JP6560898B2 - Punch mold - Google Patents

Description

The present invention relates to a punch die used in a punch press machine that performs punching of sheet metal.
More specifically, the present invention relates to a punch die that can quickly attach and detach a punch guide and a retainer with a simple operation.

Conventionally, as a punch mold of this type, an elliptical spring is deformed into a circular shape by pressing a push pin or rotating a rotary cam, and a part of the spring in the short longitudinal direction and the other part are fitted into the outer groove of the guide. After the spring retainer is inserted into the guide, the spring pin is not pushed into the inner groove of the spring retainer. The deformed spring is restored to an elliptical shape, and a part of the spring in the short direction and the other part are fitted into the inner groove of the spring retainer, the spring retainer is held in the guide, and the push pin is pressed or the rotating cam is rotated. There is a punching mold attaching / detaching mechanism in which the elliptical spring is deformed into a circular shape, the spring retainer is removed from the guide, and thereafter this is repeated to attach and detach the two (see FIG. In example, see Patent Document 1).
More specifically, in the case of a push pin, the push pin is supported so as to be able to reciprocate in a radial direction passing through the center line with respect to the guide, and the push pin is pushed by a finger in the radial direction of the guide. The tip of the pin is in contact with a part of the elliptical spring and pressed (compressed) in the radial direction, and the elliptical spring is elastically deformed into a circular shape against elasticity. By releasing the pressing of the push pin from this deformed state, the circularly deformed spring is restored to an elliptical shape by elasticity.
In the case of a rotating cam, the rotating cam is rotatably supported with respect to the guide, and the rotating cam is rotated 90 degrees with a finger so that the tip of the rotating cam contacts a part of an elliptic spring. The oval spring is pressed (compressed) in the radial direction and elastically deformed into a circular shape, and the spring is released from the tip of the rotating cam, thereby restoring the oval spring to an oval shape.

JP 2009-066608 A

However, such a conventional punch die has a structure in which the spring is radially deformed by indirect pressing by the tip of the push pin or the tip of the rotating cam, and the entire shape of the spring is elastically deformed. A sufficient amount of compression is required to completely elastically deform an elliptical spring into a circle, and it is unclear whether an elliptical spring can be completely elastically deformed into a circle with a compact design.
In particular, in the case of a push pin, the amount of reciprocal movement is affected by the radial thickness of the guide. Therefore, if the thickness of the guide is thin, the push pin is pushed and the amount of movement is insufficient. There is a risk that the spring cannot be removed from the inner groove of the spring retainer because it cannot be completely deformed from an ellipse to a circle.
Furthermore, even if the oval spring is pressed with a push pin or a rotating cam, the spring first hits the outer groove of the guide and is pressed against it, and the press between them does not contribute to the deformation of the spring. It is unclear whether or not it can be pushed with a push pin or rotating cam for the length necessary to deform into a circular shape.
In addition, even if the oval spring is pressed with a push pin or a rotating cam, the spring is only displaced in the circumferential direction, and the press in between does not contribute to the deformation of the spring, and the spring is completely changed from oval to circular. There is a possibility that it cannot be deformed.
Even if an elliptical spring is deformed into a circle, it is not considered that the center of the spring will move backward to a position where it will surely coincide with the center of the spring retainer, and it is unclear whether it will be smoothly removed from the inner groove of the spring retainer. There is.
As a result, there has been a problem that the spring retainer cannot be reliably attached to and detached from the guide, and malfunction is likely to occur, resulting in poor reliability and safety.

  An object of the present invention is to cope with such a problem, such that a discontinuous annular portion of an elastic body is directly elastically deformed by an extension portion, and a punch guide and a retainer are easily attached and detached. It is intended.

In order to achieve such an object, a punch die according to the present invention is a cylindrically shaped punch guide having a first annular groove, and is attached to the punch guide so as to overlap in the radial direction. A retainer having a second annular groove radially opposed to the one annular groove, a punch body having a punch blade portion at the end thereof supported in a reciprocating manner in the axial direction inside the punch guide and the retainer; A punch head attached to the punch body, an elastic member provided from the retainer to the punch head, and the first annular groove of the punch guide and the second annular groove of the retainer are elastically deformable. An elastic body provided, and the elastic body is formed in an annular shape in which a part thereof is separated along the first annular groove and the second annular groove. And an extension portion that is continuously formed at the separation end of the discontinuous annular portion and elastically deforms the discontinuous annular portion in the radial direction, and the discontinuous annular portion is not deformed in the radial direction. In a stationary state, the extension guide is disposed so as to lock the punch guide and the retainer relative to each other so as not to move in the axial direction over both the first annular groove and the second annular groove. The punch guide and the retainer are arranged so as to be relatively movable in the axial direction in either the first annular groove or the second annular groove in a radially deformed state by the first annular groove, Or a first locking portion that protrudes toward one of the second annular grooves, and either the first annular groove or the second annular groove is axially aligned with the first locking portion. It is characterized Rukoto to have a second locking portion for recess-projection engaging into .

In the present invention having the above-described features, both the first annular groove of the punch guide and the second annular groove of the retainer are in a stationary state in which the extension portion of the elastic body is not moved and the discontinuous annular portion is not deformed in the radial direction. By disposing the discontinuous annular portion of the elastic body, the punch guide and the retainer are locked so as not to move in the axial direction across the discontinuous annular portion. By moving the extension from this locked state, the discontinuous annular portion is elastically deformed in the radial direction, and the discontinuous annular portion is disposed in either the first annular groove of the punch guide or the second annular of the retainer. The continuous annular portion does not hinder the punch guide and the retainer from moving in the axial direction.
Therefore, the punch guide and the retainer can be easily attached and detached by directly elastically deforming the discontinuous annular portion of the elastic body with the extension portion.
As a result, the discontinuous annular part is an extended part compared to the conventional one that compresses the spring in the radial direction by indirect pressing by the tip of the push pin or the tip of the rotating cam and elastically deforms the entire shape of the spring. Therefore, it is possible to reliably elastically deform the discontinuous annular portion, to prevent malfunction, and to improve reliability and safety, and to make the entire structure compact and simple.

It is explanatory drawing which shows the whole structure of the punch metal mold | die which concerns on embodiment of this invention, (a) is a longitudinal front view of the attachment state of a punch guide and a retainer, (b) is (1B)-of FIG. (1B) It is a cross-sectional top view along a line. It is the elements on larger scale of the removable state, (a) is a longitudinal front view, (b) is a cross-sectional plan view. It is explanatory drawing which shows the modification of an elastic body, (a) is a vertical front view of an attachment state, (b) is a cross-sectional top view along the (3B)-(3B) line | wire of Fig.1 (a). It is the elements on larger scale of the removable state, (a) is a longitudinal front view, (b) is a cross-sectional plan view. It is explanatory drawing which shows the modification of the punch metal mold | die which concerns on embodiment of this invention, (a) is the partial expansion cross-sectional top view of an attachment state, (b) is the partial expansion cross-sectional top view of the detachable state. It is explanatory drawing which shows the modification of the punch metal mold | die which concerns on embodiment of this invention, (a) is the partial expansion cross-sectional top view of an attachment state, (b) is the partial expansion cross-sectional top view of the detachable state.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 6, a punch die A according to an embodiment of the present invention is mounted on a punch press machine B such as a turret punch press, and the reciprocating motion of the striker (ram) B1 results in sheet metal. For example, the workpiece W is punched.
More specifically, a punch die A according to an embodiment of the present invention includes a punch guide 1 formed in a cylindrical shape, a retainer 2 attached to the punch guide 1 so as to overlap in the radial direction, the punch guide 1 and the retainer. 2, a punch body 3 that is supported in a reciprocating manner in the axial direction and has a punch blade portion 3 a at its end, a punch head 4 attached to the punch body 3, and a retainer 2 to the punch head 4. An elastic member (spring) 5 for returning and moving the punch body 3 and an elastic body 6 that is elastically deformable in the radial direction across the punch guide 1 and the retainer 2 are provided as main components. ing.
When punching the workpiece W with the punch press machine B, the punch head 4 receives the pressure applied by the striker B1 of the punch press machine B and transmits the force to the punch body 3 to the punch blade 3a and the die C. Then punch the workpiece W. After the punching process, the punch blade 3 a is pulled away from the workpiece W by the repulsive force of the elastic member 5.

The punch guide 1 is a cylindrical guide that is mounted on the punch press B and guides and holds the punch body 3 so as to reciprocate in the axial direction. In the case of a turret punch press as a specific example of the punch press B, the punch guide 1 is attached to the upper turret B2 and is arranged in line with the die C attached to the lower turret (not shown) via the die holder D. The
Further, the punch guide 1 has a cylindrical end portion 1a formed so as to overlap with a retainer 2 described later in the radial direction, and a first annular shape formed on a surface facing the retainer 2 in the radial direction at the cylindrical end portion 1a. Groove 1b .

The retainer 2 is a cylindrical body that is detachably attached to the cylindrical end 1 a of the punch guide 1 and holds an elastic member (spring) 5.
Furthermore, the retainer 2 is formed on a cylindrical portion 2a formed so as to overlap the cylindrical end portion 1a of the punch guide 1 in the radial direction, and a surface facing the first annular groove 1b of the cylindrical portion 2a in the radial direction. The second annular groove 2b is provided.
That is, the punch guide 1 and the retainer 2 are formed by inserting one of the cylindrical end 1a of the punch guide 1 and the cylindrical portion 2a of the retainer 2 in the axial direction with respect to the other, thereby forming the cylindrical end 1a. And the cylindrical portion 2a of the retainer 2 are connected so as to face each other in the radial direction.
It is preferable to provide a detent mechanism 7 between the punch guide 1 and the retainer 2.

In the case of the example shown in FIGS. 1 to 6 as specific examples of the punch guide 1 and the retainer 2, the tubular portion 2 a of the retainer 2 extends in the axial direction inside the tubular end portion 1 a of the punch guide 1. The outer groove is formed as the first annular groove 1b on the inner peripheral surface of the cylindrical end portion 1a, and the inner groove is formed as the second annular groove 2b on the outer peripheral surface of the cylindrical portion 2a.
As the anti-rotation mechanism 7, a guide groove 71 is provided in the inner surface of the cylindrical end portion 1 a of the punch guide 1, and a guide protrusion 72 that slides in the axial direction with the guide groove 71 is provided on the outer surface of the cylindrical portion 2 a of the retainer 2. It protrudes to.
Although not shown as another example, the cylindrical end portion 1a of the punch guide 1 is axially inserted into the cylindrical portion 2a of the retainer 2 in the axial direction, and the outer peripheral surface of the cylindrical end portion 1a is inserted into the outer peripheral surface. It is also possible to form an inner groove as the one annular groove 1b and form an outer groove as the second annular groove 2b on the inner peripheral surface of the cylindrical portion 2a. It is also possible to change the anti-rotation mechanism 7 to a structure other than the illustrated example.

The elastic body 6 is an elastically deformable fastening member that detachably connects the punch guide 1 and the retainer 2, and is formed across the first annular groove 1 b of the punch guide 1 and the second annular groove 2 b of the retainer 2. It is arranged so as to be movable with respect to the moving space S.
Further, the elastic body 6 includes a discontinuous annular portion 61 formed in an annular shape, a part of which is separated along the first annular groove 1b of the punch guide 1 and the second annular groove 2b of the retainer 2, and a discontinuous annular portion. And an extension portion 62 that is continuously formed at the separation end 61a of the 61 and elastically deforms the discontinuous annular portion 61 in the radial direction.
The discontinuous annular portion 61 of the elastic body 6 is formed in an annular shape along the first annular groove 1b and the second annular groove 2b by an elastically deformable hard material such as a spring material, and a part thereof is separated. The elastic ring is configured to be elastically deformed so that the separation end 61a approaches or separates, thereby expanding or reducing the diameter of the elastic ring.

Further, the discontinuous annular portion 61 of the elastic body 6 is installed in either the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2, and the first annular groove 1b or the second annular groove 2b. It is arrange | positioned so that movement toward the other of this is possible.
The extension part 62 of the elastic body 6 is continuously formed at any one or more of the separation ends 61a of the discontinuous annular part 61, and the separation ends 61a are moved closer to each other by the movement operation of the extension part 62, or The discontinuous annular portion 61 is configured to elastically expand in diameter or be deformed in a reduced diameter by being moved apart.

The discontinuous annular portion 61 of the elastic body 6 is in a stationary state in which the extension portion 62 is not moved and not deformed in the radial direction, and both the first annular groove 1b of the punch guide 1 and the second annular groove 2b of the retainer 2 are both. The first annular groove 1b of the punch guide 1 and the second annular groove 2b of the retainer 2 are disposed so as to be relatively immovable in the axial direction.
In addition to this, the discontinuous annular portion 61 is in a radially deformed state due to the movement operation of the extension portion 62, and either the first annular groove 1 b of the punch guide 1 or the second annular groove 2 b of the retainer 2 is punched into the punch. The first annular groove 1b of the guide 1 and the second annular groove 2b of the retainer 2 are disposed so as to be relatively movable in the axial direction.
In particular, the discontinuous annular portion 61 of the elastic body 6 has a first locking portion 61b that protrudes toward either the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2. Either one of the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2 has second locking portions 1c and 2c that engage with the first locking portion 61b in an uneven manner in the axial direction. Is preferred.
Further, in the discontinuous annular portion 61 of the elastic body 6, a plurality of extension portions 62 are continuously formed with respect to the plurality of separation ends 61 a, and the plurality of extension portions 62 are separated from each other or separated from each other. It is preferable to dispose the discontinuous annular portion 61 so as to be relatively close or movable so as to be elastically deformed in the radial direction.
In addition, the discontinuous annular portion 61 of the elastic body 6 is formed with a deformation starting point portion 63 formed on the opposite side of the plurality of separation ends 61a in the radial direction, and extending from the deformation starting point portion 63 to the plurality of separation ends 61a. And a plurality of arc portions 64. Thereby, by approaching or separating the plurality of separation ends 61a, it becomes possible to smoothly elastically change the diameter in the radial direction while maintaining the shape of the plurality of arc portions 64 around the deformation starting point portion 63.
Either the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2 facing the discontinuous annular portion 61 of the elastic body 6 in the radial direction, or the first annular groove 1b and the second of the retainer 2 It is preferable to provide positioning means 8 for supporting a part of the discontinuous annular portion 61 so as not to move in both of the two annular grooves 2b.

In the case of the example shown in FIGS. 1 to 6 as a specific example of the elastic body 6, by bending a wire made of an elastic material, a pair of extension portions are respectively formed on the pair of separating ends 61a in the discontinuous annular portion 61. 62 is continuously formed. An opening 1d in which a pair of extension portions 62 are movably disposed is formed in the tubular end portion 1a of the punch guide 1 disposed radially outside the tubular portion 2a of the retainer 2.
More specifically, in the case of the example shown in FIGS. 1, 2, and 5, the discontinuous annular portion 61 of the elastic body 6 is formed in a shape that partially overlaps in the circumferential direction, and along with that, is aligned in the axial direction. The pair of extending portions 62 are integrally formed so as to intersect with the pair of separating ends 61a arranged in the above, and are installed in the second annular groove 2b of the retainer 2. The discontinuous annular portion 61 is configured to elastically expand and deform toward the first annular groove 1b of the punch guide 1 by moving the pair of extending portions 62 in a direction approaching each other.
In the case of the example shown in FIG. 3 and FIG. 4, a pair of separation ends are formed such that the discontinuous annular portion 61 is formed in a shape in which a part thereof is separated in the circumferential direction and is separated in the circumferential direction in a stationary state. A pair of extension portions 62 are integrally formed substantially in parallel with 61 a and are installed in the first annular groove 1 b of the punch guide 1. The discontinuous annular portion 61 is elastically reduced in diameter and deformed toward the second annular groove 2b of the retainer 2 by moving the pair of extension portions 62 in a direction approaching each other.
On the other hand, in the case of the example shown in FIG. 6, the discontinuous annular portion 61 is formed in a shape in which a part thereof is spaced apart in the circumferential direction, and a pair of separations arranged in a stationary state and separated in the circumferential direction. A pair of extension portions 62 are integrally formed substantially in parallel with the end 61 a and are installed in the second annular groove 2 b of the retainer 2. The discontinuous annular portion 61 is elastically enlarged and deformed toward the first annular groove 1b of the punch guide 1 by moving the pair of extending portions 62 in a direction away from each other.
Although not shown as another example, in the discontinuous annular portion 61, only one extending portion 62 is continuously formed only at one separating end 61a, and the other separating end 61a of the discontinuous annular portion 61 is formed by the punch guide 1 or the like. The discontinuous annular portion 61 is elastically expanded by being fixed to the retainer 2 so as to be immovable and moving one separating end 61a toward or away from the other separating end 61a by operating one extension portion 62. It is also possible to change so as to deform or reduce the diameter.

Further, in the case of the example shown in FIGS. 1, 2, 5, and 6, a first locking portion that protrudes toward a second annular groove 2 b of the retainer 2 in a part of the discontinuous annular portion 61. A plurality of 61b are integrally formed, and in the second annular groove 2b of the retainer 2, several second locking portions 2c that are engaged with the first locking portions 61b in the axial direction are formed in a concave shape. .
On the other hand, in the case of the example shown in FIGS. 3 and 4, a plurality of first locking portions 61 b that protrude toward the first annular groove 1 b of the punch guide 1 are provided in a part of the discontinuous annular portion 61. A plurality of second locking portions 1c are formed in the first annular groove 1b of the punch guide 1 so as to be concavely engaged with the first locking portion 61b.
Further, in the case of the example shown in FIGS. 1 to 6, a bent portion 63 a is continuously formed as a deformation starting point portion 63 at a portion of the discontinuous annular portion 61 on the side opposite to the pair of separating ends 61 a in the radial direction. . When approaching or away from moving a pair of isolation edge 61 a and the extension portion 62 by the bent portion 63a, a pair of arcuate portions 64 across the bent portion 63a is elastically Hen径more smoothly in the radial direction.
A fitting recess 8a is formed as positioning means 8 in the first annular groove 1b of the punch guide 1 facing the bent portion 63a, and the bent portion 63a is positioned in a concave-convex manner with the fitting recess 8a.
Although not shown as other examples, the positioning means 8 is replaced with the fitting recess 8a, and the second annular groove 2b of the retainer 2 and the first annular groove 1b opposed to the bent portion 63a and the second annular groove 2b of the retainer 2 are arranged. It is also possible to form a fitting recess in both.

In addition, in the case of the example shown in FIGS. 1, 2, 5, and 6, the first locking portion 61 b of the elastic body 6 and the bent portion 63 a serving as the deformation starting point portion 63 can be elastically deformed. Positioning means 8 in which the bent portion 63a is concavo-convexly fitted with the second locking portion 2c of the retainer 2 that is formed into an arc shape by bending the wire in a curved manner, and the first locking portion 61b engages with the concavo-convex engagement. Are respectively formed in a circular arc shape.
On the other hand, in the example shown in FIGS. 3 and 4, the first locking portion 61b of the elastic body 6 and the bent portion 63a which becomes the deformation starting point portion 63 bend the elastically deformable wire linearly. Each of them is formed into a square shape by processing, and the second locking portion 1c of the punch guide 1 with which the first locking portion 61b engages with the concave and convex portions, and the fitting concave portion 8a of the positioning means 8 with which the bent portion 63a fits with the concave and convex portions. Are each formed in a concave shape in a square shape.
Although not shown in the drawings as another example, the shape of the bent portion 63a is changed to a different shape such as a square shape (V shape) instead of a square shape (U shape), or the deformation starting point portion 63 is further elastic. In order to facilitate the deformation, it is possible to make the diameter dimension of the deformation starting point portion 63 smaller or change than the thickness of the other discontinuous annular portion 61.

According to such a punch die A according to the embodiment of the present invention, as shown in FIGS. 1, 3, 5A and 6A, the extension 62 of the elastic body 6 is moved. In the stationary state in which the discontinuous annular portion 61 is not deformed in the radial direction along with this, the elastic body 6 is stretched over both the first annular groove 1b of the punch guide 1 and the second annular groove 2b of the retainer 2. A discontinuous annular portion 61 is arranged.
Thereby, the punch guide 1 and the retainer 2 are locked so as not to move in the axial direction across the discontinuous annular portion 61, and the attachment state of the punch guide 1 and the retainer 2 is maintained.
2, 4 and 5 (b) and 6 (b), the discontinuous annular portion 61 is elastically deformed in the radial direction in accordance with the moving operation of the extension portion 62, as shown in FIGS. Thus, the discontinuous annular portion 61 is disposed in either the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2.
Thus, non-continuous annular portion 61 does not become an obstacle, the punch guide 1 and the retainer 2 becomes movable in the axial direction, it is switched to a removable state of the punch guide 1 and the retainer 2.
Therefore, the punch guide 1 and the retainer 2 can be easily attached and detached by directly elastically deforming the discontinuous annular portion 61 of the elastic body 6 with the extension portion 62.
As a result, since the discontinuous annular portion 61 is directly elastically deformed by the extension portion 62, the discontinuous annular portion 61 can be reliably elastically deformed, and malfunction is less likely to occur, and the reliability and safety are excellent. The overall structure can be made compact and simple.

In particular, the discontinuous annular portion 61 of the elastic body 6 has a first locking portion 61b that protrudes toward either the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2. Either one of the first annular groove 1b of the punch guide 1 or the second annular groove 2b of the retainer 2 has second locking portions 1c and 2c that engage with the first locking portion 61b in an uneven manner in the axial direction. Is preferred.
In this case, the first locking portion 61b of the discontinuous annular portion 61 is moved to the first annular groove in a stationary state where the extension portion 62 of the elastic body 6 is not moved and the discontinuous annular portion 61 is not deformed in the radial direction. The retainer 2 is locked to the punch guide 1 so as to be immovable in the axial direction by engaging the concave and convex portions in the axial direction with the second locking portions 1c, 2c of either the 1b or the second annular groove 2b. The discontinuous annular portion 61 is elastically deformed in the radial direction by the movement of the extension portion 62 from this locked state, and the uneven engagement between the first locking portion 61b of the discontinuous annular portion 61 and the second locking portions 1c, 2c. By releasing the alignment, the retainer 2 can move in the axial direction with respect to the punch guide 1.
Therefore, the punch guide 1 and the retainer 2 are more securely locked in the axial direction by the concave and convex engagement between the first locking portion 61 b of the discontinuous annular portion 61 and the second annular groove 2 b of the punch guide 1 or the retainer 2. Can do.
As a result, errors in retaining the retainer 2 with respect to the punch guide 1 can be reduced, malfunctions are less likely to occur, and reliability and safety can be further improved.

Further, in the discontinuous annular portion 61 of the elastic body 6, a plurality of extension portions 62 are continuously formed with respect to the plurality of separation ends 61 a, and the plurality of extension portions 62 are separated from each other or separated from each other. It is preferable to dispose the discontinuous annular portion 61 so as to be relatively close or movable so as to be elastically deformed in the radial direction.
In this case, the discontinuous annular portion 61 is elastically deformed in the radial direction by moving the plurality of extension portions 62 relatively close to or apart from each other and causing the plurality of separation ends 61a to approach or separate from each other.
Therefore, the discontinuous annular portion 61 can be elastically deformed in the radial direction by a simple operation of the plurality of extending portions 62.
As a result, the structure of the elastic body 6 can be further simplified and the cost can be reduced.

Further, as in the example shown in FIGS. 3 and 4, the first locking portion 61 b and the bent portion 63 a are each formed into a square shape by linearly bending an elastically deformable wire that becomes the elastic body 6. In such a case, the first locking portion 61b and the bent portion are bent by bending the elastically deformable wire that becomes the elastic body 6, as in the examples shown in FIGS. 1, 2, 5, and 6. Compared with the case where 63a is formed in an arc shape, the first locking portion 61b and the bent portion 63a can be easily bent, and the accuracy of the bending is improved.
Therefore, the first locking portion 61b can be engaged with the second locking portion 1c with high accuracy, and the bent portion 63a can be engaged with the fitting recess 8a with high accuracy.

Next, each embodiment of the present invention will be described with reference to the drawings.
In the first embodiment, as shown in FIGS. 1 to 4, the extension portion 62 of the elastic body 6 is formed so as to extend in the radial direction of the punch guide 1 and the retainer 2, and the tip 62 a of the extension portion 62 is formed on the diameter 62. By projecting radially outward from the outer surface of the cylindrical end 1a of the punch guide 1 or the cylindrical portion 2a of the retainer 2 that overlap in the direction, the tip 62a of the extension 62 can be moved without a tool. It is a thing.
In the illustrated example, the distal end 62a of the extension 62 protrudes by a predetermined length from the opening 1d of the cylindrical end 1a of the punch guide 1 and the outer peripheral surface 1e serving as the outer surface, and the user extends with a finger or the like. By touching and moving the tip 62a of the part 62, the plurality of separating ends 61a approach each other, and the discontinuous annular part 61 is elastically expanded or contracted elastically.

More specifically, in the case of the example shown in FIGS. 1A and 1B and FIGS. 2A and 2B, a pair of extended ends are provided on the pair of separating ends 61a that overlap in the circumferential direction in the discontinuous annular portion 61. The parts 62 are integrally formed so as to cross each other. For this reason, the discontinuous annular portion 61 is elasticized by picking and moving the tips 62a of the pair of extension portions 62 protruding from the outer surface (outer peripheral surface 1e) of the cylindrical end portion 1a of the punch guide 1 with a finger. The diameter is expanded and deformed.
Further, in the case of the example shown in FIGS. 1A and 1B and FIGS. 2A and 2B, the discontinuous annular portion 61 is bent toward the second annular groove 2b of the retainer 2 and protrudes. A plurality of one locking portions 61b are integrally formed, and a plurality of second locking portions are engaged with the plurality of first locking portions 61b in the axial direction and the radial direction in the second annular groove 2b of the retainer 2, respectively. 2c is integrally formed.
In the case of the example shown in FIGS. 3A and 3B and FIGS. 4A and 4B, a pair of separating ends 61a arranged so as to be separated in the circumferential direction in the discontinuous annular portion 61 are paired with each other. The extension portion 62 is integrally formed substantially in parallel. For this reason, the discontinuous annular portion 61 is elasticized by picking and moving the tips 62a of the pair of extension portions 62 protruding from the outer surface (outer peripheral surface 1e) of the cylindrical end portion 1a of the punch guide 1 with a finger. The diameter is reduced.
Further, in the case of the example shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the discontinuous annular portion 61 is bent toward the first annular groove 1b of the punch guide 1 and protrudes. A plurality of first locking portions 61b are integrally formed, and a plurality of second engagements are formed in the first annular groove 1b of the punch guide 1 so as to be engaged with the plurality of first locking portions 61b in the axial and radial directions. The stop part 1c is integrally formed.

According to such a punch die A according to the first embodiment of the present invention, the user has the tip 62a of the extension 62 protruding from the outer surface (outer peripheral surface 1e) of the punch guide 1 or the retainer 2 overlapping in the radial direction. By performing a moving operation with a finger or the like, the attachment state in which the punch guide 1 and the retainer 2 cannot move in the axial direction and the detachable state in which the punch guide 1 and the retainer 2 can move in the axial direction can be easily switched.
Therefore, the discontinuous annular portion 61 of the elastic body 6 can be easily elastically deformed in the radial direction without using a tool.
As a result, there is an advantage that the punch guide 1 and the retainer 2 can be easily attached and detached with one touch, and the operability is excellent.

In the second embodiment, as shown in FIGS. 5 and 6, the distal end 62 a of the extension 62 of the elastic body 6 is arranged on the cylindrical end 1 a of the punch guide 1 or the cylindrical portion 2 a of the retainer 2 overlapping in the radial direction. The configuration arranged radially inward from the outer surface is different from the first embodiment shown in FIGS. 1 to 4, and the other configuration is the same as the first embodiment shown in FIGS. 1 to 4.
In the example of illustration, the front-end | tip 62a of the extension part 62 is substantially flush with the outer peripheral surface 1e used as the said outer surface in the opening 1d of the cylindrical end part 1a of the punch guide 1, or is more than an outer surface (outer peripheral surface 1e). When the user moves the distal end 62a of the extension 62 closer or away with a general tool E, the plurality of separated ends 61a approach or separate from each other, and the user does not move. The continuous annular portion 61 is elastically expanded or deformed elastically.

More specifically, in the case of the example shown in FIGS. 5A and 5B, the pair of extending portions 62 are integrated with the pair of separating ends 61 a that overlap in the circumferential direction in the discontinuous annular portion 61. Is formed. For this reason, the tip 62a of a pair of extension part 62 arrange | positioned in the opening 1d of the cylindrical edge part 1a of the punch guide 1 is picked by the pliers E1 as a general tool E, and is moved to move, thereby discontinuous annular The part 61 is elastically expanded and deformed.
In the case of the example shown in FIGS. 6A and 6B, the pair of extending portions 62 are integrated substantially in parallel with the pair of separating ends 61a disposed so as to be separated in the circumferential direction in the discontinuous annular portion 61. Is formed. For this reason, by inserting a screwdriver E2 as a general tool E and moving it away from the distal ends 62a of the pair of extension portions 62 arranged in the opening 1d of the cylindrical end portion 1a of the punch guide 1, it is not necessary to The continuous annular portion 61 is elastically expanded and deformed.
Further, although not shown as another example, the tip 62a of the extension 62 in the example shown in FIGS. 3A, 3B, 4A, and 4B is connected to the cylindrical end 1a of the punch guide 1. It is also possible to change the opening 1d so as to be accommodated radially inward from the outer surface (outer peripheral surface 1e).

According to the punch die A according to the second embodiment of the present invention, the discontinuous annular portion 61 of the elastic body 6 can be easily moved in the radial direction with a general tool E existing anywhere without using a special tool. It can be elastically deformed.
As a result, like the first embodiment, the punch guide 1 and the retainer 2 can be easily attached and detached with one touch, and there is an advantage that the operability is excellent.
Furthermore, since the tip 62a of the extension 62 does not protrude from the outer surface (outer peripheral surface 1e) of the punch guide 1 or the retainer 2 overlapping in the radial direction, the tip 62a of the extension 62 protrudes from the outer surface (outer peripheral surface 1e). Compared to the first embodiment, there is an advantage that it is possible to prevent an accident such as being caught on the tip 62a of the extension 62 projecting from the outer surface (outer peripheral surface 1e) and is excellent in safety.

In the previous embodiment, the cylindrical portion 2a of the retainer 2 is fitted in the axial direction with respect to the cylindrical end portion 1a of the punch guide 1, and the cylindrical portion 2a of the retainer 2 is disposed on the inside thereof. Although the cylindrical end portion 1a of the punch guide 1 is arranged on the outer side, the present invention is not limited to this, and the cylindrical end portion 1a of the punch guide 1 is inserted into the cylindrical portion 2a of the retainer 2 in the axial direction on the inner side. And the cylindrical edge part 1a of the punch guide 1 may be arrange | positioned on the outer side.
Furthermore, it replaces with the outer surface (outer peripheral surface 1e) of the cylindrical end part 1a of the punch guide 1 arrange | positioned on the outer side of the cylindrical part 2a of the retainer 2, and is arrange | positioned on the outer side of the cylindrical end part 1a of the punch guide 1. The distal end 62a of the extension 62 protrudes radially outward from the outer surface of the cylindrical portion 2a of the retainer 2, or the distal end of the extension 62 radially inward from the outer surface of the cylindrical portion 2a of the retainer 2. It is also possible to store and change 62a.
Further, in the examples shown in FIGS. 1, 2, 5, and 6, the first locking portion 61b and the bent portion 63a are respectively formed into arcs by bending the elastically deformable wire that becomes the elastic body 6 in a curved manner. Although it formed in the shape, it is not limited to this, You may change to a linear bending process and may form the 1st latching | locking part 61b and the bending part 63a in a square shape, respectively. In the example shown in FIGS. 3 and 4, the first locking portion 61 b and the bent portion 63 a are each formed into a square shape by linearly bending the elastically deformable wire that becomes the elastic body 6. Without being limited thereto, the first locking portion 61b and the bent portion 63a may be formed in an arc shape by changing to a curving process.

DESCRIPTION OF SYMBOLS 1 Punch guide 1b 1st annular groove 1c 2nd latching part 2 Retainer 2b 2nd annular groove 2c 2nd latching part 3 Punch body 3a Punch blade part 4 Punch head 5 Elastic member 6 Elastic body 61 Discontinuous annular part 61a Separation End 61b First locking part 62 Extension 62a Tip

Claims (3)

A punch guide formed in a cylindrical shape and having a first annular groove;
A retainer having a second annular groove attached to the punch guide so as to overlap in the radial direction and opposed to the first annular groove in the radial direction;
A punch body supported inside the punch guide and the retainer so as to be reciprocally movable in the axial direction and having a punch blade at an end thereof;
A punch head attached to the punch body;
An elastic member provided from the retainer to the punch head;
An elastic body provided in an elastically deformable manner across the first annular groove of the punch guide and the second annular groove of the retainer,
The elastic body is formed continuously at the separation end of the discontinuous annular portion, and the discontinuous annular portion formed in an annular shape partially separated along the first annular groove and the second annular groove. An extension part that elastically deforms the discontinuous annular part in a radial direction, and
The discontinuous annular portion is in a stationary state that is not deformed in the radial direction, and the punch guide and the retainer are relatively immovable in the axial direction across both the first annular groove and the second annular groove. The punch guide and the retainer can be moved relatively in the axial direction in either the first annular groove or the second annular groove in a state of radial deformation by the extension. And has a first locking part that protrudes toward either the first annular groove or the second annular groove,
Wherein one of the first annular groove and said second annular groove, punch, characterized in Rukoto to have a second locking portion for recess-projection engaging into the first locking portion in the axial direction. In the discontinuous annular portion of the elastic body, a plurality of the extension portions are formed continuously with respect to the plurality of separation ends, respectively, and the plurality of extension portions are arranged so that the plurality of separation ends approach or separate from each other. claim 1 Symbol placement punch die characterized in that the continuous annular portion is relatively moved closer or apart movably arranged to elastically deform in the radial direction. The extension portion of the elastic body is formed to extend in the radial direction of the punch guide and the retainer, and the distal end of the extension portion is radially outer than the outer surface of the punch guide or the retainer overlapping in the radial direction. claim 1 or 2 punching mold wherein it protrudes toward the.

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