin. When switching to the cargo handling operation, the same number (usually two or four) of workers as the number of lock pins and landing pins pushes up the landing pins of the spreader at the same time using the jig. It is necessary to perform an operation of pushing up from the position to the spreader side, and a great amount of work is required for switching between the cargo handling operation by the lock pin and the cargo handling operation by the hanging hook.

  In view of the problems of the prior art, the present invention simplifies the operation of switching between a normal cargo handling operation and a cargo handling operation with a suspension hook in a cargo handling vehicle provided with a suspension hook provided on a spreader other than the lock pin. Thus, it is an object of the present invention to provide a cargo handling vehicle and an operation method thereof that reduce the number of work steps for the switching operation.

The present invention achieves such an object, in a cargo handling vehicle having a container suspended by a lock pin rotatably attached to a spreader, and further provided with a hanging hook provided on a spreader other than the lock pin. And a suspension hook jig that allows the landing pin mounted on the spreader to be pushed in so that the lock pin can be shifted to a locked state before the cargo handling work by the suspension hook is started. A fixed portion that is inserted into one side of the opening formed in the lower portion; and a movable portion that is rotatably attached to the fixed portion and is inserted into the other side of the opening. When the movable part is inserted into the opening, the landing pin is pushed into the spreader side so that the lock pin can be switched to the locked state. .
In this invention, specifically, in a state where the fixed portion and the movable portion of the hanging hook jig are inserted into the opening and the landing pin is pushed into the spreader side, the hanging hook jig is It is preferable that the opening pin can be locked by the spring force of the return spring of the landing pin.

  Further, the invention relating to the operation method of the cargo handling vehicle using the hanging hook jig configured as described above, the container is suspended and transported by a plurality of lock pins rotatably attached to the spreader. A method for operating a cargo handling vehicle having a suspension hook provided on a spreader other than a lock pin, which can be inserted into one side of an opening formed in a lower portion of the spreader before the cargo handling operation by the suspension hook is started. A plurality of fixed parts, a movable part rotatably attached to the fixed part and insertable on the other side of the opening, and a landing pin pressing part capable of pushing the landing pin into the spreader side. Using a hanging hook jig, the fixed part and the movable part of one hanging hook jig are inserted into the opening of the spreader, and the landing pin pressing part pushes the landing pin to the spreader side. The lock pin can be switched to the locked state, and the hanging hook jig is locked to the opening by the spring force of the return spring of the landing pin, and the locked state is maintained. Then, using another hanging hook jig, the fixed portion and the movable portion of the hanging hook jig are inserted into the opening of the spreader, and the landing pin is pushed to the spreader side by the landing pin pressing portion. It is characterized in that the push-in lock pin can be switched to a locked state.

  In the present invention, it is preferable that the hanging hook jig is formed by cutting the plate portion of the fixing portion and connecting the insertion portion to the opening portion and the insertion portion. A grip portion to be gripped at the time of rotation and a landing pin pressing portion for pushing in the landing pin are integrally formed, and the movable portion is formed by cutting a plate material and inserting into the opening portion. A pin support portion connected to the fixed portion via a connection pin is integrally formed.

  According to the present invention, before starting the cargo handling operation by the hanging hook, the fixed portion and the movable portion of one hanging hook jig are inserted into the opening of the spreader by using a plurality of hanging hook jigs. Push the landing pin to the spreader side by the pin pressing part, make the lock pin switchable to the locked state, and lock the hanging hook jig to the opening by the spring force of the return spring of the landing pin, Since the above operation is performed using another hanging hook jig while maintaining such a locked state, a single worker operates the landing pin and the lock pin at one location to perform the above-described hanging hook treatment. While the equipment is attached, the landing pin is pushed in and the lock pin is locked to the hanging hook work, while the remaining landing pin is pushed in and the lock pin is locked to the hanging hook work sequentially. Possible

  Accordingly, the landing pin can be pushed in and the lock pin can be locked to the suspension hook operation with only a relatively simple work man-hour and using a relatively simple jig for the suspension hook. .

  In addition, the hanging hook jig is configured by connecting a holding portion formed by cutting a plate material and a fixed portion with a landing pin pressing portion and a movable portion formed by cutting the plate material via a connecting pin. Therefore, it can be manufactured by a very simple procedure and at a low cost, by cutting plate materials and combining or partially welding them.

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

4 is a schematic side view of a forklift or the like to which the present invention is applied, and FIG. 5 is a view taken along line AA in FIG.
4 to 5, a spreader 1 for lifting the container 7 is installed at a front portion of a forklift or the like indicated by reference numeral 5 so as to be movable up and down along the mast 6. As shown in FIG. 5, the spreader 1 is configured such that one or two each are attached to both ends of a frame 8 extending in the width direction of the vehicle, and a lock pin 4 is installed at the lower part of each spreader 1. Yes.
The present invention relates to a cargo handling vehicle using a hanging hook jig of a suspension hook device provided with such a spreader 1 and an operation method of the cargo handling vehicle.

1 is a side view of a main part of a hanging hook device in a forklift according to an embodiment of the present invention, FIG. 2 is a partial perspective view of a landing pin pressing portion of a hanging hook jig, and FIG. 3 is a perspective view of the hanging hook jig. FIG.
1 and 2, an opening 1 a recessed in a concave shape is formed at the end of the spreader 1, and a lock pin 4 is rotatably fitted at the center of the spreader 1. Further, a landing pin 2 and a return spring 3 are provided in a portion adjacent to the lock pin 4 of the spreader 1, and the return spring 3 urges the landing pin 2 to protrude downward. Yes.
The above configuration is the same as that of the prior art disclosed in Patent Document 1 and the like.

  As shown in FIG. 3, the hanging hook jig indicated by reference numeral 10 has a fixed portion 11 in which a substantially U-shaped insertion portion at the tip portion is formed, and a substantially U-shaped insertion portion at the end portion. And a movable portion 12 that is rotatably attached to the fixed portion 11 via a connecting pin 13 and is configured to be combined via the connecting pin 13. A landing pin pressing portion 15 that presses the landing pin is fixed to the upper surface side of the fixing portion 11 by welding. An operation grip 14 is formed on the opposite end of the fixed portion 11 to the U-shaped portion.

  As described above, the jig 10 for the hanging hook is formed by cutting the plate member into the fixing portion 11 and a U-shaped insertion portion into the opening 1a of the spreader 1 and a gripping portion coupled to the insertion portion. 14 and a landing pin pressing portion 15 for pushing the landing pin 2 are integrally formed, and the movable portion 12 is formed by cutting a plate material into a substantially U-shape to the opening 1a. And the pin support portion 12a connected to the fixed portion 11 via the connecting pin 13 are formed integrally, so that the plate material is cut and combined or partly welded. And can be manufactured at low cost. A suspension hook 20 provided on a spreader other than the lock pin is attached to a side portion above the opening 1a of the spreader 1 via a rotation shaft rotatably supported by a connecting pin. The cargo handling operation with the hanging hook 20 can be performed at an arbitrary position rotated in the direction.

Next, when switching from the normal cargo handling operation by the lock pin 4 to the cargo handling operation by the hanging hook using the hanging hook jig 10 configured as described above, the engine is operated and a spreader driving device (not shown) is used. The engine is stopped after moving the spreader 1 downward.
Next, as shown in FIG. 1, the fixing portion 11 of the hanging hook jig 10 is inserted into one side of the opening 1a of the spreader 1 and hooked on the upper surface of the flange 1b formed below the opening 1a. Then, as shown in FIG. 2, the upper surface of the landing pin pressing portion 15 is brought into contact with the lower end surface of the landing pin 2, and the gripping portion 14 is rotated in the direction of arrow A in FIG. The pin 2 is pushed into the spreader 1 side against the spring force of the return spring 3, and then the movable part 12 is rotated in the direction of the arrow B in FIG. The insertion part is inserted into the other side of the opening 1a of the spreader 1, and the worker releases his / her hand.

  Then, the insertion portion of the fixed portion 11 and the insertion portion of the movable portion 12 are pressed against the upper surface of the flange portion 1b of the spreader 1 by the spring force of the return spring 3 of the landing pin 2, and the operator hands Even if released, the hanging hook jig 10 is held in the opening 1a in a form in which the landing pin 2 is pushed in as shown in FIG.

When the attachment of the hanging hook jig to one landing pin 2 is completed by the above operation, the hanging hook jig 10 of the spreader 1 disengages the landing pin 2 even if the operator releases the hand as described above. Since it is held in the opening 1a in the pushed-in form, an operator can perform the same operation as described above on the next landing pin 2 using another hanging hook jig 10. Become.
When the hanging hook jigs are attached to all the landing pins 2, the engine is operated to lock the lock pins 4. Thereby, the cargo handling operation | movement with a hanging hook is attained. When the switching to the cargo handling operation position using the hanging hook is completed, the engine is stopped and the hanging hook jig 10 is removed.

  When returning from the loading / unloading operation position of the hanging hook device to the normal loading / unloading operation position using the lock pin as described above, all the landing pins 2 are pushed in using the hanging hook jig 10 as described above. Thereafter, the engine is operated, the lock pin 4 is unlocked, the engine is stopped, and the hanging hook jig 10 is removed.

  According to the above embodiment, before starting the cargo handling operation by the hanging hook device, the fixed portion 11 and the movable portion 12 of one hanging hook jig 10 are connected to the spreader 1 by using a plurality of hanging hook jigs 10. Inserting into the opening 1a, the landing pin pressing portion 15 pushes the landing pin 2 toward the spreader 1, the lock pin 4 can be switched to the locked state, and the hanging hook jig 10 is attached to the landing pin 2. It is possible to perform the above operation using another jig 10 for a hanging hook while keeping the locked state by holding the opening 1a by the spring force of the return spring 3 of one person. The operator operates the landing pin 2 and the lock pin 4 at one location and attaches the hanging hook jig 10 and pushes the landing pin 2 and locks the locking pin 4 to the hanging hook operation. Hold the rest Lock it is possible to sequentially perform a Suspended hook work Chakuyukapin second push and lock pin 4.

Thereby, the pushing of the landing pin 2 and the lock pin 4 can be performed only by using the jig 10 for the hanging hook having a relatively simple structure formed by combining the plate materials as described above and with a very small number of work steps. Locking work to the hanging hook work can be performed.
Note that the present invention is not limited to the forklift or the like, and can be widely applied to a cargo handling vehicle in which a container is suspended and transported by a lock pin rotatably attached to a spreader and further provided with a suspension hook.

  According to the present invention, in a cargo handling vehicle that performs a cargo handling operation using a suspension hook provided on a spreader other than the lock pin, the operation for switching between a normal cargo handling operation and a cargo handling operation in the suspension hook device is simplified, and It is possible to provide a cargo handling vehicle and an operation method thereof with reduced work man-hours for switching operation.

It is a principal part side view of the hanging hook apparatus in the forklift concerning the Example of this invention. It is a fragmentary perspective view of the landing pin press part of the jig | tool for hanging hooks in the said Example. It is a perspective view of the jig | tool for hanging hooks in the said Example. It is a fragmentary perspective view which shows the support structure of the axle part of an industrial vehicle provided with traveling functions and cargo handling functions, such as a forklift to which this invention is applied. It is a schematic side view of a forklift to which the present invention is applied. It is an AA arrow directional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spreader 1a Opening part 2 Grounding pin 3 Return spring 4 Lock pin 5 Forklift etc. 7 Container 10 Hanging hook jig 11 Fixed part 12 Movable part 13 Connecting pin 14 Grasping part 15 Landing pin pressing part 20 Hanging hook

Claims (4)

  In a cargo handling vehicle that hangs and transports containers with a lock pin that is pivotally attached to the spreader, when the cargo handling operation is performed with a suspension hook provided on the spreader other than the lock pin, the loader is attached to the spreader before the cargo handling operation is started. A hanging hook jig that allows the lock pin to be shifted to the locked state by pushing in the landing pin, and the hanging hook jig is inserted into one side of the opening formed in the lower part of the spreader. A fixed part and a movable part rotatably attached to the fixed part and inserted on the other side of the opening, and the landing when the fixed part and the movable part are inserted into the opening A cargo handling vehicle with a hanging hook jig, wherein the pin is pushed into a spreader side so that the lock pin can be switched to a locked state.   In the state where the fixed portion and the movable portion of the hanging hook jig are inserted into the opening and the landing pin is pushed into the spreader side, the hanging hook jig is moved as a spring of the return spring of the landing pin. The cargo handling vehicle with a hanging hook jig according to claim 1, wherein the vehicle can be locked to the opening by force.   The hanging hook jig includes: a fixing portion that is formed by cutting a plate material; an insertion portion into the opening; a gripping portion that is coupled to the insertion portion and grips when the hanging hook jig is rotated; A landing pin pressing portion for pushing the landing pin is formed integrally, and the movable portion is formed by cutting a plate material and connecting the insertion portion to the opening and the fixing portion via a connecting pin. 2. A cargo handling vehicle with a hanging hook jig according to claim 1, wherein the pin support portion to be connected is integrally formed.   A method of operating a cargo handling vehicle in which a container is suspended and transported by a plurality of lock pins rotatably attached to a spreader, and when the cargo handling work is performed by a suspension hook provided on a spreader other than the lock pins, Before starting work, a fixed part that can be inserted into one side of an opening formed in the lower part of the spreader, a movable part that is rotatably attached to the fixed part and can be inserted into the other side of the opening, and Using a plurality of hanging hook jigs provided with a landing pin pressing part capable of pushing the landing pin into the spreader side, the fixed part and the movable part of the one hanging hook jig are formed as openings of the spreader. The landing pin is pushed into the spreader side by the landing pin pressing portion so that the lock pin can be switched to the locked state, and the hanging hook jig is returned to the landing pin. It is locked to the opening by a spring force of the spring, and the locked state is maintained, and the fixed part and the movable part of the hanging hook jig are moved to each other by using another hanging hook jig. A cargo handling vehicle using a hanging hook jig, which is inserted into an opening of a spreader and pushes the landing pin toward the spreader by the landing pin pressing portion so that the lock pin can be switched to a locked state. How to operate.

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