JP2018003484A - Form structure and construction method of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form structure for easily constructing a structure.SOLUTION: A form structure 10 is used for a place of projecting a reinforcement 3 of a sidewall in the substantially horizontal direction from the sidewall when placing concrete of the sidewall by executing bar arrangement in a form 9. The form structure 10 is constituted of an elastic form 7, a bolt 15 and a nut 17. The elastic form 7 is provided with a substantially semicircular cutout part in a substantially rectangular rubber plate material, and when vertically combining two elastic forms 7, a reinforcement insertion hole 75 for inserting a reinforcement can be formed by the cutout part of both elastic forms 7. The reinforcement insertion hole 75 is a substantially circular shape, and its diameter is smaller than a diameter of the reinforcement 3, but mutual upper-lower forms 9 of sandwiching the elastic form 7 are fastened by using the bolt 15 and the nut 17, and thereby, the elastic form 7 is pressurized and compressed to the reinforcement 3 side, and becomes the reinforcement insertion hole 75 of a size fitted to the reinforcement 3 by deforming the cutout part, and the elastic form 7 and the reinforcement 3 are brought into close contact with each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a formwork structure and a method for constructing a structure using the same.

  As shown in FIG. 12, a reinforcing bar 103 protruding in a substantially horizontal direction from the side wall 101 may be embedded in the floor slab 105 in a concrete joint portion of the reinforced concrete side wall 101 and the floor slab 105 (for example, Patent Document 1). reference).

  When forming the side wall 101, for example, as shown in FIG. 13A, when placing concrete inside the mold frame 109 to place concrete on the side wall 101, the mechanical joint 107 is brought into contact with the inner surface of the mold frame 109. The rebar 103a in the substantially horizontal direction in the side wall 101 is connected to the mechanical joint 107. After the concrete is placed, the mold 109 is removed, and a rebar in a substantially horizontal direction is connected to the mechanical joint 107 to place the concrete of the floor slab 105, thereby forming the floor slab 105 in which the rebar is embedded in the concrete.

  Alternatively, as shown in FIG. 13 (b), a metal mesh 117 such as a mesh mold, a lath metal mesh, or a turtle shell metal mesh is used as an embedded mold, and the reinforcing bar 103 penetrates the metal mesh 117 and protrudes to the floor slab 105 side. Then, the concrete of the side wall 101 is placed. Thereafter, the concrete of the floor slab 105 is cast to form the floor slab 105 in which the reinforcing bars 103 are embedded in the concrete. In this example, a lap joint can be formed between the reinforcing bar 103 protruding from the side wall 101 and a substantially horizontal reinforcing bar (not shown) embedded in the floor slab 105.

  On the other hand, Patent Document 1 describes an example in which a formwork provided with a hole for inserting a reinforcing bar is used for a concrete joint, and a substantially semicircular cutout 122 is formed as shown in FIG. In some cases, a wooden formwork 121 provided with a wall is used.

  In the example of FIG. 13 (c), the molds 121 are arranged one above the other and holes are formed by the notches 122 of the two molds 121. The reinforcing bars 103 are inserted into these holes and protruded toward the floor slab 105 side wall 101. Of concrete. After placing the concrete, the formwork 121 is removed and the concrete of the floor slab 105 is cast to form the floor slab 105 in which the reinforcing bars 103 are embedded in the concrete. Also in this example, a lap joint can be formed between the reinforcing bar 103 protruding from the side wall 101 and the substantially horizontal reinforcing bar (not shown) embedded in the floor slab 105.

JP 2001-73556 A

  In the example of FIG. 13A, the cost of the mechanical joint 107 is increased, and the reinforcing bars used are also limited to expensive screw reinforcing bars. Further, the mold 109 may be caught by the concrete pouring pressure, and the mortar may be covered with the mechanical joint 107. In this case, the mortar covered with the mechanical joint 107 must be attached after the mold 109 is removed. There is. As a countermeasure, there is a method of fastening the mold 109 to the mechanical joint 107 using a bolt or the like, but this takes time.

  In the example of FIG. 13B, the concrete aggregate on the side wall 101 that has been placed is clogged with the wire mesh 117, thereby preventing the mortar from flowing out. However, when the penetration of the reinforcing bar 103 or the connection between the metal mesh 117 and the formwork 109 is not reliably blocked and mortar flows out, post-processing such as cleaning the reinforcing bar 103 and the metal mesh 117 and removing the mortar is necessary. It often takes time and effort.

  Even when the reinforcing bar is inserted into the hole of the mold as shown in FIG. 13C, the mortar may flow out from the gap between the mold and the reinforcing bar, and it is often necessary to clean the reinforcing bar. . In the example of FIG. 13C, the gap between the formwork 121 and the reinforcing bar 103 can be closed with a piece of wood or waste, but if the piece of wood or waste bites into the placed concrete, the concrete is chipped. However, it is necessary to remove wood chips and waste.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a formwork structure or the like that facilitates the construction of a structure.

  According to a first aspect of the present invention for achieving the above object, there is provided a formwork structure in which a reinforcing bar protrudes from the structural body in a substantially horizontal direction when placing the concrete of the structural body. A plurality of elastic molds that can be combined so that a reinforcing bar insertion hole for inserting a reinforcing bar is formed, and a pressurizing unit that pressurizes the plurality of elastic molds to the reinforcing bar side. Is a formwork structure.

  In the present invention, a plurality of elastic molds that can be combined so that a reinforcing bar insertion hole for inserting a reinforcing bar is formed, and the elastic mold is pressed against the reinforcing bar by a pressurizing means, and is compressed. Reinforcing bars can be fixed by the restoring force. This prevents gaps between the reinforcing bars and the elastic formwork, prevents concrete mortar from leaking from the gaps, reduces post-processing work, and facilitates construction of structures. it can. In addition, the reinforcing bars protruding in the substantially horizontal direction from the structure can be used for lap joints, and screw joints and mechanical joints are not required, and joints can be formed at low cost.

The reinforcing bar insertion hole is substantially circular, and the diameter of the reinforcing bar insertion hole is smaller than the diameter of the reinforcing bar. The elastic mold is made of rubber.
The diameter of the rebar insertion hole that can be formed by combining the elastic formwork is smaller than the diameter of the rebar. The frame and the reinforcing bar can be brought into close contact with each other, and it is possible to reliably prevent a gap from being generated between the elastic mold frame and the reinforcing bar. Further, by making the elastic mold frame rubber, the elastic mold frame does not bite into the concrete, and the elastic mold frame can be easily removed without performing chipping or the like.

The elastic mold frame is, for example, a substantially rectangular plate material provided with a substantially semicircular cutout, and the reinforcing bar insertion hole is formed by combining the two elastic moldframes with the cutouts of both elastic molds. It is possible.
The pressurizing unit is a binding material that pressurizes the elastic mold by, for example, fastening two molds provided between the elastic molds.
In this way, by using the elastic mold as a substantially rectangular plate material, commonly used molds are used on both sides of the elastic mold, and the elastic molds are pressed by tightening the molds with a binding material. It becomes possible. When the elastic mold is pressed, the elastic mold and the mold are in close contact with each other, so that the mortar content of the concrete does not leak out from the gap between the elastic mold and the mold.

The formwork structure of 1st invention may comprise the some auxiliary | assistant formwork which can be combined so that the hole for arrange | positioning the said elastic formwork may be formed.
The pressurizing means is a binding material that presses the elastic mold frame disposed in the hole by tightening two auxiliary mold frames that can be combined so that the hole is formed, for example.
In this way, it is possible to form a hole for arranging an elastic mold by combining a plurality of auxiliary molds, and arrange the elastic mold in the hole. Can be pressurized. In this case, the area occupied by the elastic mold can be reduced, and the rigidity of the entire mold structure can be increased.

For example, when a plurality of the elastic molds are combined so that the reinforcing bar insertion holes are formed, the outer periphery thereof is substantially circular, and the holes formed when the plurality of auxiliary molds are combined are substantially circular. .
Alternatively, when a plurality of the elastic molds are combined so that the reinforcing bar insertion holes are formed, the outer periphery thereof becomes a substantially square shape, and the holes formed when the plurality of auxiliary molds are combined are substantially a square shape It is.
As described above, the shapes of the elastic formwork and the auxiliary formwork can be variously determined in consideration of workability and cost.

  The second invention uses the formwork structure of the first invention at a location where the reinforcing bar protrudes from the first structure in a substantially horizontal direction, and places the concrete of the first structure, A step of removing the formwork structure after placing the concrete of the structure, and a second method in which a reinforcing bar arranged so that a lap joint is formed between the reinforcing bar and the reinforcing bar is embedded in the concrete. And a step of forming the structure.

  ADVANTAGE OF THE INVENTION According to this invention, the formwork structure etc. which make construction of a structure easy can be provided.

The figure shown about the outline of the construction method of the side wall 1 and the floor slab 2 using the formwork structure 10 The figure which shows the formwork structure 10 The figure which shows the elastic formwork 7 The figure explaining the formation method of the formwork structure 10 The figure explaining the formation method of the formwork structure 10 The figure which shows the formwork structure 10a The figure which shows the elastic formwork 4 and the auxiliary formwork 5 The figure explaining the formation method of the formwork structure 10a The figure explaining the formation method of the formwork structure 10a The figure which shows elastic formwork 4a, 4a ', 4b and auxiliary formwork 5' The figure which shows the formwork structure 10b The figure which shows the concrete joint part of the side wall 101 and the floor slab 105 The figure which shows the formwork in the concrete joint part of the side wall 101 and the floor slab 105

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
(1. Outline of Construction Method of Side Wall 1 and Floor Slab 2 Using Formwork Structure 10)
FIG. 1 is a diagram showing an outline of a method of constructing a side wall 1 (first structure) and a floor slab 2 (second structure) using a formwork structure 10 according to the first embodiment of the present invention. is there.

  As shown in FIG. 1 (a), the formwork structure 10 of the present embodiment is arranged such that the reinforcing bars 3 of the side wall 1 are removed from the side wall 1 when placing concrete in the formwork 9 and placing concrete on the side wall 1. It is used for a portion (a side wall 1 and a concrete joint portion of the floor slab) protruding in a substantially horizontal direction on the floor slab side.

  After placing the concrete on the side wall 1, the formwork structure 10 and the formwork 9 are removed, and the floor slab is placed on the side of the side wall 1 as shown in FIG. An installation form (not shown) is arranged. At the time of bar arrangement, a substantially horizontal reinforcing bar 21 is arranged so that a lap joint is formed with the reinforcing bar 3.

  After that, when concrete is placed in the above-mentioned formwork and demolding is performed, a floor slab 2 is formed as shown in FIG. The above-mentioned reinforcing bars 3 and 21 are embedded in the concrete of the floor slab 2.

(2. Formwork structure 10)
FIG. 2 is a view showing the mold structure 10. 2A is a view showing the front of the mold structure 10 viewed from the left side of FIG. 1A, and FIG. 2B is a vertical direction along line AA in FIG. 2A. FIG. The same applies to FIGS. 4 and 5 described later.

  The mold structure 10 includes an elastic mold 7, bolts 15, nuts 17 and the like, and holds and fixes a plurality of reinforcing bars 3 arranged in the horizontal direction between the upper and lower molds 9.

  The elastic mold 7 is an elastic mold. The elastic mold 7 is formed of an elastic member and is made of rubber in this embodiment.

  FIG. 3 is a view showing the elastic mold 7. The elastic mold 7 is configured by providing a substantially semicircular cutout 73 on one side of a substantially rectangular plate. In this embodiment, when the two elastic molds 7 are combined up and down, a substantially circular reinforcing bar insertion hole 75 for inserting the reinforcing bar 3 can be formed by the notch 73 of both elastic molds 7.

  The diameter (diameter) r1 of the reinforcing bar insertion hole 75 is smaller than the diameter of the reinforcing bar 3, but when the elastic mold 7 is pressed and compressed as will be described later, the deformation fits the reinforcing bar 3 as shown in FIG. The reinforcing bar insertion hole 75 has a size. The reinforcing bar 3 is arranged so as to protrude from the reinforcing bar insertion hole 75 in a substantially horizontal direction.

  The elastic mold 7 is also provided with a through-hole 71 that vertically penetrates the elastic mold 7. When the elastic mold 7 is combined vertically, the positions of the through-holes 71 of both elastic molds 7 correspond to each other. It is supposed to be.

  The mold 9 is a plate member, and for example, a general steel mold such as metal foam can be used. As shown in FIG. 2, the molds 9 are respectively arranged on the upper and lower sides of the elastic molds 7 so as to sandwich the upper and lower elastic molds 7.

  The mold 9 has a rib 91, and the rib 91 is arranged according to the elastic mold 7. A hole 93 is formed in the rib 91, and the position of the hole 93 is made to correspond to the position of the through hole 71 of the elastic mold 7.

  The bolt 15 (tightening material) is passed through the through hole 71 of each elastic mold 7 and the hole 93 of the rib 91 of each mold 9, and the nut 17 is tightened at the tip thereof. As a result, the two molds 9 are tightened with the elastic mold 7 interposed therebetween.

  In order to form the mold structure 10, as shown in FIGS. 4A and 4B, first, the elastic mold 7 is placed on the rib 91 of the lower mold 9 with the notch 73 upward. Place the rebar 3 on the cutout 73 of the elastic mold 7.

  Next, as shown in FIGS. 5A and 5B, the elastic mold 7 is placed on the reinforcing bar 3, and the ribs 91 are placed on the elastic mold 7 to place the mold 9. The elastic mold 7 is arranged with the notch 73 aligned with the position of the reinforcing bar 3.

  Then, the bolts 15 are passed through the through holes 71 of the upper and lower elastic molds 7 and the holes 93 of the ribs 91 of the upper and lower molds 9, and the nuts 17 are tightened at the tips thereof, and the two molds sandwiching the elastic mold 7 Tighten the frames 9 together.

  Thereby, the elastic formwork 7 is pressurized and compressed to the reinforcing bar 3 side as shown by an arrow a in FIG. That is, the bolt 15 has a role as a pressurizing unit for pressurizing the elastic mold 7 to the reinforcing bar 3 side. At this time, the notch 73 or the like of the elastic mold 7 is deformed according to the shape of the reinforcing bar 3 to form a reinforcing bar insertion hole 75 having a size matching the size of the reinforcing bar 3, and the elastic mold 7 and the reinforcing bar 3 are in close contact with each other. A gap between the elastic mold 7 and the reinforcing bar 3 is closed. Note that when the elastic mold 7 is pressed, the elastic mold 7 and the mold 9 are also in close contact.

  Thereafter, as shown in FIG. 1 (a), the concrete is poured into the side wall 1. The formwork structure 10 is removed after placing the concrete. At this time, the nut 17 is loosened, the bolts 15 are removed, and the elastic formwork 7 and the formwork 9 are removed. If the diameter, arrangement interval, etc. of the reinforcing bar 3 are the same, the elastic mold 7 can be diverted at another location.

  In the first embodiment described above, a plurality of elastic molds 7 that can be combined so as to form a reinforcing bar insertion hole 75 for inserting the reinforcing bar 3 are used, and the elastic mold 7 is connected to the reinforcing bar 3 by bolts 15 or the like. The rebar 3 can be fixed by the restoring force of the elastic mold 7 that is pressed to the side and compressed. As a result, it is possible to prevent the gap between the reinforcing bar 3 and the elastic mold 7 and to prevent the mortar content of the concrete from leaking out from the gap, thereby reducing the post-processing work and facilitating the construction of the side wall 1 and the like. It can be carried out. Further, the reinforcing bars 3 protruding in the substantially horizontal direction from the side wall 1 can be used for lap joints, and no threaded reinforcing bars or mechanical joints are required, so that joints can be formed at low cost.

  Further, since the diameter of the reinforcing bar insertion hole 75 that can be formed by combining the elastic mold 7 is smaller than the diameter of the reinforcing bar 3, the elastic mold 7 is deformed according to the size of the reinforcing bar 3 when the elastic mold 7 is pressed. Then, the elastic mold 7 and the reinforcing bar 3 are brought into close contact with each other by the restoring force, and it is possible to reliably prevent a gap from being generated between the elastic mold 7 and the reinforcing bar 3. Moreover, by making the elastic mold 7 made of rubber, the elastic mold 7 does not bite into the concrete, and the elastic mold 7 can be easily removed without performing chipping or the like.

  Moreover, in this embodiment, the elastic mold 7 is made of a substantially rectangular plate, so that the commonly used mold 9 is used on both sides of the elastic mold 7 and the molds 9 are connected to each other using bolts 15 or the like. It becomes possible to pressurize the elastic mold 7 by tightening the. When the elastic mold 7 is pressed, the elastic mold 7 and the mold 9 are also in close contact with each other, so that the mortar portion of the concrete does not leak from the gap between the elastic mold 7 and the mold 9.

  However, the present invention is not limited to this. For example, in this embodiment, the diameter of the reinforcing bar insertion hole 75 that can be formed by combining the elastic formwork 7 is smaller than the diameter of the reinforcing bar 3, but in some cases, these diameters may be the same size. In this embodiment, the bolt 15 is passed through the through hole 71 of the elastic mold 7, but the position of the bolt 15 can be variously determined as long as the elastic mold 7 can be pressed against the reinforcing bar 3.

  In the present embodiment, the elastic mold 7 is made of rubber. However, in some cases, an elastic member such as urethane foam can be used as the elastic mold 7. Furthermore, the formwork structure 10 of the present embodiment is not limited to the concrete joint portion of the side wall 1 and the floor slab 2, but can be applied as long as the reinforcing bar protrudes from the structure in a substantially horizontal direction.

  Hereinafter, another example of the present invention will be described as a second embodiment. The second embodiment will mainly describe differences from the first embodiment, and the same points will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted.

[Second Embodiment]
FIG. 6 is a view showing a formwork structure 10a according to the second embodiment. 6 (a) is a view showing the front of the mold structure 10a, as in FIG. 2 (a), and FIG. 6 (b) is a vertical sectional view along line BB in FIG. 6 (a). It is. The same applies to FIGS. 8 and 9 described later.

  The second embodiment differs from the first embodiment in that the elastic mold 4 and the auxiliary mold 5 are used in combination instead of the elastic mold 7 described above. That is, the formwork structure 10a according to the second embodiment includes the elastic formwork 4, the auxiliary formwork 5, the bolt 15, the nut 17, and the like.

  FIG. 7A shows the elastic mold 4. The elastic mold 4 is a member having a substantially arc-shaped cross section with a central angle of about 180 °, and is made of rubber. In this embodiment, when two elastic molds 4 are combined vertically so that the outer periphery thereof is substantially circular, the substantially circular reinforcing bar insertion for inserting the reinforcing bars 3 by the inner periphery of both elastic molds 4 is performed. A hole 41 can be formed.

  The diameter r2 of the reinforcing bar insertion hole 41 is smaller than the diameter of the reinforcing bar 3. However, when the elastic mold 4 is pressed and compressed as will be described later, the deformation thereof has a size suitable for the reinforcing bar 3 as shown in FIG. Reinforcing bar insertion hole 41 is formed. The reinforcing bar 3 is arranged so as to protrude from the reinforcing bar insertion hole 41.

  FIG. 7B is a view showing the auxiliary mold 5. The auxiliary mold 5 is provided with a rib 51 on one side of a substantially rectangular plate material and a substantially semicircular cutout portion 55 and a rib 57 on the opposite side, and is made of steel, for example. . Holes 53 and 59 are respectively formed in the ribs 51 and 57, and the positions of the holes 53 and 59 correspond to the top and bottom.

  In the present embodiment, two auxiliary molds 5 are used in combination up and down. These auxiliary molds 5 are arranged with the ribs 57 aligned with each other. At this time, the positions of the holes 59 of the ribs 57 of both auxiliary molds 5 correspond to each other, and the substantially circular holes are formed by the notches 55 of both auxiliary molds 5. 56 is formed. The hole 56 is for arranging the elastic mold 4 combined vertically, and its diameter r4 is smaller than the outer diameter r3 of the elastic mold 4 (see FIG. 7A) or the diameter r3. It is about the same.

  In the present embodiment, the diameter r4 of the hole 56 is slightly smaller than the diameter r3 of the outer periphery of the elastic mold 4 and, as described above, when the elastic mold 4 is pressurized and compressed as described later, the deformation is shown in FIG. It is assumed that the diameter of the outer periphery of the elastic mold 4 is a size that matches the hole 56 as shown.

  As shown in FIG. 6, in the formwork structure 10a, the formwork 9 is arrange | positioned at the upper side and the lower side of these auxiliary formwork 5 so that the upper and lower auxiliary formwork 5 may be pinched | interposed.

  These molds 9 are arranged with the ribs 91 aligned with the ribs 51 of the auxiliary mold 5. At this time, the positions of the holes 53 of the ribs 51 of the auxiliary mold 5 and the holes 93 of the ribs 91 of the mold 9 correspond to each other.

  The bolt 15 is passed through the holes 53 and 59 of the ribs 51 and 57 of each auxiliary mold 5 and the hole 93 of the rib 91 of each mold 9, and the nut 17 is tightened at the tip thereof. As a result, the upper and lower molds 9 and the auxiliary molds 5 are fastened together.

  In order to form the formwork structure 10a, as shown in FIGS. 8A and 8B, first, the auxiliary formwork 5 is placed on the ribs 91 of the lower formwork 9 by placing the ribs 51 thereon. Then, the outer periphery of the elastic mold 4 is placed on the notch 55 of the auxiliary mold 5, and the reinforcing bar 3 is disposed on the inner periphery of the elastic mold 4.

  Next, as shown in FIGS. 9A and 9B, the inner periphery of the elastic mold 4 is placed on the reinforcing bar 3, and the position of the notch 55 is aligned with the outer periphery of the elastic mold 4 to assist the auxiliary mold. 5 is arranged. Further, the mold 9 is arranged by placing the rib 91 on the rib 51 of the auxiliary mold 5.

  Then, the bolts 15 are passed through the holes 53 and 59 of the ribs 51 and 57 of the upper and lower auxiliary molds 5 and the holes 93 of the ribs 91 of the upper and lower molds 9, and the nuts 17 are tightened at the tips thereof, thereby 9 and the auxiliary mold 5 are tightened.

  As a result, the elastic mold 4 is pressed and compressed toward the reinforcing bar 3 as indicated by an arrow b in FIG. 6A, and the inner periphery of the elastic mold 4 is deformed according to the shape of the reinforcing bar 3. The reinforcing bar insertion hole 41 has a size that matches the size of the reinforcing bar 3, and the elastic frame 4 and the reinforcing bar 3 are in close contact with each other, and the gap between the elastic frame 4 and the reinforcing bar 3 is closed. When the elastic mold 4 is pressed, the outer periphery of the elastic mold 4 is also matched to the size of the hole 56 due to the deformation, and the elastic mold 4 and the auxiliary mold 5 are also in close contact.

  The subsequent procedure is the same as that described in the first embodiment. When removing the mold structure 10a, the nut 17 is loosened and the bolt 15 is removed, and the elastic mold 4, auxiliary mold 5, mold 9, and the like. Can be removed. The elastic formwork 4 can be diverted at another location if the diameter of the reinforcing bar 3 is the same, and the auxiliary formwork 5 is diverted at another location if the arrangement interval of the reinforcing bars 3 is the same. It is possible.

  In the second embodiment, the same effect as in the first embodiment can be obtained. In the second embodiment, the area occupied by the elastic mold 4 can be reduced and the rigidity of the entire mold structure 10a can be increased.

  In the present embodiment, the bolt 15 or the like is used as the pressurizing unit of the elastic mold 4, but the pressurizing unit is not limited to this. For example, the elastic mold 4 can be pressed against the reinforcing bar 3 side by sandwiching the ribs 57 of the upper and lower auxiliary molds 5 with clips or the like.

  In the second embodiment, two substantially arc-shaped elastic molds 4 having a central angle of about 180 ° are used. However, as shown in FIG. 10A, a substantially circular shape having a central angle exceeding 180 °. It is also possible to combine the arc-shaped elastic mold 4a and the substantially arc-shaped elastic mold 4a ′ having a central angle of less than 180 ° to form the reinforcing bar insertion hole 41 by the inner circumferences of both elastic molds 4a and 4a ′. Is possible. It is also possible in some cases to arrange three or more elastic molds so that the reinforcing bar insertion hole 41 is formed as a whole.

  The shape of the elastic mold is not particularly limited. For example, as shown in FIG. 10B, two substantially triangular elastic molds 4b can be combined to form a substantially rectangular outer periphery. A substantially semicircular cutout 43 is formed on one side of the elastic mold 4b. Two elastic molds 4b are arranged by aligning the sides, and the cutout 43 is put together to insert a substantially circular reinforcing bar. A hole 41 is formed.

  In this case, as shown in FIG. 10 (c), the shape of the notch 55 'of the auxiliary mold 5' is substantially triangular to match the elastic mold 4b, and the upper and lower auxiliary molds 5 'are combined. In this case, a substantially square hole 56 ′ for arranging the elastic mold 4b is formed. In this case, there is an advantage that the auxiliary mold 5 'can be easily manufactured as compared with the case where the cutout portion is substantially semicircular as described above. As described above, the shapes of the elastic formwork and the auxiliary formwork can be variously determined in consideration of workability and cost.

  In addition, although the formwork structure 10b of FIG. 11 (a) holds a plurality of reinforcing bars 3 arranged in the vertical direction, the auxiliary formwork 5 and the formwork 9 may be arranged on the left and right as shown in the figure. Is possible.

  In this example, as shown in FIG. 11 (b), the reinforcing bars 3 are arranged between the cutout portions 55 of the left and right auxiliary molds 5 so as to be sandwiched between the elastic molds 4. Bolts 15 are passed through the holes 53 and 59 of the ribs 51 and 57 and the holes 93 of the ribs 91 of the left and right molds 9, and the nut 17 is tightened at the tip thereof. By tightening the left and right auxiliary molds 5 and the molds 9 in this way, the elastic mold 4 is pressed to the reinforcing bar 3 side. This formwork structure 10b is effective when a vertical partition wall (second structure) is provided on the side of the side wall 1 (see FIG. 1).

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1,101; Side wall 2,105; Floor slab 3,21,103,103a; Reinforcing bar 4,4a, 4a ', 4b, 7; Elastic formwork 5,5'; Auxiliary formwork 9,109,121; 10, 10a, 10b; formwork structure 15; bolt 17; nuts 41, 75; rebar insertion holes 43, 55, 55 ', 73, 122; notches 51, 57, 91; ribs 53, 56, 56', 59 93; hole 71; through hole 107; mechanical joint 117; wire mesh

Claims (10)

When placing the concrete of the structure, it is a formwork structure used at a location where a reinforcing bar protrudes from the structure in a substantially horizontal direction,
A plurality of elastic molds that can be combined so that a reinforcing bar insertion hole for inserting the reinforcing bar is formed;
Pressurizing means for pressurizing the plurality of elastic molds to the reinforcing bar side;
The formwork structure characterized by comprising. The reinforcing bar insertion hole is substantially circular,
The formwork structure according to claim 1, wherein a diameter of the reinforcing bar insertion hole is smaller than a diameter of the reinforcing bar.   The formwork structure according to claim 1 or 2, wherein the elastic formwork is made of rubber. The elastic mold is a substantially rectangular plate material provided with a substantially semicircular cutout,
The formwork structure according to any one of claims 1 to 3, wherein the two reinforcing molds can be combined to form the reinforcing bar insertion hole by a cutout portion of both elastic molds. .   5. The mold structure according to claim 4, wherein the pressurizing unit is a binding material that pressurizes the elastic mold by fastening two molds provided between the elastic molds. .   The formwork structure according to any one of claims 1 to 3, further comprising a plurality of auxiliary formwork that can be combined so that holes for arranging the elastic formwork are formed.   The pressurizing means is a binding material that clamps two auxiliary molds that can be combined so that the holes are formed, and pressurizes the elastic molds arranged in the holes. The formwork structure according to claim 6. When a plurality of the elastic molds are combined so that the reinforcing bar insertion holes are formed, the outer periphery thereof is substantially circular,
The formwork structure according to claim 6 or 7, wherein the hole formed when a plurality of the auxiliary formwork is combined is substantially circular. When a plurality of the elastic molds are combined so that the reinforcing bar insertion hole is formed, the outer periphery thereof has a substantially rectangular shape,
The formwork structure according to claim 6 or 7, wherein the hole formed when a plurality of the auxiliary formwork is combined has a substantially square shape. The step of placing concrete of the first structure using the formwork structure according to any one of claims 1 to 9, wherein the reinforcing bar protrudes from the first structure in a substantially horizontal direction;
Removing the formwork structure after placing the concrete of the first structure;
A step of forming a second structure in which a reinforcing bar arranged so that a lap joint is formed between the reinforcing bar and the reinforcing bar is embedded in concrete;
A structure construction method characterized by comprising:

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