JP2011026876A - Spacer for bar arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer for bar arrangement for arranging reinforcing bars at accurate positions, allowing crushed stones etc. in concrete to smoothly flow in, controlling the generation of air bubbles in the concrete, and achieving compactness during transportation and storage, while being light in weight. <P>SOLUTION: The spacer 11 for bar arrangement includes: a cylindrical body 2 having openings at upper and lower ends, respectively; and first and second reinforcing bar supports 2c, 2d formed in the upper end of the cylindrical body 2 in a manner of facing in the direction of crossing the opening 2a of the upper end. The cylindrical body 2 is configured so that the upper and lower spacers may be stacked in the state that the cylindrical body 2 of the spacer 11 relatively positioned on the upper side is externally fitted to the cylindrical body 2 of the other spacer 11 positioned on the lower side from the lower end opening when a plurality of spacers 11 are stacked. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a bar arrangement spacer used when forming, for example, a concrete floor portion of a building, and more specifically, it is possible to place concrete having a sufficient thickness around a reinforcing bar composed of a reinforcing bar or the like. It is related with the spacer for bar arrangement.

  Conventionally, when placing concrete reinforced with reinforcing bars on the floor or foundation of a building, it is required to arrange the concrete with a sufficient thickness around the reinforcing bars. That is, it is required to cast concrete so as to have a sufficient cover thickness around the reinforcing bars.

  Therefore, a method is widely used in which a plurality of spacers are arranged on the floor surface and concrete is poured and hardened in a state where reinforcing bars are bridged between the spacers.

  Patent Document 1 below discloses a reinforcing bar spacer for floor reinforcement used for such applications. FIG. 9 is a perspective view showing a bar arrangement spacer described in Patent Document 1. FIG. The bar arrangement spacer 101 is made of a concrete block or a synthetic resin. The bar arrangement spacer 101 is a substantially rectangular parallelepiped block, and has first and second grooves 101b and 101c opened toward the upper surface 101a, and third and fourth grooves 101d and 101e.

  The grooves 101b to 101e are provided to bridge and support the reinforcing bars. For example, a reinforcing bar can be arrange | positioned in the direction which connects the 1st, 2nd groove | channel 101b, 101c which opposes, and it can support with the bottom part of the groove | channel 101b, 101c. Therefore, the height of the supported reinforcing bar is sufficiently higher than the lower surface 101f. Therefore, when the concrete is poured and hardened, the concrete can be placed with a sufficient cover thickness below the reinforcing bars.

  On the other hand, in patent document 1, as shown to Fig.10 (a) and (b), the spacer 102 using the cylindrical steel pipe 102a is also disclosed. Here, first and second grooves 102a and 102b and third and fourth grooves 102c and 102d that are opened upward are formed at both ends of the opening edge of the cylindrical steel pipe 102a. That is, it is shown that the spacer may be formed using the steel pipe 102a instead of the block body.

  In recent years, synthetic resin spacers have been proposed in which support portions for supporting reinforcing bars are provided at a plurality of height positions. In this type of spacer, a hole for supporting a reinforcing bar is formed in a plate-like or block-like spacer main body, thereby forming a support portion.

Japanese Utility Model Publication No. 5-22723

  When constructing the floor of a building, etc., it was necessary to prepare many spacers for bar arrangement. For this reason, a large number of spacers as described in Patent Document 1 must be prepared, and the bulk becomes high, so that a large space is required for storage and transportation.

  In addition, when concrete is placed around a reinforcing bar, it is strongly required that bubbles that become defects hardly occur in the concrete. However, in the spacer 102 shown in FIGS. 10A and 10B, it is difficult for concrete to sufficiently flow into the steel pipe 102a, and it is particularly difficult for crushed stone to sufficiently flow. For this reason, there is a risk that bubbles may be generated in the concrete after curing due to insufficient composition strength due to non-uniform composition.

  Further, in the structure using the block body like the spacer 101 shown in FIG. 9, the spacer becomes heavy and the handling property at the time of transportation and construction is not sufficient.

  In addition, in the spacers 101 and 102 described in Patent Document 1, since the heights of the plurality of grooves 101b to 101e and 102b to 102e are constant, the reinforcing bars cannot be arranged at various height positions. That is, since the height of the reinforcing bar from the floor surface was constant, it was not possible to place the reinforcing bar around the reinforcing bar so as to have various cover thicknesses. Therefore, various types of spacers having different groove height positions have to be prepared depending on the application. In addition, a wide variety of spacers had to be prepared for each customer.

  Furthermore, as described above, there has been a proposal of a spacer capable of arranging reinforcing bars at a plurality of height positions. However, in such a spacer, the reinforcing bars may be accidentally bridged to holes or the like at different height positions. . For this reason, there was a need to redo the rebar placement work.

  The object of the present invention is to provide a reinforcing bar such as a reinforcing bar at an accurate position in view of the current state of the prior art described above, and to smoothly flow crushed stones in concrete into the concrete. An object of the present invention is to provide a bar arrangement spacer that can suppress the generation of air bubbles, is less likely to be bulky during transportation and storage, and is lightweight.

  Another object of the present invention is that it is difficult to cause an error in the position where the reinforcing bar is arranged, and the reinforcing bar can be arranged at a plurality of types of height positions, and the types of the reinforcing bar can be reduced. The object is to provide a bar arrangement spacer.

  According to the present invention, the cylindrical main body having openings at the upper end and the lower end, the opening at the upper end being smaller than the opening at the lower end, and the upper end provided on the upper end side of the cylindrical main body A reinforcing bar supporting portion that is opposed to each other in a direction crossing the opening of the reinforcing bar, and is positioned relatively upward when a plurality of reinforcing bar support members are stacked. The cylindrical main body of the reinforcing bar spacer is extrapolated to the cylindrical main body of the reinforcing bar spacer positioned relatively downward from the lower end opening side, and the upper and lower reinforcing bar spacers are stacked. Thus, a bar arrangement spacer is provided in which the cylindrical main body is formed.

  In a specific aspect of the bar arrangement spacer according to the present invention, when the upper and lower bar arrangement spacers are stacked on the cylindrical main body, means for making the upper bar arrangement spacer height position constant is provided. Is provided. In this case, when two bar arrangement spacers are stacked, the height position of the upper bar arrangement spacer is fixed, so that the upper bar arrangement spacer is positioned at the height position of the reinforcing bar support portion. The reinforcing bar can be supported with high accuracy.

  In another specific aspect of the spacer for bar arrangement according to the present invention, a plurality of pairs of reinforcing bar support portions including the first and second reinforcing bar support portions are provided, and at least one pair of reinforcing bar support portions is provided. The height positions of the pairs are different from the height positions of the remaining pairs of reinforcing bar support portions. In this case, the reinforcing bar can be arranged at a certain height position by at least one reinforcing bar support part pair, and the remaining pair of reinforcing bar support part pairs can be placed at a height position different from the above certain height position. Reinforcing bars can be placed. Therefore, reinforcing bars can be arranged at a plurality of height positions.

  In still another specific aspect of the reinforcing bar spacer according to the present invention, in the plurality of pairs of reinforcing bar support portions, the diameter of the reinforcing bars supported by at least one pair of reinforcing bar support portions is the remaining reinforcement. A plurality of reinforcing bar support part pairs are formed so as to be different from the diameter of the reinforcing bar supported by the muscle support part pair. In this case, reinforcing bars having different diameters can be arranged using one type of reinforcing bar spacer.

  In another specific aspect of the bar arrangement spacer according to the present invention, when the two bar arrangement spacers are stacked, the first and second reinforcing bars of the bar arrangement spacer located above are arranged. The height of the support portion is different from the height of the first and second reinforcing bar support portions in one reinforcing bar spacer. In this case, it is possible to arrange reinforcing bars at different height positions by stacking a plurality of reinforcing bar spacers.

  In still another specific aspect of the spacer for bar arrangement according to the present invention, an opening that communicates the inside and the outside of the cylindrical main body is provided on a side surface of the cylindrical main body. In this case, the concrete flows more rapidly and smoothly into the cylindrical main body of the bar arrangement spacer through the opening. Therefore, the crushed stone can sufficiently flow into the spacer, and the spacer can be filled with concrete having a more uniform composition.

  According to still another specific aspect of the bar arrangement spacer according to the present invention, the first and second grooves opened upward at the opening edge of the upper end of the cylindrical main body are formed. First and second reinforcing bar support portions are provided. In this case, the first and second reinforcing bar support portions can be easily formed simply by forming a groove in the upper end opening of the cylindrical main body.

  In still another specific aspect of the bar arrangement spacer according to the present invention, the first and second reinforcing bar support portions are provided so as to protrude upward from the opening edge of the upper end of the cylindrical body. And it consists of the protrusion part which has the recessed part which is opened upwards and the said reinforcing bar is inserted from upper direction. In this case, the reinforcing bar can be arranged at a position higher than the upper end of the cylindrical main body of the reinforcing bar spacer. Further, by appropriately determining the position of the protruding portion at the design stage, the reinforcing bars can be arranged at various height positions, not limited to the height position of the cylindrical main body.

  The cylindrical main body in the spacer for bar arrangement according to the present invention is not particularly limited as long as it has a shape in which the lower end opening is larger than the upper end opening, but in another specific aspect of the present invention, It has the shape of a truncated pyramid. In the case of the shape of a truncated cone or a truncated pyramid, molding is prepared, and a plurality of bar arrangement spacers can be easily overlapped and stacked.

  Moreover, in another specific aspect of the spacer for bar arrangement according to the present invention, the cylindrical main body is located on the upper end side and has a relatively small opening at the upper end. And a second cylindrical part located on the lower end side and having the relatively large opening at the lower end. In this case, the laminated state can be further stabilized.

  In still another specific aspect of the bar arrangement spacer according to the present invention, when the two bar arrangement spacers are stacked, the second cylindrical portion is the first cylinder of the lower arrangement space. Extrapolated to the shape. In this case, the stacking operation can be easily performed.

The bar arrangement spacers according to the present invention are formed of various materials, but are preferably made of a synthetic resin integral molded product. In this case, weight reduction and cost reduction can be achieved.

  According to the bar arrangement spacer according to the present invention, since it has a structure including the cylindrical main body and the first and second reinforcing bar supporting portions, the concrete smoothly flows into the inside from the opening side of the upper end of the cylindrical main body. Since it flows in, the composition of the concrete in a cylindrical main body can be equalize | homogenized, and defects, such as a bubble, do not arise easily. In addition, when a plurality of bar arrangement spacers are stacked, the upper and lower bar arrangements are arranged so that the cylindrical main body of the upper bar arrangement spacer is extrapolated from the lower end opening side to the cylindrical main body of the lower arrangement bar spacer. Since the spacers for use are stacked, the handleability during storage, transportation, and on-site work can be improved. In particular, since it is common to prepare several hundred or more bar arrangement spacers for the construction of the floor of a building, it is possible to effectively improve the handling during storage, transportation and work. .

  In addition, since it has a cylindrical main body having an internal space, it is possible to reduce the weight and to provide sufficient strength while being light.

It is a partial notch perspective view which shows the state which spanned the reinforcing bar as a reinforcing bar to the spacer for bar arrangement concerning the 1st Embodiment of this invention. It is a perspective view of the spacer for bar arrangement of the 1st Embodiment of this invention. (A)-(c) is the top view, front view, and front sectional drawing of the spacer for bar arrangement of the 1st Embodiment of this invention. It is a perspective view which shows the state which laminated | stacked the two spacers for bar arrangement concerning the 1st Embodiment of this invention. It is a perspective view of the spacer for bar arrangement which concerns on the 2nd Embodiment of this invention. (A)-(c) is the top view, front view, and front sectional drawing of the spacer for bar arrangement which concern on the 2nd Embodiment of this invention. It is front sectional drawing which shows the state which laminated | stacked two spacers for bar arrangement concerning the 2nd Embodiment of this invention. It is a perspective view which shows the state which laminated | stacked the two spacers for bar arrangement concerning the 2nd Embodiment of this invention. It is a perspective view of the conventional spacer. (A) And (b) is the top view and front view for demonstrating the other example of the conventional spacer.

  Hereinafter, the present invention will be clarified by describing specific embodiments of the present invention with reference to the drawings.

[First Embodiment]
FIG. 2 is a perspective view of the bar arrangement spacer according to the first embodiment of the present invention, and FIGS. 3A to 3C are a plan view, a front view, and a front sectional view of the bar arrangement spacer. It is.

  The bar arrangement spacer 1 has a cylindrical main body 2. The external shape of the cylindrical main body 2 is a truncated cone shape. Note that a truncated pyramid shape may be used instead of the truncated cone shape.

  Since the cylindrical main body 2 has a hollow truncated cone shape, it has an opening 2a at the upper end and an opening 2b at the lower end. A plurality of grooves 2c to 2f are formed at the opening edge of the opening 2a. Of the plurality of grooves 2c to 2f, the grooves 2c and 2d face each other in the direction crossing the opening 2a, and the grooves 2e and 2f face each other in the same direction across the opening.

  As shown in FIG. 1, each of the grooves 2c to 2f constitutes a reinforcing bar supporting portion that supports the reinforcing bars 3 and 4 as reinforcing bars. Further, instead of the grooves 2c to 2f, protrusions such as the protruding portions 12g to 12j in FIG.

  More specifically, the facing grooves 2c and 2d constitute the first and second reinforcing bar support portions in the present invention, and the first reinforcing bar support portion pair is constituted by the grooves 2c and 2d. ing. Similarly, the grooves 2e and 2f correspond to first and second reinforcing bar support portions, and a second reinforcing bar support portion pair is formed by the grooves 2e and 2f.

  The difference in height between the bottoms of the grooves 2e and 2f and the bottoms of the grooves 2c and 2d is made larger than the diameter of the reinforcing bar 3 supported by the grooves 2c and 2d.

  In the present embodiment, the depths of the grooves 2c and 2d are deeper than the depths of the grooves 2e and 2f. Therefore, as shown in FIG. 1, the height position of the reinforcing bar 3 supported by the first reinforcing bar supporting portion pair including the grooves 2c and 2d is higher than the height position of the reinforcing bar 4 supported by the grooves 2e and 2f. Is also low. That is, it is possible to support the reinforcing bars 3 and 4 at different height positions.

  When a plurality of first and second reinforcing bar support portion pairs are provided, the reinforcing bar diameter supported by at least one reinforcing bar support portion pair is supported by the remaining reinforcing bar support portion pairs. The diameter may be different. For example, in the present embodiment, the grooves 2c, 2d and the grooves 2e, 2f are formed so that the diameters of the reinforcing bars supported by the grooves 2c, 2d are different from the diameters of the reinforcing bars supported by the grooves 2e, 2f. May be. Accordingly, reinforcing bars having different diameters can be supported using the reinforcing bar spacer 1.

  A plurality of openings 2 g to 2 j are formed on the side surface of the cylindrical main body 2. The openings 2g to 2j communicate the inside of the cylindrical main body 2 with the outside. Therefore, when concrete is poured, the concrete flows smoothly into the cylindrical main body 2 not only from the opening 2a but also from the openings 2g to 2j. Therefore, the composition of the filled concrete in the cylindrical main body 2 can be made uniform. Since the composition of the concrete can be made uniform in the cylindrical main body 2, appropriate concrete strength can be expressed and the generation of bubbles after curing can be suppressed. But even if it is a case where the opening parts 2g-2j are not formed, since the cylindrical main-body part 2 has the opening 2a in the upper end and the opening 2b in a lower end, concrete is fully smoothly in the cylindrical main body 2. It is possible to make it flow.

  A plurality of ribs 2k extending in the vertical direction are formed on the inner surface of the cylindrical main body 2. The rib 2k constitutes a means for fixing the height position of the laminated structure when the plurality of reinforcing bar spacers 1 and 1 are laminated. The plurality of ribs 2k are formed so as to protrude inward from the inner peripheral surface of the cylindrical main body 2. The lower end of the rib 2k is located at an intermediate height position of the cylindrical main body 2. At the lower end of the rib 2k, when two reinforcing spacers 1 are stacked as shown in FIG. 4, the upper end of the cylindrical main body 2 of the lower reinforcing spacer 2 is in a position where it abuts. That is, the upper and lower bar arrangement spacers 1 and 1 are laminated such that the upper end of the cylindrical main body 2 of the lower bar arrangement spacer 1 abuts the lower end of the rib 2k. Therefore, in the stacked structure shown in FIG. 4, the height position of the stacked structure can be made constant. In addition, the usage method which laminates and uses the spacer 1 for reinforcement is mentioned in full detail later.

  The plurality of ribs 2k are not particularly limited, but are provided on both sides of the grooves 2c to 2f in the present embodiment. Thereby, it is possible to increase the strength in the vicinity of the portion where the grooves 2c to 2f are provided. In addition, a pair of ribs 2 k located on both sides of one groove are arranged uniformly in the circumferential direction of the cylindrical main body 2. Therefore, as will be described later, it is possible to further improve the stability of the posture when the two spacers 1 for bar arrangement are stacked.

  On the other hand, on the outer surface of the cylindrical main body 2, a protrusion 2m extending in the vertical direction is formed on the lower end side. The protrusion 2m comes into contact with the inner peripheral surface of the cylindrical main body 2 of the bar arrangement spacer 1 located above when a plurality of bar arrangement spacers 1 are laminated, so as to prevent rattling in the laminated state. Act on.

  Below the grooves 2c and 2d, the notation "H60" is shown on the side surface of the cylindrical main body 2. This indicates that the height position of the bottom of the grooves 2c and 2d is 60 mm, and represents the height position where the reinforcing bars are supported. Similarly, the notation “H70” is also shown below the groove 2e. This indicates that the bottoms of the grooves 2e and 2f are 70 mm, and are supported by the grooves 2e and 2f. Represents the height position of the reinforcing bar.

  Note that “(H90)” is displayed below “H60” below the groove 2d, and “(H100)” is also displayed below the groove 2e. These notations in parentheses indicate that when two reinforcing spacers 1 are stacked, the height positions of the grooves 2c and 2d of the reinforcing spacers located above and the heights of the bottoms of the grooves 2e and 2f. Each position is represented. By expressing such a notation on the outer surface of the cylindrical main body 2, it is possible to eliminate an error in height when the reinforcing bars are arranged.

  Conventionally, a spacer capable of arranging reinforcing bars at a plurality of types of height positions has also been proposed. However, in this type of conventional spacer, the reinforcing bars may be accidentally bridged at different height positions between different spacers. . In such cases, the work had to be redone.

  On the other hand, in the spacer 1 of this embodiment, since the height position of the bottom part of the groove | channels 2c-2f is described, possibility that the height position at the time of arrangement | positioning of a rebar will be mistaken can be made remarkably small.

  The spacer 1 for bar arrangement of this embodiment consists of a synthetic resin integral molding. Therefore, it is much lighter and can be provided at low cost. However, the spacers 1 may be formed of a material other than the synthetic resin.

  Next, the usage method of the spacer 1 for bar arrangement of this embodiment is demonstrated.

  During storage and transportation, a plurality of bar arrangement spacers 1 can be stacked. For example, as shown in FIG. 4, the upper bar arrangement spacer 1 can be extrapolated from the lower end opening 2b side to the lower bar arrangement spacer 1 and stacked. Three or more bar arrangement spacers 1 can be laminated in the same manner. Therefore, since it is not bulky at the time of storage, transportation, and storage work and transportation work can be easily performed. In many cases, several hundred bar arrangement spacers 1 are used at the site. In such a case, the stacked bar arrangement spacers 1 can be appropriately arranged at the site to facilitate the work. .

  When the reinforcing bar is supported by using one reinforcing bar spacer 1, as shown in FIG. 1, the reinforcing bar 3 is bridged between the grooves 2e and 2f so as to be bridged between the grooves 2c and 2d. Reinforcing bars 4 can be arranged. In this case, the reinforcing bars 3 and 4 can be supported at different height positions by using one reinforcing bar spacer 1. However, it is not always necessary to use all of the grooves 2c to 2f. Only the reinforcing bar 3 may be supported using only the first reinforcing bar support part pair including the grooves 2c and 2d, or only the second reinforcing bar support part pair including the grooves 2e and 2f may be used. Only the reinforcing bar 4 may be supported. In this case, since the rib 2k described above is located on both sides of the reinforcing bars 3 and 4, the reinforcing bars 3 and 4 can be supported with sufficient strength even when the thickness of the cylindrical main body 2 is reduced. it can.

  When the reinforcing bars 3 and 4 are arranged, as described above, the notation “H60” is displayed below the grooves 2c and 2d, and the notation “(H70)” is displayed below the grooves 2e and 2f. Therefore, in the plurality of bar arrangement spacers 1, there is no mistake in a groove that spans the reinforcing bars 3 or 4. That is, when the reinforcing bars 3 are arranged between the plurality of reinforcing spacers 1, the reinforcing bars 3 can be reliably arranged in the grooves 2c and 2d with the notation "H60" in the reinforcing spacer 1 as a clue.

  Further, the bar arrangement spacer 1 of the present embodiment can be used by stacking a plurality of bar arrangement spacers 1. Thereby, the reinforcing bars can be arranged at different height positions. For example, as shown in FIG. 4, two reinforcing bar spacers 1 are stacked. In this case, the height positions of the grooves 2c to 2f are higher than when one reinforcing bar spacer 1 is used. This height position is expressed in parenthesis notation as described above. Therefore, when a reinforcing bar is bridged and supported in the grooves 2c and 2d, the reinforcing bar can be supported at a height of 90 mm. Similarly, the grooves 2e and 2f can be supported at a height of 100 mm where the height of the bottom is shown in parentheses.

  Therefore, by arranging the two bar arrangement spacers 1 in a stacked manner, it becomes possible to support the reinforcing bar at a height position different from the case where only one bar arrangement spacer 1 is used. Reinforcing bars can be supported at various height positions. In other words, the cover thickness of the concrete around the reinforcing bars can be varied.

  Further, when the two bar arrangement spacers 1 are stacked, the stability of the posture becomes a problem, but as described above, the upper end of the bar arrangement spacer 1 inserted from below into the lower end of the rib 2k. Since a plurality of ribs 2k are provided, the reinforcing bars can be stably supported even when two reinforcing spacers 1 are stacked as shown in FIG.

[Second Embodiment]
FIG. 5 is a perspective view showing a bar arrangement spacer 11 according to the second embodiment, and FIGS. 6A to 6C are a plan view, a front view, and a front sectional view thereof.

  As shown in FIG. 5, the spacer 11 of the present embodiment includes a cylindrical main body 12 having a first cylindrical portion 12a having a relatively small diameter and a second cylindrical portion 12b having a relatively large diameter. Prepare. The cylindrical main body 12 has an opening 12c at the upper end and an opening 12d at the lower end. The first cylindrical portion 12a is positioned on the upper end opening 12c side, and the second cylindrical portion 12b is positioned on the lower end opening 12d side.

  The lower end surface 12e of the cylindrical part 12a is located inside the second cylindrical part 12b. Therefore, as will be described later, when the two bar arrangement spacers 11 are stacked, the upper end surface 12f of the first cylindrical portion 12a of the lower bar arrangement spacer 1 is aligned with the upper bar arrangement spacer 11. Abutting on the lower end surface 12e of the first cylindrical portion 12a, the height of the laminated structure is made constant. That is, the lower end surface 12e and the upper end surface 12f constitute a means for making the height position constant when the two reinforcing bar spacers 11 are stacked. The means for fixing the height position when the two reinforcing bar spacers 11 are laminated is not only the lower end surface 12g and the upper end surface 12f, but also the upper end surface of the second cylindrical portion 12b as will be described later. 12s and the lower end surface 12t also constitute means for making the height position constant.

  A plurality of projecting portions 12g to 12j are formed so as to project upward from the opening edge of the opening 12c at the upper end of the cylindrical main body 12. A groove that opens upward is formed in each of the protrusions 12g to 12j. The reinforcing bar 3 or the reinforcing bar 4 of FIG. 1 shown in the first embodiment is inserted into the groove from above and supported.

  Here, each protrusion part 12g-12jh has the shape which made the inner surface of the U-shaped groove approach on the upper end side. Taking the protruding portion 12g as an example, the groove 12k is formed in the protruding portion 12g, but the protruding pieces 12m and 12n on both sides of the groove 12k are close to each other on the upper end side. That is, the maximum diameter portion of the groove 12k is substantially equal to or slightly larger than the diameter of the reinforcing bar, but the opposing distance of the protruding pieces 12m and 12n at the upper end is larger than the diameter of the reinforcing bar. It is slightly smaller. For this reason, the reinforcing bars inserted into the grooves 12k are hardly pulled upward. The protruding sides 12m and 12n have elasticity so as to be expanded when a reinforcing bar is press-fitted from above.

  However, a U-shaped groove as in the first embodiment may be used instead of the groove 12k.

  In the present embodiment, the projecting portions 12g and 12h are opposed to each other in a direction crossing the upper end opening 12c, and the projecting portions 12g and 12h constitute the first and second reinforcing bar support portions in the present invention. Similarly, the protrusions 12i and 12j are opposed to each other in the direction crossing the opening 12c, and constitute first and second reinforcing bar support portions. Therefore, also in this embodiment, the reinforcing bar support part pair which consists of protrusion parts 12g and 12h and the other reinforcing bar support part pair which consists of protrusion parts 12i and 12j are comprised.

  Further, the notation “H60” indicating that the height of the bottoms of the grooves of the protruding portions 12g and 12h is 60 mm is shown on the outer surfaces of the protruding portions 12g and 12h. Similarly, the notation “H70” indicating that the height of the bottom of the groove provided in the protrusions 12i, 12j is 70 mm is shown on the outer surfaces of the protrusions 12i, 12j.

  Further, the bar arrangement spacers 11 of the present embodiment can be used in a state where two are stacked. In this case, the protruding portions 12g to 12j of the upper bar arrangement spacer 11 are used to support the reinforcing bars. The height position in this case is shown in brackets. That is, the notation of “(H90)” is represented on the outer surfaces of the projecting portions 12g and 12h, and the notation of “(H100)” is represented on the outer surfaces of the projecting portions 12i and 12j.

  A plurality of ribs 12o are formed on the outer surface of the first cylindrical portion 12a. The rib 12o extends in the height direction. Moreover, the rib 12p is formed in the outer peripheral surface of the 2nd cylindrical part 12b under the rib 12o. The rib 12p is thicker than the rib 12o and extends in the vertical direction. A recess 12q shown in FIG. 6C is formed on the inner peripheral surface of the 12p. The recess 12q extends in the vertical direction. The outer peripheral surface of the recess 12q is the same as the outer peripheral surface of the rib 12o. Accordingly, when the plurality of bar arrangement spacers 11 are laminated, the ribs 12o fit into the recesses 12q, thereby stabilizing the bar arrangement spacers 11 in the laminated structure. That is, since the ribs 12o and the recesses 12q extend in the vertical direction, if they are fitted together, the circumferential displacement of one reinforcing bar spacer 11 with respect to the other reinforcing bar spacer 11 is prevented in the laminated structure. can do. Therefore, the posture of the laminated structure can be stabilized.

  Further, a rib 12r thicker than the rib 12o is formed on the outer surface of the cylindrical portion 12a. The rib 12r is provided for reinforcement. The rib 12r may not be provided.

  The upper end surface 12s of the second cylindrical portion 12b cooperates with the lower end surface 12t of the second cylindrical portion 12b of the bar arrangement spacer arranged above to make the height position of the laminated structure constant. Is configured.

  A plurality of openings 12u are formed in the first cylindrical portion 12a and the second cylindrical portion 12b, respectively. Since the opening 12u is provided, the concrete flows smoothly into the reinforcing bar spacer 11. Therefore, since not only the openings 12c and 12d but also the plurality of openings 12u are provided, the composition of the concrete in the spacer 11 can be made uniform. In particular, since crushed stone or the like easily flows, generation of bubbles in the concrete after hardening can be suppressed. But the opening part 12u does not necessarily need to be provided.

  The reinforcing bar spacer 11 of this embodiment is also made of a synthetic resin integrated molded product. Therefore, the weight of the reinforcing bar spacer 11 can be further reduced and the cost can be reduced. However, the spacers 11 may be formed of a material other than the synthetic resin.

  Next, a method of using the reinforcing bar spacer 11 will be described.

  Since the bar arrangement spacer 11 of this embodiment can be laminated | stacked, the volume at the time of storage and conveyance can be made small. Therefore, storage and transportation can be easily performed. Further, even when a large number of bar arrangement spacers 11 are scattered in a wide field, the volume can be reduced, and the space can be reduced.

  In use, the bar arrangement spacer 11 is arranged on the floor surface. In this state, a reinforcing bar is bridged between the protruding portions 12g and 12h. Specifically, a reinforcing bar is press-fitted into the groove 12k so as to widen the gap between the protruding pieces 12m and 12n, and the reinforcing bar is inserted into the groove 12k. In this way, the reinforcing bars can be inserted and supported in the grooves 12g and 12h having a bottom height of 60 mm. Moreover, another reinforcing bar can be inserted and supported also in the protrusion parts 12i and 12j which oppose. Therefore, similarly to the first embodiment, in this embodiment, the reinforcing bars can be supported at a height position of 60 mm and a height position of 70 mm, that is, a plurality of types of reinforcing bars are supported at different height positions. can do.

  Also in this embodiment, two reinforcing spacers 11 can be stacked and used as shown in FIGS. In this case, the above-described ribs 12o are laminated so as to fit into the recesses 12q of the upper spacer spacer 11. Therefore, it is difficult for the circumferential displacement between the two reinforcing spacers 11 and 11 to occur. In addition, a means for making the height in the stacked state constant in the two spacers 11 and 11 for bar arrangement is provided. Therefore, the posture of the stacked state is stabilized, and the height position of the upper bar arrangement spacer 11 in the stacked structure is determined with high accuracy.

  Therefore, in the state shown in FIG. 7 and FIG. 8, when a reinforcing bar is bridged and supported between the projecting portions 12 g and 12 h, as indicated by “(H90)” in parentheses in FIG. The rebar can be supported at a height of 90 mm. 7 and 8, the reinforcing bars can be supported at a height of 100 mm as shown by “(H100)” by supporting the reinforcing bars using the protrusions 12i and 12j. .

  Therefore, the reinforcing bars can be supported at many height positions by using two reinforcing bar spacers 12. Therefore, by using the two bar arrangement spacers 12, the reinforcing bars can be supported at more height positions, and the concrete can be placed so as to have various cover thicknesses.

  Also in the present embodiment, since the notation representing the height is shown on the outer surfaces of the protruding portions 12g to 12j constituting the reinforcing bar supporting portion pair, the reinforcing bars are erroneously inserted into the protruding portions at different height positions. There is no risk of insertion into the groove. That is, when a large number of reinforcing bar spacers 11 are arranged and the reinforcing bars are bridged, or when a plurality of structures in which two reinforcing bar spacers 11 and 11 are stacked are arranged and the reinforcing bars are bridged, the reinforcing bars are correct. It can be inserted and supported in the groove of the protrusion at the height position. When a conventional spacer having a plurality of types of reinforcing bar support portions is used, there is a possibility that the reinforcing bars may be accidentally bridged over the support portions at different height positions. An error can be prevented.

  Therefore, also in the second embodiment, concrete can be reliably placed around the reinforcing bar so as to have various required cover thicknesses.

  In the second embodiment, the first and second cylindrical portions 12a and 12b are cylindrical, but may be rectangular.

DESCRIPTION OF SYMBOLS 1 ... Spacer for arrangement | positioning 2 ... Cylindrical main body 2a, 2b ... Opening 2c-2f ... Groove 2g-2j ... Opening part 2k ... Rib 2m ... Protruding 3, 4 ... Reinforcing bar 11 ... Spacer for arranging 12 ... Cylindrical main body 12a, 12b ... 1st, 2nd cylindrical part 12c, 12d ... Opening 12e ... Lower end surface 12f ... Upper end surface 12g-12j ... Projection part 12k ... Groove 12m, 12n ... Projection edge 12o, 12p ... Rib 12q ... Recess 12s ... Upper end surface 12t ... Lower end surface 12u ... Opening

Claims (12)

A cylindrical main body having openings at the upper and lower ends, the opening at the upper end being made smaller than the opening at the lower end;
A bar arrangement spacer provided on the upper end side of the cylindrical main body and comprising first and second reinforcing bar support portions facing each other in a direction crossing the opening of the upper end,
When a plurality of bar arrangement spacers are stacked, the tubular main body of the bar arrangement spacers positioned relatively upward is positioned relatively lower than the lower end opening side. A reinforcing bar spacer, wherein the cylindrical main body is formed such that the upper and lower reinforcing bar spacers are stacked by being extrapolated to the cylindrical main body.   The bar arrangement spacer according to claim 1, wherein when the upper and lower bar arrangement spacers are stacked on the cylindrical main body, a means for making the height position of the upper arrangement bar spacer constant is provided. .   A plurality of pairs of reinforcing bar support portions including the first and second reinforcing bar support portions are provided, and the height positions of at least one pair of reinforcing bar support portions are the remaining pairs of reinforcing bar support portions. The spacer for bar arrangement according to claim 1 or 2 different from the height position of.   In the plurality of pairs of reinforcing bar supports, a plurality of reinforcing bars supported by at least one pair of reinforcing bars support are different in diameter from the reinforcing bars supported by the remaining pairs of reinforcing bars. The reinforcing bar support spacer according to claim 2, wherein the reinforcing bar support portion pair is formed.   When the two bar arrangement spacers are stacked, the height of the first and second reinforcing bar supporting portions of the bar arrangement spacer located above is the height of the bar arrangement spacer in one bar arrangement spacer. The spacer for bar arrangement according to any one of claims 1 to 4, which is different from a height of the first and second reinforcing bar support portions.   The spacer for bar arrangement of any one of Claims 1-5 by which the opening part which connects the inside of a cylindrical main body and the exterior is provided in the side surface of the said cylindrical main body.   The said 1st, 2nd reinforcement reinforcement support part is provided by forming the 1st, 2nd groove | channel opened upwards in the opening edge of the upper end of the said cylindrical main body, The 1st, 2nd reinforcement bar | burr part is provided. The spacer for bar arrangement of any one of Claims 6.   The first and second reinforcing bar support portions are provided so as to protrude upward from the opening edge of the upper end of the cylindrical main body, and are recessed upwards so that the reinforcing bars are inserted from above. The spacer for bar arrangement of any one of Claims 1-6 which consists of a protrusion part which has.   The spacer for bar arrangement according to any one of claims 1 to 8, wherein the cylindrical main body has a truncated cone shape or a truncated pyramid shape.   The cylindrical main body is positioned on the upper end side and has a first cylindrical portion having the relatively small opening on the upper end, and is positioned on the lower end side and relatively large on the lower end. The spacer for bar arrangement of any one of Claims 1-8 provided with the 2nd cylindrical part which has the said opening.   The bar arrangement spacer according to claim 10, wherein when the two bar arrangement spacers are stacked, the second cylindrical portion is extrapolated to the first cylindrical portion of the lower arrangement spacer. .   The spacer for bar arrangement of any one of Claims 1-11 which consists of a synthetic resin integral molded article.

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