JP2015010455A - Reinforcement crossing support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement crossing support capable of surely installing a mesh-like reinforcement of weld-processing all crossing places in a short time.SOLUTION: A reinforcement crossing support 1 is provided for supporting a plurality of mutually orthogonal and orthogonal place-welded reinforcements 10a and 10b. The reinforcement crossing support comprises a cylindrical body 1a, a plurality of elastic skirt parts 3 connected to a lower part of the cylindrical body and a notch part 2 provided in four places of a sidewall of the cylindrical body 1a, and the notch part 2 is arranged every other 90° around the cylindrical body 1a, and is constituted of a notch part inlet 2a for inserting the reinforcements 10a and 10b and a reinforcement receiving part 2b for receiving the reinforcements.

Description

  The present invention relates to a reinforcing bar crossing support for supporting a reinforcing bar of RC structure.

  In recent years, reinforcing bars for concrete reinforcement used in the construction of parking lots and RC-structured buildings are usually arranged in a lattice shape and used as a concrete core material. Then, as shown in FIG. 7, when reinforcing bars 10a and 10b are arranged in a lattice pattern, the height of the reinforcing bars and the crossing points are determined using a dice-shaped concrete block 400 (FIG. 7A) as a support. For positioning, a method of binding and fixing with a wire Wr is often employed. In this case, it takes time to bind the reinforcing bars 10a and 10b to the concrete block 400 with the wire Wr, and there is a problem in that the reinforcing bars 10a and 10b cannot be accurately positioned.

  Therefore, for example, in Patent Document 1, in the construction of reinforcing bars at the time of placing concrete, by using a support that has elasticity that does not require a wire for binding, the labor of bar arrangement work can be saved and the cost can be reduced. In addition, a technique of reinforcing bar crossing support that can shorten the work period and rationalize the field work is disclosed. Below, this reinforcing bar crossing support is explained.

  As shown in FIGS. 8 (a) and 8 (b), the reinforcing bar crossing support device of Patent Document 1 raises the cylindrical elastic body 100 made of synthetic resin or synthetic rubber, and the side surface 10-3 of the cylindrical elastic body 100. An elongated hole 20-1 having a width d2 (φ≈d2) approximate to the reinforcing bar diameter φ for removably engaging and fitting the single reinforcing bar 10b below is a cylindrical elastic body from the bottom to the top. It is cut with 100 opposite side faces 10-4. Then, the other long hole 20-2 is cut together with the side surface 10-2 facing downward from the upper side surface 10-1 so that the other reinforcing bar 10a is orthogonal to the one reinforcing bar 10b. The two reinforcing bars 10a and 10b that intersect each other can be held at a predetermined position and a predetermined height.

  8A and 8B, the long holes 20-1, 20-1, and 20-2, 20-2 are such that the opening dimension d1 of the cut entrance 20a is smaller than the reinforcing bar diameter φ (d1 <φ). ) When the reinforcing bars 10a and 10b are engaged and fitted, they can be elastically expanded and contracted. The receiving portions 20b at the ends of the long holes 20-1 and 20-2 are formed in a circular shape so as to engage with the diameter φ of the reinforcing bars 10a and 10b.

  Fig. 8 (c) shows an example of the construction of a concrete floor such as a parking lot. After the leveled ground is laid, a discarded container (or waterproof layer) is laid to make it flat and uniform. Then, the lower reinforcing bar 10b is disposed thereon, and then the reinforcing bar crossing support member of the cylindrical elastic body 100 made of synthetic resin or synthetic rubber having a predetermined size capable of holding a predetermined height is used as the long hole 20-1. , 20-1 facing downward, engaging and fitting to the lower rebar 10b from above, and the upper rebar 10a intersecting from above is facing the cylindrical elastic body 100 and opening its mouth Reinforcing bars 10a and 10b can be laid in a grid by engaging and fitting in holes 20-2 and 20-2 and disposing them at predetermined positions.

Japanese Patent Laid-Open No. 2007-100466

  However, the rebars used in recent RC structures are sold in a state where the upper and lower rebars are arranged in a mesh shape and all the intersections are welded, especially those with a small diameter. There are many more. There exists a subject that the reinforcing bar comprised in such mesh shape cannot be supported with the reinforcing bar crossing support tool of patent documents 1. That is, the reinforcing bar crossing support of Patent Document 1 cannot be used unless the individual reinforcing bars are separated.

  The present invention has been made to solve the above-described problems, and provides a reinforcing bar crossing support tool capable of reliably installing a mesh-like reinforcing bar in which all crossing points are welded in a short time. The purpose is to do.

  The present invention has the following configuration in order to solve the above problems.

(1) Reinforcing bar cross support tool for supporting a plurality of reinforcing bars that are orthogonal to each other and welded at orthogonal points,
A tubular body;
A plurality of bottom portions having elasticity connected to a lower portion of the cylindrical body;
Cutting portions provided at four locations on the side wall of the cylindrical body,
Reinforcing bar crossing, wherein the notch part is arranged at intervals of 90 ° with respect to the center of the cylindrical body, and includes a notch part entrance into which the reinforcing bar is inserted and a reinforcing bar receiving part that receives the reinforcing bar. Support tool.

  (2) The reinforcing bar crossing support tool according to (1), wherein the cut portion has an L shape.

  (3) The reinforcing bar crossing support device according to (1) or (2), wherein a cross-sectional shape of the cylindrical body is rectangular or circular.

  (4) The reinforcing bar crossing support according to any one of (1) to (3), wherein the cylindrical body and the skirt are made of resin.

  (5) It is constituted by a plurality of reinforcing bar crossing support tools, and the cylindrical body of the other reinforcing bar crossing support tool is inserted into the skirt of the reinforcing bar crossing support tool. The reinforcing bar crossing support device according to any one of (4) to (4).

  ADVANTAGE OF THE INVENTION According to this invention, the reinforcing bar crossing support tool which can install the mesh-like reinforcing bar by which all the crossing locations were weld-processed in a short time reliably can be provided.

The figure which showed the structure of the reinforcing bar crossing support tool of Example 1. The figure which showed the state which inserts a reinforcing bar in the reinforcing bar crossing support tool of Example 1. The other figure which showed the state which inserts a reinforcing bar in the reinforcing bar crossing support tool of Example 1. The figure which shows the installation state in the spot of the reinforcing bar crossing support tool of Example 1. The figure which shows the reinforcing bar crossing support tool of Example 2, and the installation state in the field The figure which shows the reinforcing bar crossing support tool of Example 3. The figure which showed the conventional reinforcing bar crossing support and its installation state The figure which showed other conventional rebar crossing support tools, and the installation state

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a view showing a reinforcing bar crossing support tool according to the present embodiment. FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a right side view. For reference, part of the reinforcing bars to be supported are also displayed. The reinforcing bar crossing support 1 is basically composed of one cylindrical body 1a and four skirts 3. The skirt 3 is connected to the lower part of the cylindrical body 1a and is preferably curved as shown. Since the skirt 3 is curved, the reinforcing bar crossing support 1 has elasticity (springiness) in the vertical direction. This spring effect will be described in detail later. In addition, the reinforcing bar crossing support tool 1 of a present Example is normally produced by shape | molding ABS resin etc.

  Furthermore, the cylindrical body 1a of the reinforcing bar crossing support 1 has cut portions 2 at four locations on the side wall as shown in the figure. The cut portion 2 has a substantially L-shape, and includes a cut portion inlet 2a from the upper portion of the cylindrical body and a bent reinforcing bar receiving portion 2b connected thereto. In addition, as shown in FIG.1 (d), the front part of the notch entrance 2a has a length which can enter the inside of the reinforcing bar cross support 1 with the crossed reinforcing bars 10a and 10b rotating. Suppose you are. The vertical width A of the reinforcing bar receiving portion 2b is slightly larger than the total value (2φ) of the diameters φ of the two reinforcing bars 10a and 10b. Furthermore, the length B of the L-shaped portion must be long enough to prevent the reinforcing bars 10a, 10b and the reinforcing bar crossing support 1 from interfering when the crossed reinforcing bars are in the state shown in FIG. As can be seen from the figure, the four cut portions 2 are arranged every 90 ° with respect to the center of the reinforcing bar crossing support 1. This corresponds to the fact that the upper and lower reinforcing bars 10a and 10b are arranged and welded at right angles.

  Next, the state until the crossed reinforcing bars 10a and 10b are inserted into the reinforcing bar crossing support 1 and fixedly supported is shown in FIG. FIG. 2A shows a state in which the crossed reinforcing bars 10a and 10b are descending from above toward the reinforcing bar crossing support 1, and FIG. 2B shows the crossed reinforcing bars 10a and 10b being the notch entrance 2a. It is a figure which shows the state inserted in. The inserted reinforcing bars 10a, 10b are rotated in the direction of the arrow in the figure after the lower part of the lower reinforcing bar 10b contacts the reinforcing bar receiving part 2b. The state after the rotation is shown in FIG. In this state, the intersection of the reinforcing bars 10 a and 10 b is located at the center of the reinforcing bar cross support 1. In this state, the lower two reinforcing bars 10b and the upper two upper reinforcing bars 10a are in contact with the reinforcing bar receiving portion 2b, and the crossed reinforcing bars themselves are restrained in the vertical direction. become. Moreover, since the cut | notch part 2 is L-shaped, the crossed reinforcing bars 10a and 10b cannot escape easily from a reinforcing bar crossing support tool.

  FIG. 3A is a view of the state in which the reinforcing bar crossing support tool 1 is inserted into the crossed reinforcing bars 10a and 10b as viewed from above, and FIG. 3B is a state in which the reinforcing bar crossing support tool 1 is rotated. It is the figure which looked at from the upper part. FIG. 4 is a perspective view showing a state where a plurality of reinforcing bar crossing supports are actually installed. Since the supported reinforcing bars are all welded at the intersections of the upper reinforcing bar 10a and the lower reinforcing bar 10b as already described, if they are fixed at a plurality of predetermined positions, they are surely fixed at desired positions. Further, the reinforcing bar crossing support 1 of the present embodiment has the four bottoms 3 having elasticity. For example, even if the crossing reinforcing bars 10a and 10b to be installed are somewhat wavy, the upper and lower sides thereof The displacement difference in direction can be absorbed. This also contributes to a reduction in the time for installing the reinforcing bars.

  A present Example is an example in the case of using two or more reinforcement crossing support tools of Example 1 in the same location. That is, for example, the required thickness of the concrete layer may not be compatible with the prepared reinforcing bar crossing support. In other words, it is ideal that the crossed reinforcing bars are installed at a substantially central position in the thickness direction of the concrete layer. This is because the strength of the entire concrete can be maximized by installing crossed reinforcing bars. However, the thickness of the concrete layer is large, and in the prepared reinforcing bar crossing support tool, the crossed reinforcing bar may have to be supported downward from the center of the thickness of the concrete layer.

  FIGS. 5A and 5B are views showing a state in which the crossed reinforcing bars are moved upward by overlapping the reinforcing bar crossing supports prepared in such a case. By inserting another reinforcing bar crossing support tool from below the upper reinforcing bar crossing support tool, the vertical position of the crossed reinforcing bars can be raised. Thus, by using two (plural) reinforcing bar crossing supports, it is possible to deal with concrete layers of various thicknesses without designing and manufacturing a new reinforcing bar crossing support.

  According to the reinforcing bar crossing support tool of the present embodiment, it is possible to reliably install the mesh-like reinforcing bar in which all the crossing points are welded in a short time.

  The reinforcing bar crossing support tool of the present embodiment is the same as the reinforcing bar crossing support tool of Example 1 in terms of functional configuration, but is different in that the cross-sectional shape of the cylindrical body is circular. FIG. 6 shows a perspective view of the reinforcing bar crossing support 5 of this embodiment. The cut portions are formed in the side wall of the cylindrical body every 90 °, and the cut portion entrance and the reinforcing bar receiving portion are formed in an L shape as in the first embodiment. Also, the shape of the skirt is the same and has elasticity in the vertical direction.

  If the cross-sectional shape is circular as in the reinforcing bar crossing support tool 5 of this embodiment, for example, when this support tool is molded from a resin, there are advantages such as easy fabrication of the mold and advantages in strength. .

  According to the reinforcing bar crossing support tool of the present embodiment, it is possible to reliably install the mesh-like reinforcing bar in which all the crossing points are welded in a short time.

DESCRIPTION OF SYMBOLS 1 Reinforcing bar crossing support 1a Cylindrical body 2 Notch part 2a Notch part entrance 2b Reinforcing bar receiving part 3 Bottom part 10a, 10b

(1) Reinforcing bar cross support tool for supporting a plurality of reinforcing bars that are orthogonal to each other and welded at orthogonal points,
A tubular body;
A plurality of skirts having elasticity in the vertical direction connected to the lower part of the cylindrical body;
L-shaped cut portions provided at four locations on the side wall of the cylindrical body,
Reinforcing bar crossing, wherein the notch part is arranged at intervals of 90 ° with respect to the center of the cylindrical body, and includes a notch part entrance into which the reinforcing bar is inserted and a reinforcing bar receiving part that receives the reinforcing bar. Support tool.
(2) The reinforcing bar cross supporter according to (1), wherein a cross-sectional shape of the cylindrical body is rectangular or circular.
(3) The reinforcing bar crossing support according to (1) or (2), wherein the cylindrical body and the skirt are made of resin.
(4) It is constituted by a plurality of the reinforcing bar crossing support tools, and the cylindrical body of the other reinforcing steel bar crossing support tool is inserted into the bottom part of the reinforcing bar crossing support tool. The reinforcing bar crossing support device according to any one of (3) to (3).

Claims (5)

A reinforcing bar crossing support tool for supporting a plurality of reinforcing bars that are orthogonal to each other and welded at orthogonal points,
A tubular body;
A plurality of bottom portions having elasticity connected to a lower portion of the cylindrical body;
Cutting portions provided at four locations on the side wall of the cylindrical body,
Reinforcing bar crossing, wherein the notch part is arranged at intervals of 90 ° with respect to the center of the cylindrical body, and includes a notch part entrance into which the reinforcing bar is inserted and a reinforcing bar receiving part that receives the reinforcing bar. Support tool.   The reinforcing bar crossing support tool according to claim 1, wherein the cut portion is L-shaped.   The cross section of the cylindrical body is rectangular or circular, and the reinforcing bar crossing support tool according to claim 1 or 2.   4. The reinforcing bar crossing support device according to claim 1, wherein the cylindrical body and the skirt portion are made of resin. 5.   It is comprised by the said several reinforcing bar crossing support tool, The said cylindrical body of the other said reinforcing bar crossing support tool is inserted in the said skirt part of the said reinforcing steel bar crossing support tool, Any one of Claim 1 thru | or 4 characterized by the above-mentioned. The reinforcing bar crossing support tool according to claim 1.

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