JP2512685B2 - Perforator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching device for a flexible printed circuit board, and more particularly, it is useful for punching a trim hole and punching a reference hole which is a pre-work before punching a printed circuit board formed on a base print. Perforation device

[0002]

2. Description of the Related Art Base print W1 such as flexible film
When the printed board W2 formed above is punched out, high precision is required for punching the U-shaped portions along the trim outline W3 at both end portions, so-called trim holes W4. That is, a large number of wiring pattern connection leads are formed at both ends of the printed circuit board W2 surrounded by the trim hole W4.
When the entire printed circuit board W2 including the punching of the trim hole W4 is punched by the conventional press machine, the punching precision around the connecting lead portion becomes low, and the poor connection between the lead portion and the external lead easily occurs. The problem arises that the reliability of the product is reduced (see FIG. 2). It is possible to use a more precise press die in order to solve the above-mentioned problems, but in this case, not only is there a waste in punching a portion around the trim hole W4 that does not require high precision, but the die becomes expensive. Therefore, a new problem arises that the production cost rises.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to punch out around a trim hole of a printed circuit board formed on a base print with high accuracy. It is to provide a novel punching device that can be used.

[0004]

In order to achieve the above object, the punching device of the present invention is, in claim 1, a punching machine equipped with at least two punch shafts that are supported so as to be capable of striking a die, A work holding mechanism for holding a work to be an object to be punched on a reference plane set between the punch shaft and the die, a feeding mechanism for moving the punching machine in the X-axis direction, and a work holding mechanism for the X-axis direction. Orthogonal Y
The above two pans are equipped with a feed mechanism that moves them in the axial direction.
The chi-axis has a punch having a substantially rectangular shape in plan view at the lower end, and
One of the punch axes has a longitudinal direction X in a plan view of the rectangular punch.
Support so that it is parallel to the axial direction, and the other punch axis
Is the longitudinal direction of the rectangular punch in plan view with respect to the Y-axis direction.
The feature is that they are supported parallel to each other. Bill again
In paragraph 2, the two punch shafts are supported so as to be rotatable in the circumferential direction.
Hold the rectangular punch at the bottom of each punch shaft
The fact that the angle can be adjusted with respect to the axial direction or the Y-axis direction
Characterize.

[0005]

[ Operation ] According to the above configuration , the base plate which is the work
Printed circuit board formed on the base print
The center side of the trim outline that has a U-shape in plan view at the end
Part and left and right side parts are parallel to the X-axis or Y-axis, respectively.
It is held by the feed mechanism in each state.
The punching machine in the X-axis direction and the work holding mechanism in the Y direction.
Move a predetermined amount in the axial direction to make a rectangular shape at the lower end of the punch shaft.
Position the punch directly above the center side or the left and right sides.
And then punching the two punch axes.
By sequentially performing the above, it becomes possible to punch out the trim holes having a U-shape in plan view at both end portions of the printed board with extremely high accuracy. Moreover, it is configured as described in claim 2.
In this case, rotate the punch shaft in the circumferential direction by a predetermined amount to form a rectangle.
The angle of the rectangular punch with respect to the X-axis direction or the Y-axis direction
By setting the trim outline of both ends of the printed circuit board
Can be used for trim holes of different shapes other than U-shaped in plan view .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a punching device according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the punching apparatus A of this embodiment includes a punching machine a having three types of punches 2a, 2b, 2c, a work holding mechanism b for holding a work W, and a punching machine a. X-axis direction (direction of arrow X shown in the figure , in other words, right and left of punching machine a)
The feed mechanism c for moving the workpiece holding mechanism b
Y-axis direction orthogonal to the axial direction (direction of arrow Y in the figure ,
In other words, the feed mechanism d for moving the punching machine a in the front-back direction ) is provided on the work surface f.

As shown in FIG. 2, the work W is formed by forming a wiring pattern at a predetermined position on the upper surface of a base print W1 made of a flexible film having an insulating property to produce a plurality of printed circuit boards W2. Holding frame 23 of the holding mechanism b
It is immovably fixed to the upper surface by using an appropriate attaching means such as tape. Each of the printed boards W2 is punched from the base print W1 by a punching process using a press device (not shown). Prior to the punching process, the trim hole W4 is punched by the apparatus A of this embodiment. The trim hole W4 is a portion surrounded by trim outlines at both ends of each printed circuit board W2, and is a plane formed by a combination of long holes parallel to the X-axis direction and long holes parallel to the Y-axis direction. It has a substantially U-shape.

The punching machine a is equipped with three punch units 2 in parallel on the tip side of the upper side 1a of the support arm 1 which is substantially U-shaped when viewed from the front, and punches 2a of each punch unit 2 on the tip side of the lower side 1b. To dies 2a to 3c are arranged, and the feed mechanism c arranged on the work surface f makes X
It is movably supported in the axial direction.

Each punch unit 2 is provided with an operating portion 4 for each unit, and a drive shaft 5 which can be loosely inserted into a mounting hole 1c formed in the upper side portion 1a is supported by the operating portion 4 so as to be movable up and down. below the drive shaft 5 in conjunction with the lowering movement of the drive shaft 5 Dado capable driven shaft (punch ram) 10
Each drive shaft 5 and the driven shaft 10 form a punch shaft.
In addition, at the bottom of each punch shaft,
2a to 2c are provided, and the compressed air supply means serving as the drive source of each operating part 4 is electrically connected to the control means described later to automatically control the punching movement of each punch 2a to 2c. .

The operating part 4 has upper and lower piston chambers 4a and 4b defined in a case 7 with bolts 6 secured to the upper surface of the upper side 1a, and these chambers 4a and 4b are used as compressed air supply means. Let me know. A return piston 4c is located in the upper piston chamber 4a, and a lowering piston is located in the lower piston chamber 4b.
A shaft that houses 4d respectively and connects both pistons 4c and 4d
The lower end of 4e is projected from the lower surface of the case 7 so that the drive shaft 5
Are integrally connected, and the upper end of the coaxial 4e is projected from the upper surface of the case 7 and a knob 4f for adjusting the lower limit position is attached. Picking 4f
Screwed mounted on threaded portion which is engraved on the upper end outer periphery of the shaft 4e is with a shaft 4e to advance and retreat threadedly by the rotation operation of該Tsumami 4f, the lower limit position of the drive shaft 5, i.e., the lower limit of the punch 2a~2c The position will be adjusted.

The punch holder 8 fixed to the lower surface side of the upper side 1a is provided with through holes 8a which communicate with the above-mentioned mounting holes 1c, respectively, and driven through guide holes 9 inside the through holes 8a.
The punch ram 10, which is the axis, is loaded in a vertically movable manner. Each punch ram 10 is biased in the mounting hole 1c direction by a spring 11 locked to the stepped portion 8b so that the upper end of the punch ram 10 abuts on the lower end of the drive shaft 5 .
The lower end is integrally provided with punches 2a, 2b, 2c protruding from the through hole 8a. 12 of rotation i.e. the punch axis of the underwear arm 10 times
Motion to regulate the punch 2a in parallel with the Y-axis direction.
Pins for fixing the chisels 2b in parallel to the X-axis direction , 13 for a collar that regulates the upper limit position of the punches 2a-2c, and 14 for punches 2a
It is a rubber cover that protects 2c.

The punches 2a to 2c have different plane (bottom) shapes as shown in FIGS. 3 and 4, and the first punch 2a closest to the tip of the upper side portion 1a has a rectangular cross section. Ah
And the longitudinal direction of the rectangular first punch 2a in plan view is Y
It is supported so as to be parallel to the axial direction . The second punch 2b located inside the first punch 2a has a rectangular cross section in plan view, and the second punch 2b having the rectangular shape has a long side in plan view.
It is supported so that the direction is parallel to the X-axis direction .
The third punch 2c, which is located inside the second punch 2b, is an axial punch having a substantially perfect circular cross section.

The dies 3a, 3b, 3c provided in opposition to the punches 2a, 2b, 2c are provided with die holes 3a'-3c 'into which the respective punches can be loosely fitted, and the supporting arm 1 is variable. It is embedded in the die holder 15 attached to the portion 1b. Die holder 1
5, a passage 16 communicating with the die holes 3a'-3c 'is formed in the lower side portion 1b.

Air passages 17a and 17b are provided in the center of each punch shaft 5 and each of the punches 2a to 2c, and an air jet port 17c is provided at the tip of each punch 2a to 2c. A part of the air supplied to the piston chamber 4b is ejected from the ejection port 17c through the air passages 17a and 17b so that the punched dust during punching can be dropped into the passage 16.

The work holding mechanism b includes two rails 20 and 21.
Are installed side by side on the work surface f so as to be parallel to the Y-axis direction, and two front and rear clamps 22 are attached to the rails 20 and 21, respectively.
a, 22a, 22b, 22b are slidably mounted in the rail longitudinal direction, and the holding frame 23 is attached by the four clamps on the reference plane set between the punches 2a to 2c and the dies 3a to 3c. It is configured to be supported horizontally. The holding frame 23 is, for example, a rectangular frame body in plan view made of a desired metal material such as stainless steel,
The work W is immovably fixed to the upper surface of the work W using an appropriate attaching means such as a tape.

The holding frame 23 is supported by the feeding mechanism d so as to be movable in the Y-axis direction. The feed mechanism d slidably mounts the above-mentioned clamps 22a, 22a, 22b, 22b on the rails 20, 21, and slides together with each clamp, for example, a well-known transmission such as a worm wheel or an endless chain. The feed means (not shown) and the forward / reverse rotation motors 24, 25 installed on one end side of the rails 20, 21 are linked together. The motors 24 and 25 are electrically connected to a control means which will be described later, and their drives are controlled so that the holding frame 23 is moved in the Y-axis direction by a predetermined amount according to a command from the control means.

The feed mechanism c that supports the punching machine a has two rails 30 and 31 between the ends of the rails 20 and 21 which are parallel to the X-axis direction.
The rail receivers 1d and 1d, which are arranged side by side and project toward the base end side of the lower side portion 1b of the support arm 1, are mounted on the rails 30 and 31 to support the support arm 1 slidably in the X-axis direction. With
The forward / reverse rotation motor 32 installed between the rails 30 and 31 is linked to a known transmission feed means (not shown) such as a worm wheel. The motor 32 is electrically connected to a control means described later, and its drive is controlled by a command from the control means so that the support arm 1 is moved in the X-axis direction by a predetermined amount.

Although the control means for controlling the striking and returning movements of the punches 2a, 2b and 2c and the operation of the respective feeding mechanisms c and d will not be described in detail, the CCD camera 40 and the CCD camera 40 at the tip of the upper side 1a of the support arm 1 will be described. The lens 41 is attached to the tip of the lower side 1b of the arm 1
A transmissive light (LED) 42 is installed in each case relative to 41,
The punching position of each trim hole W4 is calculated by calculating a distance from the reference point to each of the punches 2a, 2b, 2c by using an arbitrary point on the work W transmitted and imaged by the light 42 as a reference point. The configuration is well known in the technical field of this type.

Thus, according to the punching device A of this embodiment,
The base print W1 which is the work is connected to each printed circuit board W.
2 For the trim outline W3 which is U-shaped in plan view at both ends,
The central side portion W3-1 and the left and right side portions W3-2 are respectively in the X-axis direction or
After holding on the holding frame 23 so as to be parallel to the Y-axis direction, the punching machine a is moved in the X-axis direction by operating the motors 24, 25 and 32 of the respective feeding mechanisms c and d based on the above calculated data. , The work W is fed in the Y-axis direction by a predetermined amount, and along any portion of the printed circuit board W2 in the work W, for example, the trim outline W3 of the lower leftmost printed circuit board W2 in FIG. Position the first punch 2a,
Moreover, the actuating portion 3 associated with the punch 2a is actuated to sequentially punch the vertically elongated slots N1 to N4. At the same time, a third hole is formed directly above the opening of the reference hole N5 used in the later pressing process.
The reference hole N5 is punched out by positioning the punch 2c and operating the operating portion 3 linked to the punch 2c. After that, the second punch 2b is positioned along the portion of the trim outline W3 parallel to the X axis, and the actuating portion 3 linked to the punch 2b is actuated to produce oblong holes N6 to N10.
By successively punching through, the trim holes W3 are punched at the both ends of the printed circuit board W2 with extremely high precision, and at the same time the reference holes N5 are opened.

The above operation is repeated for each printed circuit board W2, and when the trim holes W3 are punched out at both ends of all the printed circuit boards W2 and the reference holes N5 are opened, the pre-work by the apparatus A is finished and held. The work W removed from the mechanism b is sent to the press punching step which is the next step, and each printed board W2 is punched in this step.

In the present embodiment, the punches equipped on the punching machine a are the above-mentioned first punch 2a, second punch 2b and third punch 2c, but the present invention is not limited to this, and at least the first punch 2a. It suffices that the punch 2a and the second punch 2b be provided, and it is also possible to provide another different-shaped punch in addition to the third punch 2c.

Further, in this embodiment, the punch 2a is fixed by the pin 12
Punch 2b parallel to the Y-axis direction with respect to the X-axis direction
Although it was configured to fix each in parallel, a well-known support mechanism
The punch ram 10 is rotatably supported via the
Pair the first punch 2a and the second punch 2b in the X-axis direction or the Y-axis direction.
The angle may be adjusted so that the punch
Rotate the shaft in the circumferential direction by a predetermined amount to form rectangular punches 2a, 2b.
Appropriately set to an angle with respect to the X-axis direction or Y-axis Direction of
By doing so, the trim outline W3 on both ends of the printed circuit board W2
Can accommodate trim holes of different shapes other than U-shaped in plan view
Become.

[0023]

Since the punching apparatus according to the present invention is constructed as described above, the punching machine is moved in the X-axis direction and the work holding mechanism is moved in the Y-axis direction by a predetermined amount by the respective feed mechanisms, and at the same time, each of the rectangles is moved. By sequentially driving the shape punches, it is possible to punch the trim holes, which are U-shaped in plan view, located at both ends of the printed board with extremely high accuracy.

Therefore, when the entire printed circuit board is punched by a pressing device, connection failure with external leads occurs, and when a more precise press die is used, the punching precision of parts other than the periphery of the trim hole is wasted. By eliminating all the conventional defects such as the rise in manufacturing costs, the highly accurate trim holes are punched out in order to increase the number of connection leads and the pitches to be reduced due to the high density of wiring patterns in recent years, thereby improving reliability. High product (printed circuit board)
It is possible to provide.

Further, each rectangular punch is moved in the X-axis direction.
Alternatively , by supporting the Y-axis direction so that the angle can be adjusted,
Many effects are achieved, such as being able to accommodate trim holes of different shapes other than the U-shape in plan view.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a punching device according to the present invention.

FIG. 2 is a plan view of the device shown in FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of the device shown in FIG.

FIG. 4 is a simplified diagram showing a planar shape of each punch.

[Explanation of symbols]

A: Punching device a: Punching machine b: Work holding mechanism c: Feeding mechanism d: Feeding mechanism 1: Support arm
2a: 1st punch 2b: 2nd punch 2c: 3rd punch 3a, 3b, 3c: Die W: Work W2: Printed circuit board W4: Trim hole

Claims (2)

(57) [Claims] 1. A punch Dado rotatably supported thereby relative to the die
Punching machine equipped with at least two axes , above
A work holding mechanism for holding a work to be punched on a reference plane set between the punch shaft and the die, a feeding mechanism for moving the punching machine in the X axis direction, and a work holding mechanism orthogonal to the X axis direction. and a feed mechanism for moving the Y-axis direction, viewed Ryakunori the punch axis of the two lower ends
Shape punch, and one punch shaft has the rectangular shape
The longitudinal direction of the punch in plan view becomes parallel to the X-axis direction.
And the other punch axis is the plane of the rectangular punch.
Support so that the longitudinal direction is parallel to the Y-axis direction
Made punching device. 2. The two punch shafts can be rotated in the circumferential direction.
The rectangular punches at the bottom of each punch shaft,
The punching device according to claim 1 , wherein the angle can be adjusted with respect to the X-axis direction or the Y-axis direction .