JPH037032Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a terminal block having a wire end of an electric wire or a clamping part for a terminal.

[Conventional technology]

As a conventional terminal block, there is one shown in FIG. 8, for example.

That is, the terminal block 1 is provided with a gap for holding the terminal between the terminal plate 3 fixed to the block body 2 and the movable terminal 4, and the movable terminal 4 is approximately U-shaped, and the back side of the upper surface A nut 5 is fixedly attached to the base body 2 and a bolt 6 inserted through the terminal plate 3 is biased in the protruding direction by a spring 7, while a movable terminal 4 is biased by a spring 8.
and is biased in a direction to widen the gap.

When bolt 6 is not screwed into nut 5,
As shown in the left half of FIG. 8, a large gap is formed between the terminal plate 3 and the movable terminal 4 due to the biasing forces of the springs 7 and 8, and the bolt 6 is pushed in and screwed into the nut 5. , 8, the terminal plate 3 and the movable terminal 4 come into pressure contact and clamp the end of the electric wire or the terminal.

In this terminal block 1, the tip of the bolt 6 is held completely apart from the movable terminal 4 when connecting electric wires,
At this time, a large open space is formed between the terminal plate 3 and the movable terminal 4, so that even round terminals can be easily connected, thereby improving workability.

[Problems to be solved by the invention] However, although the conventional terminal block 1 has significantly improved workability, the movable terminal 4 is purposely provided and biased by the spring 8, and the bolt The spring 7 that biases the terminal block 6 is a conical coil spring so as not to directly receive pressure contact force, and has a complex structure.As a result, not only is the terminal block expensive, but it is also difficult to reduce the size and weight of the terminal. There was a problem with it becoming a stand.

Further, the bolt 6 is biased in the protruding direction by a spring 7, so that when the bolt 6 is loosened,
This loosening tends to increase, and there is a risk that the gap between the terminal board 3 and the movable terminal 4 will further widen, and eventually the ends of the wires will not be able to be clamped sufficiently, resulting in poor contact. There was a problem that this could occur.

The present invention was developed by focusing on these conventional problems.It has a simple structure, is inexpensive, small and lightweight, and can securely clamp the ends of electric wires. The purpose is to provide terminal blocks.

[Structure of the idea]

The gist of the present invention to achieve such an object is that, in a terminal block having a wire end or terminal clamping part, a terminal plate is fixed below the middle part of the base body, and a terminal block is fixed to the terminal block. A screw hole is threaded, and a clamping screw that is screwed into the screw hole is arranged above the screw hole, and the clamping screw is guided so as to be movable in the vertical direction and is held so that it does not slip out upward. a guide groove is formed in the base body, a resilient member is disposed on the upper part of the base body at a position adjacent to the inner side wall of the guide groove and above the terminal board, and the resilient member is provided with a guide groove that It elastically protrudes into the guide groove from the inner side wall of the guide groove, urges the clamping screw upwards just before it comes off from the screw hole, and generates a push-up force when fastening the clamping screw to the terminal plate. A retractable leg part is provided at a position where no interference occurs and no interference occurs, and when the leg part of the elastic member pushes up the clamping screw that has come out of the screw hole, the gap through which the end of the electric wire or the terminal is inserted is provided. The terminal block is characterized in that the clamping portion is set so as to be formed between the tip of the clamping screw and the terminal plate.

[Effect]

Before the terminal or wire end is clamped, the legs of the resilient member push up the clamping screw, and a large gap for insertion is formed between the tip of the clamping screw and the terminal plate. There is.

Insert a terminal, etc. into the gap, push the clamping screw while guiding it into the guide groove against the elastic force of the resilient member, and screw the clamping screw into the screw hole of the terminal board with the terminal, etc. in between. When the terminals and the like are tightened, the terminals and the like are clamped between the clamping screws and the terminal plate.

At the time of clamping, the legs of the resilient member retreat to the inner side wall of the guide groove so as not to interfere with the clamping screw. When retracted, the legs only push the clamping screw from the side, and no upward force is generated, so that the clamping screw does not loosen and the terminal etc. are securely clamped.

When the clamping screw is loosened from the clamping state, the clamping screw rises, and before the clamping screw is removed from the screw hole of the terminal board, the leg of the elastic member protrudes into the guide groove.
The legs urge the locking screw in an upward direction.

When the clamping screw is removed from the screw hole, it rises due to the biasing force of the legs of the resilient member and is restrained so that it does not slip out upwards, and the terminal, etc. is inserted between the tip of the clamping screw and the terminal plate as described above. A gap is formed for insertion.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 6 show a first embodiment of the present invention.

The terminal block 10 according to this embodiment is shown in FIGS.
As can be seen in the figure, a pedestal unit 20 with a similar structure
a, 20b... are arranged on the combination rail 11,
Both ends are held down by presser brackets 12, 12 and held together.

Since the base units 20a, 20b, . . . have similar structures, only one of them will be explained, and the same reference numerals will be given to the similar parts of the others, and the explanation thereof will be omitted.

FIG. 1 shows a cross section of the base unit 20a, the base body 30 of which is comprised of a partition wall 31 and a base 32 supporting it. The partition wall 31 may be configured separately from the base portion 32 in some cases.

The lower part of the base 32 has a shape that fits into the combination rail 11, and a terminal plate 40 is fused and fixed to the center part 33 of the base 32, and screw holes 41 are provided at both ends of the terminal plate 40. , 41 are screw-engraved.

Attachment screws 50 are placed above facing the screw holes 41, 41,
Guide grooves 60, 60 are provided on both sides of the upper part of the base 32 to allow the clamping screws 50, 50 to move in the vertical direction. An elastic member 70 that can be locked is provided. The terminal plate 40, the clamping screw 50, the guide groove 60, and the elastic member 70 constitute a clamping part.

A guided member 51 is fitted into the neck of the clamping screw 50 . The guided member 51 is formed into a substantially U-shape. The guided member 51 has a seat portion 51c and a seat portion 5.
It has both side parts 51a and 51b extending upward from both sides of 1c. Both sides 51a,
51b is formed such that the distance between them widens upward.

The guide groove 60 has a side wall 61a on the center side of the base body 30 and a side wall 61b on the outside of the base body 30. The side walls 61a, 61b are the tips of both side parts 51a, 51b of the guided member 51 of the clamping screw 50 and the seat part 5.
It is formed in contact with or with a slight gap between both ends of 1c.

A side wall 61a of the guide groove 60 has an entrance/exit hole 62 formed at a predetermined position. The guide groove 60 has an opening 63 at an upper position. The opening 63 is formed with an opening width that allows the tips of the side parts 51a and 51b of the guided member 51 to come into contact so that the clamping screw 50 does not slip out upward.

Side walls 61a, 61 on the center side of the guide grooves 60, 60
An elastic member 70 is held between the parts a. The resilient member 70 is formed symmetrically. The elastic member 70 has two leg parts 71 separated from a connecting part 72.
A compression spring 73 is provided between them. Elastic member 70
The legs 71 and the connecting parts 72 are made of plastic material. The leg portions 71 and the connecting portions 72 of the resilient member 70 may be made of a metal material.

The leg portion 71 of the resilient member 70 extends downward in an arc shape. Legs 71, 71 of elastic member 70
A compression spring 73 is held between the tips of the . The leg portion 71 of the resilient member 70 is biased by a compression spring 73 so as to be able to protrude into the guide groove 60 from the entrance/exit hole 62 of the side wall 61a.

A push-up portion 71a is provided at the tip of the leg portion 71 of the elastic member 70. The push-up portion 71a is for urging the clamping screw 50 upward.

As can be seen from FIG. 6, the portion pushed up by the push-up portion 71a of the leg portion 71 of the resilient member 70 is the seat portion 51c of the guided member 51 of the clamping screw 50.
The corner portion 51 rising from the side portions 51a, 51b
It is d. Push-up portion 7 of leg portion 71 of elastic member 70
1a is formed so that the corner 51d of the guided member 51 of the clamping screw 50 immediately before coming off from the screw hole 41 can be pressed upward by the biasing force of the compression spring 73.
Furthermore, when the clamping screw 50 is fastened to the screw hole 41 of the terminal board 40, the vicinity of the push-up portion 71a of the leg portion 71 is retracted to a position on the inner side wall 61a side where no push-up force is generated and there is no interference. It is arranged so that it is possible.

As can be seen from FIG. 1, a resilient locking portion 71b is provided at the base of the leg portion 71 of the resilient member 70. As shown in FIG. The elastic locking portion 71b of the leg portion 71 is connected to the clamping screw 50.
This is to lock it in the upper position. Leg 7
The first resilient locking portion 71b projects into the guide groove 60 by the biasing force of the compression spring 73, and is formed to be able to lock the corner portion 51d of the clamping screw 50. A predetermined gap is formed between the threaded portion 53 of the clamping screw 50 locked in the upper position and the terminal plate 40.

As shown in FIGS. 1 and 6, the elastic member 7
The connecting portion 72 of No. 0 is formed by connecting upper end portions extending along the side walls 61a, 61a.

The upper part of the connecting part 72 is fitted into the fitting groove 33 at the center of the upper part of the base part 32.

As is clear from FIG. 6, a positioning protrusion 72a is provided at the lower part of the connecting portion 72 of the resilient member 70. The positioning protrusion 72a of the connecting portion 72 is formed so as to be able to come into contact with the upper edge 62a of the opening 62 of the side wall 61a. Positioning protrusion 72 of connecting part 72
a is for positioning the legs 71 of the elastic member 70 in the opening direction.

As can be seen from FIG. 1, relief grooves 34, 34 are provided at the bottom of both sides of the base 32. base 3
The relief groove 34 of No. 2 is used to hold the clamping screw 50 in the clamped state.
It is formed with a certain gap so as not to interfere with the threaded portion 53 of.

As shown in FIG. 5, the end of the electric wire A connected to the terminal block 10 has a wire end A1 shown in FIG. 4a, a round terminal A2 shown in FIG. 4b, and a fork terminal shown in FIG. 4c. A type terminal A3 and the like are provided.

Notches 31a, 31a are formed on both shoulders of the partition wall 31, and the cover 35 is cut out as necessary, as shown in FIG.
It is designed so that it can be fitted.

Next, the action will be explained.

Before connecting the electric wire A, as seen in the right half of FIG. It is locked. In addition, the clamping screw 50
does not escape upward due to the opening 63 of the guide groove 60. Further, the clamping screw 50 has a guide groove 6
By the side walls 61a and 61b of 0, the guided member 51
It is held in the upper position in FIG. 1 without moving through. In this state, a large gap is formed between the tip of the threaded portion 53 of the clamping screw 50 and the terminal plate 40.

Next, the wire end A1 of the electric wire A, the round terminal A2, the fork terminal A3, etc. are inserted into this gap. Since the round terminal A2 cannot be attached unless the threaded portion 53 of the clamping screw 50 is removed from the threaded hole 41 of the terminal board 40, the presence of the gap is particularly significant. The case where the round terminal A2 is attached will be explained.

The round terminal A2 is inserted so that its center hole is located directly below the threaded portion 53 of the clamping screw 50. Hook the tool onto the head 52 of the clamping screw 50 and press the resilient member 70.
The elastic locking portion 71b of the leg portion 71 is pushed in against the biasing force of the compression spring 73. The leg portion 71 of the resilient member 70 is connected to the corner portion 5 of the guided member 51 of the clamping screw 50.
1d and enters the side wall 61a of the guide groove 60.

The push-up portion 71a of the leg portion 71 of the elastic member 70 is
Press the corner 51a of the guided member 51. The biasing force of the compression spring 73 pushes up the guided member 51 and moves the side 51b of the guided member 51 opposite to the side 51a and the end of the seat 51c into the guide groove 6.
0 side wall 61b. The guided member 51 is held and guided by the guide groove 60 on both sides 51a and 51b. Thereby, the clamping screw 50 moves in the direction of the screw hole 41 of the terminal plate 40 without the tip of the threaded portion 53 swinging.

Furthermore, the clamping screw 50 is pushed in against the biasing force of the compression spring 73. Threaded portion 53 of clamping screw 50
Insert the tip of the terminal A2 into the center hole of the terminal plate 40.
It comes into contact with the screw hole 41 of. Even in this state,
The push-up portion 71a of the leg portion 71 of the resilient member 70 presses the guided member 51 of the clamping screw 50. The clamping screw 50 is stable without wobbling.

Turn the clamping screw 50 with a tool. The threaded portion 53 of the clamping screw 50 is completely screwed into the threaded hole 41 of the terminal plate 40. Furthermore, the clamping screw 50 is rotated using a tool. The round terminal A2 is clamped between the seat portion 51c of the guided member 51 of the clamping screw 50 and the terminal plate 50. As seen in the left half of FIG.
Both side portions 51a of are pressed in the horizontal direction. Do not press upward on both sides 51a of the guided member 51 of the clamping screw 50. That is, the clamping screw 50 will not loosen.

In the case of the wire end A1 and the fork type terminal A3, it is not necessarily necessary to form a large gap between the threaded portion 53 of the clamping screw 50 and the terminal plate 40, but it is possible to improve workability by making the gap larger. I can do it.

When removing the end of the electric wire A, loosen the fastened clamping screw 50. When the clamping screw 50 is loosened, the guided member 51 of the clamping screw 50 moves into the guide groove 60.
Move upward while being guided by. Guided member 5
One side 51a of the elastic member 70 is connected to the leg 7 of the elastic member 70.
Pressed to 1. The other side 5 of the guided member 51
1b moves while being pressed against the side wall 61b of the guide groove 60.

Furthermore, loosen the clamping screw 50. Clamping screw 5
0 moves upwards. The side portion 51a of the guided member 51 of the clamping screw 50 moves while being pressed by the leg portion 71 of the elastic member 70. The side portion 51b of the guided member 51 of the clamping screw 50 is connected to the side wall 61 of the guide groove 60.
Touch b and move upward. Thereby, the clamping screw 50 moves without swinging.

Furthermore, loosen the clamping screw 50. Clamping screw 5
The corner 51d of the guided member 51 of 0 is the elastic member 7
It is pressed by the push-up part 71a of the leg part 71 of No. 0, and becomes the state shown in the right half of FIG.

Furthermore, loosen the clamping screw 50. Clamping screw 5
The tip of the screw portion 53 of 0 is connected to the screw hole 41 of the terminal board 40.
come off from The push-up portion 71a of the leg portion 71 of the resilient member 70 presses against the corner portion 5 of the guided member 51 of the clamping screw 50.
Push 1d upward. The clamping screw 50 is raised. Corner 51d of guided member 51 of clamping screw 50
is the elastic locking portion 71b of the leg portion 71 of the elastic member 70
is locked in the upper position. A gap is formed between the terminal plate 40 and the tip of the threaded portion 53 of the clamping screw 50. This allows the round terminal to be removed.

That is, when the tip of the threaded portion 53 of the clamping screw 50 is removed from the screw hole 41 of the terminal plate 40, the clamping screw 50 is positioned as shown in the right half of FIG.

According to the terminal block 10 according to the first embodiment, since the compression spring 73 of the resilient member 70 is replaceable, the biasing force of the resilient member 70 can be set to an optimum value. Furthermore, since the leg portions 71 and compression springs 73 of the elastic member 70 are made separate, the leg portions 71 can be made flexible with low elasticity and have excellent durability. can.

FIG. 7 shows a terminal block 1 according to a second embodiment of the present invention.
0a is shown.

The difference between the configuration of the terminal block 10a and the configuration of the terminal block 10 according to the first embodiment is in the compression spring 73 of the elastic member 70.

That is, the compression spring 73a of the resilient member 70a of the terminal block 10a is compressed by the side walls 61a, 61 of the guide groove 60.
It is installed between a. The compression spring 73a of the elastic member 70a is formed in an inverted U shape. The end of the compression spring 73a is extended outward, and the elastic member 7
The tips of the leg portions 71 of 0 can be pushed out to the outside.

According to the terminal block 10a according to the second embodiment, the compression spring 73a of the resilient member 70a can be mounted in the guide groove 60 more easily.

Although the above embodiment shows a terminal block with a unit structure, it can be applied to a terminal block having a clamping part at the end of the electric wire, and it goes without saying that it can also be applied to a terminal block with an integral structure. do not have.

Furthermore, although the clamping screw 50 is provided with the guided member 51, the clamping screw 50 may be directly guided by the guide groove 60 without providing the guided member 51.

Note that the elastic member 70 does not use a compression spring.
It goes without saying that the leg portions 71 may be provided with elasticity and may have an integral structure. In addition, the elastic member 70
If it is made of an insulating synthetic resin material, the clamping screw 50 is insulated far away from the conductive part, and can easily meet usage conditions with strict insulation specifications.

[Effect of idea]

According to the terminal block according to the present invention, the clamping part having a gap in which the wire end of the electric wire can be inserted has a simple structure,
It is possible to provide a terminal block at low cost, with a smaller size and lighter weight, and also to securely clamp the wire ends of electric wires in the clamping parts, and to quickly remove the wire ends of the electric wires from the clamping parts. can.

[Brief explanation of the drawing]

Figures 1 to 6 show a first embodiment of the present invention, where Figure 1 is a cross-sectional view of the terminal block, Figure 2 is a plan view, Figure 3 is a side view, and Figure 4 is a side view. a, b
and c are plan views showing the various ends of the wire, 5th
The figure is an explanatory diagram of how the cover is attached, Fig. 6 is an explanatory diagram of the operation of the terminal block, Fig. 7 is a cross-sectional view of the terminal block showing the second embodiment of the present invention, and Fig. 8 is an explanation of the conventional terminal block. It is a diagram. DESCRIPTION OF SYMBOLS 10... Terminal block, 20a, 20b... Base unit, 30... Base body, 40... Terminal board, 50... Clamping screw, 60... Guide groove, 70... Resilient member, 7
1... Leg portion, 71a... Push-up portion, 71b... Resilient locking portion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a terminal block having a wire end or terminal clamping part, a terminal plate is fixed below the middle part of the base body, a screw hole is cut in the terminal plate, and A clamping screw that is screwed into the screw hole is arranged above the screw hole, and a guide groove is formed in the base body to guide the clamping screw so that it can move in the vertical direction and to prevent it from slipping out upward. A resilient member is disposed on the upper part of the base body at a position adjacent to the inner side wall of the guide groove and above the terminal board, and the resilient member is provided with a guide member from the inner side wall of the guide groove. Resiliently protrudes into the groove, urges the clamping screw upward just before it comes off from the screw hole, and positions the clamping screw in a position where no upward force is generated and interference occurs when the clamping screw is fastened to the terminal plate. A retractable leg is provided, and when the leg of the resilient member pushes up the clamping screw that has come out of the screw hole, a gap through which the wire end of the electric wire or the terminal is inserted is formed between the tip of the clamping screw and the clamping screw. A terminal block, characterized in that the clamping part is set so that it can be formed between the terminal block and the terminal board.