JPH08177231A - Corner clamping metal fixture - Google Patents

Abstract

PURPOSE: To reduce reinforcing work and reinforcing cost of outside corner sections of a form when a concrete construction is constructed and, at the same time, to firmly connect the outside corner sections of the form. CONSTITUTION: The central part of a rod main body 2 is bent to form the rod main body in a roughly W-shape, and projected members 5 passing through a form and drawn by a form fastener to fix and penetration stopping members 6 brought into contact with the inside of the form and keeping a specific length of straight line sections in the form are provided in the straight line sections 4 and 4 on both sides of the bent section 3. Form corner sections such as outside corner sections are continued to connect firmly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corner fastening metal fitting for fastening a corner portion of a concrete formwork.

[0002]

2. Description of the Related Art In the case of building a reinforced concrete structure, a so-called formwork method is used, in which a wooden formwork is stretched on both sides of an assembled rebar as is well known. This formwork is generally used in separators and cones in which cone members are attached to male screw portions of rods having male screws at both ends, as described, for example, in Japanese Utility Model Publication No. 54-15946. Instead, a separator with a washer member positioned by a stopper is placed between the molds, and the bolts extending from the large diameter side of the cone are passed through the mold, and the bolts that have penetrated are clamped to the mold. The metal fittings are assembled by screwing the metal fittings and fixing the metal fittings for fastening the mold to a molding frame member arranged outside the mold.

[0003]

However, in such a conventional mold assembling method using a separator, even if concrete is poured between the molds in the part between the pillars of the building, that is, in the middle part of the mold, Although the frame is not damaged or deformed, at the corners of columns and beams, which are the corners of the building, a part of the formwork often warps due to the weight of injected concrete, which If a situation arises, not only will construction work not be able to continue, but a lot of labor and time will be wasted in repairing it.

Therefore, in order to prevent the above-mentioned situation from occurring, as shown in FIG.
Form parts A formed by the separators 40, 40, and the corners of the form parts (corner parts of the form parts) are connected to the chain 41 and the turnbuckle.
The fact is that a means for reinforcing the projected corner portion by using 42 is adopted.

However, as the structure of the building becomes more complicated, the number of points to be reinforced increases, and the amount of work and time required for the reinforcing means at the corners of the chain 22 and the turnbuckle 23 are significantly increased. Is a major factor in increasing construction costs.

The present invention has been made for the purpose of reducing the work of reinforcing the projected corner portion.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by connecting the corner portions of a form from the inside with corner fittings, and the corner fittings are rods. The main body is formed in a substantially W-shape having a central portion bent, and straight portions on both sides of the bent portion which are respectively oriented in the right-angle direction from the bent portion. It is characterized in that a protrusion member that is attracted and fixed by a fastening member and a penetration stopper member that comes into contact with the inner surface of the mold to retain the predetermined length on the base side of the linear portion in the mold are provided. More preferably, the rod main body is provided with a reinforcing member having both ends fixed to the base of the straight line portion along the bent portion of the rod main body.

The rod body is formed of a single steel round bar, and its thickness is not limited to any particular value, but a diameter of about 5 to 10 mm is preferably applicable. Then, the rod is pierced through the mold provided in the straight portion of the rod body and abutted against the inner surface of the attracting portion and the mold which is attracted and fixed by the mold clamps, and the predetermined length of the straight portion on the base side is retained in the mold. As the penetration stopping member, a cone member in which a bolt extends from the large diameter side of the cone and a small diameter of which is screwed into a male screw portion formed on the tip side of the straight portion, or a straight portion similar to a conventional separator is used. It may be configured by a male screw portion formed on the tip side and various washer members fitted between the male screw portion and a stopper formed in the middle of the straight portion.

The concave portion of the bent portion of the substantially W-shaped rod main body is formed to have a size such that the reinforcing bar on the corner side in the mold can be positioned in the concave portion and the length of the straight portion to be retained in the mold. The thickness is set in advance so as to correspond to the thickness of concrete from the reinforcing bars on the corner side.

Further, in a preferred embodiment of the corner tightening metal fitting of the present invention, reinforcing members having both ends fixed to the base portion of the straight portion of the rod body are provided along the bent portion of the rod body, and when the concrete is poured in. The linear portion of the rod body does not spread at an obtuse angle due to the pressure applied to the mold.

[0011]

Operation: A hole is formed on both sides of a corner portion of a formwork assembled at a right angle, and a bolt portion extending from the inside of the formwork into a cone member screwed into the right and left straight portions of the rod body into the hole, or Insert the male screw parts at the tip of the rod body to penetrate the formwork, screw the formwork clamps from the outside of the formwork to the penetrated bolts or male screw parts, and When the corner-fastening metal fitting of the present invention is attached to the inner corner portion of the mold by the procedure of fixing to the molding frame material arranged outside the mold, the rod body of the corner-fitting metal fitting is combined with the frame. The function of firmly holding the corners of the mold at right angles and firmly prevents the opening of the projecting corner of the mold when concrete is poured, and greatly improves the work efficiency of tightening the corners of the mold compared to the conventional model. Let . Further, when the reinforcing bars on the corner side in the form are positioned in the recesses of the bending parts of the rod body, the bending parts also serve to regulate the position of the corner side reinforcing bars, and a high quality building can be constructed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings showing the embodiments of the present invention, FIGS. 1 to 12 show a corner fastening metal fitting 1 for fastening a corner portion of a concrete formwork of the present invention and a usage mode thereof. The one that is used,
The rod body 2 is formed in a substantially W shape having a straight portion 4 and 4 which are bent at the central portion and are oriented in the right angle direction from the bent portion 3 on both sides of the bent portion 3, respectively. 4, 4 and 4 are brought into contact with the inner surface of the projecting member 5 and the mold A, which penetrates the mold A and is attracted and fixed by the mold tightening metal fittings, and the predetermined length of the linear portions 4 and 4 on the base side is set in the mold. A penetration stopping member 6 for holding the structure is provided and configured.

[First Embodiment] As shown in FIGS. 1 to 3, a rod body 2 of a metal fitting 1 for corner fastening has a bent portion 3 in which a central portion is bent inward and bent portions on both sides thereof. The straight concave portions 4 and 4 that are oriented in a direction perpendicular to the portion 3 and have male screw portions 7 and 7 at the tip end thereof are substantially W-shaped, and the curved concave portion 8 of the bent portion 3 is The recess 8 is formed in such a size that the reinforcing bar on the corner side in the mold can be located. In the illustrated embodiment, the bent portion 3 of the rod body 2 has a double structure in which the reinforcing members 9 fixed at both ends to the base of the straight portion 4 along the bent portion 3 are provided side by side, and are oriented in a right angle direction. The left and right straight portions 4 and 4 are prevented from opening at an obtuse angle by an external force. A female screw portion 12 capable of screwing the male screw portion 7 of the linear portion 4 of the rod body to the small diameter portion side of the cone 11 made of synthetic resin is fitted to the linear portions 4 and 4 of the rod body 2.
A core member 14 having a bolt portion 13 extending from the large diameter side and a cone member integrated with the cone 11 is attached, and the bolt portion 13 of the cone member is used to penetrate the formwork by a formwork clamp. No protruding member 5 fixed by attraction, cone
The penetrating stop member 6 contacts the inner surface of the mold with 11 and retains the predetermined length of the linear portions 4 and 4 on the base side in the mold.

In the present embodiment, the reinforcing member 9 is fixed to the rod body 2 by winding both ends of the reinforcing member 9 around the base portion of the straight portion 4 of the rod body 2, but by other means such as welding. You may fix it.

FIG. 4 shows a state in which the corner fastening metal fitting 1 of the present invention is attached to the corner of the mold. That is, the cones are formed by punching holes on both sides of the corners of the molds A and A assembled at right angles and screwed into the left and right straight portions 4 and 4 of the rod body 2.
The bolts 13 extending from 11 are respectively inserted to penetrate the molds A and A, and the bolts 13 and 13 that are penetrated are screwed with the mold clamps 15, and the mold clamps 15 are As in the conventional case, the molding frames B and B arranged on the outer side of the mold A are fixed by pressing metal fittings 16 and nuts 17, and the molds A and A are fixedly fixed and mounted.

Although one mounting portion is shown in the drawing, it goes without saying that the corner-fastening metal fitting 1 is mounted on the corner portions of the molds A, A at a predetermined interval vertically. . Further, as shown in the figure, if the corner fastening metal fitting 1 is positioned such that the reinforcing bars C at the corners inside the form fit into the recesses 8 of the bent portion of the rod body 2, the corner fastening metal fitting 1 is more stable than the corner fastening metal fitting 1. Not only the wearing state can be obtained, but also the posture of the reinforcing bar C can be stabilized.

In the above embodiment, the rod body 2
The reinforcing member 9 is fixed together with the corner-fastening metal fitting 1, but the reinforcing member 9 is not always necessary when constructing a small-scale concrete building, as shown in FIG. Further, the object of the present invention can be achieved even if the rod body 2 is composed of only one rod.
Further, the shape of the concave portion 8 of the bent portion of the rod body 2 is an arc shape in the embodiment, but may be a triangular shape.

[Embodiment 2] FIGS. 6 and 7 show that the linear portion 4 of the W-shaped rod body 2 in the above-mentioned Embodiment 1 is extended to a length that allows the form A to penetrate therethrough. A bolt member 20 is provided to form a projecting member 5 that is attracted and fixed by a mold clamping member 15, and a stopper 21 is formed by drawing on the linear portions 4 and 4 of a predetermined length to be retained in the mold A. A washer member 22 is fitted between the stopper 21 and the bolt portion 20, and the washer member 22 is brought into contact with the inner surface of the mold A to retain a predetermined length of the linear portions 4 and 4 on the base side in the mold. The metal fitting 1 for corner fastening which is the penetration stop member 6 is shown. The corner tightening metal fitting 1 can be attracted and fixed to the mold A by the mold tightening metal fitting 15 as in the above embodiment.

[Third Embodiment] FIG. 8 and FIG. 9 show that a hemispherical cup-shaped washer member 23 is used as a washer member arranged between the bolt portion 20 and the stopper 21 of the above-described second embodiment, and is tightened in a square shape. The mode which was set as the metal fitting 1 is shown. The washer member 23 in this embodiment may have a cone shape.

[Embodiment 4] FIG. 10 shows that the linear portion 4 of the W-shaped rod body 2 is extended to have a length that allows the mold A to penetrate therethrough, and a large-diameter head 24 is provided at the tip of the extended portion. Formed,
The head 24 and the extended straight line portion 25 form a projecting member 5 attracted and fixed by the mold clamp 15 and the straight portion 4 having a predetermined length to be retained in the mold A as in the second embodiment. Stopper by drawing 4
21 is formed, a washer member 22 is fitted between the stopper 21 and the head 24, and with this washer member 22,
It shows a mode in which the corner fastening metal fitting 1 is configured as a penetration stopper member 6 that abuts on the inner surface of the mold A and retains a predetermined length on the base side of the linear portions 4 and 4 in the mold.

As shown in FIGS. 11 and 12, the means for fixing the corner fastening metal fitting 1 of the fourth embodiment to the form A is a box which is often used when fixing a conventional separator. It is good to use the metal fitting 30. That is, the head 24 of the extended linear portion 25, which is the protruding member 5 penetrating the form A, is attached to the box metal fitting.
The rod main body 2 is inserted into the groove 31 with the slope of 30 and the wedge 33 is driven by using the square bar D arranged outside the form A.
It may be fixed by pulling the straight portions 4 and 4 of the outside.

[0022]

As described above, in the corner tightening metal fitting 1 of the present invention, the rod body 2 is bent at the central portion thereof, and the straight portions 4 directed to the both sides of the bent portion 3 from the bent portion 3 at right angles.
Is formed in a substantially W shape having
And a penetrating member that abuts against the inner surface of the projecting member 5 and the form A that penetrates the form A and is attracted and fixed by the form fittings and retains the base side predetermined length of the straight part 4 in the form A. 6 is provided. For example, as in the first embodiment, the linear portions 4, 4 on both sides of the W-shaped rod body 2 are provided.
Further, a core material 14 having a female screw portion 12 into which the male screw portion 7 of the straight portion 4 of the rod body can be screwed on the small diameter portion side of the synthetic resin cone 11 and a bolt portion 13 extending from the large diameter side. A cone member integrated with the cone 11 is mounted, and the bolt portion 13 of the cone member forms a projecting member 5 which penetrates the formwork and is attracted and fixed by a formwork clamp. Construction of a concrete building using the corner fastening metal fitting 1 of the present invention, which serves as a penetration stopper member 6 that abuts on the inner surface of the frame and retains a predetermined length on the base side of the linear portions 4 and 4 in the frame. At the time of forming the form on the outside of the reinforcing bar, holes are formed on both sides of the corners of the forms A, A combined at right angles, and the bolts extending from the large diameter side of the cone 11 into the holes. Insert the parts 13 and 13 respectively to penetrate the molds A and A, and the bolts that have penetrated. With screwing the mold clamping bracket 15 from the outside 13, the mold clamping bracket 15
As shown in FIG. 4, the molds A and A are made immobile by the work of fixing them to the molding frame material B arranged outside the mold A with the press fittings 16 and the nuts 17. Moreover, it can be firmly tightened, and the opening of the mold corner portion when concrete is poured can be reliably prevented.

Therefore, unlike the conventional square tightening work using a chain and a turnbuckle, the square tightening of the form can be carried out in parallel with the work for building the form. Can be reduced and can be installed quickly,
It is possible to significantly reduce the cost of building formwork.

Further, along the bent portion 3 of the rod body 2 of the metal fitting for corner tightening, a reinforcing material 9 is provided at the base of the straight portion 4 on both ends.
In the structure provided with, the bending portion 3 of the rod main body 2 has higher strength, and even if an excessive external force is generated, it is possible to prevent the straight portion 4 that is oriented at a right angle from expanding, and the form A, A
It is possible to firmly secure the corner tightening.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a corner fastening metal fitting of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a partial cross-sectional plan view in which one cone member of the corner fastening metal fitting of FIG. 1 is separated.

FIG. 4 is a perspective view showing a usage state of the corner tightening metal fitting of FIG. 1.

FIG. 5 is a plan view showing another embodiment of the corner fastening metal fitting of the present invention.

FIG. 6 is a plan view showing another embodiment of the corner fastening fitting of the present invention.

7 is a partial cross-sectional plan view showing a usage state of the corner fastening metal fitting of FIG.

FIG. 8 is a plan view showing another embodiment of the corner fastening fitting of the present invention.

9 is a partial cross-sectional plan view showing a usage state of the corner tightening metal fitting of FIG. 8. FIG.

FIG. 10 is a plan view showing still another embodiment of the corner fastening metal fitting of the present invention.

FIG. 11 is a perspective view of a box metal fitting used for fixing the corner tightening metal fitting of FIG.

FIG. 12 is a partial cross-sectional plan view showing a usage state of the corner tightening metal fitting of FIG. 11.

FIG. 13 is a plan view showing a conventional corner tightening means.

[Explanation of symbols] 1 metal fitting for corner tightening 2 rod body 3 bent portion 4 straight portion 5 protruding member 6 penetration stop member

Claims (6)

[Claims] 1. A rod main body is formed in a substantially W shape having a central portion bent, and straight portions on both sides of the bent portion that are respectively oriented in a direction perpendicular to the bent portion. It is characterized in that it is provided with a projecting member that penetrates through the frame and is attracted and fixed by a mold clamp, and a penetration stop member that abuts the inner surface of the mold and retains a predetermined length on the base side of the straight portion in the mold. Metal fittings for corner tightening. 2. The metal fitting for corner tightening according to claim 1, wherein reinforcing members whose both ends are fixed to the base portion of the linear portion are provided along the bent portion of the rod body. 3. A mold having a predetermined length on the base side of the straight portion by contacting the inner surface of the projecting member and the mold, which penetrates through the mold provided in the straight portion of the rod body and is attracted and fixed by the mold clamp. The penetration stopping member to be retained inside is constituted by a cone member in which a bolt extends from the large diameter side of the cone and a small diameter side is screwed into a male screw portion formed on the tip side of the straight portion. The metal fitting for corner tightening according to claim 1 or 2. 4. A predetermined length of the linear portion on the base side is abutted against the inner surface of the projecting member and the mold, which penetrates through the mold provided in the linear portion of the rod body and is attracted and fixed by the mold clamp. The penetration stopping member to be retained inside is composed of a male screw portion formed on the tip side of the straight portion and a washer member fitted between the male screw portion and a stopper formed in the middle portion of the straight portion. The metal fitting for corner fastening according to claim 1 or 2, characterized in that 5. A predetermined length of the linear portion on the base side is abutted on the inner surface of the projecting member and the mold, which penetrates through the mold provided in the linear portion of the rod body and is attracted and fixed by the mold clamps. The penetration stop member to be retained inside is composed of a head having a diameter larger than that of the linear portion formed on the tip side of the linear portion and a washer member fitted between the head and a stopper formed in the intermediate portion of the linear portion. The corner tightening metal fitting according to claim 1 or 2, characterized in that. 6. The corner fitting according to claim 3, wherein the washer member has a hemispherical cup shape or a cone shape.