JPH08329817A - Mounting frame for circuit breaker - Google Patents

Abstract

PURPOSE: To suppress the costs by constructing a mounting frame which can serve commonly for different types of circuit breakers. CONSTITUTION: A mounting frame 22 is constructed from a left-hand segment 31 and a right-hand segment 32. The left-hand segment 31 is composed of a side wall 29, left flange 33, and left bottom wall forming part 34, while the right-hand 32 is composed of a side wall 30, right flange 35, and right bottom wall forming part 36. Two rows of detaining holes 38 on the left and right are formed fore and aft on the receptacle surface 34a of the left bottom wall part 34, and a detent projections 39 mating with the holes 38 are formed on the oversurface of the receptacle surface 36a of the right bottom wall part 36. The left segment 31 and right segment 32 are consolidated by welding, etc., in the condition that the left and right parts 34, 36 are lapped. The width of the bottom wall part 28 can be regulated in three steps complying with three types of circuit breakers 21, i.e., for two, three, and four electrodes, by adjusting the lapping width of the parts 34 and 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker mounting frame for mounting a circuit breaker on a mounting base.

[0002]

2. Description of the Related Art Conventionally, a mounting frame as shown in FIGS. 13 to 15 has been used for mounting a circuit breaker on a mounting plate of a switchboard, for example. That is, as shown in FIGS. 13 and 14, the circuit breaker 1 is provided with a contact opening / closing mechanism (not shown), a trip device, an arc extinguishing device, etc. in an insulating case 2 having a substantially rectangular box shape. A handle 3 for opening and closing the contacts from the outside is provided on the upper surface. Further, a plurality of studs 4 connected to internal terminals are provided at both ends of the bottom surface of the insulating case 2 so as to extend downward, and the external conductors 5 on the power supply side and the load side are connected to the studs 4. It is like this.

On the other hand, the mounting frame 6 is made of, for example, a metal plate, and has a bottom wall portion 7 that receives the central portion of the bottom surface of the insulating case 2 of the circuit breaker 1, and rises upward from both left and right end portions of the bottom wall portion 7, A pair of side wall portions 8 and 8 (see FIG. 14) arranged outside the left and right side surfaces of the insulating case 2 and flange portions 9 and 9 provided at the upper ends of the side wall portions 8 and 8.
And are integrally formed. Further, as shown in FIGS. 13 and 15, the bottom wall portion 7 is formed with a plurality of screw fastening holes 7a, and each flange portion 9 is also provided with a plurality of screw fastening holes 9a. There is.

Thus, the circuit breaker 1 becomes the insulating case 2
The bottom surface of is attached to the mounting frame 6 by being screwed through the screwing holes 7a of the bottom wall portion 7, and in this state, is fitted into the opening portion 10a formed in the mounting plate 10 of the switchboard. At this time, the flange portions 9 and 9 are in a state of being applied to the edge portion of the opening 10a of the mounting plate 10, and in this state, the mounting frame 6 passes through the screwing holes 9a of the flange portions 9 and the mounting plate. It is screwed and attached to 10. A decorative plate 11 is fitted to the flange portion 9 of the mounting frame 6 so as to cover the upper surface of the circuit breaker 1.

[0005]

The circuit breaker 1 as described above is generally divided into two poles, three poles and four poles, each having different width dimensions. Therefore, conventionally, as shown in FIG. 15, the mounting frame 6 also has a width of 2 poles (see (a)), 3 poles (see (b)), 4 poles (see (c)). I had to prepare several kinds of things with different dimensions.

Although not shown, the circuit breaker 1 is
The size (the length in the longitudinal direction of the insulating case 2) also varies depending on the difference in AF (current capacity), and the screwing position for the bottom wall portion 7 also differs. For this reason,
Conventionally, it is necessary to use a plurality of types of mounting frames 6 having different positions of the screw holes 7a corresponding to the difference in AF of the circuit breaker 1.

As described above, conventionally, a plurality of types of mounting frames 6 having specifications according to the type of circuit breaker are required, and the number of types of mounting frames is large and the stock is large, so that the management is troublesome and the mounting is difficult. There is a drawback in that the frame is manufactured in a small quantity and in a large variety, and a large number of molds are required for manufacturing, which increases the manufacturing cost.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a circuit breaker mounting frame which can be commonly used for different kinds of circuit breakers and can reduce the cost. To provide.

[0009]

SUMMARY OF THE INVENTION A circuit breaker mounting frame according to the present invention includes a bottom wall portion for receiving the bottom surface of the circuit breaker and mounting the circuit breaker, and rising circuit breakers from both sides of the bottom wall portion. A pair of side wall portions located outside both side surfaces of the container and attached to the mounting base, the bottom wall constituting portion being at least a part of the bottom wall portion, and one side wall portion. 2 in which the whole is divided at the bottom wall
It is characterized by being configured by combining individual divided bodies (the invention of claim 1).

At this time, the bottom wall constituting portions of the two divided bodies are constructed so that at least a part thereof overlaps with each other, and the width dimension of the bottom wall portion can be adjusted by adjusting the overlapping width (( The invention of claim 2). Further, in the case where the circuit breaker is attached to the screw-fastened portion of the bottom wall portion by screwing, it is more effective if the screw-fastened portion of the bottom wall portion is formed at a plurality of positions (claim Invention of 3). Furthermore,
A reinforcing member may be attached to the bottom wall portion so as to straddle both bottom wall constituent portions (the invention of claim 4).

[0011]

According to the mounting frame for a circuit breaker of the first aspect of the present invention, by combining two divided bodies each having a bottom wall constituting portion and one side wall portion, the bottom wall portion and a pair of side walls are formed. And a part. In this case, since it is constituted by a combination of divided bodies, at least the type of divided body can be adapted to more types of circuit breakers by changing the combination method. .

At this time, if the bottom wall constituting portions of the two divided bodies are constituted so that at least a part thereof overlaps with each other, and the width dimension of the bottom wall portion can be adjusted by adjusting the overlapping width (claim According to the second aspect of the present invention), only by changing the overlapping width of the two divided bodies, it becomes possible to deal with various circuit breakers having different width dimensions.

Further, in the case where the circuit breaker is attached to the screwed portion of the bottom wall portion by screwing, the screwed portion of the bottom wall portion may be formed at a plurality of places (the invention of claim 3). ), By selectively using the screw fastening portion, it becomes possible to deal with various circuit breakers having different screw fastening positions.

Furthermore, if the reinforcing member is attached to the bottom wall portion so as to extend over both bottom wall constituent portions (the invention of claim 4), the bottom wall portion must have sufficient strength. It will also be possible to support large circuit breakers.

[0015]

EXAMPLES Some examples of the present invention will be described below.
Description will be made with reference to FIGS. 1 to 12. (1) First Embodiment First, a first embodiment (corresponding to claims 1 and 2) of the present invention will be described with reference to FIGS. 1 to 5. 3 and 4 show a circuit breaker 21 with a mounting frame 22 according to the present embodiment.
Is attached to the mounting plate 23 of the switchboard as the mounting base by using.

Here, the circuit breaker 21 will be briefly described. The circuit breaker 21 opens and closes a current-carrying path between internal terminals (not shown) in an insulating case 24 having a substantially rectangular box shape as a whole. Contact opening and closing mechanism, trip device that forcibly opens the contact when overcurrent flows in the energizing path,
An arc extinguishing device that quickly extinguishes the arc generated between the contacts is provided, and a handle 25 for opening and closing the contacts from the outside is provided on the upper surface thereof. Further, on the bottom surface of the insulating case 24, there is formed a protruding portion 24a that protrudes downward by a slight amount at an intermediate portion excluding both left and right end portions in FIG.

A plurality of studs 26 connected to internal terminals are provided at the end of the bottom surface of the insulating case 24 so as to extend downward, and the studs 26 are provided with external conductors 27 on the power supply side and the load side. It is supposed to be connected.
The circuit breaker 21 has two poles, three poles, and four poles, and the width dimensions (horizontal dimension in FIG. 4) of the insulating case 24 are different from each other. In addition, the circuit breaker 21 is
The size of the insulating case 24 also varies depending on the difference in (current capacity), and the screwing position, which will be described later, also varies. In this way, the circuit breaker 21 has the insulating case 2
There are a plurality of types of four different sizes.

Now, the mounting frame 22 according to this embodiment will be described with reference to FIGS. 1, 2 and 5. The mounting frame 22 is made of, for example, a metal plate, and as a whole,
The bottom wall portion 2 for receiving the bottom surface of the insulating case 24 of the circuit breaker 21 and mounting the circuit breaker 21 by screwing
8 and the insulating wall 24 rising from both sides of the bottom wall 28.
And a pair of side wall portions 29 and 30 positioned outside both side surfaces (left and right side surfaces in FIG. 4) of the.

At this time, as shown in FIGS. 1 and 2, the mounting frame 22 is constructed by combining a left-side division body 31 and a right-side division body 32, which is formed by dividing the whole body into left and right sides in the drawing. Has become. Of these, the left division 31
Includes a side wall portion 29, a left flange portion 33 extending outward (leftward in the figure) from the upper end of the side wall portion 29, and a part of the bottom wall portion 28 extending from the lower end of the side wall portion 29 to the right side in the figure. The left bottom wall forming part 34 is integrally formed.

On the other hand, the right divided body 32 has a side wall portion 30,
A right flange portion 35 extending from the upper end of the side wall portion 30 to the right in the figure and a right bottom wall forming portion 36 extending from the lower end of the side wall portion 30 to the right in the figure and forming a part of the bottom wall portion 28 are integrated. It is configured to have. In addition, the left and right flange portions 33, 35
Two screw insertion holes 33a and 35a for attaching the attachment frame 22 (circuit breaker 21) to the attachment plate 23 are formed in each. Further, the left and right flange portions 33, 35
Standing portions 33b and 35b, to which a decorative plate 37 (see FIGS. 3 and 4) is fitted and screwed, are integrally formed at front and rear ends thereof.

Then, the left bottom wall forming portion 3 of the left divided body 31.
4 is a receiving surface portion 3 that receives the protruding portion 24 a of the insulating case 24.
4a is formed integrally with an extending piece portion 34b which is located higher than the extending piece 4a, and a screw hole 34c serving as a screwing portion is formed in the extending piece portion 34b. Further, in the receiving surface portion 34a, a total of four engaging holes 38 are formed in the front and rear, in two rows in the left and right.

On the other hand, the right bottom wall forming portion 36 of the right divided body 32.
Is a receiving surface portion 36 that receives the protruding portion 24 a of the insulating case 24.
Before and after a, it is configured to have an extending piece portion 36b that is located one step higher than that and has a screw hole 36c that is a screwing portion. In this case, the right bottom wall forming part 36 is located lower than the left bottom wall forming part 34 by the plate thickness, and the left bottom wall forming part 34 is
Is configured to overlap the lower surface side of the. Further, on the upper surface of the receiving surface portion 36a, two engaging projections 39 are formed in the front and rear and two rows in the left and right corresponding to the four engaging holes 38.
The engagement protrusion 39 is formed with a protrusion height dimension substantially equal to the plate thickness of the left bottom wall forming portion 34.

The left-side division body 31 and the right-side division body 32 are integrated by, for example, welding the left bottom wall forming portion 34 and the right bottom wall forming portion 36 in a lapped state. The mounting frame 22 is thus configured. Further, the left bottom wall constituent part 34 and the right bottom wall constituent part 36 may be screwed together. In this case, the bottom wall portion 28 is constituted by the left bottom wall constituent portion 34 and the right bottom wall constituent portion 36, but at this time, a step corresponding to the plate thickness occurs between the extending piece portions 34b and 36b. A spacer 40 (shown only in FIG. 2) is provided on the extending piece portion 36b.

When the mounting frame 22 is constructed as described above, the width dimension of the bottom wall portion 28 is adjusted by adjusting the wrap width (overlap width) of the left bottom wall constituting portion 34 and the right bottom wall constituting portion 36. Can be adjusted. In this embodiment, it is possible to adjust the width dimension of the bottom wall portion 28 in three steps corresponding to the three types of circuit breakers 21 for two poles, three poles, and four poles. The adjustment makes it possible to obtain the mounting frame 22 having the bottom wall portion 28 having a desired width dimension.

That is, there are three types of circuit breakers, one for two poles, the other for three poles, and the other for four poles, and the width dimension of the insulating case 24 is gradually increased in that order. As shown in FIGS. 1 and 2, by wrapping the right bottom edge of the left bottom wall forming portion 34 at the position where the right end edge portion of the right bottom wall forming portion 36 is brought into contact with the engaging protrusion 39 of the left row. The bottom wall portion 28 having a width dimension corresponding to the circuit breaker 21 for four poles can be obtained.

Further, as shown in FIG. 5 (a), at the position where all the engaging projections 39 of the right bottom wall forming portion 36 are fitted into all the engaging holes 38 of the left bottom wall forming portion 34. By wrapping the two together, a bottom wall portion 28 having a width dimension corresponding to the circuit breaker 21 for two poles can be obtained. Further, as shown in FIG. 5B, the left bottom wall forming portion 3
Corresponding to the circuit breaker 21 for 3 poles by wrapping both of them at the position where the engaging projection 39 of the left row of the right bottom wall forming portion 36 is fitted into the engaging hole 38 of the right row 4 of FIG. It is possible to obtain the bottom wall portion 28 having the above width dimension.

In mounting the circuit breaker 21 on the mounting plate 23 of the switchboard in the above structure, first, as described above, the left side division is made in a state corresponding to the number of poles of the circuit breaker 21 (width dimension of the insulating case 24). Body 31 and right divided body 32
The mounting frame 22 is configured by combining and. Next, the circuit breaker 21 is placed on the bottom wall portion 28 of the mounting frame 22,
The insulating case 24 is screwed through the screw holes 34c and 36c.

Then, in this state, the circuit breaker 21 supported by the mounting frame 22 is fitted into the opening 23a (see FIG. 4) of the mounting plate 23 from above, and the left and right flange portions 33,
At 35, it is screwed to the mounting plate 23. Finally, the decorative plate 37 is attached to the rising portions 33b, 3 of the flange portions 33, 35.
The mounting is completed by fitting it into 5b and screwing.

As described above, according to this embodiment, the mounting frame 22 is constructed by combining the two divided bodies 31, 32, and the bottom wall forming portion 3 of the divided bodies 31, 32 is formed.
By changing the wrap width of 4, 36, the bottom wall 28
Since the width dimension of is changed, it becomes possible to share the divided bodies 31 and 32 with the three types of circuit breakers 21 having different numbers of poles.

As a result, unlike the conventional one in which a plurality of mounting frames 6 corresponding to the type of the circuit breaker 1 are required, the required number of types of the divided bodies 31, 32 can be reduced, and management is possible. It is easy, and a small variety of divided bodies 31,
32 can be manufactured in large quantities, and the number of molds for manufacturing can be reduced.
Therefore, it is possible to significantly reduce the cost.

Further, particularly in this embodiment, since the engaging holes 38 and the engaging projections 39 corresponding to the lap width are formed in the left and right bottom wall constituting portions 34 and 36, the divided bodies 31, 3 are formed.
It is also possible to obtain an advantage that it is possible to easily perform the positioning and the like when combining the two.

(2) Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 6 to 8. This embodiment also corresponds to claims 1 and 2. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted, and only different points will be described below.

The mounting frame 41 according to this embodiment is also constructed by combining the left side divided body 42 and the right side divided body 43. The left divided body 42 has a left flange portion 33 at the upper end of the side wall portion 29 and a left bottom wall forming portion 44 that extends rightward from the lower end of the side wall portion 29 in the drawing. On the other hand, the right divided body 43 has a right flange portion 35 at the upper end of the side wall portion 30, and integrally has a right bottom wall forming portion 45 extending from the lower end of the side wall portion 30 to the left in the figure.

In this case, the left bottom wall forming portion 44 has an extending piece portion 44b having a screw hole 44c which is located one step higher than the receiving surface portion 44a which receives the protruding portion 24a of the insulating case 24 and which is higher than the receiving surface portion 44a. Is configured. Also,
The right bottom wall forming portion 45 is the extension piece portion 44 of the receiving surface portion 45a.
It is arranged on the side opposite to b and has an extending piece portion 45b having a screw hole 45c. The left bottom wall forming portion 44 and the right bottom wall forming portion 45 are configured to be wrapped with the left bottom wall forming portion 44 facing upward.

The receiving surface portion 45a of the right bottom wall forming portion 45
Is formed with a slide hole 46 which is located at a substantially middle portion in the front-rear direction and which is open at the left end and extends in the entire left-right direction. Further, two sandwiching pieces 47 are integrally provided so as to project the upper portion of the receiving surface portion 45a toward the receiving surface portion 45a side from both left and right ends of the extending piece portion 45b of the right bottom wall forming portion 45. When the left bottom wall forming portion 44 is wrapped on the upper surface of the right bottom wall forming portion 45, the sandwiching piece 47 causes the end portion of the receiving surface portion 44a to move toward the receiving surface portion 45.
It is designed to be sandwiched with a.

Further, the receiving surface portion 44a of the left bottom wall forming portion 44 is squeezed to the lower surface side of the receiving surface portion 45a through the slide hole 46 and is sandwiched so as to sandwich the receiving surface portion 45a with the receiving surface portion 44a. The piece 48 is integrally formed (cut and raised) at three positions, that is, both left and right ends and an intermediate part. Further, the lower portion of the receiving surface portion 44a is projected from the left and right ends of the extending piece portion 44b of the left bottom wall forming portion 44 toward the receiving surface portion 44a.
The individual holding pieces 49 are integrally provided. This sandwiching piece 4
When the right bottom wall forming portion 45 is wrapped around the lower surface of the left bottom wall forming portion 44, the end portion of the receiving surface portion 45a is changed to the receiving surface portion 44a.
It is designed to be sandwiched between

In this structure, the left bottom wall forming portion 44
The right bottom wall component 45 and the right bottom wall component 45 are sandwiched between each other so as to be slidable in the left-right direction, facilitating the alignment in the front-rear direction at the time of combination, and preliminarily the left-side division body 42 and the right-side division body 43. And can be slidably integrated, and then the wrap width can be adjusted and fixed while sliding them, thereby improving workability. In addition, it is of course possible to obtain the same effect as that of the first embodiment, in which the divided bodies 42 and 43 can be shared by the circuit breakers 21 of different types, and the cost can be reduced. Is.

(3) Third Embodiment Next, a third embodiment of the present invention (corresponding to claims 1, 2 and 3) will be described with reference to FIGS. 9 and 10. Also in this case, the same parts as those of the first embodiment will be designated by the same reference numerals, detailed description thereof will be omitted, and only different points will be described below.

The mounting frame 51 according to this embodiment is also constructed by combining the left divided body 52 and the right divided body 53. The left divided body 52 has a left flange portion 33 at the upper end of the side wall portion 29, and an integral left bottom wall forming portion 54 extending rightward in the drawing from the lower end of the side wall portion 29. On the other hand, the right divided body 53 has the right flange portion 35 at the upper end of the side wall portion 30 and integrally has the right bottom wall forming portion 55 extending from the lower end of the side wall portion 30 to the left in the figure.

The left bottom wall forming portion 54 integrally has an extending piece portion 54b located one step higher than the receiving surface portion 54a for receiving the protruding portion 24a of the insulating case 24, and further, The extending piece portion 54b is formed with a screw hole 54c which is a screwing portion. At this time, screw holes 5
4c are formed at a plurality of locations, in this case two locations at the front and rear. On the other hand, the right bottom wall forming portion 55 also has an extending piece portion 5 in which screw holes 55c which are screwing portions are formed in front of and behind the receiving surface portion 55a.
5b, and the screw hole 55c is formed at two front and rear positions.

In such a configuration, the circuit breaker 21
Screw holes 54c, 55 for mounting (insulation case 24)
c can be selectively used. Here, the circuit breaker 21 also has a different size and a screwed position with respect to the bottom wall portion 28 due to a difference in AF (current capacity). According to this embodiment, even one type of mounting frame 51 can be adapted to various circuit breakers 21 having different screwing positions. Further, by adjusting the wrap width of the bottom wall components 54 and 55, it is possible to share the divided body 52 and the divided body 53 with respect to the circuit breakers 21 having different numbers of poles, which leads to cost reduction. Of course, the same effects as those of the first embodiment and the like can be obtained.

(4) Fourth Embodiment Finally, a fourth embodiment of the present invention (corresponding to claims 1, 2 and 4) will be described with reference to FIGS. 11 and 12. After all, the same parts as those of the first embodiment are designated by the same reference numerals, detailed description thereof will be omitted, and only different points will be described below.

The mounting frame 61 according to this embodiment is also constructed by combining the left divided body 62 and the right divided body 63. The left divided body 62 has a left flange portion 33 at the upper end of the side wall portion 29 and a left bottom wall forming portion 64 extending rightward from the lower end of the side wall portion 29 in the figure. On the other hand, the right divided body 63 has the right flange portion 35 at the upper end of the side wall portion 30 and integrally has the right bottom wall forming portion 65 extending from the lower end of the side wall portion 30 to the left in the figure.

Further, the left bottom wall forming portion 64 has the receiving surface portion 6
An extending piece portion 64b having screw holes 64c formed in front of and behind 4a
Is configured. On the other hand, the right bottom wall component 65
In this case, is configured to have the receiving surface portion 65a and the like. The mounting frame 61 is configured by combining both bottom wall constituent parts 64 and 65 in a state of at least partly wrapping, and the width of the bottom wall part 28 can be changed by the wrap width.

In this embodiment, when the bottom wall portion 28 has a width corresponding to the four-pole circuit breaker 21 as shown in the drawing, the bottom surfaces of the receiving surfaces 64a and 65a are extended over the both surfaces. In this way, the reinforcing member 66 formed of a metal plate and having a size corresponding to the width dimension thereof can be attached. In addition, the reinforcing member 66 includes the right bottom wall forming portion 6
In the drawing corresponding to the receiving surface portion 65a of No. 5, extending piece portions 66b having screw holes 66a are integrally provided at both front and rear sides of the right half portion.

At this time, the circuit breaker 21 (insulating case 2
4) is 4 of the screw holes 64c, 64c and 66a, 66a.
It is designed to be screwed in place. According to this, it becomes possible to cope with a large-sized circuit breaker 21 which requires a sufficient mounting strength for the bottom wall portion 28. Further, by adjusting the wrap width of the bottom wall constituent parts 64 and 65, it becomes possible to share the divided body 62 and the divided body 63 with respect to the circuit breakers 21 having different numbers of poles, and thus the cost can be reduced. Of course, the same effects as those of the first embodiment and the like can be obtained.

In this case, the width of the bottom wall portion 28 is for two poles,
When it is used for three poles, sufficient mounting strength can be obtained without providing a reinforcing member. Of course, a reinforcing member corresponding to the case of 2 poles or 3 poles may be formed, and the reinforcing member may be attached even when the width of the bottom wall portion 28 is 2 poles or 3 poles.

In addition, the present invention is not limited to the above-described embodiments, but may be a combination of the embodiments, for example, the screw holes may be provided in a plurality of places and the reinforcing member may be provided. For example, the present invention can be appropriately modified and implemented within a range not departing from the gist.

[0049]

As is apparent from the above description, the present invention has the following excellent effects. That is, according to the mounting frame for a circuit breaker of claim 1, a bottom wall forming part which is at least a part of a bottom wall part for receiving the bottom surface of the circuit breaker and the circuit breaker is mounted, and a side surface of the circuit breaker One side wall portion located outside of the above, and since the whole is divided at the bottom wall portion, the two divided bodies are combined to constitute a circuit breaker of a different type. It is possible to share the above, and eventually the cost can be reduced.

At this time, if the bottom wall constituting portions of the two divided bodies are constructed so that at least a part thereof overlaps with each other, and the width dimension of the bottom wall portion can be adjusted by adjusting the overlapping width (Claims). (2) Circuit breaker mounting frame) By simply changing the overlapping width of the two divided bodies, it becomes possible to deal with various circuit breakers with different width dimensions, and the types of divided bodies can be further improved. It can be done less.

Further, in the case where the circuit breaker is attached to the screwed portion of the bottom wall by screwing, if the screwed portion of the bottom wall is formed in a plurality of places (the circuit of claim 3). By selectively using the mounting frame of the circuit breaker) and the screw fastening portion, it becomes possible to deal with various open circuit breakers having different screw fastening positions.

Furthermore, if a reinforcing member is attached to the bottom wall portion so as to extend over both bottom wall constituent portions (mounting frame of the circuit breaker according to claim 4), the bottom wall portion will be sufficient. It becomes possible to deal with large circuit breakers that require strength.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention and showing a state in which a mounting frame has a width corresponding to four poles.

[Figure 2] Front view of the mounting frame

FIG. 3 is a side view showing a mounted state of the circuit breaker.

FIG. 4 is a vertical sectional front view showing a mounted state of a circuit breaker.

FIG. 5 shows a state in which the mounting frame has a width corresponding to two poles (a)
And a plan view showing a state (b) in which the width is set for three poles

FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

7 is a vertical sectional side view taken along the line aa in FIG.

FIG. 8 is a view corresponding to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 10 is a view corresponding to FIG.

FIG. 11 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 12 is a vertical sectional front view taken along line bb of FIG.

FIG. 13 is a view corresponding to FIG. 3 showing a conventional example.

FIG. 14 is a view corresponding to FIG.

FIG. 15: For 2 poles (a), for 3 poles (b), for 4 poles (c)
Plan view showing the mounting frame

[Explanation of symbols]

In the drawings, 21 is a circuit breaker, 22, 41, 51 and 61 are mounting frames, 23 is a mounting plate (mounting base), 24 is an insulating case, 28 is a bottom wall part, 29 and 30 are side wall parts, 31, 32. ，
42, 43, 52, 53, 62, 63 are divided bodies, 33,
35 is a flange part, 34, 36, 44, 45, 54, 5
5, 64, 65 are bottom wall components, 34c, 36c, 44
c, 45c, 54c, 55c, 64c and 66b are screw holes (screw fixing portions), 38 is an engagement hole, 39 is an engagement protrusion, 66
Indicates a reinforcing member.

Claims (4)

[Claims] 1. A bottom wall part for mounting a circuit breaker on a mounting base, the bottom wall part receiving the bottom surface of the circuit breaker and mounting the circuit breaker, and the circuit rising from both sides of the bottom wall part. A pair of side wall parts that are located outside both side surfaces of the circuit breaker and that are attached to the mounting base body, wherein a bottom wall forming part that is at least a part of the bottom wall part and one side wall part are provided. A mounting frame for a circuit breaker, characterized in that it is constructed by combining two divided bodies in which the whole is divided at the bottom wall portion. 2. The bottom wall constituting portions of the two divided bodies are made to overlap each other at least in part, and the width dimension of the bottom wall portion can be adjusted by adjusting the overlapping width. The mounting frame for the circuit breaker according to claim 1. 3. The circuit breaker is adapted to be attached to a screwed portion of a bottom wall portion by screwing, and the screwed portion of the bottom wall portion is formed at a plurality of locations. The mounting frame for the circuit breaker according to claim 1 or 2. 4. The reinforcing member is attached to the bottom wall portion so as to extend over both bottom wall constituent portions.
A mounting frame for the circuit breaker according to any one of 1 to 3.