JPH0447964Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lead bending device for DIP type electronic component leads.

[Conventional technology]

Recently, the assembly process of integrated circuits has been rapidly automated, and in the process of processing component terminals, manual machines such as crank presses have been rapidly replaced by automatic machines such as cut benders and roller bending dies. In addition, the lead bending structure for electronic components is changing from the iron bending method to the roller bending method due to problems such as adhesion of resin scum and damage to the package.

Fig. 2 shows the basic structure of a conventional roller bending mechanism, in which 1 is a stripper plate that holds the electronic component 3 together with a bending die 2A, and 4 is a stripper plate that presses down on the stripper plate 1 to float the electronic component 3. 5 is a bending roller that presses the lead 6 of the electronic component 3 against the bending die 2A to bend it; 7 is the roller 5;
It is a holder. In the above-described apparatus, the lead 6 can be bent at right angles along the bending die 2A by moving the bending roller 5 from the solid line position as shown in the imaginary line.

[Problem that the invention attempts to solve]

However, in the apparatus configured as described above, if the diameter of the bending roller 5 is too small, for example, the bending roller 5 will be deformed or broken by the lead 6, so it is necessary to increase the diameter of the roller. However, the roller diameter is bent by die 2A.
If the radius is increased to a predetermined distance or more from the side surface of the lead 6 to the narrow part of the lead 6, the third
As shown in Figures a and b, the thin part of the lead 6 hits the bending roller 5 first and is bent, so the lead 6 is bent into a dogleg shape as shown in Figure 4. In other words, the lead 6 is once extended into a straight line, but due to the spring back action of the lead 6, it returns to the "dog" shape again. As a result, the lead 6 was bent into a dogleg shape, making it impossible to obtain a predetermined length.

The purpose of the present invention is to provide a lead bending device that can eliminate the problem of not being able to obtain a predetermined size due to the dogleg-shaped bending of the lead, and provide a lead bending device that can obtain a lead of a predetermined size for an electronic component. shall be.

[Means for solving problems]

In the lead bending device of the present invention, an electronic component having a lead having a narrow tip end is supported by a support means, and the distance from the side surface of the support means to the narrow portion of the lead is at least a predetermined distance. When the lead is bent almost parallel to the side surface of the support means by a bending roller means having a radius of The lead is configured to protrude from a side surface portion opposite to a portion separated by the predetermined distance from the side surface of the lead.

[Effect]

The lead bending device according to the present invention has a protruding abutting portion on the side surface of the support means, so that the lead can be reversely warped by the bending roller means.
The "dog"-shaped bend caused by springback is eliminated, thereby making it possible to obtain a lead of a predetermined size.

〔Example〕

FIG. 1 shows a lead bending device showing an embodiment of this invention. In the figure, 1 has a stripper plate, 2 has a side surface for bending the leads, and together with the stripper plate 1, the tip portion 4 is a bending die which clamps the electronic component 3 having a narrow lead 6 and causes the lead 6 to extend outward from the side surface for a desired length; It is a spring that prevents 5 has a radius greater than a predetermined distance from the side surface of the bending die 2 to the narrow part of the lead 6, and the lead 6 of the electronic component 3 is pressed against the side surface of the bending die 2 so as to be substantially parallel to the side surface. A bending roller 7 is a holder for the bending roller 5. 8
is a stepped portion formed on the side surface of the bending die 2 and having a contact portion 8a at the bottom against which the tip end 6a of the bent lead 6 comes into contact; A contact portion 8a protrudes from the side surface of the upper portion opposite to the upper portion.

Next, the operation of this embodiment will be explained with reference to FIG. The electronic component 3 is held between the stripper plate 1 and the bending die 2 at the base of the lead 6, and is in the state shown by the two-dot chain line in FIG. next,
When the bending process of the lead 6 is started by the downward movement of the bending roller 5, the narrow part (tip part) of the lead 6 is bent first, and then the root part is bent, and the lead 6 is temporarily bent. After that, as shown by the solid line in FIG. 1, the lead 6 is bent into a reverse warp state by the step part 8 provided on the bending die 2, with the tip end 6a abutting the contact part 8a and using this as a fulcrum. forced to bend. As a result, the spring back of the lead 6, which is bent into a dogleg shape, is eliminated, and the lead has a predetermined dimension, that is, a straight lead.

The electronic component 3 can be widely used not only as a molded integrated component but also as a small reed relay or a ceramic DIP integrated component.

[Effect of idea]

As explained above, according to the present invention, a protruding abutment part is provided on the side surface of the support means, and the tip of the bent lead comes into contact with the protruding abutment part, and the lead is bent backward toward the outside of the support means using this abutment part as a fulcrum. Since the lead is bent and corrected, spring back can be prevented when the lead is bent, and a straight lead of a predetermined size can be produced with high yield.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a lead bending device showing an embodiment of the present invention, Fig. 2 is a block diagram of a conventional lead bending device, Fig. 3 is a diagram showing electronic components and leads, and Fig. 4 shows that the leads are FIG. 2 is a side view of a conventional electronic component bent in a dogleg shape. 2...Bending die (supporting means), 3...Electronic component,
5... Bending roller (bending roller means), 6... Lead, 6a... Tip, 8... Step portion, 8a... Contact portion.

Claims (1)

[Claims for Utility Model Registration] In a lead bending device, the tip part supports an electronic component having a narrow lead, and the support means has a side surface, and the support means has a side surface for extending the lead a desired length outward from the side surface. a support means that is disposed relative to a side surface of the support means;
bending roller means for bending the extended lead in a direction substantially parallel to the side surface; The support means has an abutment portion on which the tip of the bent lead abuts the side surface and protrudes from a side surface portion opposite to a portion of the bent lead that is separated from the side surface by the predetermined distance. A lead bending device, characterized in that the bending roller means straightens the lead extending on the side surface part using the abutment part of the support means as a fulcrum.