JP4621225B2 - Concrete buried device provided with bar material for supporting concrete buried material - Google Patents

Description

The present invention, in order to bury the wiring box in the concrete wall of the building, with a concrete buried objects supporting bar member for supporting the wiring box rebar forming the支骨concrete wall Concrete The present invention relates to an embedded device.

  2. Description of the Related Art Conventionally, in order to attach a wiring device such as an outlet to a concrete wall surface in a building, a wiring box is installed as a concrete buried object in the concrete wall. This wiring box is formed in a bottomed square box shape having an opening on the front surface, and is supported by a reinforcing bar forming a support frame of a concrete wall by a bar material.

  The bar material is formed from a bar material body made of a metal bar having a circular cross section, and can be bent and deformed freely in a 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.

  When the wiring box is supported on the reinforcing bar by the bar material, the bar material is fixed to the reinforcing bar by binding each end of the bar material and the reinforcing bar with a binding wire. At this time, if the protruding lengths of the both end portions of the bar material from the wiring box are different, it is difficult to perform the binding operation using the bind wires. Therefore, the mounting position of the bar material with respect to the wiring box is adjusted so that the wiring box is located substantially at the center of the bar material and the protruding length of the bar material from the wiring box is substantially the same.

  Various methods have been proposed for attaching the bar material to the wiring box so that the protruding lengths from the wiring box on both ends of the bar material are substantially the same. In the first method, an attachment body formed by welding or caulking and fixing a central portion of a pair of bar members to a plate member separate from the wiring box is arranged at the center of the back surface of the bottom wall of the wiring box. It is fixed to the part.

  In the second method, a bar material is inserted between a pair of protruding pieces formed by cutting and raising the peripheral wall of the wiring box so that the protruding lengths from the wiring box on both ends of the bar material are substantially the same. After the adjustment, the bar is attached to the wiring box by caulking the protruding piece. In the third method, the bar material is fitted into the recess formed in the side wall of the wiring box, and the protruding length from the wiring box on both ends of the bar material is adjusted to be substantially the same. Then, the fixing screw is screwed into the side wall and attached so that the bar material is sandwiched between the head and the side wall of the fixing screw.

  However, in the above-described conventional configuration, in any of the first to third methods, the bar material with respect to the plate material or the wiring box is arranged so that the protruding lengths from the wiring box on both ends of the bar material are substantially the same. The position must be adjusted. As a result, there is a problem that the work of attaching the bar material to the wiring box at the construction site is very troublesome.

The present invention has been made paying attention to the problems existing in the above prior art. And has as its object, Turkey Nkurito buried object for supporting can be easily attached to the concrete buried object bar material body as both ends of the length of the bar member body that protrudes from the concrete buried object is substantially the same An object of the present invention is to provide a concrete buried device having a bar material.

In order to solve the above-mentioned problems, the invention according to claim 1 is capable of inserting a concrete embedded object supporting bar material comprising a bar material body that can be bent in a three-dimensional direction, and the concrete embedded object supporting bar material. The concrete embedded object having a bar insertion hole is inserted into the pair of bar material insertion holes, and both end sides of the concrete embedded support bar member protruding from the concrete embedded object are inserted. Formwork that is erected to form concrete structures by bending the concrete reinforcements by supporting the concrete embedded objects by bending and fixing them to the reinforcing bars that form the backbone of the concrete structures. concrete buried object a concrete buried object apparatus configured to press against the engaging projections said bar Is formed only on one side of the wood body and from the other end of the bar material body to move said concrete buried objects supporting bar member in the axial direction, by inserting from one to the other of said pair of bar member insertion hole In the state where the engaging protrusion engages with the opening peripheral edge of one of the bar material insertion holes and the entry of the bar material for supporting the concrete embedded material into the bar material insertion hole is restricted, A bar material for supporting a concrete buried object, characterized in that the position of the engaging protrusion in the length direction of the bar material body is set as much as possible so that the protruding lengths of both ends of the protruding bar material body are substantially the same. This is the gist.

As described in detail above , according to the invention described in claim 1 , the bar material body can be easily made into a concrete buried object so that the lengths of both ends of the bar material body protruding from the concrete buried object are substantially the same. It is possible to provide a concrete buried device provided with a concrete buried support bar that can be attached.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a concrete buried object supporting bar material and a concrete buried object device including the concrete buried object supporting bar material embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a concrete buried device 10 includes a concrete buried support bar B that can be bent in a three-dimensional direction, and a wiring as a concrete buried that can be inserted through the concrete buried support B. And the box 13 for use.

  The concrete buried object supporting bar material B (hereinafter simply referred to as the bar material B) supports the wiring box 13 on the reinforcing bars 12 that form the skeleton of the concrete structure. The bar material B is formed from a bar material body 11 made of a metal rod having a substantially circular cross section, and is formed so as to be bendable in a three-dimensional direction by hand.

  As shown in FIG. 2, a flat plate portion 11 a is formed on one end side of the bar material body 11 by pressing the bar material body 11 in the thickness direction so as to be almost crushed into a disk shape. Since the flat plate portion 11a is crushed by the press forming, the side edge portion along the length direction of the bar material body 11 is formed so as to protrude outward from the outer peripheral surface of the circular section of the bar material body 11. ing. And the engagement protrusion piece 11b which protruded outward from the outer peripheral surface of the bar material main body 11 is formed in the both-sides edge part along the length direction of the bar material main body 11 in the flat plate part 11a.

  Further, the flat plate portion 11a is formed with a stepped portion that intersects the length direction of the bar material main body 11 and that extends continuously in a direction perpendicular to the length direction by the press molding. A stepped portion 11c is formed as an engaging projection. The engagement step portion 11c is formed on one end side of the bar body 11 in the flat plate portion 11a. Further, both side portions in the extending direction of the engagement step portion 11 c protrude outward from the outer peripheral surface of the cross-section circular portion of the bar member main body 11.

  Next, the wiring box 13 will be described. As shown in FIG. 1, the metal wiring box 13 is opened to the front by a bottom wall 14 and a side wall 15 erected on the periphery of the bottom wall 14. It consists of the box main body 16 formed in the shape of a square box with a bottom. An attachment hole 17 for attaching a wiring device, a wiring device holding frame, or a box cover (both not shown) is provided at the open ends of the box body 16 in the upper and lower side walls 15. Each side wall 15 is formed with two knocks 18 that allow wiring and piping to be inserted.

  Bar material insertion holes 20 are formed on both side portions of the upper and lower side walls 15 of the box body 16 so as to face each other in the vertical direction and allow the bar material B to be inserted therethrough. As shown in FIG. 3A, each bar member insertion hole 20 is formed with a circular portion 20 c through which the circular portion of the cross section of the bar member main body 11 can be inserted. The bar material insertion hole 20 is formed with a pair of engagement grooves 20d extending outward from the circular portion 20c along an extension line of the diameter of the circular portion 20c. In each engagement groove 20d, the engagement protrusion 11b can be inserted in a state where the circular section of the bar body 11 is inserted into the circular portion 20c.

  When the engaging protrusion 11b is inserted into the engaging groove 20d, as shown in FIG. 3B, the engaging step portion 11c is formed on the upper side wall 15 as the opening peripheral portion of the bar member insertion hole 20. Engage with the outer surface. In this engaged state, the one end side and the other end side of the bar member B protrude from the upper and lower side walls 15 to the outside of the wiring box 13, and the flat plate portions 11a so that the protruding lengths at both end sides thereof are substantially the same. And the position of the engagement step part 11c is set.

  Then, the bar material B is inserted into the bar material insertion hole 20, and the engaging step portion 11 c is engaged with the outer surface of the upper side wall 15, whereby the bar material B is attached to the wiring box 13, and the concrete buried object device 10. Is configured. In the concrete embedded device 10, the protrusion step 11 c is engaged with the peripheral edge of the opening of the bar member insertion hole 20 and protrudes from the wiring box 13. The bar material B is attached to the wiring box 13 in a state where the lengths are substantially the same.

  Further, as shown in FIG. 1, both ends of the bar member B protruding from the wiring box 13 are respectively bound and fixed to the reinforcing bars 12 that form the skeleton of the concrete wall as the concrete structure by the bind wires 25 or the like. The bar material B is constructed on the reinforcing bar 12. Then, by laying the bar material B on the reinforcing bar 12, the wiring box 13 can be supported on the reinforcing bar 12 by the concrete buried device 10.

  Further, when the wiring box 13 is supported with respect to the reinforcing bars 12, the concrete wall forming mold 23 is erected so as to be pressed against the opening side end face of the wiring box 13, so that the bar material B has a tensile strength for wiring. The box 13 is configured to be pressed against the surface of the mold 23.

Next, a method of using the concrete buried object device 10 and the concrete buried object supporting bar material B having the above-described configuration will be described together with actions.
First, when the pair of bar members B is inserted into the circular portion 20c of the bar member insertion hole 20 from the upper side of the wiring box 13 to the other end side, as shown in FIG. Each is inserted into the engaging groove 20d. Then, in the inserted state, the rotation of the bar material B in the circumferential direction is prevented by the engagement between the inner surface of each engagement groove 20d and the corresponding engagement protrusion 11b in the pair of engagement grooves 20d.

  Further, as shown in FIG. 3B, the lower surface of the engagement step portion 11c is engaged with the outer peripheral edge portion of the opening of the engagement groove 20d. At this time, as shown by a broken line in FIG. 3A, the engaging step portion 11c is formed so as to extend to a position protruding outward from the outer peripheral surface of the circular section of the bar body 11, It engages with the outer surface of the upper side wall 15 which is away from the circular portion 20c.

  The concrete embedded device 10 is formed by engagement with the outer surface of the upper side wall 15 of the engagement step portion 11c, and the entry of the bar material B into the bar material insertion hole 20 is restricted. That is, a problem that the bar material B is attached in a state where the bar material B is positioned at a predetermined position of the wiring box 13 and the bar material B falls out of the wiring box 13 is prevented.

  As shown in FIG. 4, in the state where one engagement step portion 11 c is engaged with the outer surface of the upper side wall 15, one end side and the other end side of the bar material B are respectively outward from the upper and lower side walls 15. Projecting toward each other, and both projecting lengths thereof are substantially the same. Therefore, the wiring box 13 is positioned at the center in the length direction of the bar material B without adjusting the protruding length of both ends of the bar material B.

  Subsequently, as shown in FIG. 1, both end portions of the bar member B are bent in the direction of the reinforcing bar 12 from positions protruding from the upper and lower side walls 15, and both end portions of the bar member B are bound by the bind wire 25 along the reinforcing bar 12. To do. As a result, the wiring box 13 is supported by the reinforcing bars 12. At this time, since the bar material B does not fall out of the wiring box 13, the work of fixing the bar material B to the reinforcing bar 12 is easily performed.

  Now, in a state where the wiring box 13 is supported by the reinforcing bar 12, as shown in FIG. 4, a pair of molds 23 are erected so as to sandwich the wiring box 13, and one mold 23 is connected to the wiring box. Then, the wiring box 13 is pressed toward the reinforcing bar 12 by the mold 23.

  At this time, the wiring box 13 is pressed toward the reinforcing bar 12 by the elastic force of the bar material B, and the opening side end face of the wiring box 13 is brought into close contact with the mold 23. Subsequently, concrete is placed between the pair of molds 23. At this time, since the opening side end face of the wiring box 13 is in close contact with the formwork 23, a problem that the concrete enters the wiring box 13 from the opening is 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 by the concrete embedded device 10.

According to the above embodiment, the following features can be obtained.
(1) When the engaging step portion 11c is engaged with the outer surface of the upper side wall 15, the bar material B is used for wiring so that the protruding lengths from the wiring boxes 13 on both ends of the bar material B are substantially the same. It can be attached to the box 13. Therefore, the operation | work which adjusts each protrusion length from the wiring box 13 of the bar material B can be abbreviate | omitted, and the operation | work which attaches the bar material B to the wiring box 13 can be performed easily. Moreover, since the protrusion length of the both ends of the bar material B from the wiring box 13 becomes substantially the same, the operation | work which attaches the both ends of the bar material B to the reinforcing bar 12 can be performed easily. In addition, since the wiring box 13 is supported at substantially the center of the bar material B, the wiring box 13 can be supported by the reinforcing bars 12 without being inclined.

  (2) The engagement of the bar material B into the bar material insertion hole 20 can be prevented by engagement with the outer surface of the upper wall 15 of the engagement step portion 11c. For this reason, the bar material B enters the bar material insertion hole 20, and it is possible to eliminate the need to perform an operation of projecting both end sides of the bar material B from the wiring box 13.

  (3) By inserting the bar material B into the bar material insertion hole 20, the engagement step portion 11 c is engaged with the outer surface of the upper side wall 15, and the bar material B passes through the bar material insertion hole 20 and passes through the wiring box 13. Can be prevented from falling off. Therefore, unlike the case where a plurality of complicated work steps are required to attach the bar material B in a state in which the bar material B is prevented from falling off the wiring box 13, the bar material B can be easily attached to the wiring box 13. it can.

  (4) When the engagement protrusion 11b engages with the engagement groove 20d, rotation of the bar member B in the circumferential direction of the bar member B in the bar member insertion hole 20 can be prevented. As a result, it is possible to prevent the wiring box 13 from being tilted or misaligned due to the pressing of the wiring box 13 during the installation of the mold 23 or the rotation of the bar material B due to the concrete placing pressure.

  (5) The flat plate portion 11a and the engagement step portion 11c are formed in advance by press-molding the bar material body 11. Therefore, unlike the case where the flat plate portion 11a and the engaging step portion 11c are formed as separate members on the bar material main body 11, the work of attaching the bar material B to the wiring box 13 can be simplified.

  (6) Since the engaging step portion 11c is formed by press-molding the bar material body 11, the bar material provided with means for making the protruding lengths from the wiring boxes 13 on both ends of the bar material B substantially the same. B can be formed easily.

  (7) The engagement step portion 11c is engaged at a position separated from the circular portion 20c. Further, since the engaging step portion 11 c protrudes outward from the outer peripheral surface of the circular section of the bar body 11, the area where the engaging step portion 11 c engages with the outer surface of the upper side wall 15 can be increased. The risk of the engaging step portion 11c passing through the circular portion 20c and the engaging groove 20d can be eliminated.

In addition, you may change the said embodiment as follows.
In the embodiment, the concrete buried object is embodied in the wiring box 13, but may be embodied in a box cover attached to the wiring box 13 as a concrete buried object. Moreover, you may embody concrete embedment in the hole formation member (insert) which forms the hole for bolt screwing in the outer surface of concrete structures, 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 bar main body 11 is crushed to form the flat plate portion 11a, and the engaging step portion 11c is formed on the flat plate portion 11a. However, the following modifications may be made. That is, the bar member main body 11 may be bent without being crushed, and the engaging step portion 11c may be formed in the step portion formed by the bending. At this time, the outer end portion of the engagement step portion 11 c does not protrude outward from the outer peripheral surface of the circular section of the bar body 11.

  -Although the engagement step part 11c was formed by press-molding the bar material B, the engagement step part 11c may be formed without press forming. For example, a metal material may be attached to the outer peripheral surface of the bar material main body 11 by welding or the like, and the engagement protrusion may be formed by the metal material. At this time, the outer end of the engaging protrusion may or may not protrude outward from the outer peripheral surface of the circular section of the bar body 11. Alternatively, the mold for forming the bar material B may be formed so that the engaging step portion 11c can be formed, and the engaging step portion 11c may be formed simultaneously with the forming of the bar material B.

  In the embodiment, the flat plate portion 11a is formed on the bar member main body 11, and the engaging protrusion 11b and the engaging step portion 11c are formed on the flat plate portion 11a, but the flat plate portion 11a and the engaging protrusion 11b are omitted. Thus, only the engaging step portion 11 c may be formed on the bar body 11.

  In the embodiment, the bar material insertion holes 20 are formed in two places and the wiring box 13 is supported by the two bar materials B. However, the bar material insertion holes 20 are formed in three or more places, and the three or more bar material insertion holes 20 are formed. The wiring box 13 may be supported by the bar material B.

  In the embodiment, the other end side of the bar member B is inserted from above the wiring box 13 into the bar member insertion hole 20, and the lower surface of the engagement step portion 11c is engaged with the outer surface of the upper side wall 15. You may change as follows. That is, the other end side of the bar member B may be inserted into the bar member insertion hole 20 from below the wiring box 13, and the upper surface of the other engagement step portion 11 c may be engaged with the outer surface of the lower side wall 15. When comprised in this way, when the bar material B is fixed to the reinforcing bar 12, the downward movement of the wiring box 13 can be prevented.

In the embodiment, the bar material body 11 having a circular cross section is used, but a bar material body 11 having a square cross section, a triangular cross section, or the like may be used.
In the embodiment, the wiring box 13 is embedded in the concrete wall as a concrete structure. However, the concrete structure such as the wiring box 13 may be embedded in a concrete pillar, a concrete floor, or the like as the concrete structure.

In the embodiment, the wiring box 13 is formed of a metal material, but the wiring box 13 may be formed of a synthetic resin material.
In the embodiment, the engaging step portion 11 c 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 surface side to form a recess, and the bar material insertion hole 20, the circular portion 20c, and the engagement groove 20d are formed on the inner bottom surface of the recess. When the bar material B is inserted into the bar material insertion hole 20, the entire flat plate portion 11a is inserted into the recess, and the engagement step portion 11c is engaged with the opening peripheral edge of the engagement groove 20d on the inner bottom surface of the recess. May be combined.

The perspective view which shows the state which supported the box for wiring of embodiment on the reinforcing bar. The fragmentary perspective view which shows the engagement step part of embodiment. (A) is a partial plane sectional view showing a state in which a bar material for supporting a concrete buried object is inserted into a bar material insertion hole, and (b) is a partial side sectional view showing engagement between an engagement step portion and an outer surface of an upper side wall. . The sectional side view which shows the box for wiring arrange | positioned between the molds.

Explanation of symbols

  B ... Bar material for supporting concrete embedded object, 10 ... Concrete embedded device, 11 ... Bar material body, 11c ... Engagement step as engagement protrusion, 12 ... Reinforcing bar, 13 ... Box for wiring as concrete embedded object 20 ... Bar material insertion hole, 23 ... Formwork.

Claims (1)

It consists of a concrete buried object support bar made of a bar material body that can be bent in a three-dimensional direction, and a concrete buried object having a bar insertion hole through which the concrete buried object support bar material can be inserted,
The bar material for supporting concrete buried objects is inserted into a pair of bar material insertion holes, and both ends of the bar material for supporting concrete buried objects protruding from the concrete buried object are bent and fixed to the reinforcing bars forming the supporting frame of the concrete structure. The concrete is configured to support the concrete buried object by the reinforcing bar and to press the concrete buried object against the formwork erected for forming the concrete structure by the tensile strength of the bar material for supporting the concrete buried object. A buried device,
An engagement protrusion is formed only on one end side of the bar material main body, and the concrete embedded object supporting bar material is moved in the axial direction from the other end side of the bar material main body, and one of the pair of bar material insertion holes , The engaging protrusion is engaged with the peripheral edge of the opening of one of the bar material insertion holes, and the entry of the bar material for supporting the embedded concrete material into the bar material insertion hole is restricted. In this state, the position of the engaging protrusion in the length direction of the bar material body is set so that the protruding lengths of both ends of the bar material body protruding from the concrete object are substantially the same. Concrete embedded equipment with supporting bar material.

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