JPH0553295B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention deforms the lead wires of a radial lead type electronic component such as a taped capacitor so that the electronic component can be placed at an appropriate height on a printed wiring board. The present invention relates to a method of forming a locking portion for attaching and holding the present invention to a device.

(Prior Art) As is well known, when a radial lead type capacitor is inserted into a printed wiring board, in order to fix the capacitor body at an appropriate height, a predetermined portion of the lead wire is deformed to form a locking portion. It has been traditionally done to create. General forms of this locking portion include those shown in FIGS. 7 and 8, for example. In the figure, a is the capacitor body, b is the lead wire, and c is the printed wiring board. Conventionally, before the taping process, the capacitor itself is attached to the predetermined position of the lead wire b using a jig such as a die. The so-called formed part forming the stop part d was taped. On the other hand, there are also products that are taped with straight leads, and are used as a finished product as they are without lead forming.

(Problems with the prior art) However, as the density of mounting on printed circuit boards has increased recently, the height and lead pitch of electronic components have been required to match that. There is. For example, it is often necessary to change the original lead pitch after taping as a straight lead wire. Forming was thought to be difficult because it was adhesively held with tape. Therefore, it was necessary to renew the forming taping.

(Means for solving the problem) The present invention makes it possible to process a straight lead type product into a lead forming type as needed, while continuously conveying taped products. This is to create a locking part. Therefore, it can be used with or without forming, and has excellent workability because it uses a continuous conveyance means, and the lead wires of radial lead type electronic components can be formed freely at a predetermined lead pitch in terms of design and mounting. The purpose is to provide a method that can be used.

In order to achieve the above object, the present invention, as shown in the block diagram of FIG. It is characterized in that after the protrusion is compressed substantially perpendicularly to the taping surface, the protruding portions are continuously twisted outwardly or inwardly or in the same direction using a twisting mechanism.

(Function) By configuring as described above, the lead wire of the taped electronic component is constantly conveyed without being operated intermittently, and when passing between a pair of rotating members. First, due to the uneven portion provided on the rotating member, it is projected at right angles to the conveying direction. Next, the torsion mechanism engages the protruding part of the lead wire at the same speed as the movement of the taping mount, presses the protruding part in a predetermined direction, and twists it, making it possible to form the lead wire continuously. This also improves work efficiency.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 6.

Example 1 Figures 2 to 4 show the first example,
In the figure, 1 is the capacitor body, 2 is the lead wire,
3 is a taping mount. In addition, a capacitor (film capacitor) consisting of each of these components
Since A itself has the same structure as the conventional one, and the manufacturing process is the same up to the taping process, other characteristic parts will be explained in detail here.

First, as shown in FIG. 2, a pair of rotating members 4 are arranged side by side with a predetermined interval (enough for a lead wire to pass through), that is, one rotating member 4a having a concave groove 5 on its circumferential surface; A large number of taped capacitors A are conveyed between the rotating member 4b and the other rotating member 4b, which also has a convex portion 6 on the circumferential side. In this case, since there is a gap between the groove 5 and the protrusion 4 that allows the lead wire 2 to pass through, when the lead wire 2 passes through the gap, the groove 5 and the protrusion 6
The protruding portion 7 can be formed in a direction perpendicular to the traveling direction (arrow x direction). Note that at this time, the rotating member 4
Rotate in the direction indicated by the arrow. Further, in order to allow the lead wire 2 to pass between the rotating members 4a and 4b more smoothly, it is preferable to hold the capacitor body 1. After forming such a protruding portion 7, the process proceeds to the twisting step shown in FIG. In this case, the protruding parts 7 are automatically fed one after the other to the twisting mechanism 8. This torsion mechanism 8 moves continuously in an endless track manner, and a large number of pressers 10 are attached to an endless track 9 so as to be equal to the spacing between the capacitors A attached to the taping mount 3. . These pushers 10 are fitted into a track frame 11 and have a structure that allows them to move up and down or back and forth within a predetermined range, and a lead wire 2 is attached to the tip head.
A pair of pawls 12 each having an inclined portion on the inside are provided so as to be engaged with the protruding portion 7 . By this pawl 12, as the presser 10 slides down the slope 13 and is pushed up, the protruding portion 7 slides on the inclined portion of the pawl 12 and at the same time the presser 10
is held by the entire head of the holder, whereby the protrusion 7 is twisted. At this time, a holding member 14 is provided on the opposite side of the pusher 10 with the lead wire 2 in between, and even when a predetermined pressure is applied to the lead wire 2 by the pusher 10, this holding member 14 It can be held by the handle and twisted with a predetermined strength. In addition, these many pressers 10 are always made to match the speed of the taping mount 3, and are circulating on an endless track.

Example 2 In the first example above, a case was explained in which the twisting direction of the lead wire 2 is directed inward.
In the second embodiment, a case will be described in which it is directed outward. In this case, the method of forming the protruding portion 7 is the same as in the first embodiment. The difference lies in the structure of the tip head of the presser 10 in the continuously moving twisting mechanism 8. That is, as shown in FIG. 5, the chevron-shaped claws 15 inserted between the protruding parts 7 of the lead wire 2 push out both protruding parts 7 at the same time, and then the flat part of the tip head is used to spread the protruding parts 7 simultaneously. When pressed, the protruding portion 7 can be turned completely outward. In this case as well, as in the first embodiment, the locking portion can be engaged with and separated from the lead wire 2 while circulating on the endless track, thereby continuously forming a locking portion.

Example 3 Recently, as packaging density increases, wiring space and
If the locking portions are turned inward or outward, there is a risk that the lead wires will come into contact with each other, so it may be very effective to orient the locking portions in the same direction. FIG. 6 shows a method for forming the protruding portion 7. In this case as well, the protruding portion 7 is formed in the same manner as in each of the above embodiments, but when twisting, the protruding portion 7 is simply formed by using the roller 16. Can be twisted in the same direction. That is, the protruding portion 7 of the lead wire 2 protruding perpendicularly to the advancing direction of the taping mount 3 is twisted in one direction while being pressed as the roller 16 rotates. The locking portion can be formed by such means.

In the above embodiment, the presser 10 was changed depending on the direction of the locking part, but if the shape of the claw etc. is made variable so that switching can be performed, the presser 10 does not have to be changed each time. The direction of the locking part 10 can correspond to inside or outside or the same direction. Further, it is also possible to use something other than the endless track 9 or roller 16 of each embodiment, and for example, by providing a claw or the like on the circumferential surface of the rotating body, it may be used in place of the presser. Furthermore, although the above embodiments have been described with respect to capacitors, the present invention is not limited to this and can also be applied to radial lead type general electronic components.

(Effects of the Present Invention) As described above, the present invention has the advantage that the protruding portions formed by compressing the two lead wires of a large number of radial straight lead electronic components fixed to a taping mount with a rotating member are moved outward. Alternatively, since the locking portion is formed by freely and continuously twisting inward or in the same direction, lead forming suitable for high-density packaging can be achieved in terms of design. The present invention
Straight lead parts can be used as taped parts after taping, or by forming them continuously to create locking parts, you can freely select the lead pitch and support high-density packaging. This is a useful technology that has made this possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing the configuration of the present invention, FIG. 2 is a perspective view showing a method of forming a protrusion on a lead wire according to each embodiment of the present invention, and FIG.
A plan view showing the twisting method of the embodiment, Figure 4 is the same as Figure 1.
FIG. 5 is an enlarged perspective view of the presser of the embodiment.
FIG. 6 is a plan view showing the twisting method of the third embodiment, and FIGS. 7 and 8 show a locking portion formed by a conventional method and attached to a printed wiring board. FIG. 3 is a side view of the electronic component shown in a mounted state. In the figure, 1 is the capacitor body, 2 is a lead wire, 3 is a taping mount, 4 is a rotating member, 5 is a groove, 6 is a convex part, 7 is a protruding part, 8 is a twisting mechanism, 9
is an endless track, 10 is a pusher, 11 is an endless track frame,
12 is a claw, 13 is a tilting table, 14 is a holding member, 15
16 is a claw, and 16 is a roller.

Claims (1)

[Scope of Claims] 1. In a taped product of a large number of radial type straight lead electronic components, each two lead wires are sequentially partially clamped between a pair of rotating members so that they protrude approximately at right angles to the taping surface. A method for making a locking part in a lead wire of a radial lead type electronic component, characterized in that the respective protruding parts are then continuously twisted outwardly or inwardly or in the same direction with respect to each other using a twisting mechanism. 2. The lead wire of the radial lead type electronic component according to claim 1, wherein a concave groove is provided on the circumferential surface of one rotating member, and a convex portion is provided on the circumferential surface of the other rotating member. How to make a locking part. 3. The torsion mechanism includes a number of pressers that circulate and press the protruding portion of the lead wire approximately 90 degrees in a predetermined direction while moving on an endless track at the same speed as the radial lead type electronic component being transported. A method for making a locking portion in a lead wire of a radial lead type electronic component according to claim 1, comprising: