JPH0924429A - Punch head of press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a punch head which is made needlessly to use a tool in changing the length of a punch and which can change the length of the punch correctly with a simple working in a press device. SOLUTION: This punch head is composed of a fixing nut 2 to screw and fix to the lower part of a screw 1a installed on the upper end of a punch, an intermediate ring 3 being arranged on the upper side of the fixing nut 2 and being able to engage to and to be separated from the fixing nut 2, and a head member 4 to energize and hold the intermediate ring 3 being up and down movable and unable to rotate, and to change the length of the punch by engaging with screwing to the upper part of the screw 1a of the punch. When the intermediate ring 3 is pulled up, the intermediate ring 3 is separated from the engaged state with the fixing nut 2, the intermediate ring 3 and the head member 4 are made able to rotate and the length of the punch can be changed with the rotation of the head member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch head which can easily change the punch length in a press device without using a tool.

[0002]

2. Description of the Related Art In a press machine, the length of a punch is changed according to the thickness of a material to be processed. The punch head is mounted on the upper end of the punch and the punch head is operated. It is normal to change the length of the whole punch. Although various types of punch heads have been conventionally used, they are formed so that a tool is used to fix the punch head to the punch when the length of the punch is changed. . That is, there is a conventional punch head as shown in FIGS. 7 to 14, for example.

In the conventional punch head described above, the punch head A shown in FIGS. 7 and 8 is provided with a slit a in its thickness direction, and the width of the slit a is narrowed by a screw a1 and fixed to the punch P. In the punch head B shown in FIGS. 9 and 10, the slit b is provided in the direction orthogonal to the thickness, and the width of the slit b is narrowed by the screw b1 and fixed to the punch P as described above. What was done, Figure 11,
The punch head C shown in FIG. 12 is fixed to the punch P with bolts c. The punch head D shown in FIGS. 13 and 14 is provided with a screw hole d in a direction orthogonal to its thickness and is attached to the punch P. After that, the screw d1 is screwed into and fixed in the screw hole d.

All of the punch heads described above require a tool to change the length of the punch, and the punch heads A, B, and D cannot change the length of the punch P exactly to the desired length. The punch head B has a problem that it cannot be fixed to the punch P when the slit b is disengaged from the screw portion Pa of the punch P. When the punch head C changes the length of the punch, it must be removed from the punch P. In addition, when changing the length greatly, a spacer inserted between the punch head C and the punch P is required, and further,
The punch head D has a problem that the screw parts d and d1 are easily broken.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention does not require the use of a tool when changing the length of the punch, and the length of the punch can be changed accurately by a simple operation. It is an object of the present invention to provide a punch head that can be used.

[0006]

The punch head of the present invention, which has been made for the purpose of solving the above-mentioned problems, has a fixing nut for screwing and fixing the lower part of a screw provided at the upper end of the punch. An intermediate ring which is disposed on the fixing nut and which can be engaged with and disengaged from the fixing nut; an intermediate ring which is vertically slidable and non-rotatably urged and held downward; and an upper part of the screw of the punch. It is composed of a head member that is screwed to the punch to change the length of the punch. When the intermediate ring is pulled up, the intermediate ring is disengaged from the engagement state with the fixed nut, and the intermediate ring and the head member are rotatable. The length of the punch can be changed by rotating the head member.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A punch head according to the present invention has a fixing nut, which is screwed and fixed to a lower portion of a screw provided on an upper portion of the punch, and is provided with a plurality of engaging holes at regular intervals. An intermediate ring engaged with any of the engagement holes,
A spring is interposed with a head member that is screwed on the upper part of the screw of the punch with a spring interposed, and the head ring and the head member are integrally connected to each other so that the intermediate ring can repel the spring. By pulling up against it, the intermediate ring is released from the engagement state with the fixed nut so that the intermediate ring can rotate integrally with the head member, and the rotation of the intermediate ring causes the head member to rotate to include the head member. You can change the punch length.

Therefore, no tool is required to change the length of the punch, and a scale corresponding to the engaging hole of the fixing nut is attached to the outer periphery of the lower portion of the intermediate ring, and the fixing nut is provided with a reference line. You can see the length of the punch and change it accurately.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of an example of the punch head of the present invention, FIG. 2 is a vertical cross-sectional front view in which the intermediate ring is engaged with a fixing nut and the punch length is fixed, and FIG. 3 is a line AA in FIG. FIG. 4 is a cross-sectional view of the state in which the intermediate ring is pulled up from the state of FIG. 2 to disengage the fixing nut from the state of FIG. 2, and FIG. 6 is a cross-sectional view of the state in which the length of the punch is changed by rotating it toward one side, and FIG.
It is a sectional view of a state where the pulling up of the intermediate ring is released from the above state and the intermediate ring is engaged with the fixing nut.

In the figure, 1 is a rod of a punch, 1a is a screw provided on the upper portion of the rod 1, and 2 is a fixing nut screwed to the lower portion of the screw 1a and fixed to the rod 1 by a bolt 2a. A circular projecting edge 2b is provided on the base plate, a large number of engaging holes 2c are provided on the projecting edge 2b at appropriate intervals, and a reference line 2d is engraved at an appropriate location on the outer circumference. The fixing position of the fixing nut 2 is set so that the punch length is the shortest within the adjustment range.

Reference numeral 3 denotes an intermediate ring arranged on the fixed nut 2, and one engaging hole of the fixed nut 2 is provided on the lower surface thereof.
A protrusion 3a that fits into the fixed nut 2 and fits into the fixed nut 2 is provided. Further, a spring receiver 3b and a screw hole 3c are provided on the upper surface, and the lower outer circumference is aligned with the reference line 2d of the fixed nut 2. For example, a scale 3d indicating the length of the punch is engraved.

Reference numeral 4 denotes a head member which is screwed onto the screw 1a of the punch rod 1 from above the intermediate ring 3 and which is provided with a spring receiver 4a and a bolt mounting hole 4b, and an appropriate distance m is provided between the intermediate ring 3 and the spring receiver 4a. With the spring 5 interposed between the stationary spring receivers 4a and 3b, the bolt 6 is inserted through the bolt mounting hole 4b.
The intermediate ring 3 is connected by screwing the tip of the intermediate ring 3 into the screw hole 3c of the intermediate ring 3.
Is pulled up, the protrusion 3a of the intermediate ring 3 is disengaged from the engagement hole 2a of the fixed nut 2 to release the engagement state with the fixed nut 2, and the intermediate ring 3 can rotate together with the head member 4. It is supposed to be.

The punch head of one example of the present invention is constructed as described above, and its operation will be described as follows. First, FIG. 2 shows a state in which the punch length is set to a predetermined length. To change the punch length from this state to a longer length, the intermediate ring 3 is pulled upward, As shown in FIG.
When the engagement state is released by removing 3a from the engagement hole 2c of the fixed nut 2, the intermediate ring 3 becomes rotatable.

Then, the intermediate ring 3 is rotated to the left, the scale 3d of a desired length is aligned with the reference line 2d of the fixing nut 2, and the force for pulling up the intermediate ring 3 is removed. Fits in the engaging hole 2c corresponding to the length of the punch, and the intermediate ring 3
Is engaged with the fixed nut 2, but the punch head 4 rotates integrally with the intermediate ring 3 and is unscrewed from the screw 1a to be positioned at a higher position, so that the punch length is longer than the original length. Since it is fixed to a long desired length, the length of the punch can be changed by so-called one-touch without using any tool.

FIGS. 5 and 6 show a state in which the punch length is set in a state in which the intermediate ring 3 is rotated 180 degrees to the left, but these figures are for the sake of easy explanation. Therefore, in actual use, if the desired scale 3d is aligned with the reference line 2d, the punch length will be the desired length.

Incidentally, in the present invention, the scale for adjusting the reference line 2d to the fixing nut 2 and the reference line 2d to the intermediate ring 3
Although 3d is provided respectively, these may not be provided. However, it goes without saying that it is possible to change the punch length more accurately by providing them.

[0017]

The present invention is as described above, and a fixing nut is attached to the lower part of the screw provided on the upper part of the punch,
A head member in which an intermediate ring that can be engaged and disengaged with the fixing nut is attached so as to be vertically slidable and non-rotatable so that the intermediate ring is engaged with the fixing nut and screwed onto the upper portion of the screw of the punch. Therefore, when the length of the punch is changed, the intermediate ring is pulled upward to release the engagement with the fixed nut, and the intermediate ring is rotated, the head member is integrally rotated, and a tool is particularly used. You can easily change the punch length by so-called one-touch operation. If the fixing nut is provided with a reference line and the intermediate ring is provided with a scale, the punch length can be changed extremely accurately.

[Brief description of drawings]

FIG. 1 is a front view of an example of a punch head of the present invention.

FIG. 2 is a vertical cross-sectional front view of a state in which a punch length is fixed by engaging an intermediate ring with a fixing nut.

FIG. 3 is a view taken along the line AA of FIG. 2;

FIG. 4 is a cross-sectional view of a state in which the intermediate ring is pulled up from the state of FIG. 2 and the engagement with the fixing nut is released.

FIG. 5 shows the intermediate ring and the head member from the state of FIG.
Sectional drawing of a state where the length of the punch is changed to be longer by rotating it to the left.

FIG. 6 is a cross-sectional view showing a state in which the intermediate ring is lifted up from the state of FIG. 5 and the intermediate ring is engaged with a fixing nut.

FIG. 7 is a plan view of an example of a conventional punch head.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a plan view of another example of the conventional punch head.

FIG. 10 is a front view of FIG. 9.

FIG. 11 is a plan view of another example of the conventional punch head.

FIG. 12 is a front view of FIG. 11.

FIG. 13 is a plan view of still another conventional example.

FIG. 14 is a front view of FIG. 13.

[Explanation of symbols]

 1 Punch rod 1a Screw 2 Fixing nut 2a Bolt 2b Projection edge 2c Engagement hole 2d Reference line 3 Intermediate ring 3a Protrusion 3b Spring receiver 3c Screw hole 3d Scale 4 Head member 4a Spring receiver 4b Bolt mounting hole 5 Spring 6 bolt

Claims (4)

[Claims] 1. A fixing nut screwed and fixed to a lower portion of a screw provided on an upper end of a punch, an intermediate ring arranged on the fixing nut and engageable with and disengageable from the fixing nut, and the intermediate ring. Comprises a head member capable of vertically sliding and non-rotatably urged downward to change the length of the punch by being screwed onto the upper portion of the screw of the punch. The punch head of a press device, wherein the ring is disengaged from the engagement state with the fixed nut, the intermediate ring and the head member are rotatable, and the length of the punch can be changed by rotating the head member. . 2. The punch head according to claim 1, wherein the fixed nut is provided with an appropriate number of engaging holes at regular intervals, and the intermediate ring is provided with a protrusion that engages with any of the holes. 3. The intermediate ring is held by being urged downward by a spring by a head member and is pulled up to be disengaged from an engagement state with a fixed nut so that the intermediate ring can rotate integrally with the head member. The punch head according to Item 1 or 2. 4. The punch head according to claim 1, wherein a scale is provided on the outer circumference of the intermediate ring, and a reference line is provided on the fixing nut.