JPS6316773Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a nailing part for nailing and fixing a concrete embedding member, such as a conduit end protector, buried in a concrete wall to a temporary concrete frame.

(Prior Art) Taking conduit end protectors as an example, conventional conduit end protectors buried in concrete walls are fixed by nailing to a temporary concrete frame to prevent them from shifting from a predetermined position. Ru. The temporary concrete frame will be removed after the concrete has been poured and cured, but the fixing nails will remain with their tips protruding from the concrete wall. For this reason, in the past, the tip of the protruding nail was bent with pliers or cut with nippers. However, because the nail heads of the nails remain inside the concrete wall, the nails often become rusty over time, and this rust often appears as stains on the ceiling wall surface. For this reason, the nails used to secure the conduit end protector to the temporary concrete frame are
It is desirable to completely remove the concrete after it has been poured and cured.

(Purpose) The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a structure of a nailing part that can easily remove the nails of a member for concrete embedding that is nailed and fixed to a temporary concrete frame. It is an object.

(Structure) The structure of the nailing part of the concrete embedding member that is nailed and fixed to the concrete temporary frame in the present invention is to lock the inserted nail head and to attach the nail head along the axial direction to the nail shaft. It is characterized by comprising a support part that supports approximately half the circumference of the nail, and a nail extraction part along the axial direction of the nail shaft through which the nail head and the nail shaft can pass, on the opposite side of the support part.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view thereof, and FIG. 3 is a perspective view from the back.

In the figure, 5 is a support part, and the nail head 2 of the nail 1 inserted into the insertion hole 4 is locked at the upper end 5a of the support part. Also, the nail shaft 3 is connected to the support portion 5
It is designed to be supported on the inner side 5b of. The portion where the nail shaft 3 is supported by this inner side 5b extends approximately half the circumference of the nail shaft 3. Regarding approximately half the circumference, the nail shaft 3 is not particularly limited to the half circumference, and the nail shaft 3 can be moved in the horizontal direction (the axial direction is the vertical direction),
This means that any structure that is sufficient to support the nail shaft 3 with the nail 1 inserted therethrough is sufficient.

Reference numeral 7 denotes a nail extraction portion formed on the wall surface 6 of the concrete embedding member, and is located on the opposite side of the support portion 5. The upper part of the nail extraction part 7 is expanded so that the nail head 2 can pass therethrough, and the lower part is a groove through which the nail shaft 3 can pass.

In this way, the nailing part in the present invention is
The structure includes a support part 5 and a nail extraction part 7,
The support part 5 has a structure that locks the nail head 2 of the inserted nail 1 at the upper end 5a of the support part and supports the nail shaft 3, and the nail extraction part 7 has a structure that allows the nail head 2 and the nail shaft 3 to pass through. It is becoming.

Next, an example of use of the present invention will be explained.

The inserted nail 1 is in the state shown in FIG. 4, that is, the tip end 3a of the nail shaft 3 is driven into the concrete temporary frame 15, so that the concrete embedding member 9 is inserted into the concrete temporary frame 15. Fixed. When pouring concrete in such a state and removing the temporary concrete frame 15 and removing the nails 1 after pouring and curing, the nail shafts 3 protruding from the concrete wall surface 16 as shown in FIG.
If you pinch the tip 3a with pliers or hit it with a hammer or the like to move it in the direction of arrow 8,
The nail head 2 and the nail shaft 3 pass through the nail extraction part 7 to the support part 5.
Then, by pulling the tip 3a of the nail shaft 3 downward, it can be removed from the concrete embedding member 9.

6 and 7 show another embodiment of the present invention, in which a small protrusion 5c is formed on the inner side 5b of the support portion 5 to prevent nails from being pulled out. Therefore, the fixation of the nail shaft 3 to the support portion 5 is improved. When removing the nail 1, the tip 3a of the nail shaft 3 is moved in the same manner as described in FIG. The nail 1 can be easily removed from the support part 5 and removed from the support part 5.

Figure 8 shows a structure in which a thin film burr 14 is formed on the nail extraction part 7, and A shows the nail head 2.
A thin burr 14 is formed on the upper part of the nail extraction part 7 through which the nail extraction part 7 passes. If the thin burr 14 is formed in this manner, it is possible to prevent concrete from penetrating into the concrete embedding member 9 through the nail extraction part 7 during concrete pouring. Further, since the burr 14 is thin, it can be easily broken when removing a nail.

Figures 9 to 12 show examples in which the present invention is applied to various concrete embedding members.
The figure shows an example applied to a conduit end protector 10 used to protect the end of a buried conduit, FIG. 10 shows an example applied to a buried wiring box 11, and FIG. 11 shows a conduit installed in a partition wall. Fig. 12 shows an example in which the present invention is applied to a temporary frame bushing 12 used for lowering, raising, and penetrating beams, etc., and Fig. 12 shows an example in which the present invention is applied to an insert used for fixing hanging bolts.

(Effects) As described above, according to the present invention, after concrete pouring and curing, concrete embedding members that remain protruding from the concrete wall surface can be easily removed without leaving behind the nails used to fix them to the concrete temporary frame. This eliminates the need to bend the nails with pliers or cut them off with a nipper as in the conventional method, and since no nails are left inside the concrete wall, there is no need to worry about stains on the wall surface due to nail rust.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, with FIG. 1 being a perspective view thereof, FIG. 2 being a partially cutaway perspective view thereof, FIG. 3 being a perspective view from behind, and FIGS. Fig. 5 is a sectional view showing the state of use of the present invention;
7 and 7 show another embodiment of the invention,
FIG. 6 is a perspective view of the same, FIG. 7 is a perspective view from behind, FIG. , are examples in which the present invention is applied to various concrete buried members, FIG. 9 is a perspective view of an example applied to a conduit end protector, FIG. 10 is a perspective view of an example applied to a wiring box, and FIG. The figure is a perspective view of an example applied to a temporary frame bushing, and FIG. 12 is a perspective view of an example applied to an insert. In the figure, 1 is a nail, 2 is a nail head, 3 is a nail shaft, 5 is a support part, and 7 is a nail extraction part.

Claims (1)

[Scope of utility model registration request] A support part that locks the inserted nail head and supports the nail shaft along the axial direction, and a nail puller along the axial direction of the nail shaft through which the nail head and nail shaft can pass on the opposite side of the support part. A structure of a nailing part of a concrete burial member nailed to a temporary concrete frame.