JPH0344783Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a clamp for lifting steel plates that can be inserted into the edge of a wide steel plate with a single touch and lifted as it is. To provide a clamp which can be normally attached and lifted even when a locking device is not removed, and which is completely fixed to a steel plate no matter how loose a lifting chain is and allows safe work to be carried out without the steel plate slipping down.

(Prior technology) Since it is difficult to use wire ropes for slinging on wide steel plates, etc., conventionally, a frame steel plate insertion opening is formed, and the tip of the cam is rotatably supported with the insertion opening facing the insertion opening. Connect the rear end of the cam with a lifting wire rope, etc., insert the steel plate into the insertion hole, attach the frame to the steel plate, lift the wire rope, rotate the cam, and lift both sides of the steel plate with the tip of the cam. The steel plate was lifted by pressing the frame and completely fixing the frame to the steel plate using its own weight.

(Problem to be solved by the invention) However, with this conventional device, when the lifting wire rope etc. becomes loose, the cam rotates to the loosened side and loses its fixing force to the steel plate. If the steel plate lands vertically or diagonally when suspended, or if the frame is set in the wrong direction, the cams will loosen and the steel plate will fall off, which is extremely dangerous.

(Means for Solving the Problems) The present invention was made to solve the problems of the conventional methods, and allows steel plates to be hung diagonally from any angle. The object of the present invention is to provide a clamp for lifting a steel plate that is configured to be fixed to the steel plate even if the rope becomes loose.The gist of the clamp is to form a steel plate insertion hole in the frame, and make the tip of the cam face the steel plate insertion hole. and a link chain is connected to the rear end of the cam, and a roller is pivotally supported substantially above the steel plate insertion opening to lock the link chain.
Also, one end of a pair of metal elastic bodies is fixed to a cylinder having an appropriate length and openings at the top and bottom, and the metal elastic bodies are curved into an arc shape, and the other end is fixed to a cylindrical body that is opened up and down at an appropriate length. A lock plate is rotatably supported on both sides of the frame, and a substantially cross-shaped link chain insertion hole is provided in the cylindrical body, and a lock plate having a notch for inserting only the horizontally long link of the link chain is inserted through the link chain. Pivotally mounted directly above the hole,
The clamp for lifting a steel plate is characterized in that the roller chain is inserted into a cylindrical body and the upper end thereof is lifted up.

(Function) Therefore, according to the present invention, the tip of the cam is pivoted so as to face the steel plate insertion opening formed in the frame, the rear end of the cam is connected to the link chain, and the steel plate insertion opening of the link chain is connected to the rear end of the cam. Since it is locked to a roller that is pivotally supported substantially at the top, even if the top of this link chain is pulled from the direction in which the cam opens, the direction is changed by the roller, so the cam is always pulled toward the tightening side.

Furthermore, this link chain is inserted into a substantially cross-shaped link chain insertion hole and locked, and since the locking part is attached to the frame by bending a metal elastic body fixed to the cylinder, the cylinder is always attached upward. This causes the link chain to constantly try to rotate the cam toward the tightening side. Therefore, this clamp can hang the steel plate diagonally from any angle, and can firmly fix the steel plate even if the lifting link chain loosens as long as the lock is not released. Especially with this type of clamp, if you lift the load in the wrong direction or lower it in the wrong direction, the cam will loosen and the load will fall off, which is extremely dangerous.
The device of the present invention has no directionality and is extremely safe.

(Example) Examples of the present invention will be described below based on the drawings.

In the figure, 1 is a frame, 2 is a cam, 3 is an elastic ring made of metal spring material covered with rubber, 4 is a pipe,
5 is a link chain, and 6 is a top plate having a link chain insertion hole 7 in the center thereof. Numeral 8 is a locking plate having an elongated notch 9 formed on one side thereof, and is pivotally connected to the top plate 6 so as to overlap one of the cross-shaped holes of the link chain insertion hole 7.

The frame 1 is assembled by separating the side plates 10, 10 by a certain distance using spacing members 11 and 12.
Further, the frame 1 has a steel plate insertion opening 13 formed at the lower part, and the tip 14 of the cam 2 is inserted into this steel plate insertion opening 13.
The cam 2 is pivotally supported in a state where it faces.
Reference numeral 15 denotes a roller, and one of its curved surfaces is pivotally supported on the upper part of the frame 1 at a position approximately in the center of the steel plate insertion opening 13.

Further, one end of each elastic ring 3 is fixed to the pipe 4, and the other end of the elastic ring 3 is rotatably supported on both sides of the frame 1 and substantially above the steel plate insertion opening 13. .

Then, the middle of the link chain 5 is locked to the roller 15, and one end of the link chain 5 is connected to the rear end of the cam 2 to connect the shaft 1 to the roller 15.
It is connected via 6. The other end of the link chain 5 is connected to a shackle 17 by passing through the pipe 4 and the top plate 6, and the shackle 17 is hung on a crane hook 18 or the like and lifted up.

Incidentally, 19 is a pad that forms a file with the tip 14 of the cam 2 to prevent slipping.

When this clamp first bends the elastic ring 3 and inserts it into the link chain 5 using the lock plate 8, the link chain 5 will always be biased in the direction of pulling up the rear end of the cam 2 by the elastic ring 3. When the steel plate insertion port 13 is inserted into the edge of the steel plate in this state, the cam 2 pulls the link chain 5 to further bend the elastic ring 3 and rotate it to the loosening side, and after inserting the steel plate, the elastic ring 3 moves to the tightening side again. It rotates and is fixed to the steel plate. The clamp can therefore be used from any direction. In addition, steel plates can be transported not only horizontally, but also vertically, and lowered while being tilted diagonally. Moreover, even if the link chain 5 becomes loose when the lower end touches the ground during unwinding, there is no danger of the clamp coming off. Its usage state diagrams are shown in FIGS. 4 to 9.

Moreover, even if the cam 2 is not biased toward the tightening side by the elastic ring 3 from the beginning, it may be biased after the steel plate is inserted, and the cam 2 can be used in exactly the same way.

(Effects of the invention) As described above, according to the present invention, by having the structure with the above features, steel plates, etc. can be lifted from any direction, and even if the lifting wire rope, etc. becomes loose, the steel plates, etc. will not fall off. You can work safely without any trouble.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing an embodiment of the invented steel plate lifting clamp, Figure 2 is a side view of the same, Figure 3 is an explanatory diagram showing the operating state of the main parts, and Figures 4 to 9 are the same usage. It is an explanatory diagram showing a state. 1: Frame, 2: Cam, 3: Elastic ring (elastic metal body), 4: Pipe (cylindrical body), 5: Link chain,
7: Link chain insertion hole, 8: Lock plate, 9: Notch, 13: Steel plate insertion port, 14: Tip, 15: Roller.

Claims (1)

[Scope of utility model registration request] A steel plate insertion opening is formed in the frame, and the tip of the cam is pivotally supported on the frame with the tip facing the steel plate insertion opening, and a link chain is connected to the rear end of the cam, and a roller is pivotally supported approximately above the steel plate insertion opening. The link chain is locked, and one end of a pair of metal elastic bodies is fixed to a cylindrical body with an appropriate length that is opened up and down, and the metal elastic bodies are curved into an arc shape, and the other end is attached to the link. The chain is rotatably supported on both sides of the frame in the vicinity of the roller locking area, and a substantially cross-shaped link chain insertion hole is provided in the cylinder body, and a notch is formed into which only the horizontally long link of the link chain is inserted. A clamp for lifting a steel plate, characterized in that a locking plate is rotatably mounted just above the link chain insertion hole, and the roller chain is inserted into the cylindrical body to lift its upper end.