JPH0329951Y2 - - Google Patents

Description

[Detailed explanation of the invention] Boxes such as outlet boxes and switch boxes for electrical wiring are generally buried in the concrete walls of buildings, but in this case, the boxes are installed in the space of opposing temporary concrete frames. This is done by pouring ready-mixed concrete into the space.

By the way, recently, the present inventor has installed an auxiliary rod so as to protrude from the side wall of the box as a means of attaching the box to the concrete temporary frame, and attached the end of this auxiliary rod to the reinforcing bar that is the supporting frame of the concrete wall. We developed a method to bridge the box with reinforcing steel and then place a temporary concrete frame in close contact with the front opening of the box. According to this method, the box is attached via an auxiliary rod, so even when connecting a metal conduit or, for example, a flexible conduit to the box, the influence of the flexibility of the conduit can be affected. This has the advantage that the box can be reliably attached to the concrete temporary frame without being subject to damage.

This invention was developed as part of this development, and its purpose was to allow a separate auxiliary rod to be easily attached to the back wall of the box without making any special improvements to the back wall of the box, and to allow the box to be mounted on concrete. To provide a box erecting tool which can surely be brought into close contact with a temporary frame.

Therefore, in the above method developed by the present inventor, the box is surely brought into close contact with the temporary concrete frame so that the fluid ready-mixed concrete does not enter the box through the gap between the box and the temporary concrete frame. There is a need. For this reason, it may be possible to use a commonly used metal fitting 31 with a U-shaped cross section as shown in FIG. 9A, but in this case, the
As shown in FIG. As shown in Figure B, the rear wall must be bulged to form a screw hole 33 therein, and the male thread of the stud bolt 16 must be similarly screwed in and pulled together to bring them into close contact. Therefore, the existing conventional box cannot be used, and it is necessary to make special improvements such as the nut 32 and the screw hole 33 on the back wall of the box.
Making such improvements to the box is very tedious. As mentioned above, the present invention is a box installation tool that allows a separate auxiliary rod to be easily attached to the back wall of the box without making such special improvements to the box, and allows the box to be brought into close contact with the temporary concrete frame. The purpose is to provide Therefore, the greatest feature of the box installation tool according to the present invention is that it has a screw hole (○) and a recess (○). Since a screw hole is provided, by inserting a screw into the hole, the box can be reliably brought into close contact with the temporary concrete frame. Also, since the recess is provided, the auxiliary rod can be easily attached to the back wall of the box.

In FIG. 1, reference numeral 1 denotes a box construction tool according to the present invention, which is used when a box 7 is bridged to a reinforcing bar 10 that is a supporting frame of a concrete wall. This is for bringing the box into close contact with the temporary concrete frame, is made of synthetic resin, and is provided with a screw hole 2 and a recess 3. The screw hole 2 faces the back wall of the box 7 and is in a penetrating state. In this example, the box installation tool 1 has a small hole 9 on the front surface. Reference numeral 6 denotes a separate auxiliary rod, which bridges the box to the reinforcing bar, and may use the reinforcing bar itself, or may use a round bar or a square bar. The recess 3 is for fitting the auxiliary rod 6 so as to protrude from the side wall of the box, and is preferably formed in the shape of a groove as in the example shown in FIG.
Further, it is desirable that the recesses 3 are formed above and below the screw hole 2 so as to extend from side to side, as in the present example shown in FIG. Further, it is preferable that two types of recesses 3 are formed adjacently, one having a large width and one having a small width, as in the present example shown in the drawings. By making the widths of the recesses 3 different in this way, it is possible to correspond to the diameter of the auxiliary rod 6. Note that the number, position, size, etc. of the recesses 3 are not limited to the present example shown in the drawings.
For example, they may be provided only above or below the screw hole 2, or one may be provided above and one below, and other modifications may be made as appropriate.

In the case of the example shown in FIG. 3, the sealing tool 4 having a male screw 14 screwed into the screw hole 2 of the box installation tool 1 has a rod shape as a whole, and the folding groove 13 is folded with a bench or the like as shown in FIG. The length can be adjusted by cutting the concrete wall to accommodate differences in concrete wall thickness.

When attaching the auxiliary rod 6 to the back wall of the box 7, as shown in FIG. 1 to the back wall of Box 7. In this example, this is accomplished by passing a screw 8 through the back wall of the box 7 and screwing this screw 8 into a small hole 9. In this state, as shown in FIG.
It is clamped and fixed between the back wall of the If a portion of the auxiliary rod 6 is slightly protruded from the recess 3, the auxiliary rod 6 can be more firmly clamped and fixed. At this time, it is desirable to screw the male screw 14 of the close fitting 4 into the screw hole 2 of the box installation tool 1 from the side opposite to the rear wall of the box 7.

Once the auxiliary rod 6 has been attached to the back wall of the box 7 as described above, the box 7 is bridged to the reinforcing bar 10 using a wire 18 or the like via the auxiliary rod 6 as shown in FIGS. 6 and 7. . Thereafter, as shown in FIG. 5, the other temporary concrete frame 12 is fixed to the opening side of the box 7. In this state, the screw hole 2 has a close fitting 4.
Since the male screw 14 of the box 7 is screwed in, the close fitting 4 plays the role of a tension rod between one temporary concrete frame 11 and the box 7, and connects the opening side of the box 7 to the other temporary concrete frame 12. can be ensured in close contact with the In the example shown in FIG. 5, the close fitting 4 having the male thread 14 is screwed into the box 7 from the side opposite to the back wall, but instead of this, as in the example shown in FIG. Screw the stud bolt 16 with the male thread 16a passed through it into the screw hole 2 of the box installation tool 1 from inside the box 7, turn the nut 17 screwed into the stud bolt 16, and remove the other temporary concrete frame 12. It is also possible to use a structure in which the box 7 is brought into close contact with the other temporary concrete frame 12 by drawing the box 7 toward the other temporary concrete frame 12. In addition, screw hole 2
It is not necessary to penetrate through the box 7, and it is sufficient to open only toward either the back wall of the box 7 or the side opposite to the back wall. In this case, insert the male screw from only one side.

As described in detail above, the configuration of the present invention is to bridge the box to the reinforcing bars that are the supports of the concrete wall, and to attach the box to the back wall of the box in order to closely fix the box to the temporary concrete frame. A screw hole facing the back wall and into which a male screw for bringing the box into close contact is screwed through the back wall or into which the male screw is screwed from the opposite side of the back wall, and a recess into which the auxiliary rod is fitted so as to protrude from the side wall of the box. This is a box installation tool comprising the following. When such a box installation tool is used, a stud bolt 16 having a thread as shown in the figure is used.
Alternatively, by screwing the sealing tool 4 with a male thread into the screw hole of the box installation tool, special improvements such as fixing the nut 32 and forming the screw hole 33 described above can be made without making any special improvements to the back wall of the box. This has the effect that a separate auxiliary rod can be easily attached to the back wall of the box.

[Brief explanation of drawings]

Figures 1 to 8 show examples in which the present invention is specifically applied. Figure 1 is a perspective view before the box installation tool is attached to the box, and Figure 2 is a close-fitting tool attached to the box installation tool attached to the box. A perspective view before installing the
Figure 3 is an enlarged perspective view of a typical closing tool, Figure 4 is a perspective view of the closing tool being folded, and Figure 5 is a state in which the box is installed on a reinforcing bar via an auxiliary rod and a box installation tool. , Figures 6 and 7 are perspective views from different directions of the box installed on the reinforcing bars via the auxiliary rod and box installation tool, and Figure 8 is a side view of the box when stud bolts are used. This is a diagram equivalent to Figure 5. FIGS. 9A and 9B are side views showing a conventional box mounting method. 1 is a box erection tool, 2 is a screw hole, 3 is a recess, 4 is a close fitting, 16 is a stud bolt, and 11 and 12 are one and the other temporary concrete frames.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) The box is attached to the back wall of the box in order to bridge the box to the reinforcing bars that are the supports of the concrete wall, and to closely fix the box to the temporary concrete frame. ) A screw hole facing the back wall of the box and into which a separate male screw for closely fixing the box to the concrete temporary frame is inserted through the back wall, or into which the male screw is screwed from the side opposite to the back wall; A box installation tool comprising a recess opening on the back wall side of the box so that the auxiliary rod of the body is clamped and fixed between the back wall of the box.