JP2012214998A - Metal fitting for insert support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal fitting for insert support, capable of easily improving durability.SOLUTION: A metal fitting 11 for insert support comprises a metal fitting body 12 including a sidewall part 13 and an upper wall part 14. On a lower part of the side wall part 13, an attaching part 16 to which a screw 15 for holding is to be inserted is projected. On a back surface of the sidewall part 13, as a magnet part for attracting the sidewall part 13 to a mold form, a magnet sheet 21 for which rubber or elastomer is a matrix is provided. The metal fitting 11 for the insert support supports an insert 31 to the mold form during construction of placing concrete inside the mold form.

Description

  The present invention relates to an insert support metal fitting for supporting an insert on a formwork.

  As an insert support metal fitting for supporting an insert on a mold, a metal fitting body provided with a side wall portion and an upper wall portion, and an insert holding portion provided on the side wall portion for holding an insert is known. (See Patent Document 1). In the insert supporting metal fitting of Patent Document 1, a donut-shaped magnet is provided on the side wall. By this magnet, the side wall portion is attracted to the mold, so that the displacement of the insert supporting metal fitting relative to the mold is suppressed.

No. 07-052886

  The insert support fitting is removed from the concrete structure after placing concrete in the mold and removing the mold. The removed bracket for supporting the insert is reused. Here, when the insert support bracket is in close contact with the concrete structure, the insert support bracket can be easily removed from the concrete structure by applying an impact to the bracket body by, for example, hitting the bracket body with a hammer. Can be desorbed. At this time, when the impact is transmitted from the metal fitting body to the magnet, for example, the magnet may be cracked. That is, there is still room for improvement in the durability of the insert support fitting.

  This invention is made | formed in view of such a situation, The objective is to provide the metal fitting for insert support which can improve durability easily.

  In order to achieve the above object, the insert support metal fitting according to the first aspect of the present invention is an insert support metal fitting that supports an insert on the mold during construction for placing concrete in the mold. A metal fitting body having a side wall portion and an upper wall portion; an insert holding portion which is provided on the side wall portion and holds the insert; and is provided on the side wall portion and adsorbs the side wall portion to the mold. And a magnet part, wherein the magnet part is made of a magnet sheet having rubber or elastomer as a matrix.

  In this invention, since the magnet part is composed of a magnet sheet and the matrix of the magnet sheet has rubber-like elasticity, for example, the impact resistance of the magnet part can be obtained more than the magnet part made of a sintered body. It becomes like this.

  The invention according to claim 2 is an insert support bracket according to claim 1, which is used for construction in which the concrete is placed after an anchor ruler is placed on the formwork, The gist is that the upper wall portion is provided with a locking portion to be locked to the anchor ruler in a state where the upper wall portion is disposed between the mold and the anchor ruler.

  When placing concrete in the mold, a concrete load is applied to the insert. At this time, there exists a possibility that a side wall part may be in the state inclined because the side wall part separated from a mold frame against the adsorption | suction force with respect to the mold form of a magnet sheet. In this regard, according to the above configuration, the locking portion is locked to the anchor ruler, thereby suppressing the inclination of the side wall portion.

  ADVANTAGE OF THE INVENTION According to this invention, the metal fitting for insert support which can improve durability easily is provided.

(A) is a perspective view which shows the metal fitting for insert support in embodiment, (b) is a rear view which shows the metal fitting for insert support, (c) is a fragmentary sectional view which shows an insert holding | maintenance part and an insert. The perspective view which shows arrangement | positioning of the metal fitting for insert support, a formwork, and an anchor ruler. (A) is a fragmentary sectional view which shows arrangement | positioning of the metal fitting for insert support, (b) is a fragmentary sectional view explaining the effect | action of a latching | locking part. (A) is a partial cross-sectional view showing a state in which concrete is placed, (b) is a partial cross-sectional view showing a state in which a formwork and an anchor ruler are removed from the foundation, and (c) is a foundation in which an insert is embedded. FIG.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.
The insert support metal fitting 11 shown in FIG. 1 (a) supports the insert 31 on the mold when the concrete is placed in the mold. The metal fitting body 12 of the insert supporting metal fitting 11 has an inverted L shape as a whole, and is formed by bending a metal plate. The metal fitting body 12 includes a side wall portion 13 having a flat plate shape and an upper wall portion 14 having a flat plate shape, and is integrally formed at their base end portions. The metal fitting body 12 is made of a metal material such as iron, stainless steel, aluminum, and various alloys.

  A mounting portion 16 through which the holding screw 15 is inserted projects from the lower portion of the side wall portion 13 toward the front side. The attachment portion 16 is formed integrally with the side wall portion 13 by expanding the metal plate. The holding screw 15 is rotatably supported by the attachment portion 16 by being inserted into an attachment hole 16 a penetrating the attachment portion 16. Specifically, as shown in FIGS. 1B and 1C, the head portion of the holding screw 15 is accommodated in the recess 16 b on the back side of the mounting portion 16, and the mounting portion 16. The male screw portion of the holding screw 15 projects from the front side. As shown in FIG. 1C, a restriction piece 17 protruding so as to reduce the diameter of the mounting hole 16a is fixed to the recess 16b, and movement of the holding screw 15 in the axial direction is restricted. That is, the restricting piece 17 prevents the holding screw 15 from being detached from the mounting portion 16. The female screw portion of the insert 31 is screwed into the male screw portion of the holding screw 15. Thus, the attachment portion 16 and the holding screw 15 are configured as an insert holding portion that holds the insert 31.

  A magnet sheet 21 is provided on the back surface of the side wall portion 13 as a magnet portion. The magnet sheet 21 is composed of rubber or elastomer as a matrix. Examples of the rubber include acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), butyl rubber, silicon rubber, and natural rubber. Examples of the elastomer include an olefin elastomer and a urethane elastomer. The matrix may be one kind selected from rubbers and elastomers, or may be a blend of plural kinds selected from rubbers and elastomers.

  The magnet sheet 21 contains magnetic powder. The magnetic powder is not particularly limited, and examples thereof include at least one selected from ferrite magnet powder and rare earth magnet powder. The magnet sheet 21 can be selected and used from a commercial product in which a material containing rubber or elastomer and magnetic powder is formed into a sheet. The thickness of the magnet sheet 21 is, for example, 0.5 mm to 5 mm. The magnet sheet 21 may contain a reinforcing fiber, an ultraviolet absorber, a dispersant, a flame retardant, an inorganic filler, and the like as other components.

  The magnet sheet 21 has an outer shape along the outer shape of the side wall portion 13, and has an opening portion 21 a penetrating in accordance with the opening of the recess 16 b, and is provided on the entire back surface of the side wall portion 13. The magnet sheet 21 has a predetermined shape, for example, by punching, and is fixed to the side wall portion 13 by being bonded to the side wall portion 13 with a commercially available adhesive.

  A locking portion 22 that protrudes upward is provided at the tip of the upper wall portion 14. The locking portion 22 is formed by bending an end portion of the metal plate. The locking portion 22 is locked to the anchor ruler in a state in which the concrete is placed after the anchor ruler is placed on the mold, with the upper wall portion 14 being arranged between the mold and the anchor ruler. . At the center of the locking portion 22, a cutout portion 23 is formed that is cut out to the tip of the upper wall portion 14. By aligning the notch 23 with a mark preliminarily displayed on a formwork or an anchor ruler, the insert support fitting 11 can be aligned.

Next, the usage method and operation of the insert support fitting 11 will be described.
First, the insert 31 is attached to the insert support metal fitting 11 by screwing the holding screw 15 and the insert 31 together. Next, as shown in FIG. 2 and FIG. 3A, the insert support fitting 11 is mounted on the mold 41 so that the upper wall portion 14 is placed on the upper surface of the steel mold 41. At this time, the side wall 13 is attracted to the inner surface of the mold 41 by the attracting force of the magnet sheet 21. That is, the insert support metal fitting 11 is positioned at a predetermined position of the mold 41 by the attractive force of the magnet sheet 21.

  Subsequently, the anchor ruler 42 is placed on the mold 41 and the anchor ruler 42 is positioned by the pin 43. At this time, the position of the insert support fitting 11 can be aligned using the notch 23. The anchor ruler 42 includes a pair of long plates extending in parallel along the pair of molds 41 and a connecting portion that connects the long plates, and the anchor is suspended from the connecting portion. It is configured. An anchor bolt (not shown) is suspended from the connecting portion, and the anchor bolt is disposed at a predetermined position in the mold 41.

  The upper wall portion 14 of the insert support fitting 11 thus mounted on the mold 41 is positioned between the mold 41 and the anchor ruler 42 as shown in FIG. At this time, the locking portion 22 is locked to the side surface of the anchor ruler 42. Next, concrete is poured into the mold 41. At this time, when the load of the concrete is applied to the insert 31, a force that separates the upper portion of the side wall portion 13 from the mold 41 is generated.

  Here, for example, depending on the installation state of the mold 41 and the anchor ruler 42, a gap may be formed between the upper surface of the mold 41 and the anchor ruler 42 as shown in FIG. In this state, when the separating force increases, in the insert support metal fittings that do not have the locking portion 22, as shown by a two-dot chain line in FIG. The side wall 13 may be separated from the formwork 41 against this. That is, the side wall 13 and the insert 31 may be inclined. In this respect, in the insert support metal fitting 11 of the present embodiment, the insert support metal fitting 11 is easily maintained at a predetermined position by the engagement portion 22 being engaged with the anchor ruler 42.

  As shown in FIG. 4A, when the concrete placement is completed, the insert 31 is embedded in the foundation 51. Next, the anchor ruler 42 and the mold 41 are removed, and the insert support fitting 11 is detached from the insert 31 and the concrete while loosening the holding screw 15. Here, as shown in FIG. 4B, when the insert supporting metal 11 and the concrete are in close contact, for example, by hitting the upper wall portion 14 with a hammer or the like, an impact is applied to the insert supporting metal 11 and Separate from concrete. At this time, since the magnet part is comprised from the magnet sheet | seat 21 which used the matrix as rubber | gum or an elastomer, even if an impact is transmitted to a magnet part, a crack etc. are hard to produce in a magnet part.

  As shown in FIG. 4 (c), the base 51 in which the insert 31 is embedded at a predetermined position is formed by detaching the insert support metal fitting 11 in this manner. For example, a bolt for fixing a bracket is screwed to the female thread portion of the insert 31, and a structural material such as a large pull is fixed to the bracket.

The effects exhibited by this embodiment will be described below.
(1) Since the matrix of the magnet sheet 21 is rubber or elastomer, the impact resistance of the magnet portion can be obtained. Therefore, the insert supporting metal fitting 11 that can easily enhance the durability is provided.

  (2) The insert support metal fitting 11 has a locking portion 22 that is locked to the anchor ruler 42 in a state where the upper wall portion 14 is disposed between the mold 41 and the anchor ruler 42. For this reason, when the concrete load poured into the mold 41 is applied to the insert 31, it is advantageous in that the separation between the mold 41 and the side wall portion 13 can be suppressed. In other words, the insert support metal fitting 11 is maintained at a predetermined position without depending only on the attractive force of the magnet sheet 21. In addition, when the latching | locking part latched on the outer side of the formwork 41 protrudes below from the front-end | tip of the upper wall part 14, when the mold 41 is detached | separated after placement of concrete, a latching part becomes an obstacle. There is a risk. In this regard, according to the locking portion 22, the mold 41 can be smoothly detached.

  (3) In the foundation 51 in which the insert 31 is embedded, a concave portion having a shape along the outer shape of the mounting portion 16 is formed as shown in FIG. Here, conventionally, a magnet is provided in the recess 16b, but in the present embodiment, no magnet is provided in the recess 16b, and the magnet sheet 21 is provided only on the back surface of the side wall portion 13, so that the recess is provided. The dimension of the place 16 b, that is, the dimension of the mounting portion 16 that bulges from the side wall portion 13 can be reduced within a range in which the holding screw 15 can be operated. Thereby, the recessed part formed in the foundation 51 can be made small, and as a result, the strength reduction of the foundation 51 caused by the recessed part can be suppressed. Therefore, it is possible to provide the insert support metal fitting 11 that can easily secure the strength of the foundation 51.

In addition, the said embodiment can also be changed and comprised as follows.
-Although the said magnet sheet 21 is provided in the whole back surface of the side wall part 13, you may provide it partially in the back surface. For example, it can also be provided only at the peripheral portion on the back surface of the side wall portion 13. Further, the magnet sheet 21 may be divided and provided at a plurality of locations on the back surface of the side wall portion 13.

  In the insert support fitting 11, the magnet sheet 21 is provided only on the side wall portion 13, but a magnet sheet may be further provided on the lower surface of the upper wall portion 14. In this case, it is easy to increase the attracting force of the insert support fitting to the mold 41.

  The magnet sheet 21 is provided by adhering to the side wall portion 13. For example, the magnet sheet 21 is simultaneously formed and adhered by coating with a paint containing rubber or elastomer and magnetic powder. You may go.

  -In the said embodiment, although the magnet sheet 21 magnetized beforehand is provided in the side wall part 13, it can also be used as the magnet sheet 21 by magnetizing after providing the magnet material sheet which is not magnetized in the side wall part 13. Good.

  The metal fitting body 12, the attachment portion 16, and the locking portion 22 are formed from a single metal plate, but at least one of the attachment portion 16 and the locking portion 22 is formed separately from the metal fitting body 12. Then, it may be integrated by welding or the like.

  The shape and number of the locking portions 22 are not particularly limited, and can be changed to columnar protrusions, for example. Moreover, although the said latching | locking part 22 protrudes from the front-end | tip part of the upper wall part 14, you may provide so that it may protrude from the base end side rather than the front-end | tip of the upper wall part 14. FIG.

  The position and dimensions of the notch 23 are not particularly limited, and may be formed, for example, by notching only the locking part 22 or may be formed on the side part of the locking part 22. . In addition, the said notch part 23 can also be abbreviate | omitted.

-You may comprise the metal fitting for insert support, without providing the said latching | locking part 22. FIG.
A magnet having rubber or elastomer as a matrix may be provided in the recess 16b as an auxiliary. Further, a magnet made of a sintered body may be supplementarily provided in the recess 16b.

-Corrosion of the metal portion may be suppressed by plating or resin coating the metal portion of the insert supporting metal fitting 11.
The insert support fitting 11 of the above embodiment supports the insert 31 on the formwork 41 for the foundation 51. For example, as an insert support fitting that supports the insert 31 on a formwork for a column or wall. Also good. That is, the insert support metal fitting can be used for construction for forming various concrete structures.

Next, the technical idea that can be grasped from the embodiment and the modified examples will be described below.
(A) The insert holding portion includes a holding screw screwed into the insert and a recess in which a head of the holding screw is accommodated, and the recess is formed by expanding a metal plate. By doing so, the insert supporting metal fitting integrated with the side wall portion. In this case, the insert support fitting can be easily manufactured.

  (B) The insert holding portion includes a holding screw screwed into the insert and a recess in which a head of the holding screw is accommodated, and only the metal fitting body which is a portion other than the recess Insert support bracket with a magnet on the top. In this case, by reducing the size of the recess, it becomes easy to reduce the recess formed in the concrete structure based on the recess. As a result, it is possible to provide an insert support fitting that can easily secure the strength of the concrete structure.

  (C) An insert supporting metal fitting that is configured such that the upper wall is attracted to the mold by further providing the magnet sheet on the upper wall.

  DESCRIPTION OF SYMBOLS 11 ... Insert support metal fitting, 12 ... Metal fitting main body, 13 ... Side wall part, 14 ... Upper wall part, 15 ... Holding screw, 16 ... Mounting part, 16a ... Mounting hole, 16b ... Recess, 21 ... Magnet sheet, 31 ... insert, 41 ... formwork, 42 ... anchor ruler, 51 ... foundation.

Claims (2)

An insert support metal fitting for supporting an insert on the mold during construction for placing concrete in the mold,
A metal fitting body having a side wall portion and an upper wall portion;
An insert holding portion that is provided on the side wall and holds the insert;
A magnet portion that is provided on the side wall portion and attracts the side wall portion to the mold;
An insert supporting metal fitting, wherein the magnet portion is made of a magnet sheet having rubber or elastomer as a matrix. An insert support metal fitting used in construction for placing the concrete after placing an anchor ruler on the formwork,
The locking portion that is locked to the anchor ruler in a state in which the upper wall portion is disposed between the mold and the anchor ruler is provided on the upper wall portion. Insert support bracket.

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