JPH04122099A - Electronic part clinch apparatus with lead wire sensor - Google Patents

Abstract

PURPOSE:To realize every kind of mounting conditions of electronic parts by providing a clinch apparatus consisting of a supporting device which can realize positional control and a pair of levers, limiter mechanisms loaded to the one end of respective levers, a pressurizing apparatus and adjusting screws. CONSTITUTION:After direction is corrected so that two levers of clinch apparatus correctly correspond to two lead wires, a supporting base is lifted so that the end portions of levers 11 of the clinch apparatus B are located at the inside of end portions of both lead wires and thereafter lead wires are inserted. In this case, a pressurizing apparatus D and a limiter mechanism C are placed in contact with each other without interval by adjusting screws 15 and the pressurizing apparatus D is operated to push the clinch levers 11. The end partions of levers are opened outside, clinching to the right and left the lead wires externally in contact with the levers at the side where the printed circuit board is removed. The levers are reacted and the limiter mechanism C is provided to the lever 11 with a constant play angle. Under this condition, the limiter mechanism C is electrically turned OFF and mounting of electronic parts to the printed circuit board is completed. If lead wires are not correctly inserted, the lever are not reacted and electrically turned ON, informing that there is no lead wire.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is for automatically mounting various electronic components for circuits such as capacitors, resistors, or ICs on printed wiring boards used in various electronic devices. It is connected to the electronic component clinching device with lead wire sensor used.

<Prior art> Conventional equipment for automatically mounting electronic components onto printed wiring boards uses a pressure sensor, optical sensor, voltage sensor, current sensor, etc. to connect the lead wires of electronic components to the printed wiring board. Once inserted into a specified mounting hole, its condition was checked.

<Problem to be solved by the invention> However, among the above conventional examples, those using pressure sensors,
The gap between the contact parts is only about 0.05 to 0.2 (Ill/l11), and one part of the contact parts is fixed and the other part is a movable pin, which is built into the clinch lever, and the mechanism for driving the lever. There are 2-3 (-/export) distances to the movable bin, and it is for driving the lever lol! When one mechanism operates, the shock that hits the movable bin causes the pressure applied to the clinch lever to vary depending on the thickness and hardness of the lead wires of the electronic components, making it difficult to accurately detect the condition. Ta.

In addition, means for detecting clinch motion using optical sensors have problems in that the reliability of detection accuracy decreases due to installation space and dust adhesion to the photocathode. Since it is normally detected electrically via the lead wire of the mounted electronic component, it is suitable for components that are not affected by voltage or current, such as plugs and sockets, but it is suitable for components that are not particularly affected by voltage or current, such as ICs. It has drawbacks such as being unsuitable for electronic components with low densities and lacking in versatility.

Accordingly, the present invention addresses the drawbacks of the above-mentioned conventional examples and provides a clinch device that is suitable for all mounting conditions for various electronic components.

<Means for solving the problem> A clinch device consisting of a support device whose position can be controlled, a pair of levers pivotally mounted on the support device, and a limiter mechanism attached to one end of each lever of the clinch device, a pressurizing device installed on the support device and operating the clinch device via the limiter mechanism; and a pressurizing device located between the pressurizing device and the limiter mechanism so that the pressurizing device contacts when no pressure is applied. It consists of an adjustable screw.

Function> Before the lead wire of the electronic component is inserted into the predetermined electronic component mounting hole of the printed circuit board held in a predetermined position, the support device moves the two levers of the clinch device installed on the support device into the predetermined position. First, the direction is corrected so that it corresponds to the lead wire of the book in a normal state, and then the support base is raised, and the lever tips of the clinch device are placed oppositely to each other so that they are inside the ends of both lead wires. Insert.

At this time, the pressure device and the limiter mechanism are in contact with each other without any play through the adjustment screw, so the pressure device is operated and the two clinch levers of the clinch device are pushed through the respective limiter mechanisms. As a result, the tips of both clinch levers are expanded outward from each other, and the lead wires of the electronic components circumscribed to the clinch levers are pushed left and right on the insertion side of the printed wiring board, and at this time, the clinch levers are expanded outward. Since the lever receives reaction force from the lead wire, it is used as a limiter.
Since the mechanism is installed on the clinch lever with a certain angle of play, it is electrically turned off in that state, indicating that the mounting of electronic components on the printed wiring board is completed, and is sent to the next work process. .

At that time, if the clinch lever does not touch the lead wire of the electronic component, that is, if the lead wire of the electronic component is not properly inserted into the specified mounting hole on the printed wiring board, there is no contact with the clinch lever. Since no bending stress is applied and no reaction force is applied, the limiter mechanism and the clinch lever swing together, and the limiter does not operate.This state is electrically turned on and the lead is turned on. It acts as if it is telling you that there is no line.

<Embodiments> The present invention will be described in detail below with reference to embodiments shown in the drawings. As shown in FIG. 1, the clinch device of the present invention includes a support device A, a clinch device B, a limiter mechanism C,
It consists of a pressurizing device 11'D.

First, in the support device A, a cylinder 23 that is moved up and down by a fluid such as air or oil is fixed on a fixed plate 24 installed in a work line, and a piston rod 25 of the cylinder 23 is fixed.
A support plate 22 supporting the rotating device 21 is set on the top, and the output shaft of the rotating device 21 is freely reversible, and the rotating device 21 is moved up and down by the operation of the cylinder 23. There is.

The scrunch device B has a support plate 1 attached to the output shaft end of the rotating device 21, and on the support plate 1, a pair of clinch levers 111 and 112 are swung by a common shaft 12 at 1 degree of the support protrusion provided on the upper surface. The clinch lever 11 is pivoted for free movement.
．． , each upper end 18. of the IL. ．． 182 is made to correspond to the electronic component mounting hole of the printed circuit board C, and is configured to rotate in a direction opposite to each other.

Next, the limiter mechanism C operates each clinch lever ILJ.
The clinch levers 115, 11 are located at the lower position of l□.
The swinging levers 71 and 7□ are respectively moved to the shafts 13. ．． 132, and the clinch lever 11 is pivotally mounted to be freely swingable.

112 from the lower bent shoulder portion of the swing lever 7;

The spring 14 is housed in a hollow hole bored toward the exit surface of the spring 14, and the tip of the spring 14 is attached to the swing lever 7, . 72, and the pressing elasticity of the spring is adjusted by an adjustment screw 1515□ screwed into the upper end of the hollow hole at the rear end of the spring 14, and the lock nut 16.
．． Screw 15. by 16□. ．． 152, and a screw 10. which is adjustable in position is attached to an insulating sleeve 9 horizontally inserted into the swing lever at a position close to the end surface of the clinch lever. The clinch lever 11. of the swing lever is inserted by inserting the JO2 and bringing its tip into contact with the protrusion 172 which is provided hanging down and protruding from the clinch lever, and adjusting the protrusion length of the screw 10102. ．． 112 and the screw 10.
．． 102 and the projecting piece 17, . 172 constitutes a switch function.

In the pressurizing device, cylinders 21 and 22 operated by air or oil are installed on the support plate 1, and the cylinders 21 and 22 are operated by air or oil. , 22 so that the piston rod 4 of the piston 3 is slidably inserted into the cylinder 21. The swinging lever 7 is brought into contact with the inner surface of the lever 71 (72) and is moved by the sliding movement of the piston 3.
(72) to push and move the end cover 5 and the swing lever?
, <72), and the swing lever 7
, (72) to the clinch lever 11. and the clinch lever 112, which is operated by a piston in another cylinder 22, are urged toward each other.

And each cylinder 2. Insert the adjusting screw 153 into the wall (2□) on which the end cover is not attached, and tighten the lock nut 1 on the outside to fix the position of the adjusting screw 153.
6. It becomes by screwing it on.

Incidentally, the reference numeral P2 in the figure indicates a pipe for supplying pressurized fluid when the cylinder 23 is lowered.

The above-mentioned clinch device B, limiter mechanism C, and pressurizing device 11fflD are all constructed symmetrically, so in the following explanation, parts with branch numbers attached to the reference numerals are constructed symmetrically. The operation will be explained only for one part.

Next, to describe a series of operations of the above device, first, a printed wiring board C is placed opposite to the clinch lever of the device of the present invention installed at a predetermined position on the assembly line, and an attempt is made to mount the printed wiring board C. Finger d of an insertion machine or assembly robot, etc. to insert the electronic component a,
d2 and insert the lead wire of the electronic component a into the electronic component insertion hole Cl+52 of the printed wiring board C.
Make b2 correspond.

As mentioned above, when the operation is completed, the finger cL
, d2 are lowered together with the push rod e toward the printed wiring board C while maintaining a state in which the electronic component a and the tip 1 of the push rod e are not in contact with each other, and the leads m, b, , b are printed. Insert into the component insertion hole cI + c2 of the wiring board.

Then, adjust the adjustment screw 15 according to the thickness and bending strength of the lead wire of the electronic component. By adjusting the spring 14, at the same time, the screw 101 and the protrusion 17. Adjust to maintain contact with.

Then, loosen the lock nut 163 and tighten the adjustment screw 1 so that the tip of the piston rod 4 comes into contact with the back surface of the swing lever 71.
5. The piston 3 is moved by moving the piston 3 forward and backward;
Note that (this adjustment may be made immediately before the clinch operation or after other preparatory operations), the cylinder 23 of the support device is then adjusted by supplying pressurized fluid from the pipe P] to the cylinder 23 of the support device. Push up the piston rod 25 to inscribe the tip of the clinch lever 11 inside each lead wire S, B2 of the electronic component A facing downward from the printed wiring board C, and at this time operate the rotating device 21. After correcting the position so that the direction of the clinch lever 11 exactly matches the arrangement direction of the lead wire, pressurized fluid is supplied from the piping P of the cylinder 21 of the pressurizing device to the inlet and the piston 3 inside. By pushing the piston rod 4 to the right (FIG. 1) against the elasticity of the spring 6, the tip of the piston rod 4 is set in advance by the adjustment screw 15. Since it is brought into contact with the swinging lever 71 by adjusting the swinging lever 71, the movement immediately acts on the swinging lever 71, and the swinging lever 71 is moved to the pivot shaft 13. It swings to the right from the base point as shown in FIG.

In this case, if the lead wire of the electronic component protrudes from the lower side of the printed circuit board C, the tip 18 of the clinch lever 11
Since the resistance or reaction force that clinch lever 111 receives when bending the lead wire is greater than the elasticity of spring 14, which is magazined between the other end of clinch lever 111 and swinging lever 71, swinging lever 71 bends the lead wire. 7 and clinch lever 11. After oscillating by the play angle θ formed in which direction, the pushing force by the piston rod 4 is applied to the clinch lever 11. and lead wires, ,b
2 is bent.

At this time, the tip of the screw 101 of the swing lever 7 is connected to the clinch lever 11. The screws 10. , protrusion 17. , the electric circuit leading to the power terminal E2 (E'2 is not shown) through the support protrusion 1°, the cylinder end cover 5, and the support plate 1 is turned off.
” state, and an indicator installed at a special position that detects this state determines that both lead wires S, B2, and B2 are inserted into a predetermined position on the printed wiring board C. If one or both of the lead wires are not inserted into the specified insertion holes of the printed wiring board C as shown in FIG. The pressing force exerted on the movable lever 7 is transmitted to the clinch lever 111 via the spring 14. In other words, the clinch lever 11 is moved while maintaining the play angle θ between the clinch lever 11 and the swing lever 7.
Rock the tip of □ outward.

Therefore, the contact state between the protruding piece 171 of the clinch lever and the screw 10 is maintained, and the power terminal E3, the screw 101, and the protruding piece 1
7. , the electric circuit that passes through the support protrusion 1', the cylinder end cover 5, and the support plate 1 to the power terminal E2 is kept in the "'ON" state, so that the lead wire is inserted into the printed wiring board in the display. I'm trying to tell you what hasn't happened.

In the above figure, reference numeral 20 is a board holding rod for holding and holding the printed wiring board when clinching the electronic component onto the board C.

<Effects of the Invention> The present invention is constructed as described above, and operates the switch mechanism depending on the presence or absence of reaction force acting on the clinch lever, so there is no need to provide a special glue sensor, and the construction is simple. Contact between the swing lever and the piston rod is maintained by operating an adjustment screw installed on the outside of the cylinder so that there is no play between the lever and the swing lever, so the piston rod does not suddenly move forward. However, the protrusion 1 can be moved instantaneously without causing any shocking movement to the swing lever.
7. and screw 10. A stable switching action can be obtained without the contact point opening. Alternatively, by adjusting the strength of the spring 14, it is possible to easily accommodate lead wires of different wire diameters and lead wires of different hardness, and the presence or absence of lead wires can be accurately detected using a simple switch mechanism.

In addition, since the part where the lead wires are clinched is done by the tip of the lever, the space for the clinching operation is small, and there is no problem with the chip components that have already been mounted.The configuration is extremely simple, and the clinching unit is It has excellent effects such as cost reduction.

[Brief explanation of drawings]

1 to 3 show embodiments of the present invention. Fig. 1 is a cutaway longitudinal side view of the main part of the same as above, Fig. 2 is a partially cutaway longitudinal side view of the normal clinch operation state,

Claims (1)

[Claims] 1. a clinch device comprising a support device whose position can be controlled; a clinch device consisting of a pair of levers pivotally mounted on the support device; a limiter mechanism attached to one end of each lever of the clinch device; and a limiter mechanism installed on the support device. The clinch device is comprised of a pressure device that operates the clinch device via the clinch device, and an adjustment screw that is located between the pressure device and the limiter mechanism and is in contact with the pressure device when no pressure is applied.