JPH04324267A - Terminal base - Google Patents

Abstract

PURPOSE:To shorten a manhour for internal wiring work of electric wires to reduce cost of internal wiring and to attain possible wiring connection to other terminal metal fixture of up to three by previously mounting the electric wire inserted for use of a power supply or a signal bus to the predetermined terminal metal fixture. CONSTITUTION:A terminal metal fixture 1 is provided with a seat part 2 inserted by an external wiring mounting screw and a connection part 3 having a groove 4 for introducing an electric wire pressed in and insertion-mounted, and the electric wire, previously introduced into the groove 4, is pressed in and insertion-mounted to the groove 4 simultaneously with press-fit fixing to a terminal base block of the metal fixture 1. The groove 4 is formed as a hollow part, where an an electric wire introducing part 4a in an opening side communicates with electric wire insertion- mounting part 4b in a dead end side, and also the terminal base block has a groove for introducing the electric wire in a position corresponding to the part 3 of the press- fit fixed metal fixture 1. Further, a point end part of the part 3 can be brought into contact with an conducted to a wiring plate pattern. In this way, the electric wire for use of a power supply or a signal bus can be previously insertion-provided, so that T-shaped branch connection can be performed while cost can be reduced by shortening a labor time for internal wiring.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention provides a method in which, when a predetermined terminal fitting is press-fitted into a terminal block, an electric wire for a power supply or a signal bus is inserted into the terminal fitting in advance. The present invention relates to a terminal block that can reduce the number of man-hours involved in internal wiring work, thereby reducing the cost of internal wiring, and also allows for T-shaped branch connections.

0002

2. Description of the Related Art Conventionally, when connecting a power supply or signal bus electric wire to an electronic device such as a programmable controller (hereinafter referred to as a PC), a crimp terminal is attached to the electric wire, and the electric wire is connected to the PC via the crimp terminal. A method is adopted in which the terminals are fixed with screws to the specified terminal fittings of the terminal block.

0003

[Problem to be solved by the invention] In the conventional wire connection method, when multiple PCs are installed in parallel (system configuration
(In many cases, multiple PCs are installed in parallel), each P
It takes a lot of man-hours to connect the common power supply or signal bus wires to the
Since only up to two other wires can be connected, it is not possible to connect three wires, ie, a T-shaped branch connection, which is inconvenient in terms of system configuration.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to solve the internal wiring work of the electric wires by inserting the electric wires for power supply or signal bus into predetermined terminal fittings in advance. It is an object of the present invention to provide a terminal block that can reduce the number of man-hours involved, thereby reducing the cost of internal wiring, and further allows connection of up to three other wires to this terminal fitting.

[0005]

[Means for Solving the Problems] In order to solve this problem, a terminal block according to claim 1 is a terminal block in which an electric wire is inserted in advance into a predetermined terminal fitting, the terminal fitting being connected to an external The terminal block of the terminal fitting includes a seat portion through which a wiring mounting screw passes, and a connecting portion having a groove into which the electric wire is introduced and inserted by pushing. It is configured to be press-fitted into the groove of the connecting portion at the same time as being press-fitted and fixed to the block. The terminal block according to claim 2 is the terminal block according to claim 1, in which the groove of the connection part serves as a hollow part where the electric wire introduction part on the opening side and the electric wire insertion part on the dead end side communicate with each other. It is formed. According to a third aspect of the present invention, there is provided a terminal block according to the first or second aspect, in which the terminal block has a groove into which an electric wire is introduced at a position corresponding to a connecting portion of a terminal fitting to be press-fitted and fixed. A terminal block according to a fourth aspect of the present invention is the terminal block according to any one of the first to third aspects, wherein the tip of the connecting portion of the terminal fitting is configured to be able to come into contact with the printed wiring board pattern and be electrically conductive.

[0006]

[Operation] In the terminal block according to any one of claims 1 to 4, the electric wire introduced into the groove of the connection part in advance is pushed into the groove of the connection part at the same time as the predetermined terminal fitting is press-fitted and fixed to the terminal block. inserted. In particular, in the terminal block according to claim 2,
An electric wire is introduced from the electric wire introduction part on the opening side of the groove of the connection part, and is similarly inserted into the electric wire insertion part on the dead end side of the groove. In particular, in the terminal block according to the third aspect, the electric wire is introduced through a groove provided in the terminal block block, and the wire is connected to the connecting portion of the terminal fitting. In particular, in the terminal block according to the fourth aspect of the present invention, the terminal fitting is connected by contact and conduction with the pattern of the printed wiring board as an internal unit through the tip portion of each leg of the U-shape.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the terminal block according to the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view of the embodiment with electric wires inserted. In FIG. 2, reference numeral 10 denotes a terminal block as an example, which belongs to a PC, and two of these PCs are installed in parallel. Each terminal block 10 mainly consists of six common terminal blocks 5 and terminal fittings 1 with mounting screws 6. 8 is an electric wire, for example for power supply or signal bus,
It is introduced through the groove 5a of the terminal block 5 and inserted into a predetermined terminal fitting 1 as will be described in detail later. In addition, electric wire 8
Although the corresponding terminal fittings are determined depending on the system configuration, all terminal fittings are unified into the same terminal fitting 1 for convenience in manufacturing and application.

FIG. 1 is a perspective view of a terminal fitting. In FIG. 1, a terminal fitting 1 is, roughly speaking, a plate-like member bent into a U-shape, and consists of a seat portion 2 at the bottom thereof, and connection portions 3 corresponding to each leg thereof. In the seat part 2,
A screw hole 2a is drilled, and an external wiring is screw-connected using a mounting screw (not shown). Each connecting portion 3 consists of an elastic contact portion 3a at the tip, a groove 4 at the middle, and a retainer 3b at the base. The groove 4 is composed of an electric wire introduction part 4a having a wide opening and a narrow electric wire insertion part 4b having a dead end part. As shown in FIG. 2, the terminal fitting 1 is
It is press-fitted into the terminal block 5, and at the same time, the electric wire 8
is inserted. The press-fitting and fixing of the terminal fitting 1 into the terminal block 5 and the insertion and attachment of the electric wire 8 will be described next.

FIG. 3 relates to the process of inserting the electric wire into the terminal fitting, where (a) is a side view before the electric wire is introduced into the terminal fitting, and (b) is a side view of the electric wire being inserted into the groove of the terminal fitting. The front side view (c) is a side view when the electric wire is inserted into the terminal fitting. (1) In FIG. 3(a), the terminal fitting 1 is press-fitted into the terminal block 5 from above to below, leaving a slight margin. This allowance is for inserting the electric wire 8 into the terminal fitting 1 in a later process. A triangular protrusion stopper 3b functions to prevent the terminal fitting 1 from coming off when it is press-fitted into the terminal block 5. Next, the electric wire 8 shown in cross section is inserted into the groove 5a (see FIG. 2) of the terminal block 5 in the direction of the upward arrow. Reference numeral 5b is a seat surface, which is a flat portion that continues deep into the groove 5a. (2) In FIG. 3(b), the electric wire 8 is inserted in the direction of the arrow and takes a position where it is placed on the seat surface 5b of the terminal block 5 at the end of the introduction part 4a of the terminal fitting 1. The insertion portion 4b of the terminal fitting 1 is located above it. (3) In FIG. 3(c), the terminal fitting 1 is further press-fitted by removing the above-mentioned margin, and in the process, the electric wire 8 is compressed laterally into the narrow insertion part 4b of the terminal fitting 1. At the same time, the cover is torn and inserted. The terminal fitting 1 is completely prevented from coming off the terminal block block 5 by the stopper 4b.

FIG. 4 is a perspective view of the main parts when the terminal fitting contacts and conducts with the printed wiring board pattern. In FIG. 4, the printed wiring board 9 is inserted upward from below the contact portion 3a of the terminal fitting 1, and the contact portion 3 is inserted into the pattern 9a.
a is positioned in such a way that they are in contact with each other. The left and right contact portions 3a of the terminal fitting 1 press and contact the patterns on both sides of the printed wiring board 9, respectively. Therefore, up to three internal and external connecting members can be connected to the terminal fitting 1 via each contact portion 3a and the mounting screw 6, in addition to the electric wire 8 mentioned above. This enables a so-called T-type branch connection.

[0011]

In the terminal block according to any one of claims 1 to 4, the electric wire introduced in advance into the groove of the connection part can be inserted into the groove of the connection part at the same time as the predetermined terminal fitting is press-fitted into the terminal block. It is inserted by pushing it into the

[0012] Therefore, especially electronic devices such as PCs
When installing PCs adjacent to each other, common electric wires such as power supply or signal bus electric wires can be inserted in advance to be connected to the designated terminal fittings on the terminal block of each PC. Therefore, the number of man-hours required for internal wiring can be significantly reduced, and thus costs can be reduced. Further, in particular, according to claim 3, the electric wire can be introduced through the groove of the terminal block, and according to claim 4, the connection with the internal unit can be easily made, so that a so-called T-shaped branch connection is possible.

[Brief explanation of drawings]

[Fig. 1] A perspective view of a terminal fitting according to an embodiment of the present invention.

[Figure 2
] Perspective view of the example with electric wires inserted

[Figure 3] Regarding the process of inserting the electric wire into the terminal fitting, (a) is a side view before the electric wire is introduced into the terminal fitting, and (b) is a side view before the electric wire is inserted into the groove of the terminal fitting. Side view, (c) is a side view when the wire is inserted into the terminal fitting.

[Figure 4] A perspective view of the main parts when the terminal fitting contacts and conducts with the printed wiring board pattern

[Explanation of symbols]

1 Terminal fittings 2 Seat part 2a Screw hole 3 Connection part 3a Contact part 3b Retainer 4 Groove 4a Introduction 4b Insertion part 5 Terminal block 5a Groove 5b Seat surface 6 Mounting screw 8 Electric wire 9 Printed wiring board 9a pattern 10 Terminal block

Claims (4)

[Claims] 1. A terminal block in which an electric wire is inserted in advance into a predetermined terminal fitting, the terminal fitting having a seat portion through which a mounting screw for external wiring passes, and into which the electric wire is introduced and inserted by pushing. a connecting part having a groove, and the electric wire introduced in advance into the groove of the connecting part is pushed into and inserted into the groove of the connecting part at the same time as the terminal fitting is press-fitted and fixed to the terminal block. A terminal block characterized by: 2. In the terminal block according to claim 1, the groove of the connection part is formed as a hollow part in which the electric wire introduction part on the opening side and the electric wire insertion part on the dead end side communicate with each other. A terminal block featuring: 3. The terminal block according to claim 1, wherein the terminal block has a groove into which an electric wire is introduced at a position corresponding to a connecting portion of the terminal fitting. 4. The terminal block according to any one of claims 1 to 3, wherein the terminal fitting is configured such that the tip end of the connecting portion thereof can come into contact with the printed wiring board pattern and be electrically conductive. terminal block.