JPH0358023B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides an erection tool for fixing a box installed between formwork in a state in which the box is pressed against the formwork before concrete is poured. Regarding.

(Prior art) Conventionally, in order to install a box between formworks, the first
As shown in Figure 7, support steel reinforcement 5 arranged vertically and horizontally
The formwork 6b is erected on one side of the box 10, and a bar 80 that can be stretched between the formworks is attached to the box 10.
The base end of is fixed to one of the upright formworks 6b with nails,
Next, the other formwork 6a is erected, and the other formwork 6a is erected.
A and box 10 were brought into close contact.

In this conventional installation work, it is extremely troublesome to adjust the length of the bars according to the spacing between the formworks, and in order to nail the base ends of the bars to the formworks, it is necessary to arrange reinforcing bars vertically and horizontally. The work is difficult because the work must be performed across the support beam 5, and there are problems such as the bars intersect with the support support and it is not possible to install the box at the desired position.

The present inventor attached a support member to a buried object such as a box that can be bent by hand and has a tensile strength that can press the buried object against the formwork from the back side in a bent state, and supports the supporting member of the concrete wall. The support member is fixed to the reinforcing bars forming the shape, and then the formwork is brought into contact with the buried object to press the buried object against the formwork, and concrete is poured as it is,
We devised a method for burying objects within concrete walls. According to this method, by adjusting the bending of the support members, it is easy to install objects that match the spacing between the formwork, and if the formwork is set upright, the objects can be buried while being pressed against the formwork. Since the object is positioned, work efficiency can be improved. Therefore, the conventional difficult work of nailing the base end of the bar to the formwork across the strut reinforcing bars, and the installation of boxes at desired locations where the bars intersect with the strut reinforcing bars, are now possible. It is possible to solve conventional problems that were said to be impossible. In addition, the conventional method uses a formwork to fix the buried object, so the buried object cannot be fixed until the formwork is erected, which limits the work setup, but the above method Since the buried objects are fixed with reinforcing bars, such problems do not occur.

(Problems to be Solved by the Invention) The present invention has been made as part of such development, and is a method for constructing concrete-embedded boxes that can be easily and quickly installed between formworks to improve work efficiency. The purpose of the present invention is to provide a tool for constructing a box.

(Means for Solving the Problems) The erection tool according to the present invention is an erection tool for fixing a box installed between formwork in a state where the box is pressed against the formwork before concrete is poured. It is a linear type that can be bent by hand, has the tensile strength to press the box against the formwork from the back side of the box in the bent state, and is fixed to the reinforcing steel that forms the support frame of the concrete wall. a support rod,
It has a plate-shaped mounting body that holds the linear support rod and is attached to the back of the box that is buried in the concrete wall.

(Function) With the erection tool for boxes for concrete burial according to the present invention, by adjusting the degree of bending of the linear support rods and fixing them to the support beams, the boxes can be built according to the spacing of the formwork. The box can be easily installed, and the box can be brought into close contact with the formwork while being constantly pressed against the formwork, which is brought into contact with the opening of the box.

When using such an erection tool, when the support rod of the erection tool is fixed to the reinforcing steel, even if the opening of the box is located somewhat forward of the standing position of the formwork, the formwork can be pressed against the opening of the box. The box can be installed at a predetermined location by retracting the box with its opening in close contact with the formwork, and it can also easily accommodate different wall thicknesses by adjusting the bending of the support rod. .

(Example) Hereinafter, the construction tool according to the present invention will be explained according to the drawings.

In FIGS. 1 and 2, the support rod 1 is a part that is installed on reinforcing bars 5 that form the supporting frame of a concrete wall. The support rod 1 can be bent by hand, and the bending direction can be freely set. Regarding the specific shape of the linear support rod 1,
Various types of reinforcing bars can be considered, such as those with a circular cross section, square ones, or flat ones, but in particular, the reinforcing bars 5 that form the support
Those with a circular cross section are superior in terms of ease of erection and flexibility in bending direction. Specifically, it is commonly called a wire, and among them, mild steel wire around number 8 is optimal. Further, the support rod 1 has a tensile strength capable of pressing the box against the formwork in a bent state, and as shown in FIG.
When the box 4 is pressed against the formwork 6,
In response to a force applied to the box 4 in the direction of the arrow 61, the support rod 1 has a pressing force that pushes the box 4 in the direction of the arrow 62 so as to be opposed to the force in the direction of the arrow 61 when the support rod 1 is bent. In this state, the box 4 is kept pressed against the formwork 6 by the support rod 1, in other words, kept in close contact with it.

The attachment body 2 has a structure for attaching the support rod 1 to the box 4. There are various methods of attachment, such as attachment by screws and attachment by fitting. The shape of the mounting body 2 may take various forms depending on the outer shape of the box 4. However, as shown in Fig. 2, the pressure of the support rod 1 (arrow 63) is uniformly applied to the box (box for electrical wiring) 4 from the viewpoint of adhesion to the formwork. preferable.

FIGS. 3 to 11 show examples of installation tools to be attached to the box 10 for electrical wiring. FIG. 3 is a plan view of the erection tool, and FIG. 4 is a sectional view taken along line A-A of the erection tool. In this example, it consists of a linear support rod 11 that can be bent by hand and a plate-shaped attachment body 12, and the support rods 11 are arranged in parallel on both sides of the attachment body 12. The mounting body 12 has a protrusion 13 cut and raised to fit into a hole 18 provided on the back surface of the box 10.

The support rod 11 is fitted into recesses 14 formed on both sides of the mounting body 12 and having a semicircular cross section, and is fixed to the mounting body 12 by spot welding. this is,
For example, the recess 14 of the mounting body 12 is formed of an elastic member, and the inner diameter of the recess 14 is smaller than the diameter of the support rod 11, so that the elasticity of the recess 14 is utilized to force the support rod 11 into the recess 14. Alternatively, the mounting body 12 may be fitted into the mounting body 12.
The support rod 11 may be wrapped around the end of the support rod 11 and fixed by caulking a part or all of the end.
Simply attach the support rod 11 to the mounting body 12 without forming a
It may be fixed by spot welding.

15 is a screw hole, and the mounting body 12 is connected to the box 10.
When attached to the box 10, the box 10 is formed to match the through hole 17 provided in the box 10. As shown in FIG. 16, a separate stud bolt 90 having a male thread is screwed into the screw hole 15 and the through hole 17. When installing the box 10 on a wall, the box 10 and the formwork 6
This is used to more reliably and closely fix the parts. Therefore, if the screw hole 15 is not required, it may be sealed with a lid 19, as shown in FIG. Alternatively, the screw hole 15 may be omitted. 16 is a reinforcing rib for preventing deformation of the mounting body 12.

FIG. 6 shows a sectional view of the construction tool attached to the box 10. In this example, an insertion hole 18 is formed in the outer wall of the box 10, into which the protrusion 13 of the mounting body 12 is inserted. first,
The protruding piece 13 of the mounting body 12 is directed toward the outer wall of the box 10, and then inserted into the insertion hole 18 formed in the outer wall of the box 10, so that the tip of the protruding piece 13 is made to protrude inside the box 10. Next, this protruding portion is bent toward the inner wall of the box 10, as shown in FIG. At this time, as shown in FIG. 6, if the tips of the projecting pieces 13 are bent in opposite directions as shown by arrows 64 and 65, the mounting body 12 will be difficult to come off from the box 10. In this way, the outer wall of the box 10 is held between the projecting pieces 13 and the mounting body 12 is fixed to the box 10. With this structure, the installation tool can be attached to the box 10. In addition, the protrusion 1 to be cut and raised
The direction 3 is not limited to the vertical direction, but may be the horizontal direction.

Next, referring to FIG. 9, a case will be described in which the box 10 with the installation tool attached is buried in a concrete wall constituting the wall surface. When burying the box 10, first, the linear support rod 11 is bent by hand and brought into contact with the reinforcing bar 5 that is laid around to form a supporting frame of the concrete wall. At this time, box 1
The degree of bending of the support rod 11 is adjusted so that the support rod 11 is at a position where it is buried in the concrete wall. Support rod 1
1 can be bent by hand, making adjustment easy. Next, the contact portions of the support rod 11 and the reinforcing bars 5 are tied together with wires 7 or the like, and the support rods 11 are installed on the reinforcing bars 5. In this manner, the box 10 is installed at a predetermined buried position as shown in FIG. In the figure, 8 is a conduit connected to the box 10, and 9 is a connector that connects the box 10 and the conduit 8.

Next, as shown in FIG. 10, the mold 6 is brought into contact with the opening of the box 10. At this time, the box 10 is pressed in the direction of the arrow 66 by the tensile strength of the support rod 11, and the box 10 is kept in close contact with the formwork 6.

In the present invention, since the support rod 11 can be bent freely by hand, for example, even if the reinforcing bars 5a are arranged as shown by dotted lines in FIG. It can be easily bent as shown by the dashed line in the figure and installed on the reinforcing bars 5a. Further, depending on the reinforcing bars 5, one of the support rods 11 may be installed on the reinforcing bars 5b running vertically in FIG. 10.

After the support rods 11 are installed on the reinforcing bars 5 and the formwork 6 is brought into contact with the opening of the box 10, concrete is poured and the box 10 is placed inside the concrete wall 90 as shown in FIG. to be buried.

The above-mentioned burying method is an example of a method of burying the box 10 in a concrete wall that constitutes a wall surface, and a method of burying the box 10 by first leaning the formwork 6 against it and burying the box 10 may also be used. ,
It is possible to use the erection device according to the invention. In this case, the box 10 may be brought into contact with the formwork 6, and the support rod 11 of the erection tool may be bent by hand so that the opening of the box 10 is brought into close contact with the formwork 6, and the box 10 may be placed on the reinforcing bar 5.

12 to 14 show other examples of the erection tool to be attached to the box 10. In this example, the mounting body 12 of the erection tool is provided with a hole 20 instead of a protrusion 13. Box 10
A hole 21 that matches the hole 20 is provided in the outer wall of. In this case, the erection tool may be attached to the box 10 by screwing the tapping screws 22 into the holes 20 and 21 as shown in FIG. 13, or the erection tool may be attached to the box 10 as shown in FIG. As shown in FIG. 2, a bolt 23 may be passed through the holes 20 and 21, and a nut 24 may be screwed from the tip of the bolt 23 passing through, thereby attaching the erection tool to the box 10.

(Effects of the Invention) As explained above, the erection tool for a box for concrete burial according to the present invention allows the box installed between formworks to be pressed against the formwork before concrete is poured. An erection tool for fixing the box, which can be bent by hand and has the tensile strength to press the box against the formwork from the back side of the box in the bent state, and is a reinforcing bar that forms the supporting frame of the concrete wall. By having a linear support rod that is fixed to the support rod, and a mounting body that holds the linear support rod and is attached to the back of the box that is buried in the concrete wall, the linear support rod can be fixed to the By adjusting the degree of bending, the box can be easily installed according to the spacing between the formwork, and the box can be brought into close contact with the formwork while being constantly pressed against the formwork that is brought into contact with the opening of the box. I can do it. Therefore, positioning of the box and pressing against the formwork can be easily and reliably performed, and work efficiency can be improved. Also, the mounting body allows it to be easily attached to the back of the box.

As a result, the conventional difficult work of nailing the base end of the bar to the formwork across the strut reinforcement, and the difficulty of installing the box in the desired position because the bar and the strut reinforcing bar intersect, are no longer possible. It can solve traditional problems. In addition, since the conventional method uses formwork to fix the buried objects, it is not possible to fix the buried objects until the formwork is erected, making it difficult to set up the work.
However, the above method does not cause such problems because the buried object is fixed with reinforcing bars.

Furthermore, in the case of the erection tool according to the present invention, a conventional box for attaching the erection tool can be used;
It can be conveniently installed on the back of an existing box depending on the need for burial.

The construction tool according to the present invention can also be used in a construction method using a recently developed plastic formwork 6a (see FIG. 15). In this case, conventionally the box was fixed to the formwork by gluing it with tape. On the other hand, in the construction tool according to the present invention, the construction tool is placed in the box 10 as shown in FIG.
Attach it to the back of the support rod 71 and attach it to the support rod 5.
By tying the box 10 with the wire 7, the support rod 71 has a tensile strength capable of pressing the box 10 against the formwork 6a, so that the box 10 can be more firmly fixed.

[Brief explanation of drawings]

1 and 2 are a side view and a plan view for explaining the erection tool according to the present invention, and FIG.
Figures 11 to 11 show an example of an installation tool to be attached to a box. Figure 3 is a plan view of the installation tool, Figure 4 is a sectional view of the installation tool, and Figure 5 is a diagram showing the installation tool attached to the box. A perspective view before installation, Figure 6 is a sectional view of the installation tool attached to the box, Figure 7 is a sectional view of the installation structure of the installation tool, and Figure 8 is a lid installed and the installation tool installed in the box. 9 is a perspective view of the structure installed on reinforcing bars, 10 is a side sectional view of the structure in contact with formwork, and 11 is a side sectional view of the structure embedded in a concrete wall. , 1st
Figures 2 to 14 show other examples of the construction tool to be attached to the box, and Figure 12 is a perspective view of the construction tool before it is attached to the box, and Figure 13 is a diagram showing the construction tool being attached to the box using tuft pin screws. Figure 14 is a cross-sectional view of the installation tool being attached to the box using bolts and nuts, Figure 15 is a side cross-section of the box buried in a concrete wall using plastic formwork. Figure, 1st
FIG. 6 is a side sectional view showing the box in close contact with the formwork using stud bolts, and FIG. 17 is a side sectional view showing a conventional construction method for fixing the box between the formworks. In the figure, 1, 11, and 71 are support rods, 2, 12 are mounting bodies, 4, 10 are boxes, 5 is a reinforcing bar, and 6 is a formwork.

Claims (1)

[Scope of Claims] 1. An erection tool for fixing a box installed between formworks in a state where the box is pressed against the formwork before concrete is poured, which can be bent by hand; A linear support rod that has the tensile strength to press the box against the formwork from the back side of the box in a bent state and is fixed to the reinforcing steel that forms the support frame of the concrete wall, and this linear support rod. and a plate-shaped mounting body that holds the box and is attached to the back of the box.