JP2003147905A - Covering thickness regulating fittings for reinforcing bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a covering thickness regulating fittings for a reinforcing bar having a novel structure capable of supporting a form with high strength. SOLUTION: This thickness regulating fitting for a reinforcing bar is so constructed that the base end of a steel bar is taken as a positioning base end part 21, the positioning base end part is continuously extended to form a stable fixing part 2, and a covering thickness securing part 3 is formed at the tip of the stable fixing part 2.

Description

Detailed Description of the Invention

[0001]

An object of the present invention is to provide a metal fitting for a spacer that enables accurate and easy control of the covering thickness of a reinforced concrete construction, and in particular, can be installed and installed in parallel with the reinforcing work. It is intended to provide a cover thickness regulating metal fitting for a reinforcing bar having a novel structure that can streamline the work of assembling the formwork, can be manufactured at low cost, and can support the formwork with high strength. is there.

[0002]

2. Description of the Related Art When constructing a reinforced concrete structure, the reinforcement work and the formwork work depend on the structural part of the building.
For example, in the pillar part, the procedure is to assemble the formwork after assembling the rebar, and in the case of the floor slab and the beam part, the procedure is to assemble the formwork after assembling the formwork, and in the wall part, the inner formwork is assembled. Since the work procedure is repeated before and after, such as reassembling the rebar and then assembling the outer formwork, the bar arrangement worker and the formworker are always closely connected. Although it is necessary to proceed with work while doing so, it is not rare that it must be done simultaneously and in parallel, and it was difficult to easily rationalize the construction procedures.

On the other hand, in recent construction standards for concrete structures, the use of synthetic resin moldings for each part of the members tends to be restricted in consideration of pollution control and finiteness of petroleum resources. Regarding spacer fittings that are often used for assembling to control concrete cover thickness, administrative guidance has come to be made to suppress the use of synthetic resin molded products as much as possible from the past,
In particular, according to the construction manuals for public facilities, the use of synthetic resin moldings as spacer fittings is almost forbidden.

Further, the spacer fittings that have been generally used so far are, for example, Japanese Patent Laid-Open No. 2000-32871.
A disk type of synthetic resin such as the invention disclosed in Japanese Patent No. 9 or a star-shaped rectangular plate shape of synthetic resin, as in the invention disclosed in Japanese Patent Laid-Open No. 11-50598. For example, various things have been developed as synthetic resin molded products and many have already been put into practical use, but they are a ramen structure, a wall type structure, a beamless structure, a curved surface structure, And even if it can be used for buildings such as other special concrete structures, it becomes unusable due to insufficient strength when constructing civil engineering facilities such as bridges, sluices, slopes, tunnels, etc. In reality, it is necessary to prepare metal spacer fittings that can provide sufficient strength, and the formworker had to prepare various spacer fittings according to the construction site.

As described above, according to the present invention, the conventional spacer made of synthetic resin may become unusable depending on the construction site, and even if it is a site where provisional decree can be used, a large number of spacers are used due to its material strength. In view of the fact that it has been a problem for formworkers because it has the drawback of requiring installation of a machine, requiring a lot of time and labor for mounting work, and increasing costs, etc. In addition to enabling parallel work, the strength and strength of the product are guaranteed and the installation work is improved.
From the judgment that it is impossible to realize spacer fittings that are not synthetic resin molded products that are becoming more and more recent than anything else, we quickly started development and research, long-term trial and error, and numerous trial manufacture, As a result of repeating the experiment,
This time, we have finally succeeded in realizing a cover thickness control metal fitting for a reinforcing bar having a novel structure, and the configuration will be described in detail below together with an embodiment representative of the present invention shown in the drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As will be clearly understood from the embodiments representative of the present invention shown in the drawings, the cover thickness regulating metal fitting for a reinforcing bar included in the present invention basically has the following construction. There is. That is, the base end side of the steel bar is a positioning base end part capable of being attached by winding an annealed iron wire on at least one of the vertical bar and the horizontal bar, and one of the positioning base ends is The portion that is continuously stretched to the end side is bent and deformed so as to include a shape that can be arranged in a cross shape with respect to at least one of the other vertical streak or the horizontal streak located on the outermost side, and the stable fixing portion is formed. In addition, the side of the stable fixing portion, which is not the above-mentioned positioning base end portion side, is projected and extended to the concrete covering thickness side by an amount capable of ensuring a predetermined covering thickness, and is formed as a covering thickness securing portion. A cover thickness regulating metal fitting for a reinforcing bar having the above-mentioned configuration.

If the covering thickness control metal fittings for reinforcing bars having this basic structure are expressed in different expressions, the base end side of a steel bar is wrapped around at least one of the vertical bars and the horizontal bars with an annealed iron wire. The positioning base end part that can be attached by means of at least one of the other longitudinal streaks or the horizontal streaks located on the outermost side is a part that is continuously extended to one end side of the positioning base end part. Bend and deform so as to include a shape that can be crossed to form a stable fixing part, and secure a predetermined covering thickness on the side of the stable fixing part that is not the base end side of the previous positioning. The overburden thickness for the reinforcing bar, which is constructed by forming the overburden thickness securing portion that allows the annealed iron wire to be attached by wrapping, if necessary, while projecting and extending to the concrete overburden side. It can be said that it is a metal fitting.

Further, in other words, the base end side of the steel bar is a positioning base end part capable of being attached to at least one of the longitudinal bar and the lateral bar by winding annealed iron wire. In addition, the positioning base end portion includes a shape in which a portion that is continuously extended to one end side can be arranged in a cross shape with respect to at least one of the other longitudinal streaks or the lateral streaks located at the outermost side. In this way, a stable fixing part that bends and deforms so as to resist the pressing force from the concrete covering thickness side in cooperation with the positioning base end part, A cover thickness securing part that allows the side that is not the end part to protrude and extend to the concrete cover thickness side by the amount that can secure a predetermined cover thickness, and also enables attachment by winding annealed iron wire as needed. It is a cover thickness control metal fitting for reinforcing bars that is configured by It can also be.

More specifically, the base end side of a steel bar having a predetermined length can be attached to at least one of the vertical bars and the horizontal bars by winding an annealed iron wire on the base end side. So that the portion that is continuously extended to one end side of the positioning base end portion can be arranged in a cross shape with respect to at least one of the other longitudinal streak or lateral streak located at the outermost side. The stable fixing part is formed by bending and deforming into a substantially U-shape that can be arranged in parallel with respect to at least one of a pair of vertical stripes or horizontal stripes arranged in parallel at a predetermined interval. In the above-mentioned positioning, the side that is not the base end side protrudes toward the concrete covering thickness side by the amount that can secure a predetermined covering thickness, and is stretched to form the covering thickness ensuring portion. It can be said that it is a metal fitting.

Further, the base end side of a steel bar having a predetermined length is substantially orthogonal to the corners formed by at least one of a plurality of vertical bars or horizontal bars arranged in parallel. Can be attached in a substantially L-shape to form a positioning base end portion that can be attached by winding annealed iron wire, and continuously form one end side of the positioning base end portion. The stretched part,
The stable fixing part is bent and deformed so as to include a shape that can be crossed with at least one of the other vertical streak or the lateral streak located on the outermost side, and then the stable fixing part is positioned at the previous position. A cover thickness regulating metal fitting for a reinforcing bar having a structure in which the side other than the base end side is projected to the concrete cover thickness side by an amount capable of ensuring a predetermined cover thickness and extended to form a cover thickness securing portion is included. .

Similarly, the base end side of a steel bar having a predetermined length can be arranged parallel to one horizontal bar, and is U-shaped so as to wrap around either above or below the horizontal bar. A positioning base end that can be bent and stretched to engage with a plurality of adjacent vertical bars located on the side opposite to the concrete covering thickness side and can be attached by winding annealed iron wire. And a portion that is continuously stretched to one end side of the positioning base end portion is bent and deformed so as to include a shape that can be arranged in a cross shape with respect to the outermost vertical muscle. As a stable fixing part, and the side of the stable fixing part that is not the base end side of the previous positioning is projected and extended to the concrete covering thickness side by an amount that can secure a predetermined covering thickness, and a covering thickness securing part is provided. At the side of the concrete formwork, Since the thickness of the concrete securing layer is formed in an arc shape centered on the base of the thickness securing part, the diameter of the vertical bar attached to the positioning base end is different, so that the covering thickness is secured. It also includes a cover thickness regulating metal fitting for a reinforcing bar, which is configured to ensure a constant cover thickness dimension even when the tip of the part has moved in a substantially vertical direction.

Further, the base end side of a steel bar having a predetermined length can be installed in parallel with one vertical bar, and can be arranged in parallel with a horizontal bar crossing the vertical bar. Bend and stretch into a
At least one of the longitudinal bar and the horizontal bar was made into a positioning base end portion capable of being attached by winding an annealed iron wire, and was continuously stretched to one end side of the positioning base end portion. The part is bent and deformed so as to include a shape that can be arranged in a cross shape with respect to the lateral muscle located on the outermost side to form a stable fixing part, and the stable fixing part is not on the side of the positioning base end. The side is projected to the concrete cover thickness side by an amount that can secure a predetermined cover thickness and is extended to form a cover thickness securing portion, and at least the plane shape of the tip contacting the concrete formwork ensures the cover thickness. Since the diameter of the horizontal bar that attaches the positioning base end is different, the tip of the cover thickness ensuring part is If you have moved in a substantially horizontal direction Encompasses the thickness regulating bracket suffer for rebar was to be able to ensure a constant fog thickness dimensions me.

Similarly, the base end side of a steel bar having a predetermined length is folded back in parallel at the substantially central portion, and a pair of parallel base end sides is attached so as to sandwich at least one of the vertical bar and the horizontal bar. It is possible to make the positioning base end part that can be attached by winding an annealed iron wire on at least one of the vertical bar and the horizontal bar, and place the steel bar at the proper position near the center to the outermost side. A stable fixing portion is formed by bending and deforming so as to include a shape that can be arranged in a cross shape with respect to at least one of the other vertical streaks or the horizontal streaks located therein, and at the stable fixing portion, the positioning base end part is located. A cover thickness regulating metal fitting for a reinforcing bar is also included, in which a side other than the side is projected to the concrete cover thickness side by an amount capable of ensuring a predetermined cover thickness and extended to form a cover thickness ensuring portion.

The locating base end can be joined to at least one of the vertical streak and the horizontal streak when determining the metal fitting disposition position of the present invention, and any suitable position of the joints,
It has a function of being able to be attached and fixed to at least one of the vertical bar and the horizontal bar joined by winding of annealed iron wire, and a part of the base end side of the steel bar may be straight or bent, It must be formed in a curved appropriate shape, and it must be formed in a straight line that can be joined in parallel to only one of the vertical or horizontal lines, or it must be located at the intersection of the vertical and horizontal lines. Then, it can be placed in parallel with either the vertical line or horizontal line and in parallel with the other vertical line or horizontal line, or in parallel with a predetermined interval. It is possible to form a linear shape that can be attached to either one of a plurality of vertical bars or horizontal bars installed in the direction of the reinforcing bars in a direction substantially orthogonal to the axis of these reinforcing bars.

The stable fixing portion is a positioning base end portion that can be attached to at least one of the vertical bar and the horizontal bar by winding an annealed iron wire, and is continuous with the positioning base end, and is suitable. With the portion stretched to have a shape, the overburden thickness ensuring portion on the distal end side is supported so as to ensure an accurate overburden thickness dimension, and in combination with the above positioning base end portion, the metal fitting of the present invention It has a function to prevent the sticking, movement, separation, etc., of the positioning base end, for example, by forming the extending portion from the positioning base end into an L-shape and forming the positioning base end by a vertical stripe. As parallel to either one of the horizontal stripes and attached so that the bent extension part is parallel to the other of the crossed vertical stripes or horizontal stripes, or as a U-shaped bent piece The positioning base end portions formed in parallel with each other and the extending portion are It shall be placed in parallel with a pair of rebars of either vertical or horizontal bars installed in parallel, and either the vertical bar or the horizontal bar located behind the pair of rebars in a cross shape or the concrete on the other side. It is possible to have a shape that can be engaged from the overburden side.

The cover thickness securing section is attached to both or both of the vertical streak and the horizontal streak installed via the stable fixing section, and the installation position of the concrete formwork is determined by the concrete cover thickness. It has a function that can be regulated to match the dimensions, and it must have a structure with sufficient strength to support against the pressing force at the time of installing the concrete formwork, and productivity should be improved. If you consider it, by bending one bar steel such as one round steel bar or deformed bar steel of a predetermined size,
The stable fixing portion is formed so as to be integrally formed by continuously extending from one end side, and the tip contacting the concrete formwork is provided with J, L, It may be folded back into a U or V shape to make the smooth outer peripheral surface of the steel bar contact the concrete form, or the tip exposed from the concrete surface after casting may be covered with a rust-proof coating, or a resin. It may be provided with a rust preventive part such as a component attached.

The rust preventive portion may be formed by closely coating and forming a relatively thin synthetic resin film on a predetermined range of the tip thickness side of the overburden thickness ensuring portion which is in contact with the concrete formwork. At the tip that contacts the concrete formwork of the part, it is made of a relatively hard synthetic resin and the tip is formed into a spherical shape with an arbitrary radius, or a spherical shape with a radius almost the same as the concrete covering thickness dimension, and at the base part A head attachment part that consists of an abutting head that is formed with a female screw hole or a connecting hole with a diameter slightly smaller than the steel bar tip, and is a male screw engraved on the steel bar tip or the steel bar tip itself It can also be realized by detachably screwing, integrally or by press-fitting. Hereinafter, the structure of the present invention will be described in detail together with the representative embodiments of the present invention shown in the drawings.

[0018]

[Embodiment 1] Shown in a perspective view of a cover thickness regulating metal fitting for a reinforcing bar in FIG. 1, a sectional view of a rust preventive portion in FIG. 2, a perspective view in an attached state in FIG. 3, and a side view in an attached state in FIG. In the case described above, the base end side of a round steel bar having a predetermined length is bent in a U shape to form a stable fixing portion, and the tip end portion is V-shaped on one end side continuous with the stable fixing portion.
A typical example of a covering thickness regulating metal fitting for a reinforcing bar included in the present invention, which has a basic structure in which a rust preventive portion coated with a synthetic resin film is bent and stretched after being bent into a mold shape It is shown.

The covering thickness regulating metal fitting 1 for a reinforcing bar has a hoop bar 5, 5 as two parallel horizontal bars which cross a base end side of a round bar steel having a predetermined length with a main bar 4 which is a vertical bar. Each of them is bent into a U-shape that can be attached in parallel, and can be attached to the hoop muscles 5 and 5 by winding the annealed iron wire 6 on the base 2
1 is formed, and the U-shaped parallel portion of the positioning base end portion 21 thereof is used as a stable fixing portion 2 that can come into contact with the main muscle 4 that intersects the hoop muscles 5 and 5. Part 2
The tip end side, which is not the base end portion 21 side, is bent and extended in a substantially vertical shape with respect to the U-shaped stable fixing portion 2, and the tip end is folded back into a V-shape, and a synthetic resin coating is used. The covered rust preventive portion 31 is formed, and the covering thickness ensuring portion 3 has a structure in which the length dimension from the root portion to the tip portion is set to match the concrete covering thickness D.

[0020]

[Embodiment 2] In the case shown in the perspective view of the covering thickness regulating metal fitting for reinforcing bars in FIG. 5 and the perspective view of the attached state in FIG. 6, the base end side of one round bar steel having a predetermined length is installed in parallel. A linear positioning base end portion 21 is formed by a dimension that can be passed over the plurality of formed hoop muscles 5, 5, ..., and the middle portion of the positioning base end portion 21 on the distal end side is substantially formed. Bend it to a 90 ° angle,
Further, an L-shaped stable fixing portion 2 is formed by linearly extending a dimension that can be passed over between a plurality of hoop muscles 5, 5, ... Installed in parallel to a direction forming an angle of 90 °. To form.

Then, one end side of the stable fixing portion 2 is bent so as to be parallel to the positioning base end portion 21 and further stretched into a straight rod shape having a dimension less than the covering thickness dimension to secure the covering thickness securing portion. 3 is formed, a male screw portion is engraved on the outer peripheral surface of the steel bar tip portion of the overburden thickness ensuring portion 3, and the tip is made spherical and a female screw hole is bored on the base end side. The rust preventive portion 31 composed of the contact head is screwed and mounted, and the dimension D of the cover thickness ensuring portion 3 including the rust preventive portion 31 is set to a desired concrete cover thickness dimension. It is the covering thickness control metal fitting 1 for the reinforcing bars.

[0022]

[Third Embodiment] The case shown in FIG. 7 is a perspective view of a cover thickness regulating metal fitting for reinforcing bars, a cross-sectional view of a rust preventive portion of FIG. 8, a perspective view of a mounted state of FIG. 9, and a side view of a mounted state of FIG. A position where the base end side of one steel bar of a predetermined length is formed in a straight line in a substantially horizontal contact with the side opposite to the concrete covering thickness side of the two main bars 4 and 4 standing upright at a predetermined interval. In addition to the take-up base end 21, the one end side intermediate part continuous to the position taking base end 21 surrounds the outer periphery of the main bar 4 arranged on the front right side of the two main bars 4, 4 in a downward slope. To form a horizontal straight line that can be attached along the upper side of the stirrup bar 5, which is installed on the concrete-covered thickness side of the main bars 4 and 4, and has two The stable fixing portion 2 is formed by stretching to an arbitrary intermediate position between the main bars 4 and 4.

Then, the stable fixing portion 2 is projected and extended in a straight line of the concrete covering thickness dimension D toward the concrete covering thickness side, and the projecting end thereof is further extended from the base end portion continuous to the stable fixing portion 2 to the concrete. The covering thickness securing portion 3 is formed by curving in a downward arc shape around a horizontal axis having a covering thickness dimension D as a radius, and the tip side including the curved portion of the covering thickness securing portion 3 in the arc shape. The predetermined range is covered with a synthetic resin thin film and is hermetically sealed to form the rust preventive portion 31.

The arcuately curved tip of the overburden thickness ensuring portion 3 is curved into a shape capable of ensuring a constant concrete overburden thickness even when the axial center of the overburden thickness ensuring portion 3 moves up and down to some extent,
It suffices if it is formed, and therefore, the horizontal cross-sectional shape may be an arc type around the horizontal axis centering on the concrete covering thickness dimension D as a radius, and an arc having the same upward curvature. It can also be formed in a mold.

Further, as in the case shown in the perspective view of the covering thickness regulating metal fitting for reinforcing bar of FIG. 11, the perspective view of the mounted state of FIG. 12, and the side view of the mounted state of FIG.
The base end of 1 is bent and extended so that it can be engaged with the main bar 4 on the right side of the front, and the middle part of the stable fixing part 2 that goes around the outer periphery of the main bar 4 on the left side of the front with a downward slope is approximately two. Formed by bending at a bending angle of ゜, and cut into a shorter length than the concrete covering thickness dimension D of the covering thickness securing portion 3, a male screw portion is engraved around the tip of the round steel bar. On the other hand, a female screw that is made of synthetic resin and has a spherical tip with a concrete covering thickness dimension with a radius of curvature as the radius of curvature, and can be screwed into the male threaded portion in the grooved fitting hole formed in the base portion. Dimensions of the covering thickness securing portion 3 including the rust preventive portion 31 by screwing the rust preventive portion 31 formed of the contact head into which the fastener 32 with a collar having a hole formed therein is undetachably fitted and attached. Can be set to match the concrete cover thickness D.

[0026]

[Embodiment 4] A perspective view of a cover thickness regulating metal fitting for a reinforcing bar in FIG.
In the case shown in the perspective view of the mounted state of FIG. 15 and the plan view of the mounted state of FIG. 16, the base end side of one round bar steel having a predetermined length is
Vertical bar-shaped positioning base end 2 that can be mounted along the main bar 4
1, the steel bar midway portion following the positioning base end portion 21 crosses the main bar 4 in contact with the concrete covering thickness side outer peripheral wall, the upper outer peripheral surface of the stirrup bar 5, from the side opposite to the concrete covering thickness side, It shall be horizontally foldable so that it can be hung so that it can be slanted over the concrete cover thickness side.

Further, the middle portion of the steel bar tip side is bent vertically downward to form a stable fixing portion 2 so that it can be hooked on the side surface of the stirrup bar 5 on the concrete covering thickness side, and then the stable fixing portion 2
One end side of the is projected and extended toward the concrete covering thickness side, and at the tip end thereof, a tip end surface is formed into a spherical mold having a concrete covering thickness dimension D as a radius, and a round bar steel diameter is provided at the base portion. Rust-proof portion 31 having a slightly smaller diameter than the attachment hole is press-fitted and fixed through the attachment hole, and the dimension from the base end to the spherical surface of rust-preventing portion 31 is measured with concrete. The overburden thickness ensuring portion 3 having the same overburden thickness D is formed.

[0028]

[Embodiment 5] A perspective view of a cover thickness regulating metal fitting for a reinforcing bar in FIG.
In the case shown in the perspective view of the attached state of FIG. 18, one steel bar having a predetermined length is bent in a folded shape at a substantially central portion, and a predetermined dimension on both end sides is an interval at which the main bar 4 can be sandwiched from the left and right sides. The positioning base end portions 21 and 21 are formed to be parallel to each other by separating the positioning base end portions 21 and 21.
The horizontal concrete is arranged so that the base end of 21 is directed to the upper side, and the midway part of the tip side directed to the lower side is in contact with the upper outer peripheral surface of the stirrup bar 5 which intersects with the outer peripheral surface of the main reinforcement 4 on the concrete covering thickness side. It shall be bent toward the thick side.

Further, by forming a shape that is bent substantially vertically downward so as to contact the outer peripheral surface of the stirrup bar 5 on the concrete-covered thickness side, the stable fixing portion 2 is formed as a right-angled step shape, and the stable fixing portion 2 is formed. From the end to the concrete covering thickness side, and the covering thickness securing portion 3 is extended.
In this case, the rust preventive portion 31 is formed by covering a predetermined range of the tip portion folded back in a U shape with a thin film made of synthetic resin on the side contacting the concrete formwork. .

As shown in the perspective view of the reinforcing bar covering thickness restricting metal fitting of FIG. 19 and the installed perspective view of FIG.
It may be bent horizontally so as to come into contact with the outer peripheral surface of the lower side, and the tip side thereof may be bent and extended vertically upward so as to further contact the outer peripheral surface of the stirrup 5 on the concrete covering thickness side. .

[0031]

The reinforcing bar cover thickness restricting metal fitting 1 of the present invention having the above-described structure has the structure shown in FIGS. 1 and 2, and as shown in FIG. On the concrete covering thickness side at the position intersecting the main bar 4, with respect to the reinforcing bar portion where the two hoop bars 5, 5 are spaced apart from each other at a predetermined interval, the two hoop bars 5, 5 at the top and bottom are provided.
Between the outer peripheral wall surfaces facing each other, the positioning base end portions 21 and 21 which are bent in a U shape and are formed into parallel rods are arranged and joined together, and are located near the base portion of the overburden thickness ensuring portion 3. The portion near the distal end side of the stable fixing portion 2 and the positioning base end portion 21 on the proximal end side of the stable fixing portion 2 are brought into contact with the corresponding concrete covering thickness side peripheral wall surface of the main bar 4 to form the covering thickness securing portion 3 Is positioned so as to project to the concrete covering thickness side, and one or both of the upper and lower positioning base end portions 21 and 21 are brought into contact with the hoop muscles 5 and 5 by winding and fixing with the smoothed iron wire 6. I will end up.

As a result, as shown in FIG. 4, when the concrete form 7 is installed so that the molding surface of the concrete form 7 abuts against the tip of the covering thickness securing portion 3, the hoop 5 located on the outermost side of the concrete covering thickness 5 , 5 to the concrete mold 7 molding surface are made to match the concrete covering thickness dimension D, and similarly, the reinforcing bar covering thickness regulating metal fittings 1, 1, ... As a result, the concrete formwork 7 can be installed more accurately. In addition, if the tip of the overburden thickness securing portion 3 is bent into a V-shape and a synthetic resin coating is applied to form the rustproof portion 31, it can be installed without damaging the concrete molding surface of the concrete formwork 7. In addition, the tip of the covering thickness securing portion 3 exposed on the concrete surface after casting can be rust-proofed.

The cover thickness regulating metal fitting 1 for reinforcing bars shown in FIG.
As shown in FIG. 6, the right-angled L-shaped bent portion formed by the stable fixing portion 2 including the positioning base end portion 21 has a plurality of parallel installations such as reinforcing bars such as columns and beams. Hoop muscle 5,
For each corner formed by 5, ...
Are arranged so as to be orthogonal to each other, and are joined so that the overburden thickness ensuring portion 3 projects toward the concrete overburden side, and stable fixing corresponding to the positioning base end portion 21 and the base portion of the overburden thickness ensuring portion 3 Wrap the tip side of the part 2 with the smoothed iron wire 6,
By fixing, the desired concrete covering thickness dimension D can be secured from the hoop muscles 5, 5, .... Also,
The rust preventive portion 31 composed of a contact head made of a synthetic resin molded product protects the concrete formwork 7, and rustproofs the covering thickness ensuring portion 3 which is partially exposed after the casting.

7 and 8, the reinforcing bar covering thickness regulating metal fitting 1 has two linear bar-shaped positioning base end portions 21 which are erected in parallel at predetermined intervals as shown in FIG. The main bars 4 and 4 of the book are arranged so as to be in contact with the side opposite to the concrete covering thickness side in a substantially horizontal shape, and the U-shaped curved portion is attached so as to surround the outer circumference of the main bar 4 located on the left side of the front with a downward slope. At the same time, the horizontal rod-shaped stable fixing portion 2 corresponding to the vicinity of the base portion of the overburden thickness securing portion 3 is arranged so as to abut on the upper outer peripheral surface of the stirrup bar 5 hung over the two vertical streaks 4 and 4. In addition, the positioning base end portion 21 is attached to the main bar 4 on the right side of the front side so as to be bound with the smoothed iron wire 6, and as shown by the chain line and the solid line in FIG. 10, respectively. 4 has a different diameter d, the covered thickness securing portion 3 curved in an arc shape is Around the thick securing unit 3 base, since it is movable in the swung-shaped in the circumferential direction of the arc,
The desired concrete covering thickness dimension D can be secured without being affected by the change in the diameter d of the main bar 4.

In addition, the cover thickness regulating metal fitting 1 for reinforcing bars of FIGS. 11 and 12 is positioned by bending and extending the main fixing wires 4 and 4 with the stable fixing portion 2 standing in parallel from the front left side. The base end of the base end part 21 is engaged with the right outer peripheral surface of the main bar 4 located on the front right side, and the one end side part of the horizontal linear stable fixing part 2 corresponding to the base part of the overburden thickness ensuring part 3,
As the one joined to the outer peripheral upper surface of the stirrup bar 5 installed on the concrete covering thickness side of the main bars 4 and 4, the covering thickness securing portion 3 is attached so as to project toward the concrete covering thickness side, and the positioning base is provided. It is possible to mount and fix the end portion 2 or an appropriate position of the outer stable fixing portion 2 to the corresponding position of any of the main bars 4, 4 and / or the stirrup bar 5 in a state of being bound by the smoothed iron wire 6. As shown in FIG. 13, a rust preventive portion 31 made of a synthetic resin and having a contact surface formed in a spherical shape having a tip end surface covered with concrete and having a radius of curvature of a thickness dimension D has a main bar 4, 4 Even if the diameter is different and the covering thickness ensuring portion 3 is vertically mounted, a desired concrete covering thickness dimension D can be secured.

The cover thickness regulating metal fitting 1 for reinforcing bars shown in FIGS. 14 and 15 can be attached to the intersection of the main reinforcement 4 and the stirrup 5 which intersects with the concrete overlay thickness side, and its vertical bar-shaped positioning base. The end part 21 is arranged so as to be joined in parallel along the left peripheral wall surface of the front face of the main bar 4, which is the side opposite to the concrete covering thickness side of the stirrup bar 5, and the positioning base end part 21 is horizontally arranged at the tip side. Bend the bent part 5
It is hung on the upper surface of the outer periphery of the concrete so as to be arranged horizontally in a diagonal direction toward the concrete covering thickness side, and the bent portion bent vertically downward on the tip side is hung on the side of the stirrups 5 on the concrete covering thickness side. To secure the cover thickness securing portion 3 to the concrete cover thickness side in a projecting manner, and bind the proper position of the positioning base end portion 21 to the main bar 4 with the smoothed iron wire 6. It can be attached as a fixed one, and the diameter d of the stirrup bar 5 is different in size as shown by the chain line in FIG. 16, and the mounting posture of the overburden thickness ensuring portion 3 is shaken horizontally and horizontally. Even when the rust-preventive portion 31 is moved in a dynamic manner, the spherical tip end surface of the rust preventive portion 31 ensures the same concrete covering thickness dimension D.

17 and 18, the reinforcing bar covering thickness restricting metal fitting 1 has a right-angled step-shaped portion formed on the stable fixing portion 2 with respect to the concrete covering thickness with respect to the intersection of the main reinforcing bar 4 and the stirrup bar 5. While fitted in a fitting shape from above the side,
A pair of positioning base end portions 21 formed facing each other in parallel,
21, the main bar 4 is arranged so as to be sandwiched from both the front left and right sides, and the main bar 4 and the pair of positioning base end portions 2 are arranged.
By binding with annealed iron wire 6 so that 1 and 21 are parallel to each other, the covering thickness securing portion 3 whose tip is folded back in a U shape is horizontally oriented toward the concrete covering thickness side. It will be projected and fixed on. In addition, the covering thickness restricting metal fitting 1 for the reinforcing bar includes a pair of positioning base end portions 21, 2.
Attach one end toward the lower side in FIG. 18, mount the right angled step-shaped portion of the stable fixing portion 2 from the lower side of the concrete covering thickness, tie in place with a smoothing iron wire 6, and attach and fix. Is also possible.

Further, like the overburden thickness regulating metal fitting 1 for reinforcing bars shown in FIGS. 19 and 20, a right angled step shape which can be hooked from below to the stirrup bar 5 at an appropriate position in the middle of the stable fixing portion 2. Even if a part is formed, a pair of left and right positioning base end portions 21 and 21 are attached from the lower side of the stirrup bar 5 to the upper side opposite to the concrete covering thickness side of the main bar 4, The main bar 4 is mounted so as to be sandwiched from the left and right sides, and the right-angled step-shaped portion is positioned so as to be fitted from the lower side of the stirrup bar 5, and the positioning base end part 21,
21 can be attached to and fixed to the main bar 4 by using a smoothed iron wire 6, and the covering thickness securing portion 3 fixed in a projecting shape can be fixed from the main bar 4 and the stirrup 5. The concrete covering thickness dimension D is secured. Also,
The pair of positioning base end portions 21 and 21 are attached so that the right-angled step portions are fitted from the upper side of the stirrups 5 with the ends facing downward, and the pair of positioning base end portions 21 and 21 are mounted.
It is also possible to bind the main bar 4 and the main bar 4 with the smoothed iron wire 6.

[0039]

[Effect] As described above, according to the covering thickness regulating metal fitting for a reinforcing bar of the present invention, basically one steel bar is bent into a desired shape,
Since it is a simple structure that it is formed, the manufacturing unit price is significantly higher than the conventional spacer metal fittings made of synthetic resin molded products and spacer metal fittings made by welding multiple metal molded products In addition to being able to reduce the number of parts, it does not have any thin parts or welds, including the stable fixing part that is attached to the rebar and the part that secures the covering thickness that supports the form, so it is lightweight and has high strength. In addition, it is possible to bind and fix the rebars together with the annealed iron wire that binds the positioning base end, so that it can be installed efficiently without increasing the burden of rebar construction work. It is possible to improve the work efficiency of the formwork construction, and the excellent feature is obtained.

In particular, the cover thickness restricting metal fitting 1 for the reinforcing bar described in the first embodiment has the above-mentioned characteristics, and by bending the contact end portion of the cover thickness securing portion 3 to the concrete form frame 7,
By protecting the concrete formwork 7 surface and forming a rust preventive portion 31 by applying a synthetic resin coating to the same end portion, the penetration of water from the end portion which is exposed on the concrete surface after casting is prevented. The rust preventive portion 31 can be prevented to prevent the generation of rust, and is composed of the synthetic resin contact head shown in the second embodiment.
According to the above, the advantage that the same form 7 protection and rust preventive action can be obtained is also obtained.

Further, as in the third embodiment, the covering thickness securing portion 3
The tip is curved and formed in an arc shape having a concrete covering thickness dimension D as a radius, or as in Example 4,
By attaching a contact head having a tip end surface formed into a spherical shape having a radius of the concrete cover thickness dimension D to the head attachment portion at the tip of the cover thickness securing portion 3, the main bar 4 to be attached or Even if the vertical and horizontal bars, such as the hoop bar 5, have different diameters, the desired concrete cover thickness dimension D can be secured, making it possible to accommodate various construction sites and mounting without complicated classification. In addition to the effect of simplifying the work and eliminating the construction error due to an error in the concrete covering thickness dimension D, like the one shown in Example 5,
According to the structure in which one steel bar is folded back in parallel from the center, high rigidity can be obtained as a whole, and the number of attachments can be further reduced to reduce the number of work steps.

As described above, the cover thickness restricting metal fitting for a reinforcing bar of the present invention can achieve the intended purpose uniformly by its new structure, and is easy to manufacture, and the basic constituent parts are formed by bending a steel bar. , Because it can be molded and manufactured,
Compared to the conventional synthetic resin spacer fittings, the unit price can be kept low, the rigidity is remarkably high, and even with a small number of installations, sufficient strength to support concrete formwork can be obtained. Since the work efficiency itself of the reinforcing bar work and the formwork work can be significantly increased, it is possible to surely achieve the cost reduction and the construction period reduction by rationalizing the construction work. It is expected that it will be widely used and spread widely in the construction industry, where the reduction of labor cost is strongly demanded, while it is becoming increasingly popular.

[Brief description of drawings]

The drawings show several embodiments embodying the technical concept of the overburden thickness regulating metal fitting for a reinforcing bar of the present invention.

FIG. 1 is a perspective view showing a shape of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 2 is a cross-sectional view showing a structure of a covered thickness ensuring portion.

FIG. 3 is a perspective view showing an attached state of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 4 is a side view showing an attached state of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 5 is a perspective view showing a shape of a cover thickness regulating metal fitting for a reinforcing bar.

FIG. 6 is a perspective view showing a state in which the covering thickness regulating metal fittings for reinforcing bars of FIG. 5 are attached.

FIG. 7 is a perspective view showing a shape of a cover thickness regulating metal fitting for a reinforcing bar.

FIG. 8 is a cross-sectional view showing a structure of a covered thickness ensuring portion.

FIG. 9 is a perspective view showing an attached state of the covering thickness regulating metal fitting for the reinforcing bar of FIG. 7.

FIG. 10 is a side view showing an attached state of the covering thickness regulating metal fitting for the reinforcing bar of FIG. 7.

FIG. 11 is a perspective view showing a shape of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 12 is a perspective view showing a state in which the covering thickness restricting metal fitting for reinforcing bar in FIG. 11 is mounted.

13 is a side view showing a mounted state of the reinforcing bar covering thickness restricting metal fitting of FIG. 11. FIG.

FIG. 14 is a perspective view showing a shape of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 15 is a perspective view showing a state in which the covering thickness regulating metal fittings for reinforcing bars of FIG. 14 are mounted.

16 is a plan view showing a mounted state of the reinforcing bar covering thickness restricting metal fitting of FIG. 14. FIG.

FIG. 17 is a perspective view showing the shape of a covering thickness regulating metal fitting for a reinforcing bar.

FIG. 18 is a perspective view showing a mounted state of a reinforcing bar covering thickness restriction metal fitting.

FIG. 19 is a perspective view showing a shape of a cover thickness regulating metal fitting for a reinforcing bar.

FIG. 20 is a perspective view showing a state in which a cover thickness regulating metal fitting for a reinforcing bar is attached.

[Explanation of symbols]

1 Cover thickness control metal fittings for reinforcing bars 2 Stable fixing part 21 Same position base end 3 Covering thickness securing part 31 Same rust prevention section 32 Same fastener with collar 4 main muscles (vertical muscles) 5 hoop muscle (horizontal muscle) 6 Normal iron wire 7 concrete formwork D Desired concrete cover thickness d Diameter of rebar

Claims (11)

[Claims] 1. A positioning base end portion, which is capable of being attached by winding an annealed iron wire on at least one of a vertical bar and a horizontal bar, on the base end side of a steel bar, and the positioning base end. Stable by bending and deforming the part that is continuously stretched to one end side of the part so that it includes a shape that can be arranged in a cross shape with respect to at least one of the other vertical streak or the horizontal streak located on the outermost side. In addition to the fixed part, the side of the stable fixed part that is not the previous positioning base end side projects to the concrete covering thickness side by an amount that can secure a predetermined covering thickness, and is extended to form the covering thickness securing portion. A cover thickness control metal fitting for reinforcing bars, which is characterized in that 2. A base end side of a steel bar is a positioning base end part capable of being attached by winding an annealed iron wire to at least one of a vertical bar and a horizontal bar, and the positioning base end. Stable by bending and deforming the part that is continuously stretched to one end side of the part so that it includes a shape that can be arranged in a cross shape with respect to at least one of the other vertical streak or the horizontal streak located on the outermost side. In addition to the fixed part, the side of the stable fixed part that is not the previous positioning base end side is projected and extended to the concrete covering thickness side by an amount that can secure a predetermined covering thickness, and if necessary, A cover thickness regulating metal fitting for a reinforcing bar, characterized in that it is formed in a cover thickness securing portion that enables attachment by winding a steel wire. 3. A positioning base end portion capable of being mounted by winding annealed iron wire on at least one of a vertical bar and a horizontal bar on the base end side of the steel bar, and the positioning base end. A portion that is continuously stretched to one end side of the portion is bent and deformed so as to include a shape that can be in a cross-shaped arrangement with respect to at least one of the other vertical streak or the horizontal streak located at the outermost side, In addition to the positioning base end part, a stable fixing part capable of resisting the pressing force from the concrete covering thickness side is provided, and the side of the stable fixing part which is not the preceding positioning base end part side is The covering thickness is secured to the concrete covering thickness side by an amount capable of ensuring a predetermined covering thickness, and is made to extend to the concrete covering thickness side, and if necessary, it is formed in the covering thickness securing portion that enables attachment by winding annealed iron wire. A cover thickness control fitting for reinforcing bars, which is characterized in that 4. A base end side of a steel bar having a predetermined length is provided as a positioning base end portion capable of being attached to at least one of a vertical bar and a horizontal bar by winding an annealed iron wire. , At a predetermined interval so that the portion that is continuously extended to one end side of the positioning base end portion can be arranged in a cross shape with respect to at least one of the other longitudinal streaks or the lateral streaks located at the outermost side. At least one of a pair of vertical stripes or horizontal stripes arranged in parallel is bent and deformed into a substantially U-shape that can be arranged in parallel to form a stable fixing part, and the stable fixing part has a previous position. The reinforcing bar cover characterized in that the side other than the base end side is projected to the concrete cover thickness side by an amount capable of ensuring a predetermined cover thickness and extended to form a cover thickness ensuring portion. Thickness control metal fittings. 5. A base end side of a steel bar having a predetermined length is substantially orthogonal to a corner portion formed by at least one of a plurality of vertical bars or horizontal bars arranged in parallel with each other. Can be attached in a substantially L-shape to form a positioning base end portion that can be attached by winding annealed iron wire, and continuously form one end side of the positioning base end portion. The stretched portion is bent and deformed so as to include a shape capable of forming a cross-shaped arrangement with respect to at least one of the other vertical streaks or the horizontal streaks located on the outermost side to form a stable fixing part, and then the stable fixing. The side that is not the base end side of the positioning above is projected and extended to the concrete overburden side by an amount that can secure a predetermined overburden thickness, and is formed in the overburden thickness securing portion. Cover thickness control metal fittings for rebar. 6. The base end side of a steel bar having a predetermined length can be arranged in parallel with one horizontal bar, and is bent in a U shape so as to wrap around either above or below the horizontal bar. Positioned base end that can be bent and stretched and can be engaged across a plurality of adjacent vertical bars located on the side opposite to the concrete covering thickness side and can be attached by winding annealed iron wire In addition, the portion of the positioning base end portion that is continuously extended to one end side is bent and deformed so as to include a shape that can be arranged in a cross shape with respect to the outermost vertical line. In addition to the stable fixing part, the side of the stable fixing part that is not the previous positioning base end side is projected to the concrete covering thickness side by the amount that can secure the predetermined covering thickness, and is extended to the covering thickness ensuring portion. At least the side shape of the tip that forms and secures the covering thickness of the concrete formwork Since the concrete base is formed in an arc shape with the thickness of the covering layer as the radius, the diameter of the vertical bar attached to the positioning base end is different, and the tip of the covering thickness ensuring portion is A cover thickness regulating metal fitting for a reinforcing bar, characterized in that a constant cover thickness dimension can be ensured even when is moved in a substantially vertical direction. 7. An L shape in which a base end side of a steel bar having a predetermined length can be installed in parallel with one vertical bar and can be arranged in parallel with a horizontal bar crossing the vertical bar. Bending and stretching in the shape of at least one of the vertical or horizontal bars to form a positioning base end that can be attached by winding annealed iron wire,
A portion that is continuously stretched to one end side of the positioning base end portion is bent and deformed so as to include a shape that can be arranged in a cross shape with respect to a lateral streak located on the outermost side to form a stable fixing portion. On the side of the stable fixing portion, which is not the base end portion on the previous positioning, is projected and extended to the concrete covering thickness side by an amount capable of ensuring a predetermined covering thickness, and is formed into the covering thickness ensuring portion. At least the planar shape of the tip end that abuts against the formwork is formed in an arc shape with the concrete cover thickness dimension as a radius with the cover thickness securing portion base as the center. Since the diameters of the attached horizontal bars are different, even if the tip of the covering thickness ensuring portion moves in a substantially horizontal direction, a constant covering thickness dimension can be secured, and the covering thickness regulating metal fitting for reinforcing bars is characterized. . 8. The base end side of a bar steel of a predetermined length is folded back in parallel at the substantially central portion, and a pair of parallel base end sides can be attached so as to sandwich at least one of a vertical bar and a horizontal bar. In addition, at least one of the vertical bar and the horizontal bar is a positioning base end that enables attachment by winding annealed iron wire, and the steel bar is positioned at a proper position near the center on the outermost side. The stable fixed portion is bent and deformed so as to include a shape that can be crossed with at least one of other vertical stripes or horizontal stripes. A cover thickness regulating metal fitting for a reinforcing bar, characterized in that the non-cover side is formed as a cover thickness securing portion by projecting and extending to the concrete cover thickness side by an amount capable of ensuring a predetermined cover thickness. 9. The cover thickness regulating metal fitting for a reinforcing bar according to claim 1, wherein the cover thickness ensuring portion is provided with a rust preventive portion at a tip end that abuts on the concrete formwork. 10. The overburden thickness securing portion is provided with a rust preventive portion formed by closely coating a relatively thin synthetic resin coating in a predetermined range on the tip end side in contact with the concrete formwork. Item 16. A cover thickness regulating metal fitting for a reinforcing bar according to any one of items 1 to 8. 11. The overburden thickness securing portion is made of a relatively hard synthetic resin at a tip end that abuts against a concrete formwork, and has a spherical shape in which a projecting end is formed to have an arbitrary radius, or a radius substantially equal to the concrete overburden thickness dimension. To the male screw part or the connecting hole of the contact head formed by forming a spherical shape and forming a female screw hole at the base or forming a connecting hole having a diameter slightly smaller than the steel bar tip diameter. The cover thickness regulating metal fitting for a reinforcing bar according to any one of claims 1 to 8, wherein a head attachment portion that can be screwed or press-fitted to be integrated is provided.