JP2007026969A - Insertion type terminal device of circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insertion type terminal device of a circuit breaker in which the fixing portion of a terminal member and a terminal board does not have loosening with the passage of time and which is easy to manufacture. <P>SOLUTION: The insertion type terminal device is provided with a terminal member 1 of a rod shape having an engaging recessed part and a flange part at the outer circumference in the middle portion, a terminal board 3 which has a through hole to penetrate and support the terminal member 1, and a ring-shape plate 2 which is formed of a plate of ring shape and has a plurality of engaging pawls 2c that are protruded toward the center at equal spacings at the inner circumference edge and formed by folding so as to be inclined to the plate face. Then, the terminal member is inserted from one side of the terminal board by locking the flange part to the through hole, and the engaging pawls of the ring plate inserted from the other side are engaged with the recessed part of the terminal member, and thereby fix the terminal member to the terminal board by utilizing their spring action force. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a plug-in type terminal device for a circuit breaker for connecting and connecting a circuit breaker connection contact portion such as a circuit breaker for wiring or a circuit breaker, and more specifically, a terminal member constituting the plug-in type terminal device. And a terminal block.

The circuit breaker is arranged between the power supply side and the load side of the circuit, and protects the electric wires and conductors from this installation point to the load. The method of connecting this circuit breaker to the circuit is Various types of conductors are prepared according to the facility conditions of the conductor, and one of them is called a “plug-in type”. This is done by attaching a plug-in type terminal device comprising a terminal member to an insulating terminal block to a panel or the like in the switchboard, and inserting the connection contact portion of the circuit breaker into this plug-in type terminal device. The terminal member is electrically connected. Since one end side of the terminal member is connected in advance with an external conductor that communicates with the power source and the load, an electric circuit connecting the power source side and the load side is formed by inserting the circuit breaker, and by turning on the circuit breaker, Energization is possible. Accordingly, since the circuit breaker body can be easily inspected and replaced, it is often used, for example, for a ship or the like in which a circuit breaker needs to be replaced promptly when an accident occurs.
As a conventional technique of such a plug-in type terminal device, for example, a stud (terminal member) provided with a plate-like conductor portion having a hole for connecting an external conductor to a terminal block made of an insulator fixed to a mounting board. In addition, a structure is disclosed that is configured to be screwed and fixed by a seat plate having a screw (for example, see Patent Document 1).

Japanese Utility Model Publication No. 59-5825 (pages 1 and 2 and FIG. 1)

As described above, since the terminal member is screwed to the terminal block made of an insulator (usually resin) by the seat plate in the plug-in type terminal device of the conventional circuit breaker, the resin material of the terminal block is appropriate If it is not selected, there is a possibility that the resin shrinks due to secular change or the like and the screw is loosened. The looseness of the screw leads to instability of the contact between the terminal member and the contact portion for connection, and when the contact becomes unstable, the contact resistance may increase to cause abnormal heat generation.
In addition, the terminal member is divided into the contact part with the circuit breaker side, the seat part fixed to the terminal block, and the connection part with the external conductor from the shape, but these parts in the structure having the screw part as described above It is extremely difficult to realize the assembly by integral molding, and for example, it has to be dealt with by brazing welding between parts, which causes an increase in cost.

  This invention has been made to solve the above-described problems, eliminates the screw fastening portion in the fixing portion between the terminal member and the terminal block, the fixing portion does not loosen due to secular change, and It is an object of the present invention to obtain a plug-in type terminal device for a circuit breaker in which a terminal member can be easily manufactured.

  The plug-in type terminal device for a circuit breaker according to the present invention is a plug-in type terminal device for a circuit breaker in which an electric circuit connecting a power source side and a load side is formed by inserting the circuit breaker, one end of which is an external conductor The other end is connected to the connection contact portion of the circuit breaker, the rod-shaped terminal member having an engagement recess and a flange on the outer periphery of the intermediate portion, and the terminal member having a through hole that penetrates the terminal member A terminal block to be supported, and a ring plate having a plurality of engaging claws formed by ring-shaped plates, projecting toward the center at substantially equal intervals on the inner periphery, and bent so as to be inclined with respect to the plate surface The ring is formed by inserting the terminal member into the through-hole from one side of the terminal block and locking it with the flange, and engaging the engaging claw of the ring plate inserted into the terminal member from the other side with the engaging recess. The terminal member is fixed to the terminal block by the spring acting force of the plate. Those configured as.

  According to the present invention, the terminal member is inserted by locking the collar portion from one side of the terminal block to the through hole, and the engaging claw of the ring plate inserted from the other side is engaged with the engaging recess of the terminal member. Since the terminal member is fixed to the terminal block using the spring acting force, even if the terminal block made of an insulating material such as resin shrinks due to aging, the fixing portion of the terminal member is loosened. There is no. Further, since the contraction of the material of the terminal block can be covered with the spring acting force, the range of selection of the material for the terminal block is widened. Further, the terminal member can be integrally formed by, for example, cold forging, and the productivity can be improved and the cost of the product can be reduced.

Embodiment 1 FIG.
1 is a front view showing the entire plug-in type terminal device of the circuit breaker in Embodiment 1, FIG. 2 is a perspective view of a terminal member constituting the plug-in type terminal device of FIG. 1, and FIG. FIG. 4 is a perspective view showing the terminal block of FIG. 1.

  As shown in FIG. 1, a circuit breaker plug-in terminal device (hereinafter simply referred to as “plug-in terminal device”) 11 has one end connected to an external conductor 12 connected to the power supply side or load side, and the other end. It is comprised by the rod-shaped terminal member 1 to which the connection contact part 13a of the circuit breaker 13 is connected to, the ring board 2 for fixing the terminal member 1, and the terminal block 3 which penetrates and supports the terminal member 1. Yes. The figure shows a single-phase portion, but in the case of three phases, three sets of terminal members 1 having the same shape are juxtaposed in a direction perpendicular to the drawing sheet and fixed to the terminal block 3 in parallel. . The plug-in type terminal device 11 is attached in advance to the panel 14 of the switchboard with screws 15 in advance, for example, and the circuit breaker 13 that matches the main dimensions of the plug-in type terminal device 11 between the power source and the load and between the poles. Is fixed to the terminal block 3 with a screw or the like from a mounting hole (not shown) of the circuit breaker 13. Thereby, the electric circuit which connects the power supply side and the load side is formed. A connector 16 is provided between the connection contact portion 13a of the circuit breaker 13 and the contact portion 1a at the tip of the terminal member 1 so as to contact and electrically connect with a predetermined contact pressure. Since it is not the main part of the invention, detailed description is omitted.

Next, the detail of each part of the insertion-type terminal device 11 is demonstrated. First, as shown in FIG. 2, the terminal member 1 is manufactured by, for example, integrally forming a rod-shaped copper material by a manufacturing method such as cold forging, and contacts the above-described connector 16 from above in the drawing. It consists of a portion 1a, an engaging portion 1b that fits into a through hole of the terminal block 3, a flange portion 1c that serves as an axial stopper when attached, and a connecting portion 1d to which the external conductor 12 is connected. On the outer periphery of the engaging portion 1b, four engaging recesses 1e that engage with engaging claws 2a of the ring plate 2 described later are provided at intervals of 90 degrees in the circumferential direction. The relationship between the circumferential position of the engagement recess 1e and the orientation of the contact surface of the contact portion 1d is either one of two sets of lines connecting the engagement recesses 1e passing through the center of the circle of the engagement portion 1b. The contact surface is parallel.
In addition, the shape of the connection part 1d shows an example, and is not limited to the shape shown in the figure. For example, in addition to a plate shape, a rod shape may be provided with a screw hole for connection in the axial direction from the end. .

  Next, the ring plate 2 will be described. As shown in the plan view (a) and front view (b) of FIG. 3, the ring plate 2 is made of a ring-shaped plate material (for example, a thin steel plate having spring properties) and is centered at substantially equal intervals on the inner peripheral edge side. It has a plurality of engaging claws 2a formed so as to protrude toward the surface and bend so as to be inclined with respect to the plate surface. The engagement claws 2a correspond to the engagement recesses 1e of the terminal member 1 described above, and in the present embodiment, four engagement claws 2a are provided at intervals of 90 degrees. In addition, a positioning claw 2b is provided on the outer peripheral edge of the ring plate 2 at a position opposite to any one of the engaging claws 2a so as to be inclined with respect to the plate surface. In addition, K1 in a figure has shown the diameter of the virtual circle which touches the front-end | tip of the engaging claw 2a.

  Next, the terminal block 3 will be described. As shown in FIG. 4, the terminal block 3 made of an insulating material such as an insulating resin serves as a space for ensuring the connection between the connection contact portion 13 a of the circuit breaker 13 and the contact portion 1 a of the terminal member 1. Connection chamber 3a, receiving chamber 3b for preventing flange 1c of terminal member 1 from protruding from the bottom surface, and through hole 3c for inserting and holding end member 1 through connection chamber 3a and receiving chamber 3b. I have. And the protrusion part 3d is provided in the bottom face of the connection chamber 3a, and the groove part 3e is formed in the wall surface in the axial direction.

The relationship between the protrusion 3d and the groove 3e of the terminal block 3 and the terminal member 1 and the ring plate 2 described above will be described with reference to FIG. FIG. 5 is a plan view of the connection chamber 3a of the terminal block 3. The X-axis direction represents the direction of a line connecting the centers of the terminal members 1 located on the power supply side and the load side of the terminal block 3, and the Y-axis. The direction represents the inter-pole direction.
Although the direction of the contact surface of the contact portion 1d of the terminal member 1 is not shown in FIG. 5, the direction is the X-axis or Y-axis direction. (FIG. 1 shows the case where the contact surface is oriented in the X-axis direction.) The engaging claws 2a on the inner peripheral edge side of the ring plate 2 are aligned in the X-axis and Y-axis directions. The positioning claw 2b on the outer peripheral side is directed to one end side (right side in the figure) of the X axis.
The groove 3e formed on the terminal block 3 side is provided on the X axis so as to be engaged with the positioning claw 2b, and further provided on the Y axis that is 90 degrees away from that point.
Since the projection 3d is provided at a position at an approximately intermediate angle between the adjacent engaging claws 2a, four projections 3d are provided at positions shifted by 45 degrees from the X axis and the Y axis in the present embodiment. .

In addition, although the shape of the protrusion 3d is shown as a rectangular shape when viewed from the plane, the shape is not limited to this, and the protrusion 3d is partially formed in a circular protrusion on the surface facing the ring plate 2. Also good.
Moreover, although the case where two grooves 3e are provided at a pitch of 90 degrees is shown, the number is not limited to two, and four grooves 3e may be provided at a pitch of 90 degrees on the wall surface.

Subsequently, the assembly procedure will be described with reference to FIGS. 1 and 6. FIG. 6 is an enlarged view of the main part of FIG. 1, and is a diagram for explaining the state of the ring plate 2 after assembly. The dimension K2 in the figure indicates the diameter of an imaginary circle in contact with the bottom surface of the engagement recess 1e provided in the circumferential direction of the terminal member 1. The dimension K2 is set to be approximately equal to the dimension K1 described above with reference to FIG.
First, from the receiving chamber 3 b side of the terminal block 3, the terminal member 1 is inserted into the through hole 3 c from the contact portion 1 a side, and the flange portion 1 c is locked to the lower bottom surface of the terminal block 3. At this time, as shown in FIG. 1, the contact surface of the contact portion 1d is oriented so as to be substantially parallel to the line connecting the power supply side and the load side. However, since the orientation of the contact surface depends on the connection with the arranged outer conductor, depending on the direction of the outer conductor, the orientation may be changed by 90 degrees from the figure to be substantially parallel to the line connecting the circuit breaker poles. Also good. Since the engagement recesses 1e and the engagement claws 2a have a 90-degree pitch, even if the orientation is changed by 90 degrees, the relationship between the parts as described in FIG. 5 does not change.

  Next, from this state, the ring plate 2 is inserted into the terminal member 1 with the engaging claw 2a inclined, and the positioning claw 2b is connected to one of the groove portions 3e of the terminal block 3 and connected. It goes down toward the bottom of the chamber 3a. At this time, as described above, the K1 dimension on the engagement claw 2a side and the K2 dimension in FIG. 6 are substantially equal to each other. After the engagement claw 2a comes into contact with the engagement portion 1b, a jig or the like is used. Then, the engaging claw 2a is still lowered while being slightly opened outward. Then, the bottom surface of the ring plate 2 comes into contact with the protrusion 3d. Since this abutting portion is deviated from the portion of the engaging claw 2a by about 45 degrees (that is, located at a substantially intermediate angle between the adjacent engaging claws 2a), the engaging portion is further opposed to the protrusion 3d. By pushing down the vicinity of the joint claw 2a, as shown in FIG. 6, the dimension δ becomes a so-called “deflection”, and a spring acting force is generated on the ring plate 2. The terminal member 1 is fixed to the terminal block 3 by lowering the engaging claw 2a slightly further and engaging with the engaging recess 1e of the terminal member 1. The positional relationship of the engaging recess 1e with respect to the axial direction of the terminal member 1 is set to a position where the deflection δ of FIG. 6 is a predetermined dimension and a predetermined spring acting force is obtained.

  The groove 3e provided in the terminal block 3 is used for positioning the ring plate 2. The reason why the two grooves 3e are arranged at intervals of 90 degrees as shown in FIG. 5 will be described. For example, after assembling the plug-in terminal device 11 with the terminal member 1 in the orientation shown in FIG. 1, that is, the contact surface of the contact portion 1d is parallel to the line connecting the power supply side and the load side, When it is necessary to change the orientation of the connector 90 degrees, a tool such as a screwdriver is inserted into the groove 3e, and the engaging claw 2b is slightly tilted to the inner diameter side to release the engagement state, and the terminal member 1 is moved to the ring plate. 2 and the positioning claw 2b can be stored in the adjacent groove 3e. As described above, the two groove portions can change the orientation of the contact surface by 90 degrees after the plug-in terminal device 11 is assembled.

  In addition, when the change after an assembly | attachment as mentioned above is unnecessary, or when the shape of the connection part 1b of the terminal member 1 is not plate shape like a figure, and it is not necessary to consider the direction of an attachment surface, it is a groove part. The number 3e may be one for simple positioning, and if positioning is not required, the positioning claw 2b and the groove 3e may be omitted.

  Further, in the above description, the engagement positions 1e in the circumferential direction of the engagement recesses 1e provided in the terminal member 1, the engagement claws 2a provided in the ring plate 2, and the projections 3d provided in the terminal block 3 are as follows. Although the case of four at 90 degree intervals has been described, the present invention is not limited to this. That is, the engaging recess 1e and the engaging claws 2a corresponding to the engaging recess 1e need only be formed at substantially equal intervals in the circumferential direction. At this time, the protrusion 3d on the terminal block 3 side is adjacent to the engaging portion 3d. What is necessary is just to provide so that it may be located in the intermediate | middle angle of a nail | claw.

  As described above, according to the invention of the present embodiment, the terminal member is inserted by locking the flange portion from one side of the terminal block to the through hole, and the engagement claw of the ring plate inserted from the other side is connected to the terminal. Since the terminal member is fixed to the terminal block by engaging with the engaging recess of the member and utilizing its spring acting force, it can follow the dimensional shrinkage due to aging of the terminal block, etc. There will be no looseness. For this reason, the reliability of a connection part with a circuit breaker can be improved. Further, the range of material selection for the terminal block is widened, and for example, it is possible to select a cheaper resin material. Furthermore, since the terminal member does not have a threaded portion, it can be integrally formed by, for example, cold forging, and therefore, the productivity can be improved and the cost of the product can be reduced.

In addition, since the protrusion is provided on the surface of the terminal block that is located at an approximately intermediate angle between the engaging claws adjacent to the ring plate and faces the ring plate, a predetermined spring force can be easily obtained. And the terminal block can be more reliably prevented from loosening.
Moreover, since the positioning claw is provided on the outer peripheral edge of the ring plate and the groove portion that engages with the positioning claw is provided in the terminal block, the terminal member can be prevented from rotating in the circumferential direction.
Furthermore, by providing at least two grooves at approximately 90 degree intervals in the outer circumferential direction of the ring plate, the orientation of the contact surface of the terminal member can be easily changed by 90 degrees even after the plug-in terminal device is assembled. Is possible. For this reason, for example, it is possible to quickly cope with a sudden specification change.

Embodiment 2. FIG.
7A and 7B are views showing a ring plate of a plug-in type terminal device for a circuit breaker according to Embodiment 2 of the present invention, wherein FIG. 7A is a plan view and FIG. 7B is a front view. The whole of the plug-in terminal device is substantially the same as FIG. 1 of the first embodiment, and the terminal member 1 is also equivalent to FIG. 2 of the first embodiment. The explanation will be focused on.

In the first embodiment, the protrusion for generating the deflection in the ring plate is provided on the terminal block side. However, in the present embodiment, the projection is provided on the ring plate side. Therefore, the terminal block has a shape in which the protrusion 3d is omitted from the state of FIG. 4, and the bottom surface of the connection chamber 3a is formed flat.
As shown in FIG. 7, the ring plate 4 is a surface facing the terminal block 3 (a surface opposite to the inclined side of the engaging claw 4 a), and an approximately intermediate angle between the adjacent engaging claws 4 a. The protrusion 4c is provided at the position. Since the figure shows a case where four engaging claws 4a are provided at intervals of 90 degrees, four protrusions 4c are provided at positions shifted by 45 degrees from that. The position in the radial direction of the protrusion 4c is preferably about the center of the outer diameter and inner diameter of the ring plate 4. Further, one positioning claw 4b provided on the outer diameter side is provided at a position facing one of the engaging claws 4a, as in FIG. 3 of the first embodiment.
The ring plate 4 is generally manufactured by punching a thin steel plate, and the protrusion 4c can be formed at the same time. There is almost no up.

  The work of assembling the plug-in terminal device configured as described above is substantially the same as the procedure described in the first embodiment. The ring plate 4 is inserted into the engaging portion 1b of the terminal member 1 and pushed down. After the projection 4c comes into contact with the bottom surface of the connection chamber 3a of the terminal block 3, the ring plate 4 is engaged against the locking of the projection 4c. By further pressing the vicinity of the joint claw 4a and engaging the engagement claw 4a with the engagement recess 1e, the dimension δ becomes a so-called “deflection” as in the case of FIG. A spring acting force is generated on the plate 4, and the terminal member 1 is fixed to the terminal block 3.

  As in the first embodiment, the positions and the number of the engagement recesses 1e provided in the terminal member 1 and the engagement claws 4a and protrusions 4c provided in the ring plate 4 in the circumferential direction are 4 at 90 ° intervals. The number of the engaging recesses 1e and the engaging claws 4a is not limited to a single one, and it is only necessary to form a plurality of the engaging recesses 1e and the engaging claws 4a at substantially equal intervals in the circumferential direction. What is necessary is just to be located in an angle.

  As described above, according to the invention of the present embodiment, a protrusion is provided on the surface of the ring plate that is positioned at an approximately intermediate angle between adjacent engaging claws of the ring plate and that faces the terminal block, and resists the protrusion. Since the vicinity of the engagement claw of the ring plate is pressed and the engagement claw is engaged with the engagement recess, in addition to the same effect as the first embodiment, it is not necessary to provide a protrusion on the terminal block side. The terminal block can be easily manufactured as compared with the first embodiment.

It is the front view shown in the partial cross section of the insertion-type terminal device of the circuit breaker in Embodiment 1 of this invention. It is a perspective view of the terminal member which comprises the insertion-type terminal device of FIG. It is the top view and front view of a ring board which comprise the insertion type | mold terminal device of FIG. It is a perspective view of the terminal block which comprises the insertion-type terminal device of FIG. It is a top view of the connection chamber of the terminal block which comprises the insertion type | mold terminal device of FIG. It is a principal part enlarged view of FIG. It is the top view and front view which show the ring board of the insertion-type terminal device of the circuit breaker in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Terminal member 1a Contact part 1b Engagement part 1c collar part 1d Connection part 1e Engagement recessed part 2,4 Ring board 2a, 4a Engagement nail | claw 2b, 4b Positioning nail | claw 3 Terminal block 3c Through-hole 3d Protrusion part 3e Groove part 4c Protrusion 11 Plug-in type terminal device 13 Circuit breaker 13a Contact part for connection.

Claims (5)

In the circuit breaker plug-in type terminal device in which an electric circuit connecting the power supply side and the load side is formed by inserting the circuit breaker,
A rod-shaped terminal member having one end connected to the external conductor and the other end connected to the connection contact portion of the circuit breaker and having an engaging recess and a flange on the outer periphery of the intermediate portion, and a through-hole through which the terminal member passes And a plurality of engagements formed by ring-shaped plates that protrude toward the center at substantially equal intervals and bend so as to be inclined with respect to the plate surface. A ring plate having a claw, wherein the terminal member is inserted into the through-hole from one side of the terminal block and locked by the flange, and the ring plate is inserted into the terminal member from the other side. The circuit breaker plug-in type terminal, wherein the terminal member is fixed to the terminal block by the spring acting force of the ring plate by engaging the engaging claw with the engaging recess. apparatus.   2. The plug-in type terminal device for a circuit breaker according to claim 1, wherein a protrusion is provided on the surface of the terminal block located at a substantially intermediate angle between adjacent engaging claws of the ring plate and facing the ring plate. A circuit breaker plug-in type terminal device characterized in that a spring acting force can be obtained by engaging the engaging claw with the engaging recess against the protrusion. .   2. The plug-in type terminal device for a circuit breaker according to claim 1, wherein a projection is provided on a surface of the ring plate that is positioned at an approximately intermediate angle between adjacent engaging claws of the ring plate and that faces the terminal block. 2. The circuit breaker plug-in according to claim 1, wherein a spring acting force is obtained by engaging the engaging claw with the engaging recess against the protrusion. Terminal device.   The insertion type terminal device for a circuit breaker according to any one of claims 1 to 3, wherein a positioning claw is provided on an outer peripheral edge of the ring plate, and the terminal block is engaged with the positioning claw. A circuit breaker plug-in type terminal device characterized in that a groove portion is provided.   5. The plug-in type terminal device for a circuit breaker according to claim 4, wherein at least two grooves provided in the terminal block are arranged at intervals of approximately 90 degrees in the outer peripheral direction of the ring plate. Plug-in terminal device for circuit breakers.

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