JPS6343807Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in a terminal structure for attaching a wiring material, particularly to a terminal structure in which a wiring material terminal is screwed to a terminal board.

The installation of wiring material terminals in various devices and instruments, such as electromagnetic contactors that control the opening and closing of electrical circuits, or motor control equipment that inputs control current from these electromagnetic contactors, is usually conventional because it is easy to attach and remove the wiring materials. This is done by fixing screws from the terminal board to the terminal board. This conventional terminal structure for attaching wiring materials includes a terminal screw with a washer rotatably attached to the lower end of the head of the screw, and a terminal plate on which a screw for screwing the terminal screw is formed, and the terminal screw has a It has a structure in which the terminal of the wiring material is screwed onto the screw of the terminal plate and fixed between the terminal plate and the washer. The terminal of the wiring material is preferably a ring-shaped round crimp terminal that is used by being fitted into the screw portion and does not come off even if the screw becomes loose, from the viewpoint of preventing danger due to the terminal coming off.

However, with conventional terminal structures, when attaching and detaching the round crimp terminals, that is, when completely screwing the terminal screws out of the terminal board, the terminal screws cannot be held because human fingers cannot reach them. fell from the terminal board, resulting in the loss of terminal screws, and the fallen terminal screws caused short circuits in the electrical circuit.

Furthermore, in the conventional structure, great care must be taken to prevent the terminal screws from falling when attaching and detaching the round crimp terminals, making the process of attaching and detaching the terminals extremely complicated. Ta.

The present invention has been devised in view of the above-mentioned conventional problems, and its purpose is to provide an improved terminal structure for attaching wiring materials that allows terminals such as round crimp terminals to be attached and detached extremely easily.

In order to achieve the above object, the present invention provides a terminal screw in which a washer is rotatably attached to the lower end of the head of the screw, a terminal plate in which the terminal screw screw is formed, and a terminal plate provided above the terminal plate. A terminal structure for mounting a wiring material, including an elastic insulating guide wall that guides the vertical movement of the terminal screw, wherein the terminal screw is screwed into the screw of the terminal board, and the terminal of the wiring material is fixed between washers of the terminal board. The elastic insulating guide wall is provided with an engaging claw so that the terminal screw unscrewed from the terminal plate is engaged with and held at a predetermined distance from the terminal plate.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

1 and 2 show a first embodiment of a terminal structure for attaching wiring materials according to the present invention, particularly applied to a terminal structure of an electromagnetic contactor, in which a terminal plate 12 is arranged on the upper surface of an insulating base 10. The setting is fixed. The terminal plate 12
A terminal screw screw 14 is formed at the tip of the terminal board 12, and a terminal screw relief hole 16 is formed on the upper surface of the insulating base 10 opposite to the screw forming portion of the terminal board 12.
is provided.

A terminal screw 18 is screwed into the screw 14 of the terminal board 12 in order to screw a wiring material terminal (not shown) to the terminal board 12. The terminal screw 18 is the first
As shown in the figure, it consists of a combination of a screw 20 and a washer 22. That is, a washer 22 is attached to the lower end of the head of the screw 20 so as to be rotatable and non-separable from the screw 20, and the two 20 and 22 are inseparably connected.

The wiring material terminal is fixedly pressed between the terminal plate 12 and the washer 22 by screwing the terminal screw 18 onto the terminal plate 12. At this time, the lower end of the terminal screw 18 is inserted into the escape hole 16, and the contact between the terminal screw 18 and the insulating base 10 is avoided.

Further, above the terminal plate 12, the terminal screw 18 is provided.
An elastic insulating guide wall is provided to guide the vertical movement of the.

This elastic insulating guide wall extends from the top wall of the terminal cover 24 covering the wiring material terminal mounting portion to at least two elastic insulating guide walls 26 made of, for example, synthetic resin.
a and 26b are vertically arranged to face each other. One of the elastic insulating guide walls 26a, that is, the guide wall 26a on the terminal board tip end side in FIG.
A gap 28 is formed between the upper surfaces of the two, in which a tool can be inserted. The lower end of the other guide wall 26b extends vertically to just above the terminal plate 12.

A tool insertion hole 30 for a terminal screw fastening tool is bored in the top wall of the terminal cover 24 between the guide walls 26a and 26b.

In the vertical sliding range of the terminal screw 18, the gap between the guide walls 26a and 26b is
It is formed slightly smaller than the width of the washer 8. As a result, the terminal screw 18 is attached to both guide walls 26a, 2.
The elastic force of 6b makes it possible to hold it securely.

Here, the characteristic feature of this invention is that both guide walls 2
6a, 26b are provided with engaging claws 32a, 32b.

The engaging claws 32a, 32b lift and hold the terminal screw 18 onto the engaging claws 32a, 32b, and create a predetermined gap between the lower end of the terminal screw 18 and the terminal plate 12, that is, a gap sufficient to insert the wiring material terminal. established to obtain.

In FIG. 1, an engaging pawl 32a is formed protruding inside the lower end of the elastic insulating wall 26a, and the other elastic insulating wall 26b has a terminal screw 18 located at approximately the same height as the engaging pawl 32a. is screw 1
4, the engaging claw 3 is located at a position slightly above the position of the washer 22 on the terminal screw 18.
2b is provided.

Therefore, when the terminal screw 18 is unscrewed from the screw 14, by lifting the terminal screw 18 further upward with a tool, the lower surface of the washer 22 is engaged and held by the engaging claws 32a and 32b. , terminal screw 1
A predetermined gap 33 between the lower end of 8 and the upper surface of the terminal plate 12.
is formed, and it becomes possible to easily insert a round crimp terminal, which is a wiring material terminal, into the upper surface of the screw forming portion of the terminal plate 12 through this gap 33.

As described above, the wiring material terminals are fixed to the terminal board 12 with screws, for example, as follows.

First, attach the terminal screw 18 to the guide walls 26a and 26b.
The two guide walls 26 are inserted from the lateral opening surface of the
a, 26b, then a screw tightening tool is inserted through the tool insertion hole 30, and a wiring material terminal is inserted through the gap 28 between the terminal plate 12 and the elastic insulating wall 26a. Then, with a wiring material terminal, in this embodiment a round crimp terminal, placed on the upper surface of the screw forming part of the terminal board 12, the terminal screw 18 is screwed onto the screw, so that the round crimp terminal is fitted onto the screw 20. They are then pressed together and fixed to the terminal plate 12.

Further, when the round crimp terminal is removed from the terminal board 12, the terminal screw 18 is completely unscrewed from the screw 14.

When the terminal screw 18 is screwed into and unscrewed from the screw 14, the terminal screw 18 is attached to both guide walls 26a, 2.
It is elastically held by 6b and moves up and down. For this reason,
The terminal screw 18 is reliably prevented from falling from the terminal board 12 when the terminal screw 18 is attached or detached.

Further, in this embodiment, a tool insertion opening 34 is formed in the guide wall 26a.

The tool insertion opening 34 is formed by cutting from the center of the lower end of the elastic insulating wall 26a in FIG. By lifting the terminal screw 18 in this state, it is possible to facilitate the above-described operation of engaging and holding the terminal screw 18 with the engaging claws 32a and 32b.

3 and 4 show a second embodiment of the terminal structure for attaching wiring materials according to the present invention, and the same members as those in the first embodiment described above are given the same reference numerals and their explanations will be omitted. .

The feature of this embodiment is that the guide wall 26
An inclined surface or curved surface that widens upward is formed in the lower half of the opposing surfaces of the surfaces a and 26b.

That is, the guide wall 26a shown in FIG.
At approximately the lower half of 26b, engaging claws 32a, 3
The upper part than 2b is an inclined surface 36 that expands upward.
On the other hand, the guide walls 26a and 26b shown in FIG. 4 are formed into curved surfaces 36a' and 36b' that expand upward at corresponding locations.

In this way, the inclined surface 3 is attached to the guide walls 26a, 26b.
6a, 36b or curved surfaces 36a', 36b', the engaging pawl 32 is provided at a lower position than in the first embodiment. That is, as shown in FIG. 3, engaging claws 32a and 32b are provided so that when the terminal screw 18 is unscrewed from the screw 14, the washer 22 is engaged and held by the engaging claws 32a and 32b. As a result, when the terminal screw 18 is unscrewed from the screw 14, the terminal screw 18 is elastically held by the sloped surfaces 36a, 36b or the curved surfaces 36a', 36b' of the guide wall, but the holding surface is not the sloped surface. Alternatively, since it is a curved surface, an upward component of the elastic holding force, that is, an upward pressing force is applied, and the terminal screw 18 is automatically slid upward. As a result, a predetermined gap 33 is formed between the lower end of the terminal screw 18 and the terminal plate 12, making it easier to attach and detach the round crimp terminal.

As explained above, according to the present invention, the engaging claws 32a, 32 are attached to the elastic insulating guide walls 26a, 26b.
b, and the terminal screw 1 is unscrewed from the terminal board 12.
8 is engaged and held with the terminal board 12 with a predetermined gap 33, a predetermined gap is formed between the lower end of the terminal screw 18 and the top surface of the terminal plate 12, making it easy to insert and remove the round crimp terminal. can be done.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing a first embodiment of the terminal structure for attaching wiring materials according to the present invention, Fig. 2 is a perspective view of the elastic insulation guide wall in Fig. 1, and Fig. 3 is a wiring according to the present invention. FIG. 4 is a vertical sectional front view showing a second embodiment of the terminal structure for attaching a material, and FIG. 4 is a perspective view of an elastic insulating guide wall showing an example in which the inclined surface of the elastic insulating guide wall in FIG. 3 is formed into a curved surface. The same members in each figure are given the same reference numerals, 12 is a terminal plate, 14 is a screw, 18 is a terminal screw, 20 is a screw, 22 is a washer, 26a, 26b is an elastic insulating guide wall, 32a, 32b is an engagement Nail, 33 is gap, 3
4 is an opening for inserting a tool, 36a and 36b are inclined surfaces, and 36a' and 36b' are curved surfaces.

Claims (1)

[Claims for Utility Model Registration] (1) A terminal screw having a washer rotatably attached to the lower end of the head of the screw, a terminal plate on which the terminal screw screw is formed, and a terminal plate provided above the terminal plate. A terminal structure for mounting a wiring material, including an elastic insulating guide wall that guides the vertical movement of the terminal screw, wherein the terminal screw is screwed into the screw of the terminal board, and the terminal of the wiring material is fixed between the terminal board and the washer. , wherein the elastic insulating guide wall is provided with an engaging claw, and the terminal screw unscrewed from the terminal board is engaged with and held at a predetermined interval with the terminal board. . (2) In the terminal structure for attaching wiring materials as described in claim (1) of the utility model registration, the elastic insulating guide wall that guides the vertical movement of the terminal screw extends upward in the lower half of the opposing surface. A terminal structure for attaching a wiring material, characterized in that a sloped surface or a curved surface that opens is formed. (3) In the terminal structure for attaching wiring materials as described in claim (1) or (2) of the utility model registration, at least one of the elastic insulating guide walls that guide the vertical movement of the terminal screw has a terminal A terminal structure for attaching a wiring material, characterized in that an opening for inserting a tool is formed to manually adjust the position of a screw.