JPS6136048Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to circuits and disconnectors, and more particularly to a mounting device for auxiliary equipment including auxiliary equipment in circuits and disconnectors.

The attachment of auxiliary devices including auxiliary equipment to conventional circuit breakers and breakers has been such that they are assembled within a cover 2 that covers a base 1 of the circuit breaker, as shown in FIG. That is, each component of the circuit shield or breaker assembled on a base 1 made of molded insulating material is covered with a cover 2 also made of molded insulating material, and the structure of the circuit shield or breaker is as follows. A fixed conductor 3 disposed on the base 1 and having one end connected to an external conductor and a fixed contact 4 provided at the other end, a movable conductor 5 having a movable contact 6 facing the fixed contact 4, and a cross-sectional A movable cross bar 8 formed in a letter shape and connected to an opening/closing mechanism (not shown) is fitted to one end thereof, and the movable conductor 5 is pivotally connected to the other end so as to be rotatable in a direction in which the movable conductor 5 approaches and separates from the fixed conductor 3. Occurs when the arm 7, the compression spring 9 interposed between the movable conductor 5 and the protrusion 7A extending at the tip of the movable arm 7, and the fixed contact 4 and the movable contact 6 come into contact with each other. an arc extinguishing device 10 for extinguishing an arc, a connecting conductor 12 provided on the base 1 and having one end connected to the movable conductor 5 via a flexible conductor 11, and a connecting conductor 12 attached to the other end of the connecting conductor 12. an automatic opening/closing device 13 that operates an opening/closing mechanism (not shown) in response to overcurrent; and the base 1.
A terminal 15 is disposed above and connected to the automatic opening/closing device 13 by a flexible conductor 14.

The auxiliary device 16 is formed in an L shape and includes a mounting frame 16A whose one side is fixed to a fixed portion by a tightening screw 17, and a micro switch 16B attached to the mounting frame 16A.

In FIG. 1, reference numeral 18 denotes a handle, and by moving it in the left-right direction in the figure, the movable arm 7 is rotated around the crossbar 8 via an opening/closing mechanism (not shown), and the fixed contact 4 and the movable contact 6 are connected. It opens and closes.

Next, regarding the operation of the circuit breakers and circuit breakers having the above configuration, when the movable contact 6 of the movable conductor 5 shown in the first figure and the fixed contact 4 of the fixed conductor 3 are separated, the movable arm 7 is connected to the attached device. 16 microswitches 16B are pressed. That is, the microswitch 16B is opened or closed via the switch portion, and the signal is interrupted or conducted. Next, when the handle 18 is operated to rotate the crossbar 8 via an opening/closing mechanism (not shown), the movable arm 7 approaches the fixed conductor 3, and the fixed contact 4 and the movable contact 6 come into contact with each other. In this process, the movable arm 7 is disengaged from the micro switch 16B,
As a result, the switch section of the microswitch 16B operates to either cut off or conduct the signal. In addition, a state in which the fixed contact 3 and the movable contact 6 are in contact with each other,
That is, even if an overcurrent flows when the circuit or disconnector is on and the movable arm 7 is rotated by the automatic opening/closing device 13 via the opening/closing mechanism (not shown), the relative operation between the micro switch 16B and the movable arm 7 will continue as described above. The same operation as in the case of is repeated.

However, in the circuit/disconnector having the above configuration, since the attachment device 16 is installed inside the base 1 and the cover 2, it is necessary to remove the cover 2 during the installation/removal work of the attachment device 16. As a result, there are disadvantages such as foreign matter entering the circuit or disconnector, and parts falling inside. Further, since the micro switch 16B is exposed within the cover 2, there is a problem that the micro switch 16B is damaged by the arc generated by opening and closing the fixed contact 4 and the movable contact 6.

The present invention has been developed by focusing on the above-mentioned conventional problems, and has improved the mounting structure of microswitches and other auxiliary devices to facilitate the installation and removal work, as well as to prevent damage caused by arcing. The purpose of this invention is to provide a device for attaching an accessory device to a container.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 6, with the same reference numerals assigned to parts common to those in FIG. 1.

A recess 19 having an L-shaped cross section perpendicular to the operating direction of the handle 18 is formed on the upper surface of the cover 2, and a vertical insertion groove 4 and a cover engaging portion are formed in opposing side walls 19B of the recess 19. 19C and 19C are formed. Further, the bottom surface 19A of the recess 19 is formed with a screw hole (mounting frame fixing portion) 19D and a through hole (plunger through hole) 19E.

A mounting frame 20 for supporting the micro switch 16B is fixed on the bottom surface 19A of the recess 19 by a tightening screw 21 screwed into the screw hole 19D.

A guide member 22 is fitted into the through hole 19E, and one end of the guide member 22 is positioned in the direction of the movable arm 7, and the other end is positioned in the direction of the micro switch 16B, so that the operation of the movable arm 7 is controlled by the micro switch. A plunger 23 for transmitting data to 16B is inserted therethrough.

The recess 19 is covered with an L-shaped cover 24 as shown in FIG. 5, and a protrusion ( The engaging portion 24A is fitted into the insertion groove 19C by engaging with the insertion groove 19C.
Note that the shield cover 24 is preferably installed when no accessory device is attached to the recess 19.

Next, the assembly of the auxiliary device 16 based on the above configuration will be explained.

First, the guide member 22 is fitted into the through hole 19E formed in the bottom surface 19A of the recess 19 of the cover 2, and then the plunger 23 is inserted into the guide member 22.
The assembly of the cover 2 and plunger 23 is completed by fitting and inserting them.

Next, the mounting frame 20 to which the micro switch 16B is attached in advance is inserted into the recess 19 from the outside of the cover 2, and the tightening screw 21 is screwed into the screw hole 19D and tightened, thereby fixing the mounting frame 20. The assembly of the so-called auxiliary device 16 is completed.

For example, if an auxiliary auxiliary device that displays ON, OFF, or OFF is installed in the recess 19 on one side of the cover 2, or an alarm auxiliary device that displays the trip status of a circuit or disconnector, the other side recess 1
Insertion groove 19 formed in side walls 19B, 19B of 9
C, 19C, the projection 24A of the shingle cover 24 is inserted to close the recess 19.

Next, the operation of the circuit breaker having the above configuration will be explained.

As shown in FIG. 2, a fixed contact 4 and a movable contact 6
When the plunger 23 is in the open state, one end of the plunger 23 is in contact with the movable arm 7, and the other end is pressing the switch operating piece of the micro switch 16B, thereby opening or closing the micro switch 16B.

When the handle 18 is moved from this state, the movable arm 7 rotates clockwise in the figure via an opening/closing mechanism (not shown). Accordingly, the pressing force of the movable arm 7 pressing one end of the plunger 23 is released, so that the micro switch 16B in contact with the other end of the plunger 23 is opened or closed.

As explained above, the attachment device for circuit breakers and disconnectors according to the present invention can be installed from the outside of the cover, so after the components of the circuit breakers and breakers have been assembled on the base, the auxiliary devices can be attached to the circuit breakers and disconnectors. can be installed without removing the cover, which prevents foreign matter from entering the circuit or the circuit breaker, and at the same time, the arc generated by the opening and closing of the fixed and movable contacts is cut off by the cover. Therefore, damage to attached equipment due to this arc is prevented. In addition, since the recess is more shielded than the edge or the cover, it has various effects such as the fact that even if the cover has a recess, it does not impair the appearance of the circuit or disconnector.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing how an auxiliary device is attached to a conventional circuit breaker, and FIG. 2 is a longitudinal sectional side view showing an embodiment of an auxiliary device mounting device in a circuit breaker according to the present invention. Fig. 3 is a partial front view showing the arrangement relationship between the micro switch and plunger in Fig. 2, Fig. 4 is a perspective view of the cover in Fig. 2, Fig. 5 is a perspective view of the armrest and cover, Fig. 6 FIG. 2 is a perspective view of the appearance of the cover with the shingle cover fitted over the cover. DESCRIPTION OF SYMBOLS 1...Base, 2...Cover, 3...Fixed conductor, 4...Fixed contact, 5...Movable conductor, 6...Movable contact, 7...Movable arm, 7A...Protrusion, 8...
Cross par, 9... compression spring, 10... arc extinguishing device, 13... automatic opening/closing device, 16... auxiliary device,
16A...Mounting frame, 16B...Micro switch, 17...Tightening screw, 18...Handle, 19
... recess, 19A ... bottom, 19B ... side wall, 1
9C...Insertion groove (shiya cover engagement part), 19D...
Screw hole (mounting frame fixing part), 19E... through hole (plunger through hole), 20... mounting frame, 21... tightening screw, 22... guide member, 23... plunger, 24... shield Lid, 24A...Protrusion (engaging part).

Claims (1)

[Scope of utility model registration request] A base made of molded insulating material on which components for circuits and disconnectors are installed, a cover made of molded insulating material and covering the base to form a casing, and the vicinity of the opening/closing handle protruding from this cover. A recess formed on the outer surface of the cover, a mounting frame fixing part such as a hole formed in the bottom of the recess, a plunger through hole, and a shield such as an insertion groove formed in a predetermined direction inside the recess. a micro switch attached to a mounting frame fixed in the recess through the mounting frame fixing part; a plunger, the other end of which is positioned in the direction of the movable arm and the other end in the direction of the microswitch, transmits the operation of the movable arm to the microswitch; and an engagement part that engages with the edge of the recess and the cover engagement part. A mounting device for an auxiliary device in a circuit or disconnection device, comprising a cover that detachably engages with the recessed portion and covers the recessed portion.