JPH0334053Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention mainly relates to means for preventing a tightening screw from falling off in a free state of a terminal connecting device.

[Prior art and its problems]

As this type of terminal connection device, for example, JP-A-59
-54178 and JP-A-59-184474 are known. However, in all of these devices, an insulating stand is attached to a rail or shaft for each pole, and multiple poles are connected to each other, so one side is completely open, and this open surface can be used to Since the method of assembling members is adopted, there is a drawback that these means for preventing screws from falling off cannot be adopted in an integrally molded insulating stand.

[Purpose of invention]

In view of the above, the purpose of this invention is to provide a terminal connection device that is equipped with a means for preventing the tightening screw from falling off in the free state, which can be used in an integrated insulating stand in which the number of poles is determined in advance and is made into a series. be.

[Key points of the idea]

The main point of this invention is that, in order to achieve the above-mentioned purpose, a square hole is provided in the center wall that partitions the partition wall so that at least one pole can be arranged in parallel through the partition wall, an insulating stand in which slots and cavities are provided from the inside symmetrically with the central wall on both pedestals, and threaded holes and slots that are placed on the pedestals by passing through the square holes and leading to each of the cavities. A strip-shaped connecting conductor having thin grooves cut in an alternating manner, and a screw having an L-shape and screwed into each of the screw holes on one leg of the conductor are rotatable and prevented from coming out. a screw retaining plate having a locking concave and convex surface on the side surface of which the side leg piece is inserted into the narrow groove through the narrow groove and can freely move forward and backward; The present invention previously includes a wire spring that engages with the locking concavities and convexities to prevent the screw from falling off in the free state.

[Example of idea]

1 to 6 are views showing one embodiment of the terminal connecting device according to this invention, in which FIG. 1 is a perspective view, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. FIG. 2 is an exploded perspective view, and FIGS. 4 to 6 are sectional views showing the screw tightening process. In the figure, an insulating stand 1 having eight poles integrated therein is provided with a partition wall 1b for each pole stand 1a, and is partitioned by a central wall 1c. A square hole 1d is provided in the center wall 1c and communicates with the upper surface of the pedestal 1a on both sides at a position approximately at the same height.
A slit 1e and a cavity 1f are provided in the pedestals 1a on both sides from the inside to the outside symmetrically with respect to the center wall 1c. On each pedestal 1a, a connecting conductor 2 is placed in a square hole 1d by press fitting from the direction of arrow A, and the connecting conductor 2 has a threaded hole 2a facing the empty space 1f of the pedestal 1a and an alternating hole leading to the narrow gap 1e. Cut narrow groove 2
b is provided. A connecting conductor 2 is provided in each gap 1e.
A screw holding plate 3 is inserted so as to be freely forward and backward through the corresponding narrow groove 2b, and the screw holding plate 3 is bent into an L shape and screwed into the screw hole 2a of the connecting conductor 2 on one side leg piece 3a. The screw 4 is rotatably supported by axial restraint, and the other leg piece 3b has a locking concave and convex portion having a narrow inner side cut off so as to be able to pass through the aforementioned narrow groove 2b and a slope 3c at the tip. 3d is formed. Before the connection conductor 2 is attached, the locking concave-convex portion 3d is engaged with one end of the wire spring 5 elastically loaded in the empty space 1f of the insulating stand 1 to prevent it from coming off. The wire spring 5 is formed by extending one end of a spring portion 5a formed in a substantially U-shape, and changing the direction by 90 degrees to engage the locking concave and convex portion 3d. The screw holding plate 3 and the wire spring 5 can be the same on both sides of the center wall 1c. Moreover, the wire spring 5 is not limited to this, and the wire spring 6 shown in FIGS. 7 and 8, respectively.
The spring portions 6a and 7a may be formed into a U-shape or a V-shape as shown in FIGS.

In this embodiment, with the above configuration, the screw 4 held on the screw holding plate 3 is pressed and twisted with a screwdriver to the connecting conductor 2 on the pedestal 1a of the insulating stand 1, so that the corresponding screw hole of the connecting conductor 2 is inserted into the connecting conductor 2. At the same time, the connecting wire (not shown) inserted onto the connecting conductor 2 is tightened, and at the same time, the locking projections and recesses 3d of the screw holding plate 3 move in line with the tip of the wire spring 5. This ensures stable pressing, that is, a connected state at all times, and also ensures that it is prevented from falling off in the position where the connecting wire is removed, that is, when the screw 4 is separated from the connecting conductor 2 and becomes free.

[Effect of idea]

According to this invention, the connecting conductor is held on the center wall of an insulating stand that can be arranged in parallel with many poles, and is guided so as to move forward and backward by the connecting conductor and the pedestal located on the pedestal, and the terminal screw is made rotatable and supported by axial movement restraint. By having a configuration including a screw holding plate and a wire spring housed in a pedestal that engages with the screw holding plate and prevents it from falling off,
It is possible to provide a terminal connection device with a multi-pole integrated structure that is compact and does not impair ease of handling.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the terminal connecting device according to this invention, in which FIG. 1 is an overall perspective view, FIG. 2 is a cross-sectional view taken along the line - in FIG. 1, and FIG. 2 is an exploded perspective view, FIGS. 4 to 6 are sectional views showing the screw tightening process, and FIGS. 7 and 8 are perspective views of essential parts of different embodiments of the terminal connecting device according to the invention. 1... Insulation stand, 1a... Pedestal, 1b... Partition wall,
1c...center wall, 1d...square hole, 1e...slit,
1f... Vacancy, 2... Connection conductor, 2a... Screw hole, 2b... Thin groove, 3... Screw holding plate, 3a...
One side leg piece, 3b...other side leg piece, 3d...locking unevenness, 4...screw, 5...wire spring.

Claims (1)

[Scope of utility model registration request] A square hole is provided in the central wall that partitions the partition walls so that at least one pole or more can be arranged in parallel through the partition wall, and a slit and a cavity are formed in the pedestals on both sides of the center wall from the inside symmetrically with the center wall. an insulating pedestal provided with an insulating pedestal, and a strip-shaped connecting conductor that is inserted through the square hole and placed on the pedestal and has threaded holes facing each of the voids and narrow grooves cut in alternating directions leading to each of the slits. A screw having an L-shape and screwed into each of the screw holes on one side of the leg piece is rotatable and prevented from coming out, and the other side leg piece is inserted into the narrow gap through the narrow groove and can move forward and backward. a screw holding plate having a locking concavity and convexity on a side surface; and a wire spring that is elastically loaded in the cavity and has one end that engages with the locking concavity and convexity before the screw is screwed into the screw hole of the connection conductor. A terminal connection device characterized by: