JPH09279694A - Insert for construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert, which can be installed simply by driving into a mounting hole formed to forms by a hammer, etc., from the outside, a member of which is manufactured comparatively simply, durability of which is improved, the number of reuse thereof is increased, and an inclined plane on the inlet side of an insert body of which after driving can also be formed and which has excellent facility. SOLUTION: An insert for construction has a mounting bolt 3 capable of being inserted into a mounting hole 7 formed to forms 6, an insert body 2, which has an anchor section 8 and a detent section 10 having a sectional shape having shapes excepting a circle and in which a female screw 11 capable of being screwed to the mounting bolt 3 is formed on the inside, and a press-contact sleeve 4, which consists of an elastically deformable material, is formed in a cylindrical shape continuing to a tapered section and has an external form, in which the diameter of the maximum diametral section of the sleeve 4 is formed in a diameter larger than the mounting hole 7 and in which the inserting section of the mounting bolt 3 is formed on the inside. The external surface of the contact-bond sleeve 4 is contact-bonded with the internal surface of the mounting hole 7 and the sleeve 4 is fixed by frictional force by pressing the contact-bond sleeve 4 into the mounting hole 7 of the forms 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction insert which is preliminarily buried in concrete as a means for attaching wall tie fittings, scaffolds, etc., mainly when constructing a concrete building. More specifically, the present invention relates to a construction insert that can be mounted by driving a mounting hole formed in a mold from the outside with a hammer or the like.

[0002]

2. Description of the Related Art For a construction insert of this type in which an insert body is mounted in a mounting hole formed in a mold and concrete is poured into the mold to bury it in a predetermined position, the insert body has been conventionally used as a mold insert. A mounting method is widely used in which a mounting bolt is screwed from the outer side of the mold through the mounting hole while being supported at a predetermined position on the inner side. However, in this conventional method, a worker who supports the insert body at a predetermined position inside the mold, and a fixing bolt that is inserted outside the mold by inserting the mounting bolt into the mounting hole formed in the mold are fixed. The workability was not good because it required two workers, a worker who worked. Therefore, various construction inserts have recently been disclosed which are improved so that they can be mounted by one operator from the outside of the mold.

For example, Japanese Utility Model Publication No. 4-6401 and Japanese Utility Model Publication No. 7-26484 use a locking member made of an elastic body having an outer shape larger than the hole diameter of a mounting hole formed in a mold. , The mounting bolt is inserted into the locking member so as to be integrated, and is elastically deformed to pass through the mounting hole, and the restoring force due to the elasticity restores the original shape after passing through the mounting hole. There is disclosed a technical means in which the insert body is fixed to the mold frame by holding the mold frame with the head side of the mounting bolt by locking the insert main body to the inner side edge part of the mold. Further, in Japanese Utility Model Laid-Open No. 7-23114, a spline-shaped projection and a locking projection are provided on the outer circumference of a sleeve that is inserted into a mounting bolt, and when the spline is inserted into a mounting hole formed in a mold, A technical means is disclosed in which the locking bolt is bited into the inner surface of the mounting hole to firmly mount the mounting bolt and fix the insert body in the mounting hole.

[0004]

By the way, in the former prior art which uses a locking member made of an elastic body, the locking member is restored to its original shape after passing through a mounting hole formed in a mold. Since it adopts a mounting structure in which it is fixed by locking it on the inner edge of the lever, it is difficult to respond to changes in the plate thickness of the formwork, and the restoring action of the elastic member is obstructed by burr in the mounting hole etc. However, there is a drawback in that a trouble that a secure locking state cannot be obtained easily occurs. Further, the latter prior art that uses the locking projection adopts a mounting structure in which the locking projection is bite into the inner surface of the mounting hole and fixed, but the projection part is sufficient to obtain a sufficient fixing effect. To make sure to bite into the inner surface of the mounting hole,
Actually, it is not so easy. On the other hand, on the other hand, there is a problem that it may be a hindrance when the sleeve is removed from the mold and reused after the mold is removed from the mold. Further, as a problem common to both the prior arts, when forming the elastic locking portion composed of a claw-shaped small piece, it is technically necessary to mold so that a sufficient elastic force can be guaranteed from the small shape. In addition to the above-mentioned drawbacks, the locking portion is easily damaged, and there are many problems in durability, and the number of reusable times is extremely low.

The present invention has been made to solve the above-mentioned problems of the prior art, and can be easily mounted by hammering from the outside into a mounting hole formed in a mold. In addition, it is relatively easy to manufacture the member, the durability is improved, the number of reuses is increased, and the inclined surface on the inlet side of the insert body after concrete pouring can be formed at the same time. The object is to provide a very good construction insert.

[0006]

In order to solve the above problems, the present invention provides at least a mounting bolt that can be inserted into a mounting hole formed in a mold, an anchor portion that can be inserted into the mounting hole, and a sectional shape. Has an anti-rotation part other than a circular shape, an insert body formed with a female screw that can be screwed into the mounting bolt, and a taper, etc. made of an elastically deformable material and having the tip side gradually formed to have a smaller diameter. And a crimp sleeve in which the diameter of the maximum diameter portion is formed to be larger than that of the mounting hole and the insertion portion of the mounting bolt is formed inward. By inserting the mounting bolt into the insertion portion of the crimp sleeve and screwing it into the female screw of the insert body to integrate the crimp sleeve into the mounting hole formed in the mold, Crimp pickpocket By crimping the outer surface of the probe to the internal surface of the mounting hole, adopting the technical means of fastening the insert body into a mold. The insertion hole of the mounting bolt formed inside the crimping sleeve may be formed by the inner ends of a plurality of ribs radially formed toward the axial center of the crimping sleeve. Further, a thin wall portion having a central opening portion having substantially the same diameter as the shaft portion outer diameter of the mounting bolt is integrally formed at the end portion of the tapered portion formed at the tip end portion of the crimping sleeve, It may be configured to more surely prevent the infiltration of the ladle. Further, by forming a vertical groove on the outer peripheral surface of the crimping sleeve, a plurality of ribs continuous with the tapered portion may be formed as an outer rib type in which the ribs are radially formed on the outer peripheral surface of the crimping sleeve.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION As a molding material for the pressure-bonding sleeve, a synthetic resin made of polyolefin such as polyethylene or polypropylene is suitable, but it may be made of hard rubber or the like. In short, when the crimping sleeve is forcibly press-fitted into the mounting hole formed in the mold by driving or the like, the outer surface of the crimping sleeve is restored by the restoring force due to the elastic deformation accompanying the reduction of the outer diameter of the crimping sleeve. Any material can be used as long as it can be pressed against the inner surface of the mounting hole to obtain a sufficient fixing force. Also, regarding the outer shape of the crimp sleeve, it is sufficient if there is at least a part of the outer diameter portion that can obtain a sufficient crimping action on the inner surface of the mounting hole when it is press-fitted into the mounting hole. The tubular portion to be formed may be cylindrical or tapered. The outer surface may be a smooth surface or an uneven surface. Furthermore, the difference between the outer diameter of the crimping sleeve and the inner diameter of the mounting hole is such that a sufficient fixing force can be obtained in consideration of the relationship with the molding material and the press fitting into the mounting hole is relatively easy. Should be selected. In that case, it goes without saying that the tapered portion has a guiding function for press-fitting into the mounting hole. Further, there is no problem in some deformation of the mounting hole due to press fitting of the crimping sleeve into the mounting hole.

For the other insert bodies and mounting bolts, those known in the art may be used. Further, it goes without saying that an appropriate washer may be used between the head of the mounting bolt and the crimping sleeve, which is in contact with the surface of the mold.
It is also possible to integrally form a flange portion instead of a washer at the rear end portion of the crimp sleeve. Furthermore, the specific shape and dimensions of the insert body may be selected as appropriate.The point is that there is an anchor part that can be inserted into the mounting hole and a rotation stop part whose cross-sectional shape is not circular and that is screwed into the mounting bolt. It can be selected as long as it is formed with possible female threads. As known in the art, the rotation preventing means may be one in which the cross-sectional shape of the shaft portion of the insert body is formed in a flat shape such as a hexagon or an ellipse. Further, it goes without saying that the detent portion and the anchor portion that form the insert body may be integrally formed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show an embodiment of the present invention. FIG. 1 is a vertical cross-sectional view showing a state in which the insert for construction is attached to a mold, and FIG. 2 is an enlarged view of a main part thereof. Also,
3 is an assembled state view of the construction insert, FIG. 4 is a vertical cross-sectional view of a crimping sleeve used in the construction insert, and FIG. 5 is a right side view showing the crimping sleeve partially broken away. . In the figure, 1 is the insert for construction, and FIG. 3 shows its assembled state. Construction insert 1
Is mainly composed of an insert body 2, a mounting bolt 3, and a crimp sleeve 4 sandwiched between them. In this embodiment, the washer 5 is interposed between the head of the mounting bolt 3 and the crimp sleeve 4, but as described above, the flange portion is integrally formed at the rear end of the crimp sleeve 4. By doing so, it is possible to replace the washer 5. As shown in FIG. 1 and FIG. 2, the male screw portions of the insert body 2 and the mounting bolt 3 are formed of a plywood 6 or the like.
The mounting hole 7 is formed so that it can be inserted therethrough.

As shown in FIGS. 1 and 2, the insert body 2 has an anchor shaft portion 9 having an anchor portion 8 which can be inserted into the mounting hole 7, and a cross-sectional shape other than circular.
In this embodiment, the rotation stopper portion 10 is formed in a hexagonal shape, and inside the rotation stopper portion 10, a female screw 11 that can be screwed into the mounting bolt 3 is formed. The male screw portion 12 of the anchor shaft portion 9 is provided at the other end portion of 11
It is configured to be integrated by screwing. After the female screw 11 and the male screw 12 are screwed together, it is desirable that the screwed portion be fixed by caulking or the like to achieve strong integration.

The pressure-bonding sleeve 4 is formed by selecting a material having an appropriate strength from an elastically deformable material such as synthetic resin such as polyethylene or polypropylene or hard rubber. As shown in FIGS. 4 and 5, the outer shape is
The tip side is formed in a tubular shape continuous with the tapered portion 13 having a gradually smaller diameter, and the diameter D of the maximum diameter portion is formed to be larger than the diameter d of the mounting hole 7. In this embodiment, the maximum diameter portion is formed so as to be biased toward the tip side, and both sides of the maximum diameter portion are formed in a gentle taper shape, and the tip portion forms the tapered portion 13. Also,
Inside the crimping sleeve 4, a plurality of ribs 14 radially formed toward the axial center portion thereof are formed, and the inner end portions of these ribs 14 allow the insertion portion 1 of the mounting bolt 3 to be inserted.
5 are formed. Further, at the end of the tapered portion 13 formed at the tip of the crimp sleeve 4, the mounting bolt 3 is attached.
Thin wall portion 1 having a central opening 16 having a diameter substantially the same as the shaft outer diameter
7 are integrally formed. The outer surface of the thin wall portion 17 is joined to the end portion of the detent portion 10 that constitutes the insert body 2 to more reliably prevent the penetration of the concrete filter into the mounting bolt 3 portion. In the present embodiment, the case where the rib 14 is formed has been described, but it is also possible to form the portion other than the insertion portion of the mounting bolt 3 in a solid shape.

Next, a method of using this embodiment will be described. As described above, first, the male screw portion 12 of the anchor shaft portion 9 is screwed into the female screw 11 formed inside the rotation preventing portion 10, and the screwed portion is fixed by caulking or the like as necessary. The insert body 2 integrated with is formed in advance. As shown in FIGS. 1 and 2, the female screw 11 of the insert body 2 is screwed with the male screw portion of the mounting bolt 3 inserted into the washer 5 and the crimping sleeve 4 so as to be integrated by tightening. Assemble the building insert 1 shown in FIG. When the building insert 1 is mounted in the mounting hole 7 formed in the form 6, the anchor is attached to the mounting hole 7 as shown in FIGS. 1 and 2 in the assembled state shown in FIG. The portion 8 and the rotation stopping portion 10 are inserted, and in this state, the pressure-bonding sleeve 4 is press-fitted into the mounting hole 7 by being driven by a hammer or the like through the head of the mounting bolt 3 to be mounted. That is, by press-fitting the crimp sleeve 4 into the mounting hole 7, the outer surface of the crimp sleeve 4 is crimped to the inner surface of the mounting hole 7, and the construction insert 1 is fixed to the mold 6 by the frictional force therebetween.

When the mounting of the building insert 1 into the predetermined mounting hole 7 of the form 6 is completed, concrete is poured as is known. After solidification of concrete,
As shown in FIG. 6, the mounting bolt 3 is loosened and the crimp sleeve 4 is removed. In this case, as shown in the figure, the tapered surface 13 of the tip of the crimping sleeve 4 simultaneously forms an inclined surface 18 on the inlet side of the insert body 2. After using the insert as a means for attaching wall tie fittings or scaffolds, etc.
As shown in FIG. 3, the plug 19 is driven into the female screw 11, the mortar or the like is filled, or the opening on the inlet side of the insert body 2 is closed by mortar finishing or the like to prevent rainwater and the like from entering.

8 to 10 show another embodiment of the crimping sleeve, which is a front view, a vertical sectional view and a left side view, respectively. The present embodiment is characterized in that a vertical groove 21 is formed on the outer peripheral surface of the crimping sleeve 20 so that a plurality of ribs 23 continuous with the tapered portion 22 are radially formed on the outer side of the crimping sleeve 20. An insertion hole 24 for the mounting bolt 3 is formed inside the crimp sleeve 20 as in the above-described embodiment. The method of using this embodiment is the same as that of the above embodiment. In the present embodiment, the vertical groove 21 has a fan-shaped cross-sectional shape and the rib 2 is formed.
Although the cross-sectional shape of 3 is set to be rectangular, the cross-sectional shape of the vertical groove 21 may be set to be rectangular and the cross-sectional shape of the rib 23 may be set to be fan-shaped.

[0015]

According to the present invention, the following effects can be obtained. (1) At least the maximum diameter portion of the crimp sleeve is
Since the peripheral surface is crimped to the inner surface of the mounting hole on the mold side, a strong and stable mounting state can be obtained by the frictional force between the two. Therefore, it can be mounted easily and surely by driving or the like. (2) Since there is no local protrusion on the outer peripheral surface of the crimping sleeve, unlike the conventional case, the insertion into the mounting hole on the mold side is extremely smooth, and there is no effect on burrs or the like in the mounting hole. Workability is improved. (3) Since the insert body is fixed by the frictional force of the outer peripheral surface of the crimping sleeve, the insert body has flexibility with respect to the plate thickness of the form, and its applicable range is wide. (4) Since the taper and other tapered portions are formed on the tip side of the crimping sleeve, the insertion into the mounting hole formed in the mold is extremely smooth, and the inclined surface on the inlet side of the insert body can be formed. . Moreover, since these functions and effects can be achieved by one member, it is easy to use. (5) Since it is fixed by crimping on the outer peripheral surface of the crimping sleeve and is not mounted through local deformation as in the past, the durability against repeated reuse is greatly improved. , The number of uses is increased. (6) Since there is no local small protrusion unlike the conventional elastic locking piece, the molding process is easy. (7) If the insertion portion of the mounting bolt is formed by the inner ends of a plurality of ribs radially formed toward the axial center portion of the crimping sleeve, the plurality of ribs supported on the outer peripheral surface of the mounting bolt can be formed. Due to the presence of the ribs, the elastic deformation of the crimping sleeve can be made uniform and the material can be saved. (8) If a thin wall portion having a central opening having a diameter substantially the same as the outer diameter of the shaft portion of the mounting bolt is integrally formed at the end of the tapered portion formed at the tip of the crimping sleeve, It is possible to more reliably prevent penetration into the mounting bolts. (9) When a plurality of ribs are formed on the outer peripheral surface of the crimping sleeve, the ribs are deformed at the time of press-fitting into the mounting hole, so that the rib easily fits with the inner surface of the mounting hole, a good mounting state is obtained, and material is saved. be able to.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a mounted state of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an assembly state diagram of the embodiment.

FIG. 4 is a vertical sectional view of a crimping sleeve used in the embodiment.

FIG. 5 is a right side view showing the pressure-bonding sleeve partially broken away.

FIG. 6 is a vertical sectional view showing a buried state of the embodiment.

FIG. 7 is a vertical cross-sectional view showing a used case of the embodiment.

FIG. 8 is a front view showing another embodiment of the crimp sleeve.

FIG. 9 is a vertical sectional view of the embodiment.

FIG. 10 is a left side view of the same embodiment.

[Explanation of symbols]

1 ... Construction insert, 2 ... Insert body, 3 ... Mounting bolt, 4 ... Crimping sleeve, 5 ... Washer, 6 ... Formwork, 7 ...
Mounting hole, 8 ... Anchor part, 9 ... Anchor shaft part, 10 ... Detent part, 11 ... Female screw, 12 ... Male screw part, 13 ... Tapered part, 14 ... Rib, 15 ... Insertion part, 16 ... Central opening part 1
7 ... Thin wall part, 18 ... Inclined surface, 19 ... Plug, 20 ... Crimping sleeve, 21 ... Vertical groove, 22 ... Tapered part, 23 ... Rib, 2
4 ... Insertion hole

Claims (4)

[Claims] 1. A mounting bolt that can be inserted into a mounting hole formed in a mold, an anchor portion that can be inserted into the mounting hole, and a rotation-stop portion having a cross-sectional shape other than circular. The insert body is formed with a female screw that can be screwed, and is made of an elastically deformable material, and the tip side is formed into a cylindrical shape that is continuous with the tapered portion with a gradually decreasing diameter. A crimp sleeve having an outer diameter formed to have a diameter larger than that of the hole, the crimp sleeve having an insertion portion for the mounting bolt formed therein, and the mounting bolt being inserted through the insertion portion of the crimp sleeve to form a female portion of the insert body. By inserting the crimp sleeve into the mounting hole formed in the mold in a state where the crimp sleeve is screwed into and integrated with each other, the outer surface of the crimp sleeve is crimped to the inner surface of the mounting hole, and thus the insert book is formed. Construction inserts that secure the body to the formwork. 2. The insertion portion of the mounting bolt formed inside the crimping sleeve is formed by inner end portions of a plurality of ribs radially formed toward the axial center of the crimping sleeve. The construction insert according to claim 1. 3. A thin wall portion having a central opening portion having substantially the same diameter as the outer diameter of the shaft portion of the mounting bolt is integrally formed at the end portion of the tapered portion formed at the tip portion of the crimping sleeve. The construction insert according to claim 1 or 2, characterized in that: 4. The construction insert according to claim 1, wherein a plurality of ribs continuous with the tapered portion are radially formed by forming a vertical groove on an outer peripheral surface of the crimping sleeve.