JP2011182584A - Buried box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buried box eliminating the need for installing a structure fixing a box body on the formwork side and being capable of easily exposing the opening of the box body at the desired position of a surface of concrete. <P>SOLUTION: The box body 2 and a support fitting 3 for fixing the buried box 1 to a reinforcement are connected through an extensible adjustor 4, and a distance between the box body 2 and the support fitting 3 can be adjusted. Consequently, the box body 2 can be moved forward until the opening 5 of the box body 2 is closed by the internal surface of a formwork by extending the adjustor 4 in a state with the support fitting 3 fixed to the reinforcement. Accordingly, the box body 2 need not be fixed to the internal surface of the formwork, a magnetic substance need not be fitted on the box body 2, and a thread hole or the like for fixing the box body 2 to the formwork need not be provided unlike conventional devices, thus improving workability and achieving cost reduction or the like. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an embedded box embedded in, for example, a concrete wall surface or ceiling surface.

Conventionally, for example, Patent Document 1 discloses a configuration in which an insert is installed at a desired position on a concrete wall surface or the like. In this method, the mold for injecting concrete is made of iron, and the insert is provided with a magnetic body, and the magnetic body is attracted to the mold to hold the insert at a desired position.
Further, for example, Patent Literature 2 discloses a configuration in which a concave portion intended for use as a buried box or the like is provided on a concrete wall surface. That is, there is also a type in which a recess is formed at a desired position by drilling a bolt hole in a mold and fixing a block body for forming the recess with a bolt in the mold.

  Further, as a buried box that can be installed at a desired position on a concrete wall surface, for example, a box disclosed in Patent Document 3 has been devised. This is because the bar member is inserted in the left and right direction at the upper and lower parts of the burying box, the left and right sides protruding from the burying box of the bar member are bent, and the ends are fixed to the reinforcing bars. It can be supported at a predetermined position.

Japanese Patent Application Laid-Open No. 6-167056 Japanese Patent Laid-Open No. 10-52811 JP 2002-191112 A

However, when it is going to employ | adopt the structure currently disclosed by the said patent document 1 for an embedment box, since it is necessary to use an iron formwork, there exists a problem of the workability fall by a heavy formwork. In addition, the iron formwork has a problem that the manufacturing cost is very high compared to the wooden formwork. Furthermore, when it is going to employ | adopt the structure currently disclosed by patent document 2 to an embedment box, a bolt hole must be pierced one by one in a formwork, and there is a problem that installation work of an embedment box takes time, Once the bolt hole is drilled, the installation position of the buried box cannot be adjusted (particularly, fine adjustment cannot be performed such that the bolt holes overlap), and there is a problem in that it is not easy to use.
In addition, according to the configuration disclosed in Patent Document 3, not only the fixing work of the bar member to the reinforcing bar, but also the thickness of the concrete to be placed varies depending on the site and each object. Depending on the distance to the wall surface (that is, the formwork) of the concrete, the bending angle and the bending length of the bar member must be adjusted, and there is a problem that the positioning work of the buried box is very troublesome.

  Therefore, the present invention has been made in view of the above problems, and it is not necessary to provide a structure for fixing the box body on the mold side, and it can be used regardless of whether the mold is made of wood or metal. An object of the present invention is to provide a buried box which is possible and can easily expose the opening of the box body to a desired position on the surface of the concrete.

In order to achieve the above object, the invention according to claim 1 of the present invention comprises a box-shaped box body having an opening, and is embedded in a state where the opening is exposed on the surface of reinforced concrete. The box is provided with a support member having a fixing portion for fixing to a reinforcing bar, the support member and the box body are connected by an extendable adjusting portion, and the supporting member is fixed to the reinforcing bar. Then, the box main body can be moved to a position where the opening is exposed by extending the adjusting portion.
According to a second aspect of the present invention, in the first aspect of the present invention, the adjustment portion is provided with a first bolt portion protruding from the surface of the box body and a support member, and a screw groove. A second bolt portion whose direction is opposite to the first bolt portion, and a nut-like adjusting member that can be screwed into the first bolt portion from one side and the second bolt portion from the other side. After the support member is fixed to the reinforcing bar, the adjustment member is rotated so that the first bolt portion and the second bolt portion protrude from the adjustment member, and the opening of the box body is exposed. It is made to move to.
According to a third aspect of the present invention, in the first aspect of the present invention, the adjustment portion resists a spring member that connects the box body and the support member in a contracted state, and a biasing force of the spring member. A binding line that connects the box body and the support member, and after fixing the support member to the reinforcing bar, by cutting the binding line, the spring member is extended, and the box body is The opening is moved to a position where it is exposed.

According to the present invention, a support member having a fixing portion for fixing to a reinforcing bar is provided, and the support member and the box body are connected by an extendable adjustment portion, and after fixing the supporting member to the reinforcing bar, By extending the adjusting portion, the box body can be moved to a position where the opening is exposed. Therefore, unlike the conventional case, there is no need to fix the box body to the inner surface of the formwork, and it is not necessary to provide the box body with a magnetic material or to make the formwork made of iron. can do. Moreover, it is not necessary to provide a structure for fixing the box body to the mold, and workability can be improved, costs can be reduced, and the like.
In addition, according to the invention described in claim 2 or 3, the adjustment portion is extended by simply rotating the adjustment member (claim 2) or cutting the bind line (claim 3). Can be moved to a position where the opening is exposed, so that the operation can be performed very easily as compared with the conventional one in which the bending angle of the bar member or the like must be adjusted.

It is explanatory drawing which looked at the burial box from the front. It is explanatory drawing which looked at the burial box from back. It is explanatory drawing which looked at the buried box from the side It is explanatory drawing at the time of extending the distance between a box main body and a support metal fitting. It is explanatory drawing which showed typically the operation | work which installs a burial box. It is explanatory drawing which showed typically the operation | work which installs a burial box. It is explanatory drawing which showed the example of a change of a burying box. It is explanatory drawing which showed the other example of a change of a burying box.

  Hereinafter, a buried box according to an embodiment of the present invention will be described in detail with reference to the drawings.

First, the structure of the buried box 1 will be described. FIG. 1 is an explanatory view of the embedded box 1 as viewed from the front, and FIG. 2 is an explanatory view of the embedded box 1 as viewed from the rear. Moreover, FIG. 3 is explanatory drawing which looked at the burying box 1 from the side, and FIG. 4 is explanatory drawing at the time of extending the distance between the box main body 2 and the support metal fitting 3. FIG.
The buried box 1 includes a box-shaped box body 2 in which terminal fittings 51 and the like are installed, a support fitting 3 for fixing itself to a reinforcing bar 50 (shown in FIG. 5), a box body 2 and a support fitting 3. And an adjustment unit 4 for adjusting the distance between the box main body 2 and the support fitting 3.

  The box body 2 is a metal box-like member having an opening 5 on the front surface, and is provided with a flange 6 which is embedded in concrete around the opening 5 and functions as a retaining member for the box body 2. Reference numeral 7 denotes a rib projecting forward from the edge of the opening 5 so as to surround the opening 5, and a cover or a wiring device (not shown) is provided on the upper side and the lower side of the rib 7. Boss holes 8 and 8 for attachment are formed respectively. Further, a terminal fitting 51 and the like are installed in the box body 2 so that, for example, a ground wire of an electric device such as an air conditioner can be connected. In addition, at the center of the rear surface of the box main body 2, a first bolt portion 9 constituting the adjustment portion 4 is projected rearward.

  The support fitting 3 is a metal plate-like member that is long in the vertical direction, and the upper end portion of the support fitting 3 is bent into an arc shape and then folded back, and then is opposed to the opposing plate-like portion, the bolt 11 and the support fitting. It is connected with a welded nut 12, and after the rebar 50 is inserted into the arcuate portion with the bolt 11 removed, the bolt 11 is tightened to fix itself to a predetermined position of the rebar 50. The unit 13 is configured. Further, the lower end portion of the support fitting 3 is divided into three support pieces 14a, 14b, and 14c, and the central support piece 14b is suspended as it is along the plate-like portion, while the left and right support pieces 14a. , 14c are suspended after being bent backward. The support piece 14b is positioned in front of the reinforcing bar 50, and the support pieces 14a and 14c are positioned behind the reinforcing bar 50, so that the reinforcing bar 50 can be sandwiched from the front and rear by the support pieces 14a, 14b and 14c. Further, a second bolt portion 10 that constitutes the adjustment portion 4 protrudes forward in the center of the front surface of the support fitting 3. The bolt hole 15 for inserting the bolt 11 is a long hole extending in the vertical direction, and the tightening position of the bolt 11 can be adjusted in the bolt hole 15 according to the thickness of the reinforcing bar 50. Yes. Moreover, 16 is a recessed part recessed in the back provided in support piece 14a-14c, and has a function which reinforces each support piece 14a-14c.

  As described above, the adjustment unit 4 connects the first bolt unit 9 provided on the box body 2, the second bolt unit 10 provided on the support fitting 3, and the first bolt unit 9 and the second bolt unit 10. And the adjusting member 20 to be operated. The 1st bolt part 9 and the 2nd bolt part 10 are male screw parts by which the thread groove was carved in the peripheral surface, and the direction of a thread groove is made into the opposite direction mutually. Further, the adjusting member 20 is a female screw member having a thread groove formed on the inner peripheral surface, similar to the nut used for the turnbuckle, and the length in the front-rear direction is the first bolt portion 9 and the second bolt. The total length of the part 10 is substantially the same. The first bolt portion 9 and the second bolt portion 10 are connected to each other by a so-called turnbuckle structure in which the first bolt portion 9 is screwed from the front of the adjusting member 20 and the second bolt portion 10 is screwed from the rear, that is, a box. The main body 2 and the support fitting 3 are connected. Therefore, when the adjustment member 20 is rotated, the first bolt part 9 gradually protrudes forward and the second bolt part 10 protrudes rearward. That is, the adjustment unit 4 can be extended by rotating the adjustment member 20.

The installation method of the burying box 1 comprised as mentioned above is demonstrated based on FIG.5 and FIG.6. 5 and 6 schematically show the buried box 1, the reinforcing bar 50, the mold 52, and the like, and the ribs 7 and the like provided on the box body 2 are omitted.
First, the reinforcing bars 50, 50... Are installed on the base in the vertical direction, and the reinforcing bars 50, 50... Are installed in the horizontal direction so as to be bridged over the reinforcing bars 50, 50. .. are assembled in a lattice shape (FIG. 5A). Moreover, the formwork 52, 52 ... is installed so that the circumference | surroundings of the assembled reinforcing bars 50, 50 ... may be enclosed (FIG.5 (b)). FIG.5 (c) has shown the end surface between the reinforcing bars 50 and 50 installed in the perpendicular direction in the said state.

  And the burying box 1 is fixed to the desired position of the reinforcing bars 50 in the assembled state (FIG. 5D). That is, the rebar 50 installed in the horizontal direction is inserted into the fixing portion 13 and the rebar 50 installed therebelow is sandwiched by the support pieces 14a, 14b, 14c from the front-rear direction. And after adjusting the position of the burying box 1 along the horizontal reinforcing bars 50 and 50, if the bolt 11 is tightened, the burying box 1 will be fixed to the reinforcing bars 50 and 50 in a desired position.

  Next, the adjusting member 20 is rotated to extend the adjusting unit 4, and the box body 2 is moved forward. Then, the front surface of the box body 2 (specifically, the most protruding surface of the rib 7) is brought into contact with the inner surface of the mold 52, and the opening of the box body 2 is closed by the mold 52 (FIG. 6A). ). Thereafter, concrete 53 is placed in the molds 52 and 52 (FIG. 6B). After the concrete 53 is cured, the molds 52 and 52 are removed (FIG. 6C), and the wall surface of the concrete 53 is obtained. The opening 5 of the box body 2 is exposed to form a recess (FIG. 6D).

  According to the buried box 1 as described above, the box body 2 and the support fitting 3 for fixing the buried box 1 to the reinforcing bars 50 and 50 are connected via the extendable adjustment portion 4. The distance between the main body 2 and the support fitting 3 can be adjusted. Therefore, by extending the adjusting portion 4 from the state in which the support metal fitting 3 is fixed to the reinforcing bars 50, 50, the opening 5 of the box body 2 is closed from the inner surface of the mold 52, that is, the opening 5 from the concrete surface. The box body 2 can be moved forward to the exposed position. Therefore, unlike the conventional case, it is not necessary to fix the box body 2 to the inner surface of the mold 52, and it is not necessary to provide the box body 2 with a magnetic material or to make the mold 52 made of iron. Can also be adopted. In addition, there is no need to provide a screw hole or the like for fixing the box body 2 to the mold 52, so that workability can be improved and costs can be reduced.

  Further, an upper end portion of the support fitting 3 has an arc-shaped portion through which the reinforcing bar 50 can be inserted, and a fixing portion 13 capable of fixing itself to the reinforcing bar 50 inserted into the arc-shaped portion by tightening the bolt 11 3, support pieces 14a, 14b, and 14c that sandwich the reinforcing bar 50 from the front-rear direction are provided. Therefore, the fixing to the reinforcing bar 50 is very easy as compared with the conventional one in which the bar member is tied to the reinforcing bar using a wire or the like.

  Furthermore, the adjustment part 4 includes a first bolt part 9 provided on the box body 2, a second bolt part 10 provided on the support fitting 3, and an adjustment member 20 that is a nut body that connects the bolt parts 9 and 10. It can be extended by rotating the adjusting member 20. Therefore, in order to close the opening 5 with the inner surface of the mold 52, the adjusting member 20 may be rotated after the fixing to the reinforcing bar 50 to extend the adjusting portion 4, and the bending angle of the bar member must be adjusted. Compared with the conventional one, the operation can be performed very easily.

  The buried box according to the present invention is not limited to the embodiment described above, and the configuration of the adjusting portion and the support metal fittings are appropriately changed as necessary without departing from the spirit of the present invention. can do.

For example, in the above-described embodiment, the extendable adjustment unit is configured using a bolt and a nut, but a configuration using a spring member 28 as shown in FIG. 7 may be employed. Here, the buried box 21 shown in FIG. 7 will be described. In addition, the same code | symbol is attached | subjected about the same component as the said embodiment.
In the buried box 21, the box body 2 and the support fitting 3 are connected by an adjustment unit 25. The adjusting portion 25 is provided with a first cylindrical portion 26 as a guide portion protruding rearward on the rear surface of the box body 2, and protruded forward on the front surface of the support fitting 3, and is attached to the first cylindrical portion 26. The second cylindrical portion 27 as a guide portion that can be fitted, the spring member 28 that is housed in the first cylindrical portion 26 in a contracted state, the box body 2 and the support metal fitting against the biasing force of the spring member 28 3, and a bind line 29 that connects 3 to each other. According to this buried box 21, when the bind wire 29 is cut after being fixed to the reinforcing bar in the same manner as the buried box 1 of the above embodiment, the adjusting portion 25 is extended by the urging force of the spring member 28, and the opening 5 of the box body 2. Is in contact with the inner surface of the mold to be closed. Therefore, even if the burying box 21 is employed, the opening 5 of the burying box 21 can be closed with the inner surface of the mold by a simple operation without the need to provide a structure for fixing the box body 2 on the mold side. The same effects as the embedding box 1 of the above embodiment can be obtained.
In addition, the structure which concerns on a guide part is good also as a structure which externally fits a 1st cylindrical part to a 2nd cylindrical part contrary to the said example of a change, and is not fitting a cylindrical part mutually, but a cylinder. It is good also as a structure which inserts a columnar part in a shape part, forms a guide part, and makes a cylindrical part carry out an exterior about a spring member.

Moreover, it is good also as a structure as shown in FIG. 8 about the fixing | fixed part for fixing a support metal fitting to a reinforcing bar. Here, the buried box 31 shown in FIG. 8 will be described. In FIG. 8, the same components as those in the above embodiment are denoted by the same reference numerals.
The buried box 31 is formed by connecting the box main body 2 and the support fitting 32 by the adjustment unit 4, and an elongated bolt hole (not shown) that is long in the vertical direction is formed at the upper end of the support fitting 32. The fixing plate 33 which is continuously provided in the vertical direction and has a recessed portion recessed backward is attachable from the rear surface by two sets of bolts 11 and 11 and nuts 12 and 12 welded to the fixing plate 33. The rebar can be clamped and fixed from the front and rear by the support metal fitting 32 main body and the fixing plate 33. According to the buried box 31, when the support fitting 32 is fixed to the reinforcing bar, the vertical position of the box body 2 is adjusted by adjusting the mounting position of the fixing plate 33 to the support fitting 32 body using the bolt holes. Can be adjusted. Therefore, a recessed part can be formed in desired positions, such as a wall surface of concrete, more easily than the embedding box 1 of the said embodiment.

Further, in the above-described embodiment and modification, the buried box is made of metal, but there is no problem even if it is made of synthetic resin, and the material of the buried box can be changed as appropriate.
Furthermore, it is possible to change how the inside of the box body 2 is used, such as whether or not to install the terminal fitting 51 inside the box body 2, and it is limited to the connection of the ground wire. In addition, the design of the presence or absence of the flanges 6 and ribs 7 provided in the box body 2 can be changed as appropriate.
In addition, in fixing the embedding box to the reinforcing bar, in the above embodiment, the embedding box is fixed after the formwork is assembled. After fixing the embedding box, the formwork is assembled, and then the adjustment unit is extended to open the opening. There is no problem even if the fixing method is to block.

  1, 2, 31 ... Embedded box 2. Box body 3, 32 ... Support bracket (support member) 4, 25 ... Adjusting part 5. Opening 9 ... First bolt part 10 .. second bolt part, 11 .. bolt, 12 .. nut, 13 .. fixing part, 14 .. support piece, 20 .. adjustment member, 26 .. first cylindrical part, 27 .. second cylinder , 28 .. Spring member, 29 .. Binding wire, 33 .. Fixing plate (fixing part).

Claims (3)

It is provided with a box-shaped box body having an opening, and is an embedded box embedded in a state where the opening is exposed on the surface of reinforced concrete,
A support member having a fixing portion for fixing to a reinforcing bar is provided, and the support member and the box body are connected by an extendable adjustment portion,
An embedded box, wherein the box body can be moved to a position where the opening is exposed by extending the adjusting portion after fixing the support member to the reinforcing bar. A first bolt part projecting from the surface of the box body; a second bolt part projecting from the support member; and a thread groove direction opposite to the first bolt part; The first bolt part from one side, and the second bolt part from the other side, respectively, and a nut-shaped adjustment member that can be screwed,
After fixing the support member to the reinforcing bar, by rotating the adjustment member, the first bolt part and the second bolt part protrude from the adjustment member, and the box body is moved to a position where the opening is exposed. The buried box according to claim 1, wherein: The adjustment unit includes a spring member that connects the box body and the support member in a contracted state, and a bind line that connects the box body and the support member against the urging force of the spring member.
2. The fixing device according to claim 1, wherein after fixing the support member to the reinforcing bar, the binding member is cut, whereby the spring member is extended, and the box body is moved to a position where the opening is exposed. Burial box.

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