JPH10244331A - Punch unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch unit which can be rapidly dis-assembled and whose punch length can be easily regulated. SOLUTION: An intermediate member 45 arranged between a guide bush 12 and a compression spring is provided with an annular wall 40, a supporting member 59 arranged like a concentric circle with the annular wall 40. The annular wall 40 is able to rotate, it moves a holding means to a lock position and an unlock position by rotating. In the lock position, the guide bush is moved to the longitudinal direction and made without being detached from the supporting member. In the unlock position, the guide bush can be detached from the supporting member. An index pin arranged inside the intermediate member is engaged to the selected seat among rotation preventing seats installed on the guide bush, with this, the rotation position of the guide bush is stabilized, and further, the punch length regulated with a screw mechanism can be also stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch unit, and more particularly to a punch unit capable of quickly removing and replacing a punch without using a tool, and easily adjusting the length of the punch. .

[0002]

BACKGROUND OF THE INVENTION In general, a punch unit includes a punch driver connected to a punch. The punch driver has a head at its back end, and also has means for preventing relative rotation between the punch and the punch driver during the stroke of the punch. The back end of the punch is usually a screw that is screwed into a hole provided in the front end of the punch driver. A pre-loaded compression means, such as a compression spring, is mounted between the punch head and the guide bush receiving the punch, the compression means serving to return the punch and punch driver to a rearward position. I have. In general, the guide bush is connected to the other parts of the punch unit in a manner that makes it difficult to remove and replace the punch. The procedure for adjusting the length of the punch is also generally cumbersome.

[0003] Therefore, there is a need to provide an improved punch unit with simple means for removing the guide bush. There is also a need for a simple means for adjusting the length of the punch.

[0004]

SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide a punch unit that allows for easier and quicker loading and unloading of punches.

According to a preferred embodiment of the present invention, a punch unit includes a punch driver having a front end and a back end. The punch head is located at the back end of the punch driver, and the punch is connected to the front end of the punch driver. The guide bush receives the punch and guides the movement of the punch in the axial direction. The punch unit further includes means for preventing rotation of the punch with respect to the guide bush during the punch operation. The compression spring serves to move the punch away from the guide bush. The intermediate member is an annular wall,
And a support member arranged concentrically inside the annular wall. The support member includes a detachable holding means for holding the guide bush inside. The annular wall is rotatable, and rotation in the first direction moves the holding means to the locked position. In the locked position, the guide bush is prevented from moving longitudinally and coming off the support member. Rotation of the annular wall in a second direction opposite to the first direction moves the holding means to an unlocked position. In the unlocked position, the guide bush can be removed from the support member.

[0006] Preferably, the holding means is in the form of a holding ball which moves in a hole provided in the side wall of the support member, and in the locked position, the annular wall presses the holding ball inwardly into the support member, thereby cutting the holding ball. The two lip portions forming the notch are engaged with the guide bush. In the unlock position, the holding ball moves outward in a direction away from the guide bush and enters a notch provided on the side wall of the annular wall. The holding means may include a lock spring for biasing the annular wall to the lock position.

In a preferred embodiment, the holding means is moved to a lock position by a lock mechanism pin means provided inside the support member. The locking mechanism pin prevents the annular wall from rotating with respect to the support member in the unlocked state. The locking mechanism pin engages the guide bush while being inserted into the support member.

[0008] The punch unit according to the present invention includes index means for controlling the relative rotation of the guide bush with respect to the support member. The index means
The guide bush moves between a fixed position where rotation between the guide bush and the support member is prevented and a release position where the guide bush and the support member can rotate with respect to each other. The indexing means may comprise means for independently adjusting the rotation of the guide bush with respect to the intermediate member so that the length of the punch can be adjusted independently. Means for enabling independent adjustment of the rotation are generally associated with an anti-rotation seat provided at a position measured along the circumference of the guide bush and one of the anti-rotation seats. It is constituted by index pins provided on the intermediate member for matching.

Accordingly, an object of the present invention is to provide a punch unit capable of removing and replacing a punch through the fact that a guide bush can be easily disassembled and removed.

[0010] Another object of the present invention is to provide a punch unit that can rotate the guide bush independently and can recognize a change in the length of the punch.

Yet another object of the present invention is a fixing means which can be easily accessed and which can be easily operated.
The purpose of the present invention is to provide a means arranged outside the punch unit for selectively allowing or stopping the rotation of the guide bush with respect to the punch head.

[0012] These and other objects of the present invention will become apparent from the following detailed description.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, like parts are designated by like numerals throughout the several views. Punch unit 1 shown in FIG.
Is provided with a punch 10 that is guided linearly so as to be detachable from a guide bush 12. Anti-rotation means, such as pins 14, fixed to the punch 10 and engaged in longitudinal grooves 16 inside the guide bush 12, prevent rotation of the punch 10 relative to the guide bush 12. The axial groove 17 is open radially outward, so that means (not shown) on the machine frame can be engaged from the outside and the guide bush 12 can be rotated without rotating the guide bush 12. Can be held. The stripper plate 18 is detachably fixed to the lower end of the guide bush 12.

A base end or an upper end of the punch 10 is connected to a punch driver 22. A screw connection is provided between the punch 10 and the punch driver 22 so as to compensate for the length loss due to the consumption or wear of the punch,
This makes it possible to adjust the length of the punch. In the embodiment shown in FIG. 1, a screw hole 23 is provided at the base end of the punch 10.
, A punch driver 2 having a screw 25 on the outside
The two tips 24 are screwed. The total length of the punch 10 and the punch driver 22 can be set by turning the tip 24 of the punch driver 22 inserted in the screw hole 23 of the punch 10 to change the length of the tip.

A punch head 26 provided at a base end of the punch driver 22 receives a force generated by a punch machine (not shown) for operating the punch unit 1. The punch head 26 acts as a back stop surface that receives a force from a pressing unit such as a compression spring 29 that urges the punch driver 22 rearward from the guide bush 12. The spring 29 can be arranged inside the bushing 28. The inner diameter of the compression spring 29 can be guided through the shaft of the punch 10 and the punch driver 22.

The bushing 28 is connected and fixed to the base end or the upper end of the intermediate member 45 by frictional engagement with the lip 60. The punch driver 22 extends through the central opening into the intermediate member 45, and is stably held in the central member 45 by the C-clamp 21. On the other hand, the guide bush 12 is connected to the intermediate member 45 in such a manner as to be rotatable with respect to the intermediate member 45, that is, rotatable with respect to the bushing 28. In the preferred embodiment shown in FIGS. 2 and 3, the upper end 31 of the guide bush 12
Has a large number of anti-rotation seats 30 arranged so as to increase at regular intervals along the circumference. Anti-rotation seat 30
Has a depth sufficient to receive an index pin 51 located within the intermediate member 45 as best shown in FIGS.

The intermediate member 45 includes an outer annular wall 40 and an inner support member 59 disposed concentrically inside the annular wall 40.
And Between the locked position in which the guide bush 12 is held in the support member 59 and the unlocked position in which the guide bush 12 can be removed, as described in more detail below in connection with FIGS. The annular wall 40 rotates with respect to the support member 59 by a certain angle. The index pin 51 is fixed to the radial projection 50 of the support member 59, and the radial projection 50 is accessible to the index guide groove 4 of the annular wall 40.
9 extend through.

FIGS. 4 to 6 show the operation of the index pin 51. FIG. The intermediate member 45 in the unlock position is shown. The index pin 51 is shown in a normal position, that is, in a state of being deflected downward by a spring (not shown) and extending outward from the bottom surface 46 of the support member 59. When the guide bush 12 is inserted into the support member 59, the index pin 51 moves to a fixed position, and one of the rotation prevention seats 30 is moved to prevent relative rotation between the guide bush 12 and the intermediate member 45. Into one.
By rotating the guide bush 12 with respect to the intermediate member 45,
In order to adjust the length of the punch, the index pin 51 may be moved upward against the biasing spring force. This can be done by moving the radial projection 50 upward to the release position so that the index pin 51 is flush with the bottom surface 46 or inside the bottom surface 46 as shown in FIG. Become. Thus, the guide bush 12 can select and rotate the scale by the amount of increasing or decreasing the length of the punch. When the radial projection 50 is released, the index pin 51 enters another anti-rotation seat and returns to the fixed position.
2 and the intermediate member 45 are prevented from rotating relative to each other. Pin 51
Is also shown in FIG.

As shown in FIG. 6, the longitudinal movement of the index pin 51 causes the side wall 61 of the support member 59 to move.
The radial projection 50 extends through the first internal guide groove 75. The first guide pin 55 attached to the wall surface 61 of the support member 59 extends outward through the first external guide groove 57 of the annular wall 40, thereby guiding the rotational movement of the annular wall 40 with respect to the support member 59. . The second guide pin 56 is similarly positioned about 180 degrees opposite to the first guide pin 55 for a similar purpose, and is shown in FIGS. 9-11 and described in detail below. As the second
The guide pin 56 extends through the second outer guide groove 58 of the annular wall 40.

FIGS. 7 to 12 show fixing and disassembling means of the guide bush. Referring to FIGS. 7 and 8, the support member 59 further includes a detachable holding means for detachably holding the guide bush. Thus, the guide bush can be quickly removed from another portion of the punch unit 1 without using a tool. Therefore,
When the punch 10 is worn, it can be easily removed or replaced with a punch of another shape. Preferably, the detachable holding means comprises a side wall 61 of the support member 59.
A hole 62 extending radially therethrough, and a retaining ball 63 having a diameter exceeding the thickness of the side wall 61 and mounted in the hole 62.
And The retaining ball 63 can move in the hole 62, but does not jump out of the hole because its diameter is smaller than the hole 62. (The holes 62 are shown larger in the figure than the diameter of the retaining ball 63 for illustrative purposes only.) In the embodiment shown, there are four retaining balls, but more or less. Is also good. FIG.
When the guide bush 12 is sufficiently inserted into the support member 59 such that the upper end 31 of the guide bush 12 is near the bottom surface 46 of the support member as shown in FIG. 7, the annular wall 40 as shown in FIG. Pushes the holding ball 63 outward toward the guide bush 12. As a result, the holding ball 63 is firmly held in the notch 47 (see also FIG. 3) between the second inclined edge 34 and the stop surface 36, and the guide bush 12 can be rotated with respect to the support member 59. The guide bush 12 is not detached from the intermediate member 45 as much as possible.

In order to remove the guide bush 12 from the intermediate member 45, the position of the annular wall 40 with respect to the support member 59 only needs to be rotated from the position shown in FIG. 10 to the position shown in FIG. Due to this rotation, the notch 4 inside the annular wall 40 is formed.
1 is arranged in a radial direction with the holding ball 63 as shown in FIG. The angle at which the annular wall 40 is rotated with respect to the support member 59 is fixed at the end of the L-shaped guide groove 73 of the annular wall 40. The support member 5 passes through the L-shaped guide groove 73.
The lock mechanism guide pin 72 provided on the extension 9 extends. When the annular wall 40 is rotated from the position shown in FIGS. 10 and 7 to the position shown in FIGS. 9 and 8, the locking mechanism guide pin 72 is moved to the short side portion 78 of the L-shaped guide groove 73.
Descends. Then, the locking pin 70 attached to the lock mechanism guide pin 72 is lowered by the action of the biasing spring 52 and presses the upper end 31 of the guide bush 12. At the same time, during this movement, the first inclined edge 34
3 is pressed, and the holding ball 63 is formed from the outer portion 33 into the hole 62.
The holding ball 63 moves into the notch 41.
Therefore, when the locking pin 70 moves so as to be disengaged from the bottom surface 46 of the support member, the guide bush 12 is pushed out of the support member 59 and can be removed from the punch unit 1.

Conversely, when the guide bush 12 is inserted into the support member 59, the upper surface 31 presses the locking pin 70, compresses the urging spring 52, and locks the guide pin 72.
Is displaced upward from the short side portion 78. To further facilitate the insertion of the guide bush 12 into the intermediate member 45, the outer rim of the upper end 31 of the guide bush 12 forms a second inclined edge 32 which notches the retaining ball 63. It acts to push it into the hole 62 toward 41 so that the outer part 33 can pass through the holding ball 63. When the pin 72 moves out of the short side 78, the spring 66 (see FIGS. 11 and 12) can rotate the annular wall 40 with respect to the support member 59, and the pin 72 is Move to the end. As described above with reference to FIGS. 7 and 8, the annular wall 40 holds the holding ball 63 outward against the guide bush 12, and the holding ball 63 is
4 is firmly held in a notch 47 formed between the stop surface 36 and the guide bush 12 and the intermediate member 45.
From being removed from As shown in FIG. 11, the movement of the lock mechanism 70 is guided by the second internal guide groove 74 in the side wall 61 of the support member 59. A lock mechanism guide pin 72 extends through the side wall 61 of the support member 59.

In order to ensure that the intermediate member 45 remains in the lock position, that is, to prevent the lock mechanism guide pin 72 from inadvertently coming out of the long side end 77 of the L-shaped guide groove 73, the lock spring 71 is provided. Biases the annular wall 40 toward the lock position. Lock spring 71
Is the support member 5 as shown most clearly in FIG.
9 is held in a lock spring holding groove 66. In a preferred embodiment, the lock spring holding groove 66 is
9 extends around 160 degrees. The first end 42 of the lock spring 71 is fitted in the shelf 44 of the support member 59, and the second end 43 is fixed to an anchor pin 67 on the annular wall 40. Preferably, the lock spring 71 is held so as to be more compressed in the locked state than in the unlocked state. When the lock mechanism guide pin 72 enters the leg 78 of the L-shaped groove 73, the lock mechanism guide pin 72 is pushed toward the long side end 77 of the L-shaped guide groove 73 by the urging action of the lock spring 71.

Although the present invention has been described in considerable detail with regard to preferred embodiments thereof, it will be apparent to those skilled in the art that changes and modifications can be made without departing from the spirit and scope of the claimed invention. That is.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a punch in a completely assembled state.

FIG. 2 is a plan view showing the guide bush with a punch removed, and is a plan view taken along line 2-2 of FIG.

FIG. 3 is a side view of the guide bush with a punch removed.

FIG. 4 is a side view of an intermediate member of the punch unit,
It is the figure which showed a part by the cross section of the index means in a lock position.

FIG. 5 is a view similar to FIG. 4, showing a state in an unlock position.

FIG. 6 is a side view similar to that shown in FIG. 4, but with the annular wall removed.

FIG. 7 is a sectional view taken along the line 7-7 in FIG. 1;

8 is a sectional view similar to FIG. 7, showing a state in which a guide bush is removed.

9 is a side view showing a partial cross section of the intermediate member of the punch unit in a state where the guide bush is removed and the intermediate member is rotated by about 90 degrees from the viewpoint of FIGS. It is a figure showing a means.

FIG. 10 is a side view similar to FIG. 9, showing a state in which a guide bush is inserted and is in a lock position.

FIG. 11 is a side view similar to FIGS. 9 and 10, showing a state where an annular wall is removed.

FIG. 12 shows a state in which the punch driver is removed;
FIG. 12 is a diagram illustrating a cross section taken along line 12-12 of FIG. 11.

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[Procedure amendment]

[Submission date] September 22, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 6

FIG. 4

FIG. 5

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

FIG.

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 597046063 O. Box 728 6400 Industory Avenue Ramsey Minnesota 55303 Untitled States of America

Claims (20)

[Claims] A punch driver having a front end and a back end; a punch head disposed on the back end of the punch driver; and a punch having a back end connected to the front end of the punch driver. A guide bush for receiving the punch to guide the axial movement of the punch; a means for preventing the punch from rotating with respect to the guide bush during a punch operation; and a punch driver rearward from the guide bush. And a middle member between the guide bush and the compression means, the middle member comprising an annular wall and a support member disposed inside the annular wall. The support member has detachable holding means for detachably holding the guide bush. , The annular wall is rotatable relative to the support member,
Rotation in the first direction moves the holding means to a locked position where the guide bush is prevented from coming off the support member, and rotation of the annular wall in a second direction opposite to the first direction. A punch unit for moving said holding means to an unlock position where said guide bush can be removed from said support member. 2. The holding means is in the form of a holding ball which moves in a hole provided in a side wall of the support member, and in the locked position, the annular wall presses the holding ball inward into the support member to guide the guide bush. 2. The punch unit according to claim 1, wherein the holding ball moves outward in a direction away from the guide bush in the unlock position. 3. The device according to claim 3, wherein the annular wall has a notch on a side wall near the support member, and the holding ball can move to the notch in the unlock position. The punch unit according to claim 2. 4. The punch unit according to claim 2, wherein the guide bush has two lip portions forming a notch therebetween for receiving the holding ball. 5. The punch unit according to claim 1, wherein said holding means includes a lock spring for urging the annular wall to a lock position. 6. The lock spring is housed in a holding groove provided on a side wall of the support member, and the lock spring is in contact with the holding groove at one end, and is in contact with the annular wall at another end. The punch unit according to claim 5, wherein: 7. The holding means can be moved to the lock position by a means serving as a lock mechanism pin inside the support member, and the guide mechanism is provided while the lock mechanism pin is inserted into the support member. The punch unit according to claim 1, wherein the punch unit is engaged with the bush. 8. The lock mechanism pin is attached to a lock mechanism guide pin, and the lock mechanism guide pin is provided on the annular wall to stop and allow movement of the annular wall with respect to the support member, respectively. 8. The punch unit according to claim 7, wherein the punch unit can move between a short side and a long side of the L-shaped groove. 9. The support member includes at least one guide pin extending outward from a side wall of the support member,
The guide pin is a groove extending along a peripheral edge of the annular wall and penetrates a groove corresponding to the guide pin, and guides the movement of the annular wall with respect to the support member. The punch unit according to 1. 10. The punch unit further includes index means for controlling relative rotation of the guide bush with respect to the support member, wherein the index means controls rotation between the guide bush and the support member. The punch unit according to claim 1, wherein the punch unit can move between a prohibited fixing position and a release position where the guide bush and the support member can rotate with respect to each other. 11. The indexing means comprises means for independently adjusting the rotation of the guide bush with respect to the intermediate member, whereby the length of the punch can be adjusted independently. Claim 10
The punch unit described. 12. The means for independently adjusting rotation includes an anti-rotation seat located at a location measured along a periphery of the guide bush, and a selected one of the anti-rotation seats. The punch unit according to claim 11, further comprising an index pin provided on the intermediate member for engaging. 13. The method according to claim 13, wherein the index pin is movable between the fixed position and the release position by radial projection means attached to the index pin and extending outwardly from the annular wall. 13. The punch unit according to claim 12, wherein: 14. A punch having a front end and a back end, a punch head disposed on the back end of the punch driver, and a punch having a back end connected to the front end of the punch driver. A guide bush for receiving the punch to guide the axial movement of the punch; a means for preventing the punch from rotating with respect to the guide bush during a punch operation; and a punch driver rearward from the guide bush. Compression means for separating the guide bush from the intermediate member, and (1) a lock position in which the guide bush cannot be removed from the intermediate member; Can move between unlockable positions that can be removed And (2) index means for controlling the relative rotation of the guide bush with respect to the intermediate member. The detachable holding means, when in the locked position, is provided with respect to the intermediate member. Allowing relative rotation of the guide bush, wherein the indexing means is between a fixed position where the rotation of the guide bush and the intermediate member is stopped, and a release position where the guide bush and the intermediate member can rotate with respect to each other; A punch unit characterized in that the punch unit can be moved. 15. The intermediate member includes an annular wall and a support member arranged concentrically with the annular wall, the detachable holding means is arranged within the support member, and the annular wall is provided. Is rotatable with respect to the support member,
Rotation in the first direction moves the holding means to a locked position where the guide bush is prevented from moving in the longitudinal direction and coming off the support member, and a second direction opposite to the first direction. 15. The punch unit according to claim 14, wherein the rotation of the annular wall moves the holding means to an unlock position where the guide bush can be removed from the support member. 16. The holding means is in the form of a holding ball that moves in a hole provided in a side wall of the support member, and in the locked position, the annular wall presses the holding ball inward into the support member to guide the guide bush. In the unlock position, the holding ball moves outward in a direction away from the guide bush and enters a notch provided on the side wall of the annular wall near the support member. The punch unit according to claim 15. 17. The punch unit according to claim 16, wherein the guide bush has two lip portions forming a notch therebetween for receiving the holding ball. 18. The holding means includes a lock spring for urging the annular wall to a lock position, the lock spring being housed in a holding groove provided on a side wall of the support member, wherein the lock spring is 17. The punch unit according to claim 16, wherein one end is in contact with the holding groove, and the other end is in contact with the annular wall. 19. The holding means can be moved to the lock position by a means serving as a lock mechanism pin inside the support member, and the guide mechanism is provided while the lock mechanism pin is inserted into the support member. A bush, and the lock mechanism pin is attached to a lock mechanism guide pin. The lock mechanism guide pin is configured to prohibit and allow movement of the annular wall with respect to the support member. 15. The punch unit according to claim 14, wherein the punch unit can move between a short side portion and a long side portion of the L-shaped groove provided in the punch unit. 20. The intermediate member and the indexing means include means for independently adjusting the rotation of the guide bush relative to the intermediate member, thereby independently adjusting the length of the punch. The means for independently adjusting the rotation may include an anti-rotation seat provided at a location measured along a periphery of the guide bush, and a selected one of the anti-rotation seats. An index pin provided on said intermediate member for engagement, said index pin being attached to said index pin and by means of a radial projection extending outwardly from said annular wall, The punch unit according to claim 14, wherein the punch unit is movable between the fixed position and the release position.