JPS6149355A - Circuit breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a circuit breaker in which two circuit breakers (1"q) are installed side by side and tripped in conjunction with each other.

[Background Art] Conventionally, in this type of circuit breaker in which two circuit breakers tmN are installed together and tripped in conjunction with each other, when the latch plate of the tripping means is shared, the latch load becomes large. There was a problem that the tripping operation became unstable and the reliability deteriorated. Therefore, there was a device that provided a trip means for each circuit breaker structure and operated the trip means in conjunction with each other, but the interlocking body was an external component and it was difficult to assemble. There was a problem.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to provide a circuit in which the tripping operation is performed without variation, reliability is improved, and furthermore, it is easy to assemble. The object of the present invention is to provide a shield l17r device.

[Disclosure of the Invention] (Structure) The present invention comprises a central block 2 in which a partition wall 2a is provided in the center of a cylindrical body that opens on left and right sides;
The storage section 5a is shielded from the left and right by two 1U11 surface covers 3a and 3b which cover each side opening of the storage section 5a.

forming a housing 1 having handle means (51);
For example, a breaking contact 8 which is opened and closed by an operating handle 6) and forcibly released by a trip hand Vi7, and a locking pin 16 protruding from one end of a movable contact plate 9 of the breaking contact 8 are engaged. A circuit interrupting drowsiness Δ comprising an overcurrent detection means 20 that engages one end of the latch plate 19 of the trip means 7 and operates the trip means 7 when an overcurrent flows by having a latch engagement piece 17 that stops the circuit; B is blocked by the rocky groove storage section 5a.
, 5b respectively, and -n) is housed in each circuit breaker (1"
A trip drive piece 28a is engaged with the other end of the latch plate 19 of 17A and 17B and is located on the locus of the locking pin 16.
, 28h attaches the center part of the interlocking body 26 provided at the 1iTii end to the partition wall 2a so as to be rotatable, and one circuit is cut off (
When the tri-knob means 7 of the stepped groove ASB is operated, the interlocking body Z6 is rotated by turning off the movable contact plate 9 to interrupt the other circuit, and the trip means 7 of MA and B are operated. Both circuits are cut off in the precess groove A,
A circuit breaker can be obtained in which the tripping behavior of B is uniform, reliability is improved, and it is easy to assemble.6 (Example) Figure 1 shows an example of the present invention. The housing 1 includes a central block 2 having a partition wall 2a at the center of a cylindrical body opening on both left and right sides, and two side covers each covering each side opening of the central block 2. 3a, 3b
The three parts are integrated at the mounting plate 4 in which the pivot hole 6a of the operating handle 6 is formed, and the cutout storage parts 5a and 5b are formed on both sides of the partition wall 2a. It has become.

Note that the medium fire block 2 has a shape in which side covers 3a and 3[+ are integrated with back to back sides. Furthermore, by combining the side covers 3a and 3b without using the central block 2, a housing for a single-pole circuit breaker can be formed, and a housing for a single-pole or two-pole circuit breaker can be formed. The idea is to share housing parts. III Ban M 32
is for closing an opening 33 for attaching a remote control means formed in the lower surface of the housing 1. The cut-off contact 8, which is DI closed by the operation handle 6 and forcibly opened by the tri-knob means 7, has a movable contact 10 provided at one end of the movable contact plate 9, and a movable contact 10 provided on the terminal plate 11. Fixed contact 1
It is formed by 2. The trip means 7 includes an operator 13 whose one end is engaged with the engaging portion of the operating handle 6 and whose center portion is pivotally supported by the housing 1, and a movable contact 7 between the operator 13 and the other end.
a link spring 14 that connects the central part of the contact plate 9; an opening spring 15 that is interposed between the operator 13 and the movable contact plate 9 and biases the movable contact Fi9 in the IJII pole direction; F
A launch engagement piece 17 that engages with a locking pin 16 protruding from the other end of i9 is provided, and the center portion is provided with a rotating shaft 18)
The latch plate 19 is supported by a pivot on the latch plate, and a biasing spring 19a that biases the upper end of one of the latch plates outward. When the cutoff contact 8 is latched in the on state, the latch plate 19
By pressing the upper end of the latch inward, the latch engagement piece 17 and the locking pin 16 are disengaged, and a tripping operation is performed. The ring 14a through which both ends of the link spring 14 are inserted limits the opening angle of the link spring 14. The arc-shaped guide groove 16a is the locking pin 16
are engaged to restrict rotation of the movable contact plate 9. An overcurrent detection means 20 that engages one end of the latch plate 19 of the trip means 7 to operate the trip means 7 when an overcurrent flows has one end fixed to a terminal plate 21 and connected via a stranded wire 22. It is formed of a bimetal 23 connected in series to the breaking contact 8, and when an overcurrent flows, the bimetal 23 curves inward to press the upper end of the latch plate 19 inward and rotate the latch plate 19. After moving, the locking pins 16 and latch retaining pieces 17 of ;Z, vi, 9
The contact 8 is disengaged from the contact 8, and the toss-off means 7 is operated to forcefully turn off the interrupting contact 8.

In this way, the left and right interrupters I (circuit interrupters stored in the 7r groove storage portions 5a and 5b) are interrupters that are opened and closed by the operation handle 6 and forcibly opened by the trip means 7. It is formed by the contact 8 and an overcurrent detection means 20 that operates the trip means 7 when an overcurrent flows through α8 after each interruption. A bimetal attachment portion 21a is screwed into the hole 25 and has a bent tip of the sensitivity adjustment screw 24.
By screwing the sensitivity if1 adjustment screw 24, the degree of bending is changed and the bimetal 23 is tilted.
The gap between the upper end of the bimetal 23 and the upper end of the latch plate 19 is adjusted. Both circuits cut off njM A
An interlocking body 26 for interlockingly operating the trip means 7 of circuit breakers A and B has one end engaged with an engaging portion 27 formed at the other end of the latch plate 19 of each circuit breaker structure A and B. Trip drive pieces 28a, 281) located on the locus of the locking pin 16 of the temporary contact 9 are provided at both ends, and the center part of this interlocking body 26 is bored into the partition wall 2a. The shaft 31 is inserted into the shaft hole 30 and is rotatably connected. Therefore, after one circuit breaks (when the trip means 7 of the private sector (for example, A) operates), the interlocking wart 26 is rotated by the off rotation of QFj, 9, and the other circuit is broken (for example, B). trip means 7
is now working. In addition, 41 children @ 11.
Reference numeral 12 denotes a plug-shaped insertion terminal. ,! In the embodiment, the handle means for opening and closing the breaking contact 8 is formed by the operating handle 6 that engages with the operator 13 of both circuits breaking the circuits Δ and B. Instead, one end of each operator 13 may be extended to form an operating section.

The operation of the embodiment will be specifically explained below.

Figures 4 to M6 are explanatory views of the operation. Figure 4 shows when the operating handle 6 is set to the off side and the cut-off contact 8 is turned off, and Figure S5 shows when the operating handle 6 is set to the on side. When the cutoff contact 8 is latched on, as shown in FIG. 6, an overcurrent is detected and the tripping means rotates around the rotating shaft 13a, and this rotational force is transmitted to the movable contact @ via the link spring 14.
9, the movable contact plate 9 is rotated around the locking pin 16 that is engaged with the latch engagement piece 17 of the latch plate 19, and the movable contact 10 comes into elastic contact with the fixed contact 12 to close the breaking contact 8. is turned on. At this time, Link Bone 141 Koyoru Link Iso 4F! A dead center exists at t, so that a reliable reversal operation is performed, and the contact pressure of the cutoff contact 8 is reduced by 98 by the elastic force of the link spring 14. .

That is, in the on state shown in FIG.
4 is in a slightly compressed state, and an elastic force corresponding to this compressed amount is applied as contact pressure to the 7V 8 after disconnection.

At the same time, the opening pole 1215 is stretched and the trip 1 flood force is turned on. Next, one circuit is interrupted.
When the bimetal 23 of the overcurrent detecting means 20 curves inward and the upper end of one launch plate is pressed inward, the latch engagement piece 17 of the latch plate 19 and the movable contact point as shown in FIG. The locking pin 1G of the plate 9 is disengaged, the movable contact plate 9 is rotated about the engagement point of the link spring 14 by the return force of the opening spring 15, and the breaking contact 8h' is opened. At this time, the locking pin 16 protruding from the movable contact plate 9 moves down along the id 111716a, and one trip is located on the locus of the locking pin 16! Press the flood piece 28a and rotate the interlocking body 26! I! Let JJ do it. This interlocking body 26
But times ff! When IJ is performed, the other trip drive piece 28b
As a result, the latch plate 19 of the trip means 7 of the circuit breaker +n JM B is rotated, and the trip means 7 of the rotation breaker number B operates 1 times to forcibly open the interrupt contact 8. Become.

As mentioned above, in the heather invention, each circuit interruption type J+'
& ASB are each provided with a trip means 7, so
The latch load applied to one launch plate of trip hand fil 7 is neutralized and both circuits are interrupted (the tripping operation of step groove Δ, 13 is performed stably without variation, improving reliability. Since the interlocking body 26 is pivotally attached to the partition wall 2a of the central block 2 and integrated into the 41 parts of the housing song 1, assembly becomes easy.

[Effects of the Invention 1] As described above, the present invention includes a central block in which a partition wall is provided in the center of the front body that opens on both left and right sides, and two side covers that are each TtiN attached to each side opening of the central block. A cut-off contact is formed on the left and right sides with separate housing sections, and a cut-off contact is opened and closed by a handle means and is forcibly opened by a trip means. A circuit comprising an overcurrent detection means that engages with one end of the launch plate of the trip means having a latch engagement piece that locks a protruding locking pin and operates the trip means when an overcurrent iXV flows. The above-mentioned block formation h' of the blockade sleep IR
An interlocking body which is housed in each storage part, and has one end engaged with the latch plate of each circuit interrupting structure as well as n1, and a trip drive piece located on the locus of the locking pin is provided at the ii'Iiii end. The central part of the circuit breaker Wt is rotatably pivoted to the partition wall, and when the tribbing means of one circuit breaker No. 11 is operated, the interlocking body is rotated by turning off the movable contact plate, and the other circuit breaker Wt is rotated. Since each circuit breaker is provided with a trip means, the launch load applied to the latch plate of the trip means is 1 i! - It has the effect of improving reliability by stably performing the 1° tripping operation without variation when both circuits are cut off. Since it is integrated into the drawing member, it has the advantage of being easy to assemble.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the same, Fig. 3 is an external perspective view of the same, and Figs. 4 to 6 are explanatory diagrams of the operation of the same. be. 1 is how song, 2 is central block, 2a is bulkhead, 3α
, 3b is a side cover, 6 is an operation handle, 7 is a trip means, 8 is a cutoff contact, 9 is a movable contact plate, 16 is a locking pin, 17 is a latch engagement piece, 19 is a latch plate, 20 is an overcurrent detection Means 26 is an interlocking body, and 28a and 28b are trip drive pieces. Agent Patent Attorney Ishi 1) Ai 7, Figure 3, Figure 4, Figure 5

Claims (1)

[Claims] (1) A central block with a partition in the center of a cylindrical body that opens on both the left and right sides, and two side covers that cover each side opening of the central block to create a blocking mechanism storage section on the left and right sides. a breaking contact that is opened and closed by the handle means and forcibly opened by the trip means; and a latch that locks a locking pin protruding from one end of the movable contact plate of the breaking contact. A circuit interrupting mechanism comprising an overcurrent detecting means that engages one end of the latch plate of the tripping means having a joint piece to operate the tripping means when an overcurrent flows is housed in each of the above-mentioned interrupting mechanism storage parts, is engaged with the other end of the latch plate of each circuit breaker mechanism, and the trip drive piece located on the locus of the locking pin pivots the middle fire part of the interlocking body provided at the end of the The circuit breaker is constructed such that when the trip means of one circuit breaker mechanism is activated, the interlocking body is rotated by the off rotation of the movable contact plate to operate the trip means of the other circuit breaker mechanism.