JPH0155550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a blade holder having a blade holder and used for electrical outlets, table taps, and the like.

(Prior Art) Generally, blade holder fittings used for electrical outlets or table taps are formed by bending a metal plate by press working, and have a pair of blade holder parts.
Blade receivers are provided at both ends of the side plate.

As shown in, for example, Japanese Utility Model Publication No. 44-22598, Japanese Utility Model Publication No. 48-15350, and Japanese Utility Model Publication No. 51-39195, the conventional seed blade holder is
A pair of side plates with open bottoms are connected by a bridge, and blade receivers are formed extending from both ends of the side plates.

(Problems to be Solved by the Invention) However, in the above-mentioned blade, since the middle part of the bottom surface is open, it is easily deformed during press working, and the elastic holding force of the blade receiving part may not be stable. In order to prevent this, if reinforcing beads are provided on the side plate portions, the number of processing steps increases and processing becomes troublesome.

Furthermore, as shown in Japanese Utility Model Publication No. 39-3977, a blade in which the bottom plate portion is formed to extend outward from the blade receiving portion has also been proposed. Although this device is stable in terms of performance, it requires more material for the extending portion and becomes larger, and there are disadvantages such as an increase in the size of the outlet that accommodates this blade holder.

The present invention was made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a blade holder that uses a small amount of material, is easy to process, prevents deformation, and can stabilize the holding force of a plug blade. shall be.

[Structure of the Invention] (Means for Solving the Problems) The blade holder of the present invention includes an elongated bottom plate, a pair of side plates standing up from both sides in the longitudinal direction of the bottom plate, and A pair of blade receivers are formed at both ends of the longitudinal direction of the side plate portions and extend from the side plate portions, respectively, and a notch is provided opposite to the blade receivers at both ends of the bottom plate in the longitudinal direction. It is characterized by a window and a bridge between the side panels at the end.

(Function) When manufacturing the blade holder, the bottom plate, side plate, blade holder, notch window, and bridge are formed by punching out the bottom plate part, side plate part, blade holder part, and bridge in the state before bending. The parts are bent in advance at the parts that form the blade receiver shape and the side plate shape, respectively. This bent plate is bent on a press stage by inserting a bottom curved punch provided on the upper die of the mold from both longitudinal ends of the plate along the cam portion provided on the lower die. At this time, since bridges and cutout windows are formed at both ends of the bottom plate,
Insertion of the punch into the bottom plate portion is only about the width of the bridge, and the punch can be pulled out along the cam portion of the lower mold after bending, and the distance is short and easy.

(Example) An example of the present invention will be described with reference to FIGS. 1 to 8. Reference numeral 1 denotes a blade holder, and the blade holder 1 includes an elongated bottom plate 2, a pair of side plates 3, 3 standing up from both sides along the longitudinal direction of the bottom plate 2, and A pair of blade receivers 4, 4 are formed extending from the side plates 3, 3 at both end portions, respectively.
It is made of a conductive material including.

This blade holder 1 has the following features at both ends of the bottom plate portion 2:
A cutout window 5 is provided in the middle portion facing the blade receiving portion 4, and a bridge 6 is formed between the side plate portions 3, 3 at the end portions. It is desirable that the width of the bridge 6 is narrower than the width of the blade receiving part 4.

Next, the operation of this embodiment will be explained. To manufacture the blade holder 1, it is processed by press working in the stage of a conventional progressive processing die. At that time, as shown in FIG. 2, in the state before the bending process, a plate body with a bottom plate part 2, side plate parts 3, 3, blade receivers 4, 4, notch windows and bridges 6 formed by punching. 11 is bent along the bending lines 4a, 4b, and 4c of the plate surfaces forming the blade receivers 4, 4, respectively, as shown in FIG. Then, when bending the blade receiving parts 4, 4 and the side plate parts 3, 3, as shown in FIG. The bottom bending punch 14 provided on the mold 13 is inserted from both ends in the longitudinal direction along the inclined surface 16 provided on the lower mold 15 to perform the bending process along the folding lines 2a, 2b, 2c, and 2d of the bottom plate portion 2. Let's do it.

That is, in the blade receiving part 4, the plate 11 is changed from a flat plate state shown in FIG. 7a to a blade as shown in FIGS. 7c and 5 through the bending process shown in FIG. 7b. A receiving portion 4 is formed.

Further, in the side plate portions 3, 3 of the plate body 11, side plate blanks 3, 3 are formed by bending as shown in FIG. 8c from the flat plate state shown in FIGS. 8a and 8b.

Then, bridges 6 are provided at both ends of the bottom plate portion 2.
Since the notch window 5 is formed opposite the blade receiving part 4, it is not necessary to insert the punch 14 into the bottom plate part 2 side to reach the notch window 5, and the bottom plate part 2 is supported by the bridge 6. Since the bending process can be performed using the upper mold 13, the blade receiving part 4 can be bent by a few mm, which is about the width of the bridge 6.
Punch 14 that can be bent and after the bending process.
can be pulled out along the inclined surface 16 of the lower mold 15,
Since that distance is also short, the mold can be small. As a result, the blade holder 1 can be removed from the mold in a short time, improving work efficiency. Moreover, since a mold with a complicated structure is not required, there is no risk of breakage, and the press processing speed can be increased.

[Effects of the Invention] As described in detail above, the present invention has a bottom plate portion and a side plate portion, and a pair of blade receiving portions extending from the side plate portions are provided at both ends of the bottom plate portion. Since a notched window is provided in the middle and a bridge is formed between the side plates at the end, the notched window can be provided in the bottom plate to reduce the amount of material used, and the longitudinal ends of the bottom plate can be connected to the bridge. Since the blades are connected in this way, outward deformation of the blade receiving portion can be prevented, and the holding force of the plug blade can be stabilized. In addition, since the punch can be inserted as a presser during bending at the bridge position, the distance required is as short as the width of the bridge, and the amount of punch insertion can be shortened, speeding up the press processing speed and improving work efficiency. can be increased. Further, since no protrusion is formed outside the blade receiver, it can be made smaller, and the outlet that accommodates this blade receiver can also be made smaller.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the blade holder of the present invention, Fig. 2 is a plan view showing the same developed and Fig. 3
Figure 4 and Figure 4 are explanatory diagrams schematically showing the state of bending, Figure 5 is a sectional view taken along the - line in Figure 3, and Figure 6 is a side view of the blade holder in the bent state. Figures 7a to 7c are explanatory diagrams showing the order of bending the blade receiving part of the blade holder, and Figures 8a to 8c are explanatory diagrams showing the order of bending the side plate part of the blade holder. . 1...Blade receiver metal fitting, 2...Bottom plate part, 3, 3...Side plate part, 4, 4...Blade receiver part, 5...Notch window, 6...
Bridge.

Claims (1)

[Scope of Claims] 1. An elongated bottom plate part; A pair of side plate parts standing up from both sides in the longitudinal direction of the bottom plate part; Extending from the side plate parts at both ends of the bottom plate part in the longitudinal direction; and a pair of blade receivers; characterized in that cutout windows are provided at both ends of the bottom plate in the longitudinal direction opposite to the blade receivers, and a bridge is provided between the side plates at the ends. Blade holder.