JPH0711207Y2 - Embedded anchor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an embedded anchor used for fixing various units to a reinforced concrete slab.

[Conventional technology]

Pipes, wiring, etc., which are pulled up from below to the roof of a building having a flat roof, are pulled out through the slab opening, but in the above-mentioned opening, it is a common pigeon house constructed integrally with the slab. A box-shaped unit referred to as a box-shaped unit is provided, which penetrates the side portion in a watertight manner, has a good appearance, and is drawn out to the rooftop so that rainwater or the like does not enter.

The above-mentioned unit is usually constructed as follows in order to be integrated with the reinforced concrete slab. That is,
As shown in FIGS. 6 and 7, in the anchor hole 2 provided in the base edge portion of the unit 1 whose example is shown in FIG. Is inserted and locked by the upper nut 4, and the lower end is inserted into a hole formed at a predetermined position of the lower formwork 6 for placing the concrete slab 5 on which the reinforcing bars 5a are arranged. Then, the lower surface of the unit 1 and the upper surface of the lower mold 6 are locked by a lower nut 7 so as to have a predetermined gap therebetween, and a side mold 9 forming a slab opening 8 is attached. Then, concrete is poured to a predetermined thickness (usually 120 to 200 mm). After the concrete is solidified, the molds 6 and 9 are removed to obtain the unit 1 integrally formed with the slab 5 as shown in FIG. At this time, the lower end of the embedded anchor A is slab 5
Since it protrudes from the lower surface of, it is cut and removed by fusing or the like.

[Problems to be solved by the invention]

However, the conventional embedded anchor A has drawbacks such that the cut surface is exposed on the lower surface of the slab 5 to impair the appearance and further cause rust.

In view of the above circumstances, the present invention can adjust the distance between the upper surface of the lower mold and the lower surface of the unit according to the thickness of the slab, and
An object of the present invention is to provide an embedded anchor that is not exposed on the lower surface of the slab after the slab is formed.

[Means for solving problems]

The present invention has been made to achieve the above-mentioned object, and its gist is an embedded anchor for fixing various units to a reinforced concrete slab. A rod-shaped body having a branch portion projecting in, and screwed to an upper screw of the rod-shaped body inserted into an anchor hole formed in a base edge portion of the various units,
A nut for clamping and fixing the base edges of the various units, and a female screw that can be screwed into the lower screw of the rod-shaped body is formed on the inner periphery, and is formed on the outer periphery on the outer periphery, so that it is in the opposite direction to the screw. While having a cylindrical connecting member in which a male screw is formed and an internal thread that can be screwed into the male screw of the connecting member on the inner periphery, the bottom surface is fixed to the upper surface of the lower mold, and the diameter is
It is characterized by having a cylindrical fixing member that does not become smaller in the downward direction.

[Action]

Since the embedded anchor according to the present invention has the above-mentioned configuration, the unit is fixed to the rod-shaped body, and further, the fixing member is fixed to the lower mold, so that the connecting member is supported in the state where the unit is supported by the lower mold. When is rotated, the unit is moved in the vertical direction, and the space between the unit and the lower mold is adjusted.

Specifically, when the connecting member is screwed into the lower screw of the rod-shaped body,
The male screw of the connecting member is also screwed into the female screw of the fixing member to narrow the gap between the lower surface of the unit and the upper surface of the lower formwork. Conversely, loosen the screwing of the connecting member into the lower screw of the rod-shaped body. Also, the screwing of the male screw of the connecting member into the female screw of the fixing member is loosened, and the gap between the lower surface of the unit and the upper surface of the lower mold is widened.

Then, after adjusting the distance between the lower surface of these units and the upper surface of the lower formwork according to the thickness of the slab to be built, concrete is poured, and after lowering the lower formwork after solidifying these, the lower surface of the slab will be The lower surface of the fixing member is exposed. And
When the fixing member exposed on the lower surface of the slab is rotated, the rod-shaped body does not rotate because the anchor effect of the laterally projecting branch in the concrete is increased, and only the fixing member is removed from the slab.

Then, if the portion from which the fixing member is removed is filled with concrete mortar, the lower part of the embedded anchor is embedded in the slab.

〔Example〕

FIG. 1 (a) and FIG. 2 are a side view and a vertical sectional view showing an embodiment of the embedded anchor according to the present invention.
Reference numeral 11 is a rod-shaped body in which upper and lower screws 11a and 11b are cut at both upper and lower ends, respectively. A nut 12 for locking the upper screw 11a to the unit is screwed to the upper screw 11a, and a lower screw 11b.
A connection member 13 is screwed onto the. A portion having a predetermined length from the lower end of the connecting member 13 has a cylindrical shape having a common central axis line with the central axis line 14 of the rod-shaped body 11, and the outer circumference of the cylindrical portion is different from the lower screw 11b. Screw 13a in the opposite direction is cut. The fixing member 15 is screwed to the screw 13a.
It is screwed by 15a. The surface of the fixing member 15 cut by a plane perpendicular to the central axis 14 is a circle having the central axis 14 as the central axis, and its diameter is
The shape does not decrease downward from the upper end. Further, a flange 15b is provided at the lower end portion, the lower surface 15c is a plane perpendicular to the central axis 14, and the flange 15b is provided with a nail hole 15d. Further, as shown in FIG. 1 (b), the lower surface 15c is provided with a hole 15e for rotation, and is rotated by the handle rotating member 16 shown in FIG. 1 (c).

Further, 11c is a branch portion provided in the middle portion of the rod-shaped body 11 so as to project in the lateral direction, and the rod-shaped body having this has a high anchoring effect when embedded in a slab and rotates even when receiving rotational torque. Never.

FIGS. 3 and 4 are explanatory views of a method of mounting the unit 1 using the embedded anchor B configured as described above, and the same parts as those in FIGS. 7 and 8 are designated by the same reference numerals. The description is omitted.

First, the upper end of the rod-shaped body 11 is attached to the unit 1 by the nut 12.
It is fixed to the anchor hole 2 of. The unit 1 to which the embedded anchor B is fixed is placed on the upper surface of the lower formwork 6, and the connection member 13 and the fixing member 15 are rotated to adjust the height of the embedded anchor to set the position of the lower surface of the unit. The fixing member 15 is fixed to the lower formwork 6 with nails 17 according to the height of the slab 5. Also, the side mold 9 is attached if necessary. Next, cast cement mortar to a specified thickness,
After solidifying, remove the molds 6 and 9. The lower surface 15c of the fixing member 15 is
The slab 5 thus formed is exposed on the lower surface. The handle rotating member 16 is inserted into the rotation hole 15e of the lower surface 15c, and the fixing member 15 is rotated so as to descend downward. At this time, since the fixing member 15 has the same central axis as the rod-shaped body 11 and the horizontal cross section is a circle having a diameter that does not decrease downward, the fixing member 15 is rotated without being disturbed by the solidified slab 5, It is removed from the connecting member 13. Also, since the screw 13a is opposite to the lower screw 11b, the connecting member 13
The connection member does not rotate together even when rotated with respect to. After the fixing member is removed in this way,
Holes 18 are formed. By filling the holes 18 with the filling mortar 19, the lower part of the embedded anchor is completely embedded in the slab 5.

In the above description, the fixing member 15 is removed using the rotation hole 15e and the handle turning wheel 16, but another method may be used as long as the fixing member can be rotated. Further, although the lower screw 11b and the screw 13a are reversed, they may be screws in the same direction if there is no co-rotation of the rod-shaped body and the connecting member. Furthermore, the length of the threaded part of the upper screw 11a should be long enough to lock the unit, but the lower screw
11b needs a margin to adjust the height, and it is preferable that it be somewhat long. Further, the branch portion can be provided on the connecting member.

[Effect of device]

As described above, according to the embedded anchor of the present invention,
It has the following excellent effects.

(A) By fixing the unit to the rod-shaped body and further fixing the fixing member to the lower mold, by rotating the connecting member while the unit is supported by the lower mold, the unit can be extremely easily Can be moved in the vertical direction to adjust the distance between the lower surface of the unit and the upper surface of the lower mold according to the thickness of the slab to be constructed.

(B) Since the rod-shaped body is formed with laterally protruding branches embedded in the concrete slab, the anchor effect of the rod-shaped body is enhanced, it does not rotate even if it receives rotational torque, and it is in the axial direction. There is no risk of falling out of the concrete slab even if it receives a shock.

(C) If the fixing member screwed to the lower end of the rod is removed from the concrete slab and the removed part is filled with concrete mortar, the lower part of the embedded anchor is embedded in the slab, so It does not spoil the appearance.

[Brief description of drawings]

1 (a) (b) (c) and FIG. 2 are views showing an embodiment of the implantable anchor according to the present invention, and FIG. 1 (a)
Is a side view, FIG. 1 (b) is a view taken along the line I-I of FIG. 1 (a), FIG. 1 (c) is a side view of the handle rotating, and FIG. 2 is FIG. 1 (a). FIG. 3 is a vertical sectional view showing a method of integrally fixing the unit to the upper surface of the slab using the embedded anchor, and FIG. 4 is a method of completely burying the lower part of the embedded anchor in the slab. FIG. 5 is a vertical cross-sectional view, FIG. 5 is a perspective view showing an example of the unit, and FIGS. 6 to 8 are vertical cross-sectional views for explaining a method of mounting the unit using a conventional embedded anchor. FIG. 7 is a view showing a state in which the unit is fixed to the slab, FIG. 7 is a partially enlarged view of FIG. 6, and FIG. 8 is a view showing a state in which the form is removed. 1 ... Unit, 2 ... Anchor hole, 5 ... Concrete slab (slab), 6 ... Lower formwork, 11 ... Bar, 11
a …… upper screw, 11b …… lower screw, 11c …… branch part, 12 …… nut, 13 …… connection member, 13a …… screw, 14 …… center axis, 15 …… fixing member, 15a …… screw , 15b …… Tsuba, 15c…
… Bottom surface, 15d …… Nail hole, 15e …… Rotation hole, 17 …… Nail, 18 …… Void hole, 19 …… Filling mortar, A …… Conventional embedded anchor, B, B ′ …… Embedded anchor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takeshi Onoda 5-1 Okawa-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Showa Denko K.K. Chemicals Laboratory (72) Naoki Suzuki 5-Okawa-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa 1 Chemicals Laboratory, Showa Denko KK (72) Shigeru Adachi 2-10-12 Shibadaimon, Minato-ku, Tokyo Within Showa Denko KK (72) Yoshihiko Abiko 1836-86-1 Yamaguchi, Tokorozawa, Saitama Prefecture -407 (56) References Actual public 46-19210 (JP, Y1) Actual public 45-23064 (JP, Y1) Actual public 53-39832 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. An embedded anchor for fixing various units to a reinforced concrete slab, wherein a rod-shaped member having upper and lower end portions each having a thread and a branch portion projecting laterally in an intermediate portion thereof; A nut that is screwed into the upper screw of the rod-shaped body that is inserted into the anchor hole formed in the base-edge portion and that clamps and fixes the base-edge portion of the various units, and the lower screw of the rod-shaped body on the inner circumference. A cylindrical connecting member having a female thread that can be screwed and an external thread formed on the outer circumference in the opposite direction to the external thread, and an internal thread that is screwed to the external thread of the connecting member. An embedded anchor comprising a cylindrical fixing member having a female thread capable of being fixed, a bottom surface fixed to an upper surface of a lower mold, and a diameter which does not decrease downward.