JPS6348153B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method of manufacturing a wiring board having an L-bend terminal used in a power distribution branch box.

(Prior art and its problems) Bus bar 1 having an L-shaped terminal, that is, an L-shaped terminal used in a power distribution branch box.
As for the manufacturing method of the assembly of the insulating partition plate 2 and the insulating partition plate 2, one layer of bridge bus bars, that is, a unit layer of U, are punched out of a hoop material and continuously connected by connecting portions.
(See Figure 1) Cut the insulating partition plate 2 into one layer of the bridge bus bar by hand, insert the L-bent terminal into the terminal insertion hole 21 of the insulating partition plate 2, and secure the bridge bus bar by caulking with resin or the like. conduct,
A method has been adopted in which the bridge portion 12 of the bus bar is then cut off.

In the above method, the cut bridge bus bar for one layer is bent before the insulating partition plate is supplied, and the L
If the tooth alignment of the bent terminal is misaligned, the L-bent terminal may not be able to be inserted into the terminal insertion hole, or if one layer of bridge bus bars is stacked, they may become entangled with each other, which may hinder assembly work with the insulating board. It was hot. Furthermore, if one layer of the bridge bus bar is assembled to the insulating plate in a bent state, quality problems will occur.

(Disclosure of the Invention) The present invention solves the above-mentioned defects in the conventional manufacturing method by directly punching the bridge bus bar having L-bent terminals that are continuously punched out of the hoop material and sequentially fed through the connecting portion. The present invention aims to solve this problem by supplying an insulating partition plate, and furthermore, the present invention aims to solve the problem by supplying the above-mentioned insulating partition plate, inserting the L-bending terminal into the terminal insertion hole, fixing the bridge bus bar and the insulating partition plate, and fixing the bridge bus bar and the insulating partition plate. By continuously cutting the bridge after fixing, the number of man-hours is significantly reduced.

The manufacturing method of the present invention will be explained in detail below with reference to the drawings.

First, a so-called hoop-shaped piece 5, in which one layer of bridge bus bars are continuously connected by a connecting part, for example, an ear part 13, as shown in FIG. 1, is used, which is punched out of a hoop material. The bridge busbar referred to here refers to one in which one layer of busbars 1 is bridge-coupled 12 at required points. Reference numeral 11 indicates a terminal, that is, an L-bend terminal, and 14 indicates a pilot hole. This continuous bridge bus bar is manufactured by a progressive press or the like and is not a special product. Busbar materials include brass, Cu, Fe, Al, etc., which are either bare or plated with Sn, Ni, or Zn (the thickness of the busbar is 0.3 to 2.0 mm).

FIG. 2 shows one insulating partition plate 2. As shown in FIG. this is
Use sheet plastic material with a thickness of about 0.1 to 3.0 mm. The plastic materials include thermosetting resins such as phenolic resin, epoxy resin, and unsaturated polyester, or polyethylene, polypropylene, polyvinyl chloride, acrylonitrile butadiene styrene copolymer (ABS), polyamide, polyester, polyacetal, polyimide, fluororesin, It is made of thermoplastic synthetic resins such as silicone resins or copolymers thereof, or these synthetic resins filled with various fillers such as talc, glass fibers, calcium carbonate, and paper.

The insulating partition plate may, of course, be an injection molded product, but sheet materials are advantageous over injection molded products because they can be easily made thin and the precision of punching holes in a press is good. Therefore, a sheet-shaped regular length material or a coil-shaped material is perforated using a press as shown in FIG. 21 is a terminal insertion hole, 22 is a bridge cutting hole, 23 is a bus bar holding hole, and 24 is a pilot hole. FIG. 2 shows one insulating partition plate that has been drilled, but if a coiled material is used, it may be a so-called hoop-shaped insulating partition plate that is continuous.

Figure 3 shows bridge bus bars 5 that are connected continuously.
A press mold diagram for automatically assembling the insulating partition plate 2 is shown. The automatic assembly includes three steps: inserting a continuous bridge bus bar and insulating partition plate, fixing the bus bar, and cutting the bridge portion of the bus bar.

Although FIG. 3 shows a case where the insulating partition plates are placed one by one in a cassette and automatically supplied, they may also be automatically supplied from a so-called hoop material wound into a coil. Furthermore, although FIG. 3 is a structural diagram of a progressive die and a separation tandem method for manufacturing a bridge bus bar, this structure may be installed within the progressive die.

The automatic assembly mechanism is as follows. The continuous bridge bus bars 5 manufactured by a progressive mold (not shown) are sent to an inching feed device 31 and are intermittent fed in complete synchronization with the progressive mold. slide and stop at a predetermined position 34. The insulating partition plate 2 is supplied to a predetermined position 34 by an automatic supply device 37 in synchronization with the feeding of the bridge bus bar. This predetermined position is a position where the bridge bus bar can be inserted and combined with the insulating partition plate.

FIG. 4 is a cross-sectional view taken along the line A-A' in FIG. 3, and shows the movement of the press after the bridge bus bar and the insulating partition plate have stopped at their fixed positions. In operation, the upper die 45 of the press is lowered, and two or more pilot pins 40 first pass through the pilot holes 14 of the bridge bus bar to accurately position the bridge bus bar.

Further, the pilot pin descends and passes through the pilot hole 24 of the insulating partition plate, and the bridge bus bar and the insulating partition plate are positioned with high precision. In order to further stabilize the accuracy, it is better to perform pilot positioning at the front stage station. In parallel with this operation, a holding jig 43 for preventing the bridge bus bar from warping, wobbling due to vibration, etc. is moved upwardly by the drive section 46. The drive unit 46 is designed as an air type, an electromagnetic type, a mechanism type, or the like.

After the bridge bus bar and the insulating partition plate are perfectly positioned in this manner, the stripper (spring-equipped plane holding plate) 33 presses down the bridge bus bar 5 and the guide lifter 32. At this time, since the above-mentioned busbar holder is operating from below, the terminals 11 of the busbar are inserted into the holes 21 of the insulating partition plate with the bridge busbar being fixed at the required places both above and below.

In order to facilitate this automatic insertion, a chamfer 15 is formed on the tip of the L-bent terminal 11 of the bus bar as shown in FIG. Enables reliable insertion. When the insertion is completed, the wide portion 16 formed by the crush or tab at the base of the terminal is bitten into the hole 21 of the insulating partition plate and fixed as shown in FIGS. 6 and 7 by the spring pressure of the stripper 33. Note that when the bus bar terminals are in the opposite direction 11' as shown in FIG. 8, they are press-fitted and fixed at the same time by bending pins 17.

Stripper 3 after fixing the bridge busbar
3, the upper punch 39 operates to cut the bridge (12 in FIG. 1) of the bridge bus bar.

As a result, automatic insertion, fixing, and bridge cutting are all completed, and when the upper mold is raised, the bus bar 6 assembled on the insulating partition plate rises to its original position together with the guide lifter 32. In this case, the assembled bus bar 6 is left with some bridge cutting left. are connected to the ears (connecting parts on both sides of the product) 13 of a continuous bus bar.

At this point, the inching feed device 31 operates again and slides one station, and the assembled bus bar reaches the next station B-B'.

FIG. 5 shows a cross section taken along line B-B'. Partial bridge part (bridge connected to ear 12 in Figure 1)
The remaining bridge portion of the assembled bus bar 6 is cut off by a pestle punch 39, and the assembled bus bar discharge portion 35 is removed.
It descends from the mold and is discharged from the mold by a belt conveyor 38. Reference numeral 44 denotes a punch for separating the assembled busbars for the above purpose. If the case of the power distribution branch box is placed on this conveyor part, automatic case operation becomes possible.

The insulating partition plate 25 in the pilot part is also cut off at the same time and remains in the vicinity, which is blown away by the air blowing from the pipe 36. The ears 16 of the continuous bus bar are 4
It is cut and removed at point 7.

This completes one cycle of automatic assembly, and the bridge bus bars are assembled one after another at a speed synchronized with the production of consecutive bridge bus bars (1 second after takt). Although the insulating partition plate is placed below the busbar in the above example, it can be designed using the same idea above.

(Effects of the Invention) As described above, by carrying out the manufacturing method of the present invention, the following advantages are brought about.

The L-bent terminals 11 of the bridge bus bar 5, which are punched out of hoop material and fed progressively, have excellent tooth alignment accuracy, so if an insulating partition plate is supplied directly to the bridge bus bar 5, the terminal insertion hole of the L-bend terminal 11 will be reduced. Insertion into 21 becomes smooth.

In addition, the number of steps can be significantly reduced by continuously performing the steps of supplying the insulating partition plate 2, inserting the L-bent terminal into the terminal insertion hole, fixing the bridge bus bar 5 to the insulating partition plate 2, and cutting the bridge.

Moreover, as mentioned above, the bridge bus bar 5 is assembled on the insulating partition plate with high precision tooth alignment.
Since the L-bending terminal 11 is used to cut the bridge 12 after the bridge bus bar 5 is fixed, the accuracy of the tooth alignment is not affected even after the bridge is cut, and the L-bend terminal 11 is placed on the insulating partition plate 2 with a highly accurate tooth alignment. It will be located in
A wiring board with excellent quality can also be obtained.

In the present invention, the method of fixing the bus bar 1 to the insulating partition plate 2 was described using the wide part of the root part of the L-bend terminal, but this is not possible with the resin caulking 26 as shown in FIG. It is also possible to use a negative fitting groove 27 provided in an insulating partition plate as shown in the figure. In addition, as an insulating partition plate, a fixed length or coiled sheet material is punched and pressed (small protrusions (half punched) to prevent contact between bus bars are also attached at the same time).
An injection molded product with a mold or resin caulking protrusion or groove can be used.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a continuous bridge bus bar used in the present invention, Fig. 2 is a perspective view of an insulating partition plate used in the present invention, and Fig. 3 is a perspective view of an automatic assembly used in the present invention. Fig. 4 is a sectional view of the press die for the insertion/fixation and bridge cutting portion in Fig. 3; Fig. 5 is a sectional view of the die for the ejection part in Fig. 3; The figures are a front view (Figure a) and a side view (Figure b) when the terminal is inserted, Figure 7 is a front view (Figure a) and a side view (Figure b) after the terminal is inserted and fixed, and Figure 8
9 is a perspective view of a bus bar illustrating the case of having a terminal in a reverse direction, FIG. 9 is a diagram illustrating resin caulking, and FIG. 10 is a diagram illustrating negative fitting. 1... Bus bar, 2... Insulating partition plate, 5... Continuous bridge bus bar, 6... Bus bar provided on the insulating partition plate, 11... Terminal, 11'
... Reverse direction terminal, 12 ... Bridge, 13 ... Ear part, 14 ... Pilot hole, 15 ... Chamfer,
16...Crushing portion, 17...Bending pin, 21...
Terminal insertion hole, 22... Bridge cutting hole, 2
3... Busbar holding hole, 24... Pilot hole, 25... Pilot part, 26... Resin caulking, 27... Groove, 31... Inching feed device, 32...
...Guide lifter, 33...Stripper, 34
... Determined position, 35 ... Assembly bus bar discharge section, 36 ... Pipe, 37 ... Automatic feeding device, 3
8...Belt conveyor, 39...Upper punch,
40... Pilot pin, 41... Hole for sinking the terminal, 42... Female hole for cutting the bridge, 4
3...Busbar holding jig, 44...Punch for separating the assembled busbar, 45...Upper die, 46...Busbar holding jig drive unit, 47...Point where busbar ears are cut, U...Bridge busbar 1 layer.

Claims (1)

[Scope of Claims] 1. Insertion of terminals corresponding to the L-bent terminals and bridges into a bridge bus bar having L-bent terminals that are continuously punched out of a hoop material and successively fed through connecting portions. The present invention is characterized by supplying an insulating partition plate having a hole and a bridge cutting hole, inserting an L-bending terminal into the terminal insertion hole, fixing the bridge bus bar and the insulating partition plate, and continuously performing bridge cutting after fixing the bridge bus bar. A method for manufacturing a wiring board having an L-bend terminal used in a power distribution branch box. 2. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, wherein the connected bridge bus bar and insulating partition plate are supplied in a direction perpendicular to the latter with respect to the former. 3. The L-bend terminal used in the power distribution branch box according to claim 1, in which the bus bar and the insulating partition plate are fixed to each other by a wide part provided at the base of the L-bend terminal inserted into the terminal hole of the insulating partition plate. A method for manufacturing a wiring board having the following. 4. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, in which the bus bar and the insulating partition plate are fixed by resin caulking. 5. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, wherein the bus bar and the insulating partition plate are fixed to each other by grooves provided in the insulating partition plate. 6. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, in which a sheet material is used as an insulating partition plate. 7 L used in the power distribution branch box according to claim 1, which uses an injection molded product as an insulating partition plate
A method of manufacturing a wiring board having bent terminals. 8. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, which is punched out using a press in a progressive press for manufacturing connected bus bars. 9. A method for manufacturing a wiring board having an L-bend terminal for use in a power distribution branch box according to claim 1, wherein punching is performed using a progressive press for manufacturing connected bridge bus bars and another press in tandem.