JPH0724496Y2 - Rebar spacer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a reinforcing bar spacer for securing a concrete covering thickness of a reinforcing bar. More specifically, the present invention is used for a reinforcing bar crossing part such as wall bars crossing vertically and horizontally. Reinforcing bar spacer.

[Prior Art] Conventionally, in general, an outer wall is generally shown in Figs.
The donut type spacer a as shown in FIG. b is a vertical streak, c is a horizontal streak, d is a formwork for outer wall, and t is a concrete covering thickness.

This kind of spacer a is
It is used by being attached to the horizontal streak c. This is because when the spacer a is attached to the vertical bar b and used, not only is the spacer a likely to fall off due to pressure and vibration during concrete pouring, but also the spacer a has a horizontal posture, so This is because there is a high possibility that dense concrete will not be obtained, such as the flow of concrete in (circulation of concrete) being hindered and cavities and miniature boards being generated.

By the way, when arranging wall reinforcement, it is desirable to arrange the horizontal reinforcement c outside the vertical reinforcement b (on the formwork d side) as shown in FIG. 3 (a). Depending on the procedure, the horizontal streak c is abutted against the vertical streak b from the indoor side to bind the intersections of the two, so that the vertical streak b may come to the outside as shown in FIG. 3 (b). . That is, the outside (the mold side d)
The direction of the rebar coming to is either vertical or horizontal. In any of the bar arrangements, it is necessary to keep the distance between the outer reinforcing bar and the formwork (concrete cover thickness t) at a certain level or more.

For this reason, conventionally, depending on the direction of the rebar coming to the outside,
As shown in FIGS. 3 (a) and 3 (b), 2 with different diameters are used.
Since it is necessary to properly use different types of spacers a, material management and construction management are very troublesome, and spacer a is often used.
There was a case that the covering thickness was insufficient due to the wrong size.

In addition, a metal plate punched out in a predetermined shape is bent into an inverted pyramid shape, the top part thereof is formed in the form abutting part, and four legs connected to each ridge line are wound around the reinforcing bar and fixed. The rebar spacer used in Japanese Patent Laid-Open Publication No. 50-32818 has already been proposed.

According to this reinforcing bar spacer, since the four legs are fixed on both sides of the intersection with respect to the reinforcing bars crossing each other at right angles, the reinforcing bar spacer is firmly attached to the reinforcing bar crossing at four points. As a result, the reinforcing bar spacers are prevented from falling off and deforming due to pressure and vibration during concrete pouring, and the reinforcing bar binding effect of the reinforcing bar spacers is obtained. It is possible to obtain excellent advantages such as prevention, which cannot be expected with a donut type spacer.

However, since this rebar spacer has a structure in which four legs are wound and fixed so as to wrap the rebar by field work, one rebar spacer is to be wound four times. Not only the work efficiency is bad, but from which position to bend the legs,
Since it will be entrusted to the workers at the site, individual differences will occur, the variation in concrete cover thickness is likely to occur, and since the metal plate is bent into an inverted pyramid shape,
There was room for improvement in many respects, such as the fact that it was difficult to fill the inside of the frame contact portion of the reinforcing bar spacer with concrete, and there was a high possibility that cavities would occur at this portion.

[Problems to be solved by the invention]

The present invention is an improvement of these points, and can be easily and efficiently installed at the intersection of the reinforcing bars, and the concrete cover thickness does not vary due to individual differences of workers, and It is an object of the present invention to provide a reinforcing bar spacer having a good filling property for concrete without the possibility of unexpectedly changing the position of.

[Means for solving problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, the feature of the reinforcing bar spacer according to the present invention is that two steel wires bent in a substantially mountain shape are overlapped with each other in a cross shape and fixed to each other, and the cross-shaped overlapped portion is configured as a form contact portion. In the end portion of the steel wire, a substantially U-shaped curved portion that is opened laterally and on the same side in the circumferential direction is bent and formed, and the curved portion is formed on each of the reinforcing bars that intersect each other at right angles. It is a point that is configured as a fitting portion that elastically fits on both sides of the intersection.

[Action]

According to the above configuration, by rotating the reinforcing bar spacer around the cross-shaped intersection of the reinforcing bar and rotating it about the center line of the reinforcing bar spacer, the four fitting parts are elastically moved from the lateral direction to the reinforcing bar at the same time. As a result of fitting, it is possible to easily and efficiently attach the reinforcing bar spacer to the reinforcing bar intersection.

Also, regardless of whether the reinforcing bars coming to the outside are oriented vertically or horizontally, by changing the orientation of the reinforcing bar spacers by 90 degrees, the spacers can be securely attached to the reinforcing bar intersection at four points. it can.

And, when the reinforcing bar spacer is attached to the reinforcing bar intersection, the distance from the reinforcing bar to the form abutment is constant regardless of the direction of the reinforcing bar coming to the outside, and the concrete covering thickness of the reinforcing bar coming to the outside is always constant. Will be secured.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a reinforcing bar spacer A according to the present invention. In this reinforcing bar spacer A, two steel wires bent in a substantially chevron shape are overlapped with each other in a cross shape and fixed to each other, and the cross-shaped overlapped portion is configured as a form abutment portion 1. At the end of each of the openings U, which are opened laterally and on the same side in the circumferential direction.
B-shaped curved portions are formed by bending, and the curved portions are formed in fitting portions 2a, 2b, 2c, 2d that elastically fit on each side of the reinforcing bars that intersect at right angles to each other. It was done.
Of the fitting portions 2a, 2b, 2c, 2d, a pair of fitting portions 2a, 2b that fit with the reinforcing bars B that come to the outside (form side) and a pair of fittings that fit with the reinforcing bars C that come inside. The parts 2c and 2d are displaced in the height direction of the form abutment part 1 by the diameter of the reinforcing bars B and C, and the fitting part 2a, which fits with the reinforcing bar B coming to the outside (form side). The distance between the inner surface of 2b and the apex of the form contact portion 1 is set so that the required concrete cover thickness is obtained.

It is desirable to use stainless steel wire as the steel wire. In the case of steel steel wire, a rust preventive coating film 5 made of vinyl or the like is formed on the mold contact portion 1 and its vicinity as shown by a virtual line.
Should be given.

According to the above-described embodiment, the rebar spacer A is applied to the cross-shaped intersection of the rebars B and C, and is rotated around the center line of the rebar spacer A so that the four fitting portions 2a, 2
b, 2c, 2d will be elastically fitted to the reinforcing bars B, C simultaneously from the lateral direction, so that the reinforcing bar spacer A can be easily and efficiently attached to the cross section of the reinforcing bar, and the concrete cover thickness There is no variation due to individual differences, and there is no risk of accidentally changing the positions of the reinforcing bars B and C when mounting the reinforcing bar spacer A.

That is, since the fitting portions 2a, 2b, 2c, 2d are formed in advance on both ends of the wire, there is no possibility of individual differences in the bending position, as in the case of winding and fixing the reinforcing bars by on-site work. No matter who works, a certain concrete cover thickness will be secured.

Moreover, since the four fitting portions 2a, 2b, 2c, 2d are elastically fitted to the reinforcing bars B and C at the same time, it is possible to easily and efficiently attach the reinforcing bar spacer A to the reinforcing bar intersection.

Particularly, the four fitting portions 2a, 2b, 2c, 2d are composed of substantially U-shaped curved portions that are opened laterally and on the same side in the circumferential direction,
By rotating around the center line of the reinforcing bar spacer A, the reinforcing bars B and C are elastically fitted laterally. Therefore, the fitting portions 2a, 2b, 2c and 2d are elastically fitted to the reinforcing bars B and C. When doing so, the reinforcing bar spacer A does not push the reinforcing bars B and C inward (in the wall thickness direction), and the positions of the reinforcing bars B and C do not change.

Further, since the reinforcing bar spacer A is formed by superimposing two steel wires in a cross shape, it does not hinder the flow of concrete, and the inside of the mold contact portion 1 is reliably filled with concrete. There is no risk of cavities occurring in the part.

In addition, when the reinforcing bar B coming to the outside is sideways, the fitting portions 2a, 2
When b is fitted to the horizontal rebar B and the other fitting portions 2c and 2d are fitted to the inner longitudinal rebar C, respectively, and the outer rebar is oriented vertically (see Fig. 2 a virtual axis perpendicular to the plane of the drawing). In a state of being rotated 90 degrees around), the reinforcing bar spacer A is rotated by 90 degrees so that the fitting portions 2a and 2b are longitudinal reinforcing bars and the other fitting portions 2c and 2d.
Will be fitted respectively to the horizontal reinforcing bars coming inside.

In any case, the space between the outer reinforcing bar and the formwork 3 (concrete cover thickness) is secured, and the reinforcing bar spacer A is in a four-point support state and is firmly attached to the reinforcing bar intersection. .

[Effect of device]

Since the present invention has the above-mentioned configuration, the following effects can be obtained.

Since two steel wires were laid in a cross shape to form a reinforcing bar spacer, the reinforcing bar spacer did not hinder the flow of concrete, and the inside of the form contact part was reliably filled with concrete. There is no risk of cavities.

Since fitting parts are formed in advance on both ends of the wire rod, as in the case of winding and fixing it on the rebar by field work,
There is no risk of individual differences in the bending position, and a constant concrete cover thickness will be secured regardless of who works, and there will be no variation in concrete cover thickness due to individual differences among workers.

Rotating the rebar spacers around the center line of the rebar spacers with the rebar spacers applied to the cross-shaped intersections of the rebars, the four fitting parts elastically fit to the rebars simultaneously from the lateral direction. The work of attaching the reinforcing bar spacer to the portion can be performed easily and efficiently.

The four fitting parts are composed of substantially U-shaped curved parts that are opened laterally and on the same side in the circumferential direction, and are rotated around the center line of the reinforcing bar spacer so that they can be elastically fitted to the reinforcing bar from the lateral direction. With this configuration, when the fitting portion is elastically fitted to the reinforcing bar, the reinforcing bar spacer does not push the reinforcing bar inward, and the position of the reinforcing bar does not change unexpectedly.

[Brief description of drawings]

FIG. 1 is a perspective view of a reinforcing bar spacer according to the present invention viewed from the back side, and FIG. 2 is a front view in a use state. FIGS. 3A and 3B are explanatory views of a conventional example. 1 ... Form contact part, 2a, 2b, 2c, 2d ... Fitting part, A ... Reinforcing bar spacer.

Claims (1)

[Scope of utility model registration request] 1. An end of the steel wire, wherein two steel wires bent in a substantially chevron shape are overlapped with each other in a cross shape and fixed to each other, and the cross-shaped overlapped portion is configured as a mold contact portion. A substantially U-shaped curved portion that opens laterally and on the same side in the circumferential direction is bent and formed, and the curved portion is elastic at both sides of the intersection with respect to each of the reinforcing bars that intersect each other at right angles. Reinforcing bar spacer, characterized in that it is configured as a fitting part that fits physically.