JP791H - Method of embedding concrete embedding in concrete wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete buried object (hereinafter referred to as a buried object) on a reinforcing bar forming a skeleton of a concrete wall of a concrete building.
And a method of burying an embedded object in a concrete wall. The present invention relates to a method for burying an embedded object which can be applied not only to a conventional concrete placing method using a wooden formwork but also to a concrete placing method using a plastic formwork which has been recently developed. (Prior Art) Recently, in the case of constructing concrete walls such as slabs, a concrete placing method using a plastic formwork with a substantially trapezoidal cross section has been developed. In this case, the buried object is buried in the concrete wall. In order to do so, first, the buried object was fixed on the formwork with double-sided tape, and then concrete was placed. However, since the worker was encouraged on the formwork, the buried object was blown out, and it was easy to remove it because the tape was fixed. In addition, when the tape is fixed, there is a problem that the impact is generated when the concrete is poured and a gap is generated so that the concrete easily enters the buried object. Further, in the case of the concrete placing method using a wooden form which is a conventional method, the buried object was nailed and fixed to the form, but the nailing work is arranged first. It was troublesome because nailing work was done between the reinforcing bars. In addition, even after removing the formwork, the nails for fixing the buried object remain on the concrete wall, and the remaining nails rust and are exposed on the wall surface over time, and the appearance of the wall surface may be damaged later. there were. Therefore, post-treatment such as removal of nails is required. (Purpose) The present invention has been made in view of such circumstances, and unlike the above-described method of fixing an embedded object to a formwork with a tape or a nail, the embedded object is provided with a support member that can be manually folded, and the Bend with and erected on the steel frame that forms the skeleton of the concrete wall,
By positioning an embedded object, it is intended to embed the embedded object in a predetermined concrete wall by a simple operation. (Structure) The method for burying a concrete buried object in the present invention is to provide a support member that can be manually bent in a three-dimensional direction in the buried object, arrange a reinforcing bar to be a skeleton of a concrete wall, and then propel a formwork. A supporting member is erected on the rebar in advance, the supporting member is bent by hand to position the embedded object, and then the mold is leaned against the embedded object, and then concrete is poured. Hereinafter, the present invention will be described by taking a box for electric wiring as an example of a buried object. First, a reinforcing bar that is a skeleton of a concrete wall is laid out by a known method of reinforcing bar construction that is usually performed. Next, a support member that can be manually folded into the electrical wiring box (1).
(2) is provided. In this case, as shown in FIG. 1, a case where the box (1) made of metal is inseparably attached by spot welding or the like, and as shown in FIG. 2, a support formed separately from the box (1) is used. In some cases, the member (2) may be attached to the outer wall of the box (1). In the latter case, the support member (2) is
It consists of a support rod (30) and a mounting plate (9) .The mounting plate (9) of the support member (2) is provided with a protruding piece (10) by cutting and raising, and the box (1) has a protruding piece (10). A mounting hole (11) for inserting is inserted. Then, insert the projecting piece (10) into the mounting hole (11) of the box (1), project the tip of the projecting piece (10) inward of the box (1), and this part of the box (1) The support member (2) is attached to the box (1) by bending toward the inner wall. The support rod (30) of the support member (2) should have sufficient tensile strength to the extent that the box (1) is in close contact with the form (6) when the form (6) is leaned against the box (1). Good. Specifically, it is commonly called a No. wire, and among them, a mild steel wire having a size around the No. 8 wire is most suitable. After providing the support member (2) on the box (1), as shown in FIG. 3, the support member (2) is manually bent so that the box (1) is embedded at a predetermined position, and the box (1) is then folded. While the positioning is performed, the supporting member (2) is installed on the reinforcing bar (3) arranged before the model frame (6) is leaned. This is based on the following procedure.
First, a support member provided on the outer wall of the box (1) at a position where the box (1) is supposed to be embedded at a substantially predetermined position.
Bend (2) by hand so that it touches the reinforced rebar (3). At this time, the reinforcing bar (3) in contact with the supporting member (2) may be in contact with any reinforcing bar (3) as long as the supporting member (2) is within the range. In other words, it may be a vertically running reinforcing bar (3) or a horizontally running reinforcing bar (3), and depending on the reinforcing bar (3) arrangement,
The supporting member (2) may be manually bent and brought into contact with the reinforcing bar (3) which can be easily installed. Next, the position of the box (1) is further adjusted, and while positioning, the portions where the reinforcing bar (3) and the supporting member (2) are in contact are sequentially bound with a wire (7), etc., and the supporting member (2) is rebared. Install in (3). The installation state at this time is the box
The box (1) is leaned toward the opening of (1) so that the opening of the box (1) is slightly forward (in the direction of the arrow (8)), and the box is set by leaning the formwork after erection.
It is preferable that the opening of (1) is in close contact with the mold (6). (See FIG. 4) In this way, the supporting member (2) provided on the box (1) is installed on the reinforcing bar (3). Incidentally, in the case of this example, the end of the conduit tube (4) to be buried in the concrete wall is inserted into the knockout (5) of the box (1), and the box (1) and the conduit tube (1) 4) and are connected.
In the case of an embedded object such as an insert that does not connect the conduit (4), the above work is not necessary. In this way, the box (1) is positioned and the support member (2)
After laying on the rebar (3), the form (6) is then leaned against the opening of the box (1) as shown in FIG. Then, the opening of the box (1) is brought into contact with the form (6). At this time, the box (1) is pressed toward the mold (6) by the tensile strength of the support member (2). In this state, concrete is placed around the box (1). After placing and curing concrete, finally formwork (6)
Remove. In this way, as shown in FIG. 5, the box (1) which is the buried object can be easily buried. Although the electric wiring box (1) has been described above as an example, it is needless to say that other buried objects such as conduit terminal protectors and inserts can also be buried by the method of the present invention. FIG. 6 shows a state in which a conduit tube terminal protector generally called an end cover (14) is embedded. In the case of this example, the support member (2) is constructed separately from the end cover (14), and the insertion hole (13) is provided on one side of the substantially L-shaped mounting plate (12), and the other side is formed. Support bar (2
0) is fixed. In this case, the connector (15)
Insert the male screw part (24) of the
From the inside of 4), attach the stopper (25) with female thread cut to the external thread (24).
The support member (2) is inserted between the end cover (14) and the connector (15), and the support member (2) is attached. When burying the end cover (14), first the reinforcing bar (3) is laid out, and then the supporting bar (20) of the supporting member (2) is bent by hand to position the end cover (14) while positioning the supporting bar (14). Bring 20) to rebar (3). And wire this (7)
The support rods (20) are erected on the reinforcing bars (3) by bundling them together. Next, the form (6) is leaned against the opening of the end cover (14), and the end cover (14) is brought into contact with the form (6). Concrete pouring is performed in this state, and the end cover (14) is embedded in the concrete wall. FIG. 7 shows a state in which a conduit tube terminal protector generally called a temporary frame bushing (16) is embedded. In the case of this example, the support member (2) is configured separately from the temporary frame bushing (16), and a support rod that can be manually bent on the disc-shaped mounting plate (18).
(28) is fixed, and an insertion hole (17) is formed in the center of the mounting plate (18). In the case of this example, the male screw portion (26) of the connector (19) is inserted into the insertion hole (17), and the stopper (27) obtained by taking the male screw from the inside of the temporary frame bushing (16) is attached to the male screw portion (26). The support member (2) is inserted between the temporary frame bushing (16) and the connector (19) by being screwed into the support frame, and the support member (2) is attached. When burying the temporary frame bushing (16), first rebar (3)
After arranging, the supporting bar (28) of the supporting member (2) is manually bent to position the temporary frame bushing (16) and bring the supporting bar (28) into contact with the reinforcing bar (3). Then, this is bound with a wire (7) or the like, and the support rod (28) is installed on the reinforcing bar (3). Next, the mold (6) is leaned against the opening of the temporary frame bushing (16), and the temporary frame bushing (16) is brought into contact with the mold (6). Concrete is placed in this state. The temporary frame bushing (16) is embedded in the concrete wall. FIG. 8 shows a state in which the insert (21) is buried. In the case of this example, the support member (2) is configured separately from the insert (21), and the supporting plate (29) which is bendable by hand is fixed to the substantially plate-shaped mounting plate (23), and the mounting plate (23) Insert In (21)
A fitting insertion portion (22) that can be forcedly fitted into the head of the person is provided. In the case of this example, the fitting portion (22) is fitted into the head of the insert (21) to fix the support member (2). When embedding the insert (21), first the reinforcing bar (3) is laid out, and then the supporting bar (29) of the supporting member (2) is bent by hand to position the insert (21) while supporting the supporting bar.
Place (29) on rebar (3). Then, this is bound with a wire (7) or the like, and a support rod (29) is installed on the reinforcing bar (3). Next, the mold (6) is leaned against the opening of the insert (21) to bring the insert (21) into contact with the mold (6). In this state, concrete is placed and the insert (21) is embedded in the concrete wall. When the insert (21) is made of metal, the support rod (29) may be directly fixed to the head of the insert (21) by spot welding. (Effect) According to the present invention, when nailing and fixing an embedded object which has been conventionally performed to a wooden form, it is necessary to perform nailing work between the rebars that have been arranged first. Complicated, and compared to the labor of post-treatment of nails after removing the formwork,
Since the buried object is positioned before the mold is leaned, the work is easy and quick processing is possible, and if the mold is set up, the buried object can be brought into close contact with the mold and after removing the mold. No post-treatment such as nail treatment is required. Therefore, the work efficiency of burying the buried object in the concrete wall can be improved. Further, since the support member provided on the buried object can be freely bent by hand, it is possible to freely set the erected state on the reinforcing bar, and therefore the work is highly adaptable and the buried object can be It can be installed according to the situation of the place to be buried. For example, as shown in FIG. 9, when the support member (2) is erected on the reinforcing bar (3) forming a fulcrum vertically and horizontally, the reinforcing bar (3), which is most easily erected, may be bound with the wire (7). . That is, to one end of the support member (2) to the reinforcing bar (3) running vertically,
The other end may be installed on the horizontal reinforcing bar (3). Also, the tenth
As shown in FIGS. 11 and 12, even when the distance L between the reinforcing bar (3) and the form (6) is different, the embedding position of the box (1) can be easily adjusted by the bending condition of the support member (2). be able to. Further, even when the depth of the box (1) is different, the box (1) can be similarly adjusted depending on the bending condition of the support member (2), which is highly adaptable. Further, in the present invention, even when a plastic mold (6) is used as shown in FIG. 12, the box (1) can be abutted and embedded in the mold (6). Moreover, in comparison with the case where the box (1) is fixed to the plastic formwork (6) by tape, the support member (2) according to the present invention.
The box (1) can be firmly fixed by erected the rebar on the rebar (3).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are perspective views of a box for electric wiring used in the embedding method of the present invention, and FIG. 3 is a perspective view showing a state in which a supporting member of the box is installed on a reinforcing bar, FIG. 4 is a cross-sectional view of the formwork leaning against the surface, FIG. 5 is a cross-sectional view of the formwork being removed by removing the formwork, and FIG. 6 is a cross-sectional view showing a state where the end cover is buried. 7 is a sectional view showing a state in which a bushing is embedded, FIG. 8 is a sectional view showing a state in which an insert is embedded, and FIG. 9 is a front view for explaining a state in which a box supporting member is erected on a reinforcing bar, 10 and 11 are cross-sectional views for explaining the installation state of the support member of the box embedded in the slab, and FIG. 12 shows the state in which the box is embedded in the slab when a plastic form is used. It is sectional drawing shown. In the figure, (1) is a box, (2) is a support member, (3) is a reinforcing bar, (6)
Is a formwork, (14) is an end cover, (16) is a temporary frame bushing,
(21) is an insert.

Claims (1)

[Claims] [Claims] [Claim 1] A concrete buried object is provided with a support member that can be manually bent in three-dimensional directions, and a reinforcing bar serving as a skeleton of a concrete wall is reinforced, and then a formwork is formed. Before erection, the support member of the concrete buried object is manually bent to position the concrete buried object, and the support member is erected on the reinforcing bar, and then the mold is erected so as to contact the concrete buried object. A method for embedding a concrete embedding material in a concrete wall, which is characterized by placing the material.