JPH019222Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Purpose) The present invention relates to a structure for easily and reliably attaching electrical wiring boxes such as outlet boxes and switch boxes to reinforcing bars that are the supports of concrete walls.

Boxes for electrical wiring, such as outlet boxes and switch boxes, are often buried in the concrete walls of buildings. In this case, it is common practice to install boxes in the space of temporary concrete frames that are set up to face each other, and to pour concrete into the space of the temporary concrete frames in this state. However, the impact when pouring concrete is quite large, so even if a box is installed in a space, there is a problem that the box may shift from its normal position due to the impact when pouring concrete. . In addition, the open end surface of the box, which is in close contact with the temporary concrete frame under normal conditions, separates from the temporary concrete frame due to the above-mentioned impact, and soft fresh concrete flows from the gap between the temporary concrete frame and the open end surface of the box. Problems such as flow and clogging of the inside of the box often occur. As such, the impact during concrete pouring is quite large.

In order to solve the above problem, a jack is dropped into the space of the temporary concrete frame, and the extension of the jack ensures that the box is brought into close contact with the temporary concrete frame.Concrete is then poured in this state, and the box is then jacked. It is also possible to bury it together. However, this is economically disadvantageous because the jacks will also be buried.

The present invention was developed under these circumstances, and its purpose is to reliably support the electrical wiring box when it is buried in a concrete wall, and to provide support during concrete pouring. The purpose is to reliably prevent the box from shifting.

(Structure) The feature of the present invention is that, in order to achieve the above object, a hook part made integrally with the outer wall of the electrical wiring box is hooked onto the reinforcing bar that is the supporting frame of the concrete wall, and in that state, the tip of the screw is attached. The point is that the first means of pressing the reinforcing bar against the inner surface of the hook part is combined with the second means of supporting the box by inserting the external thread of a separate support into the screw hole formed in the back wall of the box. It is in.

That is, the impact applied to electrical wiring boxes during concrete pouring is quite large, but by combining the first means and second means as in the present invention, the boxes can be supported reliably. This makes it possible to prevent the box from shifting as much as possible during concrete pouring.

To further explain the structure of the present invention, reference numeral 1 denotes a box such as an outlet box or a switch box for electrical wiring, which is integrally molded of, for example, resin. Reference numeral 2 denotes a hook part made integrally with the outer wall of the box 1, and this hook part is hooked onto a reinforcing bar 3, which is a supporting frame of a concrete wall, as shown in FIG. In the case of the examples shown in FIGS. 1 to 4, the hook portion 2 is formed by protruding hook-like protrusions on the back wall 1a of the box 1 with a predetermined distance apart and in opposite directions. There is. In the case of the example shown in FIGS. 5 and 6, the hook portion 2 is constructed by protruding ring-shaped projections from both left and right walls of the box 1 at a predetermined distance.

The reinforcing bars 3 form the support frame of the concrete wall, and are placed mainly in the vertical and horizontal directions before concrete placement. 5 is the back wall 1a of box 1
It is a screw hole formed in.

Numeral 7 denotes a screw that is fastened to the periphery of the hook part 2 from inside the box 1, and includes screws, tapping screws, bolts, etc. in addition to commonly used screws.

With the reinforcing bar 3 hooked to the hook part 2, the screw 7 is passed through from inside the box 1, and the screw 7 is screwed in to stop it. Press the reinforcing bar 3 toward the inner surface of the hook part 2 with the tip 7a, and attach the box 1 to the reinforcing bar 3.
The structure is such that it can be installed. In this example, a screw insertion hole 4 is provided between the hook portions 2, and a screw 7 is inserted into the hole. However, instead of this, a tapping screw is used as the screw 7, and the tapping screw is directly screwed into the hole. Also good.

By the way, by turning the screw, the amount of screw advance and retraction can be adjusted continuously and steplessly. Similarly, in the present invention, since the reinforcing bar 3 is pressed by the screw 7 fixed to the periphery of the hook part 2, by turning the screw 7 appropriately, the amount of screw advance and retreat of the screw 7 can be continuously and steplessly adjusted. can. Therefore, even if the diameter of the reinforcing bar 3 is somewhat large or small, by turning the screw 7, the reinforcing bar 3 can be reliably pressed by the screw tip 7a without being affected by the diameter, and the reinforcing bar 3 can be tightened. can be carried out reliably.

Once the box 1 is attached to the reinforcing bar 3 using the hook 2 and the screw 7 as described above, the external thread 10 of the separate support 9 is attached as shown in FIGS. 1 and 2.
The box 1 is supported by screwing it into the screw hole 5. The support 9 in the example shown in FIG. 2 is screwed into the box 1 from the rear wall 1a side, and serves as a tension rod between the temporary concrete frame 11 on one side and the temporary concrete frame 12 on the other side. Then, the open end surface 1b of the box 1 is attached to the other temporary concrete frame 1.
It is closely related to 2. The support 9 has a fold groove 9a that allows the length to be adjusted by cutting.

When screwing a separate support into the screw hole 5, the following configuration may be used. That is, as shown in FIG. 9, after one concrete temporary frame 11 and the other concrete temporary frame 12 are installed side by side, a separate support 13 such as a stud bolt is inserted through a through hole 11a formed in one concrete temporary frame 11. Insert this support 1
3 into the screw hole 5 from the open end surface 1b side of the box 1, and then tighten the nut 15 of this support 13.
may be rotated as appropriate. In the case of the example shown in FIG. 9, by turning the nut 15 of the support 13, the open end surface 1b of the box 1 can be reliably brought into close contact with one of the temporary concrete frames 11.

Figure 8 shows a typical example of forming a floor wall of a concrete wall.
After the box 1 is attached to the reinforcing bars 3 with screws 7, a separate support 9 is screwed into the screw hole 5 of the box 1 to support the box 1.

(Effect) The feature of the present invention is that the hook part 2 made integrally with the electrical wiring box 1 is fitted into the reinforcing bar 3 which is the supporting frame of the concrete wall, and the screw tip 7a is inserted into the reinforcing bar 3.
A first means for pressing the box 1 against the inner surface of the hook part 2, and a second means for supporting the box 1 by screwing separate supports 9 and 13 into the screw hole 5 formed in the back wall of the box 1. This is a point in which the methods of the above are combined. As a result, even if the impact during concrete pouring is quite large, displacement of the box 1 can be reliably prevented.

That is, the impact during concrete pouring is quite large, and the fresh concrete is pushed into box 1 from the open end surface 1b of box 1 due to the impact during pouring.
In the past, problems often occurred due to internal flow. Therefore, the box 1 is connected to the reinforcing bar 3 using the hook part 2 and the screw tip 7a which are manufactured integrally with the box 1.
If the box 1 is simply attached to the box 1, the impact during pouring may cause the box 1 to shift and move, causing soft fresh concrete to flow into the box 1 from the gap between the open end surface 1b of the box 1 and the temporary concrete frame. There are also quite a few. However, according to the present invention, the box 1 is further supported by screwing the male screws 10, 14 of the supports 9, 13 into the screw holes 5 formed in the rear wall 1a of the box 1.
It is possible to prevent the box 1 from shifting as much as possible, and to prevent fresh concrete from flowing into the box 1 as much as possible.

By the way, it has been thought in the past to attach the conduit itself to the reinforcing bar 3, but as in the present invention, the conduit is attached to the box 1 which is hooked to the reinforcing bar 3, which is the supporting frame of the concrete wall, through the hook part. If they are connected, the box 1 will not move even if the conduit is a flexible conduit made of resin or the like. That is, the present invention is particularly suitable for connecting a flexible conduit to the box 1.

[Brief explanation of the drawing]

The drawings are representative examples of the present invention. Figures 1 and 2 are perspective and side views of the box attached to the hook via reinforcing bars, and Figure 3 is a view of the area near the hook. FIG. 4 is an enlarged perspective view and a longitudinal sectional side view thereof. Figures 5 and 6 show different examples of the present invention, with Figure 5 being a sectional view of the vicinity of the hook, and Figure 6 being the
It is a figure equivalent figure. FIG. 7 is a further different example of the present invention, and is a sectional view of the vicinity of the hook. FIG. 8 is a side view of the present invention applied to a concrete floor wall, and FIG. 9 is a view corresponding to FIG. 2 of a different example of the present invention. In the figure, 1 is a box, 2 is a hook, 1a is a back wall, 3 is a reinforcing bar, 5 is a screw hole, 7 is a screw, 9 and 13 are separate supports, and 10 and 14 are male threads.

Claims (1)

[Scope of Claim for Utility Model Registration] (a) A hook part that is made integrally with the outer wall of the box and hooks the reinforcing bars that form the support frame of the concrete wall in an erected state; Stopped at the periphery,
(c) a screw hole formed on the back wall of the box into which a male thread of a separate support is screwed to support the box; A structure in which a box for electrical wiring is installed inside a concrete wall.