JPH11198117A - Anchor supporting tool for form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate to handle a supporting tool for embedding an anchor into a concrete product during molding and to make excellent the finishing of the concrete product. SOLUTION: An anchor supporting tool 11 for a form is formed of a supporting tool main body 15 and a bush body 16. The anchor supporting tool 11 for a form is integrally formed of a flexible resin-made resin part 23 wherein a bolt-like fixing tool part 21 and a core body part 22 are made as an inserting body. In the resin part 23, a bush storing part 23c storing the bush body 16 is formed. In the resin part 23, an elastically deformable lip part 23b and a bush hooking part 23f are integrally formed. In the bush body 16, a cut part for mounting and removing of an anchor 2 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, an anchor support for a mold for supporting an anchor in a mold and embedding and fixing the anchor in a concrete product formed in the mold.

[0002]

2. Description of the Related Art Conventionally, in civil engineering and construction, for example, FIG.
As shown in FIG. 1, there is known a configuration in which an anchor 2 is embedded in a concrete product 1, a metal fitting is hooked on a head 2a of the anchor 2, and the concrete product 1 is lifted. And
A hemispherical recess 1b is formed on the surface 1a of the concrete product 1 so that the anchor 2 does not protrude from the surface 1a of the concrete product 1, and the head 2a of the anchor 2 is positioned inside the recess 1b. It has become.

[0003] Conventionally, when the concrete product 1 is manufactured, the anchor 2 is supported at a predetermined position in the formwork, and a concave portion 1b is formed in the concrete product 1 to form a recess 1b. An anchor support is used. The anchor support for a formwork is also called a masking or a former, and a metal (casting) former, a rubber former, or a hard resin former fitted with an O-ring is known. Among them, the metal former is easily rusted and heavy, and has poor mold release. Therefore, the periphery of the former tends to be chipped at the time of demolding and has a problem that requires repair. Further, the rubber former has a problem that the life is short, the rubber expands due to heat or oil such as a release agent, and cement easily enters the gaps, and the maintenance management becomes complicated. Furthermore, the hard resin former has a sealing property with the mold,
Although a separate rubber O-ring is fitted, the durability of the O-ring is low, and there is a problem that the finished surface is likely to be deteriorated if maintenance of the O-ring is neglected.

[0004]

As described above, a conventional anchor support for a mold is easily rusted when it is made of metal.
It is heavy and needs to be repaired due to poor mold release.Rubber products have a short life, expand due to heat or oil such as release agent, and maintenance management becomes complicated. There is a problem that the durability of the O-ring for providing the sealing property is low, and if the maintenance of the O-ring is neglected, the finished surface is likely to be deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an anchor support for a formwork which is easy to handle and has a good finish.

[0006]

According to a first aspect of the present invention, there is provided an anchor support for a mold for supporting an anchor in a mold and embedding and fixing the anchor in a molded product formed in the mold. An anchor support, comprising: a support body detachably attached to the formwork; and a bush body detachably attached to the anchor and detachably attached to the support body. The main body includes a fixing part that is detachably fixed to the mold, a core part provided on the fixing part, and a bulge that integrally covers the core part and forms a recess in the molded product. An elastically deformable lip located at the base end of the bulging portion and in close contact with the formwork; a bush housing portion provided in the bulging portion for housing the bush body; Bullet that elastically engages with the bush body A resin portion integrally provided with a deformable bush engaging portion, wherein the bush body has a fitting portion detachably fitted to the anchor, and an engagement receiving portion engaged with the bush engaging portion. And a part.

In this configuration, the support body is fixed to the inner surface of the mold using the fixing part. At this time, the elastically deformable lip comes into close contact with the inner surface of the mold. Further, when the bush body fitted to the anchor is inserted into the bush housing portion, the bush engaging portion elastically engages with the engagement receiving portion, and the anchor is positioned and supported. In this state, the molding material is introduced into the mold. After the molding material is solidified, when the mold is removed, the elastic engagement between the bush engaging portion and the engagement receiving portion is released, the support body is removed together with the mold, and a recess is formed in the molded product. It is formed. Subsequently, by removing the bush body, an anchor that is exposed in the recess is obtained. And, since the support body has a core portion covered with a resin portion and an elastically deformable lip portion which is in close contact with the mold frame is provided on the resin portion, the releasability is easily improved,
The finish of the surface of the molded product becomes good, and post-processing is not required, and the work becomes easy. In addition, since the resin portion is provided with the elastically deformable bush engagement portion that elastically engages with the bush member, the attachment and detachment of the bush member is facilitated. Furthermore, since the elastically deformable lip and the bush engaging portion are formed integrally with the resin portion, the number of parts is reduced, and the molding material does not enter into the gap where the separate member is attached, so that the handling is easy. It will be easier. Also, since the core portion is integrally covered with the swelling portion of the resin portion, for example, compared with a configuration in which a bolt with a plate is incorporated through a crack of the molded rubber, cement flows in from the crack, and the like. No, the life is extended.

According to a second aspect of the present invention, there is provided the anchor support for a formwork according to the first aspect, wherein the resin portion of the support body has a plurality of hollow portions opening to the base end side; The ribs provided between the cavities are integrally formed, and the lip is formed so as to surround the cavities and the ribs.

In this configuration, since the hollow portion is provided in the resin portion, the molding of the resin portion is facilitated, and the manufacturing cost is reduced. In addition, since the ribs are provided integrally between the cavities, the structure is simplified and the strength of the resin portion is ensured. Further, the cavity and the rib are surrounded and sealed by the lip.

According to a third aspect of the present invention, there is provided the anchor support for a formwork according to the first or second aspect, wherein the fitting portion of the bush body has a cylindrical shape capable of being elastically deformed, and is formed in an axial direction. Is formed along the notch.

In this configuration, the elastically deformable cylindrical fitting portion is fitted to the outer periphery of the anchor, and the bush body is securely fitted to the anchor, and the fitting portion is removed from the notch portion. By opening, the bush body is easily removed from the anchor.

According to a fourth aspect of the present invention, there is provided the anchor support for a mold according to any one of the first to third aspects, wherein a recess is formed in an outer peripheral portion on a base end side of the bush body. Things.

[0013] In this configuration, when the bush body is inserted into the bush accommodating portion, the sliding resistance is reduced, the bush body is easily deformed, the insertion work is facilitated, and the whole is tapered. It is harder to pull out as compared to the configuration in which the shape is formed.

According to a fifth aspect of the present invention, there is provided the anchor support for a formwork according to any one of the first to fourth aspects, wherein the fixing portion is fixed by inserting an external fixing device from the outside. A fixing receiving portion; and a stopper for restricting an insertion dimension of the external fixing tool.

[0015] In this configuration, since the insertion dimension of the external fixing tool is regulated by the stopper portion, problems such as inserting the external fixing tool beyond a predetermined dimension and pushing the anchor are prevented.

According to a sixth aspect of the present invention, there is provided an anchor support for a formwork according to any one of the first to fifth aspects, wherein a magnet mounting portion formed on the support body and a magnet mounting portion are provided. And a magnet body to be attached.

In this configuration, a magnet mounting portion is formed in the support body, and a magnet body is mounted on the magnet mounting portion as necessary, and the form-mounting anchor support of the form is attracted to the form. It can be used as a tool.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an anchor support for a formwork of the present invention.

In FIGS. 1 and 2, reference numeral 11 denotes a form former as an anchor support for the form.
When the concrete product 1 as a molded product is manufactured, the anchor 2 is supported at a predetermined position in the mold 12 and the recess 1b is formed in the concrete product 1 formed in the mold 12. I have. Note that the anchor 2 and the concrete product 1 supported by the present embodiment are the same as those of the related art, and as shown in FIG.
An anchor 2 is embedded in a concrete product 1, a metal fitting is hooked on a head 2 a of the anchor 2, and the concrete product 1 is lifted.
A semi-spherical concave portion 1b is formed on the surface 1a of the concrete product 1 so as not to protrude from the surface 1a of the concrete product 1, and the head 2a of the anchor 2 is positioned inside the concave portion 1b.

That is, the form former 11 is also called a former or a masking. The support body 15 is detachably attached to the mold 12, and the support body 15 is detachably attached to the anchor 2 and is detachable from the support body 15. And a bushing body 16 that can be attached.

Then, the support body 15 is provided with the support member 15 shown in FIGS.
As shown in the figure, the fixing part 21, the core part 22, and the resin part 23
It has. The fixing part 21 is a nut formed of metal or the like. The fixing part 21 is a screw part 21a formed with a female screw as a fixing receiving part. And a so-called female screw former. Then, a wing bolt 25 as an external fixing tool inserted into the mounting hole 12a formed in the mold frame 12 is inserted and screwed into the screw portion 21a. That is, this wing bolt 25 has a male screw portion 25a formed on the outer peripheral portion and a knob portion 25 formed on the base end portion.
b is formed, and a separate wing nut 26 is screwed into the male screw portion 25a. By screwing and tightening the wing bolt 25, the supporter body 15 is fixed to the mold frame 12. It has become. Since a stopper 21b having a small diameter is formed at the tip of the screw 21a, a wing bolt 21b is formed.
25 stops by hitting this stopper portion 21b, that is,
The screw-in dimensions of the wing bolt 25 are regulated. Therefore,
The wing bolt 25 protrudes, pushes in the anchor 2 and the anchor 2
Is prevented from being moved or dropped. The stopper portion 21b may be formed as a step or an incomplete screw portion so as not to be screwed.

The core body 22 is formed of metal or the like, and has a cylindrical portion 22a which slightly expands toward the distal end side, and which extends inward from the base end of the cylindrical portion 22a, and is caulked or welded. A bottom plate portion 22b fixed to the fixing portion 21 by the above-described method, and a flange portion bent outward from the tip of the cylindrical portion 22a.
22c, etc. to form a reinforcing insert plate.

Further, the resin portion 23 is formed by fixing the fixing portion 21 to the core portion.
22 is integrally formed by injection molding in which an insert part for reinforcing and attaching to the mold 12 is put into a mold and filled with a soft resin. And
A soft resin has a better release property than a metal, and has good heat resistance and chemical resistance (oil resistance) as compared with rubber, and has a certain elasticity. For example, an olefin-based thermoplastic elastomer is used. The flexural modulus is 5000 × 10 ⁴ or more and 20000 × 10 ⁴ or less [N / m ² ] according to the test method of JIS K7203. The resin portion 23 has a bulged portion 23a which covers the head portion 21a and the core portion 22 of the fixing portion 21 and projects in a hemispherical shape toward the distal end. An elastically deformable lip portion 23b is formed thinly on the outer peripheral portion of the base end of the bulging portion 23a. The lip portion 23b expands to the outer periphery when attached to the mold frame 12, and elastically adheres to the mold frame 12 to seal.
Further, a plate-like rib portion 23c radially arranged is formed inside the lip portion 23b, and
A plurality of cavities 23d are defined by the ribs 23c and open toward the base end, thereby improving moldability and economy. Further, the strength of this portion is ensured by the rib portion 23c. In addition, each rib portion 23c is formed with a hole portion 23c1 opening to the base end side, and
The base end portion of 23c is an annular magnet mounting part 23d1
It has become.

Further, a bush accommodating portion 23e into which the bush body 16 is inserted is formed at the center of the bulging portion 23a so as to open to the front end side. And this bush storage part 23e
Is formed in a slightly expanding shape toward the front end side, and an elastically deformable bush engaging portion 23f projecting inward is formed in the opening portion. That is, the bush housing portion 23e has a smaller diameter at the entrance than the inside, but the inner diameter of the bush engaging portion 23f can be easily removed from the mold even when the resin portion 23 is formed, and The bush body 16 is set to have such a size that it does not easily come off after insertion.

As shown in FIGS. 1, 2, 5, and 6, the bush body 16 is formed integrally with rubber and has an elastically deformable cylindrical shape fitted to the outer periphery of the anchor 2. It has an attachment portion 16a. And this fitting part 16a
An engagement receiving portion 16b, which is elastically engaged with the bush engaging portion 23f to prevent the bushing engagement portion 23f from coming off, is formed in a stepped recess on the outer peripheral surface on the tip side. In addition, the base end side of the fitting portion 16a is formed as an inclined surface 16c whose outer peripheral surface gradually decreases in diameter toward the base end side, and the inclined surface 16c is axially provided at predetermined intervals in the circumferential direction. A plurality of concave portions 16d for insertion having a longitudinal direction is formed. In the inclined surface 16c, the inner diameter of the inner space is formed larger than that of the front end side. Further, a cutout portion 16e is formed in the fitting portion 16a along the axial direction, and the fitting portion 16a is formed along the cutout portion 16e.
Can be opened to release the fitting of the anchor 2. Further, the inner peripheral surface on the base end side of the fitting portion 16a is formed as an inclined surface 16f whose diameter gradually increases toward the base end side, and conforms to the shape of the head 2a of the anchor 2.

Next, a method of using the form former 11 will be described.

First, the screw portion 21a of the support body 15 is
Align the mounting holes 12a from the inside, insert the wing bolts 25 from the outside of the formwork 12, screw them together, and tighten
15 is fixed inside the formwork 12. Further, the bush body 16 is fitted on the outer peripheral portion of the anchor 2, and the bush body 16 fitted with the anchor 2 is pressed into the bush accommodating portion 23 e of the support body 15. In this state, the bush engaging portion 23f and the engaging receiving portion 16b are engaged to prevent the bush engaging portion 23f from coming off, and the anchor 2 is supported at a predetermined position inside the formwork 12. Then, in this state, the inside of the mold 12 is filled with cement.

After the cement has hardened, the mold 12 is removed while the support body 15 is fixed to the mold 12. At this time, the elastic engagement between the bush engaging portion 23f and the engagement receiving portion 16b is released, and as shown in FIG.
And remains on the concrete product 1 side.

Subsequently, the bush body 16 is opened at the notch 16e and removed, thereby forming a recess 1b in the concrete product 1 and exposing the head 2a to the recess 1b as shown in FIG. The anchor 2 is fixed.

According to the present embodiment, the support body 15 of the mold former 11 has a surface integrally covered with a soft resin, and an elastically deformable lip 23b which is in close contact with the mold 12 is also integrally formed. In other words, as a so-called soft resin integrated mold former (soft resin integrated former), the mold release property of concrete is better and the finish can be improved compared to metal formers, and repair around the former after demolding Can be eliminated, labor can be saved, and workability can be improved. Further, the weight can be reduced as compared with a metal former.

Since the soft resin is used, the lip portion 23b can be formed integrally with the resin portion 23.
Since there is no need to use a ring or the like and there is no portion into which cement easily enters, maintenance and management can be facilitated.

Further, in the case of the soft resin, a material having good releasability, heat resistance and oil resistance can be easily selected as compared with rubber and hard resin, and by using such a material,
Durability can be improved.

Further, since the fixing part 21 and the core part 22 are integrally inserted into the resin part 23 made of a soft resin, the strength can be ensured and the mounting part to the mold 12 is integrally formed. it can. In addition, since the core portion 22 is integrally covered with the bulging portion 23a of the resin portion 23, cement flows in from the crack as compared with, for example, a configuration in which a bolt with a plate is incorporated through a crack in the molded rubber. In particular, the life of the bolt-integrated resin molded product as shown in FIGS. 10 and 11 can be extended.

Further, a plurality of hollow portions 23 are formed in the resin portion 23a.
The provision of d facilitates the molding of the resin portion 23a, saves resin material, and reduces manufacturing costs. Further, since the rib portions 23c are provided between the hollow portions 23d, the strength of the resin portion 23a can be secured. In addition, these hollow parts 23d
The rib 23c can be sealed by being surrounded by the lip 23c.

The bush engaging portion 23f for engaging and holding the engagement receiving portion 16b of the bush body 16 is provided with a resin portion 23 made of a soft resin.
Since the bush body 16 is integrally formed so as to be elastically deformable, the bush body 16 can be easily attached to the support body 15 by press fitting, and can be supported with a predetermined strength.

Further, the bush body 16 has a notch at one place.
16e to facilitate attachment and detachment to the anchor 2. Also,
An inclined surface 16c is formed on the outer peripheral portion of the bush body 16, and a plurality of recesses 16d for peeling are formed on the inclined surface 16c, so that when the bush body 16 is inserted into the bush housing portion 23e, And the sliding resistance can be reduced.
Can be easily deformed, without the need for a press-in tool like a hard resin bush that is hard to assemble, and can be easily assembled, and like a metal bush,
Compared to a configuration in which the whole is formed as a tapered surface with a large inclination, it can be harder to come off after setting.

Further, as shown in FIGS. 8 and 9, since the magnet body 23d1 is formed in advance on the support body 15, the magnet body M is mounted on the magnet body 23d1 to form the mold. It can be used as a so-called magnet former which is an anchor support for a mold in a form to be adsorbed to the mold. That is, the magnet body M includes an annular magnet body M1 and a yoke M2 that covers the magnet body M1 except for the mold side, and has through holes M3 at four locations. Then, the screw M4 inserted into each through hole M3 is screwed and fixed to the hole 23c1 of the rib 23c of the support body 15 while the magnet body M is fitted in the magnet mounting portion 23d1. You.

In this configuration, by forming the magnet mounting portion 23d1 on the support main body 15, the magnet body M can be mounted on the magnet mounting portion 23d1 as necessary. Therefore, versatility can be improved as compared with a configuration using an anchor support for a mold that integrally inserts a magnet, and in terms of manufacturing, there is no need to manufacture a mold separately, and the manufacturing cost of the mold is reduced. In addition to being able to reduce the number of products, the number of types is reduced during sales and use, thereby facilitating inventory management and reducing management costs. Can be expanded.

In the above embodiment, a nut having a female screw is inserted as the fixing part 21 in the resin part 23, but various fixing parts fixed to the mold 12 may be used in addition to the nut. Can be. For example, FIGS. 10 and 11
As shown in (1), a bolt having a male thread portion 21c can be insert-formed as the fixing portion 21. In this configuration, the male screw portion 21c is inserted into the mounting hole 12a formed in the mold frame 12, and if necessary, a nut such as a wing nut is screwed and tightened via a washer or the like, thereby obtaining the support body. 15 is fixed to the mold 12.

Further, the core portion 22 may be formed integrally with the fixing portion 21.

[0041]

According to the anchor support for a formwork of the first aspect, the support body covers the core portion with the resin portion.
Since this resin part is provided with an elastically deformable lip that is in close contact with the mold, the releasability can be easily improved, the finish of the surface of the molded product can be improved, and post-processing is not required. Can be. In addition, since the resin portion is provided with the elastically deformable bush engaging portion that elastically engages with the bush member, the bush member can be easily attached and detached. Furthermore, the elastically deformable lip and the bush engaging part are formed integrally with the resin part, so that the number of parts can be reduced and the molding material does not enter the gap where the separate member is attached, making it easy to handle. Can be. Also, since the core portion is integrally covered with the swelling portion of the resin portion, for example, compared with a configuration in which a bolt with a plate is incorporated through a crack of the molded rubber, cement flows in from the crack, and the like. And the service life can be extended.

According to the anchor support for formwork of the second aspect, in addition to the effect of the first aspect, since the hollow portion is provided in the resin portion, the molding of the resin portion can be facilitated and the manufacturing cost can be reduced. it can. In addition, since the ribs are integrally provided between the cavities, the structure can be simplified and the strength of the resin portion can be secured. Furthermore, these cavities and ribs are
It can be sealed around the lip.

According to the anchor support for formwork of the third aspect, in addition to the effects of the first or second aspect, the elastically deformable cylindrical fitting portion is fitted on the outer periphery of the anchor to form a bush. The body can be securely fitted to the anchor, and the bush body can be easily removed from the anchor by opening the fitting portion from the notch.

According to the anchor support for formwork of the fourth aspect, in addition to the effect of any one of the first to third aspects, the recess is formed in the outer peripheral portion on the base end side of the bush, so that the bush can be used. At the time of insertion into the bush storage section, sliding resistance is reduced, the deformation of the bush body is facilitated, the insertion operation can be facilitated, and the bush can be harder to pull out as compared with a configuration in which the whole is tapered.

According to the anchor support for formwork of the fifth aspect, in addition to the effects of any one of the first to fourth aspects, in addition to the effects of the first to fourth aspects, the fixing receiving portion to which the external fixing tool is inserted and fixed from the outside to the fixing portion. Part and a stopper for restricting the insertion dimension of the external fastener are provided, so that the insertion dimension of the external fastener is regulated by the stopper. It is possible to prevent troubles such as accidents.

According to the anchor support for formwork of the sixth aspect, in addition to the effect of any one of the first to fifth aspects, by forming the magnet mounting portion on the support body,
A magnet body can be attached to the magnet attachment portion as required, and can be used as a form anchor support in a form to be attracted to the form. Therefore, the versatility is improved, and the manufacturing cost of the mold and the management cost of the stock can be reduced as compared with the configuration using the anchor support for the mold in which the magnet is integrally formed by insert.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a working process using an anchor support for a formwork according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same anchor support for a formwork.

FIG. 3 is a cross-sectional view of a support body of the anchor support for a formwork.

FIG. 4 is a bottom view of the support body of the anchor support for a formwork as viewed from the base end side.

FIG. 5 is a cross-sectional view of the anchor support for a formwork with the bush body partially cut away.

FIG. 6 is a bottom view of the bush body of the anchor support for the formwork as viewed from a base end side.

FIG. 7 is an explanatory view showing a molded product and an anchor.

FIG. 8 is a cross-sectional view of a disassembled state showing an example of use in which a magnet body is attached to the anchor support for a formwork and used.

FIG. 9 is a perspective view of the magnet body.

FIG. 10 is a cross-sectional view showing another embodiment of the support body of the anchor support for formwork of the present invention.

FIG. 11 is a perspective view of the support body of the anchor support for a formwork as viewed from the base end side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete product as a molded product 2 Anchor 11 Form former as an anchor support for a formwork 12 Formwork 15 Support body 16 Bush body 16a Fitting part 16b Engagement receiving part 16d Depression 16e Notch part 21 Fixing part 21a Screw part 21b Stopper part 22 Core part 23 Resin part 23a Swelling part 23b Lip part 23c Rib part 23d Cavity part 23d1 Magnet mounting part 23e Bush storage part 23f Bush engaging part 25 Butterfly as external fixing tool Bolt M Magnet body

Claims (6)

[Claims] 1. An anchor support for a mold for supporting an anchor in a mold and embedding and fixing the anchor in a molded product formed in the mold, wherein the support is detachably attached to the mold. A fixture body, comprising a bushing body detachably attached to the anchor and detachably attached to the support fixture body, wherein the support fixture body is detachably fixed to a mold frame; A core portion provided in the fixing portion, and a bulging portion integrally covering the core portion and forming a concave portion in the molded product; An elastically deformable lip portion, a bush housing portion provided in the bulging portion, for housing the bush body, and an elastically deformable bush member elastically engaged with the bush body housed in the bush housing portion. Resin part with integrated part Wherein the bush body comprises: a fitting portion detachably fitted to the anchor; and an engagement receiving portion engaged with the bush engaging portion. . 2. The resin part of the support body has a plurality of cavities opening to the base end side and a rib provided between these cavities, and a lip is formed integrally with the cavities. The anchor support for a mold according to claim 1, wherein the anchor is formed so as to surround the rib portion. 3. The anchor support for a formwork according to claim 1, wherein the fitting portion of the bush body has a cylindrical shape that can be elastically deformed, and a cutout portion is formed along the axial direction. Utensils. 4. The anchor support for a formwork according to claim 1, wherein a concave portion is formed in an outer peripheral portion on a base end side of the bush body. 5. The fixing device according to claim 1, wherein the fixing portion includes a fixing receiving portion to which the external fixing device is inserted and fixed from the outside, and a stopper portion for regulating an insertion dimension of the external fixing device. 5. The anchor support for a mold according to any one of 1 to 4. 6. An anchor support for a formwork according to claim 1, further comprising a magnet attachment portion formed on the support body, and a magnet body attached to the magnet attachment portion. .