JPH11217878A - Structure of insert fitting and insert fitting of concrete formwork - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent toro leakage from an insert mounting portion. A boss protruding from an inner surface of a mold and fitted with an insert, a washer fixed to an outer surface of the mold, a packing provided between the outer surface of the mold and a washer, and the mold. , A boss, a washer, and a bolt that is inserted into a bolt insertion hole provided in the packing to fix them together. An annular ridge is formed around the outside of the bolt insertion hole of the packing, and the washer is inserted with a bolt. In the hole, this annular ridge is fitted and formed into a tapered tapered portion so as to be in close contact with the bolt, and an annular ridge is provided on the form contact surface of the packing so as to surround the bolt insertion hole. An annular groove is formed inside and outside the annular ridge. This prevents toro leakage, reduces dirt on the formwork and workplace, improves concrete production efficiency, and leaves no sparse traces around the insert openings in concrete products.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insert fitting for mounting an insert on a concrete form for embedding an insert into a concrete product, and to a structure of an insert mounting portion of the concrete form.

[0002]

2. Description of the Related Art Inserts are embedded in concrete products for various purposes such as lifting concrete products and connecting concrete products. Such an insert is embedded by pouring concrete into a mold and hardening the insert in a state where the insert is previously mounted on the inner surface of the mold.

[0003] In this type of insert fitting, for example, as shown in JP-A-6-81482, a boss protruding from an inner surface of a mold and a washer provided on the outer surface of the mold are fixed by bolts. Things. The insert is attached by fitting its opening to the boss.

[0004]

When concrete is put into a form during the production of a concrete product, the form is vibrated with a vibrator to spread the concrete to every corner of the form. Due to this vibration, the concrete becomes extremely fluid, and the mortar component (so-called toro) of the concrete leaks out of the formwork from the insert mounting portion. As a result, the formwork and the workplace become dirty, and cleaning of the formwork has been troublesome. In addition, due to the leakage of the toro, the moisture on the concrete surface around the insert opening of the concrete product decreases, causing a difference in concrete strength and a difference in the degree of drying, and a sparse trace remains in that portion, lowering the product value. Was.

[0005] The present invention prevents such a leak from the torsion from the insert mounting portion, reduces the contamination of the formwork and the work place, improves the efficiency of concrete production by eliminating the need for cleaning, and improves the efficiency of concrete opening. This is done so as not to leave traces of the surrounding sparse shape on the concrete product surface.

[0006]

According to the present invention, there is provided an insert mounting tool comprising: a boss protruding from an inner surface of a mold; and a boss portion to which an insert is fitted and fixed; a washer fixed to an outer surface of the mold; And a bolt provided between the washer and the washer, and a bolt that is inserted into a bolt insertion hole provided in the mold, the boss, the washer, and the packing to mutually fix them. An annular ridge is formed around the outside of the bolt insertion hole of the packing, and when this annular ridge is inserted into the bolt insertion hole of the washer and a tapered portion is formed so as to be in close contact with the bolt, the annular ridge is formed. Since the toro is prevented from passing through by closely contacting the bolt and the tapered portion, it is possible to prevent toro leakage from around the bolt.

When an annular ridge is provided on the form contact surface of the packing so as to surround the bolt insertion hole, and annular grooves are formed inside and outside the annular ridge, the annular ridge comes into close contact with the outer surface of the form. Therefore, toro leakage from between the mold and the packing can be completely prevented.

If a plurality of legs are provided on the outer periphery of the washer, the tips of which contact the outer surface of the formwork, the amount of bolt tightening becomes constant by the legs, so that the deformation of the packing becomes constant.
The packing can be prevented from being destroyed due to excessive tightening of the bolts, and the toro leakage due to insufficient tightening can be prevented.

The structure of the insert mounting portion of the concrete formwork of the present invention is such that the above-mentioned insert fitting is mounted on a formwork having a bolt insertion hole formed therein.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments of the present invention. FIG. 1 is an exploded explanatory view of the fixture 1 of the embodiment, FIG. 2 is a sectional view of a mold frame to which the fixture 1 is attached, FIG. 3 is an explanatory view of the packing 4, FIG. 4 is an explanatory view of the washer 3, and FIG. FIG. 6 is a sectional view of a mold to which the attachment 20 is attached, and FIG. 6 is an explanatory view of a boss.

The insert fixture 1 shown in FIGS. 1 and 2 comprises a boss 2, a washer 3, a packing 4, a bolt 5 and a nut 6. The boss 2 is made of metal so as to have sufficient strength, has a substantially cylindrical shape, and has a bolt insertion hole formed in the center. The outer peripheral portion has a shape corresponding to the shape of the opening of the insert 40 to be mounted.
Reference numeral 0 is mounted on the mold by fitting the boss 2 provided on the inner surface of the mold 7 so as to protrude. The washer 3 is made of resin and has a substantially disk shape. A bolt insertion hole 12 is formed at the center, and eight legs are formed at the outer periphery. In the bolt insertion hole 12,
As shown in FIG. 4, a tapered portion 13 is provided. The packing 4 is formed of an elastic body such as rubber or elastomer, has a substantially disk shape, and has a bolt insertion hole 8 formed in the center. As shown in FIG. 3, an annular ridge 9 is formed around the outside of the bolt insertion hole 8, and an annular ridge 10 is provided around the bolt insertion hole 8 on the contact surface with the formwork. An annular groove 11 is formed inside and outside the annular ridge 10.

As shown in FIG. 2, the insert fixture 1 is attached to a mold frame 7 with bolts 5 and nuts 6. A bolt insertion hole for attaching an insert fixture is provided in the corresponding portion of the formwork. As shown in the figure, the annular ridge 9 of the packing 4 is fitted into the tapered portion 13 of the washer 3, and the inner surface thereof is pressed against the outer periphery of the bolt 5, so that the inner surface thereof comes into close contact with the outer periphery of the bolt 5 and the tapered portion 13. Is prevented from passing therethrough, so that leakage of the toro from around the bolt is prevented. Further, the annular ridge 10 is pressed against the outer surface of the mold, but at this time, it is deformed inside the annular groove 11, so that the annular ridge 10 is securely brought into close contact with the outer surface of the mold and completely prevents the toro leakage from between the mold and the packing. To prevent
There is no unnatural deformation, so the packing action lasts longer.

Since the leg portion 14 of the washer 3 comes into contact with the outer surface of the formwork 7 by tightening the bolt, the amount of tightening of the bolt can be made constant, and the deformation of the packing is kept constant, and the packing is broken due to excessive tightening of the bolt. And toro leakage due to insufficient tightening can be prevented.

FIG. 2 shows a case in which a bolt insertion hole having a diameter suitable for the bolt 5 is provided in the mold frame 7, but in FIG. 5, a bolt insertion hole having a considerably larger diameter than the bolt 5 is inserted in the mold frame 7. A hole is already provided, and the insert fixture 20 utilizing the existing bolt insertion hole is shown.
A feature of the insert fitting 20 is that a convex portion 22 that fits into the bolt insertion hole of the mold frame 7 is formed on the inner surface of the packing 21. Thus, the bolt can be stably attached to the large-diameter bolt insertion hole, and the leakage of the toro can be completely prevented by the action of the annular ridges 9 and 10, as in the above-described embodiment.

FIG. 6 shows an example of a boss in which metal and resin are integrated with an adhesive or the like. The boss portions 30, 31, and 32 are all made of metal so that the base portions 30a, 31a, and 32a can obtain sufficient strength, and the tip portions 30b, 31
It is made of resin in order to improve familiarity with the inserts to be mounted by b and 32b.

[0016]

According to the present invention, since the toro leak from the insert mounting portion of the concrete formwork is prevented, dirt on the formwork and the work place is reduced, and the labor for cleaning can be reduced, and the concrete production efficiency can be reduced. Be improved. Also, since the toro leakage is prevented, no sparse traces remain around the insert opening of the concrete product.

[Brief description of the drawings]

FIG. 1 is an exploded view of an attachment 1 according to an embodiment.

FIG. 2 is a cross-sectional view of a mold to which the fixture 1 is attached.

FIG. 3 is a packing 4 showing a front side on the left side and a vertical section on the right side.
FIG.

FIG. 4 is an explanatory view of a washer 3 showing a back surface on the left side and a longitudinal section on the right side.

FIG. 5 is a cross-sectional view of a mold to which the fixture 20 is attached.

FIG. 6 is an explanatory diagram of a boss.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insert mounting tool 2 Boss part 3 Washer 4 Packing 5 Bolt 6 Nut 7 Formwork 8 Bolt insertion hole 9 Annular ridge 10 Annular ridge 11 Annular groove 12 Bolt insertion hole 13 Tapered part 14 Leg 20 Mounting fixture 21 Packing 22 Convex Part 30 Boss part 31 Boss part 32 Boss part

Claims (8)

[Claims] 1. A boss portion (2) protruding from an inner surface of a mold (7) and fitted with an insert (40), a washer (3) fixed to an outer surface of the mold (7), and a washer (3) between the outer surface of the mold (7) and the washer (3). It has a packing 4 to be provided, and a bolt 5 that is inserted into the mold frame 7, the boss portion 2, the washer 3, and a bolt insertion hole provided in the packing 4 to fix them together, and the bolt insertion hole 8 of the packing 4 is provided. An annular ridge 9 is formed on the outer periphery of the bolt, and a tapered taper portion 13 is formed in the bolt insertion hole 12 of the washer 3 so that the annular ridge 9 is fitted and closely attached to the bolt 5. Insert fixture characterized by the following: 2. A boss 2 which is provided on the inner surface of the mold 7 and is fitted with an insert 40, a washer 3 fixed to the outer surface of the mold 7, and between the outer surface of the mold 7 and the washer 3. A packing 4 provided, and a bolt 5 for inserting the bolts 5 provided in the mold 7, the boss 2, the washer 3, and the packing 4 to mutually fix them, and the form contact surface of the packing 4. Is provided with an annular ridge 10 surrounding the bolt insertion hole 8.
Characterized in that annular grooves 11 are formed on the inside and outside of the insert fitting. 3. The insert fitting according to claim 1, wherein
An insert characterized in that an annular ridge 10 is provided on the form contact surface of the packing 4 so as to surround the bolt insertion hole 8, and annular grooves 11 are formed inside and outside the annular ridge 10. Fixture 4. The insert fitting according to claim 1, wherein a plurality of legs are provided on the outer periphery of the washer, the plurality of legs having tips contacting the outer surface of the mold. 5. A boss portion 2 protruding from an inner surface of the mold 7 and fitted with an insert 40, a washer 3 fixed to an outer surface of the mold 7, and a washer 3 between the outer surface of the mold 7 and the washer 3. And a packing 4 which is fixed to the formwork 7 with a bolt 5 inserted into a bolt insertion hole provided in each of the packings 4 and has an annular ridge 9 around the outside of the bolt insertion hole 8 of the packing 4. And a tapered tapered portion 13 is formed in the bolt insertion hole 12 of the washer 3 so that the annular ridge 9 is fitted and closely adhered to the bolt 5. Structure of insert mounting part 6. A boss portion 2 protruding from an inner surface of the mold 7 and fitted with an insert 40, a washer 3 fixed to an outer surface of the mold 7, and a washer 3 between the outer surface of the mold 7 and the washer 3. And a packing 4. The packing 4 is fixed to a mold by bolts 5 inserted into bolt insertion holes provided in each of the packings. An annular ridge 10 is provided, and an annular groove 11 is formed inside and outside of the annular ridge 10. A structure of an insert mounting portion of a concrete formwork, characterized in that: 7. In the structure of the insert mounting portion according to claim 5, an annular ridge 10 is provided on the form contact surface of the packing 4 so as to surround the bolt insertion hole 8, and the inside of the annular ridge 10 and A structure of an insert mounting portion of a concrete formwork, wherein an annular groove 11 is formed on the outside. 8. The concrete structure according to claim 5, wherein a plurality of legs are provided on the outer periphery of the washer, the ends of which contact the outer surface of the formwork. Structure of insert mounting part of formwork