JPH10180692A - Boring device for soft sheet such as ceramic green sheet, flexible substrate or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To straighten slackening of a soft sheet between a feeding mechanism and a winding mechanism so as to accurately bore a desired position by providing a tension mechanism with sensor means for stopping a fine-movement in an X axis direction when the specified tension of the soft sheet is detected. SOLUTION: For fixing a soft sheet X and straightening its slackening each time the boring part of the soft sheet CX such as a ceramic green sheet or a flexible substrate while being fed by a feeding mechanism 3 and wound by a winding mechanism 4 is fed by a fixed amount so as to face a boring tool unit 1, the sheet X is fine-moved in an X axis direction by a tension mechanism 5. The fine-movement is carried out until specified tension is detected by a sensor means provided in the tension mechanism, the fine-movement in the X axis direction is stopped when the specified tension is detected and then slackening of the soft sheet X is straightened. Thus, accurate boring is performed at a desired position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching apparatus for punching a soft sheet such as a ceramic green sheet or a flexible substrate, and more particularly to a punching apparatus for punching out a rolled soft sheet while punching it in a desired punching pattern. It is about.

[0002]

2. Description of the Related Art Conventionally, as a punching apparatus for punching while feeding a soft sheet such as a ceramic green sheet or a flexible substrate wound in a roll shape, for example, Japanese Patent Publication No. 7-4
No. 7279 (the former) and Japanese Patent Publication No. 7-47280 (the latter) are known. Both the former and the latter are basically a winding mechanism (winding roll) provided on the other side while feeding a roll-shaped soft sheet provided on one side of the machine base in the X-axis direction by a feeding mechanism (feeding roll). This is a structure in which a punching unit is used to pierce a target portion of the soft sheet to be pierced between the feeding mechanism and the winding mechanism while winding. The advantage of these perforators is that the perforation is performed while unwinding the soft sheet wound in a roll shape, so the pre-cutting of the soft sheet into a plate shape in advance and the clamping of it with a work holder is unnecessary, greatly improving productivity. Can be improved.

[0003]

By the way, although the feeding mechanism (feeding roll) and the winding mechanism (winding roll) are driven in synchronization with each other, there is a slight loosening and the feeding mechanism (feeding roll). ), The soft sheet between the take-up mechanism (take-up roll) and the soft sheet between the pay-out mechanism (take-up roll) and the take-up mechanism (take-up roll) are loosened. For this reason, in the prior art, a flat-plate-shaped vacuum body having a hollow inside is formed by scattered suction holes on the lower surface on both sides of the piercing device unit, and the vacuum sheet sucks the soft sheet every time a fixed amount is fed. Tension is applied. However, as a result of the suction method in which the soft sheet portions on both sides are slightly lifted directly above the punching device unit, it is impossible to accurately cope with a difference in the amount of slack based on a difference in material, and the punching accuracy is reduced. In order to correct this, it is necessary to previously measure the amount of slack for each material of the soft sheet with respect to the separation distance between the feeding mechanism and the winding mechanism, and to arrange the vacuum body at a height position corresponding to the measured amount. Need and
Correspondence is troublesome, too.

The present invention has been made in view of such a conventional situation, and an object thereof is to correct a slack of a soft sheet between a feeding mechanism and a winding mechanism so that the soft sheet can be accurately positioned at a desired position. It is an object of the present invention to provide a perforation device for a soft sheet such as a ceramic green sheet or a flexible substrate that is perforated.

[0005]

The technical means taken to achieve the above object is as follows. Claim 1 is a mechanism for feeding out a soft sheet such as a ceramic green sheet or a flexible substrate in the X-axis direction, and a roll-out mechanism. A winding mechanism for winding in a shape, a feeding mechanism for the winding mechanism, a piercing device unit disposed between the winding mechanism, and a punching unit for punching a soft sheet by controlling and moving in a Y-axis direction and an X-axis direction, and the feeding mechanism; A tension mechanism that fixes the soft sheet between the take-up mechanisms and finely moves in the X-axis direction while finely moving in the X-axis direction. The tension mechanism stops fine movement in the X-axis direction when a predetermined tension of the soft sheet is detected. The gist of the present invention is to provide sensor means for performing the above. According to a second aspect of the present invention, the tension mechanism according to the first aspect includes a pair of approachable / separable clamp arms which sandwich the soft sheet from above and below at right angles to the X-axis direction, and a support portion of the clamp arm. A tension moving mechanism for finely moving in the X-axis direction, a correction moving mechanism for moving the supporting section in the Y-axis direction by interposing the supporting section and the tension moving mechanism therebetween, and a soft sheet provided in the clamp arm A holding force variable mechanism for creating a semi-fixed state in which the soft sheet is half-clamped with a clamping state weaker than the clamping state, and edge detection means for detecting the edge of the flexible sheet on the machine base. The feeding mechanism and the winding mechanism are configured to be controllably movable in the Y-axis direction, and the clamping force variable mechanism is accommodated in the clamp arm so as to be freely rotatable in the circumferential direction. The protrusion is biased by a spring so as to protrude in the direction of the soft sheet, and the feeding mechanism and the winding mechanism are controlled and moved in the Y-axis direction in the semi-fixed state based on the output signal of the edge detecting means. Is the gist. According to a third aspect of the present invention, the feeding mechanism and the winding mechanism are controlled and moved in the Y-axis direction in the semi-fixed state based on the output signal of the edge detecting means. The gist is that the correction movement moving mechanism, the feeding mechanism, and the winding mechanism are controlled and moved in the Y axis direction in the fixed state.
The predetermined tension detected by the above-mentioned sensor means differs for each material of the soft sheet, and is stored in the control unit in advance as a stored value.

According to the above technical means, the following effects are obtained. (Claim 1) A fixed amount is fed so that a portion to be pierced of a soft sheet is opposed to a piercing unit while being wound by a winding mechanism and wound up by a winding mechanism. Each time, the soft sheet is finely moved in the X-axis direction by a tension mechanism so as to correct the slack by fixing the soft sheet. The fine movement is performed until the sensor means provided in the tension mechanism detects a predetermined tension,
Corrects looseness of soft sheets such as ceramic green sheets and flexible substrates. (Claim 2) The fixing (clamping) of the soft sheet with the clamp arm between the feeding mechanism and the winding mechanism can produce a fixed state in which the sheet is completely clamped and a semi-fixed state in which the sheet is clamped with a smaller force. it can. In the semi-fixed state, the soft sheet retreats the protruding member that is freely rotatable in the circumferential direction against the urging force of the spring, and the repulsive force of the spring gives the semi-fixed force of the soft sheet. This semi-fixing force gently presses the soft sheet, and controls the feeding mechanism and the winding mechanism in the Y-axis direction based on the output signal of the edge detecting means (specifically, for example, the feeding mechanism,
Θ when one of the winding mechanisms is controlled to move in the plus Y axis direction and the other is controlled to move in the minus Y axis direction).
It becomes a fulcrum of rotation of the soft sheet in the direction. Therefore, when the soft sheet is displaced in the θ direction in plan view due to friction with a punch or the like at the time of perforation, it can be corrected without causing wrinkles in the soft sheet. (Claim 3) Even if the soft sheet may move in parallel in the Y-axis direction due to friction with a piercing tool at the time of punching, correction is made based on the output signal of the edge detecting means while the soft sheet is held in a fixed state. The moving movement mechanism, the feeding mechanism, and the winding mechanism are simultaneously and simultaneously moved in the Y-axis direction in the plus or minus direction to correct any displacement in the Y-axis direction when viewed in plan.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 7 illustrate an embodiment of a punching apparatus for a soft sheet such as a ceramic green sheet and a flexible substrate with reference to the drawings. Reference numeral A denotes a punching device, 1 denotes a punching unit, 2 denotes an edge detecting means, 3 denotes a feeding mechanism, 4 denotes a winding mechanism, and 5 denotes a tension mechanism.

In the present embodiment, the punch unit 1 is of a type in which a required number of punch units 11 are arranged in the X-axis direction, and as shown in FIGS. 1 and 2, a horizontal reference surface (mounting surface).
An X-axis moving mechanism 41 and a Y-axis moving mechanism 51 are provided on a reference surface (mounting surface) 11 of a machine base 31 having a step part having an intermediate surface at the upper surface 21.
Are provided so as to be controllably movable in the X-axis direction and the Y-axis direction via the.

Although not shown in the drawings, the punch unit 11 has a U-shape in a side view, and a central space is a transfer space 11a for a work (soft sheet) X.
A punch 11b is provided in an upper arm portion facing directly opposite to a, and a die (not shown) is buried in an upper portion of the lower arm portion facing the punch 11b so as to be flush with the upper surface. Of course, punches and dice are interchangeable. Each of the punch units 11 is provided with a punch 11b having a different shape, so that holes having different shapes can be formed. The punch unit 1 is a centering camera unit provided with a CCD camera in one of the punch units.
61 is equipped. The punch unit 1 is not limited to a punch, but may be a drill or a punch type.

The X-axis moving mechanism 41 moves the piercing tool unit 1 in the X-axis direction, and a base 41a for supporting the piercing tool unit 1 and the reference surface (mounting surface) 21 have an X-axis moving mechanism.
Guide rods 41b, 41b arranged in parallel along the axial direction and penetrating the table 41a; screw rods 41c provided between the guide rods 41b, 41b in the X-axis direction and penetrating the table 41a; Each of which is provided with a pulley that is screwed into the screw rod 41c;
A sprocket (not shown), a pulley similarly provided on the base 41a, a drive source (for example, a servomotor) (not shown) connected to the sprocket, and the like. The drive of the drive source causes the pulley and sprocket to rotate. With its pulley,
By rotating the sprocket about the screw rod 41c, the base 41a supporting the piercing tool unit 1 is moved in the X-axis direction.

The Y-axis moving mechanism 51 moves the piercing tool unit 1 in the Y-axis direction.
A screw rod 51a provided along the Y-axis direction on the upper surface of
A driving source (for example, a servo motor) 51b for driving the screw rod 51a and a screw rod
A vertical portion (not shown) that is screwed to 51a, and Y
The drill unit 1 is moved in the X-axis direction above the table 41a by the driving of the drive source 51b.

The feeding mechanism 3 rotatably mounts a winding shaft 13 of a soft sheet (work) X such as a ceramic green sheet or a flexible substrate wound in a roll shape.
A feed roller 23 is provided downstream of the winding shaft 13.

The winding mechanism 4 functions symmetrically with the unwinding mechanism 3, and has a feed roller 14 on the upstream side.
Further, a winding shaft 24 of the soft sheet X is provided on the downstream side.

The feeding mechanism 3 and the winding mechanism 4 are each driven by a motor, and are supported by support bases 33 and 34 which can be individually controlled and moved in the Y-axis direction as shown in the figure.

The mechanism for controlling and moving each of the supports 33 and 34 in the Y-axis direction has the same structure as the Y-axis moving mechanism 51 described above.

Reference numeral 6 denotes a pinch roller, which is supported by a drive source (for example, a cylinder) for vertical movement and has a function of measuring a winding amount (feed amount) of the soft sheet X. Reference numeral 2 denotes an edge detecting means, which is a linear sensor or the like installed at an upper position with the punch unit 1 interposed therebetween, and detects an edge (long side) of the soft sheet X.

As shown in FIG. 3, the tension mechanism 5 includes a pair of upper and lower clamp arms 15, 15 disposed upstream of the piercing device unit 1, an actuator 25 for moving the clamp arms 15, 15 toward and away from each other, A pair of clamp arms
A tension moving mechanism 45 for finely moving the support portions 35 of the 15 and 15 in the X-axis direction, a correcting motion moving mechanism 55 provided between the tension moving mechanism 45 and the support portion 35, and a soft sheet X. A clamping force variable mechanism 65 for half-clamping the soft sheet X with a clamping force weaker than the clamping state,
A sensor means 75 for stopping fine movement in the X-axis direction when a predetermined tension of the soft sheet X is detected.

The clamp arms 15, 15 are formed of a pair of upper and lower horizontal strips which are perpendicular to the X-axis direction and can be approached and separated from each other. As shown in FIG. Have been. The supporting part 35 is a parallel piece 35a.
A Z-axis actuator (linear motor, servomotor, etc.) 25, 25 is provided at the upper end of the, and a guide space 35c for making the upper clamp arm 15 contact the lower clamp arm 15 is recessed thereunder, The drive shaft 25a of the actuator 25 is connected to the upper clamp arm 15.

The Z-axis actuator 25 is controlled so as to make a fixed state where the opposing faces of the clamp arms 15 and 15 are indirectly contacted with the soft sheet X therebetween and a semi-fixed state which will be described later.

As shown in FIG. 3, the correction movement moving mechanism 55 includes a fixing base 55a, and a nut portion vertically suspended from a bottom piece 35d of the support portion 35.
35e, a screw bar 55b provided on the fixed base 55a along the Y-axis direction and screwed into the nut portion 35e, and a drive source (for example, a servomotor) 55c for rotating the screw bar 55b.

The fixed base 55a is a vertical body 55d having a hollow inside.
Are suspended along the Y-axis direction, and a support portion 35 is provided on the upper surface.
The guide rail 55e projects in the Y-axis direction, and the guide rail 55e supports the support portion 35 so as to be movable in the Y-axis direction.

A drive source for the Y-axis direction control movement of the moving mechanism 55 for correcting movement, the feeding mechanism 3 and the feeding mechanism 4 is linked to the edge detecting means 2 described above.

As shown in FIGS. 1 to 3, the tension moving mechanism 45 includes a drive source 45a housed in the vertical portion 55d and the X-axis moving mechanism 41 described above.

The driving source 45a is a screw rod as shown in FIG.
The driving force of an actuator such as a servomotor is transmitted to a pulley and a sprocket screwed into 41c. By driving the actuator, the pulley and the sprocket rotate around the screw rod 41c to guide the guide rod 41b.
The pair of upper and lower clamp arms 15, using 41b as a guide,
The support portion 35 provided with 15 is slightly moved in the X-axis direction to apply tension to the soft sheet X.

The sensor means 75 is provided in the guide space described above.
A strain gauge 75b is fixed to a flexure element 75a which is erected from the bottom of 35c and whose upper end is fixed to the lower clamp arm 15,
The strain gauge 75b is linked to the control unit Y.

The variable clamping force mechanism 65 is provided at the center of the upper and lower clamp arms 15, 15, as shown in FIGS. This clamping force variable mechanism 65 is provided for each clamp arm 1
The protrusions 65a, 65a protruding from the facing surfaces of 5, 15 can be rotated by guide means 65b such as a linear guide (can rotate freely in the circumferential direction).
And springs (compression springs) 65c, 65c interposed with the projections 65a, 65a, are urged in the projecting direction by the springs.
If you hold down against the reaction force of 65c, the spike 65a
65a, guide means 65b, and a structure in which it is immersed in a housing case 65d for housing a spring (compression spring) 65c, and a fixed state in which a soft sheet is held by the clamp arms 15, 15 (a holding state)
And a semi-fixed state (semi-clamped state).

The control unit Y includes a ROM for storing a predetermined control program for punching the soft sheet X, a RAM for storing data necessary for a punching pattern and the like required for arithmetic processing, and executes the control program based on the data. CPU, drive source of the feeding mechanism 3 and the winding mechanism 4, and its Y
Axial drive source, edge detecting means 2, moving mechanism 45 for tensioning clamp arm, moving mechanism 55 for correcting movement, variable clamping force mechanism 65, pinch roller 6, sensor means 75, X-axis moving mechanism 41 for piercing tool unit 4. , Y-axis moving mechanism 51 and the like.

In the soft sheet such as the ceramic green sheet and the flexible substrate having the above structure, first, the soft sheet X wound in a roll shape is fed out.
On the feed roller 23, between the clamp arms 15, 15, the transport space 11a of the punch unit 1, the pinch roller 6, and the receiving roller.
The free end of the winding mechanism 4 is wound around the winding shaft 24 through the feed roller 14 of the winding mechanism 4.

Next, when the apparatus itself is operated, the edge detecting means 2 detects both side portions (long edge portions) of the soft sheet X, raises the pinch roller 6 to separate it from the soft sheet X, and feeds out the mechanism 3 and the winding mechanism. By actuating the drive source for control movement in the Y-axis direction of the take-up mechanism 4, the feed-out mechanism 3 and the take-up mechanism 4 are individually controlled to move in the plus or minus direction in the Y-axis direction to reduce the positional deviation in the θ direction in plan view. Correct (FIG. 6B). Next, a pair of upper and lower clamp arms 1
The soft sheet X is pinched (fixed state) by 5 and 15, and the tension moving mechanism 45 is operated to apply tension to the soft sheet X. The fine movement of the soft sheet X is performed until the value obtained by electrically converting the amount of strain by the strain gauge 75b reaches a predetermined tension value stored in the control unit Y. The predetermined tension stored in the control unit Y differs depending on the material of the soft sheet X to be perforated, and is an optimal value that does not cause cutting by tension but also plastic deformation (FIG. 5A). b)). Then, the piercing tool unit 1 is controlled to move in the X and Y axis directions to pierce the target portion in a predetermined piercing pattern. Since the piercing tool unit 1 has the camera unit 61 at the time of piercing, the piercing is performed after the centering correction of the reference point is performed. This perforation is carried out by the feeding mechanism 3 and the winding mechanism 4 in a fixed amount.
This is performed every time a fixed amount of winding is performed. However, the soft sheet X slightly rotates in the θ direction in a plan view due to punching friction with a punch (punch) at the time of punching (FIG. 6A), or is parallel in a plan view. (FIG. 7A). At this time, since the edge detecting means 2 always detects both side portions (long edge portions) of the soft sheet X, the control unit Y determines that it is slightly rotated in the θ direction in plan view based on the output signal. Is determined, the clamp arms 15, 15 are semi-fixed and the pinch roller 6 is raised to separate it from the soft sheet X, and the driving source for the control movement in the Y-axis direction in the feeding mechanism 3 and the winding mechanism 4 is set. When it is operated, the feeding mechanism 3 and the winding mechanism 4 are individually controlled and moved in the plus or minus direction in the Y axis direction to correct the positional deviation in the θ direction in plan view (FIG. 6B). At the time of this correction, wrinkles and the like are not generated on the soft sheet X because the protrusion 65a is freely rotatable in the circumferential direction. On the other hand, when the control unit Y determines that it is slightly moving in parallel in a plan view based on the output signal, the pinch roller 6 is lifted while being pinched (fixed state) to separate from the soft sheet X and perform the correction operation. The driving source for the control movement in the Y-axis direction in the moving mechanism 55, the feeding mechanism 3, and the winding mechanism 4 is simultaneously moved to the plus side or the minus side in the Y-axis direction by the same amount to correct the parallel positional deviation in plan view. (FIG. 7B).

The fine rotation in the θ direction in the plan view and the parallel fine movement in the plan view are performed by fixedly feeding the soft sheet X after perforating and clamping the soft sheet X again by the clamp arms 15 and 15. And before drilling.

In this way, the soft sheet X is fed out,
A predetermined perforation is made in the rolled soft sheet X while being wound.

[0032]

As described above, the present invention has the following advantages. (Claim 1) When perforating a soft sheet such as a ceramic green sheet or a flexible substrate wound in a roll shape while feeding out the sheet, an optimum predetermined tension is applied to the soft sheet loosened or loosened by its own weight. Since the slack is corrected, it is possible to accurately pierce a desired position. (Claim 2) In addition, a tension mechanism for applying tension to the soft sheet includes a pair of upper and lower clamp arms, and a clamp accommodating a spring biased from the clamp arm toward the soft sheet so as to be freely rotatable in the circumferential direction. In the case of having a variable force mechanism, the protrusion serves as a fulcrum of rotation of the soft sheet in the θ direction in plan view. By controlling and moving the feeding mechanism and the winding mechanism in the Y-axis direction, the displacement of the soft sheet in the θ direction in plan view can be corrected. Therefore, the soft sheet portion between the feeding mechanism and the winding mechanism is affected by the perforation friction with the perforator, etc.
Even if the flexible sheet is rotated in the direction, the displacement can be corrected without causing a perforation error such as wrinkles in the soft sheet. (Claim 3) Further, since the tension mechanism for applying tension to the soft sheet is controlled to move in the Y-axis direction, the soft sheet is held by the pinching force variable mechanism based on the output signal of the edge detecting means. In the fixed state, the soft sheet portion between the feeding mechanism and the winding mechanism is controlled by moving the correcting movement moving mechanism, the feeding mechanism, and the winding mechanism in the Y-axis direction under the influence of the punching friction with the punch. When a parallel displacement occurs in plan view, it can be corrected, and the soft sheet can be correctly perforated at a desired perforation position as in the second aspect.

[Brief description of the drawings]

FIG. 1 is a front view of a punching device.

FIG. 2 is a plan view of the punching device.

FIG. 3 is a side sectional view of the tension mechanism.

FIG. 4 is an enlarged view of a main part of the tension mechanism, partially cut away, and FIG. 4 (a) shows a state before clamping. (B) shows a semi-fixed state. (C) shows a completely fixed state.

FIG. 5 schematically shows a front view in the middle of perforation, (a) showing a state before tension is applied, and (b) showing a state after tension is applied.

FIG. 6 is a plan view of a soft sheet, and (a) shows a state in which the soft sheet is inclined in the θ direction. (B) shows a state where it has been corrected.

FIG. 7 is a plan view of the soft sheet, and FIG. 7A shows a state in which the soft sheet slightly moves in the Y direction. (B) shows a state where it has been corrected.

[Explanation of symbols]

X: Soft sheet (work) 3: Unreeling mechanism 4: Rewind mechanism 1: Punch unit 5: Tension mechanism 2: Sensor means 15, 15: Clamp arm 45: Tension moving mechanism 35: Supporting part 55: Movement for correction movement Mechanism 65: Variable clamping force mechanism 2: Edge detection means 65a: Protrusion 65c: Spring 75: Sensor means 31: Machine base 6: Pinch roller

Claims (3)

[Claims] 1. A feeding mechanism for feeding a soft sheet such as a ceramic green sheet or a flexible substrate in the X-axis direction, a winding mechanism for winding the same in a roll shape, and a winding mechanism disposed between the feeding mechanism and the winding mechanism. A punch unit for punching the soft sheet by controlling the movement in the Y-axis direction and the X-axis direction; and a tension-releasable tension mechanism for fixing the soft sheet between the feeding mechanism and the winding mechanism and finely moving the sheet in the X-axis direction. A perforation device for a soft sheet such as a ceramic green sheet or a flexible substrate, comprising a sensor means for stopping fine movement in the X-axis direction when a predetermined tension of the soft sheet is detected. 2. The tension mechanism according to claim 1, wherein
A pair of clamp arms which can be approached and separated from each other in a direction perpendicular to the axial direction and which can be approached / separated, a tension moving mechanism for finely moving the support portion of the clamp arm in the X-axis direction, And a moving mechanism for correcting movement for controlling and moving the support portion in the Y-axis direction, and a fixed state provided on the clamp arm and holding the soft sheet halfway with the holding force weaker than the holding force. A variable clamping force mechanism for creating a semi-fixed state, and an edge detection means for detecting the edge of the soft sheet on the machine base.The unwinding mechanism and the winding mechanism are configured to be controllably movable in the Y-axis direction. The clamping force variable mechanism has a configuration in which the protrusion accommodated in the clamp arm so as to be freely rotatable in the circumferential direction is biased by a spring so as to protrude in the soft sheet direction, Tsu di mechanism feeding in the semi-fixed state based on the output signal of the detecting means, the winding mechanism ceramic green sheets, punching device of soft sheet such as a flexible substrate according to claim 1, wherein the controlled movement in the Y-axis direction. 3. The apparatus according to claim 2, wherein the feeding mechanism and the winding mechanism are controlled and moved in the Y-axis direction in the semi-fixed state based on an output signal of the edge detecting means. Moving mechanism for correction movement in fixed state,
The punching device for a soft sheet such as a ceramic green sheet or a flexible substrate according to claim 2, wherein the feeding mechanism and the winding mechanism are controlled and moved in the Y-axis direction.