JPH0386499A - Punching device - Google Patents

Abstract

PURPOSE:To automatically position a relative relation between a punch and stripper, by providing a guide freely slidably on the outer periphery of a punch holder and fixing the stripper to the lower face of this guide. CONSTITUTION:A cylinder is driven after the member 25 to be worked to a specific position and an upper plate 8 is descended. Then a stripper 15 is abutted on the member 25 to be worked and since the stripper 15 can not be descended further, a stripper arm 16 is rocked while compressing an energizing spring 19 and a punch holder 12 is descended by sliding inside a guide 14. At this time piercing is executed on the part 25 to be worked by a punch 13. When the punching is completed with the tip face of the punch holder 12 being abutted on the abutment part 15b of the stripper 15, the shaft 9 of the cylinder is retreated, the punch 13 is ascended, the tip of the punch 13 is drawn from the member 25 and comes into the insertion hole of the stripper, then, the tip of an adjusting screw is abutted on a holder receiver 10 and the guide 14 and stripper 15 are ascended as well together with the punch 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a punching device used for punching holes in various plate materials such as printed circuit boards.

[Prior Art] When drilling a hole in a printed circuit board, etc., it is necessary that the punch, stripper, and die are accurately arranged in a straight line.
In the punching device disclosed in Japanese Patent No. 094, a member (an upper plate) for attaching a punch and a member for attaching a stripper are provided separately and independently.

[Problem to be Solved] When the punch and the stripper are separated and provided in separate members as in the above-mentioned conventional technology, there is a problem that the adjustment to arrange the punch and the stripper in a straight line is troublesome. there were. In addition, in the same publication, in order to transmit the pressing force from the member to which the punch is attached (upper plate) to the member to which the stripper is attached, a pressing force transmission part is provided in the middle part, but when replacing the punch, In this case, the punch had to be removed from the hole in the stripper after the transmission part was separated, which made replacing the punch cumbersome.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a punching device that does not require position adjustment between the punch and the stripper and allows easy replacement of the punch.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a punching device that performs perforation using a die fixed to a lower plate and a punch fixed to an upper plate, in which the punch is held. A bunch holder, a holder holder fixedly provided on the upper plate to receive the punch holder, a holder holder that is detachable from the holder holder with the punch holder in between to secure the punch holder to the holder holder, and a punch. - A guide that slidably fits on the outer circumference of the lower end of the holder and has a groove formed on the outer circumferential surface, a stripper that is fixed to the lower surface of the guide, and a pair of locking parts that fit into the groove from both sides. a stripper arm having a bifurcated portion and supported so as to be swingable relative to the upper plate; and an urging means for applying rotational force to the stripper arm so as to spring the stripper toward the die. Equipped with:

[Example 1] Hereinafter, an example of the present invention will be described in detail based on the drawings.

In Figure 1, the work table 1 is a base (not shown).
The lower plate 2 is located below it with a predetermined gap. A through hole 2a is bored in the front part of the lower plate 2, and a die holding vibrator 4 connected to the lower end of the die 3 is fitted into the through hole 2a. It is attached to the lower plate 2 by a connected die holder 5. The position of the die holder 5 can be adjusted forward, backward, left and right using four position adjustment screws 6 attached to the lower plate 2.

The rear end of the die holding vibrator 4 is connected to a flexible tube (not shown), and can suck out punch waste using air.

The upper plate 8 has a cylinder shaft 9 connected to its end, and when the cylinder (not shown) is driven,
The upper plate 8 moves up and down. As shown in Figure 1.2, a notch 8a is formed in the center lower part of the upper plate 8, and the nib plate 8 is opened toward the notch 8a.
A second cap screw 21 is screwed through the.

A holder receiver 10 that bends and extends forward is fixed to the cutout 8a, and the holder receiver 10 is provided with a semicircular cutout 10a as shown in the third figure.

A holder presser 11 is connected to the holder receiver 10. The holder presser 11 is provided with a semicircular notch 11a that is continuous with the notch 10a, and the punch holder 12 is fitted into both the notches 10a and 11a. The holder presser 11 is provided with a knob flb. As shown in the third figure, the holder presser 11 is detachably connected to the holder receiver 10 by a bolt 22.

The punch holder 12 is provided with a holding hole 12a for holding the punch 13 in the axial direction, and a first holding screw 2 for holding the punch 13 so that it cannot escape is provided in the upper part of the holding hole 12a.
0 is screwed. The second cap screw 21 described above is located above the first cap screw 20. The punch holder 12 has a cylindrical outer shape, and has a collar 12 at the top.
b is provided, and when it is fitted into the notches 10a and lla as described above, it is held by this collar portion 12b so that it cannot fall off.

A guide 14 is slidably fitted to the lower end of the punch holder 12, and a wear-resistant metal 14a is fixed to the inner peripheral surface of the guide 14, and a circumferential groove is formed on the outer peripheral surface of the guide 14. 14
b is a provision. A stripper 15 is fixed to the lower surface of the guide 14. The center portion of the stripper 15 protrudes downward, and has an insertion hole 15a through which the tip of the bunch 13 is inserted. The upper surface of the stripper 15 is provided with a perforation portion 15b that is fixed to the bunch holder 12.

The guide 14 and the stripper 15 are connected to the stripper arm 1
6, it is detachably supported. Stripper arm 1
6 is bent forward as shown in the second figure,
As shown in FIG. 4, a bifurcated portion 16b is formed at the front end, and screw holes 16c are provided at the leading end of the bifurcated portion. Then, as shown in the first figure, the bolt 17 is screwed into the screw hole 16c, and the protruding portion is inserted into the groove 14 of the guide 14.
It is inserted into b. Therefore, bolt 17 is
It becomes a locking part for 4. A support shaft 26 passes through a hole 16a formed in the center of the stripper arm 16. The shaft 26 is pivotally supported by an arm support portion 10b that is vertically disposed on the holder receiver 10, so that the stripper arm 16 can swing freely relative to the upper plate 8. As shown in the second figure, an adjusting screw 18 is screwed into the rear end of the stripper arm 16, and by bringing the tip end surface into contact with the holder receiver 10, the tip end surface of the bunch 13 is aligned with the insertion hole of the stripper 15. 15a. Further, a biasing spring 19 is in contact with the rear end surface, and applies a rotational force to the stripper arm 16 so as to spring the stripper 16 downward (toward the die 5 side). This biasing spring 19 is connected to a support plate 23 fixed to the upper plate 8.
It is attached to the bolt 24 that passes through.

The workpiece 25 is transported on the upper surface of the work table 1 by a transport means (not shown).

This embodiment is configured as described above, and the workpiece 25
After transporting the upper plate 8 to a predetermined position, the cylinder is driven to lower the upper plate 8. Then, the stripper 15 comes into contact with the workpiece 25, and since the stripper 15 cannot descend any further, the stripper arm 16 swings while compressing the biasing spring 19, and the punch holder 12 slides inside the guide 14 and descends. do. At this time, holes are made in the workpiece 25 by the bunch 13. When the tip surface of the punch holder 12 comes into contact with the perforation part 15b of the stripper 15 and drilling is completed, the cylinder shaft 9 moves back, the bunch 13 rises, and the tip of the bunch 13 comes out of the workpiece 25. When the screw 18 enters the insertion hole 15a of the stripper, the tip of the adjustment screw 18 comes into contact with the holder receiver 10, and the guide 14 and the stripper 15 rise together with the bunch 13. At this time, even if the cylinder shaft 9 begins to retreat, the compressed biasing spring 19
The stripper arm 16 does not swing while it returns.

Therefore, the bunch 13 rises through the insertion hole 15a while the stripper 15 remains in contact with the workpiece 25, and then the stripper arm 16 swings and the guide 14 and the stripper arm 15 also rise.

When replacing the bunch 13, remove the second presser screw 21, remove the bolt 22, and pull out the holder presser 11 by holding the knob 11b. Then, the punch holder 12 is removed together with the guide 14 and the strip and buckle 15. bolt 17
is only inserted into the circumferential groove 14c,
It is possible to pull it out. After taking out the punch holder 12, remove the first cap screw 20, replace the bunch 13, screw the first cap screw 20 again, and install a new bunch 1.
3 is held in the punch holder 12. Guide 1
4 and the stripper 15 are fitted into the punch holder 12, the tip of the bunch 13 is automatically positioned so as to be inserted into the insertion hole 15a of the stripper 15. Therefore, while engaging the bolt 17 in the circumferential groove 14b, the collar portion 12b of the punch holder 12 is placed on the holder receiver 10, and the holder presser 11 is fixed to the holder receiver 10 by screwing the bolt 22. Then, the first cap screw 2 is further tightened by the second cap screw 21.
Press 0. This completes the bunch exchange.

[Effect] In the punching device of the present invention, the guide is slidably provided on the outer periphery of the punch holder, and the stripper is fixed to the lower surface of this guide, so that the relative relationship between the bunch and the stripper is automatically determined. This eliminates the need for conventional adjustment work.

Furthermore, the punch holder can be removed and the punch replaced simply by removing the holder holder, so the punch replacement work is extremely easy.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional view of a main part, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, FIG. 3 is a cross-sectional view taken along line B-B in FIG. FIG. 4 is a plan view of the stripper arm. 2...Lower plate, 3...Dice, 8...Upper plate, 10...Holder holder, 11...Holder presser, 12#...Punch holder, 13...Punch, 14...Guide, 14b...Groove , 15・◆・Stripper, 16・・Stripper arm, 16b・・Bifurcated portion 17・・Bolt, 19・・Biasing spring. that's all

Claims (1)

[Claims] A punching device that performs perforation using a die fixed to a lower plate and a punch fixed to an upper plate, comprising: a punch holder for holding a punch; and an upper plate for receiving the punch holder. a holder holder fixedly provided on the holder; a holder holder that is removable from the holder holding the punch holder in between, for fixing the punch holder to the holder holder; and an outer periphery of the lower end of the punch holder. A guide that is slidably fitted into the guide and has a groove formed on its outer peripheral surface, a stripper fixed to the lower surface of the guide, and a pair of locking parts that fit into the groove from both sides are provided. a stripper arm, which is provided with a bifurcated portion and is supported so as to be swingable relative to the upper plate; A punching device characterized by comprising: a force means;