JP2002364171A - Enrooting metal fitting for concrete form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an enrooting metal fitting for a concrete form being easy to attach to reinforcement and capable of coping with mounting of not only separators but also a variety of other metal members, although being simple in arrangement. SOLUTION: The enrooting metal fitting for a concrete form includes: a fitting body having an approximately inverted-U-shaped integral structure formed with a pair of parallel and opposite main body parts integrated together at a base part, the fitting body having formed therein approximately U-shaped cutout parts which extend from the base part of the main body part on plan view in the overlapping direction of the pair of main body parts, and which then communicate with each other at the base part in the opening direction of the main body parts; and a wedge member inserted and driven between reinforcement and the inner surface of the base part from one end edge of the fitting body to clamp and fix the reinforcement to the fitting body, with the reinforcement to be fixed being inserted and placed at the bottoms of the cutout parts. A welding piece part for welding and fixing a part of a metallic member is formed at the base part of the fitting body by bending a metal piece part that is integral with the main body part left behind at the edge of the cutout part of the base part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art When constructing various concrete structures such as concrete walls and concrete columns, first, a concrete formwork serving as a mold is assembled, and concrete is poured into the formwork and after curing of the concrete. The formwork has been dismantled and removed. This concrete formwork is normally fixed by using a reinforcing bar projecting from the existing concrete slab, and fixing the two together by interposing a stopper metal between the reinforcing bar and the formwork. .

[0003] That is, the root stopper is fixed by sandwiching a reinforcing bar, one end of a rod-shaped or tubular separator is attached to the bracket body, and the tip of a cone screwed to the other end of the separator. Through the bolt through hole provided at a predetermined height below the formwork,
By adjusting the position of the cone so as to be a predetermined mold interval, the mold is positioned.

[0004] After this positioning, the formwork fastening bracket is screwed from the outside of the formwork into the bolt at the tip of the cone protruding from the bolt through-hole, and the formwork is fixed to the root stopper fixed to the reinforcing bar. Is done. In this manner, the molds are assembled by fixing the respective molds to the reinforcing bars via the stoppers so as to be at a predetermined interval from each other.

[0005]

Conventionally, as a fixing metal fitting, a metal fitting body has a female screw hole into which a male screw portion at one end of a separator is screwed while a metal fitting body is fixed to a reinforcing bar. The nut member is fixed by welding or the screw hole is formed directly in the bracket body,
A type in which the separator is attached by screwing a male screw portion of the separator into the screw hole has become common as a separator which can be easily mounted.

On the other hand, in assembling a concrete formwork, not only a separator but also various metal members are used.
In the conventional fixing metal fittings as described above, it can be attached only to a specific separator having a nut member welded and fixed to the metal fitting body or a male screw portion to be screwed into a directly formed screw hole. Yes, it could not respond to the attachment of other metal members.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a concrete formwork anchor which can be easily attached to a reinforcing bar and has a simple structure, but which can be used not only for a separator but also for mounting various other metal members. To provide metal fittings.

[0008]

According to a first aspect of the present invention, there is provided a concrete formwork fixing member according to the first aspect of the present invention, wherein a pair of main portions are integrally formed at a base portion and face each other in parallel with each other. A substantially U-shaped notch having a substantially inverted U-shaped integral structure and communicating with the base from the base of the main body toward the main body opening direction in a plan view in a direction in which the pair of main bodies overlap. In the state where the reinforcing bar to be fixed is inserted and mounted at the bottom of the notch, the metal bar is formed between the reinforcing bar and the inner surface of the base, and inserted and driven from one edge side of the metal bracket. A wedge member for sandwiching and fixing the rebar to the metal fitting main body, and a welding piece portion for welding and fixing a part of another metal member is provided at a base of the metal fitting main body. One part is an edge of the notch in the base. Are those formed by bending a metal piece of the remaining main body integrally with.

According to a second aspect of the present invention, there is provided a concrete formwork fixing device according to the first aspect, wherein the wedge member receives an impact from a driving tool. One longitudinal edge in contact with the inner surface of the metal fitting body forms a right angle with the tail edge to be formed, and the other longitudinal edge in contact with the reinforcing bar forms an acute angle.

[0010] According to the present invention, there is provided a rooting metal fitting for a concrete form, comprising a pair of main bodies integrally formed in a base portion and facing each other in parallel with each other. A substantially U-shaped notch portion as a portion is formed from the base toward the main body opening direction, and a reinforcing bar is inserted and placed at the bottom of the notch from the base where both notches communicate. A simple operation of inserting and driving a wedge member between the mounted reinforcing bar and the inner surface of the base of the bracket main body, clamps the reinforcing bar between the notch bottom of the bracket main body, and attaches the root stopper to the reinforcing bar. It can be easily fixed.

In the present invention, a welding piece formed by bending a metal piece integral with a main part left at the edge of the notch in the base is provided at the base of the metal fitting body. The other metal member can be attached by fixing a part to the welding fixing piece by welding.

Accordingly, not only limited parts but also various metal parts or nuts for mounting parts can be fixed to the metal fitting body as long as they can be welded to the welding piece. The stopper can be used to attach not only the separator but also various parts required for assembling the concrete formwork.

Moreover, since the welding piece can be provided by leaving a part of a metal piece cut out to form a notch portion serving as a reinforcing bar holding portion at the time of molding of the metal fitting body, it is possible to provide a separator or the like. It can be easily molded with little need for a new design or manufacturing process as a dedicated part for fixing metal parts, and has a simple configuration and low cost without increasing the size of the bracket body and increasing the number of parts. Can be manufactured.

[0014] Further, since the fixing metal fitting of the present invention which can be used in accordance with the mounting of various parts as described above can be used commonly in various situations, it is suitable for mass-production of products. It is very easy to handle, from manufacturing to storage management, transportation, and on-site use.

The structure of the metal fitting according to the present invention provided with the above-described welding piece is effective even in a case where a screw hole for screwing a predetermined separator is formed in the main body of the metal fitting body in advance. is there. That is, for example, in mounting the separator, it is possible to select whether to use the screw hole on the main body side or use the welding piece according to the situation, so that the selection range of the mounting position of the member is widened, Alternatively, a person who is desirable for assembling the mold can be appropriately selected.

Further, in the metal fitting body of the root metal fitting according to the present invention, an area on the opposite side of the base on the side where the welding piece is provided, with the cutout portion interposed therebetween can be used. That is, since various metal parts can be fixed by welding on the base surface area, for example, it is possible to attach another metal part to the welding piece and weld a nut member on the base surface to attach a separator. it can. In addition, since the mounting direction can be freely selected in almost all circumferential directions in this region, when a screw hole formed in the main body of the metal fitting body or the welding piece is used, a reinforcing bar to which the metal fitting body is fixed is used. While the separator is attached in a parallel direction, the separator can be attached in a direction perpendicular to the reinforcing bar.

Further, the wedge member of the stopper metal fitting according to the present invention is inserted between the reinforcing steel placed on the bottom of the notch and the inner surface of the base of the fitting main body to press the reinforcing steel downward. Because it is to be clamped and fixed, the shape of the wedge member is such that one long edge is inserted into the base inner surface with respect to the tail end edge to be impacted by the driving tool so that it can be inserted while being in contact with the base inner surface of the bracket main body. The shape may be such that one of the longitudinal edges that make contact is at a right angle and the other longitudinal edge that is in contact with the rebar makes an acute angle.

That is, this wedge member may have a substantially right-angled triangular planar shape when viewed from the front side (the direction in which the pair of main portions overlap). Therefore, as a configuration of such a wedge member,
It may be a metal plate having a substantially right triangle shape. However, it is preferable that the wedge member has such a shape that it is difficult for the wedge member to be displaced in the axial direction with respect to the reinforcing bar so that the fixed state is not loosened in the pressing contact with the reinforcing bar, and that both members are easily hooked.

Generally, deformed rebars having convex portions formed at a uniform pitch on the surface are often used. Therefore, the end face of the wedge member which contacts the rebar is provided between the convex portions of the rebar surface. Even if an external force along the axial direction of the reinforcing bar acts on the metal fitting body, it is desirable that the metal fitting is hooked by the convex portion so as to restrict its movement.

Even with the above-mentioned flat wedge member, the end of the longitudinal edge in contact with the reinforcing bar may catch on the convex portion of the reinforcing bar surface. Is required. Or
The wedge member is formed in an inverted U shape forming a pair of reinforcing bar pressing portions facing each other in a side cross-sectional shape so as to fit inside the base portion of the fitting body, and the open side edges of the pair of reinforcing bar pressing portions are formed. A configuration that presses a reinforcing bar is preferable. in this case,
If the interval between the two reinforcing bar pressing portions is set to an appropriate distance according to the pitch of the convex portions of the reinforcing bars, the open side ends of both the pressing portions are each brought into contact with the reinforcing bar convex at a predetermined position as the wedge member is inserted and driven. It falls into the concave part between the parts, and in the sandwiching fixed state, the convex part and the open side end of the reinforcing bar pressing part are hooked to each other,
The movement of the metal fitting body with respect to the reinforcing steel is restricted, and the stopper metal is prevented from loosening and coming off the reinforcing steel. This instant section reverse U
The W-shaped wedge member can be easily manufactured in a single step by press working from a metal flat plate having a predetermined shape similarly to the metal fitting body.

The main body of the metal fitting except for the welding piece has a symmetrical shape in which a notch is located at the center of the pair of main parts in a plan view in a direction in which the pair of main parts overlap. More desirably, the wedge member can be inserted and driven from either side edge of the main body. Thereby, the worker can drive the wedge member from the direction in which the work is easy according to the situation of the metal fitting fixing portion of the reinforcing bar,
The work of fixing the fixing metal to the reinforcing bar becomes easy.

For a reinforcing bar having a different diameter, the length of the tail edge of the wedge member which receives the driving impact can be changed to change the acute angle of the longitudinal edge on the side in contact with the reinforcing bar with the fitting. The main body can be made of the same shape. For example, at present, two types of rebar having an outer diameter of 13 mm and 16 mm are generally widely used, and two types of wedge members having different tail end lengths are prepared in advance for both types of rebar. You should do it.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 1 is a schematic perspective view showing the entire configuration of the stopper metal according to the present embodiment. FIG. 2 is a schematic configuration diagram showing a state in which a reinforcing bar is clamped and fixed by the stopper metal of FIG. 1. FIG. 4B is a side view, and FIG.

The anchor according to the present embodiment mainly includes a base 1
A metal body 10 having a substantially inverted U-shaped integral structure forming a pair of main bodies 2 which are integrated and face each other in parallel.
And a substantially inverted U-shaped wedge member 6 formed with a pair of reinforcing bar pressing portions 7 facing in parallel with each other in a side sectional shape smaller than the internal shape of the base 1 of the metal fitting body.

The pair of main parts 2 of the metal fitting body 10 include:
A substantially U-shaped notch 3 communicating with the base 1 from the base 1 of the main body toward the main body opening direction in a plan view in a direction in which the main bodies overlap with each other is formed as a reinforcing-bar holding portion. At the edge of the notch 3 in the base 1, a metal piece 4 integral with the main body is left.
However, it constitutes a welding piece for welding and fixing a part of another metal member in a state of being bent outward so that the reinforcing bar 20 can be inserted from the communication portion of the notch portion 3 to the bottom side. .

In the metal fitting body 10, the reinforcing bar 20 to be fixed is provided at the bottom of the notch 3 between the two main portions.
Or the bottom of the notch 3 with respect to the reinforcing bar 20 when the target reinforcing bar 20 is already fixed to a foundation of a concrete structure or the like. After the metal fitting body 10 is put on the base, the reinforcing bar 20 and the base 1 of the metal fitting body are brought into contact with each other.
By inserting and driving the wedge member 6 from one end edge side of the metal fitting body 1 to the inner surface of the metal body 1, the reinforcing bar 20 is pressed toward the bottom side of the notch 3 as shown in FIG. It is sandwiched and fixed between the member 6.

In this embodiment, the outer shape of the metal fitting body 10 excluding the welding piece portion (metal piece portion) 4 is shown in a plan view in the direction in which the pair of main portions 2 overlap (a front view in FIG. 2B). )
The notch 3 has a left-right symmetrical shape located at the center of the pair of main bodies 2 so that the wedge member 6 can be inserted and driven from either side of the metal fitting main body 10.
With this configuration, the worker can easily work from the wedge member 6
Can be fixed, so that the fixing work of the fixing metal fitting 10 to the reinforcing bar 20 becomes easier.

Further, in the present embodiment, the wedge member 6 has a pair of reinforcing bar pressing portions 7 facing each other in parallel with each other in a substantially inverted U-shape in cross section, and a plan view of the reinforcing bar pressing portions 7 in the overlapping direction. Then, one longitudinal edge that contacts the inner surface of the base of the metal fitting body 1 is perpendicular to the tail edge to be impacted at the time of driving, and the other longitudinal edge that contacts the reinforcing bar 20, that is, the open side edge of the reinforcing bar pressing portion 7. Have an approximately right triangle shape forming an acute angle.

The wedge member 6 is configured so that it can be more firmly held and fixed to a deformed reinforcing bar having a convex portion 21 formed on the surface. As shown in the side view of FIG. 2A and the front view of FIG. 2B, each of the open-side ends of the pair of reinforcing bar pressing portions 7 of the wedge member 6 which face in parallel with each other is brought into contact with the driving. Then, it falls into the concave portion between the convex portions 21 on the surface of the reinforcing bar, and enters the clamped state while being fitted into the concave portion. Therefore, the end portions of the pair of reinforcing bar pressing portions 7 pressing the reinforcing bars 20 are close to the convex portions 21 even when an external force acts in the reinforcing bar axial direction.
, The movement of the wedge member 6 is restricted, so that the holding and fixing is firmly maintained. Such an effect also occurs on the metal fitting body 1 side, and the bottom of the notch 3 is caught by the convex portion 21 on the reinforcing bar surface, and it is difficult to shift the metal fitting body 10 in the axial direction of the reinforcing bar.

In the metal fitting of this embodiment, the separator 30 can be attached to the metal fitting body 10 by welding and fixing one end of the separator 30 to the welding piece 4. Further, the female screw hole 5 is formed in advance in the pair of main body portions 2, and the separator 30 which has been subjected to male screw processing and screwed into the female screw hole 5 is screwed to attach the separator 30 to the main body portion 2. be able to. Thereby, the selection range of the attachment portion of the separator 30 is widened, and the more convenient one can be used in assembling and workability of the concrete formwork.

When the separator 30 is attached to the welding piece 4, the method is not limited to the method of directly fixing the separator 30 by welding. As shown in FIG. 3, the nut member 31 with which the externally threaded portion of the separator 30 is screwed is used. Can be fixed by welding to the welding piece 4 and the separator 30 can be screwed into the nut member 31.

As described above, the welding piece 4 is not limited to the separator 4, and various members can be attached to the metal fitting body 10 as long as they can be welded. In addition, it is possible to cope with attachment of various parts such as metal parts used in assembling a concrete formwork.

Further, the welding piece 4 is connected to the metal fitting body 10.
Can be provided by a simple process of leaving a part of a metal piece to be cut out to form a notch 3 serving as a holding portion of a reinforcing bar when molding a metal. It can be easily molded with little need for a simple design and manufacturing process.
It has a simple configuration without increasing the size and the number of parts, and can be manufactured at low cost.

Further, in the present root stopper, the base 1 of the metal fitting body 10 has a base surface area 1b opposite to the side where the welding piece 4 is provided, with the notch 3 interposed therebetween. Can also be used. That is, since various metal parts can be welded and fixed on the base surface region 1b, the nut member 3 is provided on the surface of the base surface region 1b as shown in FIG.
1 can be welded and the separator 30 can be attached. Moreover, in this region, the mounting direction is the welding piece 4.
Can be freely selected in almost the entire circumferential direction except for a small area that abuts against the reinforcing bar 20 when the screw hole 5 formed in the main body 2 of the metal fitting body 10 or the welding piece 4 is used. The separator 30 can be mounted in the direction perpendicular to the reinforcing bar 20 while the separator 30 can be mounted. Thus, not only are there many choices for the mounting site of the separator 30, but also the mounting direction can be appropriately selected.

As described above, the present stoppers which can be used in accordance with the mounting of various parts are suitable for mass production of products because the brackets themselves can be commonly used in various situations. It is very easy to handle during transport and on-site use.

[0036]

As described above, according to the rooting metal fittings for concrete formwork of the present invention, while being easily and easily mounted on a reinforcing bar, it is applicable not only to separators but also to various metal members. There is an effect that can be.

Further, since it can be widely used as a member mounting bracket with a small number of parts, it is suitable for mass production.
Products can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing the entire structure of a concrete formwork root stopper according to an embodiment of the present invention;
(A) is a state before mounting the reinforcing bar and the separator,
(B) It is a schematic block diagram which shows the attachment state of a reinforcing bar and a separator, respectively.

FIGS. 2A and 2B are schematic configuration diagrams showing a state in which a reinforcing bar is clamped and fixed by a stopper metal of FIG. 1, wherein FIG. 2A is a side view and FIG.

FIG. 3 is a schematic perspective view showing a fixing state of a reinforcing bar and a nut member for attaching a separator of the root stopper according to the present embodiment.

FIG. 4 is a schematic perspective view showing another state of attachment of the separator in the stopper according to the embodiment.

[Explanation of symbols]

 1: Base part of metal fitting body 1b: Base area 2: Main part 3: Notch part 4: Welding piece part 5: Female screw hole 6: Wedge member 7: Reinforcing bar holding part 10: Metal fitting body 20: Reinforcing bar 21: Convex part 30 : Separator 31: Nut member

 ──────────────────────────────────────────────────続 き Continuing from the front page (71) Applicant 501064804 Nakamura Tekko Co., Ltd. 309-5 Ino, Omi-cho, Umi-cho, Kasuya-gun, Fukuoka Prefecture 72) Inventor Seizo Onishi 322 No. 2 Futatsuka, Takaoka-shi, Toyama F-term in Takagi Seiko Co., Ltd. (Reference) 2E177 KB04 KC02

Claims (2)

[Claims] 1. A base having a substantially inverted U-shape integral structure in which a pair of main portions are formed integrally and face each other in parallel to each other, and the base portion of the main portion in a plan view in a direction in which the pair of main portions overlap. A metal body having a substantially U-shaped notch communicating with the base toward the opening direction of the main body, and a reinforcing bar to be fixed being inserted and placed at the bottom of the notch. A wedge member inserted and driven from one edge side of the metal fitting body between the reinforcing bar and the inner surface of the base to pinch and fix the reinforcing steel to the metal fitting body; and a base of the metal fitting body, A welding piece portion for fixing a part by welding is provided, and the welding piece portion is formed by bending a metal piece portion integral with the main body portion left at the edge of the notch portion in the base portion. Concrete formwork characterized by being formed Root fastener. 2. The wedge member has one longitudinal edge in contact with the inner surface of the metal fitting body at a right angle with respect to a tail edge to be subjected to impact by a driving tool, and the other longitudinal edge in contact with a reinforcing bar forms an acute angle. The metal fitting for a concrete formwork according to claim 1, wherein: