JPH0561850B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to boxes for electrical appliances such as switch boxes that are attached to walls, etc., and particularly relates to boxes for support frames that support electrical appliances. Regarding the mounting structure to the main body.

(Prior Art) Conventionally, electric appliances include a box body made of synthetic resin that is attached to a wall with body attachment screws, and a support frame that supports an electric appliance such as a switch from the front opening side of the box body that is attached with support frame attachment screws. Boxes for use are known. According to the standard, this type of box for electrical appliances generally has an insertion hole formed around the back of the box body into which the body mounting screw is inserted, and a side surface inside the box body. A screw hole into which a support frame mounting screw is screwed is provided at a position facing the insertion hole from the back side, but conventionally, this screw hole is located on the side surface of the box body and on the front opening side. The structure was such that it was provided on a protrusion that was integrally formed at the position.

(Problems to be Solved by the Invention) However, in this conventional structure, since the protrusion faces the through hole in the back side of the box body from the back side, it is difficult to integrally mold the box body.
There was a problem with molding. Furthermore, when screwing the box main body to a wall, the protrusion gets in the way, making the installation process troublesome.

The present invention is an attempt to solve the above-mentioned problems, and it is possible to easily mold the box body, etc., to easily attach the box body and the support frame, and to improve the strength. The purpose is to provide a problem-free box for electrical appliances.

[Structure of the invention]

(Means for Solving the Problems) The present invention provides a box main body that has an open front side and is attached to an attached part such as a wall using main body mounting screws;
The box main body is provided with a support frame that is attached to the box main body from the front opening side using support frame mounting screws and supports an electrical appliance such as a switch, and the support frame is provided at a position on the back side of the box main body and along the side surface inside the box main body. An insertion hole is formed into which the main body mounting screw is inserted, and a screw hole into which the support frame mounting screw is screwed is provided near the side surface of the box main body and at a position facing the insertion hole from the rear side. In order to achieve the above object, a box for electrical appliances is provided with a piece having a protruding amount smaller than the distance from the side surface to the insertion hole at a position on the side surface of the box body and on the front opening side. A mounting portion is integrally formed to protrude, and a support frame mounting piece is provided on the piece mounting portion to be fitted from the front opening side, and the support frame mounting piece is integrally formed with the support frame mounting piece. The box body is locked to the box body by engagement of the locking pawl with the piece mounting portion, and the box body has an integral protrusion portion that protrudes toward the center of the front opening of the box body. A screw hole into which the support frame mounting screw is screwed is provided in the portion.

(Function) In the box for electrical appliances of the present invention, when molding the box body from synthetic resin, for example,
The amount of protrusion of the piece mounting part formed on the side surface of the box body and at the position on the front opening side is smaller than the distance from the through hole in the back part of the box body to the side surface, so that the piece mounting part is lowered. You can prevent cuts from occurring. Also, when wiring,
Before attaching the support frame mounting piece to the box body, attach the box body to the wall or other surface to be mounted using the body mounting screws. At this time, the main body mounting screw is inserted into the insertion hole, but because of the above-mentioned protrusion amount of the bridge mounting portion, the bridge mounting portion does not get in the way. Next, the support frame attachment piece is fitted into the piece attachment part, but in this state, the locking claw of the support frame attachment piece is engaged with the piece attachment part, and the support frame attachment piece is firmly attached to the box body. It is locked. Furthermore, a support frame that supports an electrical appliance is attached to the box body using support frame mounting screws, and in this case, the support frame mounting screw is integrated with the support frame mounting piece and has a protrusion that protrudes toward the center of the front opening. It is screwed into the screw hole in the

(Example) Hereinafter, one example of the box for electrical appliances of the present invention will be described based on the drawings.

1 and 2, reference numeral 11 denotes a box body, which is integrally molded of, for example, synthetic resin, and has the shape of a rectangular parallelepiped box with an open front (top surface in the figures).

Cable passage holes 12 and 13 of the same shape are formed from the four side surfaces 11a and 11b of the box body 11 to the back surface 11c, respectively. Furthermore, fitting recesses 14 and 15 are formed in the side surface of the box body 11 so as to be continuous with each other above the cable passage holes 12 and 13 in the drawing. Furthermore, engaging convex portions 16 and 17 are integrally formed on the back surface of the box body 11 adjacent to both sides of each of the cable passage holes 12 and 13, respectively. Note that the cable passage holes 12, 1
The side portions 11a and 11b of No. 3 have the same inner dimensions as the molding 18, which is a protective cover through which a cable (not shown), which is an electric wire, is inserted.

Furthermore, in the center of the back surface 11c of the box body 11, knock-out portions 23 and 24 are integrally formed in two layers by broken line-shaped cut grooves 21 and 22. These knockout portions 23 and 24 are cut out as necessary.

Further, a plurality of elongated insertion holes 26 are formed in the back surface 11c of the box body 11 along the two opposing side surfaces 11a of the box body 11. As shown in FIG. 7, body mounting screws 28 for attaching the box body 11 to a wall 27 or other mounted portion are inserted through these insertion holes 26, and the cable passage holes 12 and It is located between the knockout portion 23 and the knockout portion 23. Protective protrusions 29 are integrally formed on the back surface of the box body 11, surrounding each of the insertion holes 26 from both sides. The height of these protective protrusions 29 is determined by the height of the main body mounting screw 28.
The height of the head 28a is slightly higher than that of the head 28a.

Furthermore, the opposing two parts in the box body 11
At the position on one side and along the front opening 11d,
A substantially U-shaped frame-shaped piece mounting portion 31 that extends in the vertical direction in the drawing is formed to protrude from each other. Furthermore, cutout portions 32 are formed at the center of the upper portion of each of these piece attachment portions 31 in the drawing. The piece mounting portion 31 is connected to the front opening 1 of the box body 11.
The entire projection from the direction perpendicular to 1d has a shape and size included in the portion of the cable passage holes 12 and 13 on the back surface 11c side. Therefore, the amount of protrusion of the piece mounting portion 31 is smaller than the distance from the side surface inside the box body 11 to the insertion hole 26.

Reference numeral 36 denotes a blockage piece integrally molded from, for example, synthetic resin, and this blockage piece 36 is removably fitted into the cable passage holes 12 and 13 of the box body 11 to close the cable passage holes 12 and 13. It is. As shown in detail in FIG.
A rectangular back fitting part 37 that closes the part on the back 11c side, and side surfaces 11a, 11 of the cable passage holes 12, 13 rising from the long sides of this back fitting part 37.
It consists of a trapezoidal side fitting part 38 that closes the part on the b side. Furthermore, a fitting piece 39 that is fitted into the fitting recesses 14 and 15 of the box main body 11 is integrally formed to protrude from a position on the rear fitting part 37 side of the upper surface of the side fitting part 38 in the figure. . Further, upwardly from both short sides of the back fitting portion 37, the engaging convex portions 16, 17 of the box body 11
A locking pawl 40 is integrally formed to protrude and be removably engaged with the respective locking claws.

Reference numeral 41 denotes a mating piece integrally molded from, for example, a synthetic resin. It is a blockage. Then, the matching piece 4
1 is the blockage piece 3, as shown in detail in FIG.
It has the same structure and shape as 6, and is composed of a back fitting part 42 and a side fitting part 43, as well as a fitting piece 44 and a locking pawl 45. However, the side fitting portion 43 has a substantially frame shape, and a small cable passage hole 46 is formed inside the side fitting portion 43.

Reference numeral 51 denotes a support frame mounting piece integrally molded from, for example, synthetic resin.
It is fitted from the d side, that is, from the upper side in the figure. The support frame attachment piece 51 includes a fitting part 52 that is fitted into the piece attachment part 31, and a fitting part 52 that protrudes from the upper part of the fitting part 52 toward the center of the front opening 11d. The protrusion 53 is fitted into the notch 32 from above in the figure.
Further, on both sides of the fitting part 52, locking claws 5 are provided which are engaged with the lower edges of both sides of the piece mounting part 31 as shown in the drawing.
4 are each formed integrally. A metal nut 56 having a screw hole 55 is embedded and fixed at the tip of the protrusion 53 facing the insertion hole 26 of the box body 11 from the back surface 11c side. Furthermore, an escape recess 57 is formed on the upper surface of the support frame mounting piece 51 as shown in the drawing, extending from the fitting part 52 to the protruding part 53, and a positioning protrusion 58 is formed on the side edge of the fitting part 52. .

Reference numeral 61 shown in FIG. 3 is a support frame formed by pressing a metal plate, for example, and this support frame 61 is attached to the box main body 11 from the front opening 11d side with support frame mounting screws (not shown). It supports the switch 62 as an electric appliance in a fixed manner. And the support frame 61
The screw holes 5 of the support frame mounting piece 51 are provided on both sides of the support frame mounting piece 51.
Elongated holes 63 are formed through which the support frame mounting screws to be screwed into the support frame mounting pieces 51 are inserted.
Screw holes 64 are respectively formed to face the relief recesses 57 . These screw holes 64 are connected to the support frame 6
A decorative board (not shown) covering the front opening 11d of the box main body 11, including 1, is screwed into the mounting screw.

Next, the operation of the above embodiment will be explained.

When the box body 11 is molded from a synthetic resin, for example, if the vertical direction in FIG. 2 is used as the mold opening/closing direction, the box body 11 will have a shape without undercuts and can be easily molded. In particular, the piece mounting portion 31 formed protruding from the side surface inside the box body 11 also does not form an undercut shape because the cable passage hole 12 is provided at the lower side in the figure. Moreover, since the bridge attachment part 31 is located at a position removed from the insertion hole 26 when viewed from above in the figure, it does not interfere with the formation of the insertion hole 26.

Moreover, each piece 36, 41, 51 has a shape without undercuts as shown in FIGS. 4 to 6, so that it can be easily molded.

When wiring, as shown in Figure 1, the cable passage holes 12 and 1 are
3 is closed by a closing piece 36. If there are branch lines, two or more cable passage holes 1
2 and 13 are opened. The cable through holes 12 and 13 through which the cables are inserted have side surfaces 11a and 1
If the cross-sectional area of the molding 18 is larger than the area of the part on the 1b side, the entire part is left open, but the molding 18
If the cross-sectional area is smaller, a mating piece 41 is fitted as shown by the chain line in FIG. In addition, when wiring is performed from the back side of the box body 11, all cable passage holes 12, 13
and the knock-out portion 23 on the inside or outside of the back surface 11c of the box body 11.
24 according to the diameter of the cable.

Then, as shown in FIG. 2, the box body 1
1, use a screwdriver to attach the box main body 11 to the mounting area, for example, the wall 27, using the plurality of main body mounting screws 28.
Attach by. At that time, these body mounting screws 2
8 are inserted into the insertion holes 26 of the back surface 11c of the box body 11 which is joined to the wall 27, but the piece attachment portion 31 located closer to the front opening 11c faces these insertion holes 26. Because I haven't
These bridge mounting portions 31 do not get in the way when tightening the main body mounting screws 28. In addition, when it is attached to the wall 27, the horizontal direction shown in FIGS. 1 and 2 becomes the vertical direction.

Also, for example, the molding 1 joined to the wall 27
8 is opposed to the open cable passage holes 12 and 13 and abutted against the outer surface of the box body 11, and the cable passed through the molding 18 is introduced into the box body 11.

Next, as shown in FIG.
1, respectively. In this state, the support frame mounting piece 51 has its fitting portion 52 fitted into the piece mounting portion 31, the protrusion 53 fitted into the notch 32 from above in the figure, and both locking claws 54 By engaging the lower edges of both sides of the piece mounting portions 31 as shown in the figure, the box body 11
It is firmly and securely locked against the

Further, a switch 62 is attached to the support frame 61, and the cable is connected to this switch 62. Next, turn the switch 62 on to the box body 11.
The support frame 61 is fixedly attached to the front opening 11d of the box main body 11 with a pair of support frame mounting screws. At this time, these support frame mounting screws are inserted into the respective elongated holes 63 of the support frame 61 and screwed into the screw holes 55 of the support frame mounting piece 51.

Further, a decorative board is fixedly attached to the support frame 61 using decorative board mounting screws, and the front opening 1 of the box body 11 including the support frame 61 is fixedly attached to the decorative board by using the decorative board.
Cover 1d. At this time, the decorative board mounting screws are screwed into the screw holes 64 of the support frame 61, but the support frame mounting pieces 5
By fitting the tip of the decorative board mounting screw into the relief recess 57 of No. 1, the support frame mounting piece 51 is prevented from being damaged by the load associated with its tightening.

Thus, according to the above configuration, the box body 11 can be easily attached to the wall 27, and the support frame attachment piece 51 can be attached to the box body 11.
And the support frame 61 can be attached easily and with sufficient strength.

In the above embodiment, only one support frame 61 is attached to the box body 11, but two or more support frames may be attached to the box body. In this case, a plurality of pairs of support frame attachment pieces will also be provided.

〔Effect of the invention〕

According to the present invention, the insertion hole through which the main body mounting screw is inserted is formed in the back side of the box main body,
In a box for an electrical appliance, a screw hole into which a support frame mounting screw of an electrical appliance is screwed is provided at a position facing the insertion hole from the rear side on the side surface of the box body. A bridge attachment portion is formed by protruding from this side surface to be smaller than the distance to the insertion hole, and a support frame attachment piece is provided that is fitted into this bridge attachment portion. It is locked to the box body by engaging with the piece mounting part, and has an integral protrusion, and this protrusion has a screw hole into which the support frame mounting screw is screwed, so that the box body For example, when molding with synthetic resin, undercuts can be avoided, making molding easier, and when the box body is attached to the part to be attached, the piece attachment part etc. can be prevented from getting in the way. It can be easily installed, and the support frame mounting pieces can be installed securely and easily.
Moreover, sufficient strength can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the box for electrical appliances of the present invention, Fig. 2 is a perspective view of the main body of the box, Fig. 3 is a perspective view of the support frame, and Fig. 4 is the attachment of the support frame. FIG. 5 is a perspective view of the closing piece, FIG. 6 is a perspective view of the mating piece, and FIG. 7 is a cross-sectional view of the insertion hole of the box body attached to the attached portion. DESCRIPTION OF SYMBOLS 11... Box main body, 11a, 11b... Its side part, 11c... Its back part, 11d... Front opening, 26... Insertion hole, 27... Wall which is an attached part, 28... Body mounting screw , 31... piece attachment part, 51... support frame attachment piece, 53... protrusion part, 5
4... Locking claw, 55... Screw hole of protrusion, 61...
...Support frame, 62...Switch as an electrical appliance.

Claims (1)

[Scope of Claims] 1. A box main body that is open at the front and is attached to a part to be attached using main body mounting screws, and a support frame that is attached to the box main body from the front opening side using support frame mounting screws and supports an electrical appliance. An insertion hole into which the main body mounting screw is inserted is formed at a position on the back side of the box main body and along a side surface inside the box main body, and an insertion hole into which the main body mounting screw is inserted is formed near the side surface inside the box main body and at a position along the side surface inside the box main body. In a box for an electrical appliance, in which a screw hole into which the support frame mounting screw is screwed is provided at a position facing from the back side, a screw hole into which the support frame mounting screw is screwed is provided from the side surface to a position on the front opening side of the box body. A bridge mounting portion is integrally formed to protrude with a protrusion amount smaller than the distance to the insertion hole, and a support frame mounting piece is provided on the bridge mounting portion to be fitted from the front opening side, and the support frame mounting piece is , a locking pawl integrally formed on the support frame mounting piece engages with the piece mounting portion to be locked to the box body, and protrudes toward the center of the front opening of the box body. 1. A box for an electrical appliance, characterized in that it has an integral protrusion, and the protrusion is provided with a screw hole into which the support frame mounting screw is screwed.