JPS594471Y2 - Lead terminal bending equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an apparatus for bending lead terminals led out from an electronic component main body, particularly lead terminals formed by press punching from a thin plate.

2. Description of the Related Art In electronic components such as connectors from which lead terminals can be led out, the lead terminals led out from a housing made of an insulating material are of an angular type that are bent in a predetermined manner.

Fig. 1 is an external view of the angular type multi-connector 1, in which figure b is a view taken in the direction of arrow A in figure a, and figure 0 is a view taken in the direction of arrow A in figure a.
An arrow view is shown.

Such lead terminals 2 include those having a round or square cross section formed from a wire material, and those having a square cross section formed from a plate material.

A lead terminal having a rectangular cross section formed from a plate material is usually obtained from a hoop material by pressing means.

Therefore, as is well known, its cross-sectional shape is
It has a shape as shown in the figure.

That is, a sloping surface 4 is formed around the front surface 3, and a sagging surface 4 is formed on the periphery of the front surface 3.
A burr 6 occurs around the periphery.

A part of the lead terminal is supported from below by a die, and when the part of the lead terminal protruding from the die is bent by a descending punch, the bending process is performed accurately.
In addition, in order to extend the life of the punch, the surface 5 is in contact with the punch.

On the other hand, if the gap between the cutting dies is uniform, the amount of the sag 4 will be equal all around the circumference, but if the gap is set to one side, the amount of the sag 4 will be different on the left and right sides when viewed in cross section.

FIG. 3 is a diagram illustrating the occurrence of fluttering bends in the lead terminals that occur when the lead terminals formed so as to be lopsided are attached to a housing and bent using a conventional method.

However, in the figure, 7 is a lead terminal with a large sag on the left shoulder in cross-sectional view, 8 is a housing with a plurality of lead terminals 7 attached, and 9
10 indicates a bending die, and 10 indicates a bending punch that moves up and down.

In FIG. 3, a front view a-1 and a side view a-2 thereof show that the housing 8 is fixed such that the upper surface of the die 9 is in contact with a predetermined portion of the lower surface of the lead terminal 7, and the lower surface of the punch 10 that has descended is It is in a state in which it is in contact with the upper surface of the lead terminal 7 in a predetermined manner.

As shown in the front view b-1 and side view b-2, the continued descent of the punch 10 causes the die side corner 10a of the punch 10 to rub against the lead terminal surface 7a, and the lead terminal 7
fold.

At this time, the lead terminal 7 is slightly twisted and bent so that the punch corner 10a is brought into contact with the large sag 7b on the surface 7a.

As a result, the lead terminal 7 that has been bent has a so-called fluttering bend that is inclined toward the droop 7b side, as shown in the front view C-1 and the side view C-2.

In an electronic component that has undergone such a fluttering bend, the relative dimensional relationship between the main body and the tip of the lead terminal is disrupted, making it difficult to mount it as is on a printed wiring board, etc., and the lead terminal A correction process was required.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and the purpose is to separate the workpiece stand on which the electronic component main body is placed and the retainer that fixes the main body part to the workpiece stand on the punch side and the die side, respectively. The present invention is a distant relative of the present invention by providing a lead terminal bending device which is divided into two sides, swingably supported, and each provided with means for fastening at an arbitrary swing angle.

The present invention will be explained below using the drawings.

FIG. 4 shows the main parts of a lead terminal bending device according to an embodiment of the present invention, in which a shows a front view and b shows a side view.

In FIG. 4, the lead terminal bending device 15 includes a movable part mounted on a pair of guide shafts 17 that stand upright on the left and right sides on a base plate 16, a fixed part mounted on the plywood 16, and the movable part. It is comprised of a normal drive mechanism (not shown) that moves the workpiece up and down in a predetermined manner, and a normal means (not shown) that supplies and delivers the workpiece in a predetermined manner.

The movable portion includes a pair of sleeves 18 which are fitted onto the pair of guide shafts 17 and are slidable, and a pair of sleeves 18.
A movable plate 19 whose upper end is fixed, and a movable plate 19 whose upper end is fixed.
A punch 20 is fixed to and hangs down, an arm 21 is pivotally supported at the center and is swingably attached to a movable plate 19, and a pair of left and right coil springs 22 are used to connect the arm 21 to the movable plate 19.
The arm 21 is composed of a retaining metal fitting 23 suspended from the arm 21 and a pair of screws 24 that fasten the arm 21 in a predetermined position.

On the other hand, the fixing part is a support base 24 attached to the plywood 16.
, a workpiece stand 25 which is rotatably mounted on the support stand 24 with its central portion being pivoted, a die 26 which is mounted on the workpiece stand 25 with the upper part protruding in a predetermined manner, and a workpiece stand. It is composed of a pair of screws 27 that fasten the screws 25 in a predetermined manner.

In the lead terminal bending apparatus having such a structure, when bending an electronic component, for example, a lead terminal 30 led out from the housing 29 of the connector 28, the lead terminal 30 of the connector 28 placed on its side is bent. A workpiece table 25 having a die 26 mounted so that its lower surface and a predetermined upper surface are in contact with each other, and a retainer 23 that is attached to the movable plate 19 and hanging down from the lower surface of the punch 20 are connected to the lead terminal 30.
The pair of screws 24 and 27 are tilted at a required angle toward the side with smaller surface droop to accommodate uneven surface droop.
is adjusted and fixed.

Thereafter, when the drive mechanism is operated, the movable plate 19, which is equipped with a protrusion 32 on its upper surface that engages with the structural member 31 of the drive mechanism that repeatedly moves up and down, descends by a predetermined amount, and the tip of the punch 20 touches the lead terminal 30. Press and bend it, then rise and return to the original position.

It should be noted that, as a matter of course, the non-uniformity of the surface sag is due to the setting of the cutting die for the node terminal, so the inclination angle adjustment of the overlying film stage 25 and the holding fitting 23 should be carried out for each lot in the unit of the cutting die setting. good.

As described above, the lead terminal bending device according to the present invention has the practical effect of eliminating fluttering bends in the lead terminals, eliminating the need for a correction process, and contributing to the automation of electronic component mounting.

[Brief explanation of the drawing]

Figure 1 is an external view of the angular type multi-connector.
Fig. 2 shows the shape of the pressed cross section, Fig. 3 is an explanatory diagram of occurrence of fluttering bending of the lead terminal, and Fig. 4 shows a front view a and a side view b0 2 of a lead terminal bending device according to an embodiment of the present invention. .7.30...Lead terminal, 20...
・Punch, 23... Holder fitting, 25...
- Loading table, 26... Dice, 28...
Connector, 29...Housing.

Claims (1)

[Scope of utility model registration request] In an apparatus for bending a lead terminal led out from an electronic component main body using a punch and a die, a mounting table on which the main body is fixed and a holding metal fitting for fixing the main body to the mounting table are respectively on the punch side. 1. A lead terminal bending device comprising: a die side and a die side, which are swingably supported, and each is provided with a means for fastening at an arbitrary swing angle.