JPH05220674A - Wire holding device - Google Patents

Abstract

PURPOSE:To dispense with the troublesome work for holding a twin wire which is strayed and unlocated in a wire holding device. CONSTITUTION:A piezoelectric member 1 having one end part fixed and the other end part supported in such a manner as to be capable of displacing, an extending mechanism 2 having N arms 2x (x=1...N) acting as levers, respectively, to vertically extend the displacement of the piezoelectric member 1, and a holding mechanism 3 for holding/releasing a twin wire 4 are provided. The holding mechanism 3 has a fixed member 3a and a movable member 3c horizontally erected on the fixed member 3a through a parallel spring 3b and oscillated down when pressed down to an imparting part 2b, the respective end parts of the fixed member 3a and the movable member 3c are mutually collided to form a holding part 5, and the holding part 5 holds the twin wire 4 in such a manner that it can not be moved when the piezoelectric member 1 is extended through the extending mechanism 2, gently holds it in such a manner as to be capable of sliding when the piezoelectric member is half-extended, and releases it when the piezoelectric member is contracted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire gripping device, which has three operations of a gripping state and a releasing state and a loosening state in which the wire can move smoothly. The present invention relates to a wire gripping device that does not require.

[0002] In recent years, along with the miniaturization of various electronic equipments, the miniaturization and high-density mounting of electronic parts such as semiconductor devices have been actively promoted. Among them, for example, printed boards used in high-performance electronic devices such as large computers are further advanced in high-density wiring and multi-layering.

By the way, in the manufacturing process of a printed circuit board, in order to cope with a disconnection of a wiring pattern or a change of a route of the wiring pattern, a work of skipping and modifying a so-called jumper wire connecting the pads with a wire is frequently performed. .. However, since the printed boards are becoming higher in density and finer in patterning, the correction work by wire connection of the printed boards has hitherto been carried out manually while looking through the microscope. However, automation is strongly desired.

[0004]

2. Description of the Related Art Printed boards have been designed to have higher wiring pattern densities and multiple layers in response to downsizing of parts to be mounted and downsizing of equipment on which the printed boards are mounted. Therefore, it is not easy to redo an incorrect wiring pattern or a wiring pattern accompanying the improvement from the pattern design. In addition, it is often necessary to correct manufacturing defects such as short circuits and disconnections. Therefore, the wiring pattern is corrected by wire connection.

[0006] The correction of the wiring pattern by the wire connection often differs depending on the target printed board, so that automation is troublesome and has conventionally been performed manually. However, this correction work is a troublesome work of handling the wire with two tweezers held in both hands while looking through the microscope, and has been recently automated.

FIG. 4 is a diagram for explaining the operation of the gripping portion in the conventional automatic wiring, and FIG. 4 (A) shows the unwound state before gripping the wire.
FIG. 4B is a grasped state in which the wire is grasped, FIG. 4C is a grasped state in which the wire is pulled out and joined, and FIG.
(D) shows a released state in which the wire is released. In the figure,
Reference numeral 5 is a gripping portion, 6 is a wire, 7 is a printed board, 7c is a pad, and 8 is a wire discharging portion.

In the conventional automatic wiring machine, when the wire 6 is gripped and drawn or joined to the pad 7c of the predetermined printed board 7, the wire 6 to be handled is a single wire. Therefore, it suffices to simply join each of the one end and the other end of the wire 6 to the predetermined pad 7c. Therefore, the automatic wiring only needs to be provided with one gripping device, and further, it has only to have two operations, that is, a gripping state in which the wire 6 is gripped and a releasing state in which the wire 6 is released and released.

That is, FIG. 4A shows a released state in which the grip portion 5 is not gripping the wire 6, and the wire 6 projects from the wire discharge portion 8 and is free. And
In FIG. 4B, the grip portion 5 grips and supports one end portion of the wire 6. Next, while the grip portion 5 moves to pull out the wire 6 from the wire discharge portion 8, the wire 6 is drawn to the position of the predetermined pad 7c of the printed board 7 as shown in FIG. One end is brought into contact with the pad 7c and joined. When the joining of one end of the wire 6 is completed, the grip portion 5
Releases the wire 6. If this series of work is similarly performed on the other end of the wire 6, one step of the work of modifying the wiring pattern by wire connection is completed.

However, if the wire 6 is a single wire, it is easy to pick up noise. Therefore, for an important wiring portion that dislikes noise, for example, a twin wire in which a signal line and a ground line are paired is used.

FIG. 5 is a schematic explanatory view of an example of a twin wire wiring work process. FIG. 5 (A) is a plan view of a process of grasping and pulling out the initial end portion, and FIG. 5 (B) is a plan view of the initial end portion. FIG. 5C is a side view of the step of joining to one pad, and FIG. 5C is a plan view showing the stray wire before the step of gripping the end portion. In the figure,
The names corresponding to the numbers are the same as those in FIG. 4, 4 is a twin wire, 4a is a first end portion, 4b is an end portion, 6a is a core wire, 7a is a first pad, 7b is a second pad, and 51 is a first wire. Grip part, 52 is the second
It is a gripping part.

In the wiring work of the twin wire 4, since it is known which pad and pad of the printed board 7 are to be wired, the first pad 7a of the twin wire 4 to be wired.
The coating is removed in advance from the initial end portion 4a connected to and the end portion 4b connected to the second pad 7b to expose the core wire 6a. That is, since the coating is removed from the initial end portion 4a and the terminal end portion 4b, the twin wire 4 is separated into two single wires 6 at that portion.

First, referring to FIG. 5 (A), the first grip portion
At 51, the initial end portion 4a of the twin wire 4 is gripped, and the exposed core wire 6a of the initial end portion 4a is pulled out from the wire discharge portion 8 until it is located on the first pad 7a of the printed board 7.

Then, as shown in FIG. 5B, the first grip portion 51 is tilted to bring the core wire 6a of the initial end portion 4a into contact with the first pad 7a, and the joining jig 9 is used for soldering, for example. Is joined. Then, the first grip portion 51 releases the twin wire 4.

Next, as shown in FIG. 5 (C), when the printed board 7 is moved, the twin wire 4 is pulled and pulled out from the wire discharge portion 8, and the core wire 6a is placed near the second pad 7b. The exposed end portion 4b appears. Then, the vicinity of the end portion 4b is gripped by the moved first grip portion 51 and the waiting second grip portion 52, and the end portion 4b is bonded to the second pad 7b.

By the way, as described briefly here, the twin wire 4 has two wires 6 paired with each other, and each wire 6 is connected to different pads having different wiring paths. The joining of the end 4a and the end 4b is repeated twice each.

[0016]

As described above, in the modification of the wiring pattern using the twin wires, the terminal end where the core wire is exposed is gripped again by the gripping device and the joining is performed.

However, the twin wire pulled out from the wire discharge part after the initial end was joined was 100 μm
Because it is a thin wire that divides φ, it strays in the space and can freely exist until its position is not fixed. Therefore, in order to grip the twin wire by the gripping device again, it is troublesome to find the twin wire from a free space, grip a predetermined portion of the terminal end portion, and position the twin wire on a predetermined pad.

Therefore, according to the present invention, there are two cases of the grasping state and the releasing state.
It is an object of the present invention to provide a wire gripping device which has a loose state in which the wire can move smoothly in addition to the two operating states and which does not require the troublesome work of gripping a stray twin wire.

[0019]

The above-mentioned problem is to have a piezoelectric member, an enlarging mechanism, and a gripping mechanism, and the piezoelectric member expands and contracts according to the magnitude of the applied voltage. Part is fixed to a supporting member, and the other end is movably supported, and the enlarging mechanism includes N (N> 1) consecutive arms (2x) (x = 1 ... N). ) Each of which extends the displacement of the piezoelectric member in the vertical direction by levering (Lx / 1) times, and the first arm includes a receiving portion for receiving the displacement of the piezoelectric member and an N-th arm. The gripping mechanism is for gripping / releasing a twin wire, and has a fixing member fixed to the enlarging mechanism and a horizontal spring that is horizontally attached to the fixing member. Having a movable member that swings downward when pressed to the feeding portion, Each end of the material and the movable member collides with each other to form a grip portion, and the grip portion cannot move the twin wire when the piezoelectric member is extended through the expansion mechanism. It is solved by a wire gripping device which is configured to hold the twin wire slidably and loosely when it is half-extended and release the twin wire when it is contracted.

[0020]

While the conventional twin wire gripping device has only two operations, a gripping state and a releasing state, the present invention allows three operations including a loosening state. ..

That is, the minute expansion and contraction of the piezoelectric member is expanded so that the gripping part performs a large operation by using an expansion mechanism in which a plurality of levers are connected in series. Then, the degree of expansion and contraction of the piezoelectric member is adjusted according to the applied voltage, and the operation of the gripping part, which has expanded and contracted, is adjusted.

Then, in addition to the conventional two operations of gripping the wire so that the gripping portion does not move or unraveling the wire so that the wire is free, slipping is possible by loosely gripping the wire and pulling the wire. It can be in a loose state of motion. Then, it is possible to eliminate the troublesome work of searching for and grasping the stray wire when joining the terminal ends of the wires.

[0023]

1 is a perspective view of a first embodiment of the present invention. FIG. 1 (A) is a disengaged state, FIG. 1 (B) is a grasped state, and FIG. 2 is a main part showing the operation of FIG. 2A is an enlarged side view of the operation of the enlarging mechanism, FIG. 2B is an operation of the gripping mechanism, and FIG. 3 is an enlarged side view of an essential part of the second embodiment of the present invention. 3A shows a released state, FIG. 3B shows a loosened state, and FIG. 3C shows a grasped state. In the figure, 1 is a piezoelectric member, 1a is a support member,
2 is an enlarging mechanism, 2a is a receiving part, 2b is a baffle part, 2x is an X-arm, 3 is a gripping mechanism, 3a is a fixing member, 3b is a parallel spring, 3c is a movable member, 4 is a twin wire, 5 is a gripping part. , 5a is a lower grip groove, 5b is an upper grip groove, and 5c is a protrusion.

Embodiment 1 In FIG. 1, a piezoelectric member 1 is, for example, a rod-shaped ceramic piezoelectric element, and expands and contracts depending on the magnitude of a voltage applied to an electrode (not shown). The piezoelectric member 1 has one end fixed to the support member 1a and the other end movably supported.

The enlarging mechanism 2 has an integral structure in which a thick metal plate having elasticity is cut out. That is, a plurality of X-th arms 2x are provided in a ladder shape inside, leaving the peripheral portion in a frame shape, and each X-arm 2x is a lever.

The lever formed by the X-th arm 2x is shown in FIG.
(A), the first, looking at the first arm 2 ₁ X = 1, the distance to the first pressing point P _1, which is pressed against the piezoelectric element 1 by the receiving portion 2a from the fulcrum F ₁ 1, the fulcrum F _If the distance between ₁ and the pressing point P ₂ is L ₁ , the pressing point P ₂ is the pressing point P _2.
1 becomes L ₁ times the pressed distance.

[0027] Then, the X = 2 of the second arm 2 _2, 1 the distance from the fulcrum F ₂ to the second pressing point P _2, the distance to the fulcrum F ₂ and the pressing point P ₃ When L _2, The pressing point P ₃ is L ₂ times the distance at which the pressing point P ₂ is pressed. Accordingly, the pressing point P ₃ is the distance which the pressing point P ₁ is pressed (L ₁ ×
L ₂ ) times.

[0028] Thus, the pressing points Pn in the N arms 2n of X = N, the distance pressing point P ₁ is pressed (L ₁ ×
L ₂ × ·· Ln) times, and the minute displacement of the piezoelectric member 1 can be sequentially increased according to the number of X-arms 2x connected in series.

The gripping mechanism 3 is for gripping and releasing the twin wire 4, and includes a fixed member 3a fixed to the peripheral portion of the enlarging mechanism 2 and a movable member in which a parallel spring 3b is horizontally mounted on the fixed member 3a. 2C, the movable member 3c swings in parallel with the fixed member 3a as shown in FIG. 2B. And, like the enlarging mechanism 2, it has an integrated structure in which a thick metal plate having elasticity is cut.

The fixed member 3a has an L-shaped projecting end provided with a lower gripping groove 5a upward, and the movable member 3c has an I-shaped projecting end facing the lower gripping groove 5a. Groove 5b
Is provided. Then, the fixed member 3a and the movable member
The gripping portion 5 is configured by 3c, and the lower gripping groove 5a and the upper gripping groove 5b are abutted or separated by the vertical swing of the movable member 3c. FIG. 1 (A) shows a state in which the lower gripping groove 5a and the upper gripping groove 5b are in abutment with each other, and FIG. 1 (B) shows a state in which they are separated from each other.

By controlling the applied voltage to change the degree of expansion / contraction of the piezoelectric member 1, the lower grip groove 5a can be obtained.
The degree of abutment of the upper grip groove 5b can be adjusted. Therefore, three states, namely, a released state in which the twin wire 4 is completely released, a loose state in which the twin wire 4 is slidly grasped, and a grasped state in which the twin wire 4 is firmly grasped so as not to move, are created. You can

As described above, when the gripping device according to the present invention is used, when the first end of the twin wire 4 is joined, the wire should be grasped in a loosely held state in advance and slipped, so that the end portion is joined. There is no need for the troublesome work of finding and gripping a wire whose position is not fixed due to a stray.

Example 2 In the correction of the wiring pattern by the wire connection, as the pattern of the printed board becomes finer and higher in density, the positioning for joining requires high accuracy of several tens of μm. Therefore, in order to improve the accuracy of gripping the twin wire 4 with the grip portion 5, the lower grip groove 5a or the upper grip groove 5b is provided with a protrusion 5c that traces the cross section of the twin wire 4 in the central portion.

In this way, as shown in FIG. 3 (A), the upper gripping groove 5b is lifted up to release the twin wire 4, and as shown in FIG. 3 (B), the upper gripping groove 5b is released. When the twin wire 4 is pulled while the 5b approaches the lower grip groove 5a and loosens the twin wire 4, the protrusion 5c fits into the recess between the two wires and slides while handling. Is becoming As a result, it is possible to prevent a problem that a fine wire of less than 100 μmφ is twisted and caught while sliding.

Further, as shown in FIG. 3C, when the upper gripping groove 5b is in close contact with the lower gripping groove 5a and grips the twin wire 4, the projection 5c fits into the recess between the two wires. Wire is positioned accurately.

Here, the X-arm 2x of the enlargement mechanism 2 is moved to the X-axis.
Although the example in which three pieces are continuously arranged at = 3 is illustrated, various modifications can be made depending on the displacement amount of the piezoelectric member 1, the thickness of the twin wire 4, and the like, as to how many pieces are arranged and how many times to enlarge. ..

[0037]

In the conventional gripping device, the operation of the gripping part is two operations, that is, the gripping state and the releasing state. It is also possible to perform a loosening action of loosely grasping and sliding.

Therefore, when one of the gripping devices grips the wire and pulls the wire in order to join the initial ends of the twin wires, if the other gripping device performs the loosening operation and slides the wire, Since it is possible to prevent the stray of the wire, it is not necessary to perform a troublesome operation of gripping the wire when joining the end portions.

As a result, the present invention greatly contributes to the realization of efficient automation of the work of correcting the wiring pattern of the printed circuit board by wire connection, which is the limit of manual work in the future.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention, in which (A) is a releasing state and (B) is a grasping state.

2 is an enlarged side view of a main part showing the operation of FIG.
(A) is the operation of the enlarging mechanism, (B) is the operation of the gripping mechanism.

FIG. 3 is an enlarged side view of a main part of a second embodiment of the present invention, where (A) is a released state, (B) is a loosened state, and (C) is a grasped state.

4A and 4B are operation explanatory views of a gripping portion in a conventional automatic wiring, in which FIG. 4A is a released state before gripping a wire, FIG. 4B is a gripped state in which a wire is gripped, and FIG. The gripped state when the wire is being held, and (D) is the released state in which the wire is released.

5A and 5B are schematic explanatory views of an example of a twin wire wiring work process. FIG. 5A is a plan view of a process of grasping and pulling out an initial end portion, and FIG. 5B is a step of joining the initial end portion to a first pad. A side view of the process, (C) is a plan view showing the stray wire before the process of grasping the end portion.

[Explanation of symbols]

1 Piezoelectric member 1a Support member 2 Enlarging mechanism 2a Receiving part 2b
Handing part 2x Xth arm 3 Grip mechanism 3a Fixed part 3b
Parallel spring 3c Moving part 4 Twin wire 5 Gripping part 5a Lower gripping groove 5b
Upper grip groove 5c protrusion

Claims (4)

[Claims] 1. A piezoelectric member (1), an enlarging mechanism (2), and a gripping mechanism (3), wherein the piezoelectric member (1) expands and contracts according to the magnitude of an applied voltage, One end is fixed to the support member (1a), and the other end is movably supported. The enlarging mechanism (2) includes N (N> 1) consecutive arms.
(2x) be one which expand (x = 1 · · N) each of the displacement of (Lx / 1) the form of the lever times the piezoelectric element (1) in the vertical direction, the first arm (2 ₁ ) Has a receiving portion (2a) for receiving the displacement of the piezoelectric member (1) and a transfer portion (2b) for imparting the displacement of the Nth arm (2N), and the gripping mechanism (3) is A device for gripping / releasing a twin wire (4), which comprises a fixing member (3a) fixed to the enlarging mechanism (2) and a horizontal spring (3b) horizontally attached to the fixing member (3a). Movable member that swings downward when pushed down by the giving portion (2b)
(3c), and the end of each of the fixed member (3a) and the movable member (3c) abuts to form a gripping part (5), the gripping part (5) Is the twin wire (4) when the piezoelectric member (1) is extended through the expansion mechanism (2).
The twin wire (4) so that it can be slidably loosened when it is half-extended and released when it is contracted. A characteristic wire gripping device. 2. The enlarging mechanism (2) and the gripping mechanism (3) are thick plate-shaped elastic members that are punched so that the peripheral portion remains like a frame, and the gripping mechanism (3 ) Is the enlargement mechanism
The wire gripping device according to claim 1, which is detachably fixed to (2). 3. The grip portion (5) is provided at a lower grip groove (5a) provided upward at an end portion of the fixing member (3a) and at an end portion of the movable member (3b). The wire gripping device according to claim 1, comprising an upper gripping groove (5b) that abuts the lower gripping groove (5a). 4. The lower grip groove (5a) or the upper grip groove (5b)
4. The wire gripping device according to claim 3, wherein the central part has a protrusion (5c) tracing the cross-sectional shape of the twin wire (4).