JP2834037B2 - Resin wiring box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin wiring box, and more particularly to a resin wiring box provided behind a wall.

[0002]

2. Description of the Related Art A conventional resin wiring box (hereinafter simply referred to as a box) generally has a rectangular bottom portion and side walls provided on four sides thereof. One side of the box is open, and a plate such as a wiring device mounting frame is attached to this opening. A screw insertion portion is provided on the inner surfaces of the pair of opposed side walls, and a male screw member for mounting the plate can be inserted therein. Further, a nut for screwing with the male screw member is embedded inside the screw insertion portion.

[0003]

In the above-mentioned box, the nut is inserted into the screw insertion portion from the hole formed in the bottom using an elongated jig, pushed into a predetermined position, and then ultrasonically welded. Embedded. However, in such a structure, since the outer periphery of the nut is simply welded to the inner periphery of the screw insertion portion, it is weak against the axial pressing force. Therefore, when the male screw member is screwed into the nut at the time of mounting the plate, the nut may be pushed by the male screw member and fall off, and the plate may not be fixed.

[0004] The problem to be solved by the present invention is to prevent the nut from falling off so that the plate can be securely attached. Another problem to be solved by the present invention is to facilitate mounting of a nut on a screw insertion portion. Still another problem to be solved by the present invention is to reduce the material and reduce the weight of the product.

[0005]

According to a first aspect of the present invention, there is provided a resin wiring box including a bottom portion, a side wall, an opening, a screw insertion portion, and a support portion. The side wall is erected from the bottom periphery. The opening is provided on the opposite side of the bottom, and the plate member can be attached. The screw insertion portion is provided so that a male screw member for attaching a plate member can be inserted and extends in the depth direction on the side wall, and a nut capable of screwing with the male screw member is provided inside. The support portion is provided in the screw insertion portion,
Supports the nut bearing surface. In this case, the bearing surface of the nut is supported by the support portion in the screw insertion portion, so that the nut does not fall off even if the nut is pushed by the male screw member.

[0006] In addition, Bei the nut insertion hole Eteiru. The nut insertion hole is provided in the side wall, and communicates with the support from the outer surface. Here, when mounting the nut in the screw insertion portion, the nut is inserted into the nut insertion hole from the outer surface and moved to the support portion. In this case, the arrangement of the nut becomes easy. Right
The insertion portion may be formed on the inner surface of the side wall.
In this case, there is no protrusion on the appearance of the box,
Easy to attach to etc.

[0007] The support portion below the root Ji insertion portion can be space to open outward and downward is formed. In this case, a part of the peripheral wall of the screw insertion portion is omitted, so that the material can be reduced and the weight of the product can be reduced. It can be formed convex portion which presses the nut bearing surface on the support surface of the inner wall and the support portion of nuts insertion hole. In this case, the bearing surface of the nut can be reliably supported with a simple structure.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wiring resin box (hereinafter simply referred to as a box) according to an embodiment of the present invention will be described below with reference to FIG. The box 1 has a bottom 5 to which a wiring device or the like is attached, a pair of long side walls 6 and 7 facing each other, and a pair of short side walls 8 and 9 facing each other. Each of these four side walls is erected from the periphery of the bottom 5. A plurality of elongated screw insertion holes 10 are formed on the long side walls 6 and 7 so as to face each other. In addition, the short side wall portions 8 and 9 have two holes for allowing electric wires to pass through.
One knockout 11 is formed.

At one end of the short side wall portions 8, 9, mounting portions 15, 16 parallel to the long side wall portion 6 are formed, a part of which is in contact with the long side wall portion 6. I have. The mounting portions 15 and 16 are provided with two holes 17 for mounting. Further, on the inner surface side of each of the short side wall portions 8, 9, cylindrical screw insertion portions 12, 13 for mounting a plate member such as a wiring device mounting frame are formed so as to protrude inward.

The screw insertion portions 12 and 13 have a support portion 19 formed in the middle thereof. As shown in FIG. 3, the support portion 19 includes a screw member 20 inserted into the screw insertion portion 12.
The nut 21 is formed to support the nut 21 that is screwed into the nut, and has a recess large enough to support the nut 21. Further, a space A is provided below the support portion 19.

As shown in FIGS. 1, 2 and 4, a nut insertion hole 22 is formed in the short side wall portions 8 and 9 from the outer surface side to the support portion 19 in the screw insertion portion 12. On the inner wall surface of the nut insertion hole 22 and the support surface of the support portion 19, a convex portion 23 that is in pressure contact with the nut seat surface is formed along the longitudinal direction of the nut insertion hole 22. With such a structure,
The nut 21 is pressed into the support portion 19 from the nut insertion hole 22 and is embedded in the screw insertion portion 12. At this time, the nut 21 is firmly held by the elastic deformation or the plastic deformation of the convex portion 23, so that it is possible to prevent the nut 21 from coming out.

When the box 1 thus obtained is to be attached to a structure, first, as shown in FIG. 5, the box 1 is first opened so that its long side wall portion is in contact with the side surface of the column 30, and the opening is opened. The portion is arranged so as to be flush with the surface of the column 30. Then, the mounting portions 15 and 16 are fixed to the column 30 with a screw member or the like. Thereafter, the wall material 32 is attached so as to cover the opening of the box 1. Then, a hole is made in the wall material 32, and a wiring device or the like is stored in the box 1, and then the plate 33 is attached. FIG. 6 shows a state in which the plate 33 is attached. When the plate 33 is attached, the screw member 20 is screwed to the nut 21. At the time of screwing, the nut 21 receives a force in the vertical direction in FIG. 6, but since it is strongly supported by the support portion 19,
The nut 21 does not fall off.

In the use form shown in FIG.
A rim 31 is provided between the support 30 and the support 30, but the rim 31 may not be provided in some cases. [Other Embodiments] In the embodiment shown in FIGS. 7 and 8, the box 1 has a space B that is open not only below the support portion 19 but also below and outside. In this case, the material can be reduced and the weight of the product can be reduced.

The other structure is the same as that of the above embodiment. Further, the design of the detailed structure of the box can be appropriately changed within a range that does not affect the gist of the present invention.

[0015]

In the resin wiring box according to the present invention,
The nut does not fall off due to being pushed by the male screw member. Therefore, the plate can be securely screwed to the box. When the side wall is further provided with a nut insertion hole communicating from the outer surface to the support portion, the arrangement of the nut is facilitated and the productivity is improved.

In the case where a space that opens outward and downward is formed below the support portion of the screw insertion portion, a part of the peripheral wall of the screw insertion portion can be omitted, so that the material can be reduced and the product can be reduced. The weight can be reduced. If a convex portion is formed on the inner wall surface of the nut insertion hole and the support surface of the support portion,
The nut can be reliably positioned and supported.

[Brief description of the drawings]

FIG. 1 is a perspective view of a resin wiring box according to an embodiment of the present invention.

FIG. 2 is a sectional view of the resin wiring box according to the embodiment shown in FIG. 1;

FIG. 3 is a sectional view of the resin wiring box according to the embodiment shown in FIG. 1;

FIG. 4 is an enlarged view of a nut insertion hole.

FIG. 5 is a sectional view showing a usage mode of the resin wiring box according to the present invention.

FIG. 6 is a sectional view when a plate member is attached to the resin wiring box according to the embodiment shown in FIG. 1;

FIG. 7 is a perspective view of a resin wiring box according to another embodiment of the present invention.

FIG. 8 is a sectional view of the resin wiring box according to the embodiment shown in FIG. 7;

[Brief description of reference numerals]

 1 Box 5 Bottom part 6,7 Long side wall part 8,9 Short side wall part 12,13 Screw insertion part 19 Support part 22 Nut insertion hole 23 Convex part

Claims (3)

(57) [Claims] 1. A bottom portion, a side wall erected from the periphery of the bottom portion, an opening provided on a side facing the bottom portion, to which a plate member can be attached, and a male screw member for attaching the plate member can be inserted. A screw insertion portion provided on the side wall so as to extend in the depth direction, and a nut capable of being screwed with the male screw member is provided therein; and a screw insertion portion provided in the screw insertion portion to support a seating surface of the nut. A support portion, and a nut provided on the side wall and communicating with the support portion from an outer surface.
A wiring box made of resin , which has a socket insertion hole . 2. The resin wiring box according to claim 1, wherein a space that opens outward and downward is formed below the support portion in the side wall and the screw insertion portion. Wherein the the inner wall surface and the supporting surface of the supporting portion of the nut insertion hole protrusion which presses the nut bearing surface is formed, a resin wiring box according to claim 1 or 2.