JPH09118437A - Deck board for cargo handling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deck board for cargo handling capable of smoothly derricking a deck board. SOLUTION: A deck board 4 is pivotably supported by a frame 2 provided on a platform so as to be derricked by the operation of an actuator 6, a tip 13 is extended through a pivot 12 so as to be suspended from the tip of the deck board 4 through the self-weight, a tip of a rod 26 is pivotably fitted to a lower side of the lip 13, and a base end of the rod 26 is connected below the deck board 4. As the deck board 4 is erected, the rod 26 is pushed out to erect the lip 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a forklift truck or the like to be mounted on a platform from the platform by filling a gap or a step between the platform and the platform provided on the platform. The present invention relates to a deck board for cargo work that facilitates loading and unloading of luggage.

[0002]

2. Description of the Related Art Conventionally, a lip type deck board has been provided on platforms such as a collection / delivery center and a warehouse in order to eliminate a step with a truck bed and to fill a gap. This is because the deck plate is supported so as to oscillate when actuated by an actuator such as a hydraulic cylinder, and the lip extending from the tip edge of the deck plate is put on the platform of the truck to support the deck from the platform. It is designed so that a forklift car with luggage on it can be loaded.

Conventionally, in such a deck board with a lip, as shown in FIG. 10, a lip g is extended on a tip edge of a deck board a through a pivot h and is supported below the deck board a. A substantially T-shaped link c is rotatably provided by an axis b, the other end of a chain d having a lower end fixed to a frame is fixed to one end of the link c, and a pin e is provided to the other end of the link c. To connect the rod f, and the tip of the rod f is connected to the lip g
It is connected to the lower side of the deck via a pin i, and when the deck board a is erected in a forward inclined shape as shown by the arrow, it is a chain d.
Is pulled so that the link c rotates, the rod f pushes the lip g, and the lip g stands up frontward. In addition, j is a stopper provided on the lower surface of the deck plate a for stopping the rotation of the link c, and in this state, the pin e is located slightly below the straight line connecting the support shaft b and the pin i. k is a deck board a for lifting the rod f and returning the lip g.
The pull-up metal fitting is provided above the through hole.

[0004]

By the way, in the deck board constructed so that the lip g also stands up as the deck board a stands up, the tensile load of the chain d is suddenly applied to the deck board a from the middle of standing up. As a result, the deck boards suddenly became heavy. Therefore, an actuator such as a hydraulic cylinder for erecting the deck plate a needs to have a large capacity corresponding to its load, which causes a problem of high cost. Further, in the structure in which the deck plate a is manually erected, the weight suddenly becomes heavy during the erection, which imposes a strain on the waist, and a light operation cannot be performed, which causes a deterioration in workability.

[0005]

DISCLOSURE OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by a deck board for load work, in which a deck plate is supported on a frame provided on a platform so that the deck board can be oscillated by an actuator. Then, a lip is extended through the pivot so that it hangs down to the tip of the deck plate by its own weight, the tip of the rod is pivotally attached to the lower side of the lip, and the rotating body is placed below the deck plate in the vertical plane. And rotatably support the rod, and connect the base end of the rod to the rotor, connect both ends of the rope to the rotor and the frame, and pull the rope as the deck plate stands up. In the deck board for load work in which the rotating body rotates and the rod is pushed out to raise the lip, pulleys are provided on the frame and the lower surface of the deck plate, respectively, and the ropes are circulated to the respective pulleys so that both ends are Husband on rotating body and frame While Yuitome, characterized by comprising a tension spring provided on 該索 Article.

[0006]

In the process of raising the deck plate, the tension of the rope is stored in the tension spring, so that the force required to raise the deck plate does not suddenly increase, and the lip can be raised smoothly.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an example of an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a frame 2 is fixedly installed in a plane U-shaped pit formed on a platform 1, and a support shaft 3 is horizontally installed at an upper rear portion of the frame 2 as shown in FIG. A deck plate 4 is supported on the support shaft 3. 6 is a hydraulic cylinder stretched as an actuator between the frame 2 and the lower surface of the deck plate 4,
The expansion / contraction operation of the hydraulic cylinder 6 causes the deck plate 4 to move to the support shaft 5
It oscillates around the fulcrum. Reference numeral 7 is a spring type balancer provided to reduce the weight of the deck plate 4 added to the hydraulic cylinder 6, and an arm 9 supported on the frame 2 so as to be capable of undulating with a support shaft 8 as a fulcrum is a tension coil spring. 10, the roller 11 provided at the tip of the arm 9 is brought into contact with the cam plate 48 provided on the lower surface of the deck plate 4, and the elasticity of the coil spring 10 causes the roller 11 to intervene through the deck. The plate 4 is always biased upward.

A lip 13 is extended from the tip edge of the deck plate 4 via a pivot 12. The lip 13 is provided with a spring type balancer as shown in FIG. 3 in order to reduce its own weight. That is, a round rod-shaped pressing rod 15 is inserted into a bearing piece 14 fixed to the lower surface of the deck plate 4, and a tip portion 16 of the pressing rod 15 is provided with a pin 17 to a lip 13
A coil spring 19 externally connected to the pressing rod 15 is connected to the mounting piece 18 fixed to the lower surface of the above, and is arranged in a compressed state between the bearing piece 14 and the tip portion 16. Therefore, due to the elasticity of the coil spring 19, the tip portion 16, the pin 17, the mounting piece 18
The load of the lip is reduced by pushing the lip 13 upward by pressing the lip 13 via the so that the up-and-down movement of the lip can be lightened.

Further, as shown in FIG. 5, a pair of bearings 20 are provided on the base 46 at a portion of the lower surface of the deck plate 4 slightly close to the support shaft 3 as shown in FIG. A rotating body 21 is rotatably supported on the bearing 20 by a fulcrum shaft 47. The rotating body 21 is formed by forming a link 22 and a lever 23 in a bent shape of a side surface V shape, and a pin 24 is fixedly planted at the tip of the link 22. Then, the tip of the rod 26 is pivotally attached to the attachment piece 25 fixed to the lower surface of the lip 13 via a pin 27, and the pin 24 is inserted into a long hole 28 formed at the base end of the rod 26. The link 22 and the rod 26 are connected.

Reference numeral 40 is a protrusion 41 on one side of the link 22.
It is a stopper composed of a bolt hinged to the nut 42. Reference numeral 43 denotes a cylindrical collar rotatably fitted on a protruding shaft 44 provided on one side of the lever 23. Reference numeral 45 denotes an inclined rod-shaped guide rod projectingly provided on the frame 2 so as to face the collar 43.

Reference numeral 30 denotes a pulley sprocket rotatably supported on the frame 2, 31 denotes a pulley sprocket rotatably supported on the lower surface of the deck plate 4, and 32 circulates between the sprockets 30 and 31. With a chain as a cord, one end 33 of the chain 32 is fixed to the lever 23,
The other end 34 is fixed to the frame 2. Reference numeral 35 is a tension spring whose one end is fixed to the frame 2 in order to elastically pull the chain 32 through the hook plate 36.

Therefore, as shown in FIGS. 2 and 5, when the deck board 4 is horizontal (when not in use), the lip 13 hangs vertically due to its own weight. Therefore, when the deck board is to be laid over the loading platform 50 such as a truck, the hydraulic cylinder 6 is extended and the deck board 4 is once erected largely upward as shown in FIG. Then, the lever 23 is pulled by the chain 32, the rotating body 21 is rotated, and the link 22 is rotated upward, so that the rod 26 is pushed out and the lip 13 is erected, and the link 22 and the rod 26 are in a linear state. The tip of the stopper 40 is slightly above the base 4
By hitting 6, the rotation of the rotating body 21 is stopped.
Therefore, even if the deck plate 4 is lowered from this state, the lips 13 are held in the upright state. That is, when the pin 24 is above the straight line connecting the pin 27 and the fulcrum shaft 47 (hereinafter, temporarily locked state), the lip 13 remains upright even when the tension by the chain 32 is removed. At this time, a play g exists between the leading edge of the deck board 4 and the trailing edge of the lip 13.

In the process of standing up the deck board 4, the chain 3
When 2 is pulled, the tension is temporarily stored in the tension spring 35. Therefore, even if dust or the like fits in the pivot 12 of the lip 13 and the movement of the lip 13 is not smooth due to the friction, the hydraulic pressure is reduced. No excessive load is suddenly applied to the cylinder 6. For this reason, the deck board 4 can always be erected smoothly without the need for the large-power hydraulic cylinder 6.

Then, the hydraulic cylinder 6 is gradually contracted from the state shown in FIG. 6 to lower the deck plate 4 as shown in FIG. 7 to place the lip 13 on the bed 50, and the load of the lip 13 is loaded on the bed 50. Then, when the lip 13 is further lifted in the movable range by the play g, the rod 26 is free to move due to the elongated hole 28, and the rod 26 hangs down by its own weight so that the descending pin 24 connects the pin 27 and the fulcrum shaft 47. It is below the connecting straight line and the locked state is released. In this way, a forklift truck or the like can be run on the deck board 4 in a state where the lip 13 is hung on the luggage carrier 50 to load and unload luggage.

After use, if the hydraulic cylinder 6 is extended again and the deck plate 4 is slightly raised, the lip 13 hangs down by its own weight as shown in FIG. 8 and can be returned to the state of FIG.

When the deck board 4 is lowered when the loading platform 50 is not present, the collar 43 hits the guide rod 45 and the lever 23 is forcibly rotated in the direction of the arrow as shown in FIG. Can release the temporarily locked state of the lip 13.

The present invention can be modified in various ways other than this embodiment without departing from the scope of the invention. For example, the rotating body 21 may have the same configuration as the conventional one.

[0018]

As described above, in the deck board for load work according to the present invention, since the tension spring is provided on the rope for erecting the lip, the deck board can always be smoothly moved up and down, and the operability is improved. effective.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a deck board for cargo work according to the present invention.

FIG. 2 is a vertical sectional view of a deck board for load work according to the present invention.

FIG. 3 is a vertical sectional view of a spring type balancer for a lip of a deck board for load work according to the present invention.

FIG. 4 is a bottom view of the bearing portion of the rotating body of the deck board for load work according to the present invention.

FIG. 5 is a vertical cross-sectional view of a main part of the deck board for load work according to the present invention.

6 is an operation state diagram of FIG. 5.

7 is an operation state diagram of FIG.

FIG. 8 is an operation state diagram of FIG.

FIG. 9 is an operation state diagram of FIG.

FIG. 10 is a vertical cross-sectional view of a main part of a conventional cargo work deck board.

11 is an operation state diagram of FIG.

[Explanation of symbols]

 1 platform 2 frame 3 support shaft 4 deck plate 6 actuator (hydraulic cylinder) 12 pivot 13 lip 20 bearing 21 rotor 22 link 23 lever 24 pin 26 rod 28 long hole 30 pulley (sprocket) 31 pulley (sprocket) 32 rope ( 35) Tension spring 40 Stopper 44 Projection shaft 45 Guide rod

Claims (1)

[Claims] 1. A deck plate is rotatably supported by a frame provided on a platform so that the deck plate can be moved up and down by the operation of an actuator, and a lip is extended through a pivot so as to hang down to the tip of the deck plate by its own weight. , The tip of the rod is pivotally attached to the lower side of the lip, the rotating body is rotatably supported on the lower side of the deck plate in a vertical plane, and the base end of the rod is connected to the rotating body, and the rope is connected. In the deck board for load work, the both ends of the are connected to the rotating body and the frame, and the rope is pulled as the deck board is erected, the rotating body is rotated, the rod is pushed out, and the lip is erected, Pulleys are provided on the frame and on the lower surface of the deck plate, respectively, and the ropes are circulated in the pulleys to connect both ends to the rotating body and the frame, respectively, and the tension springs are provided on the ropes. Characteristic cargo work deck Ki board.