JPS6232800Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a punching device that uses a punching blade to punch out sheet materials such as paper, cloth, plastic sheets, leather, rubber sheets, etc. or molded sheet materials.

Conventional punching devices use a punching blade embedded in a groove carved into a single substrate such as a plywood board so that the cutting edge is aligned along a single plane or a monotonous cylindrical surface. It was for punching out a flat sheet material.
Therefore, for example, as shown in the cross-sectional view in FIG.
In the first step, for example, the outline of the outer periphery is punched out, in the second step, the semi-finished product with the outer periphery punched out is aligned and set in a die for punching the center part, and in the third step, a hole in the center part is punched out. It required three steps. When the height of the material to be punched differs in this way, not only is a separate punching process required for each height, but also a great deal of effort is required to align the positions between each punching process, which increases manufacturing costs. It has the drawbacks of being expensive and requiring time.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks all at once.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 2 is a side view showing the entire embodiment of the present invention, Fig. 3 is a front view of the lower mold with the punching blade installed, Fig. 4 is a sectional view of Fig. 3, and Fig. 5 is the patch plate. FIG. 6 is a sectional view of FIG. 5.

Lower mold board 11 made of a square plywood board or composite board
The upper mold substrate 12 has displacement type hinges 15, 15, which will be described later, fixed to, for example, two places on one side thereof, and an elastic body 16 such as a sponge is interposed around the periphery between both the substrates 11, 12, so that the hinge can be fixed. It opens and closes at the center, and both substrates 11 and 12 are connected so that the distance between the two substrates changes while remaining parallel. Here, the displacement type hinge 15 has two leaves 17 and 18 that open and close around a pin 19, as shown in FIG. A displacement device consisting of a cylindrical body 21 that fits into the sliding rod is provided, and is a hinge that expands and contracts the distance between the leaves.

Punching blades having different heights depending on the three-dimensional shape of the product to be punched are implanted in the lower die substrate 11 in a predetermined contour shape. That is, a cutting blade 22 for contour punching formed of a punching blade with a height of 50 mm, for example, a cutting blade 23 for punching square holes formed of a punching blade with a height of 40 mm, and a cutting blade 23 for punching circular holes. A cutting blade 24 is installed respectively.

On the other hand, the upper die substrate 12 is provided with backing plates having heights that are complementary to the heights of the punching blades of 50 mm and 40 mm, for example, heights of 46 mm and 36 mm. In other words, 36 mm corresponding to the cutting edge 22 for contour punching.
The contact plate 26 for contour punching is directly applied to the substrate 11 with a thickness of mm.
is placed on the board, and a plywood board 2 with a thickness of 10 mm is placed on the board.
5 are superimposed, and a backing plate 27 for punching a square hole is placed on top of the
A backing plate 28 for punching circular holes is also provided. Each patch plate is made of a hard metal plate such as a stainless steel plate.

When using the apparatus of the above embodiment, all the punching and cutting can be performed at once by simply clamping the semi-finished product to be processed between the lower die and the upper die and pressing it with a press machine etc. be done.

According to the present invention, punching blades of different heights are provided on a single substrate, and the first and second substrates are connected to each other via a deformable hinge whose rotation center is displaced in the punching direction. Since these are connected, it is possible to simultaneously punch out the peripheral contour of a sheet-shaped molded product with three-dimensional undulations and the hole in the central convex part, which is different from the conventional case of punching in two steps. This eliminates the need for precise positioning and improves work efficiency.

In addition, since both boards are connected by a displacement hinge and an elastic body is interposed between both boards,
Before punching the workpiece, as shown in Figure 2, both substrates are supported in parallel by the elastic body, and then, while maintaining the parallel state of both substrates, the pin of the hinge is Since punching is performed by displacement, cutting is performed perpendicularly to the sheet surface of the workpiece for each stage of the blade, and no load is applied to the hinge during punching, and the The substrate can be easily opened and closed in both the above and later states.

The present invention is not limited to the above-mentioned embodiments; for example, a wooden plate may be used instead of the metal backing plate, or a punching blade (Thomson blade) in a narrow sense may be used instead. This can be carried out by using a punching blade in a broad sense, such as a press liner or a sewing machine blade, in parallel.

Furthermore, it is also possible to provide a patch plate mainly in a part of the lower mold where the punching blade is installed, and to install the punching blade mainly in a part of the upper mold where the patch plate is installed. Alternatively, the substrate can be directly attached to a press machine.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a workpiece.
Figure 2 is a side view showing the entire embodiment of the present invention;
The figure is a front view of the lower mold of the above embodiment, FIG. 4 is a sectional view of FIG. 3, and FIG. 5 is a front view of the upper mold of the above embodiment.
6 is a cross-sectional view of FIG. 5, and FIG. 7 is a partially cutaway perspective view showing an example of the displacement type hinge of the above embodiment. 11...lower substrate, 12...upper substrate, 22,
23, 24...Punching blade, 26, 27, 28...Packing plate.

Claims (1)

[Scope of utility model registration request] A first punching blade is formed in a predetermined loop shape and is implanted so that the height of the cutting edge is on the first plane, and another punching blade is formed in a loop shape that does not intersect with the above loop shape and is planted so that the height of the cutting edge is on the first plane. a first substrate having a second punching blade implanted so as to be on a second plane different from the first plane; A second substrate is provided with a backing plate having a height that is the same as the height of the cutting edge, and both leaves are fixed to the first and second substrates, and the punching is performed. A displacement type hinge having a sliding rod and a cylindrical body between one leaf and a pin, which are slidably displaced parallel to the direction, and an elastic body interposed between the first substrate and the second substrate. and a cutting device using punching blades, wherein the first and second punching blades are configured to simultaneously punch out a sheet material molded product having a three-dimensional shape on planes having different heights.