JPH0831482A - External terminal block - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a terminal block to which many external wires can be screw-connected in a narrow space when viewed from the rear side. [Structure] A terminal block 10 includes an insulating base 11, a terminal fitting 13 having a screw tightening surface for external wiring, and a mounting screw 4. The pedestal 11 is integrally formed with bilaterally symmetrical two-step stair surfaces 12 arranged side by side in the vertical direction and two types of partition walls 14 and 15 for partitioning adjacent stair surfaces. The direction in which the mounting screw 4 is screwed into the screw hole formed in the terminal fitting 13 is indicated by a chain line arrow. On the other hand, the external wiring 1 is moved from the front side to the other side in the actual arrangement as shown by the solid line arrow, and after the crimp terminal 3 is placed on the surface of the terminal fitting 13, the mounting screw 4 is used. Tightened. Therefore, when connecting a large number of external wirings, a small space is required when viewed from the rear side, and the space efficiency of the external wiring 1 is improved. Furthermore, the wiring process of the external wiring 1 is easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block which is provided mainly on the back side of a panel mounting type instrument and to which external wiring is screw-connected. External terminal block that can be connected.

[0002]

2. Description of the Related Art FIG. 2 is a perspective view of a conventional example.
Will be described with reference to. In FIG. 2, the conventional terminal block
20 on the rear side of the panel-mounted instrument case (mounting holes 26
The base 21 made of an insulating material as a basic structure, a terminal fitting 23 having a screw tightening surface for external wiring, and a mounting screw 4.
The base 21 is integrally formed with three-step staircase surfaces 22 arranged side by side and two types of partition walls 24, 25 that partition adjacent staircase surfaces. When the terminal block 20 is viewed from the back side, the terminal metal fitting 23 is fixed to the surface of the staircase surface 22 facing the viewing direction. The mounting screw 4 is screwed into the screw hole formed in this. The screwing direction is indicated by a solid arrow.

In the external wiring 1, an insertion type crimp terminal 3 for screw tightening is fixed to a terminal portion of the wiring 2. External wiring 1
As indicated by the one-dot chain line arrow, the crimp terminal 3 is moved in the horizontal direction from the right side to the left side, the crimp terminal 3 is placed on the surface of the terminal fitting 23, and then the mounting screw 4 tightens the screw.

[0004]

The conventional example has the advantage that, when the crimp terminal 3 of the external wiring 1 is positioned on the terminal fitting 23, the condition of the positional relationship can be clearly seen, which is convenient. However, on the other hand, there are the following space problems. That is, to connect a large number of external wiring 1,
A large space is required when viewed from the rear side, and the space efficiency of the external wiring 1 is poor. The reason is that the terminal fittings 23 to which the crimp terminal 3 is clamped and fixed have a shape facing each other when viewed from the back side. In addition to this space problem, when a large number of instruments are arranged close to each other, the external wiring 1 is introduced from the rear side,
The tip must be bent at a right angle. If the number of external wirings 1 is large, this bending process requires troublesome work and a lot of man-hours.

The problem to be solved by the present invention is to solve the above problems of the prior art and to provide an external terminal block to which a large number of external wirings can be screw-connected in a narrow space when viewed from the rear side. Is.

[0006]

SUMMARY OF THE INVENTION The present invention is a terminal block provided on the rear side of an instrument, to which external wiring is screw-connected, and the external wiring screw tightening surface is parallel to the direction viewed from the rear side. is there. Further, in the present invention, the screw tightening surface is arranged in multiple stages such that it shifts outward as it goes in the depth direction when viewed from the rear side, or it is symmetrically arranged in multiple stages when viewed from the rear side, Alternatively, it is possible to select a multi-tiered arrangement that is vertically symmetrical when viewed from the back side.

[0007]

In this invention, the screw tightening surface for external wiring is
Since it is parallel to the direction viewed from the rear side, the external wiring is moved in this direction and placed on the screw tightening surface, and the screw is tightened from the direction perpendicular to the screw tightening surface. Further, in the present invention, the screw tightening surfaces are arranged in multiple steps in one direction such that they are displaced in the outer direction, for example, in the horizontal direction or the vertical direction as they go in the depth direction when viewed from the back side, or they are symmetrical or vertically symmetrical. Are arranged in multiple stages.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an external terminal block according to the present invention will be described below with reference to the perspective view of FIG. FIG.
In this regard, the point that this embodiment is different from the conventional example is that the screw tightening surface, that is, the surface of the terminal fitting, is parallel to the direction viewed from the back side. By doing so, it is possible to connect a large number of external wirings in a narrow space when viewed from the rear side, in other words, space-efficient screw connection.

Now, referring to FIG. 1, the terminal block 10 is provided on the rear side of the panel-mounted instrument case (using the mounting holes 16), and is a base 11 made of an insulating material as a basic structure. And a terminal fitting 13 with a screw tightening surface for external wiring
And mounting screws 4. The base 11 is arranged from the front side to the side facing in the figure (in the actual arrangement, in the vertical direction), and the two-step stair surface 12 is arranged symmetrically,
It is integrally formed with two types of partition walls 14 and 15 that partition adjacent stair surfaces. Note that, depending on the case, the staircase surface 12 may be arranged vertically symmetrically instead of symmetrically. In any case, when the terminal block 10 is viewed from the rear side, the stairs 12
The terminal fitting 13 is fixed to the surface parallel to the direction viewed in. The direction in which the mounting screw 4 is screwed into the screw hole formed in the terminal fitting 13 is the horizontal direction from the right side to the left side as indicated by the one-dot chain line arrow. On the other hand, the external wiring 1 is moved in the direction from top to bottom in the figure (from the front side to the other side in the actual arrangement) as shown by the solid arrow,
After placing the crimp terminal 3 on the surface of the terminal fitting 13, the mounting screw 4 tightens the screw from the right and left sides.

In this embodiment, the terminal fitting 13 to which the crimp terminal 3 is fastened and fixed is arranged in parallel with the direction viewed from the back side, so that it is narrow when viewed from the back side for connecting a large number of external wires. Space is needed, and the space efficiency of external wiring 1 is improved. In addition to this advantage, the wiring process of the external wiring 1 becomes easy. That is, even when a large number of instruments are arranged in close proximity to each other, the tip portion of the external wiring 1 introduced from the back side may remain straight. In contrast to this, in the conventional example, it was necessary to bend the tip portion at a right angle. Therefore, it is possible to eliminate troublesome work and a lot of man-hours as much as the bending process is unnecessary.

In this embodiment, however, unlike the conventional example, when the crimp terminal 3 of the external wiring 1 is positioned on the terminal fitting 13, the situation of the positional relationship thereof is slightly difficult to see. However, this problem can also be solved as follows, and it is not a drawback at all.
When the external wiring 1 is inserted straight so that the crimp terminal 3 follows the surface of the terminal fitting 13, and the tip of the crimp terminal 3 comes into contact with the surface of the staircase 12 on which the terminal fitting 13 is not fixed. , The regular positioning is completed. The contact of the tip of the crimp terminal 3 can be easily recognized by the touch of the operator.
In the figure, it seems that the crimp terminal 3 is placed on the surface of the terminal fitting 13 and then the mounting screw 4 is tightened from the right side.
It is screwed into 13. In other words, it is sufficient to loosen the mounting screw 4 a little, insert the crimp terminal 3 so as to be placed on the surface of the terminal fitting 13, and then tighten it. Therefore, the work can be performed very easily and quickly.

[0012]

According to the present invention, since the screw tightening surface for external wiring coincides with the direction viewed from the back side, the external wiring is moved in this direction and placed on the screw tightening surface, Tighten the screws from the right angle. As a result, a large number of external wirings can be screw-connected in a narrow space when viewed from the back side, and the connection work is easy.

Further, according to the present invention, the screw tightening surfaces are arranged in multiple stages in one direction such that they are displaced in the outer direction, for example, in the horizontal direction or the vertical direction as they go in the depth direction when viewed from the rear side, or Since they are arranged in a multi-tiered manner in left-right symmetry or in top-bottom symmetry, the space efficiency of the external wiring is improved, and according to the embodiment, it is approximately double that of the conventional example. Moreover, the external wiring can be left straight, and since it is not necessary to bend the end portion at a right angle, the wiring work is facilitated together with the connection work.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment according to the present invention.

FIG. 2 is a perspective view of a conventional example.

[Explanation of symbols]

 1 External wiring 2 Wiring 3 Crimp terminal 4 Mounting screw 10 Terminal block 11 Base 12 Stair surface 13 Terminal metal fittings 14, 15 Partition wall 16 Mounting hole 17 Tightening surface

Claims (4)

[Claims] 1. A terminal block provided on the rear side of an instrument, to which external wiring is screw-connected, wherein an external wiring screw tightening surface is parallel to the direction viewed from the rear side. Stand. 2. The external terminal according to claim 1, wherein the screw tightening surface is arranged in multiple stages such that the screw tightening surface shifts outward in the depth direction when viewed from the rear side. Stand. 3. The external terminal block according to claim 2, wherein the screw tightening surfaces are symmetrically arranged when viewed from the back side. 4. The external terminal block according to claim 2, wherein the screw tightening surfaces are vertically symmetrical when viewed from the back side.