JPH0217428Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a socket, and particularly to the structure of a socket used in the output section of a sequence controller.

(Conventional technical problems) Conventionally, relays have been used in the output section of sequence controllers, and in this case, relays are often single-pole, or multiple relays are often used together. In order to mount these relays, a socket as shown in Fig. 4 is used.Socket A' consists of a main body 1' and a base 2', and the upper surface of the base 1a' of the main body 1' is Base 3 of relay 3'
Insertion holes 1'b, 1' for normally open contact terminal 3'b, common terminal 3'c, and coil terminal 3'd protruding from a'
A plurality of terminal blocks 1'c and 1'd are formed on one side wall of the base 1'a, and a terminal block 1'g formed in two stages is formed on one side wall of the base 1'a. A common terminal fitting 7' having a terminal receiving part (not shown) provided at the lower part of the hole 1'c connects the base 7'a between the terminal screw 4' and the terminal screw receiving part (not shown). At the lower stage, a terminal fitting 7'' having a terminal receiving part (not shown) provided at the lower part of the insertion hole 1'b connects the base 7''a to the terminal screw 4'. and a terminal screw holder (not shown), and both side walls of the base 1'a, that is, the lower side walls of the terminal block 1'g and the terminal block 1'g are formed. A plurality of protrusions 1'j are provided on the side wall on the side that is not attached, and each protrusion 1'j has a plurality of mounting pieces 2'g provided on both sides of the base 2'a of the base 2'. A socket A' is formed by fitting the fitting portion 2'f of the socket A'.

When using the socket A′ formed as described above for the output section of a sequence controller,
Since the same power source is often used for output, the common terminal fittings 7' corresponding to the common terminals 3'c are commonly used by connecting them with electric wires.

However, if socket A′ is as described above,
Since a common terminal fitting 7' for the common terminal 3'c and a terminal fitting 7'' for the normally open contact terminal 3'b are required,
The number of parts increases, which increases costs, and
Forming a two-stage terminal block 1'g for the normally open contact terminal and the common terminal increases the size and makes the installation space uneconomical. Since the terminals 7' are commonly connected by electric wires, there is a drawback that the crossover wiring work becomes complicated.

(Purpose of the invention) This invention was proposed to solve the above-mentioned drawbacks, and it enables miniaturization of the product, reduces the number of parts, and lowers the cost. The purpose of this invention is to provide a socket for a sequence controller that can simplify the crossover wiring.

(Embodiment of the invention) This invention will be described below based on an embodiment shown in FIGS. 1 to 3.

The main body 1 is made of a resin material, and the base 1a has an insertion hole 1 on the top surface for a normally open contact terminal 3b of the relay 3.
b, insertion hole 1c for common terminal 3c, coil terminal 3
A plurality of insertion holes 1d for d are formed respectively, and a terminal block 1g is formed on one side wall of the base 1a, and a terminal block 1g is formed at a certain interval on the other side wall and the side wall of the terminal block 1g. A plurality of protrusions 1j are formed.

An insertion guide portion 1e having a substantially square cross section for the connection terminal 6 is formed at the lower peripheral edge of each insertion hole 1d, and an insertion guide portion 1e having a roughly square cross section for the terminal fitting 7 is formed at the lower peripheral edge of each insertion hole 1b. A guide portion 1f is formed.

A plurality of barriers 1h are formed at regular intervals on the terminal block 1g, and guide grooves 1i for the terminal screw receiving fittings 5, the terminal fittings 7, and the common terminal fittings 8 are formed in the lower part of the side wall of the barriers 1h. Further, a plurality of protrusions 1j are formed on the outer wall of the terminal block 1g, corresponding to the protrusions 1j on the other side wall of the base 1a.

The base 2 is made of a resin material, and the base 2a has a plurality of insertion holes 2d for the connection terminals 6 formed on one side, and a terminal receiving part 8b for the common terminal fitting 8 in the center. A plurality of pedestals 2c are formed for the terminal fitting 7, and a lead-out plate 7c for the terminal fitting 7 is formed on the other side
A plurality of holders 2e for the terminal screw holder 5 are formed, and a mounting piece 2g having a fitting portion 2f is connected to the protrusion 1j on both sides of the main body on both sides of the pedestal 2a. A plurality of them are formed correspondingly.

The base 2 is attached to the main body 1 by aligning the mounting pieces 2g with the protrusions 1j of the main body 1 and fitting the protrusions 1j into the fitting portions 2f.

The relay 3 is a single pole, and has a normally open contact terminal 3b on a base 3a, a common terminal 3c with a contact (not shown) at the upper end, and a coil terminal 3d, which are partially exposed. Open contact terminal 3b and insertion hole 1
b, the common terminal 3c and the insertion hole 1c, and the coil terminal 3c and the insertion hole 1d are inserted into the main body 1 so as to correspond to each other.

4 is a terminal screw, which is attached to the base 5a of the terminal screw holder 5.
is screwed onto.

The terminal screw holder 5 has a substantially round-shaped cross section, and the base 5a has a screw hole 5c formed in the center thereof, into which the terminal screw 4 is screwed, and a hanging piece on one opposite side. 5b, 5b are formed, and protrusions 5d, 5d are formed on the other opposing side piece.

The terminal screw holder 5 has protrusions 5d, 5d connected to the main body 1.
The hanging pieces 5 are inserted into the guide grooves 1i, 1i of the opposing barriers 1h, 1h of the terminal block 1g.
b, 5b are placed on pedestals 2e, 2e of the base 2.

The connection terminal 6 consists of a terminal receiving part 6b that receives the coil terminal 3d of the relay 3 and a lead piece 6a to which the power line is connected, and the terminal receiving part 6b is inserted into the lower peripheral edge of the insertion hole 1d of the base 1a. Guide part 1
e, and the lead piece 6a is inserted into the insertion hole 2d of the base 2.

The terminal fitting 7 is made of a conductive material and is attached to the base 7a.
A through hole 7d through which the terminal screw 4 is inserted is formed in the center, and protrusions 7e, 7 are formed on one opposing side.
e is formed, and a lead-out plate 7c is formed on one of the other opposing sides, and this lead-out plate 7
A terminal receiving portion 7b of the normally open contact terminal 3b of the relay 3 is formed at the tip of the terminal c.

The terminal fitting 7 is constructed by positioning the base 7a on the top surface of the terminal screw receiving fitting 5 and inserting the protrusions 7e, 7e into the guide grooves 1i, 1i of the barriers 1h, 1h of the terminal block 1g, while the terminal receiving part 7b is inserted into the guide grooves 1i, 1i of the barriers 1h, 1h of the terminal block 1g. Insertion hole 1b of base 1a
The guide plate 7c is inserted into the insertion guide part 1f at the peripheral edge of the lower surface of the base 2, and the guide plate 7c is placed on the holder 2b of the base 2.

The common terminal fitting 8 is made of a conductive material, and the base 8a has a through hole 8 in the center thereof through which the terminal screw 4 is inserted.
d is formed, and a protrusion 8 is formed on one opposing side.
e, 8e are formed, and a lead-out plate 8c is formed on one of the other opposing sides, and this lead-out plate 8c has terminals equal to the number of insertion holes 1c formed in the base 1a. The money receiving part 8b is integrally formed,
The terminal receiving portions 8b are provided at predetermined intervals so as to be located below the insertion hole 1c of the base 1a.

The common terminal fitting 8 is constructed by positioning the base 8a on the top surface of the terminal screw holder 5 and connecting the protrusions 8e and 8e to the terminal block 1.
Barrier 1h on the left end side of g, guide groove 1 of 1h
i, 1i and insert the terminal receiving parts 8b into the bases 1a, respectively.
The guide plate 8c is positioned below the insertion hole 1c of the base 2, and a guide plate 8c is placed on the protrusions 2c, 2c of the base 2.

(Effect of the invention) As explained above, the common terminal fitting is formed by disposing it in the socket, in which the terminal receiving part, which is arranged corresponding to the insertion hole for each common terminal, is integrally formed on the lead-out plate. , the number of terminal fittings used for common terminals is reduced, resulting in significant cost reductions, and
Since the common terminal fitting and the terminal fitting can be placed on the same terminal block, the socket can be made smaller and the installation space can be used more effectively.Furthermore, the terminal receiving part for the common terminal can be integrated into the lead-out plate. This has the practical effect of being able to omit the crossover wiring for common connection.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of this invention, Fig. 2 is a partially omitted cross-sectional side view showing the arrangement of terminal fittings, and Fig. 3 is a similar arrangement of common terminal fittings. FIG. 4, a partially omitted cross-sectional side view showing the state, is a perspective view of the conventional example. 1...Socket, 1a...Base, 1b, 1c,
1c...Insertion hole, 1e, 1f...Insertion guide part,
1g...terminal block, 1h...barrier, 1i...guide groove, 1j...protrusion, 2...base, 2a...base, 2b, 2c, 2e...cradle, 2d...insertion hole, 2f ...Mating part, 2g...Mounting piece, 3...Relay, 3a...Base, 3b...Normally open contact terminal,
3c... Common terminal, 3d... Coil terminal, 4...
Terminal screw, 5...Terminal screw holder, 5a...Base, 5b...Descent piece, 5c...Screw hole, 5d...
Projection, 6... Connection terminal, 6a... Lead piece, 6b
...Terminal receiving part, 7...Terminal metal fitting, 7a...Base, 7b...Terminal receiving part, 7c...Leading plate, 7d
...Through hole, 7e...Protrusion, 8...Common terminal fitting,
8a...Base, 8b...Terminal holder, 8c...Leading plate, 8d...Through hole, 8e...Protrusion.

Claims (1)

[Claims for Utility Model Registration] A plurality of insertion holes for relay contact terminals, a plurality of insertion holes for common terminals, and a plurality of insertion holes for coil terminals are formed on a base, and a terminal block is provided on one side of the base. A main body, a terminal fitting disposed with the base mounted on the terminal block and a terminal receiving part positioned in the contact terminal insertion hole, and a common terminal receiving part arranged with the base mounted on the terminal block. a common terminal fitting disposed in the common terminal insertion hole; a connection terminal disposed in the coil terminal insertion hole with a terminal receiving part positioned in the coil terminal insertion hole;
A socket having a base disposed at the lower part of the main body, wherein a lead-out plate is formed on the base, and a plurality of common terminal receiving portions are integrally formed on the lead-out plate at regular intervals to form a common terminal fitting. and the common terminal fitting is formed by positioning the base on the terminal block of the main body and positioning each of the common receiving parts in the respective common terminal insertion holes of the main body. A socket for a sequence controller characterized by: