JPS5939896B2 - Lead wire forming machine for capacitors, fixed resistors, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lead wire forming machine for folding and crushing lead wires of capacitors, fixed resistors, etc.

Generally, for capacitors and resistors that are attached to a printed circuit board, the tip of the lead wire is folded back, crushed into a thin shape, and inserted into a small hole in the printed circuit board in order to hold it stably.

Conventionally, this process of folding back and crushing the lead wire has been carried out by folding back the lead wire 1 and then pressing it into the groove 2 of the mold 2 as shown in FIG.
Insert it inside and crush it with the suppressing piece 4.
-A shape as shown in C was obtained.

This conventional processing method has the following disadvantages.

When inserting the lead wire 1 into the groove 3 of the mold 2, the width of the groove 3 is narrow for processing reasons, and is less than 1.2 times the diameter of the lead wire.
Further, since the lead wire 1 is made of a flexible material and is easily distorted and deformed, it is likely to fail in insertion and cause malfunction.

Further, when the lead wire 1 is removed from the groove 3 after processing, the lead wire 1 is likely to be distorted and deformed.

In order to prevent this deformation, when removing lead wire 1, it is necessary to leave all workpieces such as capacitors open except for the lead wire held in the groove. Since the workpiece falls, it is not possible to realize an apparatus (see the second embodiment described later) in which the workpiece is held in a fixed direction and sent to the next process.

The present invention eliminates these inconveniences and provides a lead wire forming machine that allows lead wires to be inserted into and removed from grooves easily and reliably.

The present invention is a lead wire forming machine that folds and crushes a lead wire, in which two pieces move forward to a processing position, approach each other, hold the lead wire folded back during pre-processing, and then separate and move to a retracted position. This is a lead wire forming machine for capacitors, fixed resistors, etc., which is provided with clamping pieces and further provided with a pressing piece that enters between adjacent clamping pieces and presses and crushes the lead wire against a suppression table.

The illustrated embodiment will be described below.

3 to 6 show the molding machine 10 of the first embodiment.

In this molding machine 10, 11 and 12 are clamping pieces,
It is provided at the tip of an arm 14, 15 that rotates around the shaft 13, and can move up and down.

This shaft 13 is connected to an arm 17 that rotates around a shaft 16.
The shaft 13, that is, the clamping piece 11.12 is attached to the third
It is possible to move from the retracted position shown in the figure to the processing position shown in FIG.

Reference numerals 18 and 19 denote holders, which horizontally sandwich and hold a workpiece 21 such as a resistor, and both sides of the holder 19 serve as press tables 20.

The workpiece 21 is held by the holders 18 and 19 and undergoes pre-processing with the clamping pieces 11.12 in the retracted position, and its lead wire 22 is cut, bent, and folded back, as shown in FIG. As shown in FIG. 2, the holding tool 19 is processed so as to extend along the suppressing base 20 on the side surface thereof.

Thereafter, the arm 17 rotates, and the clamping pieces 11.12 move to the processing position, approach, and clamp the lead wire 22.

Note that the clamping pieces 11 and 12 have U-shaped tips and are formed to be very close to the pressing base 20. Therefore, the lead wire 22 is connected to the groove-like shape formed by the clamping pieces 11 and 12 and the pressing base 20. It will be in a state where it is fitted in the part.

23 and 24 are pressing pieces, which enter between the clamping pieces 11 and 12 that clamp the lead wire 22, and press and crush the lead wire 22 against the pressing base 20.

Note that the pressing pieces 23 and 24 in this example have protrusions 25 and 25 at their tips.
26 is formed, so that the crushed lead wire 22 has the shape shown in FIG. 2B.

After this, the pressing pieces 24 and 25 return to their original positions, and the holding piece lL1
2 is separated and moved to the retracted position, the processing is completed, and the holder 1 is removed.
8 and 19 are opened to allow the workpiece 21 to fall.

Next, a second embodiment of the molding machine 30 shown in FIGS. 7 to 9 will be described.

In this molding machine 30, 31 and 32 are clamping pieces,
One clamping piece 31 is provided on an arm 35 attached to the frame 33 via a vertical shaft 34 and rotates in the horizontal direction, and the other clamping piece 32 is attached to an arm 37 attached to the frame 33 via a horizontal axis 36. The clamping pieces 31 and 32 come into contact with each other at the processing position on the front surface of the press base 38 attached to the frame 33, and then separate from each other and move to the retracted position.

Reference numeral 39 denotes a holder, which is disk-shaped, and a workpiece 40 such as a resistor is fitted onto the peripheral end of the holder to hold it and rotate.

The workpiece 40 is held by a holder 39 , and after its lead wire 41 is folded back by pre-processing, the workpiece 40 is moved to the front surface of the press table 38 by rotation of the holder 39 .

After this, the clamping pieces 31 and 32 advance from the retracted position to the processing position and clamp the lead wire 41.

Reference numeral 42 denotes a pressing piece, which holds the lead wire 41 between the holding pieces 31 . 32 and presses the lead wire 41 against the suppression table 38 to crush it.

In this way, the workpiece 40 has the shape shown in FIG. 2C.

After this, the pressing piece 42 returns to its original position, the clamping pieces 31 and 32 are separated and moved to the retracted position, the machining is completed, and the holder 39 rotates to move the pressurized workpiece 40 to the next process. At the same time, the next workpiece is sent to the front of the suppression table 38.

As is clear from the above embodiments, in the present invention, the clamping piece is opened when carrying in and out of the workpiece, so that lead wire insertion errors and deformation during removal, which occur in conventional processing methods using grooves, are completely avoided. Prevented.

In addition, in the present invention, since the workpiece can be held when the workpiece is extracted, the direction of the lead wire is oriented in a fixed direction during the heating process after processing, as in the molding machine of the second embodiment. It is possible to send it with the camera facing the camera.

Furthermore, according to the present invention, when the clamping piece is worn out, it can be easily re-polished and used again, improving the maintainability of the machine.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a conventional molding method, and FIG. 2 is an explanatory diagram showing the shape of a lead wire after processing. 3 to 6 show a first embodiment of the present invention, FIG. 3 is a front view with the clamping piece in the retracted position, FIG. 4 is a front view with the clamping piece in the processing position, Figure 5 is a left side view of the same.
FIG. 6 is a plan view of the same. 7 to 9 show the second embodiment, and FIG. 7 is a front view;
FIG. 8 is a left side view, and FIG. 9 is a plan view. 10.30... Molding machine, 11, 12, 31, 3
2... Holding piece, 20, 38... Pressing base, 22.41... Lead wire, 23, 24, 4
2...Press piece.

Claims (1)

[Claims] 1. In a lead wire forming machine that folds and crushes a lead wire, two clamping pieces are provided that advance to the processing position, approach the processing position, clamp the lead wire folded back during pre-processing, and separate and move to a retracted position. A lead wire forming machine for capacitors, fixed resistors, etc., further comprising a suppressing piece that enters between adjacent clamping pieces and presses and crushes the lead wire against a press base.