JP2004251103A - Reinforcement spacer, and manufacturing method of concrete structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily regulate covering dimension of a reinforcing bar in a reinforced concrete structure. <P>SOLUTION: In a reinforcing spacer 51, projecting hook arms 37 and 39 is extended upward from both sides of a spacer main body 33 forming the reinforcing spacer. These hook arms 37 and 39 have hook parts 41 and 43 to be hooked on a lateral reinforcing bar 5 in upper parts thereof. Between the hook parts 37 and 39, one end surface of the spacer main body 33 is formed with a recessed groove 45 as an abutment part for housing a vertical reinforcing bar 3. In the spacer main body 33, length between the recessed groove 45 and the other outer end spaced apart from the recessed groove 45 is set as a covering dimension. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing spacer and a method of manufacturing a concrete structure, and more particularly, to a reinforcing spacer in a reinforced concrete structure in which a reinforcing bar is embedded, the cover size of which can be easily controlled, and a method of manufacturing a concrete structure using the same. Regarding improvement.

  In a concrete structure 1 such as a reinforced concrete wall in which a reinforcing steel bar is embedded, generally, as shown in FIGS. 11 and 12, vertical reinforcing bars 3 and horizontal reinforcing bars 5 are arranged vertically and horizontally at predetermined intervals. The contact portions where the horizontal reinforcing bars 5 intersect are fastened and fixed with binding wires (not shown, the same applies hereinafter), and temporarily fixed to the foundation 7 of the concrete structure 1, and the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 are interposed therebetween. It is constructed by placing it, sandwiching it between the formwork 9 and 11 from both sides, and driving concrete between the formwork 9 and 11.

  In FIG. 11, for the sake of simplicity, the upper portion of the concrete structure 1 is cut off from the middle to show only the internal vertical reinforcing bars 3 and the horizontal reinforcing bars 5, and the illustration of the molds 9 and 11 is omitted. Further, ribs protrude from the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 at predetermined short intervals, but are not shown in the drawing.

  In such a concrete structure 1, as shown in FIG. 12, from the viewpoint of ensuring the durability of the vertical reinforcing bars 3 and the horizontal reinforcing bars 5, adhesion to concrete material, fire resistance, and the like, as shown in FIG. Covering dimensions (covering thickness) S1 and S2 from Z to the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 are defined by rules, and it is required to observe them.

  The cover size is generally referred to as the concrete thickness measured between the surface of the vertical reinforcing bar 3 or the horizontal reinforcing bar 5 and the outer surface Z of the concrete structure 1 at the shortest distance.

  For this reason, as shown in FIG. 12, during the construction of the concrete structure 1, the concrete spacers 13 having the same size as the cover size S1 are attached to the horizontal reinforcing bars 5 and the vertical reinforcing bars 3, and then the concrete is driven.

  Conventionally, various types of such reinforcing bar spacers 13 have been proposed. For example, as shown in FIG. 13, a block-shaped spacer body 15 made of concrete or mortar having the same lateral dimension as the cover dimension S1, A well-known structure having a pair of arc-shaped support pieces 17 and 19 protruding from one end face in the lateral direction is well known.

  Japanese Patent Application Laid-Open No. 2002-332714 as Patent Document 1 is of this type.

  As shown in FIG. 14, the reinforcing bar spacer 13 is used by inserting the horizontal reinforcing bar 5 between the supporting pieces 17 and 19 and sandwiching the horizontal reinforcing bar 5 between the supporting pieces 17 and 19. That is, concrete is driven by arranging the opposite end so as to abut the form 9 (11).

  As another reinforcing bar spacer 21, as shown in FIG. 15, a semicircular inner ring portion 23 and a C-shaped outer ring portion 25 are arranged concentrically and connected to each other by a plurality of connecting posts 27. And a pair of projecting pieces 29 are made to protrude from the opposite end of the C-shaped outer ring part 25 to the vicinity of the inner ring part 23 so as to be narrowed. There is also known one in which an insertion portion 31 is formed by a portion and a dimension between the inner wall of the horizontal reinforcing bar 5 and the outer periphery of the outer ring portion 25 is selected as a cover size.

  Japanese Unexamined Utility Model Publication No. 5-16937 as Patent Document 2 is of this type.

The reinforcing bar spacer 21 is used in such a manner that the horizontal reinforcing bar 5 or the like is press-fitted from between the projecting pieces 29 and is housed in the insertion portion 31 so that the form 9 abuts on the outer ring portion 25.
JP-A-2002-332714 JP-A-5-16937

  However, since the reinforcing bar spacer 13 shown in FIG. 13 simply sandwiches and holds one of the vertical reinforcing bars 3 and the horizontal reinforcing bars 5, pressure is applied from the axial direction of the vertical reinforcing bars 3 and the horizontal reinforcing bars 5. Can also resist displacement, but it is easy to be rotationally displaced by an external force from a direction perpendicular to the vertical reinforcing bars 3 and the horizontal reinforcing bars 5, and it is difficult to perform positioning so as to obtain an accurate cover dimension position.

  In addition, during the construction process, there are operations such as rebar assembling work, formwork arrangement, and (raw) concrete casting, so that external force is easily applied to the reinforcing bar spacer 13 during the work, and it is necessary to adjust the position before concrete casting. And the operation is extremely complicated.

  In particular, at the time of concrete placement, an external force is likely to be applied to the reinforcing bar spacers 13 from around the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 by the concrete material, and a configuration for suppressing the rotational displacement of the reinforcing bar spacers 13 has been desired.

  Further, when it is necessary to attach the reinforcing bar spacer 13 in the vicinity of the contact portion where the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 intersect, there is a difficulty that the reinforcing bar spacer 13 has a binding wire and is difficult to mount.

  On the other hand, in the reinforcing bar spacer 21 shown in FIG. 15, since the outer ring portion 25 is circular, even if the vertical reinforcing bar 3 or the horizontal reinforcing bar 5 is rotated after being inserted into the insertion portion 31, the form frame 9 ( 11) Although it is easy to position accurately, since it is formed by molding from synthetic resin, it is difficult to use it according to the specifications such as specifications due to the difference in material from the concrete material and the difference in thermal expansion coefficient, There was also the problem of limited use locations.

  In addition, generally, it is necessary to prepare a plurality of types of reinforcing bar spacers in accordance with the diameter and cover size of the reinforcing bars 3 and 5, which is likely to cause an increase in cost. There was a concern that extra storage space would be required and the quality would deteriorate due to long-term storage.

  The present invention has been made to solve such a problem, and it is difficult to rotate or displace even when supported by a horizontal reinforcing bar or a vertical reinforcing bar, easy to handle, and accurate without adjusting the mounting position one by one. It is an object of the present invention to provide a method for manufacturing a reinforcing bar spacer and a concrete structure which can obtain a cover size position and have a high work efficiency.

  In order to solve such a problem, the reinforcing bar spacer of the present invention is a reinforcing bar spacer that regulates a cover size of reinforcing bars vertically and horizontally embedded in a concrete structure, and includes a spacer main body and a horizontal or vertical reinforcing bar. A pair of hook members extending at a distance from each other from the spacer body so as to be hooked on the reinforcing bar, and the spacer body is connected to the horizontal or vertical reinforcing bar with the horizontal or vertical reinforcing bar therebetween. When hooked, there is provided a contact portion for contacting the vertical or horizontal reinforcing bar between the hook members, and a portion between the contact portion and an outer end farther from the contact portion is selected to have the above-mentioned cover size.

  In the reinforcing bar spacer according to the present invention, it is possible to form a recess in which the reinforcing bar fits as a contact portion provided on the spacer body.

  Further, in the reinforcing bar spacer of the present invention, a configuration is also possible in which a holding member for holding the reinforcing bars removably from both sides of the contact portion is protruded from the spacer body.

  Furthermore, in the reinforcing bar spacer of the present invention, the pair of hook members are rod-shaped bodies extending from the spacer main body, and the tip side is formed by folding back in a semicircular shape according to the outer shape of the reinforcing bar. It is also possible to adopt a configuration in which the distal end side is widened by a rod-shaped body protruding from the spacer body.

  Still further, in the reinforcing bar spacer of the present invention, the pair of hook members that are folded back may be configured such that the tip ends are folded back in opposite directions.

  Furthermore, in the reinforcing bar spacer of the present invention, a configuration is also possible in which the spacer body is formed so that the distance between the contact portion and the outer end can be changed.

  The method for manufacturing a concrete structure according to the present invention includes a step of combining and fixing reinforcing bars vertically and horizontally, a spacer body, and a pair of spacers extending at intervals from the spacer body so as to be hooked on the horizontal or vertical reinforcing bars. A hook member is provided between the hook members, and an abutting portion that abuts on the reinforcing bar is provided on the spacer main body, and a distance between outer ends of the spacer main body that is far from the abutting portion corresponds to a cover size in the reinforced concrete structure. A step of preparing the selected reinforcing bar spacers, placing a vertical or horizontal reinforcing bar between the hook members and hooking the hook member on the horizontal or vertical reinforcing bar, and bringing the contact portion into contact with the vertical or horizontal reinforcing bar; Attaching the reinforcing spacers to the reinforcing bars, providing a form so as to contact the outer end surfaces of the plurality of reinforcing spacers, By implanting cleat it is intended to include a step of embedding them rebar.

  The method for manufacturing a reinforcing bar spacer and a concrete structure according to the present invention is such that the reinforcing bar spacer is hardly rotated or displaced even when supported near a contact portion where the horizontal reinforcing bar and the vertical reinforcing bar intersect with each other. An accurate cover size position can be obtained without re-adjusting the position one by one, and the working efficiency is also high.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the same reference numerals are given to parts common to the conventional example.

  FIGS. 1, 2 and 3 are a side view, a plan view and a perspective view showing an embodiment of a reinforcing bar spacer according to the present invention.

  In FIGS. 1 to 3, the spacer body 33 has a rectangular flat surface 35 on one side, and a block having a curved end formed by projecting so that the four sides extending from each edge of the flat surface 35 taper slightly. It is shaped like a flake and is made of a conventionally known concrete material or mortar material.

  The concrete material in the spacer main body 33 of the present invention also includes a mortar material, and the shape of the spacer main body 33 is arbitrary according to the purpose.

  A pair of hook arms 37 and 39 made of a relatively thick hard wire protrude and extend upward from a center position on both opposing side surfaces of the spacer body 33 and close to the flat surface 35.

  The hook arms 37 and 39 are formed in substantially the same shape and in the same direction as each other, and the upper portion thereof is formed in a substantially semicircular shape or a U-shaped curved shape similar to or close to the outer shape of the horizontal reinforcing bar 7. Hook arms 41 and 43 which are bent upward (outward) so that the tips thereof are opened from the hook portions 41 and 43, and are hook arms as hook members for elastically hooking the hook portions 41 and 43 to the horizontal reinforcing bar 7. 37 and 39 are functioning.

  The hook arms 37 and 39 are formed by bending one wire, and are connected and supported in the spacer body 33 as shown by a broken line in the drawing, but can be formed separately from the two wires. .

  At the center of the flat surface 35 of the spacer body 33, a concave groove 45 penetrating in the vertical direction is formed.

  The concave groove 45 is formed in the same shape as the outer shape of the vertical reinforcing bar 3 combined with the horizontal reinforcing bar 5 or in a semi-circular cross section formed slightly larger, and abuts when the vertical reinforcing bar 3 is settled. (Contact surface) is formed.

  A pair of clamping pieces 47 and 49 formed by bending a wire in an arc shape are projected from both sides of the concave groove 45 so as to form a circular cross section together with the concave groove 45 at the center of the flat surface 35. The reinforcing bar spacer 51 of the invention is configured.

  The pair of holding pieces 47 and 49 and the concave groove 45 form a cross section which is the same as or close to the outer shape of the vertical reinforcing bar 3, and can elastically hold the vertical reinforcing bar 3. That is, the holding pieces 47 and 49 form a holding member.

  The holding pieces 47 and 49 are also bent from one wire, and are connected and supported in the spacer body 33 as shown by a broken line in the figure, but can be formed separately from each other by two wires.

  In the reinforced spacer 51, the distance between the bottom of the concave groove 45 of the flat surface 35 of the spacer main body 33 and the tip P is set to the above-described cover size S1 or S2.

  That is, in the spacer body 33, the dimension between the outer ends in the opposite direction perpendicular to the directions of the hook arms 37 and 39 and far from the bottom of the concave groove 45 is selected as the cover size S1 or S2.

  As shown in FIG. 1, the reinforcing bar spacers 51 are arranged such that the hook portions 41, 43 of the hook arms 37, 39 are shifted from the concave groove 45 by the diameter of the vertical reinforcing bar 3 and are arranged vertically and horizontally at predetermined intervals. As shown in FIG. 4, the vertical reinforcing bar 3 is placed between the hook arms 37 and 39 to fix the contact portion where the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 intersect with each other with a soft binding wire (wire). The hooks 41 and 43 are elastically hooked on the horizontal reinforcing bar 5 and hooked, and the vertical reinforcing bar 3 is press-fitted from between the holding pieces 47 and 49 so as to be elastically held by the holding pieces 47 and 49 and the concave groove 45. Has become.

  Therefore, the reinforcing bar spacer 51 of the present invention is supported by the horizontal reinforcing bar 5 by the hook arms 37 and 39 and supported by the vertical reinforcing bar 3 by the holding pieces 47 and 49 and the concave groove 45. It is difficult to rotate or displace.

  Moreover, the reinforcing bar spacer 51 of the present invention places the vertical reinforcing bar 3 between the hook arms 37 and 39, hooks the hook portions 41 and 43 on the horizontal reinforcing bar 5, and press-fits the vertical reinforcing bar 3 from between the holding pieces 47 and 49. Can be supported and fixed by itself, and can also be attached near the contact portion where the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 intersect, so that it is easy to handle and accurate without re-adjusting the position of the reinforcing bar spacer 51 once supported. The position of the fogging dimension is obtained, and the work efficiency is high.

  In the reinforcing bar spacer 51 having the above-described configuration, the hook arms 37 and 39 are formed to be bent in substantially the same shape and the same direction. However, as shown in FIG. Alternatively, the other hook arm 53 may be bent in the opposite direction, that is, 180 ° in the opposite direction.

  With the reinforcing bar spacer 55 having such a configuration, there is an advantage that the hook arms 37 and 53 are less likely to come off from the horizontal reinforcing bar 5.

  The cover dimensions S1 and S2 regulated by the reinforcing steel spacers 51 and 55 vary from several cm to several tens cm depending on the concrete structure and its construction environment. It is necessary to prepare a plurality of types of reinforcing bar spacers 51 and 55 selected for the dimensions S1 and S2 in advance.

  Therefore, as shown in FIG. 6, the spacer body is divided into a first spacer portion 57 and a second spacer portion 59 along the fogging dimensions S1 and S2, and, for example, a screw portion is formed from the end face of the second spacer portion 59. It is preferable that the reinforcing bar spacer 65 be formed by forming the screw hole 63 into which the screw portion 61 can be screwed in from the tip end surface of the first spacer main body 57 while the 61 is projected.

  In the reinforcing bar spacer 65 having such a configuration, the length between the first and second spacer portions 57 and 59 changes by rotating the first or second spacer portions 57 and 59, and the reinforcing spacer 65 is The length between the bottom of the concave groove 45 and the outer end P of the second spacer portion 59 facing the concave groove 45 is variable, and various cover sizes can be set. Can support selection.

  In addition, if a plurality of second spacer portions 59 having different dimensions regarding the fogging size are prepared, a wider range of fogging dimension can be selected.

  The above-mentioned reinforcing bar spacer 51 hooks the hook arms 37 and 39 to the horizontal reinforcing bar 5 and press-fits the vertical reinforcing bar 3 from the holding pieces 47 and 49 to support it. The reinforcing bar spacer 51 of the present invention can be configured such that the horizontal reinforcing bar 5 is hooked so that the hook arms 37 and 39 are hooked on the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 is press-fitted from between the holding pieces 47 and 49 so as to be supported laterally. It is. Specifically, FIG. 4 is in a state where it is rotated by 90 °. The same applies to the reinforcing bar spacers 55 and 65 and the like.

  Further, the above-described reinforcing bar spacer 51 has a configuration in which the hook arms 37 and 39 are extended from the block-shaped spacer main body 33, but in the present invention, a configuration in which the spacer main body and the hook arm are integrally formed is also possible.

  For example, as shown in FIG. 7, two elongated strips 67 and 69 made of, for example, an iron plate are integrally connected in a U-shape to form a spacer body 71 that sandwiches the vertical reinforcing bar 3, and one of the spacer bodies 71 is elongated. The band-shaped hook arms 73 and 75 extend perpendicularly and integrally from both ends of one of the band-shaped pieces 67 in a plane, and the distal end side thereof is formed into a semicircle or U-shape to form the horizontal reinforcing bar 5. And a curved portion 81 as a contact portion in which the outer periphery of the vertical reinforcing bar 3 fits about half in the longitudinal center of the strip 67.

  On the strips 67 and 69, a concrete knob 83 forming the spacer body 71 and a screw rod 85 protruding therefrom are screwed from the strip 67 side to form a movable member 87, and a reinforcing bar spacer 89 is formed. I have. The dimension between the curved portion 81 of the strip 67 and the outer end of the knob 83 is the cover size.

  In the configuration shown in FIG. 7, the vertical reinforcing bar 3 and the horizontal reinforcing bar 7 are shown left and right reversed in relation to the above-described configuration, and any of them may be employed in the embodiment of the present invention.

  In addition to the above-described effects, such a reinforcing bar spacer 89 can change the cover size by rotating the knob 83 to change the length of protrusion from the strips 67 and 69, and can change the cover size. It is also possible to hold the vertical reinforcing bar 3 between 67 and 69.

  The configuration shown in FIG. 8 is different from the configuration shown in FIG. 7 in that a spacer main body in which, for example, two elongated strips 67 and 69 made of an iron plate are integrally connected in a U-shape to sandwich the vertical reinforcing bar 3. A knob 83 that forms the spacer body 91 and a screw rod 85 protruding therefrom are screwed into the strips 67 and 69 from the strip 69 to form a movable member 87, thereby forming a reinforcing bar spacer 93. I have.

  In the configuration shown in FIG. 8 as well, although not shown, a curved portion is formed on the strip 67 or 69 where the outer periphery of the vertical reinforcing bar 3 partially fits and abuts, and protrudes from the curved portion and the strip 69. The dimension between the outer ends of the knobs 83 is a cover dimension. Other configurations are almost the same as those in FIG.

  As described above, the reinforcing bar spacer 51 of the present invention hooks the hook arms 37 and 39 to the vertical reinforcing bar 3 and press-fits the horizontal reinforcing bar 5 from between the holding pieces 47 and 49 to support the horizontal reinforcing bar 5 together with the concave groove 45. Even if it is supported in the lateral direction, it is hard to fall or displace, and the range of use is expanded. The same applies to the other reinforcing bar spacers 55, 65, 89, and 93.

  The entire shape and bent shape of the hook arms 37, 39, 53, 73, 75 as hook members in the reinforcing bar spacers 51, 55, 65, 89, 93 are arbitrary, and the outer shapes of the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 are optional. The material is not limited to wire, but is preferably a metal rod-shaped member including a steel plate-shaped band from the viewpoint of strength and the like.

  In addition, the contact portions provided on the reinforcing bar spacers 51, 55, 65, 89, and 93 so that the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 abut against each other are not limited to the above-described concave grooves 45 and the curved portions 81. A plurality of projections and the like may be arranged to position the vertical reinforcing bar 3 and the horizontal reinforcing bar 5, but a concave portion such as the concave groove 45 or the curved portion 81 may be preferable.

  Moreover, the recess is located between the hook arms 37, 39, 53, 73 and 75, and is pressed against the vertical reinforcing bar 3 and the horizontal reinforcing bar 5 by the urging force from the outer ends of the spacer bodies 15, 33, 71 and 91. What is necessary is just to be formed.

  Further, the holding pieces 47 and 49 as the holding members also have an arbitrary overall shape and bent shape, and may be formed according to the outer shape of the vertical reinforcing bar 3 and the horizontal reinforcing bar 5, and the material is not limited to wire.

  Further, the variable length mechanism between the first or second spacer portions 57 and 59 and the variable length mechanism of the strips 67 and 69 and the knob portion 83 protruding therefrom in the reinforcing bar spacers 65, 89 and 93 are described above. The present invention is not limited to the configuration, and can be implemented by a conventionally known device.

  Next, a method for manufacturing a concrete structure according to the present invention using the above-described reinforcing bar spacers 51, 55, 65, 89, and 93 will be briefly described.

  First, as shown in FIG. 9, the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 are combined vertically and horizontally at predetermined intervals and fixed, and the contact portions where the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 intersect are fastened and fixed with wires to form a concrete structure. Temporarily fixed to the base 7 of the object 1.

  Next, as shown in FIG. 9, the vertical reinforcing bar 3 is placed between the hook arms 37, 39, 53 of the reinforcing bar spacer 51, and the hook arms 37, 39 are hooked so as to be hooked on the horizontal reinforcing bar 5. The vertical reinforcing bar 3 is press-fitted between 49 and abuts against the concave groove 45, and the vertical reinforcing bar 3 is elastically held between the holding pieces 47 and 49 and the concave groove 45 (see FIG. 4).

  Thereafter, as shown in FIG. 10, the vertical reinforcing bars 3 and the horizontal reinforcing bars 5 are placed therebetween, and the formwork 9, 11 is arranged and sandwiched from both sides so as to abut the reinforcing bar spacer 51, and is interposed between the formwork 9, 11. The concrete structure 1 is constructed by driving and solidifying the concrete. The same applies to other reinforcing bar spacers 55, 65, 89, 93 according to the present invention.

  In the method for manufacturing a concrete structure according to the present invention as described above, the horizontal reinforcing bar 5 and the vertical reinforcing bar 5 can be formed only by hooking the reinforcing bar spacers 51, 55, 65, 89, 93 of the present invention on the horizontal reinforcing bar 5 and abutting the vertical reinforcing bar 3. 3, it is difficult to rotate or displace with respect to 3, the handling is simple, the rebar spacer 51 can be positioned so as to obtain an accurate cover size position without re-adjusting the position of the reinforcing spacer 51, and the working efficiency is high.

It is a side view showing an embodiment of a reinforcing bar spacer concerning the present invention. FIG. 2 is a plan view showing an embodiment of a reinforcing bar spacer according to the present invention. It is a perspective view showing an embodiment of a reinforcing bar spacer concerning the present invention. FIG. 4 is a perspective view showing a use form of the reinforcing bar spacer according to the present invention. It is a perspective view showing other embodiments of a reinforcing bar spacer concerning the present invention. FIG. 10 is a plan view (partly in cross section) showing another embodiment of a reinforcing bar spacer according to the present invention. It is a perspective view showing still another embodiment of a reinforcing bar spacer concerning the present invention. It is a perspective view showing still another embodiment of a reinforcing bar spacer concerning the present invention. It is a perspective view explaining the manufacturing method of the concrete structure concerning the present invention. It is sectional drawing explaining the manufacturing method of the concrete structure which concerns on this invention. It is a perspective view explaining the manufacturing method of the conventional concrete structure. It is sectional drawing explaining the manufacturing method of the conventional concrete structure. It is a perspective view explaining a conventional reinforcing bar spacer. It is a figure explaining the example of use of the conventional reinforcing bar spacer. It is a perspective view explaining another conventional reinforcement spacer.

Explanation of reference numerals

1 concrete structure (reinforced concrete wall)
3 Vertical Reinforcing Bar 5 Horizontal Reinforcing Bar 7 Base 9,11 Formwork 13,21,51,55,65,89,93 Reinforcing Bar Spacer 15,33,71,91 Spacer Body 17,19 Supporting Piece 23 Inner Ring 25 Outer Ring 27 Connecting post 29 Projecting piece 31 Inserting portion 35 Flat surface 37, 39, 53, 73, 75 Hook arm (hook member)
41, 43, 77, 79 Hook 45 Groove (recess: abutment)
47, 49 Clamping piece (clamping member)
57 First Spacer (Spacer Body)
59 2nd spacer part (spacer body)
61 Screw part 63 Screw holes 67, 69 Strip (spacer body)
81 Curved portion (concave portion: contact portion)
83 knob (spacer body)
85 Screw bar (spacer body)
87 Variable member (variable mechanism)

Claims (7)

In a reinforcing bar spacer that regulates a cover size between a reinforcing bar laid vertically and horizontally embedded in a concrete structure and the surface of the concrete structure,
A spacer body,
A pair of hook members extending at a distance from each other from the spacer body so as to be hooked on the horizontal or vertical reinforcing bar,
When the hook member is hooked on a horizontal or vertical rebar with the vertical or horizontal rebar interposed therebetween, the spacer body has a contact portion that contacts the vertical or horizontal rebar between the hook members. A reinforcing bar spacer having a cover between the contact portion and an outer end remote from the contact portion. The reinforcing bar spacer according to claim 1, wherein the contact portion provided in the spacer body is a recess into which the reinforcing bar fits. The reinforcing-bar spacer according to claim 1, wherein the spacer body has a holding member that protrudes from both sides of the abutting portion to hold the reinforcing bar in a detachable manner. The pair of hook members are rod-shaped members extending from the spacer main body, and are formed by bending the distal end side in a semicircular shape in accordance with the rebar, and the holding member is a rod-shaped member protruding from the spacer main body. The reinforcing bar spacer according to any one of claims 1 to 3, wherein the reinforcing bar spacer is formed by extending a front end side. The reinforcing bar spacer according to claim 4, wherein the pair of hook members that are folded back have their tip ends folded in opposite directions. The rebar spacer according to any one of claims 1 to 5, wherein the spacer body has a variable length between the contact portion and an outer end. A process of combining and fixing reinforcing bars vertically and horizontally,
A spacer body, and a pair of hook members extending from the spacer body at intervals from each other so as to be hooked on the horizontal or vertical reinforcing bar, and a contact portion that contacts the reinforcing bar between the hook members is provided. A step of preparing a reinforcing-bar spacer having a spacer main body and having a covering dimension between the reinforcing bar and the surface of the concrete structure in the reinforced concrete structure between the abutting portion and the outer end far from the spacer body; ,
The hook member is hooked on the horizontal or vertical rebar with the vertical or horizontal rebar interposed therebetween, and the contact portion is brought into contact with the vertical or horizontal rebar, and the plurality of rebar spacers are attached to the rebar. Process and
Providing a mold so as to contact the outer end surfaces of the plurality of reinforcing bar spacers;
Driving concrete into the inside of the formwork and burying the rebar,
A method for producing a concrete structure, comprising:

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