JP2556816Y2 - Lower frame support device for plate bending machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a lower frame of a plate folding machine for bending a thin plate such as a tin plate or a galvanized plate.

[0002]

2. Description of the Related Art A conventional bending process of a thin plate such as a tin plate or a galvanized plate includes a process of bending an intermediate portion of a plate body at a specific angle or folding an end portion, that is, a so-called wasteful bending process. . When bending at a specific angle, the lower frame is fixed to the lower frame receiving stand of the plate bending machine, and the bending is performed in one step in which the plate is pressed and bent by the upper frame that can be raised and lowered. In the case of waste folding, the lower frame is supported on the lower frame receiving stand in a floating state. First, the upper frame is pressed and bent in a V-shape, and then the pressing portion of the lower frame is used. Then, the V-shape is folded back and crushed by the lower block which is pressed down by the upper block, and the processing is performed in two steps.

[0003] Therefore, since the supporting state of the lower frame is different between bending at a specific angle and wasteful folding, when performing wasteful folding,
Take out the lower piece fixedly installed in the insertion groove of the cradle, insert a leaf spring for floating into the insertion groove, insert the lower piece on it, and start the processing work, again at a specific angle When bending is performed, the leaf spring is removed, and in any case, the lower piece needs to be attached and detached. Further, as another method, a lower piece having a concave groove for bending the end of the workpiece into a V-shape on the upper surface and a pressing portion for crushing the end bent in the V-shape on the front surface. The lower portion is fitted into the fitting groove of the lower bridge, and a spring is provided in the fitting groove of the lower bridge so as to freely move in and out.

[0004]

[Problems to be Solved by the Invention] As described above, since the supporting state of the lower piece is different between the bending at a specific angle and the waste folding, the lower piece must be attached and detached at the same time to attach and detach the leaf spring. There is a danger of preparation and the dangers involved, leading to reduced work efficiency. In the case of a spring in which the spring is freely inserted and removed in the insertion groove of the lower bridge, it is not necessary to attach and detach the lower bridge. It is what becomes.

SUMMARY OF THE INVENTION In view of the above, the present invention is to provide a lower frame supporting device for a plate bending machine which can easily perform any bending without any trouble.

[0006]

According to the present invention, there is provided a groove 4 in which a lower portion is fitted into a fitting groove 3 of a lower block receiving base 2 and an end of a workpiece 9 is bent on an upper surface. The bottom of the lower block 1 having a pressing portion 5 that presses against the upper surface of the lower block receiving base 2 on the front lower surface and crushes the end of the workpiece 9 is directly moved by the cylinder rod 7 of the air cylinder 6. It is characterized by being supported.

[0007]

The operation of the lower-piece support device of the present invention will be described. When the end of the workpiece 9 is formed into a V-shape at the time of waste folding, first, the pressing portion 5 of the lower piece 1 and the upper surface of the lower-piece support 2 are formed. The lower part of the lower block 1 is fitted into the fitting groove 3 at an interval such that the end of the workpiece 9 bent in a V-shape is inserted into the fitting groove 3, and the lower part is supported by the rod 7 of the air cylinder 6. Is placed on the groove 4 of the lower piece 1 and the upper piece 8 is lowered into the groove 4 from above the lower piece 1 so that the pressing portion 5 of the lower piece 1 The lower piece descends until it abuts, and the end of the workpiece 9 is bent in a V-shape in the lowered state. After finishing the V-shape processing, upper piece 8
Rises, the lower piece 1 rises again with the rod 7 extended by the air pressure of the air cylinder 6.

Next, the end of a V-shaped workpiece 9 is inserted into a gap provided between the pressing portion 5 of the lower block 1 and the upper surface of the lower block receiving table 2, and the upper block 8 is inserted into the concave groove 4. If you descend inside, lower piece 1
Is lowered against the rod 7 of the air cylinder 6 by the pressing force of the upper piece 8, and the pressing portion 5 is bent to form a V-shaped workpiece 9.
Is crushed to finish the waste folding. And
If the upper piece 8 is raised after the end of the waste folding, the lower piece 1 is pushed back to the original position by the preset air pressure of the air cylinder 6, and the lower piece 1 is pushed up.

As described above, since the air cylinder 6 directly supports the lower block, it forms a gap and also functions as a spring. On the other hand, at the time of bending at a specific angle, the rod 7 of the air cylinder 6 is contracted by pressing the rod 7 of the air cylinder 6 so that the pressing portion 5 of the lower block 1 comes into contact with the upper surface of the lower end support 2 and is fixedly fitted into the concave groove 4. 1 is supported.

[0010]

FIG. 1 is a sectional view of the apparatus according to the present invention, and FIG. 2 is a side view of a plate bending machine.

In the drawing, A is a plate folding machine main body, and 1 is a lower piece whose lower part is fitted in a fitting groove 3 of a lower piece receiving stand 2 provided on the front side of the main body A. On the upper surface of 1, a concave groove 4 whose upper part spreads upward is provided in the lateral direction. Reference numeral 5 denotes a pressing portion formed on the lower surface of the front portion of the lower piece 1 in a lateral direction.

Reference numeral 6 denotes an air cylinder provided at a lower portion of the lower-piece receiving stand 2, and a rod 7 of the air cylinder 6 projects from below into the fitting groove 3 to support the lower-piece 1. Lower piece 1
The air pressure of the air cylinder 6 that supports is set in advance to such an extent that the lower piece 1 can be lowered when the lower piece 1 is pushed by the upper piece 8 installed above the lower piece 1. Reference numeral 9 in the figure denotes a thin plate-like workpiece such as a tin plate or a galvanized steel plate.

[0013]

[Effect of the Invention] The lower piece can be raised and lowered by the expansion and contraction of the rod of the air cylinder and can be supported in any state, so that the lower piece can be positioned for bending at a specific angle or for unnecessary folding without removing the lower piece itself. is there. Therefore, it is possible to save the trouble of putting the lower piece and the spring in and out of the fitting groove, and it is possible to remarkably improve the work efficiency, which is a useful idea.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a lower bridge support device of the present invention.

FIG. 2 is a side view of the plate folding machine including the lower bridge supporting device according to the present invention;

[Explanation of symbols]

 A Plate Bending Machine Main Body 1 Lower Piece 2 Lower Piece Cradle 3 Fitting Groove 4 Concave Groove 5 Pressing Part 6 Air Cylinder

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower part is fitted in a fitting groove 3 of a lower block receiving stand 2, and has a concave groove 4 on an upper surface for bending an end of a workpiece 9;
The bottom of the lower piece 1 having a pressing portion 5 that presses against the upper surface of the lower piece receiving base 2 on the front lower surface and crushes the end of the workpiece 9 is directly supported by the cylinder rod 7 of the air cylinder 6. A lower frame supporting device for a plate folding machine.