JP2522827Y2 - Truck lift equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] In the present invention, a lift table is provided on the inner surface of a packing box, and the floor surface of the packing box is constituted by the lifting table when the lifting table is raised. In addition, the present invention relates to a lift device for a lorry having a handover plate rotatably mounted on a rear end of the lift table.

[Prior Art] Conventionally, as this type, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-168334, an opening is provided in the floor behind the packing box, and a lift table that can be raised and lowered is provided in this opening.
A pair of right and left four columns are respectively provided upright on the front and rear of the lift table, and guide rails are provided on the packing box side to guide the columns slidably. Each of the columns is hung by a chain extending over a pulley and a moving pulley, and the lift table is moved up and down along the guide rail by a cylinder via the chain. Also, at the rear end of the lift table, an inclined hand plate is rotatably provided so that a step between the lift table and the ground is eliminated when the lift table is in contact with the ground and the loading and unloading of the load on the lift table is facilitated. 2. Description of the Related Art A lift device for a mounted lorry has been proposed.

[Problem to be Solved by the Invention] In the above-described conventional technology, a lift table that can be moved up and down is arranged on the inner surface side of the packing box, and is arranged at the upper limit position of the lifting table and on the same plane as the floor surface of the packing box. Therefore, when loading the luggage in the packing box, etc., the lift table is raised to the floor level with the luggage loaded on the lift table and the luggage is stored in the packing box, but to the lift table When loading the luggage, it is necessary to rotate the luggage board to the lift table side after loading the luggage and store it.The luggage table needs a storage space when the luggage board is not used. Dead space due to the inability to load luggage into the space, not only not being able to effectively store luggage in the packing box, but also handing over luggage to and from the lift table The plate had to be turned to the lift table side, and there was a difficulty in operability.

Accordingly, an object of the present invention is to eliminate the dead space inside the packing box and increase the storage space inside the packing box, and to provide a lift device for a lorry that can easily operate the handover plate. .

Means for Solving the Problems According to the present invention, a cargo box is mounted on a chassis frame of a truck, a floor opening is formed at a rear end side of a floor surface of the cargo box, and the left and right chassis are formed. A lift table that opens and closes the floor opening through the space between the frames is provided so as to be able to move up and down, and the lift table closes the floor opening at its upper limit position so that the lift table and the floor surface of the packing box are the same. A lift device for a lorry, which is disposed on a plane, and at the time of touching the lift table, a transfer plate for eliminating a step between the lift table and the ground contact surface is rotatably supported at the rear end of the lift table. The transfer plate is provided with a resilient device for resiliently supporting the transfer plate separated from the grounding surface,
The transfer plate is protruded rearward from the lift table by the elastic device and is held substantially horizontally, and a rear end of the chassis frame is engaged with the transfer plate held by the elastic device. A protrusion is fixed at a position lower than the floor surface of the packing box, and when the lift table is raised, the engaging protrusion and the transfer plate are engaged at a position lower than the floor surface of the packing box. As the lift table moves upward from the engagement position between the abutment portion and the transfer plate to the floor, the transfer plate is turned downward against the elastic machine to move the transfer plate downward to the upper limit position of the lift table. The cross plate is held substantially vertically.

[Operation] When the lift table is raised by the above configuration and the lift table and the transfer plate provided at the rear end of the lift table are separated from the ground contact surface, the biasing force of the transfer plate and the dead weight of the transfer plate are balanced by the elastic machine. In this state, it is held almost horizontally in a slightly inclined state, and the transfer plate projects rearward from the lift table. Then, as the lift table rises, the handover plate and the engagement projections engage at a position slightly lower than the floor surface, and thereafter, when the lift table rises to the floor surface height, the handover plate moves upwardly of the lift table. As a result, the crossing plate is pushed downward by the engagement protrusion against the ram, and is held substantially vertically at the upper limit position of the lift table.
Further, when the lift table is lowered, the handover plate is rotated in the horizontal direction by the elastic machine, and protrudes from the lift table in a state of being disengaged from the engagement projection.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 to 5, reference numeral 1 denotes, for example, an aluminum van type packing box, which is provided with an opening 2 for loading and unloading luggage on a rear surface thereof, and an opening / closing door (not shown) is attached to the opening 2. . A floor opening 4 communicating with the opening 2 is formed near the rear of the floor 3 of the packing box 1. Also,
The packing box 1 is mounted on a front chassis frame 5 provided near the center of the vehicle body. The front chassis frame 5 supports the floor surface 3, and left and right side chassis frames 6 extend at the rear ends thereof.
The rear chassis frame 7, which is located on the outside, extends. Thereafter, a pair of grooves 8 through which a post to be described later can be inserted are formed opposite to each other on the rear inner side of the chassis frame 7, and a post is provided on the rear inner surface side of the packing box 1 so as to be connected to the groove 8. Guide rails 9 having a U-shaped flat cross section for slidably guiding are formed to face each other.

Reference numeral 10 denotes a lift table provided so as to be able to ascend and descend so as to close the floor opening 4, and since no chassis frame or the like is provided below the lift table 10, the lift table 10 can be lowered to the ground. , Lift table 10
In the upper limit position, the lift table 10 fits inside the floor opening 4 and the lift table 10 and the floor 3 of the packing box 1 are arranged on the same plane.
And are connected continuously. At the rear corner of the lift table 10, a pair of right and left columns 11 which are inserted into and guided by the grooves 8 and the guide rails 9 are erected, and the rattle of the columns 11 is suppressed in the guide rails 9 so as to be stable. A plurality of guide rollers 12 are provided so as to freely rotate.

Reference numeral 13 denotes a hydraulic cylinder provided above the inner surface of the guide rail 9. A piston rod 13 A of the cylinder 13 is fixedly mounted on the support column 11. It is configured to go up and down between. Also, a plurality of lock claws 14 having tapered surfaces 14A on the lower surface on both left and right sides of the lift table 10.
A lock body 16 is provided on the inner surface side of the rear chassis frame 7 and is slid horizontally by a lock cylinder 15. The lock body 16 has the same inclination as the tapered surface of the lock claw 14. A stopper 17 having a tapered surface 17A, which engages with the lock claw 14 and supports the lift table 10 when ascending, is provided. In this case, the lock cylinder 15 and the lock body 16 are provided between the lift table 10 and the rear chassis frame 7 so as not to hinder the lifting and lowering of the lift table 10. Guide plate 18 for guiding lock body 16
Has been fixed.

Reference numeral 19 denotes a handover plate attached to the rear end of the lift table 10, and a plurality of hinges provided on the lift table 10 and the handover plate 19.
The shaft 21 is inserted through the shafts 20, 20A so as to be rotatable. Further, a torsion spring 22 as an elastic machine is interposed between the hinges 20 and 20A on the shaft 21 via a collar 22A. One end of the torsion spring 22 is connected to the hinge on the lift table 10 side.
The other end is locked to the hinge 20A on the transfer plate 19 side so as to restrict the transfer plate 19 from rotating downward by its own weight when the lift table 10 is lifted. A recess 23 is provided at the rear of the lift table 10, and a wheel stopper 24 urged in a direction protruding from the recess 23 is provided so as to be able to protrude and retract.

Reference numeral 25 denotes an engaging projection provided on the rear chassis frame 7 of the packing box 1, which is configured by rotatably supporting a rotating roller 27 on a mounting frame 26 fixed to the rear chassis frame 7, and raising the lift table 10. As a result, the rotating roller 27 of the engaging projection 25 is engaged with the transfer plate 19 to rotate the transfer plate 19 downward against the torsion spring 22 in accordance with the lift of the lift table 10.

Next, the operation of the present invention configured as described above will be described in detail. First, to raise and lower the lift table 10, as shown in FIG.
Is moved forward, and in a state where the engagement between the lock claw 14 and the stopper 17 is released, the table 10 suspended by the cylinder 13 is moved up and down by extending and retracting the lifting cylinder 13,
Loading and unloading of luggage is performed. At this time, lift table
The ten columns 11 are guided by the grooves 8 and the guide rails 9, and the guide rollers 12 provided in the guide rails 9 prevent rattling and smoothly move up and down.

When the lift table 10 is in contact with the ground, the transfer plate 19 and the lift table
By connecting the lift table 10 to the lift table 10 and the ground to eliminate the step, the loading of containers and the like on the lift table 10 is facilitated, and the workability is improved, while the lift table 10 is raised, and the lift table 10 and this lift When the transfer plate 19 attached to the table 10 is separated from the ground surface, the transfer plate 19
The biasing force and the own weight of the transfer plate 19 are balanced by the 22 and held almost horizontally in a slightly inclined state,
19 projects rearward from the lift table 10. And
When the lift plate 10 is lifted up to the height of the floor 3, the transfer plate 19 and the rotating roller 27 of the engaging portion 25 are engaged with each other at a position slightly lower than the floor 3 in accordance with the lift of the lift table 10. As shown by the dashed line in FIG. 1, the transfer plate 19 rotates downward by engagement with the rotating roller 26, and is held substantially vertically against the torsion spring 22.

Then, after the load is loaded in the packing box 1, the locking cylinder 15 is retracted to move the lock body 16 rearward along the guide plate 18, and the lock claw 14 and the stopper 17 are engaged to lock. The lift table 10 is supported by the body 16.

At this time, since the tapered surfaces 14A and 17A are formed at the lower ends of the lock claw 14 and the stopper 17, respectively, the lock body 18 slightly lifts the lift table 10 when the lock claw 14 and the stopper 17 are engaged. Thus, the load of the lift table 10 is applied to the chassis frame 7 after the lock body 16 is mounted via the lock body 16. Therefore, during traveling, since the lift table 10 is supported by the rear chassis frame 7, the load of the lift table 10 is not directly applied to the cylinder 13 on which the lift table 10 is suspended. The cylinder 13 can be protected by suppressing the burden on the cylinder 13.

As described above, in the present invention, the transfer plate 19 attached to the end of the lift table 10 which can be moved up and down is engaged with the engagement projection 25 in accordance with the lift of the lift table 10, and the transfer plate 19 is rotated downward. By doing so, it is possible to automatically suspend the handing plate without relying on humans at the end of the cargo handling work, and the operability is good.In addition, since the handing plate 19 is rotated and held downward, the handing plate 19 The storage space in the packing box 1 is not narrowed by the dead space, the inside of the packing box 1 can be used effectively and efficiently, and the lift table 10 is arranged on the inner side of the packing box 1 of this kind. In the device, the floor opening 4 and the rear opening 2 serving as a luggage doorway are connected to each other, and if a conventionally used bumper is attached, it will interfere with the luggage getting in and out of the lift table 10, but in the present invention. It is possible to cause the function of a bumper by and plate 19.

As mentioned above, although one Example of this invention was described in detail, it can change suitably within the scope of the gist of this invention. For example, in the above-described embodiment, an example was shown in which the columns were erected on the rear side of the lift table.However, a pair of right and left columns were erected on the front side of the lift table 10, and the inner side of the packing box corresponding to the columns was provided. A guide rail 9 for guiding the pillars may be provided, or four pillars may be erected at each corner of the lift table, and the molding position and number thereof may be appropriately selected. Although a cylinder is used as the lifting mechanism of the lift table, it can be applied to various types such as an air cylinder, and the lift table is suspended by a chain or a wire, and a cylinder or an electric winch is connected to the lift table via the chain or the wire. The lift table may be moved up and down. In addition, the lift floor portion can be formed in a part of the floor portion of the packing box, for example, when a side opening is provided, the lift floor portion is provided on the side along the side opening when the packing box has a side opening.

[Effects of the Invention] As described in detail above, according to the present invention, a cargo box is mounted on a chassis frame of a truck and a floor surface opening is formed on the rear end side of the floor surface of the cargo box. A lift table that opens and closes the floor opening through the left and right chassis frames is provided so as to be able to move up and down. The lift table closes the floor opening at its upper limit position, and the lift table and the packing box Place the floor and the same plane,
When the lift table is grounded, in a lift apparatus for a lorry in which a transfer plate for eliminating a step between the lift table and the ground contact surface is rotatably supported at the rear end of the lift table, A spring is provided for resiliently supporting the transfer plate distant from the ground, and the transfer plate protrudes rearward from the lift table to hold the transfer plate substantially horizontally, and a rear end of the chassis frame. An engaging projection that can be brought into contact with the handover plate held by the ram is fixed at a position lower than the floor of the packing box, and a position lower than the floor of the packing box when the lift table is raised. The engaging projection is engaged with the transfer plate at the position, and the transfer plate is moved with the spring as the lift table moves upward from the engagement position between the engagement protrusion and the transfer plate to the floor surface. Pivot downwards against the machine By holding the transfer plate almost vertically at the upper limit position of the lift table, it is possible to eliminate dead space caused by the transfer plate in the packing box and to effectively and efficiently load luggage in the storage space of the packing box. It is possible to provide a lift device for a lorry, which does not require the turning operation of the handover plate.

[Brief description of the drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a sectional view, FIG. 2 is an exploded perspective view of a main part, FIG. 3 is a partially cutaway plan view, and FIG. FIG. 5 is a sectional view. DESCRIPTION OF SYMBOLS 1 ... Packing box 3 ... Floor surface 4 ... Floor surface opening 5, 6, 7 ... Chassis frame 10 ... Lift table 19 ... Handover plate 22 ... Torsion spring (elastic machine) 25 ... Engagement protrusion

Claims (1)

(57) [Scope of request for utility model registration] 1. A cargo box is mounted on a chassis frame of a lorry, a floor opening is formed at a rear edge of the floor surface of the cargo box, and the floor surface passes between the left and right chassis frames. A lift table that opens and closes an opening is provided so as to be able to move up and down. The lift table covers the floor opening at its upper limit position, and arranges the lift table and the floor surface of the packing box on the same plane. When the table touches down, in a lift device for a lorry that rotatably supports a transfer plate for eliminating a step between the lift table and the contact surface so as to be rotatable at the rear end of the lift table, We set up an ammunition that elastically supports the distant passing board,
The transfer plate is protruded rearward from the lift table by the elastic device and is held substantially horizontally, and a rear end of the chassis frame is engaged with the transfer plate held by the elastic device. A protrusion is fixed at a position lower than the floor surface of the packing box, and when the lift table is raised, the engaging protrusion and the transfer plate are engaged at a position lower than the floor surface of the packing box. As the lift table moves upward from the engagement position between the abutment portion and the transfer plate to the floor, the transfer plate is turned downward against the elastic machine to move the transfer plate downward to the upper limit position of the lift table. A lift device for a lorry, wherein the handover plate is held substantially vertically.