JP3131186B2 - Resin box for wiring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A box made of a resin for wiring (hereinafter simply referred to as a box) has an opening on one side, and is arranged such that this opening is located on the back side of a wall. The position of the box arranged behind the wall in this way is determined by attaching a metal member to the box and detecting the metal member from the front side of the wall with a metal detector. An example of the structure of a box that can be detected by a metal detector is disclosed in Japanese Utility Model Publication No. 59-26750. This box has a substantially rectangular opening, and a metal foil as a detection member is attached to a short side of the opening in a direction along the short side. In this case, the position of the short side of the box can be known by the reaction of the metal foil.

However, in such a structure, since the metal foil is only provided on the short side, the response to the metal detector is weak, and the outline of the box cannot be detected clearly. In addition, the conventional structure with metal foil attached
Although simple, the metal foil is apt to be torn or peeled during transportation, construction, etc., and the detection performance deteriorates, making it difficult to detect the arrangement position, and it takes time to repair the metal foil. Furthermore, for example, if the box is arranged behind the wall so that the short side is located up and down and the long side is located left and right, moving the metal detector up and down will make it easier to detect, but moving it left and right will help Hateful.

Another conventional example is disclosed in Japanese Utility Model Laid-Open Publication No. 51-65.
There is a box disclosed in Japanese Patent Publication No. 299. A metal frame having a substantially U-shaped cross section is fitted into the box along the periphery of the opening. According to this structure, there is no problem that the detection performance is degraded due to the detection member being torn or peeled off, and the metal frame is arranged along the periphery of the opening.
It is considered that the detection performance is improved as compared with the above-described conventional example.

[0005]

However, the latter structure has the following problems. The structure of the metal frame is relatively complicated, and there are many inconveniences such as troublesome manufacturing and mounting in a box, and an increase in manufacturing cost. If the dimensional accuracy of the peripheral edge of the box and the metal frame is incorrect, it will be difficult to attach the metal frame to the box,
In some cases, the fitting may not be possible.

[0006] Since a part of the metal frame is located on the inner surface side of the box, there is a high possibility that the metal frame comes into electrical contact with objects such as wiring equipment and electric wires housed in the box.
The same problem occurs in the former structure described above.) In addition, since the inner part of the metal frame protrudes into the box by the thickness of the inner part, this part may interfere with the housing of wiring equipment, electric wires, etc. in the box body, or damage the housing. There is a problem that the possibility of occurrence is high.

The problem to be solved by the present invention is to reliably detect the arrangement position of a wiring resin box with a simple structure. Another problem to be solved by the present invention is to improve productivity in addition to the above problems.
Still another object to be solved by the present invention is to prevent the detection member from coming into contact with a wiring device or the like stored in the box.

[0008]

SUMMARY OF THE INVENTION A wiring resin box according to the present invention is a wiring resin box disposed behind a wall of a building, and includes a box body and a metal tape. The box body has an opening, and can be disposed so that the opening faces the back surface of the wall. The metal tape is wound around the outer peripheral side surface of the opening in an annular shape and is adhered to the box main body, and is used for detecting an arrangement position of the box main body.

In this case, since the metal tape is annularly arranged on the outer peripheral side surface of the opening, the contour of the box can be clearly detected even if the metal detector is moved in any direction of up, down, left and right. Further, the structure is simple because the metal tape is merely wound around the outer peripheral side surface of the opening. An adhesive layer is provided on the surface of the metal tape that comes into contact with the box main body, and the operation for attaching the metal tape to the box main body is easy, so that the productivity is excellent.

[0010] Since the metal tape is provided on the end face of the opening so as not to overlap with the opening, the metal tape comes into electrical contact with objects such as wiring equipment and electric wires housed in the box. Can be avoided. Since the metal tape is provided on the outer peripheral side surface of the box main body, it is possible to prevent the metal tape from being in electrical contact with objects such as wiring devices and electric wires housed in the box,
The work of attaching the tape is easy.

The seam where the both ends of the metal tape overlap each other is electrically connected. As a method of electrically conducting, the tapes are adhered by the adhesive layer interposed therebetween, and a part of the tape superimposed is crushed so that the metal tapes are interposed through the adhesive layer. Without direct contact, thereby improving the electrical conductivity between the metallic tapes. Specifically, for example, it is preferable to break through a seam portion where both ends of the tape overlap with a needle.

Here, in the box according to the present invention, since the metal tape is annularly arranged on the outer peripheral side surface of the opening of the box body, it is easy to detect the contour of the opening, but to detect it more clearly. It is preferable that the metal tape is conductive in a ring shape. Therefore, the metal tape is conducted in a ring shape. In this case, a strong magnetic flux is generated, and the reaction to the metal detector becomes strong. For this reason, it is possible to more clearly detect the contour of the opening of the wiring resin box. Further, the range of the detectable depth (the distance from the wall to the box main body) also increases.

[0013]

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. This box has a rectangular box main body 1 having an opening on one side, and a metal tape 2 attached to the outer peripheral side surface of the box main body 1.

The box body 1 includes 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,
It has a pair of opposing short side walls 8 and 9. A plurality of elongated screw insertion holes 10 are formed on the long side walls 6 and 7 so as to face each other. This screw insertion hole 10 is
It is a hole through which a screw for attaching the box to a support or the like of the building is inserted. Further, two knockouts 11 for passing electric wires are formed in the short side wall portions 8 and 9. 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. A nut (not shown) is embedded in the screw insertion portions 12 and 13. The nut is embedded through a hole 14 formed from the outer side surface of the short side wall portions 8 and 9 toward the inner side.

The metal tape 2 is provided annularly at a position closest to the opening on the outer peripheral side surface of the box body 1. The metal tape 2 is an aluminum tape or the like.
(See FIG. 2). Further, the width is set so as not to cause inconvenience due to the screw insertion hole 10 or the knockout 11 on each side wall. The metal tape 2 is wound so that both ends overlap each other.
The seam portion 15 protrudes with a needle or the like from the surface of the tape superposed thereon, and electrically connects the upper and lower tapes as shown in an enlarged manner in FIG. That is, the upper and lower tapes 2 a and 2 b are joined at the joint portion 15 with the adhesive layer 16 interposed therebetween. Then, when a needle-like object having a sharp point is pierced from the outer surface of the tape 2a overlaid thereon, the tape 2a
Is crushed to form a sharply concave hole 24, and a portion protruding to the back side of the hole 24 penetrates the adhesive layer 16 and is depressed and deformed so as to pierce a part of the tape 2b stacked below. . Thereby, the tape 2a and the tape 2
and b directly contact each other without the interposition of the adhesive layer 16, thereby improving the electrical conductivity.

In the case of manufacturing such a box, a box body 1 manufactured by resin molding is prepared, and nuts are embedded in the screw insertion portions 12 and 13 in the box body 1 using the holes 14. . Next, the metal tape 2 is wound around the outer peripheral side surface of the box body 1. On this occasion,
The metal tape 2 is wound so that one end and the other end overlap. Further, the metal tape 2 is pushed with a needle or the like against the overlapping seam portion 15 as described above, so that the upper and lower tapes are electrically connected.

A case where the box thus obtained is attached to a building will be described with reference to FIG. In the use form shown in FIG.
1 is provided, but the body edge 21 may not be provided. When the body edge 21 is provided, the distance between the box body 1 and the wall material 22 is increased by the thickness of the body edge 21.

First, the box is arranged such that the long side wall portion is in contact with the side surface of the column 20 and the opening is flush with the surface of the column 20. Then, a screw is passed through the screw insertion hole 10 of the box, and the tip of this screw is
The box is fixed to the column 20 by screwing it to zero. Thereafter, the wall member 22 is attached so as to cover the opening of the box. Then, the metal tape 2 wound around the outer peripheral surface of the opening of the box from the surface of the wall material 22 is detected using a metal detector. By this detection, the outline of the box can be clearly and reliably known.

Next, a hole is formed in the wall member 22 along the opening based on the outline of the box obtained by the detection operation, and a plate member is attached from the wall member surface. The attachment of the plate member is performed by nuts embedded in the cylindrical screw insertion portions 12 and 13 provided in the box body 1 and screws screwed to the nuts. In such an embodiment, since the contour of the opening of the arranged box body can be clearly detected, when drilling a hole corresponding to the opening on the wall, a hole of an appropriate size is efficiently formed. You can open it. Further, the distance between the box body 1 and the surface of the wall member 22 is increased by the thickness of the body edge 21, but the metal tape 2 is electrically conducted, and the reaction to the metal detector becomes strong. So it can be detected well.

Further, the metal tape 2 is attached to the box body 1.
Since it does not cover the peripheral edge of the opening, no hindrance occurs when wiring equipment, electric wires, and the like are accommodated in the box body, and they do not come into contact with the metal tape to cause an electrical problem. [Modification] In the above embodiment, the nut is connected to the short side wall 8,
9 is buried through holes 14 formed inward from the outer surface, but the structure of the buried nut is not particularly limited to the above-described embodiment, and may be buried in the same manner as in the related art. .

The opening of the box body 1 is not limited to a rectangular shape but may be, for example, a square. The design of other details can be changed as appropriate without affecting the gist of the present invention.

[0022]

In the wiring resin box according to the present invention, the arrangement position can be reliably detected with a simple structure. Further, when an adhesive layer is provided on the surface of the metal tape that comes into contact with the box main body, the operation of attaching the metal tape to the box main body is easy, and the productivity is excellent.

Further, by providing a metal tape on the end face of the opening so as not to overlap with the opening, or by providing the metal tape on the outer peripheral side surface of the box main body, the metal tape and the contents accommodated in the box are electrically connected. Can be avoided. In addition, by electrically connecting the joint portions where both ends of the metal tape overlap each other, a strong magnetic flux can be generated, and the reaction to the metal detector can be enhanced.

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing a state in which the metal tape according to the present invention is conductive.

FIG. 3 is a cross-sectional view showing a usage form of the wiring resin box according to the present invention.

[Description of Signs] 1 Box body 2 Metal tape 5 Bottom part 6, 7 Long side wall part 8, 9 Short side wall part 12, 13 Screw insertion part 15 Joint part 16 Adhesive layer

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Sayanoi 1048 Kazuma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Works, Ltd. (56) References JP-A-7-15838 (JP, A) 108715 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02G 3/00

Claims (1)

(57) [Claims] 1. A box made of a resin for wiring disposed on the back of a wall of a building, comprising: a box main body having an opening, wherein the box can be disposed so that the opening faces the back of the wall. A metal tape for detecting the burying position of the box main body, which is wound in an annular shape on the outer peripheral side surface of the opening and adhered to the box main body, wherein the metal tape is provided on a contact surface with the box main body. A seam portion in which both ends of the metal tape overlap each other has an adhesive layer, and the tape is bonded with the adhesive layer interposed between the tapes, and crushes a part of the tape stacked thereon. And a resin box for wiring in which metal tapes are brought into direct contact with each other without an adhesive layer.