JP2005207029A - Reinforcement spacer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement spacer capable of easily adjusting the thickness of cover concrete. <P>SOLUTION: In the reinforcement spacer 1 equipped with a spacer body section 4 supporting reinforcements 3 arranged on a concrete placing surface 2 placing the concrete thereon and arranged upward of the concrete placing surface 2 and a recess section 5 formed on the upper surface of the spacer body section 4 and, at the same time, fitting the reinforcements 3 therein, a detachable intervening member 6 supporting the reinforcements 3 is made to intervene between the bottom of the recess section 5 or at least one of upper surfaces of the spacer body section 4 and the bottom of the reinforcements 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a reinforcing bar spacer that supports a reinforcing bar embedded in concrete and secures a predetermined cover thickness.

  Conventionally, as a reinforcing bar spacer for securing the cover thickness of the slab bottom, a reinforcing bar spacer in which a concave portion (reinforcing bar supporting portion) is joined to a dice-shaped spacer body has been proposed. The recess is a member that detachably supports the reinforcing bar, and is formed, for example, in a substantially circular shape in which one side is opened by bending an elastic steel wire (see, for example, Patent Document 1). .

According to the reinforcing bar spacer provided with the recess material described above, the reinforcing bar is received in the recess by fitting the reinforcing bar from the portion where the recess is opened. As a result, it is difficult for the reinforcing bars to come off from the reinforcing bar spacer, and the cover thickness can be reliably ensured.
JP 2002-332714 A (page 2-3, FIG. 1)

  However, in the above-mentioned conventional reinforcing bar spacer, the cover thickness of the reinforcing bar is determined by the height of the spacer body. Therefore, when changing the cover thickness, prepare another reinforcing bar spacer with a different spacer body height. There is a problem that needs to be done. In particular, when forming a small step (about 10 mm) on the bottom of the slab, it is necessary to make the lower cover thickness slightly larger than the higher cover thickness. In the case of the size, a rebar spacer has to be manufactured by custom, which increases the cost.

  The present invention has been made in consideration of the above-described conventional problems, and an object thereof is to provide a reinforcing bar spacer that can easily adjust the cover thickness of the reinforcing bar at low cost.

  According to the first aspect of the present invention, there is provided a spacer main body portion that is disposed on a concrete placement surface on which concrete is placed and supports a reinforcing bar arranged above the concrete placement surface; In the rebar spacer formed on the upper surface and provided with a recess into which the rebar is fitted, between the bottom surface of the recess or the upper surface of the spacer main body and the bottom surface of the rebar, A detachable interposition member that supports the reinforcing bar is interposed.

  According to a second aspect of the present invention, in the reinforcing bar spacer according to the first aspect, the concave portion into which the reinforcing bar is fitted is formed long in a substantially vertical direction.

  According to the reinforcing bar spacer according to the invention of claim 1, a spacer main body part that supports the reinforcing bar arranged on the concrete placing surface on which the concrete is placed and arranged above the concrete placing surface; In the reinforcing bar spacer which is formed on the upper surface of the spacer main body and has a recess into which the reinforcing bar is fitted, the reinforcing bar is provided between at least one of the bottom surface of the concave portion or the upper surface of the spacer main body and the bottom surface of the reinforcing bar. Therefore, the cover thickness of the reinforcing bar supported by the reinforcing bar spacer is determined by the thickness of the interposed member. By interposing, the cover thickness of the reinforcing bar can be easily adjusted without changing the spacer main body and the recess.

  Further, according to the reinforcing bar spacer according to the second aspect of the present invention, since the concave portion into which the reinforcing bar is fitted is formed long in the substantially vertical direction, the reinforcing bar is fitted into the concave portion even if a thick interposed member is interposed. Therefore, the adjustment range of the cover thickness of the reinforcing bar by the interposed member can be increased.

  Hereinafter, embodiments of a reinforcing bar spacer according to the present invention will be described with reference to the drawings.

  FIG. 1 shows an entire reinforcing bar spacer 1 according to the present invention. The reinforcing bar spacer 1 is disposed on a concrete placing surface 2 on which concrete is placed and is placed above the concrete placing surface 2. 3 is interposed between the bottom surface of the reinforcing bar 3 and the bottom surface of the reinforcing bar 3. It comprises a detachable interposition member 6 that supports it. In addition, the concrete placement surface 2 of the present invention is a concept including not only the inner surface of the formwork but also the ground when placing concrete directly on the ground or the like.

  The spacer main body 4 is formed by extruding mortar, and is formed in a column shape extending in the horizontal direction. The cross-sectional shape of the spacer main body 4 is rounded at the four corners, and has an upper side, a side side, and a lower side. Each center is recessed in a curve.

  The recess 5 is formed of a thin iron plate having elasticity, and is formed long in a substantially vertical direction. The concave portion 5 includes a base portion 7 superimposed on a recessed upper end surface of the spacer main body portion 4, a main body gripping portion 8 that grips the upper end portion of the spacer main body portion 4, and a reinforcing bar gripping portion 9 that grips the reinforcing bar 3. It is configured.

  The base portion 7 is disposed along the center of the upper end surface of the spacer body portion 4 and is formed in a semi-cylindrical shape extending in the horizontal direction. The main body gripping portion 8 projects downward from both sides of the center of the base portion 7 and is formed in a semi-cylindrical shape. A claw portion 8 a that opens outward is formed at the lower end of the main body gripping portion 8. The recess 5 is attached to the spacer main body 4 so that the main body gripping portion 8 grips both upper corners of the spacer main body 4 that are formed round. The reinforcing bar gripping part 9 is projected upward from both sides of both ends of the base part 7, and the opposing reinforcing bar gripping part 9 is formed in a vertically long elliptical shape. The upper end of the opposing reinforcing bar gripping part 9 is open, and the upper end of the reinforcing bar gripping part 9 is formed with a claw part 9 a that opens outward.

  An interposition member 6 made of a resin material, mortar, steel material or the like is removably received inside the recess 5, and the interposition member 6 is interposed between the bottom surface of the recess 5 and the bottom surface of the reinforcing bar 3. The interposition member 6 is placed on the base portion 7, and the reinforcing bar 3 is placed on and supported by the interposition member 6. The interposition member 6 is formed in an elliptical cylindrical shape and extends along the base portion 7.

  Next, a method for using the above-described reinforcing bar spacer 1 will be described.

  First, the main body gripping portion 8 is gripped by the spacer main body portion 4, and the concave portion 5 is attached to the spacer main body portion 4. Specifically, when attached to the spacer main body 4, the semi-cylindrical main body gripping portion 8 temporarily spreads due to the elasticity of the thin iron plate, and the upper end corner of the spacer main body 4 enters the main body gripping portion 8. Then, the spacer body 4 is gripped.

  Next, the interposition member 6 having a predetermined thickness is disposed on the bottom surface of the recess 5. Specifically, the thickness of the interposition member 6 is calculated by subtracting the height from the predetermined cover thickness to the recessed upper end surface of the spacer body 4, and the interposition member 6 having the calculated thickness is obtained. Place on the base 7.

  Next, a plurality of reinforcing bar spacers 1 assembled as described above are arranged on the concrete placing surface 2 at equal intervals, and the reinforcing bars 3 arranged on the concrete placing surface 2 are supported by the reinforcing bar spacer 1. Specifically, the reinforcing bar 3 is fitted into the reinforcing bar gripping part 9 from the upper end of the opened reinforcing bar gripping part 9, and the reinforcing bar 3 is placed on the interposition member 6, and the bottom surface of the recess 5 and the bottom surface of the reinforcing bar 3. The interposition member 6 is interposed between the two. When attaching the reinforcing bar 3, the reinforcing bar gripping part 9 temporarily spreads outward due to the elasticity of the thin steel plate, and when the reinforcing bar 3 completely enters between the opposing reinforcing bar gripping parts 9, it returns to its original state and grips the reinforcing bar 3.

  According to the reinforcing bar spacer 1 having the above-described configuration, the spacer main body 4 that is disposed on the concrete placing surface 2 on which concrete is placed and supports the reinforcing bars 3 that are arranged above the concrete placing surface 2. In the reinforcing bar spacer 1 which is formed on the upper surface of the spacer main body 4 and is provided with the concave portion 5 into which the reinforcing bar 3 is fitted, the reinforcing bar 3 is interposed between the bottom surface of the concave portion 5 and the bottom surface of the reinforcing bar 3. A supportable removable member 6 is interposed. For this reason, the cover thickness of the reinforcing bar 3 supported by the reinforcing bar spacer 1 is determined by the thickness of the interposition member 6. Accordingly, by selecting and interposing the intervening member 6 having an appropriate thickness, the cover thickness of the reinforcing bar 3 can be easily adjusted without changing the spacer main body 4 and the recess 5.

  Moreover, since the recessed part 5 in which the reinforcing bar 3 is fitted is formed long in a substantially vertical direction, the reinforcing bar 3 is fitted in the recessed part 5 even if the thick interposing member 6 is interposed. Thereby, the adjustment width | variety of the cover thickness of the reinforcing bar 3 by the interposed member 6 can be enlarged.

  As mentioned above, although embodiment of the reinforcing bar spacer which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the above-described embodiment, the concave portion 5 is made of a thin steel plate having elasticity, and includes the base portion 7, the main body gripping portion 8, and the reinforcing bar gripping portion 9. It may be made of a metal wire having elasticity, and this one metal wire may be bent into a substantially circular shape with a part open, and then joined to both ends of the spacer body. In this case, the interposed member is placed on the upper surface of the spacer body.

  In the above-described embodiment, the spacer body 4 and the recess 5 are formed separately, and the recess 5 is attached to the spacer body 4. However, in the present invention, the spacer body 4 and the recess 5 are provided. And may be integrally formed in advance. In the embodiment described above, the spacer main body 4 is formed by molding mortar, but the present invention may be a resin spacer main body or a metal spacer main body.

It is a perspective view showing embodiment of the reinforcing bar spacer which concerns on this invention.

Explanation of symbols

1 Reinforcing Bar Spacer 2 Concrete Placing Surface 3 Reinforcing Bar 4 Spacer Body 5 Recess 6 Intervening Member

Claims (2)

A spacer main body disposed on a concrete placement surface on which concrete is placed and supporting a reinforcing bar arranged above the concrete placement surface, and formed on the upper surface of the spacer main body and In the rebar spacer provided with a recess into which the rebar is fitted,
A rebar spacer, wherein a detachable interposition member for supporting the rebar is interposed between at least one of the bottom surface of the recess or the top surface of the spacer main body and the bottom surface of the rebar. The reinforcing bar spacer according to claim 1,
The rebar spacer, wherein the recess into which the rebar is fitted is formed to be long in a substantially vertical direction.

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