JPH0835289A - Spacer of reinforcement buried in concrete - Google Patents

Abstract

PURPOSE:To make it possible to securely hold a reinforcing bar in a specific position and, to enable the reinforcing bars arrangedat a right angle to fix. CONSTITUTION:A spacer holds reinforcing bar arranged at a right angle in a state to separate it upward of specific size from a form surface or a footing surface, and a reinforcement mounting section 3 holding a reinforcing bar 6 positioned to the lower side from below the reinforcing bar, a reinforcing bar holding section 2 for holding a reinforcing bar 5 positioned to the upper side and a contact section 4 bringing into contact with the form surface or footing surface are monolithically formed. The reinforcing bar holding section 2 is mounted upward of one side of the reinforcing bar mounting section 3 and, the contact section 4 is mounted downward of the other side of the reinforcing bar mounting section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spacer for arranging a reinforcing bar to be embedded in a concrete floor, a ceiling or the like with a predetermined distance from a formwork surface or foundation surface.

[0002]

2. Description of the Related Art In a slab such as a concrete floor, spacers are used to dispose the reinforcing bars with a certain size above the formwork surface or foundation surface so that the reinforcing bars are not exposed on the concrete surface.
Conventionally, as this type of spacer, the one shown in FIG. 8 has been known. The object shown in FIG. 8 (A) is a cross-shaped short pillar (5
The upper edge of (0) is made of synthetic resin in a shape cut out in an arc shape, and the one shown in FIG. 8 (B) is formed by bending a steel wire (51) into a double mountain shape in which the center is depressed. Both of them are cutouts (52) or recesses on the top.
The structure is such that the reinforcing bar is placed on (53).

[0003]

However, in each of the above-mentioned conventional ones, only the reinforcing bars are placed. Therefore, after the reinforcing bars are arranged in a state of being orthogonal to each other, their intersections are bound by binding wires. In addition to that, if you walk on the reinforcing bars assembled in a grid pattern when checking the reinforcing bar pitch after binding the reinforcing bars, the springs due to the bending of the reinforcing bars cause the reinforcing bars to disengage from the spacers, causing the reinforcing bars to fall and formwork. There was a case where a predetermined distance from the surface could not be obtained. It is an object of the present invention to provide a spacer capable of securely holding a reinforcing bar at a predetermined position and fixing the orthogonally arranged reinforcing bars by paying attention to such a point.

[0004]

In order to achieve the above object, the present invention has a reinforcing bar placing portion for receiving a reinforcing bar positioned below the upper and lower reinforcing bars arranged at right angles from below, and a reinforcing bar mounting section positioned on the upper side. The reinforcing bar restraining part that suppresses the reinforcing bar from above and the grounding part that contacts the formwork surface and the foundation surface are integrally formed, and the reinforcing bar suppressing part is placed on one side above the reinforcing bar placing part and the reinforcing bar is placed. A spacer is formed by arranging a grounding portion on the lower side of the other side of the portion.

[0005]

According to the present invention, the reinforcing bar placing part for receiving the reinforcing bar located at the lower side of the vertically arranged vertical reinforcing bars from below, the reinforcing bar suppressing section for suppressing the reinforcing bar positioned at the upper side from above, the formwork surface and The grounding part that contacts the foundation surface is integrally formed, and the reinforcing bar restraining part is arranged above one side of the reinforcing bar placing part and the grounding part is arranged below the other side of the reinforcing bar placing part to form a spacer. Since this structure is configured, when the spacer is arranged at the intersection of the vertically arranged reinforcing bars, the upper and lower reinforcing bars are firmly held by the reinforcing bar placing section and the reinforcing bar restraining section, and are firmly fixed. Moreover, since the reinforcing bar restraint part is formed above one side of the reinforcing bar placing part and the grounding part is formed below the other side, the spacer as a whole faces downward with the distance from the grounding part to the reinforcing bar placing part being the moment arm. Is applied, and this force acts so as to push the reinforcing bar restraining portion downward, so that the fixing force acts more firmly.

Further, by connecting a plurality of such spacers at a constant pitch, the spacers can be arranged at a plurality of positions at a time, and the pitch of the reinforcing bars can be accurately arranged. Like And in this case,
Since the intersections of the upper and lower reinforcing bars that are orthogonally arranged can be fixed only by disposing the spacers, the reinforcing bar binding work can be omitted.

[0007]

1 and 2 show a first embodiment, FIG. 1 is a perspective view, and FIG. 2 is a side view in use. This spacer is made by bending the two legs of the U-shaped fork (1) made of steel wire in the same direction near the base end.
A U-shaped member located at the upper end of the fork body (1) is formed by bending two legs in a portion closer to the tip than the bent portion in a direction opposite to the bending direction toward the base end and forming a substantially crank shape. The connecting portion is formed on the reinforcing bar restraining portion (2), the leg portion located between the two bent portions is formed on the reinforcing rod mounting portion (3), and the tip end portion of the leg portion is formed on the grounding portion (4). That is, the reinforcing bar rest (3) is sandwiched, and the reinforcing bar restraining part (2) is provided on one side.
However, the grounding portions (3) are respectively located on the other side.
The base end side bent portion and the tip end side bent portion of the leg portion are bent so that the angle formed by the steel wire forming the leg portion is an obtuse angle. Further, the grounding portion (4) is formed by bending the tip so that the end surface of the steel wire does not come into contact with the surface of the formwork and bite into it.

The spacer body (1) thus formed is
It is used as follows. That is, the upper reinforcing bars (5) of the vertically arranged upper and lower reinforcing bars (5) and (6) are inserted in a state of being sandwiched by a pair of legs, and the reinforcing bar mounting portion (3) is passed under the lower reinforcing bars (6). In this state, the grounding part (4) is placed in contact with the mold surface.
Then, in the spacer body (1), a force in the gravitational direction acting on the reinforcing bar mounting portion (3) causes a tilting moment about the grounding portion (4) as a fulcrum to connect the upper ends of the pair of legs. Reinforcing bar restraint part (2) composed of the U-shaped connecting part
(5) is pressed down from above, while reinforcing bar rest (3)
Since the lower reinforcing bar (6) is supported from below, a fixing force is generated at the intersection of the upper and lower reinforcing bars (5) and (6). As a result, it is possible to omit the binding work by the binding line at the intersection.

The reinforcing bars are arranged in a grid pattern, and by arranging the spacer main body (1) at the zigzag-shaped intersections or all the intersections among all the intersections, the spacers act on the respective spacers. The moments in the tilting direction with the grounding part (4) as a fulcrum act on each other, and the upper and lower rebars (5) and (6) arranged in a rectangular grid are held in a state of being floated by a certain height from the upper surface of the formwork surface. can do. That is, a certain fog size can be reliably ensured. Moreover, even when walking on the reinforcing bars arranged in a rectangular lattice pattern and jumping up due to the elastic force of the reinforcing bars, the spacer body is fitted to the upper and lower reinforcing bars (5) and (6), Reinforcing bar (5) with spacer body (1) located above and below
There is no departure from (6).

FIG. 3 shows a perspective view of the second embodiment, in which a plurality of the above-mentioned spacer bodies (1) are arranged side by side at a predetermined pitch (P), and the reinforcing bar restraining portion (of each spacer body (1) ( The upper ends of 2) are fixed to the connecting rod (7). By doing so, the arrangement pitch of the upper reinforcing bars (5) can be set accurately, and the work of binding and fixing a plurality of intersections can be performed by one operation. Labor can be saved.

FIG. 4 shows a perspective view of the third embodiment, in which a pair of steel wires (8) and (9) are arranged so as to sandwich the lower reinforcing bar (6) and both steel wires (8) and (9) are arranged. ) Is bent into a substantially V shape to form a reinforcing bar restraining part (2) that restrains the upper reinforcing bar (5), and the intermediate portions of both steel wires (8) and (9) are connected to each other by a connecting rod (7). To connect the lower rebar (6) from below to form the rebar mounting part (3),
Bend the other ends of both steel wires (8) and (9) to form the grounding part (4)
It was formed in.

FIG. 5 shows a perspective view of a fourth embodiment, which is the same as the third embodiment except that a pair of steel wires (8) and (9) are arranged with a predetermined reinforcing bar arrangement size. Is. In this case, the lateral restraining force of the lower reinforcing bar (6) is reduced, but the steel wire (8) (9) is positioned on the opposite side of the lower reinforcing bar (6) when it is placed at the adjacent intersection. By setting so that it can be set, the lateral movement of the lower reinforcing bar can be suppressed. In addition,
In this case, if the connecting rod (7) is projected to the lateral side of the steel wires (8) and (9) and projections are formed on this projection and the distance between the projections is set to a predetermined dimension, one spacer metal fitting is formed. Can handle two types of reinforcing bar pitch.

6 and 7 show a fifth embodiment, FIG. 6 is a perspective view, and FIG. 7 is a side view in use. This is a pair of steel wires (8) (9) arranged along both sides of the upper reinforcing bar (5).
Each of the intermediate portions of the steel wire is bent obliquely downward, and a portion of one steel wire (8) near the tip is bent obliquely upward so as to be substantially V-shaped, and the reinforcing bar mounting portion (3) is configured. The tip portion of the other steel wire (9) is folded back so as to be substantially J-shaped to form the grounding portion (4) and form one spacer unit (10). Both spacer units (10), which are arranged along both sides of the upper reinforcing bar (5) by arranging two spacer units (10) at a constant pitch in a direction orthogonal to the pair of steel wires (8) and (9). Steel Wire (8) (9)
The upper surface of the horizontal part of is connected by the connecting rods (7a) and (7b) arranged at regular intervals in the longitudinal direction, and is located between the pair of steel wires (8) and (9) in each spacer unit (10). The connecting rods (7a), (7b) are formed in the reinforcing bar restraining portion (2). Therefore, in this embodiment, one spacer unit (10) and a portion of the connecting rods (7a) and (7b) located between the steel wires (8) and (9) of each spacer unit (10) are connected to the spacer body (1). ) Will be configured.

In the case of this embodiment, the reinforcing bar mounting portion (3)
The vertical distance between the upper surface of the horizontal portion of the steel wire and the upper surface of the V-shaped bent portion is set to the sum of the diameters of the upper and lower reinforcing bars crossed with each other or a dimension slightly larger than the sum. In addition, the vertical distance between the upper surface of the V-shaped bent portion forming the reinforcing bar mounting portion (3) and the lower surface of the grounding portion (4) folded back in the J shape is equal to or greater than the fog dimension of concrete. Is also set to a slightly larger size.

When using this spacer, a connecting rod
Grasp (7a) and (7b) with your hands, and check each spacer unit (10).
Insert the upper rebar (5), which is arranged at a constant pitch between the steel wires (8) and (9), and scoop the lower rebar (6) at the rebar mounting part (3). To activate. Then, the lower reinforcing bar (6) is supported from below by the reinforcing bar placing part (3), and the upper reinforcing bar (6) is supported.
(5) is a reinforcing rod restraining part (2) composed of connecting rods (7a) and (7b) located between the steel wires (8) and (9) of each spacer unit (10), and is restrained from above, (5) and (6) will be firmly fixed.

In the above embodiment, the two spacer units (10) are connected by the connecting rods (7a), (7b), but three or more spacer units (10) are arranged side by side. Good. However, for ease of handling, it is desirable that the number of spacer units (10) connected by a set of connecting rods (7a), (7b) is about 2 to 4.

Further, in this embodiment, a spacer unit is composed of a pair of connecting rods (7a) and (7b) arranged at regular intervals.
Although (10) is connected, it may be connected by one connecting rod (7). However, in the case of a plurality of connecting rods (7a), (7b) that are spaced at regular intervals, it is easy to grasp by hand, so it is desirable that two or more connecting rods connect the spacer units (10).

Further, in the above-mentioned embodiment, the reinforcing bar spacer is buried in a slab such as a floor or a ceiling. However, it may be used as a reinforcing bar spacer buried in a slab forming an inclined portion such as a roof or stairs.

[0019]

According to the present invention, a reinforcing bar placing portion for receiving a reinforcing bar positioned on the lower side of the vertically arranged vertical reinforcing bars from below, and a reinforcing bar suppressing section for suppressing the reinforcing bar positioned on the upper side from above,
The grounding part that contacts the formwork surface and foundation surface is integrally formed, and the reinforcing bar restraining part is arranged above one side of the reinforcing bar placing part and the grounding part is arranged below the other side of the reinforcing bar placing part. Since the spacer is configured as such, if this spacer is arranged at the intersection of the vertically arranged upper and lower rebars, the upper and lower rebars are sandwiched between the rebar mounting portion and the rebar restraining portion, and are securely fixed. It will be. Moreover, since the reinforcing bar restraining part is formed on one side above the reinforcing bar placing part and the grounding part is formed on the other side below, the spacer as a whole faces downwards with the distance from the grounding part to the reinforcing bar placing part as the moment arm. A force acts, and this force acts so as to push the reinforcing bar restraining portion downward, so that the fixing force acts more firmly. As a result, the spacer that sets the reinforcing bar disposition height will be integrated with the reinforcing bar that is crossed, so that this spacer will not come off and the reinforcing bar disposition height will not change, and the fog size of concrete can be reduced. It can be maintained reliably.

Further, as described above, since the intersections of the reinforcing bars intersecting in the orthogonal state are clamped and fixed from above and below, the work of binding the reinforcing bars by the steel wires at the intersections can be omitted,
The work of arranging the reinforcing bars can be simplified and the work efficiency improves.

Further, by connecting a plurality of such spacers at a constant pitch, the spacers can be arranged at a plurality of positions at one time, and the arrangement pitch of the reinforcing bars can be set accurately. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is a side view of the first embodiment in use.

FIG. 3 is a partially cutaway perspective view of a second embodiment.

FIG. 4 is a perspective view of a third embodiment.

FIG. 5 is a perspective view of a fourth embodiment.

FIG. 6 is a perspective view of a fifth embodiment.

FIG. 7 is a side view of the sixth embodiment in use.

8 (A) and 8 (B) are perspective views showing a conventional technique.

[Explanation of symbols]

1 ... Spacer body, 2 ... Reinforcing bar restraining section, 3 ... Reinforcing bar placing section,
4 ... grounding part, 5 ... upper reinforcing bar, 6 ... lower reinforcing bar, 7 ... connecting rod.

Claims (3)

[Claims] 1. A spacer for holding rebars arranged in an orthogonal state in a state of being separated from a formwork surface or a foundation surface by a certain size above, and which receives a rebar (6) located on the lower side from below. Table
(3), the reinforcing bar restraining part (2) that restrains the reinforcing bar (5) located on the upper side from above, and the grounding part (4) that contacts the formwork surface and the foundation surface are integrally formed to rebar mounting A spacer for a concrete-reinforcing bar in which a reinforcing bar restraining part (2) is arranged above one side of the placing part (3) and a grounding part (4) is arranged below the other side of the reinforcing bar placing part (3). 2. A reinforcing bar placing part (3) for receiving the reinforcing bar (6) located on the lower side from below, a reinforcing bar restraining part (2) for suppressing the reinforcing bar (5) located on the upper side from above, and a formwork surface. And the grounding part (4) that contacts the foundation surface are integrally formed, and the reinforcing bar restraining part (2) is arranged above one side of the reinforcing bar mounting part (3) and the reinforcing bar mounting part (3) Spacer body with the grounding part (4) arranged below the other side
Multiple spacers (1) are installed side by side at a fixed pitch, and each spacer body (1)
A reinforcing bar spacer for burying concrete, which is integrally formed by connecting the reinforcing bar restraint parts (4). 3. The spacer for a concrete burying reinforcing bar according to claim 2, wherein the connecting tool for connecting the reinforcing bar restraining parts (4) is composed of a pair of connecting rods (7) arranged at a predetermined distance.