Spacer for bar arrangement

Abstract

To provide a spacer for bar arrangement capable of coping with a plurality of reinforcements of different sizes.SOLUTION: This spacer 1 for bar arrangement has a support part 3 for fitting and supporting the reinforcing bar, and the support part 3 is a plurality of arms 11121314 extending from the outside toward a recessed surface 10A part and a 10B part for receiving the reinforcing bar and a position opposed to the recessed surface 10A part and the 10B part and corresponding to respective outer shapes of the plurality of reinforcing bars of different sizes supported by the recessed surface 10A part and the 10B part. And a plurality of arms 11,12,13,14 which are elastically deformed when the plurality of reinforcing bars of different sizes are respectively fitted into the support part 3, and in which the arms 11,12,13,14 extending to positions corresponding to respective outer shapes of the plurality of reinforcing bars of different sizes are elastically restored to original positions to support the reinforcing bars.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a reinforcing bar spacer used in the construction of reinforced concrete structures. [Background technology]

[0002] In the construction of reinforced concrete structures, reinforcing bar spacers are used to place reinforcing bars in required positions and ensure an appropriate cover thickness (the distance from the concrete surface to the reinforcing bars). Reinforcing bar spacers have been developed, for example, as described in Patent Documents 1 and 2.

[0003] The reinforcing bar spacer described in Patent Document 1 has a support part that fits and supports the reinforcing bar, and legs whose length corresponds to the cover thickness between the reinforcing bar fitted in the support part and the leg part, making it possible to maintain the cover thickness required for pouring concrete. Also, the reinforcing bar spacer described in Patent Document 2 has a base that is formed somewhat wide in the width direction, a reinforcing bar support part that is formed in a roughly cylindrical shape to support the reinforcing bar, and a form support part that faces and supports the formwork used to form the side of the footing, and the reinforcing bar is engaged with the reinforcing bar support part to support the reinforcing bar at a predetermined distance from the formwork and the basal concrete. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-111953 [Patent Document 2] Patent No. 3036692 Summary of the Invention [Problem to be solved by the invention]

[0005] The reinforcing bar spacers described in Patent Documents 1 and 2 above can easily support reinforcing bars by simply fitting them into the support parts. However, the reinforcing bars used for reinforcing bars in the construction of reinforced concrete structures come in a variety of sizes, such as deformed steel bars with nominal diameters of D10, D13, and D16. Therefore, it is necessary to prepare reinforcing bar spacers according to each size, which makes management cumbersome.

[0006] Therefore, an object of the present invention is to provide a reinforcing bar spacer that can accommodate a plurality of different sizes of reinforcing bars. [Means for solving the problem]

[0007] The reinforcement spacer of the present invention is a reinforcement spacer having a support portion into which reinforcing bars are inserted and supported, and the support portion has a concave surface that receives the reinforcing bars and a plurality of arms that extend from the outside toward positions facing the concave surface and corresponding to the respective outer shapes of the plurality of different sized reinforcing bars supported by the concave surface, and the arms elastically deform when the plurality of different sized reinforcing bars are inserted into the support portion, and the arms that extend to positions corresponding to the respective outer shapes of the plurality of different sized reinforcing bars elastically return to their original positions to support the reinforcing bars.

[0008] According to the reinforcement spacer of the present invention, when multiple reinforcing bars of different sizes are fitted into the support part, the multiple arms extending from the outside toward positions corresponding to the respective outer shapes of the multiple reinforcing bars of different sizes elastically deform, causing the reinforcing bars to reach the concave surface of the support part, and then the arms extending to positions corresponding to the respective outer shapes of the multiple reinforcing bars of different sizes elastically return to their original positions, thereby supporting the reinforcing bars.

[0009] Here, it is desirable that the cross section of the concave surface that receives the reinforcing bar be formed by a plurality of curved surfaces with different curvatures, so that when receiving a plurality of reinforcing bars of different sizes, the reinforcing bar is stably supported by the curved surface of the plurality of curved surfaces with different curvatures that is closest to the outer shape of the reinforcing bar. [Effects of the Invention]

[0010] According to the reinforcing bar spacer of the present invention, it is possible to use one type of reinforcing bar spacer to accommodate a plurality of different sizes of reinforcing bars. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a reinforcement spacer according to an embodiment of the present invention. [Figure 2] 1 is a perspective view of a reinforcement spacer according to an embodiment of the present invention. [Figure 3] 1 is a front view of a reinforcement spacer according to an embodiment of the present invention. FIG. [Figure 4] 1 is a plan view of a reinforcement spacer according to an embodiment of the present invention. [Figure 5] FIG. 2 is a right side view of the reinforcement spacer according to the embodiment of the present invention. [Figure 6] FIG. 2 is a left side view of the reinforcement spacer according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] 1 and 2 are perspective views of a reinforcement spacer according to an embodiment of the present invention, FIG. 3 is a front view, FIG. 4 is a plan view, FIG. 5 is a right side view, and FIG. 6 is a left side view.

[0013] 1 to 6, a reinforcement spacer 1 according to an embodiment of the present invention has a support portion 3 into which reinforcing bars 2A, 2B, and 2C of different sizes (see FIG. 3) are fitted and supported, and leg portions 4 that support the support portion 3. The reinforcement spacer 1 is made of synthetic resin. The reinforcing bars 2A, 2B, and 2C are deformed steel bars with nominal diameters of D10, D13, D16, and the like, for example. The support portion 3 supports the reinforcing bars 2A, 2B, and 2C that extend horizontally.

[0014] The support part 3 has a receiving part 10 in the shape of a cylinder that extends in the extension direction (horizontal direction) of the reinforcing bars 2A, 2B, 2C and is cut horizontally. The receiving part 10 has a plurality of concave surfaces 10A, 10B that receive the reinforcing bars 2A, 2B, 2C. When the concave surfaces 10A, 10B are cut vertically, the cross sections are curved surfaces with different curvatures. The concave surface 10A is provided at the lowest part of the receiving part 10. The concave surfaces 10B are provided on both sides of the concave surface 10A.

[0015] The concave surface 10A has a curvature cross-section that corresponds to the outer shape of the reinforcing bar 2A of the smallest size (e.g., nominal diameter D10) that the reinforcement spacer 1 is compatible with. The concave surface 10B has a curvature cross-section that corresponds to the outer shape of the reinforcing bar 2C of the largest size (e.g., nominal diameter D16) that the reinforcement spacer 1 is compatible with. In this way, the cross-sections of the concave surfaces 10A and 10B that receive the reinforcing bars 2A, 2B, and 2C are formed by a plurality of curved surfaces with different curvatures. Therefore, when receiving the reinforcing bars 2A, 2B, and 2C of a plurality of different sizes, the reinforcing bars 2A, 2B, and 2C are stably supported by the curved surface of the plurality of curved surfaces 10A and 10B with different curvatures that is closest to the outer shape of the reinforcing bars 2A, 2B, and 2C.

[0016] The support unit 3 also includes multiple arms 11, 12, 13, and 14. The arms 11, 12, 13, and 14 extend obliquely from the outside to the inside toward positions facing the concave surfaces 10A and 10B and corresponding to the outer shapes of the reinforcing bars 2A, 2B, and 2C of different sizes supported by the concave surfaces 10A and 10B. The tip surfaces 11A and 12A of the arms 11 and 12 abut against the outer surface of the reinforcing bar 2A with the smallest size (e.g., nominal diameter D10). The tip surface 13A of the arm 13 abuts against the outer surface of the reinforcing bar 2B with the next largest size (e.g., nominal diameter D13). The tip surface 14A of the arm 14 abuts against the outer surface of the reinforcing bar 2C with the largest size (e.g., nominal diameter D16).

[0017] When reinforcing bars 2A, 2B, 2C of different sizes are fitted into support portion 3, arms 11, 12, 13, 14 elastically deform toward the outside of reinforcing bars 2A, 2B, 2C, and reinforcing bars 2A, 2B, 2C are guided to concave surfaces 10A, 10B by elastically deformed arms 11, 12, 13, 14. Arms 11, 12, 13, 14, which extend to positions corresponding to the respective outer shapes of reinforcing bars 2A, 2B, 2C of different sizes, then elastically return to their original positions to support the reinforcing bars.

[0018] For example, when reinforcing bar 2A is fitted into support portion 3, arms 11, 12, 13, and 14 elastically deform outward, guiding reinforcing bar 2A to concave surface 10A. At this time, as reinforcing bar 2A passes arms 14 and 13, arms 14 and 13 elastically return to their original positions one after another. Then, when reinforcing bar 2A reaches concave surface 10A, arms 11 and 12 also elastically return to their original positions, and reinforcing bar 2A is supported by tip surfaces 11A and 12A of arms 11 and 12 and concave surface 10A.

[0019] Furthermore, when the reinforcing bar 2B is fitted into the support portion 3, the arms 11, 12, 13, and 14 elastically deform outward, guiding the reinforcing bar 2B to the concave surface 10B. At this time, as the reinforcing bar 2B passes through the arms 14 and 13, the arms 14 and 13 elastically return to their original positions one after the other. Then, when the reinforcing bar 2B reaches the concave surface 10B, the arms 11 and 12 remain elastically deformed, but the reinforcing bar 2B is supported by the tip surface 13A of the arm 13 and the concave surface 10B.

[0020] Furthermore, when the reinforcing bar 2C is fitted into the support portion 3, the arms 11, 12, 13, and 14 elastically deform outward, guiding the reinforcing bar 2C to the concave surface 10B. At this time, when the reinforcing bar 2C passes through the arm 14, the arm 14 elastically returns to its original position. Then, when the reinforcing bar 2C reaches the concave surface 10B, the arms 11, 12, and 13 remain elastically deformed, but the reinforcing bar 2C is supported by the tip surface 14A of the arm 14 and the concave surface 10B.

[0021] The leg portion 4 abuts against reference surfaces C1 and C2, which are the surfaces of the concrete, and supports the support portion 3 at a predetermined distance from the reference surfaces C1 and C2. Reference surface C1 is, for example, the surface of the basin concrete. Reference surface C2 is, for example, the surface of the formwork. The leg portion 4 has a bottom plate portion 20 that abuts against the reference surface C1, and a formwork abutment portion 30 that abuts against the reference surface C2. The receiving portion 10 is provided on a columnar portion 40 that stands on the bottom plate portion 20 and crosses it in a crisscross pattern.

[0022] The bottom plate portion 20 has two V-shaped notches 21 at its end for confirming the placement positions of the reinforcing bars 2A, 2B, and 2C supported by the reinforcing bar spacer 1. The line connecting the vertices of the V-shapes of the two notches 21 is parallel to the placement direction of the reinforcing bars 2A, 2B, and 2C supported by the support portion 3. The placement center is marked out in advance on the basing concrete, and by confirming that this center line C3 (see Figure 4) coincides with the vertices of the V-shapes of the two notches 21, the reinforcing bars 2A, 2B, and 2C are placed parallel to the placement center. Note that, to make confirmation easier, the notches 21 are not placed directly below the support portion 3 but are offset by a predetermined amount (for example, 10 mm).

[0023] Furthermore, a fixing hole 22 for fixing the reinforcement spacer 1 on the reference surface C1 is provided at the end of the bottom plate portion 20 opposite the formwork abutment portion 30. The reinforcement spacer 1 can be fixed to the reference surface C1 of basal concrete or the like using this fixing hole 22 with a concrete nail or the like. In this case, the fixing hole 22 is provided at a position away from the support portion 3 in a plan view to make it easier to drive the concrete nail with a nail gun.

[0024] The formwork abutment portion 30 has a lower abutment plate 31 and an upper abutment plate 32 provided above and parallel to the lower abutment plate 31. The tip surface 31A of the lower abutment plate 31 and the tip surface 32A of the upper abutment plate 32 are parallel to the direction in which the reinforcing bars 2A, 2B, and 2C supported by the support portion 3 are passed. In addition, the upper abutment plate 32 is formed smaller than the lower abutment plate 31 so that it is easy to check the abutment state between the reference plane C2 and the lower abutment plate 31 and upper abutment plate 32 when viewing the formwork abutment portion 30 from above.

[0025] According to the reinforcement spacer 1 having the above-described configuration, when a plurality of different sized reinforcing bars 2A, 2B, 2C are fitted into the support portion 3, the plurality of arms 11, 12, 13, 14 extending from the outside toward positions corresponding to the respective outer shapes of the plurality of different sized reinforcing bars 2A, 2B, 2C elastically deform, causing the reinforcing bars 2A, 2B, 2C to reach the concave surfaces 10A, 10B of the support portion 3, and then the arms 11, 12, 13, 14 extending to positions corresponding to the respective outer shapes of the plurality of different sized reinforcing bars 2A, 2B, 2C elastically return to their original positions, thereby supporting the reinforcing bars 2A, 2B, 2C.

[0026] At this time, the reinforcement spacer 1 is fixed with concrete nails or the like using the fixing holes 22, with the formwork abutment portion 30 abutting against reference surface C2 such as the formwork surface, and the bottom plate portion 20 abutting against reference surface C1 such as the surface of basal concrete, and the reinforcing bars 2A, 2B, 2C are placed in the required positions, ensuring an appropriate cover thickness. In this way, with the reinforcement spacer 1, it is possible to accommodate a plurality of different sizes of reinforcing bars 2A, 2B, 2C by simply preparing one type of reinforcement spacer 1, and it is possible to easily ensure an appropriate cover thickness. [Industrial Applicability]

[0027] The present invention is useful as a reinforcing bar spacer used in the construction of reinforced concrete structures, and is particularly suitable as a reinforcing bar spacer that can accommodate a number of different sizes of reinforcing bars and easily ensure an appropriate cover thickness. [Explanation of symbols]

[0028] 1 Reinforcement spacer 2A, 2B, 2C Reinforced concrete 3 Support part 4 legs 10 Receiving Department 10A,10B concave 11,12,13,14 Arm 11A,12A,13A,14A Tip surface 20 Bottom plate part 21 Notch 22 fixing hole 30 Formwork contact part 31 Lower abutment plate 32 Upper abutment plate 40 Column part

Claims

1. A reinforcing bar spacer having a support portion into which a reinforcing bar is fitted and supported, The support portion is a concave surface for receiving the reinforcing bar; a plurality of arms extending from the outside toward positions facing the concave surface and corresponding to the respective outer shapes of the plurality of different sized reinforcing bars supported on the concave surface, wherein the arms elastically deform when the plurality of different sized reinforcing bars are fitted into the support portions, and the arms extending to the positions corresponding to the respective outer shapes of the plurality of different sized reinforcing bars elastically return to their original positions to support the reinforcing bars; A reinforcing bar spacer having the structure.

2. 2. The spacer for reinforcing bars according to claim 1, wherein the cross section of the concave surface is formed by a plurality of curved surfaces having different curvatures.

3. 3. The reinforcing bar spacer according to claim 1, further comprising legs that abut against a reference surface that is the surface of concrete and support the support portion at a predetermined distance from the reference surface.

Images