JP2009166149A - Belt-shaped punching blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an opening of abutting parts of a belt-shaped punching blade. <P>SOLUTION: In this belt-shaped punching blade embedded in a receiving groove of a substrate, mechanically mutual locking means 10 for preventing a separation in a longitudinal direction L are provided in the abutting parts. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a strip-shaped punching blade generally called a Thomson blade, a Victoria blade or the like.

  Conventionally, a strip-shaped punching blade has been used to punch a workpiece such as a copper foil, an Al foil, a seal, a label, and an electronic substrate into a predetermined shape. That is, it is used for punching the workpiece by implanting it into a receiving groove of a substrate (holder) and attaching it as an upper die and a lower die such as a press (see, for example, Patent Document 1).

  However, as shown in the conventional example of FIG. 4, when the number of punches of the workpiece increases from tens of thousands to hundreds of thousands, the gap between the receiving groove 22 of the substrate (holder) 21 and the belt-like punching blade 23 is increased. In some cases, a minute gap may be generated in the gap, and the butt portion 24 opens as shown in FIG. Further, as indicated by a two-dot chain line in FIG. 4A, there is a possibility that the end portion 25 of the strip-shaped punching blade 23 is lifted in the width direction (out of the receiving groove 22).

  In such a state, it becomes difficult to punch the workpiece beautifully (in an accurate shape). Furthermore, the workpiece may not be completely punched.

  Conventionally, as one of the countermeasures, two types of belt-like punching blades having the same planar shape and different butting portions are implanted in the substrate and punched twice to completely punch the workpiece. There was a problem that work efficiency was poor because the process was necessary.

Therefore, as described in Patent Document 2 below, a method has been proposed in which the butt portion is fixed by welding means.
Japanese Patent No. 2502441 Japanese Patent Laid-Open No. 7-60699

  However, since this type of strip-shaped punching blade must increase the hardness of the cutting edge to ensure sharpness and life, carbon steel or the like is often used and is difficult to weld. In addition, the heat during welding causes distortion and deformation of the shape, making it difficult to press fit (planting) into the receiving groove, and the welding edge heat lowers the edge hardness at the butt part, resulting in durability of the butt part. There is also a problem that the property (life) is inferior.

Therefore, an object of the present invention is to solve the problems of distortion and deformation due to welding, and to reliably prevent the opening of the butted portion over a long period of use.
Accordingly, an object of the present invention is to provide a strip-shaped punching blade capable of always stably and beautifully punching a workpiece into an accurate size and shape.

In order to achieve the above object, according to the present invention, an abutment portion is provided with interlocking means for preventing separation in the longitudinal direction in a band-shaped punching blade implanted in a receiving groove of a substrate. .
Further, the interlocking means has a function of preventing mutual movement in the width direction.
Further, the mutual locking means has a key-shaped locking portion that is engaged with each other at both ends constituting the butted portion so as to protrude.
Further, the interlocking means has a locking male part formed in a protruding shape at one end constituting the abutting part, and a locking female part into which the locking male part is fitted is recessed at the other end. .

The present invention has the following remarkable effects.
Interlocking means do not cause the butt to open, allowing workpieces such as various metal foils, seals, labels, and electronic boards to be stably punched into high-precision dimensions and shapes over a long period of use. It becomes.
Since mechanical interlocking means is used, the butt portion can be processed efficiently (by punching or the like) without being affected by thermal distortion or deformation caused by conventional welding.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
In the overall perspective view of FIG. 1 and the cross-sectional view of the main part of FIG. 2, 1 is a substrate (holder) made of plastic, plywood, etc., and has a small width (up and down) and a large depth. A groove) 2 is formed on one surface of the substrate 1, and a strip-shaped punching blade 3 is implanted in the receiving groove 2.

  The punching blade 3 is generally called a Thomson blade or a Victoria blade, and the material is carbon steel. The cutting edge 4 is a sharp double-blade type as shown in FIG. ) And a half-cut type with a rounded edge (not shown) having a small round shape (not shown).

  In the punching blade 3, the distal end side 5 with the cutting edge 4 is exposed (protruded) from the substrate 1, and the proximal end side 6 is implanted in the receiving groove 2 of the substrate 1 (in a press-fit state).

  In FIG. 1, the case where the butting | jumping part 7 is formed in one place by bending the one strip | belt-shaped punching blade 3 and making the whole shape into a square closed ring is illustrated. Depending on the shape of the workpiece to be punched out, there may be other polygonal shapes, elliptical shapes, circular shapes, box shapes, and other complicated various shapes. However, there is at least one butting portion 7 and a plurality of band shapes. Using a blade, it may be implanted into the substrate 1 as a wide variety of overall shapes so that there are two or more butted portions 7 (not shown).

  As shown in FIGS. 3A to 3E, the belt-like punching blade 3 according to the present invention is a mechanical interlocking means 10 for preventing separation in the longitudinal direction L at the butting portion 7. It comprises.

  First, from FIG. 1 and FIG. 3B, a circular locking male portion 13 is formed on one of the one end portion 11 and the other end portion 12 (one end portion 11 side in the illustrated example) constituting the butting portion 7. A circular notch-shaped locking female part 14 is recessed on the other side (the other end 12 side in the example), and the locking male part 13 is fitted into the locking female part 14. The locking male part 13 and the locking female part 14 are fitted to each other from the thickness direction and held (press-fitted) in the receiving groove 2 of the substrate 1 (see FIG. 1). In FIG. 3B and FIG. 1, the interlocking means 10 not only prevents separation in the longitudinal direction L but also allows mutual movement (of the end portions 11 and 12) in the width direction W. Also has a function to prevent.

  Next, in another embodiment shown in FIG. 3 (c), an inverted trapezoidal locking male portion 13 is projected from one end portion 11, and an inverted trapezoidal engagement (with a dovetail shape) is provided at the other end portion 12. The locking female part 14 is recessed, and the locking male part 13 and the locking female part 14 are fitted (fitted) to each other. The fitting is performed from the thickness direction as in FIG.

  In FIG. 3C, the interlocking means 10 functions to prevent separation of the both end portions 11 and 12 in the longitudinal direction L and at the same time prevent mutual movement in the width direction W.

  3 (a), 3 (d) and 3 (e), the interlocking means 10 is connected to both end portions 11 and 12 constituting the abutting portion 7 with respect to each other. Matching key-shaped locking portions 16, 16 are formed in a protruding shape.

  Both key-shaped locking portions 16, 16 are arranged in a point-symmetric manner. In FIG. 3A, the key-shaped locking portions 16 are L-shaped and locked to each other so that separation in the longitudinal direction L can be prevented. In FIG. 3A, the other end 12 moves (upward in the figure) in the width direction W, but there is an advantage that the shape is simpler and easier to process than in FIG.

  In FIG. 3D, each key-shaped locking portion 16 is an unequal channel type in which the L-shaped tip is further bent at a right angle, thereby preventing separation in the longitudinal direction L, It has a function of preventing mutual movement (of the end portions 11 and 12) in the width direction W. Further, in FIG. 3 (e), each key-shaped locking portion 16 has an inclined trapezoidal portion 18 with an L-shaped tip as an inverted trapezoidal shape, and thereby in the longitudinal direction L and the width direction W (both end portions). (11, 12) is preventing mutual movement.

  In addition to FIGS. 3A to 3E, the shape can be changed. For example, a keyhole shape can be freely used.

  Since the present invention has the above-described configuration, the edge of the strip-shaped punching blade material can be easily manufactured by mechanically punching with a press or the like, and there is no heating such as welding. Softening and thermal distortion (thermal deformation) do not occur, and the substrate 1 can be easily implanted into the receiving groove 2.

And it is possible to reliably prevent the butting portion 7 from being opened and to beautifully punch the workpiece into a highly accurate dimension. In addition, the durability is improved and it can be used for a long time.
Further, unlike the prior art, it is not necessary to perform two-sided punching (punching by two processes), and the production process can be shortened and the cost of the press and mold equipment can be reduced.

It is a perspective view which shows one Embodiment of this invention. It is a principal part expanded sectional view. It is a principal part explanatory front view showing various embodiments of the present invention. It is explanatory drawing of a prior art example, (a) is principal part front explanatory drawing, (b) is principal part expanded sectional explanatory drawing.

Explanation of symbols

1 Substrate (holder)
2 Receiving groove 3 Strip-shaped punching blade 7 Butting part
10 Interlocking means
11 (one) end
12 (other) end
13 Locking male part
14 Locking female part
16 Key-shaped locking part L Longitudinal direction W Width direction

Claims (4)

  The butting portion (7) is provided with an interlocking means (10) for preventing separation in the longitudinal direction (L) in the strip-shaped punching blade implanted in the receiving groove (2) of the substrate (1). A strip-shaped punching blade characterized by that.   The strip-shaped punching blade according to claim 1, wherein the interlocking means (10) has a function of preventing mutual movement in the width direction (W).   The interlocking means (10) has key-shaped locking portions (16) and (16) which are engaged with each other at both end portions (11) and (12) constituting the butting portion (7). The strip-shaped punching blade according to claim 1 or 2.   The interlocking means (10) has a locking male part (13) formed in a protruding shape at one end (11) constituting the abutting part (7), and the locking male part at the other end (12). The belt-like punching blade according to claim 1 or 2, wherein a locking female portion (14) into which (13) is fitted is recessed.

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