JPS6239904Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a clamping device capable of stably clamping a workpiece to a portion of an electrode.

In recent years, with the development of the optical industry, welding machines have been used in the manufacturing process of various light-using devices such as light-emitting diodes, photodiodes, laser diodes, and devices that combine these with light guides such as optical fibers. It is increasing.

Conventionally, a welding jig as shown in FIG. 1 has been used as a device for welding the members constituting such a light-utilizing device.

To explain this welding jig with reference to Fig. 1, 1,
2 is an upper electrode body and a lower electrode body, respectively; 3 is a pipe-shaped guide member that guides the lower electrode body above these along the direction of the optical axis Z; 4 and 5 are upper and lower electrode bodies 1 and 2, respectively. The fixed electrode chips 6a and 6b are the base portion and case of the light-utilizing device 6 to be welded, and 7 is a clamping device for fixing the base portion 6a of the light-utilizing device 6.
8 is a spring.

A light-utilizing device 6 can be produced using a welding jig with such a structure.
When resistance welding the base portion 6a and the case 6b, first move the upper electrode main body 1 upward along the guide member 3 and fix it, and then insert the case 6b into the engagement hole 4a of the upper electrode chip 4. At the same time, the base portion 6a is fixed to a predetermined location of the lower electrode chip 5 by the clamp device 7. Thereafter, the upper electrode body 1 is lowered along the guide member 3, and a predetermined pressure is applied between the base part 6a and the case 6b, and current is applied between the upper and lower electrode bodies to separate the base part 6a and the case. 6b is welded to obtain a light-utilizing device.

As shown in FIG. 2, a conventional clamp device 7 used in such a welding jig includes a clamp piece 7b fixed to the lower electrode chip 5 with a screw 7a, and a movable clamp that can slide on the lower electrode chip. Piece 7c,
It consists of a screw 7d that fixes this movable clamp piece 7c to the lower electrode chip 5, and a drive member 7e that advances and retreats the movable clamp piece 7c, and this drive member 7e is a supporter 7e ₁ fixed to the lower electrode chip 5, It consists of a shaft 7e ₂ rotatably engaged with this support 7e ₁ and its head 7e ₃ . The clamp pieces 7b and 7c have presser portions 7b ₁ and 7c ₁ that define a shape corresponding to the bottom shape of the base portion 6a of the object to be welded, here the light-utilizing device.

When clamping the base portion 6a using such a clamping device, the head portion _7e3 is rotated to move the shaft _7e2 back to an appropriate position, and the holding portions 7b1 and _7b1 of each of the clamp pieces 7b and 7c are The base part 6a is placed on the lower electrode chip 5 between the base part _7c1 and the lower electrode chip 5.
Next, by rotating the head 7e ₃ and advancing the shaft 7e ₂ , the movable clamp piece 7c is moved to the left in the drawing, and the holding portion 7 of the clamp pieces 7b, 7c is moved.
While gripping the base part 6a with b ₁ and 7c ₁ , tighten the screw 7.
d was tightened.

According to such a conventional clamp device, workability is extremely poor, and since the base part is held down by the holding parts 7b ₁ and 7c ₁ , the fixing position of the base part is affected by the machining accuracy of the holding parts. However, when the movable clamp piece 7c is finally fixed with the screw 7d, a positional shift occurs.

The present invention eliminates such drawbacks, and
A first clamp piece fixed to a portion of the lower electrode, a second clamp piece that can slide on the lower electrode surface, a spring that elastically connects the first and second clamp pieces, and a handle. a rotating member capable of rotating around an axis by a rotary member;
The welding jig is characterized in that the welding jig is equipped with a clamp device consisting of a connecting rod that mechanically connects the clamp pieces.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

The upper electrode main body 1 includes a first movable member 10 that can be moved in the Y direction perpendicular to the paper surface by the sliding action of the sliding portion _S1 when driven by a Y-axis fine adjustment device (not shown); The second movable member 11, which engages with the first movable member via the sliding portion _S2 and is movable in the X direction, which is the horizontal direction in the drawing, moves in the Y direction and the X direction, respectively, due to an external force. ,X,
It can be moved to any position in the Y direction. These upper electrodes, first and second movable members 10 and 11
is supported by the electrode holder 9. Electrode holder 9
The guide shaft 12 is moved upward by the bearing part 9a,
The electrode holder 9 is electrically insulated from the bearing part 9a by an insulating part 9b, and the upper electrode 1 is located in the center so that it can move in either the X or Y direction. It has a through hole. The guide shaft 12 is implanted in a base 13, and the lower electrode 2 is fixed to the base 13.
A connector 14 is provided in the space 2a of the lower electrode 2, and when the base portion 6a of the light utilization device is fixed to a predetermined surface of the lower electrode 2 by the clamp device 7, the connector 14 is implanted into the base portion 6a. The two terminals 6c and 6c' are the lead terminals 14 of the connector 14.
a, 14a'. The lead terminals 14a, 14a' are selectively connected to a DC power source 16 by a switch 15.

The electrode chip 4 has a cavity 4a that can be tightly engaged with the outer wall of the case 6b of the light-utilizing device.
The case 6b, which is attached to the upper electrode 1, is located opposite to the light utilization device 17 disposed within the cavity 4a and the cavity of the upper electrode 1. This light utilization device 17 is an electric-to-optical conversion element when the object to be welded is a light-receiving element, and is an optical-to-electrical conversion element when the object to be welded is a light-emitting element. The lead terminal of the light utilization device 17 is connected to the lead wire 19 led out through the outlet of the conductive lid 18 of the upper electrode 1 and the switch 20 for measurement and measurement.
It is connected to the drive device 21.

Next, an explanation will be given of the operation of resistance welding the base portion and the case of a light-utilizing device using such a welding jig. First, while the electrode holder 9 is stopped at the upper limit position, the base portion 6a of a light-utilizing device, such as a laser diode, is set on the lower electrode 2 and fixed in a predetermined position with the clamp device 7. In this state, the lead terminals 6c, 6c' planted below the base portion 6a are engaged with the connector terminals 14a, 14a'. Further, the case (cap) 6b of the optical device is engaged with the engagement hole 4a of the electrode chip 4, and fixed with the fixing member 23 so that it does not move.

Thereafter, a lift drive device (not shown) is operated to lower the electrode holder 9, and the electrode holder 9 is stopped at a position where a pressing force such that the base portion 6a and the case 6b are lightly abutted is applied. This pressing force is large enough to allow the base portion 6a and the case 6b to move while relatively abutting each other without causing stress during optical axis alignment that will be performed later. detected by the device. In this case, the base portion 6a and the case 6b are not necessarily
It is not necessary to make contact with the electrode holder 9, and the electrode holder 9 may be stopped at a position slightly separated from the electrode holder 9. In this case, the position at which the electrode holder should stop can be detected using a photoelectric detection device or the like.

After that, switches 15 and 20 are closed. When the switch 15 is closed, the optical semiconductor element mounted on the base portion 6a is energized by DC power from the DC power supply 16 and emits light. This light is input to the light utilization device 17 through the light transmitting portion of the case 6b, and the light utilization device 17 outputs electrical energy proportional to the input light energy. This electrical energy is suitably processed and converted into a useful electrical signal to drive an X-axis drive and a Y-axis drive (both not shown).
is energized to drive the X-axis fine adjustment device 22 and the Y-axis fine adjustment device (not shown) to align the optical axis.

With such a welding jig, alignment of the optical axis of a light-utilizing device can be performed automatically and efficiently, and can also be performed with considerably high accuracy. Therefore, the work of clamping the base part 6a to a predetermined position of the lower electrode 2 must be done efficiently, and the position of the clamped base part 6a must not shift when aligning the optical axis. be.

An embodiment of this clamping device shown in FIGS. 4 and 5 can fully satisfy these requirements.

In FIGS. 4 and 5, the first clamp piece 7A is fixed onto the lower electrode 2 by a screw 7B, and has a V-shaped holding portion 7A1. The second movable clamp 7C has a U-shaped holding portion 7C1 at a position facing the holding portion 7A1 and has a play hole 7D, and the screw 7E is loosely fitted into the play hole 7D. A pair of spring hooks 7F and 7 are provided on each side of the first and second clamp pieces 7A and 7B.
F', 7G and 7G' are planted, and springs 7H and 7H' are tensioned on spring hooks 7F and 7G, 7F' and 7G', respectively. A connecting plate 7I is attached to the second clamp piece 7C using spring hooks 7G and 7G', and one end of the connecting rod 7K is connected to this connecting plate by a pin 7J, and the other end is connected by a pin 7L. It is coupled to the rotating member 7M. The rotating member 7M is pivotally connected to the guide shaft 12 shown in FIG.
The rotating member 7M is rotated by the handle 7N.

To explain the operation of the clamp device having such a configuration, first, the handle 7N is sufficiently rotated in the direction of arrow X, and then the handle 7N is rotated about its axis to fix the tip of the handle 7N to the guide shaft 12. . In this state, the second movable clamp member 7C is located at the farthest position from the first clamp 7A via the rotating member 7M, the connecting rod 7K, and the connecting plate 7I. In this state, the holding portions 7 of the first and second clamp pieces 7A and 7C are
When the base portion 6a of the light utilization device is placed on the surface of the lower electrode 2 between A1 and 7C1, and then the handle 7N is rotated in the direction opposite to the arrow X, the second clamp member 7C is moved by the springs 7H and 7H' Due to the elastic force of
The base portion 6a is clamped by A1 and 7C1.
The clamping force applied to the base portion 6a in such a clamped state is determined by the elastic force of the springs 7H and 7H', and is therefore constant.

Therefore, according to the present invention, it is possible to always clamp the base portion 6a with a constant clamping force, so there is no need to apply a force large enough to adversely affect the optical semiconductor element mounted on the base portion. , and because it is clamped by the elastic force of the spring, the work efficiency is extremely high.
Holding parts 7A1, 7 of second clamp pieces 7A, 7C
Since the base portion 6a is substantially clamped at the point C1, it has great practical effects such as being able to clamp it at a very accurate position.

Incidentally, in the above embodiment, the base portion of the light-utilizing device was described as the object to be welded, but of course other objects to be welded may also be used.

[Brief explanation of the drawing]

1 and 2 are views showing a conventional welding jig and a clamping device, respectively, and FIGS. 3 to 5 are views for explaining an embodiment of the present invention. 2... Lower electrode, 6a... Work to be welded, 7... Clamp device, 7A, 7C... First and second clamp pieces, 7H, 7H'... Spring, 7K... Connecting rod, 7M... Rotating member, 7N...Handle, 1
2... Guide shaft.

Claims (1)

[Scope of utility model registration request] A welding jig comprising at least upper and lower electrodes for welding and a clamping device for clamping a workpiece to be welded at a predetermined position on the lower electrode, the welding jig being a first clamp fixed to a portion of the lower electrode. a second clamp piece movable relative to the lower electrode surface, a spring elastically coupling the first and second clamp pieces, a rotating member rotatable about an axis by a handle; A welding jig equipped with a clamping device, characterized in that it consists of a connecting rod that mechanically connects a rotating member and the second clamp piece.