JP2014148832A - Sash anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sash anchor that is more simply configured than a conventional sash anchor to enable a weld part for fixation of an aluminum sash frame, a steel door frame and the like of a building to be easily embedded in concrete.SOLUTION: A protrusion 3 with a pointed top is provided at an inner end 4 of a body of a round steel bar 2. The inner end 4 of the body is inserted into a bearing hole 12 for a body of a cover 11. An outer end 5 of the body is applied to a form 21 and beaten with a hammer 23, and fixed to the form 21. Subsequently, the form 21 is removed through the placing of the concrete 22, and the cover 11 is simultaneously detached from the concrete 22.

Description

The present invention relates to a sash anchor that is used to fix an aluminum sash frame, a steel door frame, or the like of a building and is embedded in concrete in advance.

The conventional sash anchors currently in circulation have a buried part in concrete with one end of round steel bent in a crank shape, and a welded part that is not buried in the concrete that welds the connecting reinforcing bar at the other end. A thin steel plate cover is fixed to the welded part by welding, and the cover part is fixed to the inner surface of the formwork with a nail and embedded in concrete (patent) Reference 1).

The conventional sash anchors currently on the market will be welded with a concrete drill if the rounded surface is removed from the concrete surface after the mold is removed and there is no weld at the planned position. Post-processing is required to install the anchor.
If the sash anchor fixed to the formwork with a nail is tilted due to the looseness of the nail and the welded part is not normally exposed on the concrete surface after mold removal, cover the welded part with a chisel and hammer. Post-treatment is necessary to remove the concrete.

There are many cases where the cover end of the thin steel slab cover of the conventional sash anchor currently in circulation is extremely reduced in the cover thickness of the concrete. Will cause rust.

The nail used to attach the conventional sash anchor to the formwork is not attached to the sash anchor, so it is necessary to prepare it separately, and the operation of the worker when attaching to the formwork The above two operations are necessary, that is, the operation of placing the sash anchor on the formwork and the operation of transporting the nail to the upper portion of the sash anchor, and the work efficiency is poor. Furthermore, the nail is about 50 mm long, but since the nail is long, the number of hits with a hammer until completion of driving is large, and the work efficiency is poor.

The conventional nail used for attaching the conventional sash anchor to the formwork is a nail having a length of about 50 mm mainly used for formwork. Although it is possible to fix the sash anchor to the formwork even with a little shorter nail, in addition to being hard to hit the short nail, increasing the length of the nail makes it cumbersome and dislikes that the work efficiency is lowered. A nail of about 50 mm is used. Since it is a long nail, the tip of the nail protrudes long outside the mold during the presence of the mold, which is dangerous for workers.

The above-mentioned conventional sash anchors that are currently in circulation have completed sash installation when the tip of the nail protrudes from the concrete surface for a long time because the head of the nail is often buried in the concrete after mold removal. This is dangerous for workers until

There is also disclosed a technique in which round steel, which is a welded portion of a sash anchor, is fitted to a cover formed into a dome shape, and the cover is fixed to a mold with screws. (See Patent Document 2).
In the conventional sash anchor disclosed in the above technology, when a strong force is applied to the round steel part before the concrete is placed on the formwork, the round steel part may come off from the dome part. If the round steel is removed from the concrete surface after the mold and the tip of the round steel, which is the welded part, does not exist at the planned position, a post-treatment is required to make a hole with a concrete drill at that position and attach the welding anchor. .

The conventional sash anchor disclosed in the above technology has a weak attachment strength to the mold when the number of screws for fixing the dome-shaped cover to the mold is one in the periphery of the dome. When there are a plurality of screws in the periphery of the dome, there is almost no possibility that the cover will come off, but the work for attaching to the mold is troublesome and the work efficiency is poor.

The conventional technique has the above-described drawbacks.

Japanese Utility Model Publication No. 2-18234 JP 2006-28732 A

For fixing the aluminum sash frame, steel door frame, etc. of the building by using a simpler structure than the conventional sash anchor shown in Reference 1 and the conventional sash anchor disclosed in Reference 2. A sash anchor that can easily embed a welded portion in concrete and that is inexpensive is provided.

In the conventional sash anchor shown in Literature 1, when a strong force is applied to the body portion of the sash anchor before placing the concrete on the formwork, the body portion of the sash anchor may come off from the thin steel plate cover portion. If the body part of the sash anchor is removed from the concrete surface after the mold is removed and the welded part of the sash anchor does not exist at the planned position, a hole is drilled with a concrete drill at that position and the weld anchor is attached. There is a case where post-processing is required for attachment, but a sash anchor that does not require this work is provided.

In the conventional sash anchor shown in Document 1, the sash anchor fixed to the formwork with a nail is tilted due to loosening of the nail or incomplete nailing, and the welded part is normal on the concrete surface after the formwork is removed. If not exposed, a post-treatment may be necessary to remove the concrete covering the weld using a chisel and a hammer, but a sash anchor that does not require this work is provided.

In the conventional sash anchor shown in Document 1, the cover end made of a thin steel plate is often found to have an extremely small concrete cover thickness. The sash anchor is provided with very little concern.

The conventional sash anchor shown in Document 1 does not come with a nail used to attach to the formwork, so it is necessary to prepare separately and the operation of the worker when attaching to the formwork is The above two operations, the operation of placing the anchor on the formwork and the operation of transporting the nail to the upper part of the sash anchor, are necessary, and the work efficiency is poor. Furthermore, the nail is about 50 mm long, but because the nail is long, the number of hits with a hammer was high until the completion of driving, and the work efficiency was poor, but these inefficient parts were eliminated. Provided sash anchors.

The nail used for attaching the conventional sash anchor shown in Document 1 to the formwork is a nail having a length of about 50 mm mainly used for formwork construction. Although it is possible to fix the sash anchor to the formwork even with a little shorter nail, in addition to being difficult to hit the short nail, increasing the length of the nail makes it cumbersome and dislikes that the work efficiency is reduced. A nail of about millimeters is used. Since the nail is a long nail, the tip of the nail protrudes from the outside of the formwork for a long time, which is dangerous for the worker. However, a safe sash anchor that eliminates this is provided.

In the conventional sash anchor shown in Document 1, the tip of the nail sometimes protrudes from the concrete surface for a long time because the head of the nail is often buried in the concrete after demolding. Although this was dangerous for workers during the period until the sash installation was completed, a safe sash anchor that solves this problem is provided.

The conventional sash anchor disclosed in the technology shown in Document 2 has a weak dome attachment strength when the number of screws for fixing the dome-shaped cover to the mold is one in the periphery of the dome. There is a possibility that the cover may come off before installation, and if there are multiple screws around the dome, there is almost no possibility that the cover will come off, but it will take time to install on the mold and work efficiency will be poor. However, since nails and screws remain in the disassembled formwork, it takes time to remove the formwork before diversion. A sash anchor that eliminates these disadvantages is provided.

The present invention has been made in view of the above points.

The above problem is solved by using the sash anchor of the present invention.
That is, the sash anchor of the present invention has the following features.

Combine the part embedded in concrete, which is the outer end of a metal rod of a predetermined length, with the inner end that will be welded to the sash frame, etc. to make the body, and one end of the body has a pointed projection that is narrower than the body The one provided with is the main body. In the main body, the body and the protrusion may be joined by spot welding, or the body and the protrusion may be cast integrally. Separately, a part molded in a dome shape with a resin material is used as a cover for the welded portion. The sash anchor is assembled by assembling the main body and the cover, but each time the hammer hits the outer end, which is the embedded part of the main body in concrete, to attach to the formwork, the protrusion on the main body penetrates into the formwork. Yuki is finally fixed to the formwork. At that time, the cover of the welded part, which is the inner end of the body molded from a resin material, is deformed as the protrusions penetrate and the deformation of the cover is completed and the main body is completely fixed to the formwork. Yes. Then, after placing the concrete, the mold is removed and the cover is removed from the concrete while the deformation of the cover of the welded part, which is the inner end of the fuselage molded by the resin material, is eliminated. The welded portion that is the inner end is exposed.
In addition, although the cover of the welded part molded in the dome shape with the resin material is described above, the material is not limited to the resin material, and any material may be used as long as it is a flexible material. Things can be used.

The present invention is as described above, and the following effects can be obtained.
(1) Since the construction is simpler than conventional sash anchors, the manufacturing cost is low, and the post-treatment of drilling the weld anchor with a concrete drill that is frequently required after formwork dismantling, and using a chisel and hammer to weld No post-treatment is required to remove the concrete covering the wall.
(2) It is possible to prevent the occurrence of rust on the outer wall of the building caused by the lack of concrete cover thickness of the conventional steel sash anchor cover.
(3) The number of hits with a hammer at the time of attaching the sash anchor to the formwork can be reduced, and the number of steps of the attaching work can also be reduced. Compared with conventional sash anchors, the work time required for attachment can be reduced to about half, resulting in improved work efficiency.
(4) It is possible to reduce the danger to workers due to the exposure of long nails to the outside of the formwork in the presence of the formwork and to the concrete surface after the formwork is dismantled.

Because of the above effects, a sash anchor having many advantages can be provided.

(A) It is a perspective view which shows an example of the sash anchor of this invention. (B) It is a longitudinal cross-sectional view of FIG. (C) It is an A arrow view of FIG. It is a B arrow view of FIG. It is explanatory drawing which shows before the assembly of FIG. (A) It is explanatory drawing which showed the condition just before attaching an example of the sash anchor of this invention to a formwork. (B) It is explanatory drawing which showed the condition where the example of the sash anchor of this invention was mounted on the formwork, and the concrete was laid. (A) (b) (c) It is explanatory drawing which showed the change of the cover shape after dismantling a formwork sequentially. (A) (b) It is explanatory drawing which showed the condition which attached the example of the conventional sash anchor currently distribute | circulating to the formwork, and cast concrete. It is a perspective view which shows the 2nd example of the sash anchor of this invention. It is a perspective view which shows the 3rd example of the sash anchor of this invention. FIG. 5 is a perspective view for explaining a removal slit 13 according to a first example of a sash anchor of the present invention. FIG. 10 is a detailed view taken along arrow A in FIG. 9. (A) (b) It is a perspective view which shows the 4th example of the sash anchor of this invention. (A) It is a perspective view which shows an example of the conventional sash anchor currently distribute | circulating. (B) It is a longitudinal cross-sectional view of FIG. (C) It is an A arrow view of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1A is a perspective view showing a first example of the sash anchor 1.
The sash anchor 1 shown in FIG. 1B is used in a state in which the main body inner end 4 of the main body 2 is fitted and combined with the support hole 12 for the main body of the cover 11. The combination procedure is shown in FIG.
As shown in FIG. 4A, the sash anchor 1 is placed on the mold 21 and the outer end 5 of the main body is hit with a hammer 23 and attached to the mold 21 as shown in FIG. In this case, the concrete 22 is placed in a state where the cover 11 is deformed while accumulating repulsive force according to the number of hits of the hammer 23.

Thereafter, if the mold 21 is removed as shown in FIGS. 5 (a), (b), and (c), the cover 21 has already accumulated the repulsive force, and therefore the mold 21 that has prevented the rebound is removed. Thus, as shown in FIG. 5 (b), the cover 11 starts to repel, and finally the cover 11 returns to the shape before deformation as shown in FIG. 5 (c) by the hammer 23 of FIG. At this stage, the main body inner end 4 appears on the concrete surface because it is detached from the concrete 22, so that a sash frame or the like can be welded to the main body inner end 4.

FIG. 7 is a perspective view showing a second example of the sash anchor 1.
By providing the removal handle 14 on the cover 11, a removal tool such as an operator's hand or a driver tool can be applied to the removal handle 14, and the cover 11 can be easily removed from the concrete 22 in FIG. .

FIG. 8 is a perspective view showing a third example of the sash anchor 1.
By providing the removal plate 15 on the cover 11, a removal tool such as an operator's hand or a driver tool can be applied to the removal plate 15, and the cover 11 can be easily removed from the concrete 22 in FIG. .

As shown in FIG. 9, by providing the removal slit 13 in the cover 11, when a removal tool such as a driver tool is inserted into the removal slit 13 and squeezed, the cover 22 can be easily removed from the concrete 22 in FIG. Can be removed. The details of the removal slit 13 are shown in cross-sectional detail in FIG. 10, but the removal slit 13 in FIG. 10 is formed by narrowing the gap 16 on the concrete placement side 24 side, so that the removal slit 13 is placed during concrete placement. Since the concrete does not enter the cover 11, a removal tool such as a driver tool cannot be inserted into the removal slit 13 during the subsequent removal of the cover 11.

The main body 2 of FIG. 3 is provided with a groove 7 for a driver tool and a groove 8 for a driver tool at the outer end 5 of the main body 2 as shown in FIGS. By providing the screw-like protrusions 6, it is possible to attach to the mold 21 using a driver tool or an electric screwdriver tool, instead of hitting with a hammer 23 as shown in FIG. it can.

DESCRIPTION OF SYMBOLS 1 Sash anchor 2 Main body or trunk | body 3 Protrusion 4 with a sharp tip 4 Body end 5 Body outer end 6 Screw-shaped projection with a sharp tip 7 Groove for driver tool 8 Groove for driver tool 11 Cover 12 Support hole 13 for main body Detachment slit 14 Detachment handle 15 Detachment plate 16 Clearance 21 Form 22 Concrete 23 Hammer 24 Concrete placement side 31 Buried portion 32 Welded portion 33 Thin steel plate cover 34 Spot welding 35 between the main body and the thin steel plate cover Round steel or body 36 Iron round nails

Claims (6)

A sash anchor embedded in concrete in advance,
A main body of a sash anchor in which a welded portion provided with a projection having a sharp tip which is narrower than the metal rod at one inner end portion of a metal rod having a predetermined length and a portion other than the inner end portion of the metal rod embedded in concrete Sash anchor with parts. The sash anchor according to claim 1, wherein a cover provided with a support hole for a main body is combined with a center portion of the cover so as to fit only a welded portion which is an inner end portion of the main body part of the sash anchor. The inner end portion of the main body part of the sash anchor is inserted into the support hole for the main body into a cover formed of a flexible material and provided with a support hole for the main body in the center portion. 2. The sash anchor according to 2. The sash anchor in any one of Claims 1 thru | or 3 which provided the handle for removal of the state which crosses the said cover bottom face, or provided the plate for removal in the center part of the said cover bottom face. The sash anchor in any one of Claims 1 thru | or 4 which provided the 1 or more removal slit in the outer periphery of the said cover bottom face. The groove | channel for driver tools was provided in the outer end part of the main-body component of the sash anchor, and the screw-shaped protrusion which was narrower and sharper than the metal rod was provided in the inner end part. Sash anchor.

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