Reinforcing bar spacer

Abstract

To make it easily and quickly be attached to an intersection portion Cr of a reinforcing bar R in a spacer 10 for a reinforcing bar.SOLUTION: A spacer 10 for reinforcing bars of the present invention is made of synthetic resin attached to intersections Cr of the reinforcing bars R in which a plurality of vertical bars Ve and horizontal bars Ho are assembled in a vertical and horizontal grid pattern, and comprise: a spacer main body 11 extending in the front and rear direction crossing with the horizontal bars Ho; a vertical gutter-shaped fitting portion 12 into which the vertical bar Ve is detachably fitted; and a hook shaped locking portion 13 facing an opening direction of the fitting portion 12 so as to be hooked and locked by the horizontal bar Ho. The fitting portion 12 is connected to the spacer main body 11 via a bridge portion 16.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a reinforcing bar spacer that is attached to the intersections of reinforcing bars assembled from multiple vertical and horizontal bars in a vertical and horizontal lattice pattern in reinforced concrete construction in architecture and civil engineering to maintain a constant distance between the reinforcing bars and formwork and ensure a sufficient cover thickness. [Background technology]

[0002] Conventionally, a wide variety of reinforcing bar spacers of this type have been seen, but most of them are fitted or clamped between the vertical and horizontal reinforcing bars at the intersections of the reinforcing bars (see, for example, Patent Documents 1 and 2, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Jpn. Jpn. Published No. 58-17059 [Patent Document 2] Jpn. Jpn. Published No. 57-20325 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the reinforcing bar spacer described in the above patent document, when attaching it to the intersection of the reinforcing bars, two actions must be performed: first, hook the hook-shaped locking part onto the horizontal bar, then twist (turn) the spacer body around the horizontal bar, and then fit the fitting part into the vertical bar. For this reason, there is room for improvement in terms of the speed of the installation work. [Means for solving the problem]

[0005] The present invention has as its technical object the provision of a reinforcing bar spacer which has been improved upon by examining the current situation as described above.

[0006] The present invention relates to a synthetic resin reinforcing bar spacer (10) to be attached to an intersection (Cr) of a reinforcing bar (R) which is an assembly of a plurality of vertical bars (Ve) and horizontal bars (Ho) in a vertical and horizontal grid pattern, the spacer body (11) extending in the front-rear direction intersecting the horizontal bars (Ho), a vertical gutter-shaped fitting portion (12) which expands and deforms to allow the vertical bars (Ve) to be detachably fitted therein, and a hook-shaped locking portion (13) having a tip facing in the forward opening direction of the fitting portion so as to hook and lock onto the horizontal bars (Ho). The spacer body (11) has a pair of left and right support arm portions (14), (14) extending in the front-rear direction, and a connecting portion (15) connecting these support arm portions (14), (14). The locking portion (13) is The pair of left and right support arms (14) (14) The fitting portion (12) is provided on one or both of the left and right support arm portions (14)(14) and the connecting portion (15), and is located within an area partitioned in a U-shape in a plan view by the pair of left and right support arm portions (14),(14) and the connecting portion (15), and is connected to the connecting portion (15) via a bridge portion (16) that allows the fitting portion (12) to deform and expand. Effect of the Invention

[0007] According to the reinforcing bar spacer of the present invention, the opening direction of the fitting portion and the protruding direction of the hook-shaped portion of the locking portion are in the same direction, so the operation of hooking the locking portion onto the horizontal bar and the operation of fitting the fitting portion onto the vertical bar can be performed in a single action. This makes the installation workability much better and more user-friendly.

[0008] In addition, if the fitting portion is connected to the spacer body via a bridge portion, the fitting portion can easily expand and deform when fitted into the vertical reinforcement. In other words, when the fitting portion is fitted into the vertical reinforcement, the fitting portion can expand and deform almost independently of the spacer body due to the presence of the bridge portion.

[0009] Therefore, with the reinforcing bar spacer of the present invention, it is possible to fit the engaging portion into the vertical bars of multiple nominal diameters (it goes without saying that the locking portion can be hooked onto the horizontal bars of multiple nominal diameters), and the reinforcing bar spacer of the present invention is highly versatile.

[0010] Furthermore, when the fitting portion is fitted into the vertical reinforcement and the fitting portion is expanded and deformed, the expansion deformation is unlikely to affect the spacer body due to the presence of the bridge portion. Therefore, even in this state, the spacer body does not warp and the gap between the reinforcing bar and the formwork can be kept constant, and an appropriate cover thickness can be obtained. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view of the reinforcing bar spacer in use, viewed from diagonally above and in the front. [Diagram 2] FIG. 2 is a plan view showing the reinforcing bar spacer in use. [Diagram 3] FIG. 2 is a front view of the reinforcing bar spacer. [Figure 4] FIG. 2 is a rear view of the reinforcing bar spacer. [Diagram 5] FIG. 2 is a plan view of the reinforcing bar spacer. [Figure 6] FIG. 2 is a bottom view of the reinforcing bar spacer. [Figure 7] FIG. 2 is a left side view of the reinforcing bar spacer. [Figure 8] FIG. 2 is a right side view of the reinforcing bar spacer. [Figure 9] FIG. 11 is a perspective view showing another example of a reinforcing bar spacer in use, as viewed from diagonally above and in front. [Figure 10] 13 is a plan view showing another example of the left and right support arm portions. FIG. [Figure 11] FIG. 11 is a plan view showing a first modified example of a fitting portion and a bridge portion. [Figure 12] FIG. 11 is a plan view showing a second modified example of the fitting portion and the bridge portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Next, an embodiment of the present invention will be described with reference to the drawings. In the embodiments and claims, terms such as "front-rear," "left-right," and "up-down" are used to specify directions, but in this case, the longitudinal direction of the horizontal stripes Ho is the left-right direction, the horizontal direction intersecting (perpendicular to) the left-right direction is the front-rear direction, and the direction in which the vertical stripes Ve extend is the up-down direction. These terms are used merely for convenience of explanation and do not limit the technical scope of the present invention.

[0013] As shown in Figures 1 to 8, the reinforcing bar spacer 10 is made of synthetic resin and is attached to the intersections Cr of the reinforcing bars R, which are made of multiple vertical bars Ve and horizontal bars Ho assembled in a vertical and horizontal grid pattern in reinforced concrete construction in architecture and civil engineering, to maintain a constant distance between the reinforcing bars R and the formwork F and ensure the covering thickness.

[0014] There is no particular limitation on the size (nominal diameter) of the reinforcing bars R (vertical bars Ve and horizontal bars Ho) to which the reinforcing bar spacer 10 is attached. The reinforcing bar spacer 10 of the embodiment is exemplified as one used in reinforced concrete that constitutes the foundation of a house, and can be attached to intersections Cr of reinforcing bars R that are assembled in a vertical and horizontal grid pattern of horizontal bars Ho with a nominal diameter of 10 to 22 mm and vertical bars Ve with a nominal diameter of 10 to 13 mm.

[0015] The reinforcing bar spacer 10 comprises a spacer body 11 extending in the front-to-rear direction intersecting the horizontal bars Ho, a vertical gutter-shaped fitting portion 12 into which the vertical bars Ve are detachably fitted, and a hook-shaped locking portion 13 facing in the opening direction of the fitting portion 12 (the forward direction in this embodiment) so as to hook onto and lock onto the horizontal bars Ho.

[0016] The spacer body 11 of the embodiment has a pair of left and right support arms 14, 14 extending in the front-rear direction, and a connecting portion 15 connecting the pair of left and right support arms 14, 14. The pair of left and right support arms 14, 14 are arranged in parallel with each other at an appropriate interval in the left-right direction. The rear end side of the left support arm 14 and the front-rear middle portion of the right support arm 14 are connected together via the connecting portion 15.

[0017] When the reinforcing bar spacer 10 is attached to the intersection Cr of the reinforcing bars R, the tip side of each support arm portion 14 (the front end side of the left support arm portion 14 and the rear end side of the right support arm portion 14) can abut against a concrete formwork F. In the embodiment, the left support arm portion 14 extends forward and the right support arm portion 14 extends backward, so that they extend in alternate directions, but this is not limited thereto. For example, the rear side of the left support arm portion 14 may be extended backward and the front side of the right support arm portion 14 may be extended forward, so that the positions of the front ends and the positions of the rear ends of the left and right support arms 14, 14 are aligned (see FIG. 10).

[0018] As described above, the fitting portion 12 in the embodiment is in the form of a vertical gutter into which the vertical muscle Ve is detachably fitted, and is disposed within an area surrounded by a pair of left and right support arm portions 14, 14 and the connecting portion 15. The fitting portion 12 is connected to the spacer body 11 via a bridge portion 16. In this case, the rear side of the fitting portion 12 facing the connecting portion 15 and the connecting portion 15 are integrally connected to each other via the bridge portion 16.

[0019] A vertically long opening groove 17 is formed on the front side of the fitting portion 12, which is opposite to the connecting portion 15. In other words, the fitting portion 12 opens forward. In this embodiment, a cutout portion 18 that is wedge-shaped in a plan view (bottom view) is formed in the fitting portion 12 and the bridge portion 16. That is, the combination of the fitting portion 12 and the bridge portion 16 is bifurcated into two parts separated to the left and right with the cutout portion 18 in between.

[0020] Therefore, when the fitting portion 12 is fitted into the vertical muscle Ve, the fitting portion 12 can expand and deform almost independently of the spacer body 11 (the connecting portion 15 in this embodiment) due to the presence of the bridge portion 16. In particular, since the combination of the fitting portion 12 and the bridge portion 16 is bifurcated to the left and right, the fitting portion 12 can easily expand and deform when the fitting portion 12 is fitted into the vertical muscle Ve. In addition, due to the presence of the bridge portion 16, the influence of the expanding deformation is unlikely to extend to the connecting portion 15 and ultimately the spacer body 11.

[0021] A retaining piece 19 is formed on the inner surface of each of the left and right support arm portions 14 in front of the opening groove 17, extending toward the opening groove 17. The retaining pieces 19 are for preventing the vertical muscle Ve fitted into the fitting portion 12 from coming off, and are configured as a pair on the left and right. The pair of left and right retaining pieces 19, 19 are formed in a V-shape in a plan view (bottom view) so that the left-right distance between them narrows toward the opening groove 17. The space between the pair of left and right support arm portions 14, 14 forms a passage through which the vertical muscle Ve passes, and the distance between the passage can be expanded and opened with the base end side of each retaining piece 19 as a fulcrum by the insertion of the vertical muscle Ve.

[0022] As described above, the locking portion 13 in the embodiment is formed in a hook shape facing toward the opening direction of the fitting portion 12 (forward direction in the embodiment) so as to hook onto and lock onto the horizontal bar Ho. In this case, the locking portion 13 is disposed on the upper surface side of the right support arm portion 14 and in the vicinity of the fitting portion 12, and is configured in a forward-facing hook shape (inverted L-shape when viewed from the side) with a vertical piece 20 protruding upward from the upper surface side of the right support arm portion 14 and a horizontal piece 21 protruding forward from an upper portion of the vertical piece 20.

[0023] In this case, the horizontal bar Ho is inserted into the area surrounded by the locking portion 13 (the vertical piece 20 and the horizontal piece 21) and the front side of the upper surface of the right support arm portion 14, and the horizontal piece 21 rests on the horizontal bar Ho, causing the locking portion 13 to catch on and be locked to the horizontal bar Ho.

[0024] It is also possible to turn the reinforcing bar spacer 10 upside down and attach it to the intersection Cr of the reinforcing bars R (see FIG. 9). In this case, the horizontal bar Ho is inserted into the area surrounded by the locking portion 13 (the vertical piece 20 and the horizontal piece 21) and the front side of the upper surface of the right support arm portion 14, but the front side of the right support arm portion 14, not the horizontal piece 21, rests on the horizontal bar Ho.

[0025] In the embodiment, a stopper piece 22 that overlaps with the vertical piece 20 of the locking portion 13 in a side view is provided on the rear side of the upper surface of the left support arm portion 14 and protrudes upward. The vertical piece 20 of the locking portion 13 and the stopper piece 22 are arranged on both the left and right sides of the fitting portion 12. When the reinforcing bar spacer 10 is attached to the intersection portion Cr of the reinforcing bar R, both the vertical piece 20 and the stopper piece 22 arranged on both the left and right sides of the fitting portion 12 can abut against the horizontal bar Ho. Therefore, the rotation of the reinforcing bar spacer 10 around the vertical bar Ve is restricted. It is also possible to replace the stopper piece 22 with the locking portion 13 and configure a pair of left and right locking portions 13, 13.

[0026] According to the embodiment of the reinforcing bar spacer 10, the opening direction of the fitting portion 12 and the protruding direction of the hook-shaped portion (horizontal piece 21) of the locking portion 13 face in the same direction (forward in this embodiment), so the operation of hooking the locking portion 13 onto the horizontal bar Ho and the operation of fitting the fitting portion 12 into the vertical bar Ve can be performed in a single action. This results in significantly improved installation workability and user friendliness.

[0027] In addition, since the fitting portion 12 is connected to the spacer body 11 (the connecting portion 15 in this embodiment) via the bridge portion 16, the fitting portion 12 can easily expand and deform when fitted into the vertical muscle Ve. In other words, when the fitting portion 12 is fitted into the vertical muscle Ve, the presence of the bridge portion 16 allows the fitting portion 12 to expand and deform almost independently of the spacer body 11.

[0028] Therefore, it is possible for the fitting portion 12 to be fitted into vertical bars Ve of multiple nominal diameters (it goes without saying that the locking portion 13 can be hooked onto horizontal bars Ho of multiple nominal diameters), making the reinforcing bar spacer 10 highly versatile.

[0029] Furthermore, when the fitting portion 12 is fitted into the vertical bar Ve and is expanded and deformed, the expansion deformation is unlikely to affect the spacer body 11 (in the embodiment, the pair of left and right support arm portions 14, 14 and the connecting portion 15) due to the presence of the bridge portion 16. Therefore, even in such a state, the spacer body 11 does not warp and the gap between the reinforcing bar R and the formwork F can be kept constant, and an appropriate covering thickness can be obtained.

[0030] The configuration of each part in the present invention is not limited to the illustrated embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, as shown in the first modified example of Fig. 11, there may be one bridge part 16 for the fitting part 12, or as shown in the second modified example of Fig. 12, there may be two or more bridge parts 16. It is preferable that the bridge part 16 is located as far away as possible from the opening groove 17 of the fitting part 12. In this way, the bridge part 16 does not get in the way, and the fitting part 12 can easily expand and deform. [Explanation of symbols]

[0031] Cr intersection site F-frame Ho Horizontal stripes R Reinforcement Ve Vertical Stripes 10 Reinforcing bar spacers 11 Spacer body 12 Fitting part 13 Locking part 14 Support arm part 15 Continuous section 16 Bridge section 17 Opening groove 18 Cutout 19 Stopper piece 20 Vertical piece 21 horizontal piece 22 Stopper piece

Claims

[Claim 1] A synthetic resin reinforcing bar spacer (10) is attached to an intersection (Cr) of a reinforcing bar (R) that is assembled in a vertical and horizontal grid pattern of a plurality of vertical bars (Ve) and horizontal bars (Ho), The spacer includes a spacer body (11) extending in the front-rear direction intersecting the horizontal reinforcement (Ho), a vertical gutter-shaped fitting portion (12) into which the vertical reinforcement (Ve) is detachably fitted by expanding and deforming, and a hook-shaped locking portion (13) having a tip facing in the forward opening direction of the fitting portion so as to hook and lock onto the horizontal reinforcement (Ho), The spacer body (11) has a pair of left and right support arm portions (14), (14) extending in the front-rear direction and a connecting portion (15) connecting these support arm portions (14), (14), and the locking portion (13) is provided on one or both of the pair of left and right support arm portions (14), (14), The fitting portion (12) is located within an area partitioned in a U-shape in plan view by the pair of left and right support arm portions (14), (14) and the connecting portion (15), and is connected to the connecting portion (15) via a bridge portion (16) that allows the fitting portion (12) to be expanded and deformed. Rebar spacers (10).

Images