JP2010270576A - Insert fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insert fixture which sets an insert at a predetermined position in a concrete form correctly and easily in a construction work site of a building or the like, and which facilitates handling of a nail out of the concrete after removal of the form. <P>SOLUTION: A holding part 3 projecting axially on a disk-like base 2 is provided, and the holding part 3 has a through-hole 4 having the nail 10 inserted vertically in its center. Furthermore, the holding part 3 has its outer circumference formed into polygonal or cylindrical shape so as to be firmly fitted into the screw hole G of the insert 7. An insert settlement base 2a is connected with the holding part 3 and a connecting part 8 at a position one step down from the surface of base 2 in the inner circumference thereof. A flange 6 parallel with the base 2 is provided on a direction blade 5 upright from the base 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an insert fixing tool for fixing an insert embedded in a concrete structure in a building work such as a building to a formwork.

  Conventionally, as this type of insert fixture, a pedestal is generally installed at a predetermined position of a concrete formwork, a plurality of nails are struck and fixed to the formwork, and an insert is struck into the pedestal to place concrete. After being installed, it is demolded and embedded in concrete is disclosed in Japanese Patent Publication No. 11-348027. However, the insert holder described in this publicity has been troublesome in nail processing such as driving a plurality of nails into a mold and cutting a plurality of nails protruding from a concrete surface after demolding.

  Moreover, if iron nails are used as nails that are inserted into the concrete formwork in the insert holders published in this public relations, not only is the nailing process difficult, but the nails left on the concrete begin to corrode by the atmosphere and cause deterioration of the concrete. It leads to. Therefore, resin nails that are difficult to corrode and are easy to cut have become universal. However, since the strength of the material is inferior, the resin nails may break during construction.

Therefore, one nail is placed in the center of the insert to be fixed to the formwork with one nail and driven into the formwork, and the nail is easily detached from the concrete side after demolding after being embedded in concrete. What can be done is disclosed in the publication of Japanese Patent Publication No. 2008-75395. However, the insert described in this publication has a difficulty in that it is expensive in terms of production cost due to its complicated structure.
Patent Publication No. 11-348027 Patent Publication No. 2008-75395

  Therefore, the present invention can easily fix a nail made of a material that is difficult to break to a concrete formwork, and holds and guides the nail so that it can be driven vertically with respect to the formwork, and at the time of demolding. The nail is formed as an integral structure that is held by the insert fixture without being detached and left on the mold side, and the nail protruding from the concrete surface can be grasped with pliers etc. and pulled out. Providing is an issue.

As a specific means for solving the problems of the conventional example, the present invention is provided with a holding portion 3 projecting on the axis of the disk-shaped pedestal 2, and a through-hole 4 through which a nail 10 is inserted vertically at the center of the holding portion 3. The outer periphery is formed in a polygonal shape or a cylindrical shape so that the holding portion 3 is tightly fitted in the screw hole G of the insert 7, and the insert fits on the inner periphery of the pedestal 2 at a position lowered by one step. 2a is connected to the holding portion 3 and the connecting portion 8, and a flange portion 6 parallel to the pedestal 2 is provided on the azimuth blade 5 standing upright from the pedestal 2.
This invention is an insert fixture which consists of the above structure.

  As described above, the insert fixture according to the present invention has a simple structure and is integrally formed so that the cost is low and it is fixed to the concrete mold with only one nail. Since the nail driving process and the nail pulling process after demolding are facilitated, an effect of labor saving can be obtained.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes an insert fixture according to the present invention, which is provided with a holding portion 3 protruding on the axis of a disk-shaped pedestal 2. 3 has a through-hole 4 through which a nail 10 is inserted vertically, and the outer periphery is formed in a polygon or a cylinder so that the holding portion 3 is tightly fitted in the screw hole G of the insert 7. In the inner circumference of 2, the insert seat pedestal 2 a is coupled to the holding portion 3 and the coupling portion 8 at a position lowered one step, and the azimuth blade 5 standing upright from the pedestal 2 has a flange portion 6 parallel to the pedestal 2.

  As shown in FIG. 6, the insert fixture 1 having the above-described configuration is set at a point where two orthogonal ruled lines 9 marked on the mold 11 intersect. Therefore, by aligning the four azimuth wings 5 formed on the cross line from the center point of the pedestal 2 of the insert fixture 1 on the ruled line 9, the nail 10 can be driven at the intersection of the ruled line 9. it can. Therefore, the insert fixture 1 can be installed at a predetermined position.

  Next, the construction procedure of the insert fixture 1 will be described with reference to FIGS. 4 (a) to 4 (d) and FIG. First, as shown in FIG. 4A, the insert fixture 1 is installed at a predetermined position of the mold 11, and the nail 10 is inserted into the through hole 4 of the holding portion 3 to fit the insert 7. Next, as shown in FIG. 4 (b), by hitting the insert 7 with a tool such as a hammer, the nail 10 is simultaneously guided vertically through the through-hole 4 and driven into the mold 11. 7 and the insert fixture 1 are fixed to the mold 11. Here, since the tip end portion of the insert 7 fits in the insert fitting base 2 a and is just fitted to the inner periphery of the base 2, the concrete frame prevents the penetration of the insert 7 into the screw hole G of the insert 7. Concrete can be placed on top.

  Next, after the concrete is hardened, the mold 11 is removed as shown in FIG. At this time, since the holding portion 3 is fitted in the screw hole G of the insert 7 and the holding portion 3 and the insert receiving base 2a are coupled by the coupling portion 8, the mold 11 is moved downward. The nail 10 and the holding part 3 do not follow the mold 11 just by removing them, and the insert 7 and the insert fixture 1 are embedded in the state where they are held as they are on the insert fixture 1 side.

  After removing the formwork 11, as shown in FIG. 4 (c), the nail 10 protruding outward from the concrete C is grasped and pulled out with pliers or the like. At this time, traction force is applied to the insert fixture 1, but the holding portion 3 and the insert receiving base 2 a are prevented while preventing the insert fixture 1 from being pulled out of the concrete C by the resistance force of the flange portion 6 shown in FIGS. 1 and 5. The connecting portion 8 is divided, and the nail 10 and the holding portion 3 are detached integrally. Therefore, the screw hole G is opened as shown in FIG.

  By the above, as shown in FIG. 5, the screw hole G and the bolt Z of the insert 7 can be screwed together. In addition, since the surface area by which the insert 7 is directly embedded in the concrete C is large, the tensile strength can be increased.

It is a perspective view of the insert fixture of the present invention. It is sectional drawing by the AA cutting line of FIG. It is sectional drawing by the BB cutting line of FIG. It is sectional drawing by the AA cutting line of FIG. 1, and is a figure which shows the embedding method of insert. (A) shows the state which installed the insert fixture to the formwork. (B) shows a state in which concrete is placed after the insert is driven into the insert fixture and fixed to the mold. (C) shows a state in which the mold is removed after the concrete is hardened. (D) is a figure which shows the state in which the nail process of the insert fixing tool embed | buried under concrete was performed. It is sectional drawing by the BB cutting line of FIG. 1, and is a figure which shows the state by which the insert embed | buried under the concrete and the volt | bolt were screwed together. It is a top view which shows the state which installed the insert fixture of FIG. 1 in the predetermined position of the formwork. It is a bottom view of the present invention.

DESCRIPTION OF SYMBOLS 1 Insert fixture 2 Base 2a Insert accommodation base 3 Holding | maintenance part 4 Through-hole 5 Directional wing 6 Flange part 7 Insert 8 Coupling part 9 Ruled line 10 Nail 11 Formwork C Concrete G Screw hole Z Bolt

Claims (1)

  A holding portion 3 projecting on the axis of the disk-shaped base 2 is provided, and a through hole 4 for vertically inserting a nail 10 is provided at the center of the holding portion 3, and the holding portion is inserted into the screw hole G of the insert 7. 3 is tightly fitted so that the outer periphery is formed in a polygonal shape or a cylindrical shape, and the inner periphery of the pedestal 2 is inserted into a position lowered by one step, and the pedestal 2a is coupled to the holding portion 3 and the coupling portion 8, An insert fixture in which an upright bearing wing 5 is provided with a flange portion 6 parallel to the base 2.

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