JPH0158680B2 - - Google Patents

Description

[Detailed Description of the Invention] When assembling circuit components such as fixed resistors and capacitors with lead wire terminals (P type) on a printed wiring board, the present invention is designed to align the lead wire terminals with the hole spacing at the assembly position. This relates to a jig used for bending into a lever shape.

When mass producing one type of circuit unit,
Since it is necessary to prepare in advance a large amount of lead wire terminals for each circuit component bent to fit the hole spacing of each assembly position, an automatic bending machine set to a different bending width or a folding It is molded and supplied using an automatic bending machine with adjustable bending width.

However, in the case of prototyping or small-to-medium-volume production of many models, such as in a cottage industry, it is better to prepare in advance a large number of circuit parts with various bending widths with bent lead wire terminals, as in the case of mass production mentioned above. Since excess leads may be wasted, it is common practice to bend the lead wire terminals of the required number of circuit components each time they are assembled.

In that case, since it is troublesome to bend the lead wire terminal for each circuit component, a rootstock with a width that matches the bending width of the lead wire terminal is used, and several circuit components are placed on it. , the protruding parts of the lead wire terminal on both sides of the basestock are bent to follow the outer surface of the basestock. However, rootstocks of various dimensions and widths are required. It is also possible to make do with a single rootstock by tapering the width of the rootstock, but in either case, the position of the main body of the circuit component on the rootstock is unstable, making it difficult to fold the lead wire terminal. The bending position may be asymmetrical.

An object of the present invention is to provide a bending jig that solves the above-mentioned problems in bending lead wire terminals of circuit components with lead wire terminals.

To explain the structure and function of the embodiment shown in the drawings, as shown in FIGS. 1 and 2, a reference plate 2 of a constant thickness is integrally protruded from one end of a grip portion 1 that can be gripped with one hand. On both sides of the reference plate 2, the same number of thin plates 3 for setting the lead wire bending width and body receiving groove width are stacked, and a common shaft passes through the thin plates 3 and the reference plate 2 at the end near the grip part 1. 4, the thin plate 3 is rotatably attached to the reference plate 2. A fixing member 5 is provided at the tip of the reference plate 2 for positioning the thin plate 3 by engaging and disengaging it from the thin plate 3 parallel to the reference plate 2.

The fixing member 5 of the embodiment is a common hook that engages and disengages from a notch 6 formed at the lower edge of the tip of each thin plate 3, and is always urged in the locking direction by a leaf spring 7. Instead of the hook-shaped fixing member 5, a bolt or nut may be used.

The reference plate 2 determines the minimum width of the groove into which the main body P of the circuit component with lead wire terminals is laid horizontally, and also serves as the bottom of the groove, which is the length of the main body of the smallest fixed resistor currently available. is approximately 3.5mm, so
The reference plate 2 has a thickness of 3.5 mm.

The thin plates 3 that overlap on both sides of the reference plate 2 have a thickness that is determined by taking into account the length of the main body P of various standardized circuit components and the bending width of the lead wire terminal determined by the hole spacing of the printed wiring board. It is suitable to use a 1mm plate.

The thin plates 3 are formed to have the same shape and size, and shallow cutouts 8A, 8B, and 8C are provided on the upper edge of the plate 3 for positioning the lead wire terminals 1 placed on the upper edge.
For example, the notch 8A can hold 5 circuit components with a diameter of approximately 2.5 mm.
The notch 8B has 5 circuit parts with a diameter of approximately 3.5 mm.
The notch 8C has a thicker circuit component of approximately 4 mm in diameter.
Set the length so that each piece can be received side by side.

Further, the thin plates 3 may have different colors between adjacent plates, and the order of the colors may be arranged symmetrically with respect to the reference plate 2. In this case, if a color code of the fixed resistor is used for the color of each thin plate, there is an advantage that the color indicates the approximate dimensions of the bending width of the lead wire terminal and the width of the main body receiving groove.

As shown in FIG. 1, when all the thin plates 3 are aligned on both sides of the reference plate 2 (the hooks 5 are engaged with the notches 6 of all the thin plates 3), the tip of the row of thin plates 3 is , next to a pair of holes H1 and H2 on the printed wiring board B (second figure) where the circuit components are to be assembled,
Thin plates 31 and 32 of the same color are holes H1 and H2, respectively.
The outer thin plate groups 3L and 3R, including the thin plates 31 and 32, are disengaged from the hook 5 and pulled up as shown in FIG. let

Next, of the thin plates 3 remaining on both sides of the reference plate 2,
In order to form a groove above the reference plate 2 in which the outermost parts 33 and 34 (same color) and the main body P of the circuit component to be assembled are inserted horizontally, a thin plate 35, which is on the outside of the length of the main body P, 36 (same color) and the third
Once raised as shown in the figure, it is then pushed down until the stepped portions 9 of each of the thin plates 33, 34, 35, and 36 that are continuous with the hook engaging notches 6 touch the hooks 5, as shown in FIG. The upper edges of the thin plates 33, 34, 35, and 36 are higher than the other thin plates 3 that are positioned and fixed to the reference plate 2 by engagement with the hooks 5.

As described above, a main body receiving groove is formed on the side of the reference plate 2, with the reference plate 2 serving as a part of the bottom and the groove width set by the pair of inner thin plates 35 and 36, as shown in FIG. C is formed, and a pair of outer thin plates 33,
34 sets the bending width of the lead wire terminal l.

Two pairs of inner and outer thin plates 3 set as above
3, 34, 35, 36, and the main body P is placed in the groove C. Arrange several circuit components at the corresponding notch 8B, and then Hold the main body P from above with the pad of the thumb F of the hand that is gripping the grip part 1 together with the unnecessary thin plate groups 3L and 3R, and with the two fingers of the other hand,
Forces f1 and f2 are applied downward to the parts of the lead wire terminal l that protrude outward from the outer thin plates 33 and 34, and the lead wire terminal l is connected as shown by the chain line l' in FIG. It is bent into a U-shape following the outer surfaces of the outer thin plates 33 and 34.

Figure 7 shows the bending process when the width of the main body receiving groove C is increased in order to process a circuit component with a long length of the main body P, and the bending width of the lead wire terminal l is increased because the assembly hole spacing is also wide. It shows the condition.

In the above embodiment, the upper edge of the required thin plate is set higher than the other thin plates in order to determine the main body receiving groove width and the lead wire bending width, but the embodiment shown in FIG. Thin plate 33, 3 that determines the line bending width
The point that the unnecessary thin plate groups 3L and 3R on the outside of 4 are reversed to both sides of the grip part 1 is the same as in the previous embodiment, but the thin plates that determine the body receiving groove width and the lead wire bending width do not need to be moved. It has been constructed in a good manner.

In the embodiment described above, the thin plates 3 had exactly the same shape and size, but in the case of the example shown in FIG. 8, the depths of the notches at the upper edges of the inner several thin plates are made different.

The notch 8A in the position where the smallest circuit component of the main body P is placed is extremely shallow enough to hold the lead wire terminal l of all the thin plates, and as shown in FIG. The main body P fits into the groove C.

The cutout portion 8B at the position where the main body P places an intermediate-sized circuit component is formed by two inner thin plates 37, 37.
The notches 8B1 of 1, 38, and 381 are deeper, and the main body P is positioned in the groove C between the third thin plate 372 and 382 from the inside as shown in FIG.

The notches 8C in the positions where the main body P places large circuit components are shown in FIG. As shown, insert the main body P into the groove C between the fourth thin plate 373 and 383 from the inside.
is fitted and positioned. Above deep notch 8B
1 and 8C1, the bottom surface of the outer one is formed into a slope that slopes low inward, thereby stabilizing the main body in the groove.

In short, in the innermost thin plates 37, 38 and the next thin plates 371, 381, two of the three notches 8B1, 8C1 are deep, and the third thin plate 372, 382 from the next inner side is 1 Notch part 8
Only C1 is deeper.

In the figure, 1A is a pedestal formed along the lower edges of the grip portion 1 and the reference plate 2 so that bending can be performed even when placed on a desk. 8D is a long notch formed on the lower edge of each thin plate 3, and when the desired thin plate 3 is turned over to the grip part 1 side, circuit components can be placed on the notch 8D. Used when bending lead wire terminals of circuit components.

As described above, the lead wire bending jig of the present invention determines the minimum width of the groove C into which the main body P of the circuit component with the lead wire terminal is placed horizontally, and also has a reference plate 2 of a constant thickness that forms the bottom of the groove C. is integrally protruded from one end of the grip part 1, and on both sides of the reference plate 2, the same number of thin plates 3 for setting the lead wire bending width and body receiving groove width on which the lead wire terminals 1 are placed are stacked. The thin plate 3 is attached to the reference plate 2 with a common shaft 4 at the end near the grip, so that the thin plates 3L and 3R on the outside of the required bending width of the lead wire terminal l can be reversed toward the grip, and the reference plate 2 Since the fixing member 6 for positioning the thin plate 3 parallel to the reference plate 2 is provided at the tip of the reference plate 2, when producing various types of circuit units in small to medium quantities, the required number of circuit parts can be adjusted each time the circuit parts are assembled. The lead wire terminals of the parts can be bent to the required width, so no circuit parts are wasted. Lead wires for circuit components of various capacities can be bent using one jig, and since the circuit components are stably placed on the jig, the bending can be performed accurately. Furthermore, the bending width of the lead wire terminal can be freely changed according to the hole spacing of the printed wiring board, which has the effect of improving the efficiency of assembling circuit components.

[Brief explanation of drawings]

FIG. 1 is a plan view of the lead wire bending jig of the present invention;
Figure 2 is a side view, Figure 3 is a side view with the thin plate reversed, Figure 4 is a side view with the main body receiving groove width and lead wire bending width set, and Figure 5 is a side view with circuit components mounted. 6 is a vertical sectional view taken along the line of FIG. 5, FIG. 7 is a vertical sectional view when circuit components of different sizes are mounted, and FIG. Side view of the width and lead wire bending width settings,
Figure 9, Figure 10, Figure 11 are Figure 8 - line,
- Enlarged longitudinal cross-sectional view along line and XI-XI. 1 is a grip part, 2 is a reference plate, 3 is a thin plate, 4 is a thin plate mounting shaft, 5 is a fixing member, P is the main body of the circuit component, l
is a lead wire terminal, B is a printed wiring board, and H1 and H2 are holes.

Claims (1)

[Claims] 1. Determine the minimum width of the groove into which the main body of the circuit component with lead wire terminals is laid horizontally, and provide a reference plate of a certain thickness that will form the bottom of the groove and protrude integrally from one end of the grip,
On both sides of the reference plate, stack the same number of thin plates for setting the lead wire bending width and body receiving groove width on which the lead wire terminals are placed, and align the thin plates with a common axis to the reference plate at the end near the grip. Comes with a lead wire terminal that allows the thin plate outside the required bending width of the lead wire terminal to be flipped toward the grip, and has a fixing member at the tip of the reference plate that positions the thin plate parallel to the reference plate. Lead wire bending jig for circuit components.