JP2008263780A - Buried concrete arrangement, wiring box, and bar material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buried concrete arrangement capable of fixedly mounting a bar member to a buried concrete arrangement, and easily performing mounting operation of the bar member to the buried concrete arrangement, and to provide a wiring box and the bar member. <P>SOLUTION: The buried concrete arrangement 10 includes the bar member 11 bendable in the three-dimensional direction by hand, and the wiring box 13 equipped with a bar-member inserter which can insert the bar member 11. A fitting protrusion 11a is formed in the bar member 11, an insertion hole 20 is bored in the bar inserter of the wiring box 13, and a narrow groove 20a is formed therein. Therefore, the fitting protrusion 11a is fitted into the narrow groove 20a to prevent rotation along the peripheral direction of the bar member 11 inside the insertion hole 20 by inserting the bar member 11 into the insertion hole 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a concrete embedding device formed for embedding a wiring box in a concrete wall in a state in which the wiring box is supported and fixed to a reinforcing bar forming a support of a concrete wall in a building. It relates to box and bar materials.

  2. Description of the Related Art Conventionally, a concrete buried device is installed in a concrete wall in order to attach a wiring device such as an outlet to a concrete wall surface in a building. This concrete buried device is made of a metal box that supports a wiring box as a concrete buried object formed in a bottomed square box shape having an opening on the front surface, and a reinforcing bar that forms the support of the concrete wall. It is made up of bar material.

  The bar material has a circular cross section, can be freely bent and deformed in the three-dimensional direction by hand, and has a required tensile strength. Then, by attaching the bar material to the wiring box, bending both ends of the bar material to the reinforcing bar side, and fixing the bar material to the reinforcing bar, the wiring box can be supported at a desired position with respect to the reinforcing bar.

  In addition, when the wiring box is supported against the reinforcing bars, when the concrete wall forming form is pressed against the opening side end face of the wiring box, the wiring box is formed by the tensile strength of the bar material. Is pressed against. Therefore, the intrusion of concrete from the opening of the wiring box when the concrete is placed between the molds is prevented. Further, the wiring box is supported on the reinforcing bars by the bar material, so that the concrete is prevented from being tilted or displaced due to the concrete pouring pressure during concrete pouring.

  However, in the above-described conventional configuration, in order to press the wiring box against the mold frame by the bar material, the bar material must be attached to the wiring box so as not to rotate. Various methods have been proposed for non-rotatably attaching the bar material to the wiring box. The first method is to fix an attachment body formed by welding or caulking and fixing the center part of a pair of bar members to a plate member separate from the wiring box to the back surface of the bottom wall of the wiring box. To do.

  In the second method, a bar material is inserted between a pair of projecting pieces formed by cutting and raising the peripheral wall of the wiring box, and the bar material is fixed to the wiring box by caulking the projecting pieces. In the third method, a bar material is fitted into a recess formed on the side wall of the wiring box, and the bar is fixed by screwing the fixing screw into the side wall so that the bar material is sandwiched between the head and the side wall of the fixing screw. It is.

  However, in the first method, an operation of welding or caulking and fixing a bar material to a plate material, and an operation of attaching the attachment body to a wiring box are required. In the second method, an operation of inserting the bar material between the projecting pieces and an operation of caulking the projecting pieces are necessary. In the third method, an operation of fitting the bar material into the recess and an operation of screwing the fixing screw into the side wall of the wiring box are necessary. That is, in any of the first to third methods, a plurality of work steps are required to attach the bar material to the wiring box in a non-rotatable manner, and the work steps include welding, caulking, or screw tightening operations. A complicated process was included. As a result, there is a problem that it is very troublesome to perform the operation of attaching the bar material to each of a large number of wiring boxes at the construction site so as not to rotate.

  The present invention provides a concrete buried device, a wiring box, and a bar material that can be attached to a concrete buried object in a non-rotatable manner and that can be easily attached to the concrete buried object. It is to provide.

  In order to solve the above-mentioned problems, the invention according to claim 1 includes: a bar material that can be bent in a three-dimensional direction by hand; and a concrete embedded object that includes a bar material insertion portion through which the bar material can be inserted. The bar material is inserted into the bar material insertion portion, and both ends of the bar material protruding from the concrete embedded object are fixed to the reinforcing bars that form the support of the concrete structure, thereby supporting the concrete embedded object to the reinforcing bars. A concrete embedded device configured to press a concrete embedded against a form erected for forming a concrete structure by a tensile strength of the bar material, wherein the bar material is the same as the bar material insertion portion. Rotation prevention means for preventing rotation of the bar material in the circumferential direction in the bar material insertion portion in a state where the bar material is inserted from one end side of the bar material. And summarized in that formed between the.

  The gist of the invention described in claim 2 is that, in the concrete buried device according to claim 1, the rotation preventing means is formed by an uneven engagement relationship between the bar material and the bar material insertion portion. To do.

  According to a third aspect of the present invention, there is provided the concrete buried device according to the second aspect, wherein the rotation preventing means includes an engagement projecting piece projecting from a part along the length direction of the bar material, The gist is that it is formed by engagement with a narrow groove that is recessed in the material insertion portion and engageable with the engagement protrusion.

  The invention according to claim 4 is the concrete embedded apparatus according to claim 3, wherein in a state where the bar material is inserted into the bar material insertion portion, the bar material is inserted into the bar material insertion portion at a certain level or more. The gist is that the engaging surface with which the engaging protrusion engages is formed in the concrete embedded to limit.

  According to a fifth aspect of the present invention, in the concrete embedded device according to the fourth aspect of the present invention, the insertion of the bar material into the bar material insertion portion is restricted by the engagement between the engagement protrusion and the engagement surface. In this state, the gist is that the positions of the engaging protrusions in the length direction of the bar material are set so that the protruding lengths of both ends of the bar material protruding from the concrete embedded object are substantially the same.

The invention according to claim 6 is characterized in that, in the concrete embedded device according to any one of claims 3 to 5, the bar material is press-molded to form an engaging protrusion. .
According to a seventh aspect of the present invention, in the concrete buried device according to the first aspect, the rotation preventing means is formed by a piercing body projecting on the outer surface of the bar material biting into the inner surface of the bar material insertion portion. This is the gist.

  The invention according to claim 8 is the concrete embedded apparatus according to any one of claims 1 to 7, wherein the concrete embedded is in the shape of a bottomed box having an opening, and a wiring device is provided inside. The gist is that the wiring box is formed so as to be attachable.

  The gist of the ninth aspect of the present invention is that, in the concrete buried device according to the eighth aspect, the bar member insertion portion is formed on the bottom wall side of the opposing side walls of the wiring box.

  A tenth aspect of the present invention is the concrete embedded device according to the eighth aspect, wherein the bar material insertion portion is formed on the opening side of the wiring box on the opposite side walls of the wiring box. And

  The invention according to claim 11 is provided with a bar material insertion portion that allows a bar material that can be bent in a three-dimensional direction by hand, and the both ends of the bar material inserted into the bar material insertion portion are made of a concrete structure. A wiring box that is supported by the reinforcing bars by fixing to the reinforcing bars that form the support, and pressed against the formwork erected for forming the concrete structure by the tensile strength of the bar material, In the state where the bar material is inserted into the bar material insertion portion from one end side of the bar material, the bar material rotates in the circumferential direction in the bar material insertion portion in cooperation with the rotation preventing means provided in the bar material. The gist of the invention is that it is provided with a rotation preventing means for preventing the rotation.

  The invention according to claim 12 is formed so that it can be bent in a three-dimensional direction by hand, and is inserted into a bar material insertion portion formed in a concrete embedded object, and both end sides protruding from the concrete embedded object are concrete structures. A bar material that supports a concrete buried object by being fixed to a reinforcing bar that forms the support frame of the steel frame, and presses the concrete buried object against a formwork that is erected for the formation of a concrete structure by a tensile strength. The anti-rotation which prevents the rotation in the circumferential direction in the bar material insertion portion in cooperation with the rotation prevention means provided in the concrete embedded object in the state inserted through the bar material insertion portion from one end side. The gist is to have means.

  As described above in detail, according to the invention described in claim 1, the bar material can be attached to the concrete buried object in a non-rotatable manner, and the attachment work of the bar material to the concrete buried object can be easily performed. Can do.

According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the bar material rotation preventing means can be easily formed.
According to the invention described in claim 3, in addition to the effect of the invention described in claim 2, it is possible to effectively prevent rotation of the bar material in the circumferential direction in the bar material insertion portion, and to prevent rotation. Can be easily formed.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, a certain amount or more of the bar material enters the bar material insertion portion by the engagement between the engagement surface and the engagement protrusion. It is possible to prevent both ends of the bar material from protruding from the concrete buried object. Therefore, the trouble that one end or the other end of the bar material enters the bar material insertion portion can be eliminated.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 4, the protruding length of the bar material is set so that the concrete embedded object is located at the center along the length direction of the bar material. The adjustment work can be omitted, and the work of supporting the concrete buried object on the rebar can be quickly performed.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 3 to 5, unlike the case where the engaging protrusion is formed as a separate member on the bar material, the concrete Simplification of the work of supporting the buried object on the reinforcing bar can be achieved.

According to the invention described in claim 7, in addition to the effect of the invention described in claim 1, the rotation preventing means can be easily formed.
According to the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1-7, the wiring box is inclined or misaligned due to the rotation of the bar material due to the concrete placement. Thus, the wiring box can be embedded in a desired position of the concrete wall, and the wiring device attached to the wiring box can be attached to the desired position of the concrete wall.

  According to the invention of claim 9, in addition to the effect of the invention of claim 8, the bottom wall side of each side wall of the wiring box can be reinforced by the bar material inserted into the bar material insertion portion. The side wall and the bottom wall can be prevented from being deformed by the concrete placing pressure.

  According to the invention of claim 10, in addition to the effect of the invention of claim 8, the opening side in each side wall of the wiring box can be reinforced by the bar material inserted into the bar material insertion portion, It is possible to prevent the opening side of the wiring box from being deformed by the concrete placing pressure.

According to the eleventh aspect of the invention, the bar member can be attached in a non-rotatable manner, and the attaching operation can be easily performed.
According to the twelfth aspect of the invention, it can be attached to the concrete buried object in a non-rotatable manner, and the attaching operation can be easily performed.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of a concrete buried device, a wiring box, and a bar material embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a concrete embedment apparatus 10 is a concrete burial provided with a bar material 11 made of a metal bar that can be bent in a three-dimensional direction by a hand, and a bar material insertion portion 12 through which the bar material 11 can be inserted. The wiring box 13 is a thing. And the rotation prevention means which prevents the rotation of the bar material 11 in the circumferential direction in the bar material insertion portion 12 in a state where the bar material 11 is inserted into the bar material insertion portion 12 is a bar material 11 and a wiring box 13. It is formed between.

  First, the wiring box 13 will be described. The wiring box 13 made of a synthetic resin material is a bottomed square box having an opening on the front surface from a bottom wall 14 and a side wall 15 standing on the periphery of the bottom wall 14. The box body 16 is formed in a shape. The upper and lower side walls 15 are provided with mounting holes 17 for mounting a wiring device, a wiring device holding frame, or a box cover (both not shown). Each side wall 15 is formed with two knocks 18 that allow wiring and piping to be inserted.

  As shown in FIGS. 1 and 2, bar material insertion portions 12 extending in the vertical direction of the left and right side walls 15 are formed at positions straddling the inner surfaces of the left and right side walls 15 facing each other and the left and right side edges of the bottom wall 14. ing. As shown in FIGS. 3 and 4, the box body 16 has an insertion hole that extends through the bar member insertion portion 12 from a position where the upper and lower side walls 15 face each other and extends along the vertical direction of the left and right side walls 15. 20 is formed, and the bar member 11 can be inserted into the insertion hole 20.

  In the bar member insertion portion 12, narrow grooves 20 a forming rotation prevention means are recessed along the direction in which the insertion hole 20 extends, at opposing positions on the inner peripheral surface of each opening side of the insertion hole 20. Has been. An engaging surface that restricts the bar material 11 from being inserted into the bar material insertion portion 12 at a certain level in a step portion formed in a portion continuous from the inner peripheral surface of each of the narrow grooves 20 a to the inner peripheral surface of the insertion hole 20. 20b is formed.

  As shown in FIGS. 4 and 5, long holes 21 extending along the insertion holes 20 are formed on the left and right side walls 15 of the bottom wall 14. The long holes 21 communicate with the insertion holes 20. . Further, insertion holes 22 extending from the long holes 21 to the left and right side walls 15 are formed on the left and right side walls 15 of the bottom wall 14, and the insertion holes 22 communicate with the insertion holes 20.

  Next, the bar member 11 will be described. As shown in FIGS. 5 and 6A and 6B, the bar member 11 made of a metal bar is formed to extend in a substantially circular cross section. On one end side of the bar material 11, an engagement protrusion 11 a formed in a disk shape by press-molding the bar material 11 along its length direction is provided as a rotation preventing means. The engaging protrusions 11 a protrude outward from the outer surfaces facing each other in the radial direction of the bar member 11 so that their tips are separated from each other. Moreover, the thickness of the engagement protrusion 11a is formed thinner than the portion of the bar member 11 having a circular cross section.

  The bar material 11 is formed so as to be inserted into the bar material insertion portion 12 by being inserted into the insertion hole 20 from the other end side. As shown by the broken line in FIG. 5 and FIG. 6B, in the state where the bar member 11 is inserted into the insertion hole 20, the engagement protrusion 11a is inserted into the narrow groove 20a and the engagement protrusion The anti-rotation means for preventing the rotation of the bar member 11 in the insertion hole 20 in the circumferential direction is formed by the engagement of the concave and convex portions 11a and the narrow groove 20a.

  In the state where the rotation preventing means is formed, the engaging protrusion 11a is formed to be engageable with the engaging surface 20b. In the engaged state, one end side and the other end side of the bar member 11 protrude from the upper and lower side walls 15 to the outside of the box body 16, and the length of the bar member 11 is such that the protruding lengths thereof are substantially the same. The position of the engaging protrusion 11a in the direction is set.

  Further, as shown in FIG. 7, both ends of the bar member 11 protruding from the box body 16 are bound and fixed to the reinforcing bars 24 that form the skeleton of the concrete wall as a concrete structure by the binding wire 25 or the like, The bar material 11 is constructed on the rebar 24. And by installing the bar material 11 to the reinforcing bar 24, the wiring box 13 can be supported by the reinforcing bar 24, and the concrete buried device 10 including the wiring box 13 and the bar material 11 is configured. .

  Further, when the wiring box 13 is supported with respect to the reinforcing bars 24 and the concrete wall forming form 23 is erected so as to press against the opening side end face of the wiring box 13, the strength of the bar material 11 increases the wiring strength. The box 13 is configured to be pressed against the surface of the mold 23.

Next, the usage method of the concrete buried device 10 having the above-described configuration will be described together with the operation.
First, as shown in FIG. 5 and FIG. 6A, the pair of bar members 11 are respectively inserted into the insertion holes 20 from the other end side, and the bar member 11 is inserted into the bar member insertion portion 12 to be engaged. The protruding piece 11a is inserted into the narrow groove 20a and engaged with the engaging surface 20b.

  Then, as shown in FIG. 6B, in the inserted state, in the pair of narrow grooves 20a, the rotation preventing means is formed by the engagement between the inner surfaces of the respective narrow grooves 20a and the corresponding engaging protrusions 11a. The entire material 11 is prevented from rotating in the circumferential direction. Further, as shown in FIG. 5, the engagement of the engagement protrusion 11 a with the engagement surface 20 b restricts the entry of the bar member 11 into the insertion hole 20 on the other end side, and the box main body 16 is predetermined. The bar material 11 is temporarily fixed at the position, and both end sides of the bar material 11 are arranged so as to protrude from the wiring box 13.

  Further, since the length of the bar member 11 protruding from the upper and lower side walls 15 is substantially the same, the wiring box 13 is positioned at the center in the length direction of the bar member 11 without adjusting the protruding length. Can be made. Subsequently, as shown in FIG. 7, both end portions of the bar member 11 are bent from the positions protruding from the upper and lower side walls 15 toward the reinforcing bar 24, and the both end portions of the bar member 11 are bound by the bind wire 25 along the reinforcing bar 24. To do.

  At this time, the entire engaging protrusion 11a having a disc shape is inserted into the bar member insertion portion 12, and both end sides of the bar member 11 protruding from the upper and lower side walls 15 are circular sections. And the movement to the up-down direction of the box main body 16 of the bar material 11 is controlled by bending from the cross-sectional circular part in the bar material 11. FIG. As a result, the wiring box 13 is supported by the reinforcing bars 24 and the concrete buried device 10 is configured.

  Now, in the state in which the concrete buried device 10 is configured, a pair of molds 23 are erected so as to sandwich the wiring box 13, and one mold 23 is brought into contact with the opening side end surface of the wiring box 13. Further, the wiring box 13 is pressed toward the reinforcing bar 24 by the mold 23.

  Then, the bar member 11 is bent and deformed by applying a force in a direction in which the distance to the reinforcing bar 24 is shortened, and the wiring box 13 is retracted in the reinforcing bar 24 direction, and the wiring box 13 is moved to the reinforcing bar by the elastic force of the bar member 11. Press in 24 directions. As a result, the opening side end face of the wiring box 13 is brought into close contact with the mold 23. At this time, since the engaging protrusion 11a and the narrow groove 20a are engaged, the bar member 11 is prevented from rotating in the circumferential direction by the pressing, and the bar member 11 is rotated by the pressing of the mold 23. Without being closed, the close state of the wiring box 13 to the mold 23 is maintained.

  Subsequently, concrete is placed between the pair of molds 23. At this time, since the bar member 11 is not rotatable due to the engagement between the engaging protrusion 11a and the narrow groove 20a, the bar member 11 is prevented from rotating by the concrete placing pressure, and the rotation of the bar member 11 is prevented. The positional deviation and the inclination of the wiring box 13 accompanying this are prevented. Moreover, since the opening side end surface of the wiring box 13 is in close contact with the mold 23, a problem that the concrete enters the wiring box 13 from the opening is prevented.

  Further, since the bar material 11 is inserted along the left and right side edges of the bottom wall 14 and the left and right side walls 15 of the box body 16, the left and right side edges and the left and right side walls of the bottom wall 14 are inserted by the bar material 11. 15 is reinforced to give the required rigidity. Therefore, the problem that the bottom wall 14 and the left and right side walls 15 of the box body 16 are deformed by the concrete placing pressure is prevented.

  Furthermore, the problem that the wiring box 13 is moved along the bar material 11 by the driving pressure due to the engagement of the engagement protrusion 11a with the engagement surface 20b and the bending of the bar material 11 is also prevented. Then, after the concrete is hardened, the concrete wall is constructed by removing the formwork 23, and the wiring box 13 is embedded in the concrete wall.

According to the above embodiment, the following features can be obtained.
(1) The engaging protrusion 11 a is formed on the bar member 11, and the narrow groove 20 a is formed in the insertion hole 20 of the wiring box 13. Therefore, by inserting the bar material 11 into the insertion hole 20, the engagement protrusion 11 a is engaged with the narrow groove 20 a and rotation of the bar material 11 in the insertion hole 20 along the circumferential direction is prevented. As a result, in order to attach the bar 11 to the wiring box 13 in a non-rotatable manner, a plurality of work processes are required, and the work process includes a complicated process such as welding, caulking, or screw tightening. In contrast, the work of attaching the bar material 11 to the wiring box 13 can be easily performed. Therefore, the work of attaching the bar material 11 to a large amount of the wiring box 13 can be quickly performed at the construction site.

  (2) The engaging protrusions 11 a protrude outward from the bar material 11 in the radial direction of the bar member 11, and the narrow grooves 20 a are formed at positions of the insertion hole 20 that are opposite to each other. Therefore, when concrete placement pressure or the like acts on the bar member 11, the placement pressure is supported substantially equally by the corresponding narrow grooves 20a from the respective engagement protrusions 11a. Therefore, the rotation of the bar member 11 can be effectively prevented as compared with the case where the engaging protrusion 11a and the narrow groove 20a are formed at one place or at a non-opposing position.

  (3) The engagement of the engaging protrusion 11a protruding from the bar member 11 with the narrow groove 20a recessed in the insertion hole 20 allows the rotation of the bar member 11 in the insertion hole 20 in the circumferential direction. It can be effectively prevented. Moreover, since the engagement protrusion 11a formed by press-molding the bar material 11 and the narrow groove 20a formed at the time of molding the bar material insertion portion 12, a means for preventing rotation of the bar material 11 is formed. The rotation preventing means can be easily formed.

  (4) The engagement between the engagement surface 20b and the engagement protrusion 11a prevents the bar material 11 from entering the bar material insertion portion 12 more than a certain amount, and the both ends of the bar material 11 are respectively connected to the wiring boxes. 13 can be projected. Therefore, one end or the other end of the bar member 11 enters the bar member insertion portion 12, and it is possible to eliminate the need to perform an operation of projecting the both end sides of the bar member 11 from the wiring box 13.

  (5) The bar member 11 can be temporarily fixed to the wiring box 13 in a state where the bar member 11 cannot be rotated by the engagement between the engagement surface 20b and the engagement protrusion 11a. Therefore, the bar material 11, that is, the reinforcing bar of the wiring box 13, is compared with the case where the bar material 11 is temporarily attached to the wiring box 13 by hand or an adhesive tape and the bar material 11 is attached to the reinforcing bar 24. The attachment work to 24 can be simplified.

  (6) When the engaging protrusion 11a is engaged with the engaging surface 20b, the position of the engaging protrusion 11a is set so that the protruding lengths at both ends of the bar member 11 are substantially the same. Therefore, the wiring box 13 can be supported by the reinforcing bar 24 without adjusting the protruding lengths of the bar material 11 and positioning the wiring box 13 at the center in the length direction of the bar material 11. .

  (7) The engaging protrusion 11a is formed in advance by press-molding the bar material 11. Therefore, unlike the case where the engaging protrusion 11a is formed as a separate member on the bar member 11, the work of supporting the wiring box 13 on the reinforcing bar 24 can be simplified.

  (8) The engagement of the engaging protrusion 11a and the narrow groove 20a can prevent the bar material 11 from rotating in the insertion hole 20 by placing concrete. Therefore, it is possible to prevent the wiring box 13 from being inclined or misaligned due to the rotation of the bar material 11 due to the concrete placement. Therefore, the wiring box 13 can be embedded at a desired position on the concrete wall, and a wiring device attached to the wiring box 13 can be attached at a desired position on the concrete wall.

  (9) Since the bar material insertion portion 12 is formed along the vertical direction of the left and right side walls 15, the bottom wall 14 and the left and right side walls 15 are inserted by inserting the bar material 11 into the bar material insertion portion 12. Can be reinforced. Therefore, it is possible to prevent the bottom wall 14 and the left and right side walls 15 from being deformed by the concrete placing pressure.

  (10) When the bar material 11 is inserted into the bar material insertion portion 12, the entire engaging projection piece 11a is inserted into the bar material insertion portion 12, and each end side of the bar material 11 is moved up and down from the engagement projection piece 11a. Projecting from the side wall 15. Therefore, both end sides of the bar member 11 protruding from the wiring box 13 are circular sections. Therefore, the bar material 11 is bent from the circular section, and the bar material 11 can be easily bent in an arbitrary direction as compared with the case where the bar material 11 is bent from the disk-shaped engaging protrusion 11a. The work of fixing to 24 can be easily performed.

In addition, you may change the said embodiment as follows.
-It is good also as the concrete buried object apparatus 10 provided with the box 13 for wiring shown in FIG. Bar material insertion portions 12 project outwardly from the upper and lower outer surfaces of the left and right side walls 15 of the wiring box 13, and the bar material insertion portions 12 that oppose each other in the vertical direction have insertion holes at opposite positions. 20 is formed. Further, a narrow groove 20a and an engaging surface 20b are formed in each bar material insertion portion 12 respectively. Then, the bar material 11 may be inserted into the upper and lower insertion holes 20, and the engaging protrusions 11 a may be engaged with the narrow grooves 20 a to form the concrete buried device 10. At this time, the central portion of the bar material 11 is exposed.

  -It is good also as the concrete buried object apparatus 10 provided with the box 13 for wiring shown in FIG. 9, a narrow groove 20a is formed in the bar member insertion portion 12 of the wiring box 13 along the entire extending direction of the insertion hole 20, and the engagement surface 20b is omitted. Yes. On the other hand, an engaging protrusion 11a is formed at the center of the bar member 11 along the length direction of the bar member 11 so as to correspond to the length of the narrow groove 20a. Then, when the bar member 11 is inserted into the insertion hole 20, the engagement protrusion 11 a and the narrow groove 20 a are engaged along the entire length of the bar member insertion part 12, and the engagement causes the engagement in the insertion hole 20. The rotation of the bar material 11 can be reliably prevented. At this time, it is possible to prevent the bar material 11 from coming off from the bar material insertion portion 12 by bending the protruding bar material 11.

  -As shown in FIG. 10, you may make it prevent the fall of the bar material 11 from the bar material insertion part 12 by bending the center part of the bar material 11. As shown in FIG. That is, the tip of the driver is inserted into the insertion hole 20 from the insertion hole 22, the bar material 11 inserted into the insertion hole 20 is bent in the direction of the long hole 21, and a part of the bar material 11 is inserted into the long hole 21. Position to. When configured in this way, the bent bar material 11 comes into contact with the inner peripheral surface of the long hole 21 to prevent rotation of the bar material 11 in the insertion hole 20 and movement along the length direction. it can.

  In the embodiment, the bar material insertion portion 12 is formed on the bottom wall 14 side. However, the bar material insertion portion 12 may be formed on the opening side end portion of the box body 16 on the upper and lower or left and right side walls 15 facing each other. . When configured in this way, the opening side of the box body 16 in the upper and lower or left and right side walls 15 can be reinforced by the bar material 11. Therefore, the strength of the opening side of the box body 16 can be improved, and deformation due to concrete placing pressure or the like can be prevented.

  In the embodiment, the concrete buried device 10 is formed by the wiring box 13 and the bar material 11, but may be modified as follows. That is, as shown in FIG. 11, at least the insertion hole 20 and the narrow groove 20a are formed in the box cover 26 as a concrete buried object, and the bar material 11 is inserted into the insertion hole 20 to form the concrete buried device 10. May be. When configured in this way, the box cover 26 is attached to the wiring box 13, and the bar material 11 inserted in the box cover 26 so as not to rotate is attached to the reinforcing bar 24. As a result, the wiring box 13 can be supported by the reinforcing bar 24 via the box cover 26, and the engagement between the engaging protrusion 11a and the narrow groove 20a prevents the bar material 11 from rotating, and the wiring box. 13 movements can be prevented.

  In the embodiment, the concrete buried device 10 is formed by the wiring box 13 and the bar material 11, but may be modified as follows. That is, the concrete buried object may be embodied in a hole forming member (insert) that forms a bolt screw hole on the outer surface of a concrete structure such as a concrete wall. Or, an opening forming member (end cover) that protects an opening end portion of a protective pipe disposed in a concrete structure such as a concrete wall with a concrete buried object and forms an opening communicating with the inside of the protective pipe on the outer surface of the concrete structure. It may be embodied.

  In the embodiment, the insertion of the bar material 11 into the bar material insertion portion 12 is restricted by the engagement between the engagement protrusion 11a and the engagement surface 20b, but the following modifications may be made. . As shown in FIG. 12, the engaging protrusion 11a is press-formed in a step shape, and the engaging step portion 11b is formed in the step portion. On the other hand, as shown in FIG. 13, a wiring box 13 as a concrete embedded is formed of a box body 16 having a bottomed square box shape having an opening on the front surface, using a metal material.

  In addition, on both side portions of the upper and lower side walls 15 of the box body 16, insertion holes 20 that oppose each other in the vertical direction are formed through the side walls 15 as bar material insertion portions. As shown in FIG. 14A, each insertion hole 20 has a circular portion 20c through which a portion having a circular cross section of the bar member 11 can be inserted, and the engagement protrusion 11a can be engaged with each other. It is formed of a pair of engaging grooves 20d extending from the circular portion 20c in the diameter direction of the circular portion 20c. The engagement groove 20d is formed as a rotation preventing means for preventing the bar member 11 from rotating in the circumferential direction when the engagement protrusion 11a is engaged.

  And a pair of bar material 11 provided with the above-mentioned engagement step part 11b is inserted in insertion hole 20 from the other end side, respectively, and engagement protrusion 11a is inserted into engagement groove 20d and engaged. The engaging step portion 11b is engaged with the outer surface of the upper side wall 15 which is the opening peripheral portion of the insertion hole 20 as the bar material insertion portion. Then, as shown in FIG. 14A, in the inserted state, in the pair of engaging grooves 20d, the rotation preventing means is formed by the engagement between the inner surface of each engaging groove 20d and the corresponding engaging protrusion 11a. The rotation of the entire bar member 11 in the circumferential direction is prevented.

  Moreover, as shown in FIG.14 (b), more than fixed entry into the insertion hole 20 of the other end side of the bar | burr material 11 is controlled by engagement with the outer surface of the upper side wall 15 of the engagement step part 11b. That is, the bar member 11 is temporarily fixed at a predetermined position of the box body 16 and the both end sides of the bar member 11 are arranged so as to protrude from the wiring box 13.

  In a state where the engagement step portion 11b is engaged with the outer surface of the side wall 15, one end side and the other end side of the bar member 11 protrude from the upper and lower side walls 15 to the outside of the box body 16, and the length of both protrusions is approximately. The positions of the engaging protrusions 11a in the length direction of the bar member 11 are set so as to be the same. Moreover, the concrete embedded object apparatus 10 is comprised from the bar material 11 in which the engagement step part 11b was formed, the wiring box 13 of the embodiment, the wiring box 13 shown in FIGS. 8 to 10 and the box cover 26 shown in FIG. May be formed.

  In the above description, the engaging step portion 11b is engaged with the outer surface of the upper side wall 15, but may be changed as follows. For example, both side portions of the upper and lower side walls 15 are respectively recessed on the back side to form a recess as a bar material insertion portion, and the insertion hole 20, the circular portion 20c, and the engagement groove 20d are formed on the inner bottom surface of the recess. To do. When the bar member 11 is inserted into the insertion hole 20, the entire engagement protrusion 11a is inserted into the recess, and the engagement step 11b is engaged with the opening peripheral edge of the insertion hole 20 on the inner bottom surface of the recess. You may let them.

  In this case, since the entire engaging protrusion 11a is inserted into the recess, each end portion side of the bar member 11 protrudes from the upper and lower side walls 15 from the engaging protrusion 11a. Therefore, the bar material 11 is bent from the circular section, and the bar material 11 can be easily bent in an arbitrary direction as compared with the case where the bar material 11 is bent from the disk-shaped engaging protrusion 11a. The work of fixing to 24 can be easily performed.

  The bar member 11 is press-molded to form the engaging protrusion 11a or the engaging protrusion 11a provided with the engaging step portion 11b, but at least another member capable of forming the engaging protrusion 11a is used as the bar member 11. You may attach to. Alternatively, the mold for forming the bar material 11 may be formed so that at least the engagement protrusion 11 a can be formed, and at least the engagement protrusion 11 a may be formed simultaneously with the formation of the bar material 11.

  -When the bar material 11 is inserted into the bar material insertion portion 12, the position of the engagement protrusion 11a or the engagement step portion 11b is set so that the protrusion length of the bar material 11 from the upper and lower side walls 15 is substantially the same. However, you may form the engagement protrusion 11a or the engagement step part 11b in the position where the said protrusion length does not become substantially the same.

The bar material insertion portion 12 may be formed at a position straddling the inner surfaces of the upper and lower side walls 15 and the upper and lower side edges of the bottom wall 14, and at least the insertion holes 20 and the narrow grooves 20 a may be formed in the bar material insertion portion 12.
A bar member insertion portion 12 extending in the length direction of each of the upper and lower or left and right side walls 15 is formed between the bottom wall 14 of each of the upper and lower or left and right side walls 15 and the opening side end of the box body 16, and the bar material is inserted. At least the insertion hole 20 and the narrow groove 20a may be formed in the portion 12.

  In the embodiment, the engagement protrusions 11a are engaged with the engagement surface 20b, thereby restricting the insertion of the bar member 11 into the insertion hole 20 more than a certain amount, but the engagement surface 20b is omitted, When the bar member 11 is inserted into the insertion hole 20, a restricting protrusion that restricts a predetermined insertion of the bar member 11 into the insertion hole 20 may be formed on the upper side of the engaging protrusion 11 a. When configured in this manner, the bar member 11 is inserted into the insertion hole 20, and in a state where the engaging protrusion 11 a is engaged with the narrow groove 20 a, the limiting protrusion engages with the upper side wall 15 and the bar member 11. It is possible to limit the insertion into the insertion hole 20 beyond a certain level.

  In the embodiment, the bar material insertion portions 12 are formed at two locations, and the wiring box 13 is supported by the two bar materials 11, but the bar material insertion portions 12 are formed at three or more locations, and three or more The wiring box 13 may be supported by the bar material 11.

  In the embodiment, the engaging protrusion 11a is formed so as to protrude from the position in the radial direction of the bar member 11 and the narrow groove 20a is formed at the position in the insertion hole 20 facing each other. It may be changed. For example, the engaging protrusion 11a is formed so as to protrude outward from the non-opposing position in the radial direction of the bar member 11, and the non-facing position of the insertion hole 20 so that the narrow groove 20a corresponds to the engaging protruding piece 11a. You may form in.

  In the embodiment, the engaging protrusion 11a is formed so as to protrude in two places, and the narrow groove 20a is formed in two places. However, the bar is provided so that the engaging protrusion 11a protrudes in one place or three places or more. The material 11 may be formed, and one or three or more narrow grooves 20a may be formed corresponding to the engaging protrusions 11a.

  In the embodiment, the rotation preventing means is formed by the engagement between the engaging protrusion 11 a protruding from the bar member 11 and the narrow groove 20 a recessed in the insertion hole 20, but the inner periphery of the insertion hole 20 A pair of engaging projections as anti-rotation means are provided to project at opposite positions on the surface. Then, when the bar member 11 is inserted into the insertion hole 20, the engaging protrusions 11 a protruding opposite to each other are inserted between the pair of engaging protrusions. As a result, the engagement protrusion 11a engages with the engagement protrusion to form a rotation preventing means, and the rotation of the bar member 11 in the circumferential direction in the insertion hole 20 can be prevented.

  In the embodiment, the rotation preventing means is formed by the engaging protrusion 11a protruding from the bar member 11 and the narrow groove 20a recessed in the insertion hole 20, but the engaging protrusion 11a is omitted. An engagement groove serving as a rotation preventing means is provided in at least one position along the length direction of the bar member 11. On the other hand, an engagement protrusion that protrudes inward of the insertion hole 20 is formed on the inner peripheral surface of the insertion hole 20 as rotation preventing means. When the bar member 11 is inserted into the insertion hole 20, the engaging protrusion is engaged with the engaging groove of the bar member 11. As a result, the rotation preventing means is formed by the engagement between the engagement protrusion and the engagement groove, and the rotation of the bar member 11 in the circumferential direction in the insertion hole 20 can be prevented.

  In the embodiment, the rotation preventing means is formed by the engaging protrusion 11a protruding from the bar member 11 and the narrow groove 20a recessed in the insertion hole 20, but the engaging protrusion 11a is omitted. Then, a piercing body projects from the outer surface of one end side of the bar material 11. On the other hand, the narrow groove 20a of the insertion hole 20 is omitted, and the inner surface of the insertion hole 20 is used as an anti-rotation means. When the bar material 11 is inserted into the insertion hole 20, the piercing body is bitten into the inner surface of the insertion hole 20. As a result, rotation preventing means is formed by biting the piercing body into the inner surface of the insertion hole 20, and rotation of the bar member 11 in the circumferential direction in the insertion hole 20 can be prevented. Further, since the narrow groove 20a can be omitted, the rotation preventing means can be easily formed as compared with the case where the rotation preventing means is formed by the engagement between the engaging protrusion 11a and the narrow groove 20a.

  In the embodiment, the other end side of the bar member 11 is inserted into the insertion hole 20 from above the wiring box 13, and the engaging protrusion 11a is inserted from above the narrow groove 20a. Is engaged with the engagement surface 20b, but may be changed as follows. That is, the other end of the bar member 11 is inserted into the insertion hole 20 from below the wiring box 13, and the engaging protrusion 11 a is inserted from below the narrow groove 20 a formed on the lower side of the wiring box 13. The upper surface of the engagement protrusion 11a may be engaged with the engagement surface 20b. In this case, when the bar member 11 is fixed to the reinforcing bar 24, the engagement surface 20b engages with the upper surface of the engagement protrusion 11a, and the engagement causes the wiring box 13 to move downward. Can be prevented.

  In the embodiment, the concrete embedded device 10 is embedded in the concrete wall as a concrete structure. However, the concrete embedded device 10 may be embedded in a concrete pillar, a concrete floor, or the like as the concrete structure.

Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
The engaging protrusions protrude outward from the outer surfaces facing each other in the radial direction of the bar member so as to be separated from each other. Concrete buried equipment. When comprised in this way, when concrete placement pressure etc. act on a bar material, the placement pressure is supported by the corresponding narrow groove from each engagement protrusion piece substantially equally. Therefore, the rotation of the bar member can be effectively prevented as compared with the case where the engagement protrusion is formed at one place or at a non-opposing position.

  The engagement protrusion is inserted into a bar material insertion portion, and an end portion side of the bar material protrudes from the concrete embedded object with respect to the engagement protrusion. Concrete embedded equipment according to item. When comprised in this way, each edge part side of a bar material protrudes from a concrete embedding thing from an engagement protrusion. Therefore, compared with the case where the bar material is bent from the engagement protrusion, the bar material can be bent in an arbitrary direction, and the work of fixing the bar material to the reinforcing bar can be easily performed.

The perspective view which shows the concrete embedment apparatus of embodiment. The front view which shows the box for wiring of embodiment. The top view which shows the box for wiring of embodiment. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. The rear view which shows the state which penetrated the bar material in the box for wiring of embodiment. (A) is a disassembled perspective view of the state which penetrates the bar material in the wiring box of embodiment, (b) is a partial top view which shows the bar material inserted in the insertion hole. The sectional side view which shows the concrete embedment apparatus arrange | positioned between the molds. The perspective view which shows the concrete embedment apparatus of another example. The disassembled perspective view which shows the concrete embedded object apparatus of another example. The perspective view which shows the usage method of the concrete embedment apparatus of another example. The perspective view which shows the box cover as a concrete buried object. The fragmentary perspective view which shows the engagement protrusion and engagement step part of the bar material of another example. The perspective view which shows the concrete embedment apparatus of another example. (A) is a fragmentary sectional plan view which shows the state which inserted the bar material of another example in the penetration hole, (b) is a fragmentary sectional side view which shows engagement with an engaging step part and the outer surface of an upper side wall.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Concrete buried object apparatus, 11 ... Bar material, 11a ... Engagement protrusion which forms rotation prevention means, 11b ... Engagement step part, 12 ... Bar material insertion part, 13 ... Box for wiring as concrete buried object, DESCRIPTION OF SYMBOLS 14 ... Bottom wall, 15 ... Side wall, 20a ... Narrow groove which forms rotation prevention means, 20b ... Engagement surface, 23 ... Formwork, 24 ... Reinforcement, 26 ... Box cover as concrete embedded object.

Claims (12)

It consists of a bar material that can be bent in a three-dimensional direction by hand, and a concrete embedded object that has a bar material insertion part through which the bar material can be inserted, and the bar material is inserted into the bar material insertion part, By fixing both ends of the protruding bar material to the reinforcing bar that forms the support of the concrete structure, the reinforcing bar supports the concrete buried object, and the mold is erected to form the concrete structure by the tensile strength of the bar material. A concrete buried device configured to press a concrete buried object against a frame,
In the state where the bar material is inserted into the bar material insertion portion from one end side of the bar material, a rotation preventing means for preventing rotation of the bar material in the circumferential direction in the bar material insertion portion is provided as a bar material and a concrete embedded object. A concrete embedded device characterized by being formed between the two. The concrete embedded device according to claim 1, wherein the rotation preventing means is formed by an uneven engagement relationship between the bar material and the bar material insertion portion. The rotation preventing means includes an engaging protrusion protruding from a part along the length direction of the bar member, and a narrow groove recessed in the bar member insertion portion and engageable with the engaging protrusion. The concrete buried device according to claim 2, wherein the concrete buried device is formed by engagement of the two. In a state where the bar material is inserted into the bar material insertion portion, an engagement surface with which the engagement protrusion is engaged is formed in the concrete embedded to limit the insertion of the bar material into the bar material insertion portion beyond a certain level. The concrete buried device according to claim 3, wherein the concrete buried device is provided. In a state where a certain amount or more of the bar material is inserted into the bar material insertion portion by the engagement between the engagement protrusion and the engagement surface, the protruding lengths of both ends of the bar material protruding from the concrete embedded object are 5. The concrete embedded device according to claim 4, wherein the position of the engaging protrusion in the length direction of the bar material is set to be substantially the same. The concrete embedded device according to any one of claims 3 to 5, wherein the bar material is press-molded to form an engagement protrusion. The concrete embedding apparatus according to claim 1, wherein the rotation preventing means is formed by a piercing body protruding from an outer surface of a bar material biting into an inner surface of the bar material insertion portion. The concrete embedment device according to any one of claims 1 to 7, wherein the concrete embedment has a bottomed box shape having an opening, and is a wiring box formed so that a wiring device can be attached therein. . The concrete embedded device according to claim 8, wherein the bar member insertion portion is formed on the bottom wall side of the opposing side walls of the wiring box. The concrete embedded device according to claim 8, wherein the bar member insertion portion is formed on an opening side of the wiring box on opposite side walls of the wiring box. It is equipped with a bar material insertion part that allows a bar material that can be bent in three dimensions by hand, and both ends of the bar material inserted into the bar material insertion part are fixed to the reinforcing bars that form the support of the concrete structure. Is a wiring box that is supported by the reinforcing bar and pressed against the formwork erected for forming the concrete structure by the tensile strength of the bar material, and the bar material is inserted into the bar material insertion portion. Rotation prevention means for preventing rotation of the bar material in the circumferential direction in the bar material insertion portion in cooperation with the rotation prevention means provided on the bar material in a state of being inserted from one end side of the bar material. A wiring box characterized by having It is formed so that it can be bent in three dimensions by hand, and is inserted into the bar material insertion part formed in the concrete buried object, and both ends projecting from the concrete buried object are fixed to the reinforcing bars forming the support frame of the concrete structure. A bar material for supporting the concrete embedment by the reinforcing bars and pressing the concrete embedment against a mold erected for forming a concrete structure by a tensile strength, the bar material insertion portion It is characterized by comprising anti-rotation means for preventing rotation in the circumferential direction in the bar material insertion portion in cooperation with the anti-rotation means provided in the concrete buried object in a state of being inserted from one end side. Bar material to be used.

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