JP5106087B2 - Anchor concrete embedding tool - Google Patents

Description

  The present invention relates to a concrete embedding tool for an anchor used for welding and fixing the aluminum sash or the like to the concrete when an aluminum sash or a door frame is installed in the concrete of a building.

  An anchor support portion and the anchor are provided in the hollow portion of the main body of an overturned embedding tool, in which the opening edge portion on the contact surface side with the formwork when the concrete is driven is an annular contact portion that abuts the formwork. At least a pair of fastening parts located through the support part are projected, the anchor support part is provided with an anchor support hole, and the fastening part is provided with an insertion hole for a fastening rod that is fastened to the mold frame. (For example, patent documents).

JP 2006-28732 A

  In the conventional structure, the embedding tool main body is configured in an inverted shape, so that a space for fixing the connecting line to the anchor fixed to the concrete can be secured on the concrete surface, and the nail is removed when demolding. It has the advantage that it can be reused without leaving unnecessary ones in the concrete and is easy to use. However, the conventional structure has an annular contact portion that is a contact portion with the mold frame and a fastening portion that constitutes the insertion hole of the fastening rod when the fastening frame is fixed to the mold frame. The leading end surfaces (on the contact surface side with the mold) are on the same plane, and are continuous with each other.

  For this reason, at the time of fixing to the mold, due to the deformation of the fastening part due to the compressive force or the like when a fastening rod (for example, a wood screw) is tightened, the contact part continuous to the fastening part is deformed and the mold It becomes easy to lift from the surface, and when the concrete is laid, it will penetrate into the anchor embedding tool main body through the gap created by the lift, causing trouble in the mold removal operation. Has a problem that it breaks and remains on the concrete side.

  The present invention has been devised for the purpose of providing a concrete embedding tool for an anchor that eliminates the drawbacks of such a conventional example and is even easier to use.

  An anchor support part and a fastening part are projected from the inner surface of the main body of an inverted fitting device in which the opening edge on the contact surface side with the mold frame is an annular close contact part that abuts the mold frame. Is provided with a support hole for inserting an anchor, and a fixing portion provided with a through hole of a fixing rod that is fixed to the mold, and the embedding tool main body is made of an elastic material such as resin or rubber, Between the front end surface of the said fastening part and the said close part, it was set as the structure which provided the clearance gap which makes these both discontinuous.

  According to the present invention, when the embedded tool main body is fastened to the formwork by the fastening rod through the through-hole provided in the fastening portion in the fastening portion, the external force applied to the fastening rod is the peripheral edge of the embedded tool main body. Therefore, without being affected by the deformation caused by the external force applied to the fastening part, the close part shows the elasticity generated from the material of the embedding tool as it is. It is possible to provide an anchor concrete embedding tool suitable for anchor embedding construction, which reliably prevents the inflow of noro into the main body.

  The drawings show an embodiment of the concrete embedding tool for anchors according to the present invention, FIG. 1 is a longitudinal sectional view, FIG. 2 is a side view of FIG. 1, FIG. 3 is a plan view of FIG. It is sectional drawing shown.

  The concrete embedding tool A for anchor according to the present invention comprises an integrally molded body made of a thermoplastic elastomer, 1 is the main body of the embedding tool A, and the embedding tool main body 1 has an opening on the contact surface side with the mold m. The open edge portion is an annular close contact portion 2 that abuts against the mold m.

  The fallen arm shape body constituting the embedding tool main body 1 is in the embodiment, and the bottom surface contour shape is a diamond shape with rounded corners, but there is no inconvenience in any of a circular shape, an elliptical shape, and a polygonal shape. The embedding tool main body 1 may be a hollow body whose bottom surface side is gradually reduced in diameter from the bottom surface side toward the top edge (necessary form at the time of demolding). Such a form is meant and includes, for example, a cone.

  The contact portion 2 has a contact piece 2b protruding in the form of a skirt on the outer periphery of the flat contact surface 2a. When fixed to the mold m, the contact piece 2b alone or the contact piece 2b and the contact surface 2a Both are in contact with the mold m (the wall surface thereof) to prevent the inflow of noro into the main body 1.

  An anchor support portion 3 is embedded at the center of the inner surface 1 ′ of the embedding tool main body 1, and fastening portions 4, 4 are embedded at both sides of the anchor support portion 3, that is, both longitudinal sides of the embedding tool main body 1. The tool main body 1 is provided with a partly thick wall, the columnar anchor support part 3 is provided with a support hole 5 through which the anchor a is inserted and supported, and the fastening part 4 is provided with a through hole 7 of the fastening rod 6. The distal end surfaces (free end surfaces) 3a and 4a of the anchor support portion 3 and the fastening portion 4 are flat and arranged on the same surface as the contact surface 2a of the contact portion 2.

  As described above, the fastening parts 4 and 4 are arranged on both sides in the longitudinal direction (of the rhombus) of the embedding tool main body 1, so that the fastening parts 4 are used to stabilize the fastening parts 4 and 4. Although a fastened state can be obtained, if the embedding tool main body 1 has a bottom-side circular fallen shape, it is difficult to obtain a stable fastened state unless fastened by the fastening rod 6 in at least three directions. Therefore, the number and arrangement of the anchors 1 for fixing the main body 1, that is, the embedding tool A to the mold m are determined by the form of the embedding tool main body 1, and in the case of the embodiment, only one direction side is the longitudinal direction. Therefore, it is possible to use a minimum number of two anchoring rods.

  Further, the fastening portion 4 is formed in a columnar shape (however, short) like the anchor support portion 3 and is provided with the through hole 7 on the axis thereof, thereby forming a columnar shape, and the tip surface 4a When the both surfaces 4a and 2a are in contact with the mold frame m, the both surfaces 4a and 2a are discontinuous so as to contact each other independently from each other between the contact surface 2a of the contact portion 2 of the embedding tool main body 1 (both surfaces). 4a and 2a are cut off) and a gap c is provided.

  Then, the embedding tool A is arranged at a predetermined installation position of the mold m, the fastening rod 6 is passed through the through hole 7 of the fastening part 4, and the leading end thereof is buried in the mold m to be embedded. Is fixed to the mold m, and then the concrete supporting space in which the anchoring portion a ′ is formed of the mold m by using the support hole 5 provided in the anchor supporting portion 3 in the anchor supporting portion 3. The anchor a is inserted and supported so as to protrude inward.

  Next, when concrete is placed in a concrete placement space composed of a mold m and the like is solidified and then demolded, the locking portion a ′ side is embedded in the concrete B, and the tip side is the tip side. The construction state of the anchor a, which is disposed in the concave space 13 for welding work with the connecting reinforcing bar or the like, can be obtained.

  At the time of fixing (fixing) the embedding tool A to the mold m in this process, the tip of the fixing rod 6 (a nail is used in the embodiment, but a wood screw may be used) is inserted into the mold m through the through hole 7. By inserting, the embedding tool A is fixed to the mold m. The fixing is performed by the head 6a of the fastening rod 6 pressing the periphery of the through-hole 7, and the embedding tool A (the embedding tool main body 1). ) Is brought into pressure contact with the mold m. When the external force is applied to the head 6a of the fastening rod 6 more than necessary (by tapping or the like) and the periphery of the through hole 7 is pressed by the head 6a, the fastening portion 4 constituting the through hole 7 is applied. The front end surface 4a is in pressure contact with the mold m, the external force is concentrated on the front end surface 4a, and the contact piece 2b is bent and deformed at the close contact portion 2 which is not continuous with the front end surface 4a by the gap c. The close contact surface 2a is pressed against the mold m by the elasticity of the material of the main body 1, and can prevent the inflow of concrete into the embedding tool main body 1 when the concrete is placed. In other words, in the embodiment, the mold of the fastening rod 6 is obtained by embedding the tip of the fastening rod 6 in the mold m due to the presence of the contact piece 2b and visually checking the contact state of the contacting piece 2b with the mold m. The degree of embedding in the frame m can be discriminated. Even if the amount of embedding is larger than the required amount, the close contact surface 2a is pressed against the mold m, and the concrete flows into the cavity inside the main body 1 when placing concrete. It can be prevented.

FIG. The side view of FIG. The top view of FIG. Sectional drawing which shows a use condition.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Implantable tool main body 2 Close part 3 Anchor support part 4 Fastening part 5 Support hole 6 Fastening collar 7 Through-hole c Clearance m Formwork

Claims (1)

  An anchor support part and a fastening part are projected from the inner surface of the main body of an inverted fitting device in which the opening edge on the contact surface side with the mold frame is an annular close contact part that abuts the mold frame. Is provided with a support hole for inserting an anchor, and a fixing portion provided with a through hole of a fixing rod that is fixed to the mold, and the embedding tool main body is made of an elastic material such as resin or rubber, A concrete embedding tool for an anchor, in which a gap is formed between the distal end surface of the fastening portion and the close contact portion so that the two are not continuous.

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