JP3854953B2 - Repair material supply mechanism - Google Patents

Description

  The present invention relates to a breakage repair device for repairing a breakage of a conductor pattern on a printed circuit board, and more particularly to a repair material supply mechanism for repairing a breakage point.

  Conventionally, there is a disconnection repair device in which a ribbon-shaped repair material is applied to a disconnection portion of a conductor pattern on a printed circuit board, and the repair material is welded to the conductor pattern. Is disclosed.

  Here, the outline of the repairing operation of the disconnection repairing device will be described with reference to FIG. As shown in FIG. 7 (a), the printed wiring board 101 having a disconnection portion is placed on the work table 103 with the disconnection portion 102 to be repaired facing upward, and the ribbon material 104 is applied to the disconnection portion 102 so as to move up and down. First, the welding electrode 105 is brought into contact with the first welding position 104A for welding.

  For welding in this case, a parallel gap type welding electrode is widely used for welding by passing a current through a repair material 104 to a pair of electrodes provided with a slight gap 105A. After the welding at the first welding position is completed, the second welding position 104B is welded by raising the welding electrode 105 and moving the stage 103 in the horizontal direction.

  FIG. 7B shows a state in which the welding at two locations across the disconnection location 102 is completed in this way. Here, the further outer portions 104C and 104D of the two welding positions 104A and 104B of the repair material 104 at the two locations are unnecessary and are deleted.

Japanese Patent No. 2501131 (second page, FIG. 1)

  Here, it has been manually performed to hold the repair material 104 to the welding position 102 at the stage of FIG. However, in recent years, with the increase in the density of printed circuit boards, conductor patterns have become finer, and for example, it has become necessary to repair disconnection of conductor patterns having a width of 25 μm. In order to repair such a conductor pattern, it is necessary to use a repair material having the same width as that of the conductor pattern, which exceeds the limit of manually holding the repair material with high accuracy.

  Further, as shown in FIG. 7B, the operation of removing the excess portion from the outside 104C and 104D of the repair material 104 is also performed manually, and the repair material is bent several times at the positions 104C and 104D. It was common to break. In this case, it is necessary to be careful not to peel off the substrate surface that is heated during welding and the adhesive strength is lowered, and the conductor pattern. In addition to the above-mentioned thinning, the operator must perform extremely difficult work. It became.

In the present invention , a repairing material is released by separating a pair of pressing surfaces facing each other in order to send out a repairing material and a delivery hole and a predetermined length of the repairing material from the delivery hole.
While moving in the direction of retreating from the welded part, and then with the pair of holding surfaces
A feed mechanism that holds the repair material and moves in the direction of the welded portion, a cutting auxiliary member that moves in a direction parallel to the printed circuit surface and assists in cutting the repair material, and an angle with respect to the printed circuit surface and a cutting member for cutting the repair material moving in the direction, the cutting assistance part
Immediately before the material and cutting member move to cut the repair material,
A pair of holding surfaces release the repair material, and the feed hole is melted together with the feed mechanism.
It is retracted from the contact portion to provide a repair material supply mechanism according to claim Rukoto.

  As a result, stable maintenance of the repair material, accurate feed amount, and cutting of the repair material without applying external force to the welded portion can be realized.

  According to the present invention, since the repair material can be held, aligned, and cut without human hands, the operator can perform the disconnection repair work without paying attention to hand shaking or breathing. In addition, since the disconnection repair work is performed mechanically, accurate and reliable repair can be realized even if the conductor pattern to be repaired is fine.

  Furthermore, since the repair material is not cut manually after welding, no external force is applied to the welded part, the repair yield is improved, and the cutting member is repaired after the cutting auxiliary member reaches the cutting position. Since the material is cut, there is no fear that the cutting member damages the surface of the printed circuit board, and the yield is further improved.

  FIG. 1 is a side view of a repair material supply mechanism showing an embodiment of the present invention. In FIG. 1, 1 is a stage, 2 is a printed circuit board, 3 is a conductor pattern formed on the printed circuit board 2, 3A is a broken portion of the conductor pattern 3, 4 is a ribbon-shaped repair material, and 5 is a welding electrode. .

  Here, the stage 1 can be driven in a horizontal direction and a rotational direction on a horizontal plane, and a predetermined position of the printed circuit board 2 can be positioned immediately below the welding electrode 5. Further, the welding electrode 5 can be driven in a direction perpendicular to the main surface of the stage 1, and the pressure applied in the direction of the stage 1 can also be adjusted.

  Next, in FIG. 1, reference numeral 6 denotes a repair material delivery section, which is provided with a pipe-like delivery pipe 7 having delivery holes therein. Reference numeral 8 denotes a cutting assisting portion, and a cutting assisting member 9 is provided at the tip. Reference numeral 10 denotes a cutting portion, and a cutting member 11 is provided at the tip.

  Here, the sending unit 6 and the cutting assisting unit 8 are each fixed to the base 12, and the cutting unit 10 is fixed to the sending unit 6. Further, the base 12 is slidably held in the apparatus main body by a linear guide (not shown) in the horizontal direction and a linear guide in the vertical direction (not shown), and the air cylinder in the horizontal direction (not shown) and the air cylinder in the vertical direction (not shown) A predetermined amount can be driven in the left-right and up-down directions.

Therefore, the relative position of the welding electrode 5 fixed to the apparatus main body and the base 12 is
The predetermined amount is variable by the left and right air cylinders and the vertical air cylinder, and the sending unit 6, the cutting assisting unit 8, and the cutting unit 10 are integrally set to have a predetermined amount relative to the printed circuit board 2. It becomes variable.

  Next, the configuration of the sending unit 6 will be described with reference to FIG. FIG. 2 is a side view of only the delivery unit 6 in FIG. In this figure, 7 is a delivery pipe, 13 is a delivery part base, 14 is a movable block, 15 is an air cylinder, and 16 is a solenoid.

  The movable block 14 is slidably held in the direction of the arrow A with respect to the delivery base 13 by a linear guide 17 constituted by a rail 17A and a slide block 17B. Furthermore, when the rod 15A of the air cylinder 15 fixed to the delivery unit base 13 is driven, the movable block 14 moves relative to the delivery unit base 13 in the direction of the arrow A.

  A solenoid 16 is fixed to the movable block 14, and the tip of the rod 16A is in contact with a substantially L-shaped rotating member 18 that rotates about a fulcrum 18A. When the rod 16A presses the rotating member 18, the tension coil spring 19 extends, and at the same time, the rotating member 18 rotates about the fulcrum 18A, and the pressing surface 18B at the other end is separated from the opposing pressing surface 20. When the rod 16 </ b> A is not pressed, the pressing surface 18 </ b> B presses the opposing pressing surface 20 with a predetermined pressure by the tension of the tension coil spring 19.

  Next, a method for attaching the repair material 4 to the delivery unit 6 will be described. First, the front end of the repair material 4 accommodated in the shape of a spinning wheel is inserted into the first introduction path 22 at a position indicated by 21 (two-dot chain line indicated by 23). Furthermore, it penetrates the contact surface between the pair of felts 24 and 25 and penetrates into the second introduction path 26 (two-dot chain line indicated by 27).

  Here, the pair of felts 24 and 25 are attached to the tips of two protrusions 29 and 30 extending from the delivery base 13, respectively, and a ribbon shape (cross-sectional shape is substantially rectangular) between the contact surfaces of each other. ) Of the repair material 4 is allowed to pass through, thereby restricting the movement of the repair material 4 in the twist direction. Furthermore, an appropriate braking force is given to the movement of the repair material 4 in the feeding direction by the frictional force. Finally, the repair material is inserted into the delivery pipe 7 through the space between the pressing surface 18B and the pressing surface 20 facing the pressing surface 18 (two-dot chain line 28).

  The welding work is performed after the repair material 4 is mounted in this manner. Here, the operation of the delivery unit 6 performed in the welding work will be described. First, the solenoid 16 is driven and the tip of the rod 16 </ b> A presses the rotating member 18. Thereby, the pressing surface 18B is separated from the opposing pressing surface 20, and the repair material 4 held at a predetermined pressure therebetween is released.

  Next, the air cylinder 15 is driven, and the movable block 14 moves toward the air cylinder 15 by pulling the rod 15A toward the air cylinder 15 main body. At this time, the pressing surface 18 </ b> B releases the repair material 4, and the friction force between the repair pipe 4 and the delivery pipe 7 that moves with the movement of the movable block 14 and the repair material 4 is extremely small.

  On the other hand, the felts 24 and 25 fixed to the delivery base 13 through the protrusions 29 and 30 hold the repair material with a constant frictional force. Therefore, the drive of the air cylinder 15 described above causes the movable block 14 to move toward the air cylinder 15 without the movement of the repair material 4, and as a result, the delivery is fixed to the movable block 14 and moved together with the movable block 14. The length of the repair material 4 protruding from the tip of the tube 7 is increased by the stroke of the movable block 14.

  Next, when the drive of the solenoid 16 is stopped, the pressing surface 18B and the opposing pressing surface 20 hold the repair material 4 by the tension of the tension coil spring 19, and then the air cylinder 15 is driven in the reverse direction to move the movable block 14 to the original position. Return to position. At this time, since the holding force by the pressing surface 18B and the opposing pressing surface 20 exceeds the frictional force of the pair of felts 24 and 25, the repair material 4 has a stroke of the movable block 14 adjusted to a predetermined movement amount. It will be sent out for minutes.

A feeding mechanism is configured by the members used for feeding out the repair material 4 and the configuration thereof. Further, when the solenoid 16 is driven to release the repair material 4 after the welding operation of the welding electrode 5 and the air cylinder 15 is further driven, only the delivery pipe is withdrawn from the welded portion, leaving the repair material 4 in place. It will be. This operation is used immediately before the cutting operation of the repair material 4 during the disconnection repair operation described later.

  Next, the configuration and operation of the cutting assisting unit 8 will be described with reference to FIG. FIG. 3 is a side view in which only the cutting assisting portion 8 in FIG. 1 is extracted. In this figure, 9 is a cutting assistance member, 31 is a cutting assistance part base, 32 is an air cylinder, 33 is a slide block, and 34 is a rail.

  The cutting auxiliary part base 31 is fixed to the base 12 shown in FIG. 1, and the slide block 33 is fixed to the cutting auxiliary part base 31. Further, the rail 34 is engaged with the slide block 33 and is slidably held in the direction of the arrow (a direction parallel to the printed circuit surface).

  Here, when the rod 32A of the air cylinder 32 fixed to the cutting assisting portion base 31 is driven, the rail 34 fixed thereto via the block 35 moves relative to the cutting assisting portion base 31 in the direction of the arrow A. To do. Therefore, the cutting assisting member 9 fixed to the tip of the rail 34 is moved relative to the cutting assisting portion base 31 in the direction of the arrow B by driving the air cylinder 32.

  Next, the configuration and operation of the cutting unit 10 will be described with reference to FIG. FIG. 4 is a side view in which only the cutting part 10 in FIG. 1 is extracted. In this figure, 11 is a cutting member, 41 is a cutting part base, 42 is an air cylinder, 43 is a linear guide, and 44 is a movable block.

  The cutting part base 41 is fixed to the shaft 13A protruding from the delivery part base 13 shown in FIG. 2, and the movable block 44 is connected to the cutting part base 41 by a linear guide 43 composed of a rail 43A and a slide block 43B. It is slidably held in the direction of arrow c. Furthermore, when the rod 42A of the air cylinder 42 fixed to the cutting part base 41 is driven, the cutting member 11 fixed to the tip of the movable block 44 moves in the direction of the arrow C (printed circuit surface) with respect to the cutting part base 41. (In a diagonal direction).

  Therefore, the sending part 6, the cutting assisting part 8 and the cutting part 10 can move integrally with the movement of the base 12, and the sending part 6 can send the repair material 4 alone in the direction of the arrow A. The cutting assisting part 8 can drive the cutting assisting member 9 alone in the direction of arrow A, and the cutting part 10 can independently drive the cutting member 11 in the direction of arrow c.

  Next, the operation for repairing the breakage of the conductor pattern of the printed circuit board using such a mechanism will be described with reference to FIGS. Although the configuration of the implementation is the same as that shown in FIG. 1, in FIGS. 5 and 6, in addition to the printed circuit board 2, the repair material 4, the welding electrode 5, the delivery pipe 7, the cutting auxiliary member 9, Only the cutting member 11 is shown and described.

  First, FIG. 5A shows the home position during standby. Here, the electrode 5 is positioned above the surface of the printed circuit board 2 with a space therebetween, and the delivery tube 7, the cutting auxiliary member 9, and the cutting member 11 are integrally separated from the electrode 5 by a predetermined distance. Further, at this time, the repair material 4 is in a state of protruding from the tip of the delivery pipe by a predetermined amount by the feeding operation described above, and the cutting auxiliary member 9 and the cutting member 11 are in a position retracted from the cutting position.

  Next, as shown in FIG. 5 (b), the delivery pipe 7, the cutting auxiliary member 9 and the cutting member 11 are integrally moved in the direction of the welding electrode 5. Thereby, it will be in the state where the front-end | tip of the repair material 4 was applied to the front-end | tip of the welding electrode 5, and the relative alignment with the welding electrode 5 and the repair material supply mechanism can be confirmed.

  Next, as shown in FIG. 5C, the delivery pipe 7, the cutting auxiliary member 9 and the cutting member 11 are integrally lowered in the direction of the printed circuit board 2. Thereby, the front-end | tip of the repair material 4 can be aligned with a 1st welding position. As described above, the alignment on the horizontal plane at this time is performed by driving the stage 1 before the welding operation.

  Next, as shown in FIG.5 (d), the welding electrode 5 descend | falls and 1st welding is performed. Further, the pressing surface (18B in FIG. 2) in the delivery part releases the repair material 4, and the delivery pipe 7 is retracted from the welded part as shown in FIG. 5 (e). Next, as shown in FIG. 6 (f), the cutting auxiliary member 9 first moves in the direction of the welding electrode 5, and then the cutting member 11 moves from the oblique direction toward the cutting auxiliary member 9, and on the cutting auxiliary member 9. The repair material 4 is cut. One side of the cut repair material 4 is welded to the conductor pattern by the first welding, and the other end is cut at a position where the length to the second welding position is secured.

  Next, as shown in FIG. 6G, the delivery pipe 7, the cutting auxiliary member 9, and the cutting member 11 move horizontally in a direction away from the welding electrode 5 integrally. Further, as shown in FIG. 6 (h), the delivery tube 7, the cutting assisting member 9 and the cutting member 11 together with the welding electrode 5 move upward integrally and are separated from the printed circuit board 2, and on the printed circuit board 2. The stage 1 is driven so that the second welding position is directly below the welding electrode 5.

  Next, as shown in FIG. 6 (i), the welding electrode 5 is lowered to perform the second welding, while the cutting assisting member 9 and the cutting member 11 are retracted in directions opposite to the cutting positions. Further, as shown in FIG. 6 (j), the welding electrode 5 rises and is separated from the printed circuit board 2, while the delivery pipe 7 moves in the feeding direction of the repair material 4 together with the repair material 4. Further, when the operation of FIG. 6J is completed, the home position which is the state of FIG. 5A is returned.

The side view which shows the repair material supply mechanism of 1 embodiment of this invention The side view which shows the sending part of one Embodiment of this invention The side view showing the cutting auxiliary part of one embodiment of the present invention. The side view which shows the cutting part of one Embodiment of this invention The side view which shows the operation | movement of disconnection repair of one Embodiment of this invention The side view which shows the operation | movement of disconnection repair of one Embodiment of this invention A perspective view and a side view showing a conventional embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stage 2 Printed circuit board 3 Conductor pattern 4 Repair material 5 Welding electrode 6 Sending part 7 Sending pipe 8 Cutting auxiliary part 9 Cutting auxiliary member 10 Cutting part 11 Cutting member 12 Base

Claims (1)

When repairing the disconnection of the printed circuit, a repair material supply mechanism for supplying repair material to a repair location, a delivery hole for sending a repair material, the repair material for delivery predetermined length from said delivery hole In addition, the repair material is released by separating the pair of opposing pressing surfaces.
While moving, it moves in the direction of evacuation from the weld, and then compensates with the pair of holding surfaces.
A feed mechanism that holds the repair material and moves in the direction of the welded portion, a cutting auxiliary member that moves in a direction parallel to the printed circuit surface and assists in cutting the repair material, and an angle with respect to the printed circuit surface and a cutting member for cutting the repair material moving in the direction, the auxiliary cutting member
Immediately before the cutting member and the cutting member move for cutting the repair material,
A pair of holding surfaces release the repair material, and the feed hole is welded together with the feed mechanism.
Repairing material supply mechanism characterized that you save the part.

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