JPH04162326A - Fitting device for circuit breaker - Google Patents

Abstract

PURPOSE:To surely fit a circuit breaker to a rail fitting plate by inserting fitting bars of the rail fitting plate into fitting holes of the circuit breaker, inserting mandrels into bar core holes, and expanding and holding the tip expansion sections of the fitting bars with the mandrels. CONSTITUTION:Fitting holes 10 penetrated from the back face 3b to the front face 3a are provided on the case of a circuit breaker 3, narrow sections are formed in the middle of the fitting holes 10, and hook step sections 11a are formed on the upper face. Fitting bars 12 are provided on a rail fitting plate 5 by integral molding with thermoplastic resin such as plastic, and expansion sections 12a are provided at the tip. When the circuit breaker 3 is to be fitted to the rail fitting plate 5, the fitting bars 12 are inserted into the fitting holes 10, and the rail fitting plate 5 is stuck to the case back face 3b of the circuit breaker 3. Mandrels 14 are inserted toward the front face 3a to the positions where step sections match, then the fitting is completed. The mandrels 14 expand the expansion sections 12a, the expansion sections 12a are not narrowed, and the hook step sections 11a are surely hooked.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mounting device for mounting a circuit breaker on a distribution board, switchboard, etc. [Prior Art] It is a side view showing a conventional circuit breaker mounting device shown in Publication No. 58-163123,
In the figure, (1) is the panel surface of a distribution board or switchboard, (2)
is a gutter-like rail laid on the panel surface (1), and (3) is a well-known molded case type circuit breaker, with the front side of the case (3a)
An operation handle (4) is provided protruding from the top. (5) is a rail mounting plate attached to the back surface (3b) of the case, which has both arms (5a) extending to both end surfaces (3c) of the case, and is integrally molded from thermoplastic resin such as plastic. (6
) is the rail mounting plate (5) so that the rail (2) can be fitted into it.
), the four parts (7) are clamping members for clamping the rail (2) fitted into the recess (6), and the locking piece (7a)
and a push spring (7b). (8) is a stepped portion formed on both end surfaces (3c) of the case of the circuit breaker (3), and is a stepped portion formed on both end surfaces (3c) of the case of the circuit breaker (3).
) is arranged so as to be locked in the mounted state, and as shown in FIG. 3, the circuit breaker (3) is gripped by the elastic force of both arms (5a) and attached to the rail mounting plate (5), The rail mounting plate (5) is fixed to the rail (2) by a locking piece (7a) pressed by a push spring (7b).

[Problems to be Solved by the Invention] In the conventional circuit breaker mounting device as described above, the circuit breaker (3) is attached to the rail mounting plate (5) by snapping both arms (5a) of the rail mounting plate (5). 5), so if the circuit breaker (3) becomes larger in size or heavier, the elastic force of both arms (5a) will not be able to grip it completely, and the circuit breaker (3) will be attached to the rail. There was a problem that it came off from the mounting plate (5).

The present invention has been made to solve these problems, and an object of the present invention is to provide a highly reliable circuit breaker mounting device that can easily and reliably mount a circuit breaker to a rail mounting plate.

[Means to solve the problem]

In order to achieve the above object, a circuit breaker mounting device according to the present invention includes a mounting hole provided in a case of a circuit breaker so as to penetrate from the back side to the front thereof, and a mounting hole provided protrudingly on a rail mounting plate. A mounting rod inserted into the mounting hole, a rod center hole formed so as to pass through from the rail mounting plate along the inside of the mounting rod, and a tip end of the mounting rod formed in the mounting hole expanding in the installed state. and a mandrel that is inserted into the rod center hole and prevents the distal end expansion part from shrinking.

[Function] In this invention, when the mounting rod of the rail mounting plate is inserted into the mounting hole of the circuit breaker and then the mandrel is inserted into the rod center hole, the expanded end portion of the mounting rod is pushed and expanded by the mandrel. Since the mounting rod is held in this state and does not collapse, the extended end portion of the mounting rod is firmly locked to the locking step, and the circuit breaker is reliably mounted on the rail mounting plate.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a partially cutaway side view, and FIG. 2 is an enlarged view of the broken portion in FIG. 1. Portions that are the same as or equivalent to those of the conventional device are designated by the same reference numerals, and description thereof will be omitted. In the figure, (10) is attached to the back side (3b) of the circuit breaker (3) case.
) to the front (3a), a mounting hole (
11) is a narrowed part provided in the middle of the mounting hole (10), and a locking step part (lla) is formed on the upper surface. (12) is a mounting rod that protrudes from the rail mounting plate (5) by integral molding of thermoplastic resin such as plastic, and has an extension part (
12a). (13) is a rod center hole provided along the inside of the mounting rod (12) so as to penetrate from the rail mounting plate (5), and has a stepped portion (13a) formed in the middle. (1
4) is a mandrel to be inserted into the rod center hole (13), and in the attachment position where the step (14a) on the midsection engages with the step (13a) of the rod center hole (13), the tip of the rod is inserted into the rod center hole (13). 12) extension (1
2a) is being pushed and expanded. (15) is a recess provided at the tip of the mandrel (14), which guides the tip of the push rod (16) used when removing the rail mounting plate (5).

The circuit breaker (3) is attached to the rail (
From the state shown in Fig. 1 attached to the clamping member (7)
) to remove it from the rail (2). When the push rod (16) is inserted into the mounting hole (10) of the removed circuit breaker (3) as shown in Figure 2 and is guided into the recess (15), it will fit as shown by the arrow (17). Push in the mandrel (1
4) from the rod center hole (13). When the mandrel (14) is removed, the extended part (12a) tends to shrink, so if you peel off the rail mounting plate (5) a little forcefully, the extended part (12a) will shrink and the mounting rod (12) will come out of the mounting hole (10). , the rail mounting plate (5) is removed from the circuit breaker (3).

Conversely, when attaching the rail mounting plate (5) to the circuit breaker (3), insert the mounting rod (12) into the mounting hole (10) and attach the rail mounting plate (5) to the back of the case of the circuit breaker (3). (3b.), the extended portion (12a) is locked to the locking step portion (lla) with a snap. In this state, the mandrel (
14) in the direction of the arrow (18), and remove the stepped part (14a).
, (13a) are inserted to the position where they match, and the installation is completed. The installation state in which the mandrel (14) is inserted in this way is shown in Figures 1 and 2, and in this state, the mandrel (14) is inserted.
4) pushes and expands the expanded portion (12a), so the expanded portion (12a) does not collapse and is securely locked to the locking stepped portion (lla).

〔Effect of the invention〕

As described above, according to the present invention, there is an effect that a circuit breaker can be easily and reliably attached to a rail mounting plate, and high reliability can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention;
FIG. 2 is an enlarged view of the broken portion of FIG. 1, and FIG. 3 is a side view of the conventional one. In the figure, (2) is the rail, (3) is the circuit breaker, (
3a) is the front of the case, (3b) is the back of the case, (4) is the operation handle, (5) is the rail mounting plate, (6) is the recess,
(10) is a mounting hole, (11a) is a locking step, (12) is a mounting rod, (12a) is an expanded tip, (13) is a rod center hole,
(14) indicates the mandrel. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A circuit breaker with an operation handle protruding from the front of the case, a rail mounting plate attached to the back of the case of this circuit breaker, and a clamping member that fits and clamps the rail into the recess of the rail mounting plate. A circuit breaker mounting device comprising: a mounting hole provided in the case so as to penetrate from the back side to the front thereof; a mounting rod protruding from the rail mounting plate and inserted into the mounting hole; a rod center hole formed so as to penetrate from the rail mounting plate along the inside of the mounting rod; and a locking step formed in the mounting hole to which the distal end extension portion of the mounting rod locks in the installed state. . A mounting device for a circuit breaker, comprising: a mandrel inserted into the mandrel hole to prevent the expanded end portion from shrinking.