JP5270479B2 - Mounting device for electrical equipment and circuit breaker provided with the mounting device - Google Patents

Abstract

The invention provides a mounting means for electric device and circuit breaker therewith, which is capable of prolonging the effective length of an elastomer and saving space. In the electric device, a screw mounting hole for fixing the electric device to a fixing component is disposed on top of the guiding groove of a retainer. The retainer comprises a frame part with a hollow part, a fastening part disposed at the side end of the guide rail on the frame, an elastomer which is integrated with the fastening part and contained in the hollow part and is provided with a snaking feet part, a fastening boss disposed at the free end of the snaking feet part, and a through part which is used for mounting a screw and is disposed in the space between the snaking feet parts. The retainer is disposed in the guiding groove. The fastening boss disposed at the free end of the snaking feet part is fastened in the fastening hole disposed on the inner wall of the guiding groove. The mounting screw is inserted into the mounting hole disposed on top of the guiding groove, thereby the mounting screw reaches to the fixing component through the through part and the electric device is disposed on the fixing component.

Description

  The present invention relates to an electric device mounting apparatus that can mount an electric device on a rail and can be screwed to a fixing member, and a circuit breaker including the mounting device.

2. Description of the Related Art Conventionally, as a mounting device for an electrical device, a recess is formed on the top surface side where the electrical device is mounted and the rail is sandwiched on the bottom surface side. The electric device is held on the rail by engaging with the screw, and the screw hole is provided on the bottom surface portion, the bottom surface side is brought into contact with the fixing member, and the electric device is attached to the fixing member with the mounting screw. (For example, refer to Patent Document 1 and FIG. 2).
Further, in a structure to be held by a rail, there is a structure in which an elastic member that presses and urges an engaging portion on a rail is formed in a meandering elastic body (for example, see Patent Document 2 and FIG. 2).

Japanese Utility Model Publication No. 01-176984 (Fig. 2) Utility Model Registration No. 2532856 (Fig. 2)

The conventional electrical device mounting apparatus is configured as described above, and an elastic member for holding the electrical device on the rail, and a mounting screw hole for fixing the electrical device to the fixing member with a mounting screw, There is a problem in that they are respectively disposed at positions apart from the bottom surface portion, and space for the bottom surface portion is required, so that the attachment device itself becomes large.
In addition, the elastic member requires a required amount of deflection in order to generate the required mounting force, but the effective length is limited, and in order to generate the required mounting force, the lateral width of the mounting device is widened. In addition to increasing the overall length, it is necessary to secure a necessary space around the mounting screw hole.

  The present invention has been made to solve the above-described problems, and is capable of generating a necessary mounting force while securing a necessary amount of deflection of an elastic body and screwing an electric device to a fixing member. An object of the present invention is to obtain a mounting device for an electric device and a circuit breaker provided with the mounting device by saving a space by arranging screw holes for mounting in an up-and-down direction with the elastic body. .

  In the mounting device for an electrical device according to the present invention, a recess for inserting the rail is formed on the bottom surface, an engagement groove is formed on one side of the recess, and on the other side of the recess facing the engagement groove. Engaging the engaging groove with an edge on one side of the rail having an U-shaped cross-sectional shape and an edge projecting outward at both upper ends of the electric device including a holder mounted in the guide groove In the mounting device for an electric device that can be attached to the rail by elastically engaging the holding device with the other edge of the rail, the electric device includes the guide groove of the holding device. An attachment hole for an attachment screw for fixing the electric device to the fixing member is formed above, and the holder has a frame portion having a hollow portion, and an engagement formed at an end of the frame portion on the rail side. The joint portion and the engagement portion are formed integrally and continuously, and are accommodated in the hollow portion. An elastic body having a leg, an engagement protrusion formed at a free end of the elastic body meandering leg, and a mounting screw penetration formed in a space between the elastic body meandering leg, The holder is attached to the guide groove, and an engagement protrusion of a free end of the elastic meandering foot is locked to an engagement hole formed in an inner wall of the guide groove, and the electric device is connected to the guide groove. The mounting screw is inserted into the mounting hole formed above, so that the mounting screw can pass through the space between the meandering legs of the elastic body and reach the fixing member to be attached to the fixing member. It is a thing.

  According to the electrical device mounting apparatus of the present invention, the electrical device has an attachment hole for a mounting screw for fixing the electrical device to the fixing member above the guide groove of the retainer, and the retainer has a hollow portion. A frame portion having an engagement portion formed at an end of the frame portion on the rail side, an elastic body formed integrally with the engagement portion and housed in a hollow portion and having a meandering foot, An engaging projection formed at the free end of the meandering foot and a mounting screw penetrating portion formed in a space between the meandering feet of the elastic body, and the holder is mounted in the guide groove to meander the elastic body The engaging protrusion on the free end of the foot is locked in the engaging hole formed on the inner wall of the guide groove, and the electric device inserts the mounting screw into the mounting hole formed above the guide groove, and the mounting screw is the elastic body. Since the fixing member can be attached to the fixing member by passing through the space between the meandering feet, the holder and the attachment hole Are disposed to overlap in the vertical direction of the electrical equipment, it is possible to increase the effective length of the elastic body, the necessary amount of deflection of the elastic member, it is possible to obtain the holding force, it is possible to save space.

It is a side view which shows the time of the rail attachment of the attachment apparatus of the electric equipment in Embodiment 1 of this invention. It is a principal part expansion perspective view which looked at FIG. 1 from the arrow A direction (lower surface). It is an expansion perspective view of the holder of FIG. FIG. 4 is a plan view of FIG. 3. It is the BB sectional view taken on the line of FIG. It is a bottom view of FIG. It is a side view which shows the time of the attachment to the fixing member of the attachment apparatus of the electric equipment in Embodiment 1 of this invention. FIG. 10 is a plan view showing another example of a holder in the second embodiment. When the holder of Embodiment 2 is mounted and the electric device is attached to a rail, the electric device is viewed from the bottom side.

Embodiment 1 FIG.
FIG. 1 is a side view showing the rail mounting of the electrical device mounting apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged perspective view of a main part when FIG. 1 is viewed from the direction of arrow A (lower surface). 3 is an enlarged perspective view of the holder of FIG. FIG. 4 is a plan view of FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a bottom view of FIG.

  1 and 2, for example, in the electric device 1 that is a circuit breaker, a recess 1a into which a rail 2 laid on a distribution board or a distribution board is fitted is formed in the bottom surface part 1b. The bottom surface portion 1b may be formed integrally with the electric device 1, or may be formed separately and fixed to the electric device 1. The rail 2 has a U-shaped cross section, and plate-like edges 2a and 2b projecting outward are formed at both upper ends thereof. An engagement groove 1c that engages with a plate-like edge 2a on one side of the rail 2 is formed on one side of the recess 1a, and a step is formed on the other side of the recess 1a that faces the engagement groove 1c. A holder 3 that is mounted in the guide groove 1d and engages with the plate-like edge 2b of the rail 2 is disposed.

  The electric device 1 is configured such that the engaging groove 1c is engaged with the plate-like edge 2a on one side of the rail 2, and the holder 3 is elastically engaged with the plate-like edge 2b on the other side of the rail 2. The rail 2 is attached and held. As shown in FIG. 2, the holder 3 is mounted in a stepped guide groove 1 d formed on the bottom surface portion 1 b so as to be orthogonal to the rail 2. The stepped guide groove 1d is a groove having a narrow lower width and a wide upper width that opens to the bottom surface, and is formed so as to penetrate from the rail 2 side to the side surface of the electric device 1 opposite to the rail 2 side.

  3 to 5, the holder 3 has a plate-like frame portion 3a with an inclination having a hollow portion 3a1. The frame portion 3a has an engaging portion 3b that engages with the rail 2 at the tip thereof. The engaging portion 3b is formed with an inclined portion 3b1 and a retaining protrusion 3b2. A hooking hole 3g is formed at the rear end of the frame 3a. In the hollow portion 3a1 of the frame portion 3a, an elastic body 3c having a meandering foot 3c3 for holding the electric device 1 by elastically engaging the engaging portion 3b with the plate-like edge portion 2b of the rail 2 is housed. . The elastic body 3c has a meandering foot 3c3 whose one end is continuous with the engaging portion 3b. The meandering foot 3c3 is connected in series with the inverted U-shaped portion 3c1 and the U-shaped portion 3c2 in a meandering manner. Forming. The other end of the meandering foot 3c3 of the elastic body 3c is a free end 3e, and has an inclined portion 3e1 and an engaging protrusion 3d for increasing the strength. As shown in FIG. 1, the engagement protrusion 3 d engages with an engagement hole formed above the stepped guide groove 1 d near the side surface of the electric device 1.

  When the holder 3 is mounted in the stepped guide groove 1d, the bottom surface of the electrical device 1 and the bottom surface of the elastic body 3c are substantially flush with each other as shown in FIG. The side surface of the rear end portion of the holder 3 (the other end of the inclined portion 3b1) is substantially flush. As for the holder 3, the whole frame part 3a, the engaging part 3b, the elastic body 3c, etc. are integrally formed with thermoplastic resins, such as PBT (polybutylene terephthalate), for example. A through portion 3f formed in a space between the inverted U-shaped portion 3c1 and the U-shaped portion 3c2 of the meandering foot 3c3 of the elastic body 3c has a dimension that allows a mounting screw 4 (see FIG. 7) described later to be inserted.

  FIG. 6 is a bottom view of FIG. FIG. 6 shows that the electric device 1 is mounted on the bottom surface when the holding device 3 is mounted in the stepped guide groove 1 d and the holding device 3 is engaged with the plate-like edge 2 b of the rail 2 to hold the electric device 1. It is the figure seen from the side. An attachment hole 1f for the attachment screw 4 is formed in the electrical device 1 above the through portion 3f formed between the meandering legs 3c3 of the elastic body 3c. Three attachment holes 1 f are formed in the electrical device 1. The electric device 1 can be fixed to the fixing member 5 by inserting the mounting screw 4 into these.

  In the electrical apparatus mounting apparatus configured as described above, the holder 3 is mounted in the stepped guide groove 1d in a state where the rail 2 is not inserted into the recess 1a of the electrical apparatus 1. The rear end of the holder 3 is inserted into the stepped guide groove 1d from the bottom of the recess 1a. At this time, the frame 3a of the holder 3 is inserted into the groove side where the stepped guide groove 1d is wide, and the elastic body 3c is inserted into the groove side where the stepped guide groove 1d is narrow. When the frame portion 3a is inserted into a groove having a wide stepped guide groove 1d, the holder 3 is guided by the stepped portion of the stepped guide groove 1d so that the holder 3 does not fall from the stepped guide groove 1d. 3 can be easily slid. When the holder 3 is slid, the tip of the engaging projection 3d provided at the free end 3e of the elastic body 3c is in contact with the upper surface of the stepped guide groove 1d (the bottom surface of the electric device 1). The free end 3e of 3c is bent downward (below the electric device 1).

  When the holder 3 is further slid so as to be pushed into the stepped guide groove 1d, the engagement protrusion 3d of the free end 3e of the elastic body 3c is located above the stepped guide groove 1d near the side surface of the electric device 1. The position of the formed engagement hole is reached. At this time, since the free end 3e of the elastic body 3c is bent downward, the engagement protrusion 3d of the free end 3e is fitted into the engagement hole, and the free end 3e of the elastic body 3c is bent. Return to the state. Thereby, the movement of the free end 3e of the elastic body 3c is locked, and the mounting of the holder 3 to the stepped guide groove 1d is completed.

  As shown in FIGS. 1 to 6, the attachment of the electric device 1 to which the retainer 3 is attached to the rail 2, the engaging groove 1 c on one side of the recess 1 a of the electric device 1 is formed on the rail 2. After engaging the plate-like edge portion 2a on one side, the electric device 1 is rotated around the engagement portion, and the inclined portion 3b1 of the holder 3 is attached to the plate-like edge portion 2b on the other side of the rail 2. Abut (see FIG. 5). When the electric device 1 is further rotated and pushed in this state, the inclined portion 3b1 slides on the end surface of the plate-like edge portion 2b, and the engaging portion 3b of the holder 3 resists the elastic force of the elastic body 3c in the right side of FIG. Slide in the direction. At this time, the elastic body 3c is compressed because its free end 3e is locked. When the inclined portion 3b1 gets over the plate-like edge 2b of the rail 2 by further pushing the electric device 1, the elastic body 3c that has been compressed so far is restored, and the holder 3 slides to the left and returns to the original position. Return. As a result, the engaging portion 3 b engages with the plate-like edge 2 b of the rail 2. This engaged state is stably held by the compression biasing force of the elastic body 3c.

  6 and 7, the electric device 1 is fixed to the fixing member 5 of the switchboard, for example, by fitting a mounting screw 4 (see FIG. 7) into a mounting hole 1 f formed in the electric device 1. At this time, when the mounting screw 4 is fitted into the mounting hole 1f, the mounting screw 4 passes through the through portion 3f between the meandering legs 3c3 of the elastic body 3c, so that the holder 3 is attached to the electric device 1. However, the electric device 1 can be fixed to the fixing member 5 with the mounting screw 4. Thus, since the holder 3 and the attachment hole 1f are arranged so as to overlap in the vertical direction of the electrical device 1, in other words, the elastic body 3c is formed so as to avoid the attachment screw 4, thereby the elastic body 3c. The effective length of the elastic member 3c can be increased without increasing the lateral width of the holder 3, and the necessary amount of deflection and holding force as the elastic body 3c can be obtained, thereby achieving space saving. .

  In FIG. 7, it is a side view which shows the time of the attachment to the fixing member of the attachment apparatus of the electric equipment in Embodiment 1. FIG. In FIG. 7, the electric device 1 is fixed to the fixing member with the mounting screw 4 in a state where the holder is mounted. As described above, since the mounting screw 4 penetrates the through portion 3f between the meandering legs 3c3 of the elastic body 3c, the electrical device 1 is attached to the fixing member 5 even when the holder 3 is mounted on the electrical device 1. 4 can be fixed. In the case of FIG. 7, the electric device 1 can be fixed to the fixing member 5 with the mounting screw 4 even if the rail is not inserted.

  Next, when the electric device 1 is engaged with and attached to the rail 2 using the holder 3, the electric device 1 is removed from the rail 2 in FIGS. At the opening of the stepped guide groove 1 d on the side surface of 1, for example, a flathead screwdriver is inserted into the catching hole 3 g (FIG. 5) of the holder 3 through the gap with the holder 3. It pulls against the compressive force of the elastic body 3c on the side surface side. Then, the engagement between the engagement portion 3b of the holder 3 and the plate-like edge portion 2b of the rail 2 is released. In this state, the electric device 1 is lifted to rotate around the engaging portion of the plate-like edge 2a of the rail 2 and the engaging groove 1c of the recess 1a, and then the plate-like edge 2a of the rail 2 and the recess 1a The electrical device 1 can be removed from the rail 2 by removing the engaging portion of the engaging groove 1c.

  In order to prevent the retainer 3 from being pulled excessively toward the side surface of the electric device 1, a retaining protrusion 3b2 is formed on the engaging portion 3b, and the retaining protrusion 3b2 is formed into the rail 2 of the stepped guide groove 1d by an appropriate drawer. The retainer 3 is prevented from being pulled out more than necessary by engaging with an engagement hole formed above the side inclined portion 3b1. Once the holder 3 is attached to the electric device 1, it is not necessary to remove it. However, if it is removed, the free end 3e of the elastic body 3c is pulled downward with pliers or the like from the bottom surface side of the electric device 1. If the mating protrusion 3d is extracted from the engagement hole, and the holder 3 is slid in the left direction (recessed direction) of the stepped guide groove 1d in this state, the holder 3 can be removed.

Embodiment 2. FIG.
FIG. 8 is a plan view showing another example of the holder in the second embodiment. FIG. 9 is a view of the electric device 1 as viewed from the bottom side when the holder 3 of the second embodiment is mounted and the electric device 1 is attached to the rail 2. In the first embodiment, the mounting screw 4 passes through the through portion 3f in the vicinity of the free end 3e of the elastic body 3c. However, the holder 3 is shaped as shown in FIG. You may make it penetrate the penetration part 3f distant from the free end 3e. Moreover, all the penetration parts 3f of the elastic body 3c may have the same shape so that the attachment screw 4 can penetrate any of the penetration parts 3f.

  As described above, the holder 3 and the attachment hole 1f are arranged so as to overlap in the vertical direction of the electric device 1, in other words, the elastic body 3c of the holder 3 is formed so as to avoid the attachment screw 4. The effective length of the elastic body 3c can be lengthened, and the required deflection amount and holding force as the elastic body 3c can be obtained without increasing the lateral width of the holder 3. Thus, the space can be saved.

DESCRIPTION OF SYMBOLS 1 Electric equipment 1a Recessed part 1b Bottom face part 1c Engagement groove 1d Stepped guide groove 1f Mounting hole 2 Rail 2a, 2b Plate-like edge part 3 Holder 3a Frame part 3a1 Hollow part 3b Engagement part 3b1 Inclination part 3b2 Stop protrusion 3c Elasticity Body 3c1 Reverse U-shaped part 3c2 U-shaped part 3c3 Meandering foot 3d Engaging protrusion 3e Free end 3e1 Inclined part 3f Through part 3g Hooking hole 4 Mounting screw 5 Fixing member.

Claims (3)

A recess having a rail inserted into the bottom portion is formed, an engagement groove is formed on one side of the recess, and a holder is mounted on the guide groove on the other side of the recess facing the engagement groove. Equipment
The engagement groove is engaged with an edge of one side of the rail having a U-shaped cross-section and edges extending outward at both upper ends thereof, and the holding tool is mounted on the other edge of the rail. By elastically engaging the
In the mounting device for electrical equipment that can be mounted on the rail,
In the electrical device, an attachment hole for a mounting screw for fixing the electrical device to a fixing member is formed above the guide groove of the holder,
The holder has a frame portion having a hollow portion, an engagement portion formed at an end portion of the frame portion on the rail side, and is formed integrally and continuously with the engagement portion and is stored in the hollow portion. An elastic body having meandering legs, an engagement protrusion formed at a free end of the meandering leg of the elastic body, and a through-hole for the mounting screw formed in a space between the meandering legs of the elastic body. ,
The holder is attached to the guide groove, and the engagement protrusion of the free end of the meandering leg of the elastic body is locked to the engagement hole formed in the inner wall of the guide groove,
The electric device inserts the mounting screw into the mounting hole formed above the guide groove, and the mounting screw reaches the fixing member through a through portion of a space between the meandering legs of the elastic body and fixes the electric device. An apparatus for attaching an electric device that can be attached to a member. The electric device attachment device according to claim 1, wherein the meandering legs of the elastic body are formed in a meandering shape by alternately connecting inverted U-shaped portions and U-shaped portions in series.   The circuit breaker provided with the attachment apparatus of the electric equipment of Claim 1 or Claim 2.

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