JP2018193711A - Reinforced concrete placing joint method and jig for reinforced concrete placing joint - Google Patents

Abstract

To provide a reinforced concrete placing joint method which achieves labor reduction in a placing joint step in the horizontal direction of reinforced concrete, and which can form a high-quality vertical placing joint surface, and to provide a jig for reinforced concrete placing joint.SOLUTION: A placing end material 11 is arranged at a vertical placing joint position P, and a frame 2 formed by a rigid body is arranged in a standing state so as to come into contact with a surface which is on the opposite side from a placing region D of the placing end material 11. Then, by using a support arm 3 in which one end part is connected to the frame 2 and the other end part has a clamp part 4 so as to be connected to a main reinforcement 12a, the clamp part 4 is connected to the main reinforcement 12a, and the frame 2 is fixed to the vertical placing joint position P. Then, concrete C is placed in the placing region D surrounded by a concrete form 10 and the placing end material 11, and after curing the placed concrete C, the connection of the clamp part 4 with respect to the main reinforcement 12a is released, and the frame 2 and the support arm 3 are removed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a reinforced concrete joining method and a reinforced concrete joining jig, and more particularly, to reduce the labor for the horizontal joining process of reinforced concrete and to form a high quality vertical joining surface. The present invention relates to a method for joining reinforced concrete and a jig for joining reinforced concrete.

  In the construction of reinforced concrete, there are cases in which concrete is placed in order for each section after the construction area is sectioned in a plane according to the scale of the building, construction procedures, geographical constraints, and the like. In this case, the concrete is handed over in the horizontal direction, and the concrete joint surface becomes a vertical joint surface that divides the beam, foundation, wall, slab, etc. in the vertical direction.

  Conventionally, a fastening frame is formed at a position where the vertical joining surface is formed by, for example, fixing a small-diameter reinforcing bar or a separator to a reinforcing bar of a structure with a wire or the like. By installing a net-like batting material (lass net, etc.) on the leading side of the batting frame and driving concrete into the section formed by the batting material and the formwork, Jointing is performed (see, for example, Patent Document 1).

  However, since the above-described stopper frame is not structurally strong, there is a problem that the stopper frame and the stopper material are easily distorted when the concrete is placed or when the concrete is compacted. Therefore, it is necessary to carefully work so that external force is not applied as much as possible to the fastening frame and the fastening material, and it is difficult to sufficiently compact the concrete with a vibrator near the vertical joining surface. . Furthermore, since the small-diameter rebars constituting the batting frame cannot be removed after the concrete is placed, voids may remain in the concrete due to the intricate bar arrangement. In addition, since a large number of work steps are required to form the stop frame, a large amount of labor is required for the process of joining the reinforced concrete in the horizontal direction.

Japanese Patent Publication No. 6-33680

  An object of the present invention is to provide a reinforced concrete joining method and a reinforced concrete joining jig capable of reducing the labor of the horizontal joining process of reinforced concrete and forming a high-quality vertical joining surface. There is to do.

  In order to achieve the above-mentioned object, the method of splicing reinforced concrete according to the present invention is such that a formwork is disposed outside a reinforcing bar construction portion including a main reinforcing bar extending in a horizontal direction, and a fastening material is installed at a vertical joining position. In the method of joining reinforced concrete in which reinforced concrete is cast in a horizontal direction by placing concrete in a casting area surrounded by the formwork and the fastening material, the fastening material is connected to the vertical casting And a frame formed of a rigid body in an upright state so as to abut on a surface opposite to the placement region of the batting material, and having one end connected to the frame. Using a support arm having a clamp part that can be connected to the main reinforcing bar at the other end, the clamp part is connected to the main reinforcing bar in a region opposite to the placement region with respect to the vertical joining position. Do The concrete is placed in the placement area with the frame fixed at the vertical joining position, and after the placed concrete is cured, the connection of the clamp portion to the main reinforcing bar is released. And removing the frame and the support arm.

  Reinforced concrete joining jig of the present invention, the formwork is disposed outside the reinforcing bar construction portion including the main reinforcing bar extending in the horizontal direction, and the fastening material is installed at the vertical joining position, Reinforced concrete joining jig for fixing the fastening material at the joining position when joining reinforced concrete in the horizontal direction by placing concrete in a placement area surrounded by the fastening material. A frame formed of a rigid body to which the batting material is attached, and a support arm having one end connected to the frame and a clamp portion that is connectable to the main reinforcing bar at the other end. The clamp portion is connected to the main reinforcing bar in a region where the frame arranged in a standing state at the vertical joining position is opposite to the placing region with respect to the vertical joining position, Lead Characterized by being configured to be secured to the striking joint position.

  According to the present invention, the batting material is disposed at the vertical joining position, and the frame formed of a rigid body is brought into contact with a surface of the batting material opposite to the placement area. Using a support arm which is arranged in an upright state and has one end connected to the frame and the other end connected to the main reinforcing bar, and the placement area with respect to the vertical joining position; Since the frame is fixed to the vertical joint position by connecting the clamp portion to the main reinforcing bar in the region on the opposite side, the stopper material can be firmly fixed to the vertical joint position. In addition, the frame can prevent deformation and deflection of the stopper material, so that the concrete can be sufficiently compacted by the vibrator even in the vicinity of the stopper material. Therefore, a high quality vertical joint surface can be formed. Moreover, since the fastening material can be easily fixed at the vertical joining position with a small number of work steps, the labor required for the joining process can be reduced.

  In the reinforced concrete joining jig according to the present invention, the frame can be constituted by a plurality of divided members that can be disassembled and assembled. With this configuration, the frame can be easily installed even when it is difficult to install the rebar, piping, and the like at the vertical joining position and the frame is integrated. Further, since the frame can be made compact by disassembling, the space required for storage and transportation can be reduced.

  In the reinforced concrete joining jig of the present invention, one end portion of the support arm may be rotatably connected to the frame. If it becomes this structure, it will become easy to connect the clamp part of a support arm to the main rebar of various positions. In addition, since the support arm is folded with respect to the frame, the space can be reduced, and the space required for storage and transportation can be reduced.

  In the reinforced concrete joining jig of the present invention, the support arm can be configured to be detachable from the frame. With this configuration, even if reinforcing bars and pipes are installed at the vertical joining position and it is difficult to install in a state where the frame and the support arm are integrated, the support arm is arranged after the frame and the support arm are separately arranged. Since the frame can be connected to the frame, the frame and the support arm can be easily installed. Moreover, since it can be made compact by removing the support arm from the frame, the space required for storage and conveyance can be reduced.

  In the reinforced concrete joining jig according to the present invention, the frame is a quadrangular frame, and at least one of a component member extending in the frame vertical direction or a component member extending in the frame horizontal direction is capable of expanding and contracting. It is also possible to have a configuration in which at least one of the frame vertical dimension and the frame horizontal dimension can be changed. With this configuration, it is possible to deal with vertical joint surfaces having various dimensions with a single reinforced concrete joining jig, so that versatility as a reinforced concrete joining jig can be enhanced. Further, since the frame is contracted to reduce at least one of the frame vertical dimension and the frame horizontal dimension, the space can be reduced.

It is explanatory drawing which illustrates the condition which is performing the piercing of reinforced concrete using the jig | tool for reinforced concrete joining of this invention by a side view. It is A1 arrow line view of FIG. It is explanatory drawing which illustrates the condition which poured concrete in the placement area | region of FIG. It is explanatory drawing which illustrates embodiment of the reinforced concrete joining jig | tool of FIG. 1 by a side view. It is A2 arrow line view of FIG. It is explanatory drawing which illustrates the state which decomposed | disassembled some reinforced concrete joining jigs of FIG. It is explanatory drawing which illustrates another embodiment which performs the joining of a reinforced concrete using the jig | tool for reinforced concrete joining of this invention by a side view. It is A3 arrow line view of FIG. It is explanatory drawing which illustrates further another embodiment which performs piercing of reinforced concrete using the jig | tool for reinforced concrete joining of this invention by planar view. It is explanatory drawing which illustrates another embodiment of the jig for reinforced concrete joining of this invention by a front view. It is explanatory drawing which illustrates further another embodiment of the jig for reinforced concrete joining of this invention by a side view.

  Hereinafter, a reinforced concrete joining method and a reinforced concrete joining jig according to the present invention will be described based on the embodiments shown in the drawings.

  In the joining method of the present invention, as shown in FIGS. 1 and 2, the molds 10a and 10b are arranged outside the reinforcing bar construction portion 12 including the main reinforcing bars 12a extending in the horizontal direction, and the vertical joining position P A batting material 11 such as a lath net is installed on the surface. Next, the concrete C is cast in the placement region D surrounded by the molds 10a and 10b and the stopper material 11, whereby the reinforced concrete RC is spliced in the horizontal direction as shown in FIG.

  When the reinforced concrete RC is cast in the horizontal direction, the reinforced concrete joining jig 1 of the present invention (hereinafter referred to as jig 1) according to the present invention is used for vertical joining. The position P can be firmly fixed. In the following description, first, the configuration of the jig 1 will be described, and then the details of the reinforced concrete joining method will be described.

  In this embodiment, a case where a beam extending in the horizontal direction is constructed is illustrated. The X direction in the figure of the present application indicates the longitudinal direction of the beam (horizontal direction in which the reinforced concrete RC is joined), the Y direction indicates the width direction of the beam, and the Z direction indicates the height direction (vertical direction) of the beam.

  A jig 1 of the present invention illustrated in FIG. 1 includes a frame 2 formed of a rigid body, a support arm 3 having one end connected to the frame 2, and a clamp portion connected to the other end of the support arm 3. 4.

  The frame 2 is formed of a metal member such as a shape steel or wood. As shown in FIGS. 4-6, the flame | frame 2 of this embodiment is comprised by the square-shaped frame formed by combining several division | segmentation members which can be disassembled and assembled. The frame 2 includes two vertical frame constituent members 2a extending in the frame vertical direction (Z direction) and six horizontal frame constituent members 2b extending in the frame horizontal direction (Y direction). Yes.

  The vertical frame component member 2a and the horizontal frame component member 2b are made of L-shaped steel (angle steel, angle steel), and the vertical frame component member 2a and the horizontal frame component member 2b are fasteners 5 made of bolts and nuts ( 5a) is detachably connected. A plurality of round holes 6a are formed in the vertical frame constituent member 2a at intervals, and the connection position of the horizontal frame constituent member 2b with respect to the vertical frame constituent member 2a can be changed. The configuration of the frame 2 is not limited to the above-described embodiment, and the shape and size of the frame 2, the number of members constituting the frame 2, the connection method between the members, and the like can be set as appropriate.

  The support arm 3 is formed of a metal member such as a shape steel or wood. The support arm 3 of this embodiment is made of L-shaped steel. As shown in FIG. 5, a total of four support arms 3 are arranged at intervals in the longitudinal direction (Z direction) and the lateral direction (Y direction) of the frame. One end of each support arm 3 and the frame 2 (vertical frame constituent member 2a) is detachably attached to the fastener 5 (5b) and is rotatably connected. As shown in FIG. 4, a plurality of round holes 6a are formed in the vertical frame constituent member 2a at intervals in the vertical direction (Z direction), and the connection position of the support arm 3 with respect to the vertical frame constituent member 2a is determined. It can be changed.

  The clamp part 4 is a connection tool having a mechanism that can be coupled to the main reinforcing bar 12a. As shown in FIG. 6, the clamp part 4 of this embodiment has two metal fittings 4a, 4a and a fastener 5 (5d), and sandwiches the main rebar 12a between the metal fittings 4a, 4a. The clamp 4 and the main rebar 12a are connected by fastening the two metal fittings 4a and 4a with the fastener 5d. The clamp part 4 and the other end part of the support arm 3 are detachably attached by a fastener 5 (5c) and are rotatably connected. In addition, the main rebar 12a said here is a rebar with a diameter of 10 mm-51 mm, for example.

  Next, an example of a method for performing horizontal joining of the reinforced concrete RC using the jig 1 will be described. In this embodiment, the case where the piercing of the reinforced concrete RC in the horizontal direction (X direction) is further performed from the state where there is the vertical piercing surface JS of the reinforced concrete previously placed is illustrated.

  As shown in FIGS. 1 and 2, first, the mold 10 a is installed on the lower side of the reinforcing bar building portion 12. Next, the batting material 11 is arranged at the vertical joining position P. Then, the frame 2 is arranged in an upright state so as to abut on the surface of the stopper material 11 opposite to the placement region D. More specifically, the frame 2 is formed with substantially the same size as the vertical joining surface JS1 to be formed, and the stopper material 11 is formed with a size slightly smaller than the vertical joining surface JS1. The frame 2 is arranged so as to block the entire vertical joining surface JS1, and the stopper material 11 is arranged so that a slight gap is formed on the upper side and the left and right sides with respect to the vertical joining surface JS1. The lower ends of the batting material 11 and the frame 2 are arranged in accordance with the lower end (form frame 10a) of the vertical joining surface JS1. In other words, the gaps formed on the upper side and the left and right sides of the stopper material 11 on the vertical joining surface JS 1 are almost closed by the frame 2.

  The arrangement method of the frame 2 will be described more specifically. When the frame 2 can be arranged in an integrated state, the main rebar 12a, the pipe 13 and the like are penetrated from the opposite side of the placement area D where the concrete C is placed. In this way, the frame 2 is moved to the vertical joining position P and arranged. When the main rebar 12a, the pipe 13, etc. become obstacles and it is difficult to arrange the frame 2 in an integrated state, the frame 2 is disassembled into a plurality of disassembled members (vertical frame constituting member 2a, horizontal frame constituting member 2b) The frame 2 is assembled by arranging the divided members at the vertical joining position P and connecting the divided members with the fasteners 5a at the vertical joining position P. Similarly, when it is difficult to arrange the support arm 3 in an integrated state with the frame 2, the support arm 3 is arranged separately from the frame 2 while being detached from the frame 2, and after the arrangement, the frame 2 and the support arm 3 are fastened together. Connect by 5b.

  Next, the clamp part 4 is connected to the main reinforcing bar 12a in a region opposite to the placement region D with respect to the vertical joining position P. Thus, the frame 2 is fixed to the vertical joining position P. In this embodiment, the clamp portions 4 of the four support arms 3 are fixed to the main reinforcing bars 12a, respectively, so that the frame 2 is held by the four supporting arms 3 connected to the main reinforcing bars 12a.

  More specifically, before the clamp part 4 is coupled to the main reinforcing bar 12a, the fastener 5b that connects the frame 2 and one end part of the support arm 3 is loosened and the support arm 3 is attached to the frame 2. Is in a rotatable state. Similarly, the fastener 5c that connects the other end portion of the support arm 3 and the clamp portion is also loosened so that the clamp portion 4 is rotatable with respect to the support arm 3. Then, without moving the frame 2 from the vertical joining position P, the support arm 3 and the clamp part 4 are rotated, the clamp part 4 is connected to the main rebar 12a, and the fastener 5d is tightened to clamp The part 4 and the main reinforcing bar 12a are connected. And the fastener 5b and the fastener 5c are tightened tightly, and it fixes so that each connection location of the flame | frame 2, the support arm 3, and the clamp part 4 may not move.

  Next, the mold frames 10b are arranged on both the left and right sides of the reinforcing bar construction portion 12b, and the vertical joining surfaces JS formed by the mold frames 10a and 10b, the stopper material 11 (frame 2), and the reinforced concrete previously placed thereon, Concrete C is placed in the placement area D surrounded by. Then, the concrete C is compacted by a vibrator or the like. When the above steps are completed, the state shown in FIG. 3 is obtained. Then, after curing the placed concrete C, the connection of the clamp portion 4 to the main rebar 12a is released, and the frame 2 and the support arm 3 are removed. Then, a new vertical joint surface JS1 is formed at the position of the stopper material 11.

  In this embodiment, since the stopper material 11 is arranged so as to form a slight gap on the upper side and both left and right sides with respect to the vertical joining surface JS1, after the concrete C is placed, the upper surface and the left and right sides of the beam are arranged. The finish is such that the batting material 11 is not exposed on both side surfaces.

  The order of the work steps before placing the concrete C shown above can be changed as appropriate. Moreover, each work process can also be advanced in parallel. For example, after placing the frame 2 in a standing state at the vertical joining position P, the stopper material 11 can be attached to the frame 2. In this embodiment, the formwork 10a is supported by the base 14 provided below the formwork 10a. However, the fixing method of each formwork 10a, 10b can be selected as appropriate.

  When there is no vertical joint surface JS formed by the reinforced concrete RC previously placed, for example, when joining at the end of the structure, the vertical joint formed by the reinforced concrete placed first is performed. Instead of the joint surface JS, the mold 10 is arranged, and the concrete C is placed in the placement area D surrounded by the mold 10 and the stopper material 11. Further, for example, when it is desired to form new vertical joining surfaces JS1 on both the left and right sides, the stopper material 11 and the jig 1 are installed on both the left and right sides as described above, and the mold 10 and the two pieces of punching are placed. Concrete C is placed in the placement area D formed by the stopper 11.

  As described above, according to the present invention, the clamp member 4 is connected to the main reinforcing bar 12a, the frame 2 is fixed to the vertical joining position P, and the stopper material 11 is supported by the frame 2 so that the stopper material 11 is supported. Can be firmly fixed to the vertical joining position P. In addition, since the deformation and deflection of the stopper material 11 can be prevented by the frame 2, the concrete C can be sufficiently compacted by a vibrator or the like even in the vicinity of the stopper material 11. Therefore, a high quality vertical joint surface JS1 can be formed.

  Moreover, in this invention, since the flame | frame 2 is fixed using the main reinforcement 12a which comprises reinforced concrete RC, it is not necessary to install temporary structures other than the jig | tool 1. FIG. Further, since the fastening material 11 can be easily fixed at the vertical joining position P with a small number of work steps, the labor required for the joining process can be greatly reduced as compared with the conventional method. Moreover, since the main reinforcement 12a is high in strength and has a low risk of deformation or breakage, it is very suitable for fixing the jig 1.

  Furthermore, in the present invention, since the jig 1 can be removed after the concrete C is placed, the members such as the stop frame for fixing the stop 11 are placed in the placement region D or the vertical as in the prior art. It does not remain on the surface of the joining surface JS1. Therefore, it is possible to avoid the problem that voids remain in the concrete C, and it is possible to form a high-quality reinforced concrete RC.

  Further, in this embodiment, since the stopper material 11 is arranged so as to form a slight gap on the upper side and both left and right sides with respect to the vertical joining surface JS1, the upper surface and both left and right side surfaces of the constructed beam are hit. It can be finished so that the stopper 11 is not exposed. For example, when the stopper material 11 is made of iron, the stopper material 11 may rust if the stopper material 11 is exposed to the outside. In this embodiment, the stopper material 11 is exposed. Therefore, it is possible to form a high-quality reinforced concrete RC in which rust is unlikely to occur in the stopper material 11. In this embodiment, the lower end of the fastening material 11 is arranged so as to match the lower end of the vertical joining surface JS1, but a gap is formed below the fastening material 11 with respect to the vertical joining surface JS1. It can also be arranged.

  In this embodiment, since the frame 2 is composed of a plurality of divided members that can be disassembled and assembled, the main rebar 12a and the pipe 13 are installed at the vertical joint position P, and the frame 2 is installed in an integrated state. Even when it is difficult, the frame 2 can be easily installed. Moreover, since the connection position of the horizontal frame structural member 2b with respect to the vertical frame structural member 2a can be changed, according to arrangement | positioning of the main reinforcing bar 12a or the piping 13, the number and connection position of the horizontal frame structural member 2b can be changed suitably. Further, since the frame 2 can be made compact by disassembling, the space required for storage and transportation can be reduced.

  Moreover, since the one end part of the support arm 3 is rotatably connected to the frame 2, the clamp part 4 of the support arm 3 can be coupled to the main reinforcing bars 12a at various positions. Furthermore, in this embodiment, since the clamp part 4 is rotatably connected to the other end part of the support arm 3, the operation | work which connects the clamp part 4 to the main reinforcement 12a can be performed easily. In addition, since the support arm 3 is folded with respect to the frame 2, the space can be reduced because it can be made compact.

  Furthermore, in this embodiment, since the support arm 3 is configured to be detachable from the frame 2, the main reinforcing bar 12a, the pipe 13 and the like are installed at the vertical joint position P, and the frame 2 and the support arm 3 are connected. Even in the case where it is difficult to install in an integrated state, the support arm 3 can be connected to the frame 2 after the frame 2 and the support arm 3 are separately arranged. Further, since the connection position of the support arm 3 can be changed with respect to the frame 2 (vertical frame component 2a), the connection position of the support arm 3 with respect to the frame 2 is appropriately selected according to the arrangement of the main reinforcing bars 12a. By doing, the operation | work which connects the clamp part 4 to the main reinforcement 12a becomes easier.

  Furthermore, since the clamp part 4 is configured to be detachable from the support arm 3, for example, when the shape of the clamp part 4 does not match the shape of the main reinforcing bar 12a, the clamp part 4 is replaced with another clamp part 4. It can also be exchanged. Moreover, since it can be made compact by removing the support arm 3 and the clamp part 4 from the flame | frame 2, the space required for storage and conveyance can be made small.

  The joint between the jig 1, the stopper material 11, and the molds 10a and 10b when the reinforced concrete RC is cast in the horizontal direction can be configured as shown in FIGS. In this embodiment, similarly to the embodiment shown in FIGS. 1 to 6, the reinforced concrete RC is spliced in the horizontal direction (X direction) from the state where there is the vertical joint surface JS of the reinforced concrete previously placed. The case is illustrated.

  In this embodiment, the frame 2 is formed with a size smaller than the vertical joining surface JS1 to be formed, and the stopper material 11 is formed with substantially the same size as the vertical joining surface JS1. The stopper material 11 is disposed so as to cover the entire vertical joint surface JS1, and the frame 2 is disposed such that a gap is formed on the vertical joint surface JS1 on the upper, lower, left, and right sides. That is, the lower end of the fastening material 11 is arranged in accordance with the lower end (form 10a) of the vertical joining surface JS1, and the left and right ends of the fastening material 11 are the left and right ends of the vertical joining surface JS1 (form 10b). It is arranged according to. And the stopper material 11 is in the state supported by the jig | tool 1 which has the flame | frame 2 whose vertical and horizontal dimensions are smaller than the stopper material 11. The configuration of the jig 1, the fixing method of the jig 1, and the method of placing concrete C are the same as those in the embodiment shown in FIGS.

  In this embodiment, since the jig 1 having the frame 2 having a smaller dimension than the vertical joining surface JS1 to be formed is used, the jig 1 can be easily installed. In addition, since it is not necessary to match the dimension of the frame 2 to the vertical joining surface JS1, the horizontal joining of the reinforced concrete RC can be performed with a very small number of work steps. Furthermore, since the concrete C does not directly adhere to the frame 2, the work of removing the jig 1 (frame 2) is very easy.

  The arrangement of the jig 1, the stopper material 11, and the mold 10b when the reinforced concrete RC is cast in the horizontal direction can be configured as shown in FIG. This embodiment is different from the embodiment shown in FIGS. 7 and 8 in the engagement at the left and right end portions and the lower end portion of the vertical joining surface JS1 formed therefrom. Other configurations are the same as those of the embodiment shown in FIGS.

  In this embodiment, the left and right dimensions of the frame 2 are smaller than the vertical joining surface JS1 to be formed, and the left and right and upper and lower dimensions of the stopper material 11 are slightly larger than the vertical joining surface JS1. It is formed with small dimensions. The stopper material 11 is arranged so that a gap is formed between the left and right sides and the lower side (the mold 10a side) of the vertical joining surface JS1, and the frame 2 is arranged on both the left and right sides of the vertical joining surface JS1. It arrange | positions so that a clearance gap may be formed in the lower side. That is, a slight gap is formed between the left and right ends of the stopper material 11 and the mold frame 10b and between the lower end and the mold frame 10a. In this embodiment, joint rods 14 are respectively installed so as to fill the gaps, and these joint rods 14 are fixed to the mold 10b and the mold 10a by nails, respectively. That is, the left and right sides and the lower side of the vertical joining surface JS1 are closed by the stopper material 11 and the joint rod 14. Further, the stopper material 11 is supported by the jig 1 having the frame 2 whose left and right dimensions are smaller than those of the stopper material 11. The joint rod 14 is removed after curing the cast concrete C.

  For example, the joint rod 14 may be formed of resin, wood, metal, or the like, and the shape can be selected as appropriate. A face wood can be used instead of the joint rod 14.

  In this embodiment, a slight gap is formed between the left and right sides of the batting material 11 and the mold 10b and the lower side and the mold 10a, and the joint rod 14 is installed so as to fill the gap. High-quality reinforced concrete in which rust is not easily generated on the stopper 11 by removing the joint rod 14 later and filling it with mortar. RC can be formed.

  In the above embodiment, a method for performing horizontal joining of the reinforced concrete RC using the jig 1 having the frame 2 having the same dimension or a small dimension with respect to the vertical joining surface JS1 to be formed will be exemplified. However, it is also possible to perform the horizontal joining of the reinforced concrete RC using the jig 1 having the frame 2 having a large dimension with respect to the vertical joining surface JS1.

  The jig 1 of the present invention can be configured as shown in FIG.

  The jig 1 of this embodiment is the same as the embodiment shown in FIGS. 1 to 6 in that the frame 2 is formed of a quadrangular skeleton, but the vertical frame constituent member extending in the frame vertical direction. 2a and the horizontal frame constituent member 2b extending in the horizontal direction of the frame are configured to have an extendable mechanism. The frame vertical dimension and the frame horizontal dimension can be changed.

  In this embodiment, the vertical frame constituting member 2a is configured by combining two divided members 2c and 2c, and the longitudinal direction (Z direction) of the round holes 6a and the divided members 2c are provided at a plurality of locations of the divided members 2c and 2c. A long hole 6b extending to) is formed. Then, the split member 2c and the split member 2c are slid in the vertical direction (Z direction), the position of the round hole 6a or the long hole 6b to be overlapped is changed, and fixed by the fastener 5 (5e). The vertical dimension can be changed.

  Similarly to the vertical frame component 2a, the horizontal frame component 2b is configured by combining two divided members 2d and 2d, and the round holes 6a and the lengths of the divided members 2d are formed at a plurality of locations of the respective divided members 2d and 2d. A long hole 6b extending in the direction (Y direction) is formed. Then, the horizontal dimension of the frame is changed by sliding the split member 2d and the split member 2d in the horizontal direction, changing the position of the round hole 6a or the long hole 6b to be overlapped, and fixing with the fastener 5 (5f). It can be configured. The dividing members 2d and 2d can be made of, for example, channel steels having different sizes.

  If the frame vertical dimension and horizontal dimension can be changed as in this embodiment, a single jig 1 can cope with vertical joining surfaces of various dimensions, so that the versatility is very high. Therefore, it is not necessary to prepare the jig 1 having an optimal size according to the placement site, and it is extremely useful for the parties to reduce manufacturing cost, man-hours, inventory management, and the like. Furthermore, since the frame 2 can be contracted to reduce the vertical and horizontal dimensions of the frame, the space can be reduced.

  Further, when the jig 1 is used, for example, when the frame 2 is arranged at the vertical joining position P, the vertical frame constituent member 2a is extended until it contacts the ground or the ground below, and the vertical frame constituent member The load of the frame 2 can be supported by 2a. If it does in this way, since the load concerning the support arm 3 or the clamp part 4 can be reduced, the weight reduction of the support arm 3 or the clamp part 4 can be achieved. Moreover, since the frame 2 can be erected in a stable state at the vertical joining position P by grounding the vertical frame component 2a to the base or the ground, the work of connecting the clamp portion 4 and the main reinforcing bar 12a is easier. It can be done with a small number of workers.

  As shown in FIG. 11, the jig 1 of the present invention can also be configured with a mechanism capable of extending and retracting the support arm 3. In this embodiment, the support arm 3 is configured by combining two divided members 3a and 3a, and a long hole 6b extending in the longitudinal direction of the divided member 3a is formed in each divided member 3a and 3a. . And the structure which can change the length of the support arm 3 by sliding the division member 3a and the division member 3a to the longitudinal direction of a support arm, changing the position which overlaps, and fixing with the fastener 5 (5g). It has become. The dividing members 3a and 3a can be made of, for example, channel steels having different sizes. As a mechanism for making the support arm 3 extendable / contractable, a configuration in which round holes 6a and long holes 6b are provided at a plurality of locations in the longitudinal direction of the dividing member 3a may be employed.

  In this embodiment, a plurality of elongated holes 6b are formed in the vertical frame constituent member 2a at intervals in the vertical direction (Z direction), and the connection position of the support arm 3 with respect to the vertical frame constituent member 2a can be changed. It has become.

  If the support arm 3 is configured to be extendable and contractable as in this embodiment, the clamp portion 4 of the support arm 3 can be connected to the main rebar 12a at various positions. Furthermore, since it can be made compact by making the support arm 3 contracted, the space required for storage and transport can be reduced.

  The present invention can also be employed when building foundations, walls, slabs, and the like.

DESCRIPTION OF SYMBOLS 1 Reinforced concrete joining jig 2 Frame 2a Vertical frame component member 2b Horizontal frame component member 2c Split member 2d of vertical frame component member Divided member 3 of horizontal frame component member Support arm 3a Split member 4 of support arm Clamp part 4a Metal fitting 5 Fasteners (bolts and nuts)
5a-5g Fastener 6a Round hole 6b Long hole 10a, 10b Formwork 11 Stopping material 12 Reinforcing bar construction part 12a Main reinforcing bar 13 Pipe 14 Joint rod P Vertical joining position D Placing area JS, JS1 Vertical joining surface C Concrete RC reinforced concrete

Claims (6)

Placing the formwork outside the reinforcing bar construction part including the main rebar extending in the horizontal direction, installing the fastening material at the vertical joining position, and placing it surrounded by the formwork and the fastening material In the method of casting reinforced concrete in which the reinforced concrete is cast in the horizontal direction by placing concrete in the area,
Arranging the batting material at the vertical joint position, and arranging the frame formed of a rigid body in an upright state so as to abut on the surface opposite to the placement area of the batting material, In a region that is opposite to the placement region with respect to the vertical joining position, using a support arm having one end connected to the frame and a clamp portion that is connectable to the main rebar at the other end. By connecting the clamp part to the main reinforcing bar, the concrete is placed in the placement area in a state where the frame is fixed to the vertical joining position, and after the placed concrete is cured, the clamp The connection method of the reinforced concrete characterized by removing the connection of the part to the main reinforcing bar and removing the frame and the support arm. Placing the formwork outside the reinforcing bar construction part including the main rebar extending in the horizontal direction, installing the fastening material at the vertical joining position, and placing it surrounded by the formwork and the fastening material Reinforced concrete joining jig for fixing the fastening material to the joining position when casting concrete in the region to horizontally join reinforced concrete,
A frame formed of a rigid body to which the batting material is attached, and a support arm having a clamp portion that is connected to the frame at one end and is connectable to the main reinforcing bar at the other end.
The clamp portion is connected to the main reinforcing bar in a region where the frame arranged in a standing state at the vertical joining position is opposite to the placing region with respect to the vertical joining position, A reinforced concrete joining jig characterized by being configured to be fixed at the vertical joining position.   The reinforced concrete joining jig according to claim 2, wherein the frame is composed of a plurality of divided members that can be disassembled and assembled.   The reinforced concrete joining jig according to claim 2 or 3, wherein one end of the support arm is rotatably connected to the frame.   The reinforced concrete joining jig according to any one of claims 2 to 4, wherein one end of the support arm is detachable from the frame.   The frame is a quadrangular frame, and at least one of a component extending in the frame vertical direction or a component extending in the frame horizontal direction has a telescopic mechanism, and the frame vertical dimension and the frame horizontal The reinforced concrete joining jig according to any one of claims 2 to 5, wherein at least one of the dimensions is configured to be changeable.

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