JPH0833160A - Box for burying in concrete - Google Patents

Abstract

PURPOSE:To surely prevent the penetration of concrete limewash without needing the troublesome hole stop work by a gum tape or the like through this is one which can easily and quickly perform the assembling work between a box body to be carried separately into the field of work execution and a depth-of-coating cover body with small trouble. CONSTITUTION:Mounting hole 14 for fixation of a cover, where round holes which allow the passage of the heads 11a of screws 11 and slots which allow the passage of only the shanks 11b of the screws are made each in one, are made, in opposition to the female screw holes 12 made at plural places around the mouth 2a of a box 2, at the even board 3 of a depth-of-coating cover body 6. Furthermore, around this mounting hole 14 for fixation of a cover is a tubular projection 15 as high as an outward circularly projecting peripheral wall 4 forming an opening 5 provided at the depth-of-coating cover body 6 for leading out wiring, etc., made integrally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outlet for relaying switches or wiring / pipes, and for extracting electricity from various wirings / pipes to various power consuming equipment, such as a switch box and an outlet box. The present invention relates to a concrete burying box that is used by burying and fixing it in a concrete structure such as a concrete wall or floor while housing electric appliances such as.

[0002]

2. Description of the Related Art A concrete burying box of this type has a box body made of synthetic resin having a punching piece capable of forming a drawing hole for wiring, piping, etc. by punching in a peripheral wall opening in one direction. A synthetic resin that has a flat plate portion that closes the opening of the box body, and an opening for drawing out wiring, piping, etc. is formed at the center of the flat plate portion with an annular projecting peripheral wall portion that projects outward. Made of a synthetic resin cover body and a synthetic resin lid member integrally formed on the inner peripheral edge of the annular projecting peripheral wall portion so as to close the opening of the coated coating cover body, and concrete casting is performed. Previously, the inner surface of one of the pair of molds arranged to face each other is fixed so that the synthetic resin lid member is pressed, and in this state concrete is poured, the concrete is Hard The box is buried in the concrete structure by demolding the pair of mold after. After that, the synthetic resin lid member is punched out from the coating cover body to open the opening, and various electrical appliances such as switches and outlets are stored in the box body through this opening, and predetermined wiring and piping work is done. After that, a lid for closing the opening is attached to the cover body for use.

By the way, in the concrete burying box having the above-mentioned structure, the opening shape of the paint cover cover body is made corresponding to the type of various electric appliances such as switches and outlets housed in the box body. While there are multiple types of different types, the box body is usually made to correspond to such multiple types of paint replacement cover bodies with one type of common specifications. In most cases, it is delivered to the construction site separately from a separate supplier from the coating cover body. Then, at the construction site, in the internal wall surface of the peripheral wall portion of the box body side, to the female screw holes formed at a plurality of locations around the opening, cover fixing provided at a plurality of locations of the coating allowance cover body facing the female screw holes. Assembling work has been performed such that the coating cover body is fixed to the box body by screwing a screw inserted through the use screw insertion hole.

[0004]

In the conventional concrete burying box having the above-mentioned structure, when the box body is carried into the construction site, the screw which is a small component is not lost so that the box body is not lost. Is loosely screwed into the female screw hole and is carried in. Therefore, when assembling the box body and the coating allowance cover body that are separately carried into the construction site as described above, the screw is once removed from the female screw hole, and the removed screw is inserted into the insertion hole of the paint allowance cover body. The coating cover body is fixed to the box body by inserting it from the outer surface side of the coating body cover body and screwing it into the female screw hole of the box body again and tightening it firmly, so that it is very troublesome and troublesome. However, there was a problem that the workability in the field was poor.

In order to eliminate the complexity of the work of assembling the box body and the coating allowance cover body at such a construction site, a circular hole for allowing the screw head to pass is provided on the coating allowance cover body side. A cover fixing mounting hole is formed that is connected to a long hole that blocks passage of the screw head and allows passage of only the screw shaft of the screw, and is loosely screwed into the female screw hole of the box body. Pass the mounting hole on the paint cover cover side to the head of the existing screw at the position of the circular hole, and displace the paint cover body so that the screw shaft of the screw moves to the long hole side. It is conceivable that the coating cover body is fixed to the box body by tightly tightening the screws in this state.

When the cover fixing mounting hole having the above-described shape is formed on the coating margin cover main body side, it is not necessary to temporarily remove the screw loosely screwed into the female screw hole of the box main body. Although the assembly work with the cover cover main body can be performed easily and quickly with less effort, most of the cover fixing mounting holes remain open on the flat plate part of the coating cover cover body after assembly, so that the concrete is left as it is. However, there is an inconvenience that concrete slag penetrates into the box body through the mounting hole. In addition, in order to prevent the entry of concrete slag from the mounting hole, it may be possible to attach gum tape, etc. to the mounting hole to close it, but this would require time to close the hole, so remove the screw once. In comparison with the case of re-screwing, the workability cannot be expected to be improved so much, and there is a problem that the wiring and the piping are likely to be damaged by the intrusion of the concrete slag depending on the hole closing state.

The present invention has been made in view of the above situation, and can improve the workability of assembling the box body and the coating cover body, which are separately carried in, at the construction site. However, it is an object of the present invention to provide a concrete burying box that can reliably prevent the entry of concrete slag.

[0008]

In order to achieve the above object, in the concrete burying box according to the present invention, a hole for drawing out wiring, piping, etc. can be formed by punching in a peripheral wall portion opening in one direction. Box body having a punching piece and forming female screw holes into which screw for fixing a cover can be screwed at a plurality of positions around the opening on the inner wall surface of the peripheral wall portion, and the opening of the box body. An opening for drawing out wiring, piping, etc. is formed by an annular projecting peripheral wall part projecting outward in the central part of the flat plate part that closes the part, and the box body is formed by the flat plate part on the outer periphery of the annular projecting peripheral wall part. A circular hole that allows passage of the head of the screw and a long hole that blocks passage of the screw head and only allows passage of the screw shaft portion of the screw are formed in communication at a plurality of locations facing the female screw hole on the side. And a synthetic resin coating allowance cover body having mounting holes for fixing the cover, and a synthetic material integrally formed on the inner peripheral wall of the annular protruding peripheral wall portion so as to be punchable so as to close the opening of the coating allowance cover body. A resin lid member is provided, and a cylindrical protruding portion having the same protruding height as the annular protruding peripheral wall portion is formed around the plurality of cover fixing mounting holes.

In the concrete burying box having the above structure, the box body and the coating cover body are rectangular, and the female screw hole on the box body side, the cover mounting hole on the coating cover body side, and the cylindrical protruding portion around it are provided. It is preferable to provide at least one diagonal corner.

[0010]

According to the present invention, when the box body and the coating cover body separately carried into the construction site are assembled at the construction site, female screw holes are formed at a plurality of locations around the opening of the box body. Without loosening the screw that is brought into the site together with the box body by loosely screwing it in advance, leave the screw hole loosely screwed into the female screw hole, and attach the mounting hole on the coating cover body side to the head of the screw. While passing it at the position of the circular hole, displace the coating allowance cover body so that the screw shaft part of the screw moves into the long hole side, and tighten the screw strongly in this state to make the coating allowance cover body move to the box body. It can be fixed with a small number of steps. After the two are assembled and fixed, the inner edge of one of the opposing pair of molds has an annular projecting peripheral wall of the coating allowance cover body and an edge of a cylindrical projecting part formed around the mounting hole. After fixing the whole box in a state in which the parts are pressed, concrete structures such as concrete walls are formed by placing concrete between a pair of molds, but at this time, the center of the coating allowance cover main body is formed. The part opening is closed by the annular projecting peripheral wall and the lid member, and the mounting hole is closed by the cylindrical projecting part, so that it can be inserted into the box body of the concrete slag without blocking the hole with gum tape. Can be prevented.

In particular, when the box body and the coating allowance cover body are rectangular, at least one of the female screw hole on the box body side, the cover attaching hole on the coating allowance cover body side, and the cylindrical protruding portion around it is provided in at least one diagonal direction. With the configuration provided at both corners, the entire box can be pressed and fixed against the inner surface of the form without rattling, and the entry of concrete slag can be prevented more reliably.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a concrete burying box according to an embodiment of the present invention, FIG. 2 is a front view of an assembled state, and FIG. 3 is a side view with a half section thereof. This concrete burying box is roughly classified. A box body 2 integrally formed in a rectangular shape with a synthetic resin such as hard vinyl chloride and having a peripheral wall portion 1 that opens in one direction, and a flat plate portion 3 that closes an opening 2a of the box body 2. A ring-shaped projecting peripheral wall portion 4 having a substantially oval shape in plan view and projecting outward in the center
With a coating cover cover body 6 integrally formed in a rectangular shape with synthetic resin such as hard vinyl chloride so as to form an opening 5 for drawing out wiring and piping, and the opening 5 of the coating cover cover body 6. The cover member 8 is integrally formed with the synthetic resin such as the hard vinyl chloride so as to be capable of being punched from the inner peripheral edge portion of the annular protruding peripheral wall portion 4 through the thin portion 7 so as to be closed.

The peripheral wall portion 1 of the box body 2 is formed with a plurality of circular punching pieces 9 capable of forming holes for drawing out wiring, piping, etc. by punching, and the inner periphery of the peripheral wall portion 1 is formed. Near the two diagonal corners of the box body 2 along the wall surface, there is a substantially cylindrical portion 1 respectively.
0 and 10 are integrally formed, and these substantially cylindrical portions 1
0 and 10 are female screw holes 12 through which the cover fixing screws 11 and 11 can be screwed so as to face the opening 2a of the box body 2.
Screw fittings 13, 13 having 12 are inserted.

On the other hand, two diagonal directions of the flat plate portion 3 on the outer periphery of the substantially oval annular projecting peripheral wall portion 4 of the coating allowance cover body 6 facing the female screw holes 12, 12 on the box body 2 side. The above-mentioned screw 1 near each corner
The circular holes 14a, 14a having a size (diameter) allowing the passage of the heads 11a, 11a of the screws 11, 11 and the screw shaft portion 11b of the screws 11, 11 for preventing the passage of the heads 11a, 11a of the screws 11, 11. , 11b having a width allowing only passage of 11b
b and 14b are cover-fixing mounting holes 14 and 1 formed to communicate with each other in an arc shape with the center point of the coating material cover body 6 as a radius.
4 is formed, and cylindrical protrusions 15, 15 having the same protrusion height as the annular protrusion peripheral wall portion 4 are integrally formed around these cover fixing attachment holes 14, 14.

Further, in the inner peripheral wall surface portion of the substantially oval annular protruding peripheral wall portion 4 of the coating allowance cover main body 6, the length of the opening 5 for drawing out wiring, piping or the like formed by the annular protruding peripheral wall portion 4 is increased. The projecting piece portions 16 and 16 projecting inward are integrally formed at the center portions facing each other in the direction, and the opening 5 after punching of the lid member 8 is opened and closed in these projecting piece portions 16 and 16. Female screw holes 19 and 1 for fixing the possible box cover 17 via screws 18 and 18.
9 is formed by insert metal fittings. Further, reinforcing ribs 20, 20 are formed on the back surface of the lid member 8, and the protruding pieces 16, 16 of the lid member 8 are formed.
Recesses 21 and 21 having a shape along the outer surfaces of the projecting piece portions 16 and 16 are formed at locations corresponding to.

In the box for burying concrete constructed as described above, the female screw hole 1 on the box body 2 side is formed.
While the box body 2 is carried in to the construction site in a state where the screws 11 and 11 are loosely screwed to the 2, 2, the coating cover body 6 is carried in to the construction site from another orderer or the like. The box body 2 and the coating allowance cover body 6 thus separately carried in are assembled at the construction site. At the time of this assembly, first, they are loosely screwed into the female screw holes 12, 12 on the box body 2 side. Heads 11a, 11a of the screws 11, 11
On the other hand, the coating cover body 6 is attached to the box body 2 so that the circular holes 14a, 14a of the mounting holes 14, 14 on the coating cover body 6 side are aligned with each other, as shown by the phantom line in FIG. It is rotationally displaced around the point, and in this rotationally displaced state, the circular holes 14a, 14a of the mounting holes 14, 14 on the side of the coating allowance cover body 6 are moved to the heads 11a, 11 of the screws 11, 11.
pass through a.

Subsequently, when the coating allowance cover main body 6 is rotationally displaced (returned) around the center point thereof so as to be in the normal mounting posture as shown by the solid line in FIG. 2, the screws of the screws 11 and 11 are screwed. The shaft portions 11b, 11b are the long holes 1 of the mounting holes 14, 14
4b, 14 is moved to the side, and the paint removal cover body 6 is in a state of being prevented from coming off from the box body 2. In this state, screw 11,
By strongly tightening 11, it is possible to fix the coating allowance cover body 6 to the box body 2 in a proper assembling posture, and the female screw hole 1 on the box body 2 side before assembling.
It is not necessary to remove the screws 11 that are loosely screwed to the screws 2 and 12, and the labor of assembling at the site can be saved.

After the box body 2 and the coating cover body 6 are assembled and fixed as described above, for example, as shown in FIG.
From the back side of the box main body 2 via a tension bar 24 that is nailed to one of the pair of molds 23, 23 arranged opposite to each other with the reinforcing bars 22 arranged vertically and horizontally. After being supported, the other mold 23 is erected, and the inner peripheral surface of the other mold 23 is pressed by the annular protruding peripheral wall portion 4 of the coating allowance cover body 6 and the end portions of the cylindrical protruding portions 15, 15. After fixing the whole box in a state of being closely attached, concrete C is placed between the pair of molds 23, 23 to form a concrete structure such as a concrete wall. The central opening 5 of the main body 6 is closed by the annular protruding peripheral wall portion 4 and the lid member 8, and the mounting holes 14, 14 are formed by the cylindrical protruding portion 15,
Since the periphery of the box is closed by 15, it is possible to prevent the concrete slag from entering the box body 2 without closing the hole with gum tape or the like.

In particular, as in the above embodiment, the box body 2 and the coating cover body 6 are rectangular, and the female screw holes 12, 12 on the box body 2 side and the cover mounting hole 14 on the coating cover body 6 side are provided. , 14 and the cylindrical projections 15 and 15 around them are provided at the two corners in the two diagonal directions, respectively, so that the entire box does not rattle against the inner surface of the form 23. Since it is possible to press and tightly fix it, it is possible to more surely prevent a slag from entering the box body 2 when pouring concrete.

The shapes of the box main body 2 and the coating allowance cover main body 6 are not limited to the rectangular shapes as in the above embodiment, but may be circular shapes even if they are polygonal shapes such as hexagons and octagons. May be.

Further, in the above embodiment, when the box body 2 and the coating cover body 6 are rectangular, the female screw hole 1
2 and 12, the cover mounting holes 14 and 14 and the cylindrical projections 15 and 15 are shown by providing a total of four at each of two diagonal corners, but when the entire box is small, It is also possible to provide only a total of two in each of the two diagonal corners.

[0022]

As described above, according to the present invention, when the box body and the coating cover body that are separately carried in are assembled at the construction site, they are formed at a plurality of locations around the opening of the box body. Even if the screws that are loosely screwed into the female screw hole in advance and carried into the site together with the box body are not removed, the coating cover body can be easily attached to the box body by a simple operation while loosely screwing it into the female screw hole. Since it can be fixed, the assembly work at the construction site can be performed easily and quickly with a few steps. However, after the two are assembled and fixed, the inner edge of one of the pair of molds facing each other has an annular projecting peripheral wall portion of the coating allowance cover body and an end of the cylindrical projecting portion formed around the mounting hole. By simply fixing the entire box in a state where the parts are pressed and brought into close contact with each other, it is possible to prevent the concrete slag from entering the box main body without performing the troublesome work such as the purpose of closing the hole with a gum tape.

In particular, when the box body and the coating cover body are rectangular, at least one of the female screw hole on the box body side, the cover mounting hole on the coating cover body side, and the cylindrical protruding portion around the same is formed in at least one diagonal direction. By adopting a configuration provided at both corners, it is possible to press the entire box against the inner surface of the formwork without making it rattle and fix it tightly, further preventing the entry of concrete slag. can do.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a concrete burying box according to an embodiment of the present invention.

FIG. 2 is a front view of an assembled state.

FIG. 3 is a side view showing a half section in an assembled state.

FIG. 4 is a vertical cross-sectional side view showing a state in which a box is fixed between molds.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 peripheral wall part 2 box main body 3 flat plate part 4 annular protruding peripheral wall part 5 opening 6 coating margin cover main body 8 lid member 9 punching piece 11 cover fixing screw 12 female screw hole 14 cover fixing mounting hole 14a circular hole 14b long hole 15 tube Protrusion

Claims (2)

[Claims] 1. A punching piece capable of forming a drawing hole for wiring, piping, etc. by punching is formed on a peripheral wall portion that opens in one direction, and the inner peripheral wall surface of the peripheral wall portion is provided at a plurality of locations around the opening portion. Wiring with a synthetic resin box main body formed with female screw holes into which cover fixing screws can be screwed, and an annular protruding peripheral wall protruding outward at the center of the flat plate part that closes the opening of this box main body A circular shape that forms an opening for drawing out piping, etc., and allows passage of the head of the screw at each of the flat plate portion on the outer periphery of the annular protruding peripheral wall portion facing the female screw hole on the box body side. A synthetic resin coating allowance cover body formed with a cover fixing mounting hole in which a hole and a long hole that prevents passage of the screw head portion and only allows passage of the screw shaft portion of the screw are formed to communicate with each other,
A synthetic resin lid member that is integrally formed with the inner peripheral wall of the annular protruding peripheral wall portion so as to be punched so as to close the opening of the coating allowance cover main body, and is provided around the plurality of cover fixing mounting holes. A concrete burying box characterized in that a cylindrical protruding portion having the same protruding height as that of the annular protruding peripheral wall portion is formed. 2. The box main body and the coating allowance cover main body are rectangular, and the female screw hole on the box main body side, the cover attaching hole at the coating allowance cover main body side, and the cylindrical protruding portion around it are at least one diagonal. The concrete burying box according to claim 1, which is provided at both corners of the direction.