JPH0117324B2 - - Google Patents

Description

[Detailed Description of the Invention] The present inventor has recently developed a method for attaching an auxiliary rod to the outer wall of a box such as an outlet box or a switch box, and connecting this auxiliary rod to a reinforcing bar that is the supporting frame of a concrete wall. did. According to this method, not only metal conduits but also flexible conduits made of synthetic resin that are easily bent, for example, are not affected by the flexibility of the flexible conduits. The box can be attached to the concrete temporary frame without any trouble.

The present invention was made as part of such development, and the purpose of the present invention is to provide a method for installing a box onto a temporary concrete frame without being affected by the depth of the box, variations in the thickness of the concrete wall, or other conditions. The purpose of this method is to adjust the box mounting position in the thickness direction of the concrete by rotating an auxiliary rod shaped like this.

A feature of the present invention relating to the method is that when a box is attached to a temporary concrete frame, a crank-shaped auxiliary rod is rotatably fixed to the outer wall of the box so as to protrude from the side wall of the box, and the crank-shaped auxiliary rod is rotated at a predetermined angle. It is constructed by installing it on reinforcing bars in a state where it is movably fixed and positioned.

In other words, the feature of the present invention relating to the method is that the mounting position of the box in the concrete wall thickness direction is adjusted by rotating and fixing a crank-shaped auxiliary rod for positioning.

The invention described in claim 2 is intended for use in carrying out inventions related to methods.

First, for convenience of explanation, an apparatus used to carry out the present invention will be described, and then a method of the present invention will be described. Reference numeral 1 denotes a box installation tool, which is separate from the box 7 and is used when installing the box 7 on the reinforcing bars 10, and has a screw hole 2 and an auxiliary rod 3. In the case of the embodiment shown in the drawings, the insertion hole 2 is in a penetrating state. In the case of the example shown in the drawings, a wide groove 5, a narrow groove 6, and a small hole 8 are formed above and below the screw hole 2, respectively, as shown in FIG. The auxiliary rod 3 has a crank shape, and in particular, in the case of the example shown in FIG. 1, the center portion and both ends are deviated by a predetermined length l. Although the auxiliary rod 3 is separate from the box installation tool 1 in the example shown in the drawings, it may be an integral part. In FIG. 2, reference numeral 12 denotes a tension rod, which has a male threaded portion 13 for bringing the box 7 into close contact with the temporary concrete frame, and also has a fold groove 14.

After completing the description of the apparatus, the present invention relating to the method will be described. First, two crank-shaped auxiliary rods 3, for example, are provided on the outer wall of the box 7 so as to protrude from the side wall of the box 7. In the case of the example shown in the drawings, as shown in FIGS. 1 and 2, the box installation tool 1 is
With the center part of the auxiliary rod 3 fitted into the groove 6,
A screw 9 is inserted into the small hole 8 through the outer wall of the box 7, thereby providing the auxiliary rod 3 on the outer wall of the box 7.

Thereafter, as shown in FIGS. 3 and 4, the crank-shaped auxiliary rod 3 is rotated and positioned at a predetermined angle, and the auxiliary rod 3 is installed on the reinforcing bar 10.
In the case of the example shown in the drawings, the construction is carried out by binding both ends of the crank-shaped auxiliary rod 3 to the reinforcing bars 10 with wire or the like.

In this example, after the auxiliary rods 3 are installed on the reinforcing bars 10, the other temporary concrete frame 16 is erected and fixed parallel to one temporary concrete frame 15.

When installing the auxiliary bar 3 on the reinforcing bar 10, the fourth
As shown in the figure, it is desirable to screw the male threaded portion 13 of the tension rod 12 into the screw hole 2 of the box installation tool 1 in advance. By screwing the threaded portion 13 into the screw hole 2 in this manner, the opening surface of the box 7 can be reliably brought into close contact with the temporary concrete frame 16 by the action of the tension rod 12. In addition, as shown in FIG.
A structure may also be adopted in which the opening surface of the box 7 is brought into close contact with the temporary concrete frame 16 by screwing the male threaded portion 18 of the box 7 into the screw hole 2 of the box installation tool 1.

Reference numeral 20 denotes a conduit through which the electric wire is inserted, and includes a conduit made of metal as well as a flexible conduit made of synthetic resin, and it does not matter whether it is a flexible tube or a non-flexible tube. Here, in the case of a flexible tube, the box becomes unstable because it does not stand upright by itself, but the present invention, which erects the box via auxiliary rods, allows the box to be stably attached to the temporary concrete frame.

By the way, BOX 7 has shallow type and deep type.
The depth dimension H (see Figure 4) of this is, for example, 44 mm.
In addition, a box cover may be installed on the opening side of box 7, and the concrete wall thickness is also specified as 120 mm, 150 mm, etc. Therefore, it is necessary to position the box 7 to accommodate variations in the depth dimension H of the box 7, the presence or absence of a box cover, and variations in the thickness of the concrete wall. In this regard, according to the present invention, since the crank-shaped auxiliary rod 3 is rotated to perform positioning at a predetermined angle, such fluctuations can be reliably absorbed. That is, by appropriately setting the inclination angle α (see Fig. 4) of the auxiliary rod 3 between 0 and 180 degrees, the mounting position of the box 7 in the thickness direction of the concrete wall can be adjusted, and the above fluctuation can be reliably corrected. Can be absorbed.

FIG. 5 shows an example in which a box cover 11 is used, and it is necessary to move the box 7 back by the thickness t of the box cover 11. Therefore, the fifth
As shown in the figure, the crank-shaped auxiliary rod 3 is tilted at an angle α=
Positioning is performed with the position set to 0, and the box 7 is moved backward.

Alternatively, as shown in FIG. 6, the entire crank-shaped auxiliary rod 3 may be tilted so as to protrude forward.

As explained above, in the present invention, when attaching a box to a temporary concrete frame, a crank-shaped auxiliary rod is rotatably fixed to the outer wall of the box so as to protrude from the side wall of the box, and the crank-shaped auxiliary rod 3 The structure is such that the box 7 is rotated and positioned at a predetermined angle before being installed on the reinforcing bars 10. With this structure, the box 7 can be mounted on the concrete wall regardless of box depth, concrete wall thickness, and other conditions. The thickness can be adjusted very easily in the thickness direction.

FIGS. 8 and 9 show a different embodiment of the present invention, and in this example, an auxiliary rod is attached to the vertical outer wall of the box via a fixture 41. 10 and 11 show different embodiments of the present invention. In this example, a cut-and-raised piece 42 is formed on the bottom wall of the outer wall of the box, and a crank-shaped piece is formed on this cut-and-raised piece 42. With the auxiliary rod fitted, cut and raise the piece 42
The auxiliary rod is attached by caulking the open end of the Note that the auxiliary rod attachment position is not limited to these, and can be changed as appropriate.

[Brief explanation of drawings]

The drawings show typical examples of the present invention; Figure 1 is a perspective view before the auxiliary rod is attached to the box, and Figure 2 is a perspective view before the tension rod is screwed into the box with the auxiliary rod attached. Figures 3 and 4 are a perspective view and a side view of the auxiliary rod installed on a reinforcing bar at a predetermined angle, and Figures 5 and 6 are side views showing different modes of use. FIG. 7 is a side view of the box brought into close contact with the stud bolt. 8 and 9 show different embodiments, FIG. 8 being a perspective view of the entire auxiliary rod attached to the box, and FIG. 9 being a sectional view of the fixture. 10 and 11 show different embodiments of the present invention, FIG. 10 is an overall perspective view, and FIG.
Figure 1 is a sectional view of the cut and raised piece. In the figure, 1 is a box installation tool, 2 is a screw hole, 3 is an auxiliary rod, 12 is a tension rod, 17 is a stud bolt, 1
3 and 18 indicate external threads.

Claims (1)

[Claims] 1. A box mounting method that allows the box mounting position to be adjusted in the thickness direction of a concrete wall, comprising:
A crank-shaped auxiliary rod is rotatably fixed on the outer wall of the box so as to protrude from the side wall of the box, and the crank-shaped auxiliary rod is rotated and positioned at a predetermined angle, and then installed on the reinforcing bars. A method for attaching boxes to a temporary concrete frame, characterized by: 2 It is separate from the box and is attached to the outer wall of the box in order to erect the box to the reinforcing steel, and has a screw hole into which the male thread is inserted to bring the box into close contact with the temporary concrete frame, and a rotationally fixed part. A box installation tool comprising a freely adjustable crank-shaped auxiliary rod.