JPH044367Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a terminal element structure of an assembled terminal block in which a terminal fitting is prevented from falling off when a tightening screw is in a free state.

[Prior art and its problems]

Examples of the terminal element structure of this type of assembled terminal block include Japanese Patent Application Laid-Open No. 59-54178 and Japanese Utility Model Application No. 59-66871.
The number etc. are known. However, in all of these devices, a spring is provided for each terminal fitting to prevent it from falling off in the free state (two springs are required), which increases the number of parts and takes a long time to assemble. This has the disadvantage of increasing manufacturing costs.

[Purpose of invention]

In view of the above, the object of this invention is to provide a terminal element structure of an assembled terminal block that can prevent two terminal fittings from falling off in a free state with one spring, shortens assembly time, and is inexpensive.

[Key points of the idea]

The main point of this invention is to achieve the above-mentioned purpose by using an assembled terminal block that is installed on a power distribution board or control board, and integrates the necessary number of wires via rails to connect crossover wires, internal wires, external wires, etc. between rows of panels. The base has a terminal element structure, which is made of synthetic resin and has a conductor receiver formed integrally with the partition wall between the adjacent side and separated from the center wall and a thin wall in the middle, with a connection space left and right. , a connection conductor that is removably inserted into the narrow part and has a screw hole at the corresponding position in the connection space, and has a guide groove sandwiching the center wall at the rear edge in the width direction; and a connection conductor that is guided by each of the guide grooves and connected. A terminal fitting that is movable in the vertical direction in the space and has a recess on the front side of the vertical piece, and a terminal fitting in which a thin-necked screw that is screwed into the screw hole of the connection plate is inserted in the horizontal piece, and a thin-necked screw on the central wall. = A wire spring having a central portion locked in a lower locking groove and left and right ends having symmetrical bending portions in the depth direction that engage and hold the terminal fitting in the recess in a free state. , it is possible to easily hold two terminal fittings in a free state and assemble them with one spring, thereby reducing the cost.

[Example of idea]

1 and 2 are views showing one embodiment of the terminal element structure of the terminal block according to this invention, with FIG. 1 being a front view of the terminal element, and FIG. 2 being an exploded perspective view. In the figure, the configuration of the terminal element 10 is based on a synthetic resin molded base 1 that can be installed in parallel via a rail 11.
, a connecting conductor 2 incorporated into the base 1, two terminal fittings 3 and 4, and a narrow neck screw for tightening that is rotatably inserted into each of the terminal fittings 3 and 4 with axial movement restraint. 5, 5, and a wire spring 6 that prevents the terminal fittings 3, 4 from falling off in their free states. The base 1 includes a partition wall 1a that separates one side from the adjacent side when the required number of the bases are installed in parallel, and a central wall 1c that is provided with a narrow wall 1b that protrudes on the axis of the front surface of the partition wall 1a and crosses the middle of the partition wall 1a. There are connection spaces 1d, 1d on the left and right sides of the center wall 1c, conductor receivers 1e, 1e arranged on the same level as the bottom surface of the narrow strip 1b, and a central portion of the wire spring 6 provided below the narrow strip 1b. A locking groove 1f for locking the wire spring, guide grooves 1g, 1g for wire springs provided in the axis distribution, and guide grooves 1h, 1h for terminal fittings provided on both left and right sides of the center wall 1c below the narrow diameter 1b. We are prepared. The outer periphery is provided with lower rail grooves 1i, 1i that span both front and back surfaces and communicate with each other when arranged side by side, and a groove 1K for terminal symbol cards located above the center wall 1c. . Connection conductor 2 is base 1
A thin strip 1b and a conductor receiver 1 provided on the central wall 1c of
e, 1e, and has screw holes 2a, 2a at the locations where the left and right connecting spaces 1d, 1d are located, and is guided to the rear edge in the width direction sandwiching the center wall 1c. Grooves 2b, 2b are provided. The terminal fittings 3 and 4 are L-shaped products formed by punching and bending conductive plate materials, and the vertical pieces 3a and 4a are guided by the guide grooves 2b and 2b and the terminal fitting guide grooves 1h and 1h. are recesses 3b and 4b for preventing the terminal fittings 3 and 4 from falling off in a free state.
The horizontal pieces 3c, 4c are provided with through holes coaxial with the screw holes 2a, 2a of the connecting plate 2, and these through holes have narrow neck screws 5, 5 for tightening as described above. is rotatable and fitted with axial movement restraint. The wire spring 6 is formed by bending a spring wire, and the top side is locked in the locking groove 1f, and both legs are directed downward to form a hairpin shape. A locking portion 6a, bending pieces 6b extending from both leg ends of the locking portion 6a and rising up in the depth direction to form an L-shape;
It is provided with engaging pieces 6c, 6c which are extended from the ends of the terminal fittings 3, 4 to the left and right and can be engaged with the recesses 3b, 4b in the free state of the terminal fittings 3, 4, and the rising portions of the flexible pieces 6b, 6b are formed by lines. It is guided within the spring guide grooves 1g, 1g.

It goes without saying that the shape of the wire spring 6 and the locking and engaging means are not limited to these.In short, any shape that presses the vertical pieces 3a, 4a of the terminal fittings 3, 4 against the front side of the partition wall 1a may be used. Bye.

In this embodiment with the above configuration, when connecting the electric wires 12 and 13 shown by chain lines to the connecting conductor 2 on the base 1, both ends of the connecting conductor 2 (the connecting space 1d,
Insert the electric wire 1 into the corresponding position of the screw hole 2a, 2a of 1d).
The wires 12 and 13 are connected to each other via the connecting conductor 2 by inserting the ring-shaped connection ends 2 and 13 and twisting them while pushing the tightening screws 5 and 5 with a screwdriver. . Then, when the tightening screws 5, 5 are loosened and the tightening screws 5, 5 are removed from the screw holes 2a, 2a of the connecting conductor 2 and become free, the engaging pieces 6c, 6c of the wire spring 6 are attached to the terminal fitting. 3, 4 recesses 3b, 4
b to prevent it from falling off. Therefore, during wiring work, the terminal fittings 3 and 4 do not fall off in the free state, so the work efficiency is not reduced, and moreover, it is possible to prevent the terminal fittings 3 and 4 from falling off using only one wire spring 6. This reduces the number of parts and assembly time.

[Effect of idea]

According to this invention, it is possible to prevent two terminal fittings from falling off in their free state by using one wire spring, without impairing wiring workability.
The number of parts and assembly time are reduced, and a terminal element structure of an inexpensive assembled terminal block can be provided.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the terminal element structure of the assembled terminal block according to this invention, with FIG. 1 being a front view of the terminal element, and FIG. 2 being an exploded perspective view. 1... Base, 1a... Partition wall, 1b... Thin,
1c... Central wall, 1d... Connection space, 1e... Conductor holder, 1f... Locking groove, 2... Connection conductor, 2a...
...Screw hole, 2b...Guide groove, 3, 4...Terminal fitting, 3a, 4a...Vertical piece, 3b, 4b...Recess,
3c, 4c...Horizontal piece, 5...Narrow neck screw, 6...Wire spring, 10...Terminal element, 11...Rail.

Claims (1)

[Scope of utility model registration request] It is a terminal element structure of an assembled terminal block that is installed on a distribution board or control board, etc., and uses the necessary number of interconnections, internal wires, external wires, etc. between rows of boards as one unit via a rail, and the adjacent terminals are made of synthetic resin. a base having a central wall formed integrally with the partition wall for the element and having a narrow hole in the middle, a base having conductor receivers arranged with a connection space on the left and right sides of this central wall, and a base that is removably inserted into the narrow wall and said connection. a connecting conductor having a screw hole at the position in the space and a guide groove sandwiching the center wall on the rear edge in the width direction; and a vertical piece that is guided by each of the guide grooves and is movable vertically within the connection space. A terminal fitting having a recess on the front side and having a narrow-necked screw fitted into the screw hole of the connection plate in the horizontal piece, and a center portion thereof being locked in a locking groove in the narrow lower part of the center wall. A terminal element structure of an assembled terminal block, characterized in that the left and right ends of the wire spring have symmetrical bending parts in the depth direction that engage and hold the recess in the free state of the terminal fitting. .