JP7002244B2 - Position retainers and concrete structures - Google Patents

Description

The present invention relates to a position holder and a concrete structure, and in particular, a position holder for holding the positions of the first rebar and the second rebar stacked inside the concrete structure, and the position holding. Regarding concrete structures constructed using tools.

It is already known that in a concrete structure such as a floor, a net-like reinforcing bar is embedded inside the concrete structure for the purpose of suppressing the occurrence of cracks (see, for example, Patent Document 1). Usually, a plurality of rebars are buried in a concrete structure. The plurality of rebars are arranged so as to partially overlap each other in the thickness direction of the concrete structure.

Here, in the rebars stacked in the concrete structure, when one of the two adjacent rebars is used as the first rebar and the other is used as the second rebar, these two rebars are used. Is arranged so that each stacking allowance (length of the stacked portion) has a predetermined length. On top of that, it is necessary to maintain the position of the second rebar with respect to the first rebar (in other words, the position of the first rebar with respect to the second rebar).

Special Fair 7-91878 Gazette

As a method of stacking the first rebar and the second rebar so as to have a predetermined stacking allowance and holding each rebar at the position, for example, binding the rebars with a binding wire or the like can be mentioned. .. However, when such a method is used, the accuracy of the arrangement position of the rebar may change depending on the skill of the operator. In order to ensure the construction quality when constructing a concrete structure using rebars, the positions of the stacked first rebars and second rebars can be properly and easily positioned regardless of the skill of the operator. Need to hold.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to appropriately and easily hold the positions of the stacked rebars regardless of the skill of the operator. It is to provide a position retainer.
Another object of the present invention is to provide a concrete structure that can be constructed while holding the positions of the stacked rebars appropriately and easily.

According to the position holder of the present invention, the subject is a position holder for holding the positions of the first rebar and the second rebar stacked in the thickness direction of the concrete structure inside the concrete structure. The first engaging portion that engages with the reinforcing bar constituting the first rebar, the second engaging portion that engages with the reinforcing bar constituting the second rebar, and the first engaging portion. And a connecting portion connecting between the second engaging portions, the connecting portion includes a first extending portion extending from the first engaging portion and the first extending portion. A second extension portion that is adjacent to the first extension portion and extends in a direction intersecting the first extension portion, and the second engagement portion and the second extension portion are connected to the first extension portion. It is solved by having a third extension portion extending along the line and being able to deform the third extension portion so as to swing around the second extension portion as a fulcrum. ..

The position holder of the present invention configured as described above includes a first engaging portion that engages with the reinforcing bars constituting the first rebar among the stacked first rebars and second rebars, and a first. (Ii) It has a second engaging portion that engages with the reinforcing bar constituting the net-like reinforcing bar, and a connecting portion that connects between the first engaging portion and the second engaging portion. This makes it possible to hold each of the first rebar and the second rebar at an arrangement position that provides a predetermined stacking allowance. That is, by using the position holder of the present invention, it is possible to appropriately and easily hold the positions of the stacked rebars regardless of the skill of the operator.
Further, in the above configuration, the connecting portion connects the first extending portion, the second extending portion intersecting with the first extending portion, and the second engaging portion and the second extending portion. Has a protrusion. Then, the connecting portion can be deformed so that the third extending portion swings with the second extending portion as a fulcrum. Further, in the state where the first engaging portion is engaged with the reinforcing bar, the second extending portion is along the reinforcing bar with which the first engaging portion is engaged. With such a configuration, the second engaging portion can be relatively easily engaged with the reinforcing bar by deforming the connecting portion as described above when the second engaging portion is engaged with the reinforcing bar. ..

Further, in the position holder, each of the first engaging portion and the second engaging portion engages with the reinforcing bar, so that the reinforcing bar with which the first engaging portion engages and the second engaging portion are engaged. When the distance from the reinforcing bar with which the portion engages is maintained at a length corresponding to the distance from the connection portion with the first engaging portion to the joint portion with the second engaging portion in the connecting portion, Suitable.
Further, in the position holder, the first engaging portion, the second engaging portion, and the connecting portion are formed of one linear member and are integrated, and the first engaging portion is integrated. The central portion of the linear member is curved so as to be along the outer edge of the reinforcing bar constituting the first rebar, and the second engaging portion has an end portion of the linear member. , It is preferable that the first rebar is curved along the outer edge of the reinforcing bar constituting the first rebar.
According to the above configuration, the position holder having the first engaging portion, the second engaging portion and the connecting portion is realized by a relatively simple configuration. Specifically, the position holder can be molded by bending each part of one linear member.

Further, in the position holder, the second engaging portion is formed at both ends of the linear member, and the first engaging portion is engaged with the reinforcing bar on both sides of the second engaging portion. It is more preferable that the second engaging portion is engaged with the reinforcing bar.
In the above configuration, the second engaging portion is engaged with the reinforcing bar on both sides of the portion where the first engaging portion is engaged with the reinforcing bar. That is, since the position holder is fastened to the rebar at three points, it is possible to further stabilize the attachment state of the position holder to each rebar.

Further, in the position holder, each of the first engaging portion and the second engaging portion engages with a reinforcing bar extending in the first direction, and the first engaging portion and the second engaging portion are engaged. In a state where each of the joints is engaged with the reinforcing bar, the first engaging portion, the second engaging portion and the connecting portion are lined up along the second direction orthogonal to the first direction, and the second direction. It is more preferable that the distance is maintained at a length corresponding to the distance.
In the above configuration, each of the first engaging portion and the second engaging portion engages with the reinforcing bar, so that the reinforcing bars are overlapped in a direction orthogonal to the extending direction (first direction) (second direction). It is possible to adjust the allowance to a predetermined length.

Further, in the position holder, each of the first engaging portion and the second engaging portion engages with the reinforcing bar in the region where the first rebar and the second rebar are overlapped. If so, it is even more suitable.
In the above configuration, each of the first engaging portion and the second engaging portion is engaged with the reinforcing bar in the region where the first rebar and the second rebar are overlapped. With such a configuration, it becomes easier to hold the rebars stacked so as to have a predetermined stacking allowance at the arrangement position.

Further, in the above configuration, when the thickness direction is along the vertical direction, the first engaging portion is attached to the reinforcing bar constituting the first rebar located above the second rebar. The second engaging portion is increasingly engaged with the reinforcing bars constituting the second rebar located below the first rebar from below the rebar. Suitable.
In the above configuration, the first engaging portion engages with the reinforcing bar in the first rebar located higher above from above, and the second engaging portion lowers with the reinforcing bar in the second rebar located lower. Engage from. If the direction in which the first engaging portion engages with the reinforcing bar and the direction in which the second engaging portion engages with the reinforcing bar are oriented so as to face each other in this way, the respective engaging portions are engaged. It becomes difficult to release the engagement state between the portion and the reinforcing bar. As a result, it becomes possible to further stabilize the attachment state of the position holder to each rebar.

Further, in the above configuration, the first engaging portion, the second engaging portion, and the connecting portion are the colors of the reinforcing bars constituting the first rebar and the reinforcing bars constituting the second rebar. It is more preferable that the color is different from the color.
In the above configuration, the color of the position holder is different from the color of the first rebar and the color of the second rebar. This makes it easier to see the position holder. Further, if the position holder is easily visible, it becomes easier to confirm the situation in which the position holder is attached to the stacked first rebar and the second rebar. Here, when the position holder is attached to each rebar, each rebar is held at the arrangement position where a predetermined stacking allowance is secured. Therefore, by confirming the situation in which the position holder is attached to the stacked first rebar and the second rebar, each rebar is held at the arrangement position where a predetermined stacking allowance is secured. It becomes possible to easily confirm that.

Further, the above-mentioned problem is, according to the concrete structure of the present invention, a first rebar and a second rebar stacked in the concrete structure in the thickness direction of the concrete structure. A position holder for holding the position of the rebar is provided, and the position holder includes a first engaging portion that engages with the rebar constituting the first rebar and a rebar constituting the second rebar. It has a second engaging portion that engages with, and a connecting portion that connects between the first engaging portion and the second engaging portion, and the connecting portion extends from the first engaging portion. The first extending portion to be extended, the second extending portion adjacent to the first extending portion and extending in a direction intersecting with the first extending portion, the second engaging portion and the first extending portion. It has a third extension section that is connected to the second extension section and extends along the first extension section, and the third extension section uses the second extension section as a fulcrum. It is solved by being able to deform so as to swing .
In the case of a concrete structure configured as described above, by using the above-mentioned position holder, the concrete structure can be appropriately and easily held at the positions of the stacked first rebar and second rebar. It becomes possible to build things.

Further, in the above concrete structure, the floor of the building may be formed, and the first rebar and the second rebar may be stacked in the vertical direction.
With the above configuration, by using the above-mentioned position holder, the floor of the building can be held in a state where the first rebar and the second rebar stacked vertically are appropriately and easily held at the respective arrangement positions. It is possible to construct an eggplant concrete structure.

According to the present invention, in constructing a concrete structure in which a plurality of stacked rebars are embedded inside, each rebar is arranged at a predetermined stacking position regardless of the skill of the operator. Can be held.

It is a schematic sectional drawing of the concrete structure which concerns on one Embodiment of this invention. It is explanatory drawing about the stacking method of the rebar, and is the top view of one rebar. It is explanatory drawing about the stacking method of the rebar, and is the top view which shows the state which the other rebar is superposed on the rebar shown in FIG. 2A. It is a top view of the position holder which concerns on one Embodiment of this invention. It is a front view of the position holder which concerns on one Embodiment of this invention. It is the figure which looked at the state which the position holder was attached to the net-like reinforcing bar from above. It is a figure which looked at the state which the position holder was attached to the net-like reinforcing bar from the PP direction in FIG. It is a figure which shows the attachment procedure of a position holder (the 1). It is a figure which shows the attachment procedure of a position holder (the 2).

Hereinafter, an embodiment of the present invention (hereinafter referred to as the present embodiment) will be described. It should be noted that the embodiments described below are for facilitating the understanding of the present invention and do not limit the present invention. That is, the present invention can be modified or improved without departing from the spirit of the present invention. Further, as a matter of course, the present invention includes the equivalent thereof. Further, the dimensions, shape, material, etc. of each member described below are merely examples, and can be arbitrarily designed as long as the effects of the present invention can be exhibited.

In the following description, one of the two directions orthogonal to each other in the horizontal direction will be referred to as the "first direction", and the other will be referred to as the "second direction".

<< Outline of concrete structure according to this embodiment >>
First, the concrete structure (hereinafter referred to as concrete structure 1) according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of the concrete structure 1.

The concrete structure 1 is a structure made of reinforced concrete and forms the floor of the building. As shown in FIG. 1, a net-like reinforcing bar 10 is embedded in the concrete structure 1 for the purpose of preventing the occurrence of cracks and the like. The net-like reinforcing bar 10 is a known wire mesh, and is configured by arranging a plurality of vertical bars and a plurality of horizontal bars in a grid pattern and welding both reinforcing bars at each intersection. Inside the concrete structure 1, the net-like reinforcing bars 10 are arranged so that the vertical bars are along the first direction and the horizontal bars are along the second direction.

Further, inside the concrete structure 1, as shown in FIG. 1, a plurality of rebars 10 are folded in the vertical direction (corresponding to the thickness direction of the concrete structure 1). Each of the plurality of stacked rebars 10 has the same configuration, and specifically, the length, thickness and number of each of the vertical and horizontal rebars, the spacing between the rebars, and the like are the rebars 10. It is aligned between each other. In FIG. 1, the number of the rebars 10 shown is smaller than the actual number in order to make the illustration easier to understand, and specifically, only two rebars 10 are shown.

Further, in the inside of the concrete structure 1 in the present embodiment, a position holder 20 described later is embedded as a member for holding each of the plurality of stacked rebars 10 at the arrangement position. For convenience of explanation, the position holder 20 is not shown in FIG.

<< How to stack the rebar 10 >>
Next, how to stack the rebar 10 will be described with reference to FIGS. 1, 2A and 2B. 2A and 2B are explanatory views on how to stack the rebars, FIG. 2A is a plan view of one rebar, and FIG. 2B shows another rebar on the rebar shown in FIG. 2A. It is a top view which shows the state in which the reinforcing bars are overlapped. Further, in FIGS. 2A and 2B, the first direction and the second direction are indicated by arrows.

In the following, in order to make the explanation easier to understand, we will focus on two rebars 10 that are adjacent to each other in the vertical direction among the plurality of rebars 10 that are stacked. Here, of the two rebars 10 adjacent to each other in the vertical direction, the rebar 10 located above is referred to as the first rebar 10A, and the rebar 10 located below is referred to as the second rebar 10B.

The first rebar 10A and the second rebar 10B are arranged so that their ends in the second direction overlap each other as shown in FIG. More specifically, the first rebar 10A and the second rebar 10B are the lengths of the overlapping portions in the second direction (the lengths indicated by the symbol t in FIG. 1, and hereinafter, "overlapping allowance". ) Are stacked so that they have a predetermined length.

The set value of the stacking allowance t can be determined to be an arbitrary length, but it is desirable to make it as small as possible from the viewpoint of efficiently using the rebar 10. On the other hand, the state in which the rebars 10 are folded up and down is maintained better as the stacking allowance t is increased. In the present embodiment, the optimum stacking allowance t is set from these two viewpoints. Specifically, the length of the mesh-like reinforcing bar 10 is the length of one mesh (1 mesh) plus a slight extra length. This is set as the stacking allowance t.

The first rebar 10A and the second rebar 10B are stacked at a predetermined location (specifically, a floor installation location) before concrete is placed in the work of constructing the concrete structure 1. Specifically, as shown in FIG. 2A, first, the second rebar 10B is arranged. At this time, as shown in the figure, the second rebar 10B is arranged so that the vertical bar 11B is along the first direction and the horizontal bar 12B is along the second direction.

Then, the first rebar 10A is superposed on the second rebar 10B as shown in FIG. 2B. Specifically, the first rebar 10A is placed on the second rebar 10B so that the vertical rebar 11A of the first rebar 10A is along the first direction and the horizontal rebar 12A is along the second direction. At this time, the horizontal rebar 12A of the first rebar 10A is arranged at a position directly above the horizontal rebar 12B of the second rebar 10B, and the first rebar 10A is arranged so as to overlap by the above-mentioned overlapping allowance t.

By the above procedure, the first rebar 10A and the second rebar 10B are overlapped with each other in a state where a predetermined stacking allowance t is secured, as shown in FIG. 2B. In such a state, as shown in the figure, in the region where the first rebar 10A and the second rebar 10B are overlapped in the second direction (hereinafter referred to as “overlapping region W”), the second rebar 10B The vertical bars 11A of the first rebar 10A are located between the vertical bars 11B.

The color of the reinforcing bars (vertical bars 11A and horizontal bars 12A) constituting the first rebar 10A and the colors of the reinforcing bars (vertical bars 11B and horizontal bars 12B) constituting the second rebar 10B are both the same color (strictly speaking). (Steel color), but in FIG. 2B, for convenience of illustration, the first rebar 10A and the second rebar 10B are shown in different colors.

In the present embodiment, the position holder 20 is used to hold each of the first rebar 10A and the second rebar 10B stacked in a state where a predetermined stacking allowance t is secured at the arrangement position. Used. The position holder 20 is arranged at a position indicated by the symbol XX in FIG. 2B, and is attached to both the first rebar 10A and the second rebar 10B.

As a result of the first rebar 10A and the second rebar 10B being held at their respective placement positions by the position holder 20, the positions of the rebar 10 are displaced during the period for constructing the concrete structure 1 (strictly speaking). Will move in the second direction).

The position holders 20 are used in an number corresponding to the sizes of the first rebar 10A and the second rebar 10B, and are arranged at regular intervals along the first direction. The arrangement interval (pitch) of the position holders 20 can be set to an arbitrary size, but from the viewpoint of cost, it is preferable to set the number of position holders 20 to the minimum necessary number. ..

<< About the position holder 20 >>
Next, the configuration and usage of the position holder 20 will be described with reference to FIGS. 3 to 7B. 3 and 4 are views showing the appearance of the position holder 20, FIG. 3 is a plan view, and FIG. 4 is a front view. 5 and 6 are views showing a state in which the position holder 20 is attached to the net-like reinforcing bar 10, FIG. 5 is a view seen from above, and FIG. 6 is a view taken in the direction of arrow in FIG. It is a figure seen from. 7A and 7B are views showing a procedure for attaching the position holder 20.

The position holder 20 is a component for holding the positions of the first rebar 10A and the second rebar 10B stacked in the vertical direction inside the concrete structure 1. The position holder 20 according to the present embodiment is composed of an elastic steel wire (corresponding to a linear member, hereinafter referred to as an “elastic wire”). More precisely, the position holder 20 is configured by bending the elastic wire so as to have the shape shown in FIGS. 3 and 4.

Further, the surface of each part of the position holder 20 (specifically, the first engaging part 21, the second engaging part 22L, 22R and the connecting parts 23L, 23R, which will be described later) constitutes the first rebar 10A. It is colored in a color different from the color of the reinforcing bar and the color of the reinforcing bar constituting the second rebar 10B, and is colored in yellow in this embodiment. However, the color of each part of the position holder 20 is not limited to yellow, and may be a color other than yellow as long as it is different from the color of the reinforcing bar.

Explaining the configuration of the position holder 20, as shown in FIGS. 3 and 4, the position holder 20 includes a first engaging portion 21, a second engaging portion 22L, 22R, and a connecting portion 23L, 23R. Have. The first engaging portion 21, the second engaging portion 22L, 22R and the connecting portions 23L, 23R are composed of one elastic wire and are integrated.

As shown in FIGS. 5 and 6, the first engaging portion 21 is a portion that engages with the reinforcing bars constituting the first rebar 10A, specifically, the vertical reinforcing bar 11A. The first engaging portion 21 is configured by bending the central portion of the elastic wire constituting the position holder 20 in a substantially U shape along the outer edge of the vertical bar 11A.

As shown in FIGS. 5 and 6, the second engaging portions 22L and 22R are portions that engage with the reinforcing bars constituting the second rebar 10B, specifically, the vertical reinforcing bars 11B, and constitute the position holder 20. It is provided at both ends of the elastic wire. More specifically, one second engaging portion 22L is configured by bending one end of the elastic wire in a substantially C shape along the outer edge of the vertical bar 11B. Similarly, another second engaging portion 22R is configured by bending the other end of the elastic wire in a substantially C shape along the outer edge of the vertical bar 11B.

When the end of the elastic wire is curved to form the second engaging portions 22L and 22R, it may be curved so as to have a substantially Ω shape. However, if the second engaging portions 22L and 22R are formed by being curved in a substantially C shape, they can be easily engaged by the vertical streaks 11B.

Hereinafter, for convenience of explanation, one second engaging portion 22L will be referred to as a “left second engaging portion 22L”, and the other second engaging portion 22R will be referred to as a “right second engaging portion 22R”. I will call it.

Explaining the reinforcing bar with which the first engaging portion 21 and the second engaging portions 22L and 22R are engaged, the first engaging portion 21 and the second engaging portions 22L and 22R both extend in the first direction. It engages with the reinforcing bars, that is, the vertical bars 11A and 11B. More specifically, the first engaging portion 21 is located at a position sandwiched between the vertical bars 11B of the second rebar 10B in the overlapping region W among the plurality of vertical bars 11A of the first rebar 10A. Engage with muscle 11A. Further, in the present embodiment, as shown in FIG. 6, the first engaging portion 21 engages with the vertical bar 11A from above the vertical bar 11A.

As shown in FIG. 5, the second engaging portions 22L and 22R engage with the vertical bars 11B of the second rebar 10B on both sides of the portion where the first engaging portions 21 are engaged with the vertical bars 11A. is doing. Specifically, the second engaging portion 22L on the left side is adjacent to the vertical reinforcing bar 11A to which the first engaging portion 21 engages in the overlapping region W among the plurality of vertical reinforcing bars 11B included in the second mesh reinforcing bar 10B. Engage with the vertical bar 11B at the position. More strictly speaking, the second engaging portion 22L on the left side is the end of the overlapping region W in the second direction among the vertical bars 11B existing at both side positions of the vertical bars 11A to which the first engaging portion 21 engages. Engage with the vertical bar 11B closer to the tip (free end) of the second rebar 10B at the position.

The second engaging portion 22R on the right side engages with the vertical streaks 11B located adjacent to the vertical streaks 11A to which the first engaging portions 21 engage in the overlapping region W. More strictly speaking, the second engaging portion 22R on the right side is the end of the overlapping region W in the second direction among the vertical bars 11B existing at both side positions of the vertical bars 11A to which the first engaging portion 21 engages. It engages with the vertical bar 11B farther from the tip (free end) of the second rebar 10B at the position.

In this embodiment, as can be seen from FIGS. 5 and 6, the vertical bar 11B with which the second engaging portion 22L on the left side engages becomes the vertical bar 11B with which the second engaging portion 22R on the right side engages. By comparison, the first engaging portion 21 is farther from the vertical bar 11A to which the first engaging portion 21 is engaged. That is, the distance between the vertical bar 11B with which the second engaging portion 22L on the left side is engaged and the vertical bar 11A with which the first engaging portion 21 is engaged (hereinafter referred to as the first reinforcing bar spacing d1) is the second engagement on the right side. It is longer than the distance between the vertical bar 11B with which the joint portion 22R is engaged and the vertical bar 11A with which the first engaging portion 21 is engaged (hereinafter referred to as the second reinforcing bar spacing d2).

Further, in the present embodiment, as shown in FIG. 6, the second engaging portions 22L and 22R are engaged with the vertical bar 11B from below the corresponding vertical bar 11B.

The connecting portions 23L and 23R are portions that connect between the first engaging portion 21 and the second engaging portions 22L and 22R, and are provided at two locations in the position holder 20 as shown in FIGS. 3 and 4. Has been done. The connecting portion 23R (hereinafter, for convenience, referred to as “right connecting portion 23R”) that connects between the second engaging portion 22R on the right side and the first engaging portion 21 is from the first engaging portion 21 to the right side. It extends linearly toward the second engaging portion 22R of the above. The extension amount of the connecting portion 23R on the right side is set to a length corresponding to the above-mentioned stacking allowance t. Here, the extension amount of the connecting portion 23R on the right side is the distance from the connecting portion with the first engaging portion 21 to the joining portion with the second engaging portion 22R on the right side.

The connecting portion 23L (hereinafter, for convenience, referred to as “left connecting portion 23L”) that connects between the second engaging portion 22L on the left side and the first engaging portion 21 is left from the first engaging portion 21. It extends toward the second engaging portion 22L of the above, and is bent like a crank in the middle. More specifically, the connecting portion 23L on the left side has a first extending portion 24, a second extending portion 25, and a third extending portion 26, as shown in FIGS. 3 and 4. The first extending portion 24 is a portion extending linearly from the first engaging portion 21 toward the side where the second engaging portion 22L on the left side is located. The second extension portion 25 is a portion that is adjacent to the first extension portion 24 and extends in a direction intersecting the first extension portion 24. The third extension portion 26 is a portion that connects the second engaging portion 22L on the left side and the second extension portion 25 and extends along the first extension portion 24.

Then, the connecting portion 23L on the left side can be elastically deformed so that the third extending portion 26 swings with the second extending portion 25 as a fulcrum. Further, the extension amount of the connecting portion 23L on the left side is set to a length corresponding to the above-mentioned stacking allowance t. Here, the extension amount of the connecting portion 23L on the left side is the distance from the connecting portion with the first engaging portion 21 to the joining portion with the second engaging portion 22L on the left side.

By attaching the position holder 20 configured as described above to each of the first rebar 10A and the second rebar 10B in the overlapping region W, each rebar is formed at the arrangement position where a predetermined stacking allowance t is secured. It becomes possible to hold the reinforcing bar 10. Specifically, in a state where each of the first engaging portion 21 and the second engaging portions 22L and 22R is engaged with the corresponding vertical bars 11A and 11B, as shown in FIG. 5, along the second direction. The first engaging portion 21, the second engaging portion 22L, 22R, and the connecting portions 23L, 23R are arranged side by side.

Then, by engaging each of the first engaging portion 21 and the second engaging portions 22L and 22R with the corresponding vertical bars 11A and 11B, the first reinforcing bar spacing d1 and the second reinforcing bar spacing d2 are set in the second direction. The length of the connecting portions 23L and 23R is maintained according to the extension amount.

More precisely, the first reinforcing bar spacing d1 is maintained at a length corresponding to the extension amount of the left connecting portion 23L in the second direction. Similarly, the second reinforcing bar spacing d2 is maintained at a length corresponding to the extension amount of the right connecting portion 23R in the second direction. Here, the sum of the length corresponding to the extension amount of the connecting portion 23L on the left side and the length corresponding to the extension amount of the connecting portion 23R on the right side is equal to the set value of the overlap margin t described above. Is set to. Therefore, if the first rebar spacing d1 and the second rebar spacing d2 are maintained at a length corresponding to the extension amount of the connecting portions 23L and 23R in the second direction, the first rebar 10A and the second rebar 10B will be. , The predetermined stacking allowance t is held at the secured arrangement position.

Next, a procedure for attaching the position holder 20 having the above-described configuration to both the first rebar 10A and the second rebar 10B will be described with reference to FIGS. 5, 6, 7A and 7B. In addition, in FIGS. 7A and 7B, in order to make the illustration easier to understand, the position holder 20 and the reinforcing bars (reinforcing bars) with which the first engaging portion 21 and the second engaging portions 22L and 22R of the position holder 20 are engaged ( Specifically, only the vertical bars 11A and 11B) are shown.

In attaching the position holder 20, the first rebar 10A and the second rebar 10B are stacked so that a predetermined stacking allowance t is secured by the above procedure. After the first rebar 10A and the second rebar 10B are arranged in this way, the operator first holds the position holder 20 and overlaps the position holder 20 with the position above the region W, strictly speaking. Is set at an upper position of the attachment point (XX position in FIG. 2B) of the position holder 20.

Next, the operator attaches each of the first engaging portion 21 and the second engaging portions 22L and 22R of the position holder 20 to the corresponding reinforcing bars in the overlapping region W by the procedure shown in FIGS. 7A and 7B. Engage with (vertical bars 11A, 11B). Specifically, first, as shown in FIG. 7A, of the vertical bars 11A and 11B in the overlapping region W, the right side of the vertical bars 11B adjacent to the vertical bars 11A to which the first engaging portion 21 engages. The second engaging portion 22R of the above is hooked from below and engaged. Next, with the second engaging portion 22R on the right side locked to the vertical bar 11B, the entire position holder 20 is rotated in the direction of the thick arrow in FIG. 7A with the vertical bar 11B as a fulcrum. As a result, the first engaging portion 21 is caught and engaged with the vertical bar 11A from above the vertical bar 11A.

When the above procedure is completed, the first engaging portion 21 engages with the vertical bar 11A, and the second extending portion 25 provided on the left connecting portion 23L engages with the first engaging portion 21. It comes along the vertical streak 11A.

On the other hand, immediately after the first engaging portion 21 is engaged with the vertical bar 11A, the second engaging portion 22L on the left side is engaged with the vertical bar 11B (strictly speaking, the second engaging portion 22R on the right side is engaged. On the opposite side of the vertical bar 11B, the first engaging portion 21 is not engaged with the vertical bar 11B) adjacent to the engaged vertical bar 11A, and as shown in FIG. 7B, the vertical bar 11B It is located above.

Therefore, the operator deforms the left connecting portion 23L so that the third extending portion 26 swings with the second extending portion 25 as a fulcrum. As a result, the second engaging portion 22L on the left side wraps around to the lower position of the vertical bar 11B as shown in FIG. 7B, and is engaged (hooked) with the vertical bar 11B from below. When the above procedure is completed, the attachment of the position holder 20 is completed.

By attaching the position holder 20 to each of the first mesh reinforcing bar 10A and the second mesh reinforcing bar 10B by the above procedure, thereafter, the vertical bar 11A to which the first engaging portion 21 is engaged and the left side first. The distance between the two engaging portions 22L and the engaged vertical bars 11B, that is, the first reinforcing bar spacing d1 is maintained at a length corresponding to the extension amount of the left connecting portion 23L in the second direction. Similarly, the distance between the vertical bar 11A with which the first engaging portion 21 is engaged and the vertical bar 11B with which the second engaging portion 22R on the right side is engaged, that is, the second reinforcing bar spacing d2 is on the right side in the second direction. The length of the connecting portion 23R can be maintained according to the extension amount.

Therefore, the operator visually recognizes the position holder 20 attached to the first rebar 10A and the second rebar 10B in the overlapping region W, so that the first rebar 10A and the second rebar 10B are predetermined. It is possible to confirm that they are overlapped by the overlapping allowance t. At this time, since the surface of the position holder 20 is colored in yellow, the above confirmation work can be easily performed.

<< Other Embodiments >>
The configuration of the position holder and the concrete structure of the present invention has been described above with specific examples. However, the above embodiment is merely an example, and other embodiments may be considered. For example, in the above embodiment, the connecting portion 23L on the left side is bent in a crank shape at a position in the middle thereof, but the present invention is not limited to this. The connection portion 23L on the left side may extend linearly from the first engaging portion 21 to the position where it reaches the second engaging portion 22L on the left side.

Further, in the above embodiment, the second engaging portions 22L and 22R are provided at both ends of the position holder 20, but the present invention is not limited to this. Only one second engaging portion may be provided at one end of the position holder 20.

Further, in the above embodiment, when constructing the concrete structure 1 forming the floor of the building, the position holder 20 is used to hold each of the plurality of folded rebars 10. However, the concrete structure 1 to be constructed is not limited to the floor, and may be a concrete structure 1 having a structure in which a plurality of folded rebars 10 are embedded inside, and is a concrete structure other than the floor. It is possible to use the position holder of the present invention when constructing 1.

1 Concrete structure 10 Reinforcing bar 10A First rebar 10B Reinforcing rebar 11A Vertical rebar (reinforcing bar)
11B Vertical bar (reinforcing bar)
12A Horizontal bar 12B Horizontal bar 20 Position holder 21 First engagement part 22L Second engagement part 22R Second engagement part 23L Connection part 23R Connection part 24 First extension part 25 Second extension part 26 Third extension part W Overlapping area

Claims (10)

A position holder for holding the positions of the first rebar and the second rebar stacked in the thickness direction of the concrete structure inside the concrete structure.
The first engaging portion that engages with the reinforcing bars constituting the first rebar, and
A second engaging portion that engages with the reinforcing bars constituting the second rebar, and
It has a connecting portion that connects between the first engaging portion and the second engaging portion, and has.
The connecting portion includes a first extending portion extending from the first engaging portion and a second extending portion adjacent to the first extending portion and extending in a direction intersecting the first extending portion. It has a protruding portion, a third extending portion that connects the second engaging portion and the second extending portion, and extends along the first extending portion.
A position holder characterized in that the third extension portion can be deformed so as to swing around the second extension portion as a fulcrum . When each of the first engaging portion and the second engaging portion engages with the reinforcing bar, the distance between the reinforcing bar with which the first engaging portion engages and the reinforcing bar with which the second engaging portion engages. However, according to claim 1, the length of the connecting portion is maintained according to the distance from the connecting portion with the first engaging portion to the joining portion with the second engaging portion. Position holder. The first engaging portion, the second engaging portion, and the connecting portion are composed of one linear member and are integrated.
The first engaging portion is configured by bending the central portion of the linear member along the outer edge of the reinforcing bar constituting the first rebar.
The second aspect of claim 2 is characterized in that the second engaging portion is configured by bending the end portion of the linear member along the outer edge of the reinforcing bar constituting the first rebar. Position holder. The second engaging portion is configured at both ends of the linear member.
The position holder according to claim 3 , wherein the second engaging portion is engaged with the reinforcing bar on both sides of the portion where the first engaging portion is engaged with the reinforcing bar. Each of the first engaging portion and the second engaging portion engages with a reinforcing bar extending in the first direction.
When each of the first engaging portion and the second engaging portion is engaged with the reinforcing bar, the first engaging portion and the second engaging portion are along the second direction orthogonal to the first direction. The position holder according to any one of claims 2 to 4 , wherein the connecting portions are lined up and the distance is maintained at a length corresponding to the distance in the second direction. The claim is characterized in that each of the first engaging portion and the second engaging portion is engaged with the reinforcing bar in the region where the first rebar and the second rebar are overlapped. The position holder according to any one of 1 to 5 . When the thickness direction is along the vertical direction, the first engaging portion engages with the reinforcing bar constituting the first rebar located above the second rebar from above the rebar. The second engaging portion is characterized in that it engages with the reinforcing bar constituting the second rebar located below the first rebar from below the rebar. The position holder according to any one of the above items. The first engaging portion, the second engaging portion, and the connecting portion have a color different from the color of the reinforcing bar constituting the first rebar and the color of the reinforcing bar constituting the second rebar. The position holder according to any one of claims 1 to 7, wherein the position holder is colored. It ’s a concrete structure,
A position holder for holding the positions of the first rebar and the second rebar stacked in the thickness direction of the concrete structure inside the concrete structure is provided.
The position holder is
The first engaging portion that engages with the reinforcing bars constituting the first rebar, and
A second engaging portion that engages with the reinforcing bars constituting the second rebar, and
It has a connecting portion that connects between the first engaging portion and the second engaging portion, and has.
The connecting portion includes a first extending portion extending from the first engaging portion and a second extending portion adjacent to the first extending portion and extending in a direction intersecting the first extending portion. It has a protruding portion, a third extending portion that connects the second engaging portion and the second extending portion, and extends along the first extending portion.
A concrete structure characterized in that the third extension portion can be deformed so as to swing around the second extension portion as a fulcrum . The concrete structure according to claim 9, wherein the first rebar and the second rebar are stacked in the vertical direction, forming the floor of the building.

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