JPH0651038Y2 - Axial lead type pusher for electronic component insertion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an axial lead type electronic component, for example,
This is a pusher for inserting an axial lead type electronic component used when pushing a diode, a resistor, a capacitor, etc., which has lead wires out from both ends in the axial direction of the tubular electronic component body, into a through hole of a printed wiring board. is there.

[Conventional technology]

In recent years, electronic components have become smaller, and it has become difficult to accurately insert the lead wire of the axial lead type electronic component into a through hole of a printed wiring board by an automatic insertion machine. For example, FIG. 3 shows an example of inserting a lead wire of an axial lead type electronic component in a conventional example into a through hole of a printed wiring board.

In FIG. 3, the axial lead type electronic component 10 is
For example, in an electronic component having a metal cap 12 such as a diode, a resistor, or a capacitor, the lead wire 11 has a metal cap.
Connected to 12. Normally, the axial lead type electronic component is entirely coated from above the metal cap 12 with an insulating coating, so that it has an outer shape as shown in FIG.

Most of the metal caps 12 are made of iron and solder-plated thereon, and the lead wires 11 are made of soft copper.

A case where such an axial lead type electronic component 10 is inserted into the through hole 17 of the printed wiring board 16 will be described with reference to FIGS.

FIG. 3 (a) shows that before the insertion head is activated, the pusher 13 does not operate, and the space between the pusher 13 and the receiving lever 14 is
The axial lead type electronic component 10 is not inserted.
The axial lead type electronic component 10 is cut from a carrier tape (not shown) by a spring force or air pressure, and is located between the pusher 13 and the receiving lever 14 as shown in FIG. It is held by the elastic body 15 and the force of a spring (not shown). Thereafter, a cutter and a lead wire forming machine (not shown) bend the lead wire 11 of the axial lead type electronic component 10 as shown in the drawing and cut it into a predetermined length. For details of the above process, see, for example, Japanese Patent Publication No. 49-4700 and Japanese Patent Publication No.
It is publicly known in JP-A-9-7708, JP-B-49-7936 and JP-A-1-146396.

Next, as shown in FIG. 3C, the receiving lever 14 rotates in a direction away from the axial lead type electronic component 10,
The axial lead type electronic component 10 is pushed out by the pusher 13 against the force of the spring.

The lead wire 11 of the pushed axial lead type electronic component 10 starts to be inserted into the through hole 17 of the printed wiring board 16. When the receiving lever 14 rotates and escapes completely as shown in FIG. 3 (d), the axial lead type electronic component 10
Falls by its own weight toward the through hole 17 of the printed wiring board 16.

After the lead wire 11 of the axial lead type electronic component 10 is inserted into the through hole 17, as shown in FIG.
The downward movement of the pusher 13 is mechanically axial.
The lead type electronic component 10 is pushed into the printed wiring board 16. Then, the lead wire 11 protruding from the through hole 17 of the printed wiring board 16 is bent by a device (not shown), and the portion is soldered.

However, when the axial lead type electronic component 10 is made of glass or ceramic, etc., when the speed of the automatic insertion machine is increased, the axial force is applied due to the pressing force of the pusher 13.
The lead-type electronic component 10 may be damaged.

Another conventional example considered to prevent such accidental damage of the axial lead type electronic component will be described with reference to FIG.

In FIG. 4, an elastic body storage hole 22 is provided in the lower portion of the pusher 13, and an elastic body 25 is inserted in the elastic body storage hole 22.
Is stored. A part of the elastic body 25 projects from the elastic body accommodation hole 22. Further, similarly to the pusher 13, an elastic body storage hole 26 is also provided in the receiving lever 14 that receives the axial lead type electronic component 10, and the elastic body 28 partially projects into the elastic body storage hole 26. It is stored.

Pusher guide 29 is an axial lead type electronic component.
As shown in FIG. 3B, a guide groove 30 for guiding the lead wire 11 of the axial lead type electronic component 10 is provided as a guide for cutting and homing.

When the elastic body (urethane rubber) 25 is formed in the elastic body storage hole 22 of the pusher 13, the melted elastic body 25 is poured,
After cooling and hardening, the elastic body 25 protruding from the elastic body storage hole 22 is cut while leaving a necessary portion.

[Problems to be solved by the device]

However, the elastic body 25 in the conventional example shown in FIG. 4 is worn out during use. When the axial lead type electronic component 10 is pressed by the worn elastic body 25, the pusher
Axial to be mounted on 13 metal parts and printed wiring board 16
The lead-type electronic component 10 comes into contact with it. For this reason,
The axial lead type electronic component 10 pressed by the metal part of the pusher 13 may be damaged.

Further, if the wear of the elastic body 25 is not uniform, the axial lead type electronic component 10 cannot be mounted on the printed wiring board 16 in a correct posture, which causes mounting failure.

Therefore, after performing a certain number of pressing operations, the pusher 13
It is necessary to remove the elastic body 25 stored in the elastic body storage hole 22 from the elastic body storage hole 22 and replace it with a new elastic body 25.

But the pusher built into the complex machine
From the elastic body accommodation hole 22 provided at the bottom of 13 to the elastic body 25
The work of picking out the fish took skill and time. Moreover, the elastic body 25 remains in the storage hole top 23 without being completely removed. If the old elastic body 25 is left in the elastic body storage hole 22, the old elastic body 25 left behind interferes when the new elastic body 25 is poured, forming an air hole or an air layer between them. To do. The new elastic body 25 has a problem that the old elastic body 25 and the air holes or air layers do not uniformly enter the elastic body accommodation holes 22.

The drawbacks in the case where the elastic body 25 does not enter the elastic body storage hole 22 uniformly are as follows. That is, (1) In the elastic body housing hole 22, there are a new elastic body 25 portion having a high elasticity and an old elastic body portion 25 having deteriorated elasticity, so that the strength of the entire elastic body 25 decreases. .

(2) Since there is an air hole or an air layer between the new elastic body 25 and the remaining old elastic body 25, the elastic body 25 is drawn into the one where much air is present due to aging. It becomes easier to get caught and one wears more.

(3) Since the elastic body accommodating hole 22 has an air hole or an air layer, the elastic body 25 is oxidized by this air to accelerate deterioration.

(4) Insert the new elastic body 25 into the elastic body storage hole 22 at the correct angle.
Axial lead type electronic components 10
When pressing, bend and press. Therefore, the axial lead type electronic component 10 may not be properly attached to the printed wiring board.

It is also possible to replace the pusher 13 without replacing the elastic body 25, but the pusher 13 is a cutter unit that cuts the lead wire 11 as shown in the schematic view of FIG. Clincher that bends the lead wire 11,
Alternatively, the receiving lever 14 and the like are complicatedly assembled. Therefore, only the pusher 13 cannot be disassembled and taken out, and the replacement time becomes long.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an axial lead type electronic component pusher in which an elastic body can be easily attached to or replaced in an elastic body storage hole of the pusher in order to solve the above problems.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the pusher for inserting the axial lead type electronic component of the present invention is provided with an elastic body accommodating member provided under the pusher for pushing the axial lead type electronic component into the through hole of the printed wiring board. A hole, and an opening formed at a position on at least one side surface of the elastic body accommodation hole that contacts the top of the accommodation hole, and one end contacts the top of the accommodation hole and is accommodated in the elastic body accommodation hole. At the same time, the other end is made up of an elastic body which projects from the elastic body accommodation hole and presses the axial lead type electronic component.

Further, the opening portion of the pusher for inserting an axial lead type electronic component is characterized in that it is a long hole whose major axis faces downward.

Further, the opening portion in the pusher for inserting the electronic component of the axial lead type is a slit formed downward.

[Action]

According to the present invention, an elastic body is formed in a predetermined shape and stored in an elastic body storage hole, and an opening for taking out the elastic body is provided at a position on at least one side surface of the elastic body storage hole, which is in contact with the top of the storage hole. Since the portion is drilled, the following effects are obtained. That is, (1) the opening formed at a position in contact with the top of the elastic body storage hole completely removes the old elastic body and completely replaces the new elastic body formed uniformly in advance.
Then, the replaced new elastic body eliminates the problem of strength reduction due to the non-uniform shape.

(2) The old elastic body stored in the elastic body storage hole facilitates complete removal and also has a new elastic body with one end protruding from the opening in order to eliminate the space for air to enter the elastic body storage hole. Only one side of the body is not worn.

(3) Since the old elastic body stored in the elastic body storage hole is completely removed and there is no air hole or air layer in the elastic body storage hole, the new elastic body does not come into contact with air and oxidize.

(4) The old elastic body accommodated in the elastic body accommodation hole uses the elastic body extraction opening formed at a position on at least one side surface of the elastic body accommodation hole, which is in contact with the top of the accommodation hole. Because it can be easily replaced, the time required for replacement can be greatly speeded up compared to before. In addition, the replacement of a new elastic body can be easily performed by a person who is not used to it, by using the opening formed at the position in contact with the top of the storage hole.

(5) Since the new elastic body accommodated in the elastic body accommodating hole can be replaced easily and easily, it is possible to project an appropriate thickness from the elastic body accommodating hole without damaging the parts and absorbing shock.

(6) The shape of the opening is a long hole whose major axis faces downward,
Alternatively, by using a slit formed downward, the elastic body can be replaced more easily and quickly.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 (a) to (c) and FIGS. 2 (a) to (c). 1 is a pusher front view of the present invention, (a) is a pusher front view, (b) is an elastic body front view, (c) is an elastic body side view, and FIG. 2 is another pusher explanatory view of the present invention. Here, (A) is a pusher front view, (B) is an elastic body front view, and (C) is an elastic body side view.

In the figure, the pusher 1 is provided with an elastic body accommodation hole 2 in the lower part thereof. An opening 4 is formed in at least one side surface of the elastic body storage hole 2 from the storage hole top portion 3 downward. The elastic body 5 is a member having elasticity such as a rubber resin such as urethane rubber or polystyrene, and corresponds to the shape of the elastic body accommodation hole 2. If the hardness of the material of the elastic body is increased in order to prevent abrasion, the axial lead type electronic component 10 may be damaged when the axial lead type electronic component 10 is pressed. Therefore, the elastic body 5 with various hardnesses (Rockwell hardness) was used for the pusher 1 of the automatic electronic component mounting machine (Panasert AE type (trademark) of Matsushita Seiki Co., Ltd.) to obtain 500,000 axial lead type electronic components. An experiment was carried out to attach it to a printed wiring board. As a result, the elastic body 5 having a hardness of 80 to 90 degrees (Rockwell hardness) did not fall out from the elastic body storage hole 2, and there was no accidental damage to the axial lead type electronic component 10.

In another embodiment, as shown in FIGS. 2A to 2C, the accommodating hole top portion 3 is provided on at least one side surface of the elastic body accommodating hole 2.
The slit 6 is opened from to the lower end. Elastic body 7
Is tapered toward the tip, and the elastic body housing hole 2 also corresponds to the shape of the elastic body 7.

As a result of conducting the same experiment as described above using the elastic body 7 having the above-mentioned shape and the hardness of 80 to 90 degrees (Rockwell hardness) similar to that of the above-mentioned embodiment, 1 million axial lead type electronic components were printed on a printed wiring board. Even when attached, the elastic body 7 did not fall out from the elastic body storage hole 2, and there was no accidental damage to the axial lead type electronic component 10.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. Various design changes can be made without departing from the present invention described in the claims for utility model registration.

For example, the shape of the elastic body can be arbitrarily changed to a truncated pyramid, a truncated cone, a prism, a cylinder, or the like other than that described in the embodiments.

Needless to say, the opening provided in the elastic body accommodation hole is provided not only in the pusher but also in the receiving lever.

[Effect of device]

According to the present invention, the opening formed at the position contacting the top of the storage hole completely removes the old elastic body and completely replaces the new elastic body formed in advance. The mold electronic parts can be pressed evenly.

According to the present invention, since air does not enter between the elastic body accommodation hole and the elastic body, the elastic body cannot be attached unevenly, so that the axial lead type electronic component can be pressed uniformly.

According to the present invention, since the elastic body does not come into contact with air and oxidize, the deterioration becomes uniform, and by exchanging the elastic body for a predetermined period, the axial lead type electronic component can always be pressed accurately.

According to the present invention, at least one side surface of the elastic body storage hole is provided with an elastic body taking-out opening formed at a position in contact with the top of the storage hole, so that the time required for exchanging the elastic body can be reduced as compared with that in the past. It is very fast and can be easily replaced even by unfamiliar people.

According to the present invention, the elastic body accommodated in the elastic body accommodating hole can be made to have an appropriate thickness capable of absorbing a shock without damaging the component, so that a desired pressing force can be applied to the axial lead type electronic component. Can be given.

According to the present invention, since the opening is a long hole whose major axis faces downward, or a slit formed downward, the elastic body can be replaced more easily and quickly.

[Brief description of drawings]

1 is a pusher front view of the present invention, (a) is a pusher front view, (b) is an elastic body front view, (c) is an elastic body side view, and FIG. 2 is another pusher explanatory view of the present invention. Here, (a) is a pusher front view, (b) is an elastic body front view, (c) is an elastic body side view, and FIG. 3 is a conventional example explanatory view,
FIG. 4 is an explanatory view of another conventional example. 1 ... Pusher 2 ... Elastic body storage hole 3 ... Storage hole top 4 ... Opening 5 ... Elastic body 6 ... Slit 7 ... Elastic body

Claims (3)

[Scope of utility model registration request] 1. A pusher for inserting an axial lead type electronic component into a through hole of a printed wiring board, in which an axial lead type electronic component inserting pusher that can be moved up and down is provided with an elastic body accommodation hole provided below the pusher 1. 2 and at least one side surface of the elastic body storage hole 2 at a position in contact with the storage hole top portion 3, the openings 4 and 6 formed therein.
An elastic body 5 having one end in contact with the storage hole top portion 3 and stored in the elastic body storage hole 2, and the other end protruding from the elastic body storage hole 2 to press the axial lead type electronic component;
A pusher for insertion of an axial lead type electronic component, characterized in that 2. The pusher for inserting an axial lead type electronic component according to claim 1, wherein the opening 4 is a long hole having a long axis directed downward. 3. The pusher for inserting an axial lead type electronic component according to claim 1, wherein the opening 4 is a slit formed downward.