JPH0142272Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a circuit or disconnector, and particularly to a circuit or disconnector equipped with an accessory device.

[Conventional technology]

In conventional circuit breakers of this type, the following two configurations have been adopted for attaching accessory devices. The first configuration is such that the circuit breaker is installed within the base and cover that constitute the casing of the disconnector body. That is, after each component of the circuit and the disconnector was mounted on a base made of a molded insulator, the accessory devices were also fixed on the base, and then covered with a cover made of a molded insulator. In addition, the second configuration is as shown in the Japanese Utility Model Application No. 57-6143 shown in FIGS. 15 and 16.
1, a recess 20 with an open upper surface and side surfaces is formed, and a through hole 20 is formed on the bottom surface 20A of the recess 20.
After drilling E, the accessory device 12 was installed in the recess 20, and the circuit was configured to transmit the operation of the circuit or disconnector to the accessory device 12 through the through hole 20E.

[Problem that the invention attempts to solve]

However, in the first configuration, since the attached device is attached inside the base and the cover, it is necessary to remove the cover each time the attached device is attached or removed.
There are disadvantages such as foreign matter entering the circuit or disconnector, and parts of attached equipment falling off. In addition, since the attached equipment is exposed to each component of the circuit breaker or breaker within the cover, the auxiliary equipment may be damaged by the arc generated when the circuit breaker or breaker cuts off the short-circuit current. There were flaws. Next, in the second configuration shown in FIGS. 15 and 16, the drawbacks of the first configuration are eliminated, but the central side of the top surface of the cover 11 is missing. However, there was a drawback that it was not possible to secure a mounting base for the nameplate that displayed the specifications of the circuit and disconnector body. In particular, in the case of small circuits and disconnectors, the flat surface of the top surface of the cover is narrow, making it difficult to display many display items determined by standards. Further, when the specifications of the attached device 20 are changed due to repair or the like, the shape of the recess 19 must also be changed, and the cover 2 has to be replaced. This invention was made in order to eliminate the above-mentioned problems.

[Means for solving problems]

The circuit breakers and disconnectors according to this invention include a base made of an insulating material and supporting constituent members of the cutters, a cover made of an insulating material that covers the constituent members and forms a housing together with the base, and an upper surface of the cover. an operating handle for manually operating the component, with an operating part protruding outside from an opening drilled in the cover; a recessed hole provided in the cover with an opening only on a side surface of the cover; an accessory device to be inserted, a support base having a plurality of walls stably supporting the accessory device inserted into the base and separating the accessory device from a portion of the component; A communication hole is provided at the bottom of the support base, into which a push plate is inserted to cause the accessory device and the component to operate in conjunction with each other.

[Effect]

This idea forms an opening on the side of the cover,
The accessory device inserted through this opening is attached to a mounting base, and this mounting base is equipped with a wall to prevent arc gas, so even if the size and shape of the accessory device changes, the accessory device can be stably fixed and mounted. This prevents arc gas from being applied to the area.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of the circuit breaker according to the invention, and FIG. 2 is a plan view with the cover of FIG. 1 removed. In FIGS. 1 and 2, a base 1 is made of an insulating material and supports each component of the circuit and disconnector. The fixed contact f conductor 2 is fixed to the base 1, a fixed contact 3 is fixed to one end thereof, and a terminal screw 4 for connecting an external electric wire is screwed to the other end. The movable contact 5 is fixed to one end of the movable contact conductor 6, facing the fixed contact 3. The push plate 7 opens and closes the three-pole movable contact conductor 6 at the same time, and moves up and down along the groove 101 of the base 1, and has a convex portion 7a at its upper end that operates an accessory device to be described later. It is equipped with The operation handle 8 is
The movable contact conductor 6 is opened and closed by manually moving the push plate 7 up and down via the opening/closing mechanism section 9. The separation spring 10 is connected to the base 1 and the push plate 7.
The push plate 7 is always pressed upward. The cover 11 is made of an insulating material, forms a housing together with the base 1, and covers each component supported by the base 1. As shown in FIG.
An opening 11a is formed in the upper surface of the operating handle 8 and allows the operating part of the operating handle 8 to protrude to the outside, and an opening 11 is provided in the side surface of the operating handle 8 parallel to the operating direction.
b.

Fig. 3 is an exploded view of the assembly of the base and cover mount, Fig. 4 is a plan sectional view showing the vicinity of the mount of the circuit breaker of this invention, and Fig. 5 is a side sectional view of Fig. 4. . In FIGS. 3 to 5, the mounting base 17 is formed of an insulating material and supports an attached device 12, which will be described later, and the convex portion 7a of the push plate 7 plunges into the circuit or when the disconnector breaks. A bottom wall 17b, a back wall 17c, and a side wall 17d, each having a communication hole 17a.
and a U-shaped outer wall 17f forming a vertical hole 17e between the side wall 17d and a convex portion 1 provided at the lower end of the outer wall 17f and fitting into the recess 102 of the base 1.
7g, a locking concave portion 17h that locks into the locking convex portion 11c of the cover 11, and a screw 14 provided on the outer wall 17f and which will be described later. Mounting hole 17 to fix
It is equipped with i. The holding plate 18 has a lower end that holds down a nut 19 that is inserted into a vertical hole 17e and is screwed into a screw 14 (to be described later), and an upper end that holds down a nut 19 that is inserted into a vertical hole 17e and that is screwed into a screw 14, which will be described later.
It is locked at 1e.

6 is an assembled exploded view of the accessory device 12 shown in FIG. 5, FIG. 7 is a rear perspective view of the base shown in FIG. 6, and FIG. 8 is a rear perspective view of the core shown in FIG. FIG. 9 is a perspective view of the main body of the accessory device shown in FIG. 6 after being assembled. In FIGS. 6 to 9, the base 12A is formed into a rectangular frame shape by a front wall 12c having a front plate 12b, a pair of side walls 12d, 12e, and a back wall 12f. It is formed.
The pair of engagement protrusions 12g are provided horizontally on the inner surfaces of the pair of side walls 12d and 12e, respectively, and fit into engagement recesses 12s of a core 12C, which will be described later. The elongated hole 12h is formed in the rear wall portion 12f in the longitudinal direction, and is connected to the actuating plate shaft 1 of the actuator 12D, which will be described later.
2u is rotatably supported. The lead wire holes 12i are connected to the surface plate 12b and the surface wall portion 1.
2c, and a micro switch 12 to be described later.
The lead wire 13 connected to B is penetrated and inserted. The mounting hole 12j is a screw hole 1 provided in the cover 11.
1j, the surface plate 12b and the surface wall portion 1
2c, and is attached to the base 1 by means of the mounting screws 14.
2A is fixed within the opening 11b of the cover 11.
The snap fit 12k is provided on the outer surface of the side wall portion 12e, and includes a locking protrusion 12l that fits into the locking recess 11i of the cover 11. The micro switch 12B has a connecting terminal 12m connected to the lead wire 13, a fitting hole 12o into which the protrusion 12n of the core 12C is fitted and inserted, and a stepped portion 12p on the bottom surface.
It is equipped with The core 12C supports the micro switch 12B, and a backing plate 12q is attached to the back of the core 12C.
, a protrusion 12n that is fitted and inserted into a fitting hole 12o of the micro switch 12B, and a hole 12r that rotatably supports an actuation plate shaft 12u of an actuator 12D, which will be described later. Further, on both sides thereof, a pair of engagement recesses 12s that engage with a pair of engagement protrusions 12g of the base 12A are provided, and a lead wire hole is provided penetrating from the front surface to the back surface. 1
It is equipped with 2t. The actuator 12D is driven by the convex portion 7a of the push plate 7 to turn on and off the micro switch 12B, and is rotatably inserted into the long hole 12h of the base 12A and the hole 12r of the core 12C. An actuating plate 12v having an actuating plate shaft 12u
and a leaf spring 12w attached to an actuating plate 12v.

Next, the assembly of the accessory device 12 will be explained using FIGS. 10a, 10b, and 10c. First, as shown in FIG. 9, after connecting the lead wire 13 to the micro switch 12B and the connecting terminal 12m, the lead wire 13 is inserted through the lead wire hole 12t of the core 12C. Next, the protrusion 12n of the core 12C is fitted and inserted into the fitting hole 12o of the micro switch 12B, and then the actuating plate shaft 12 of the actuator 12D is inserted.
u is inserted into the hole 12r of the core 12C, and the accessory device main body is assembled as shown in FIG. As shown in FIG. 10a, the accessory device body assembled in this way is inserted through the lead wire hole 12i of the base 12A, and then inserted into the hollow part of the base 12A from above. do. In this case, core 1
2C is located on the surface wall portion 12c side of the base 12A, and the outer surface side of the actuating plate shaft 12u of the actuator 12D is opposed to the elongated hole 12h of the base 12A.
In this state, as shown in FIG. 10b, the main body of the accessory device is moved toward the rear wall portion 12f of the base 12A, and the outer surface side of the actuating plate shaft 12u is inserted into the elongated hole 12h. Next, as shown in FIG. 10c, push the attachment device body downward, and then
2s is engaged with the pair of engagement protrusions 12g of the base 12A to complete the assembly. In this case, the pair of engagement recesses 12s and the pair of engagement protrusions 12g are engaged by elastic deformation of the base 12A. Further, the lead wire 13 is connected to the base 12A and the core 1.
It is bent into a Z-shape and arranged in the hollow part formed between the 2C and the 2C.

Next, the attachment of the accessory device 12 assembled in this manner to the circuit and disconnector main body will be explained with reference to FIGS. 11 and 12. As shown in FIG. 11, insert the accessory device 12 into the mounting base 17 through the opening 11b of the cover 11, and
Fit the locking protrusion 12l of the snap fit 12k provided at A into the locking recess 11c of the cover 11, insert the mounting screw 14 into the mounting hole 12j of the base 12A, and insert the mounting screw 14 into the mounting hole 12j of the mounting base 17. Mounting hole 1
7i and screwed into the nut 19 to complete the attachment of the accessory device 12 to the mounting base 17.

Next, the operation of this device will be explained using FIG. 13. Now, in FIG. 1, when a short circuit current flows through the circuit or disconnector, the push plate 7 moves upward due to the opening operation of the opening/closing mechanism section 9, as is well known, and the movable contact conductor 6 is opened. The spring force of the spring 10 opens the circuit and disconnects the circuit. In this case, the convex portion 7a of the push plate 17 presses the actuator 12D of the accessory device 12, as shown in FIG. 13, to operate the micro switch 12B.

FIG. 14 is a perspective view showing a lid that closes the opening 11b of the cover 11. In FIG. 14, the lid 15
When the accessory device 12 is attached to the mounting base 17 and is not inserted into the opening 11b, the opening 11b of the cover 11 is closed, and the mounting hole 15a into which the mounting screw 14 is inserted is engaged with the cover 11. It includes an engaging protrusion 15b that fits into the recess 11c.

In the above embodiment, a micro switch 12B, which is an auxiliary switch, is used as the accessory device 12, but it goes without saying that it may also be an alarm switch, a voltage tripping device, an undervoltage tripping device, etc. Nor. In addition, these attached devices 12
The user may specify the mounting pole for the circuit or disconnector, but for example, if the voltage tripping device is to be mounted on the right pole, the mounting base 17 must be manufactured as a single component. If a part of the shape of this mounting base 17 is arranged for a voltage tripping device, it will be easier to deal with the problem. In other words, the modification can be made at a lower cost than replacing the entire expensive cover 11.

[Effect of idea]

Since this invention is constructed as described above, when it becomes necessary to replace an accessory device such as a micro switch with one of a different size or shape, the mounting base can be replaced without the need for machining or cutting the main body. Therefore, it is possible to stably hold the disconnector and replace it through the side opening without removing the disconnector main body from the distribution board or the like. Furthermore, the high-temperature, high-pressure arc gas generated between the contacts of the breaker is suppressed by the wall of the mount, thereby preventing damage to attached equipment due to the arc gas.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing an embodiment of the circuit breaker according to this invention, Fig. 2 is a plan view with the cover of Fig. 1 removed, and Fig. 3 shows the cover of Fig. 1. A perspective view, FIG. 4 is a plan sectional view showing the vicinity of the mounting base of this circuit breaker, FIG. 5 is a side sectional view of FIG. 4, and FIG. 6 is an assembled exploded view of the accessory device shown in FIG. 5. , FIG. 7 is a rear perspective view of the base shown in FIG. 6, FIG. 8 is a rear perspective view of the core shown in FIG. 6, and FIG. 9 is a completed assembled perspective view of the accessory device body shown in FIG. 6. , Fig. 10a, Fig. 10b, Fig. 10c are explanatory diagrams for assembling the accessory device, Fig. 11 and Fig. 12 are explanatory diagrams for attaching the accessory device to the circuit and disconnector body, and Fig. 13 is an explanatory diagram FIG. 14 is a perspective view of the cover shown in FIG. 3, and FIGS. 15 and 16 are perspective views of conventional circuit breakers. In the figure, 1 is a base, 2 is a fixed contact conductor, 3 is a fixed contact, 5 is a movable contact, 6 is a movable contact conductor, 7 is a push plate, 7a is a convex portion, 8 is an operating handle, and 9 is a Opening/closing mechanism part, 10 is a opening spring, 11
is a cover, 11a is an opening, 11b is an opening, 11
i is a locking recess, 12 is an accessory device, 12A is a base,
12b is a surface plate, 12c is a surface wall portion, 12d, 1
2e is a pair of side walls, 12f is a back wall, 12g
12C is a pair of engagement protrusions, 12C is a core, 12h is a long hole, 12i is a lead wire hole, 12B is a micro switch, 12j is a mounting hole, 12k is a snap fit, 12l is a locking protrusion, 12m is a connection terminal ,1
2n is a protrusion, 12o is a fitting hole, 12p is a stepped part,
12q is a contact plate, 12r is a hole, 12s is an engagement recess,
12t is a lead wire hole, 12D is a deactivator,
12u is an actuation plate shaft, 12v is an actuation plate, 12w is a leaf spring, 13 is a lead wire, 14 is a mounting screw, 15 is a lid, 15a is a mounting hole, 15b is an engaging protrusion, 17 is a mounting base, and 17a is a communication hole, 17b is the bottom wall, 17c
is the back wall, 17d is the side wall, 17e is the vertical hole, 17f
is the outer wall, 17g is the convex portion, 17h is the locking recess, 1
7i is a mounting hole, 18 is a holding plate, and 19 is a nut. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Claims for Utility Model Registration] (1) A base made of an insulating member and supporting the constituent members of the disconnector, a cover made of an insulating member that covers the constituent members and constitutes a casing together with the base;
An operating handle for manually operating the component member with an operating portion protruding outward from an opening formed in the upper surface of the cover; a recessed hole provided in the cover having an opening only on a side surface of the cover; A support having a plurality of walls that stably supports an accessory device inserted into the recessed hole, a plurality of walls that stably supports the accessory device inserted into the cover, and a wall that isolates the accessory device from a certain portion of the component. A circuit breaker comprising a stand and a communication hole drilled in the bottom of the support stand into which a press plate is inserted for operating the accessory device and the component in cooperation. (2) The circuit breaker and circuit breaker according to claim 1, wherein the opening is formed on a side surface of the cover parallel to the operating direction of the operating handle.