JP2017082399A - Insert fitting jig, fixture therefor, and insert embedding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insert fitting jig and an insert embedding method suited to a shield method.SOLUTION: An insert fitting jig 21 includes a cylindrical jig body 29 and a fixture 30. The jig body 29 includes a male screw part 14 on an end side and a female screw hole 31 on an inner periphery on the other end side. The fixture 30 is formed by fitting a fixing cover 35 on a fixture body 34, and the fixture body 34 includes a pair of leg parts 36, a male screw 37 provided on an outer periphery of each of the leg parts 36, and a cover receiving part 38 protruding in a width direction from other end of each of the leg parts 36 and then extending perpendicularly. Both leg parts 36 are deformed in an inward direction when both cover receiving parts 38 are pressed, causing the fixture body 34 to contract and be deformed in the width direction and the female screw hole 31 to separate from the male screw 37, thereby enabling disengagement of the female screw hole 31 and the male screw 37.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a jig to be attached to a mold when an insert for fixing a member to be fixed is embedded in a concrete structure, a fixture for fixing the jig to the mold, and a method for burying an insert using the jig. About.

  As is well known, the shield method is often used for tunnel construction in subways, roads, sewers, underground waterways, underground rivers and the like. In this shield method, a shield tunnel is constructed by excavating the ground with a shield machine and simultaneously lining with a segment at the rear of the shield machine.

  This segment is an arc-shaped block assembled as a lining, and the lining is performed by assembling the segment and covering the tunnel inner wall excavated by a shield machine in an arch shape. In this segment, an insert is embedded to fasten a desired fixed member.

  Patent document 1 is well-known as an example of this insert. Referring to FIG. 12, the insert 1 includes an insert body 3 in which a female screw hole 2 is formed, and sleeves 5a and 5b in which communication holes 4a and 4b communicating with the female screw hole 2 are formed in the axial direction. A plastic holder (attachment jig) 8 is detachably attached to the mold 6. The plastic holder 8 includes a male screw portion 9 formed at one end portion and a stopper 10 formed at the other end portion.

  The stopper 10 includes a pair of stopper pieces 10a that can be elastically deformed and a nut hole 10c for removal that is formed in the most distal end 10b. The nut hole 10c is formed in a hexagonal hole having a hexagonal cross section, and an end of a hexagonal bar wrench (not shown) can be fitted therein.

  When the insert 1 is embedded in the segment, first, the male screw portion 9 is passed through the communication holes 4 a and 4 b and fastened to the female screw hole 2, and then the stopper 10 is inserted into the mounting hole 7 of the mold 6. At this time, the mold 6 is sandwiched between the stopper piece 10 a and the sleeve 5 b, and the insert 1 is attached to the mold 6.

  Next, with the insert 1 attached to the mold 6, the insert 1 is inserted into the concrete (segment) before curing from the insert body 3 side. Thereafter, the end of the hexagon stick wrench is fitted into the nut hole 10c, and the plastic holder 8 is removed by rotating the hexagon stick wrench in one direction.

JP 2003-27597 A

  In the burying of the insert 1 using the plastic holder 8 of Patent Document 1, the following problem may occur. The same problem arises when a general method for embedding the insert 1 is used, for example, when embedding from the outside of the mold 6 with a steel hexagon head bolt.

  (1) In tunnel construction by the shield method, the plastering of the segment surface is often performed before the concrete is hardened, and the plastic holder 8 must be removed before the plastering.

  Therefore, the removal work of the plastic holder 8 is performed when the concrete is in a semi-dry state, and the insert 1 may be displaced from the original embedding position by the rotation of the hexagon wrench rod, or may be embedded in an inclined state. There is. In addition, it is difficult to remove the plastic holder 8 or the like due to the rotation of the insert 1 and the workability may be deteriorated.

  Therefore, at present, the insert body 3 is provided with a resistance blade (not shown), but the resistance blade is also embedded together with the insert 1, so that the amount of foreign matter in the concrete is increased and the concrete strength is increased. There is a risk of lowering, which is not preferable.

  (2) Since the female screw hole 2 and the communication holes 4a and 4b are not exposed after the plastic holder 8 is removed, the holes 2, 4a and 4b may be clogged with dust and dirt when the fixed member is not fastened immediately. There is a risk of deterioration. This makes it difficult to fasten the fixed member at a later date.

  This invention is made in order to solve such a problem, and makes it a solution subject to provide the jig for an insert attachment suitable for the tunnel construction of a shield method, and the embedding method of an insert.

  One aspect of the present invention relates to a jig for attaching an insert to a formwork when an insert to which a member to be fixed is fixed is embedded in a concrete structure. The jig includes a jig body in which a male thread portion fastened to the female thread portion of the insert is formed on one end side, and a fixture that fixes the jig body to the mold frame. Comprises a fixture main body that is inserted into the other end of the jig main body and can be freely reduced and deformed in the width direction, and a fixing lid that is attached to the fixture main body and regulates the reduction deformation. The fixture main body is inserted into the other end of the jig main body with the fixed lid attached, and if the fixed lid is removed and reduced and deformed, the inner circumference of the other end of the jig main body is obtained. And the insertion is released.

  According to another aspect of the present invention, when an insert embedded in a concrete structure is attached to a formwork via a mounting jig, the male thread portion formed on the jig body of the mounting jig is replaced with the female thread portion of the insert. It is related with the fixture which fixes this jig | tool main body to the said formwork in the state fastened to. The fixture includes a fixture body that is inserted into the other end of the jig body and can be reduced and deformed in the width direction, and a fixing lid that is attached to the fixture body and restricts the reduction and deformation. The fixture body is inserted into the other end of the jig body with the fixed lid attached, and the fixture body can be removed from the jig body by removing the fixed lid and reducing the deformation. It is separated from the inner periphery of the end, and the insertion is released.

  Still another embodiment of the present invention relates to a method of embedding an insert for fixing a member to be fixed to a concrete structure in the concrete structure using the mounting jig. This method includes a step of fastening a female screw portion of the insert to a male screw portion of the jig main body, attaching the jig main body to the insert, and through a mounting hole of the mold in a state where the fixing lid is attached. Inserting the fixture body into the other end of the jig body, fixing the jig body to the mold, and curing the insert attached to the mold via the mounting jig Inserting and embedding in the previous concrete, removing the fixing lid from the fixture body, reducing the deformation of the fixture body from the inner periphery of the other end of the jig body, and releasing the insertion And a step of removing the formwork.

  The method includes a step of fastening a female screw portion of the insert to a male screw portion of the jig main body, attaching the jig main body to the insert, and through a mounting hole of the mold in a state where the fixing lid is attached. , A step of screwing a male screw of the fixture main body into a female screw of the jig main body, fixing the jig main body to the mold, and an insert attached to the mold via the mounting jig Inserting and embedding in the concrete before hardening, removing the fixing lid from the fixture body, reducing the deformation of the fixture body, separating the male screw from the female screw, releasing the screw and And a step of removing the formwork.

  ADVANTAGE OF THE INVENTION According to this invention, the jig for attachment of an insert suitable for the tunnel construction of a shield method, and the embedding method of an insert can be provided.

The longitudinal cross-sectional view of the jig | tool for insert attachment which concerns on embodiment of this invention. (A) is a side view of the jig main body of the mounting jig, and (b) is an AA cross-sectional view of (a). (A) is a front view of the fixture of the mounting jig, (b) is a BB cross-sectional view of (a). (A) is a side view of the fixture, and (b) is a sectional view taken along the line CC in (a). The perspective view of the state which removed the fixing lid of the fixing tool. The perspective view of the molded object of the fixing tool. (A) is a perspective view showing a step of bending the molded body of FIG. 6, (b) is a perspective view showing a step of attaching a fixing lid, (c) is a perspective view after completion of the steps shown in (a) and (b). . (A) is a longitudinal sectional view showing the process of attaching the jig body to the insert, (b) is a longitudinal sectional view showing the process of attaching the fixture to the jig body, and (c) is before curing in the state of (b). The longitudinal cross-sectional view which shows the process inserted in concrete. (A) is a longitudinal sectional view showing a step of removing the fixing lid from the fixture body, (b) is a longitudinal sectional view showing a step of pressing the fixture body, and (c) is a step of removing the fixture from the jig body. The longitudinal cross-sectional view which shows, (d) The longitudinal cross-sectional view which shows the process of removing a formwork. (A) is a longitudinal cross-sectional view which shows the state which cancels | releases fastening with a jig | tool main body and an insert with a hexagon stick wrench, (b) is a longitudinal cross-sectional view which shows the state which removes a jig | tool main body. The longitudinal cross-sectional view of a shield tunnel. The longitudinal cross-sectional view of the insert of patent document 1. FIG.

  Embodiments of the present invention will be described below. Here, the insert is assumed to be embedded in a shield tunnel segment (arc-shaped concrete block) constructed mainly by the shield method.

  For example, in the case of the shield tunnel 15 for a road tunnel shown in FIG. 11, fixed members such as a floor slab bracket 18 and a lighting 19 can be fixed to the insert 17 embedded in the segment 16.

≪Example of insert mounting jig configuration≫
A configuration example of the insert mounting jig will be described with reference to FIGS. As shown in FIG. 1, the mounting jig 21 detachably attaches the insert 17 to a metal mold 22 when the ceramic insert 17 is embedded in the segment 16.

  The insert 17 includes an egg-shaped insert body 24 in which a female screw hole 23 is formed, a tubular sleeve 26 in which a communication hole 25 communicating with the female screw hole 23 is formed in the inner axial direction, and an open end portion of the sleeve 26. And an annular seal portion (for example, a rubber seal) 27 fixed to the substrate by bonding or the like. The mold 22 is curved according to the segment 16, a mounting hole 28 for mounting the insert 17 is formed therethrough, and a seal portion 27 is pressed and sealed to the inner peripheral edge of the mounting hole 28.

  The mounting jig 21 includes a cylindrical jig body 29 and a fixture 30 that attaches the jig body 29 to the mold 22. The both 29 and 30 are preferably made of resin, but the material is not particularly limited.

As shown in FIGS. 1 and 2 (a) and 2 (b), the jig main body 29 includes a male screw portion 14 on one end side screwed into a female screw hole 23, a flange 20 on the outer periphery of the other end, and the like. A female screw hole 31 on the inner periphery of the end and a hexagonal hole 32 communicating with the female screw hole 31 are provided. The hexagonal hole 32 is disposed on one end side of the female screw hole 31. The hexagonal hole 32 is formed in a hexagonal cross section, and the end 50a of the hexagonal bar wrench 50 shown in FIG.

  As shown in FIG. 1, the fixture 30 includes a fixture body 34 that is bent in a substantially V shape, and a fixing lid 35 that is detachably attached to the fixture body 34. As shown in FIGS. 3 (a) and 3 (b), the fixture main body 34 has a pair of leg portions 36 connected at one end to each other, a male screw 37 formed on the other end side of the outer surface of the leg portion 36, And a pair of lid receiving portions 38 that extend in the width direction from the other end of the leg portion 36 and extend in the opposite direction of the leg portion 36, and the male screw 37 can be screwed (fastened) into the female screw hole 31. ing.

  Further, the one lid receiving portion 38 and the fixed lid 35 are connected by a connection portion 39 in FIG. Further, the connecting portion 45 that connects the one end portions of the both leg portions 36 is thinner than the both leg portions 36 because an arcuate curvature is provided on the inner peripheral side.

  As shown in FIGS. 3 (a) and 3 (b), the fixed lid 35 includes a disc-like lid 40 that is placed on the upper end portions 38a of the lid receiving portions 38 and closes between the upper end portions 38a. 40 is provided with a fitting portion 41 erected in a convex shape in the longitudinal section at the center of the closing surface (inner surface). As shown in FIG. 4B, the fitting portion 41 includes a base portion 42 formed at the center of the closing surface of the lid body 40, and a cylindrical shape that projects from the center of the bottom portion of the base portion 42 in the opposite direction to the lid body 40. The tip part 44 is provided.

  As shown in FIG. 4 (b), the base portion 42 has a vertical U-shape with a cutout hole 43 continuous from the lid body 40. Here, the base portion 42 is fitted between the lid receiving portions 38 and placed on the bottom portion 38b of each lid receiving portion 38, while the distal end portion 44 is fitted between the leg portions 36 through the lid receiving portions 38. doing. At this time, a guide groove 46 is formed on the other end side of the inner surface of each leg portion 36, that is, on the inner side of the male screw 37, for guiding and inserting the tip portion 44. Here, the insertion of the distal end portion 44 between the leg portions 36 is regulated by the base portion 42 abutting against the bottom portion 38b. In this respect, the bottom portion 38b functions as a stopper for the fitting portion 41.

  Then, as shown by an arrow Q in FIG. 5, if the fixing lid 35 is removed from the fixture main body 34, both the leg portions 36 are deformed in the direction of the arrow P (inward direction) in FIG. Further, the fixing tool main body 34 can be reduced and deformed in the width direction. As a result, the male screw 37 is separated from the female screw hole 31, and the screwing (fastening) of both the members 31 and 37 is released.

≪Insert mounting method≫
Hereinafter, a method for embedding the insert 17 using the mounting jig 21 will be described. Here, the insert 17 is embedded in the segment 16 of the shield tunnel 15 through the following work steps A to D.

(1) Work process A
The work process A will be described with reference to FIGS. This work process A shows a preparatory process before the burying work of the insert.

  That is, the fixture 30 is provided to a construction site such as the shield tunnel 15 in the state of the molded body 30a of FIG. The fixture body 34 of the molded body 30a has an I-shape, both leg portions 36 are opened at about 180 degrees, and a connection portion 39 extends substantially horizontally from the upper end of one lid receiving portion 38. The lid 40 is connected.

  In this work process A, as shown in FIG. 7A, first, stress in the direction of arrow R is manually applied to both lid receiving portions 38 of the molded body 30a to be bent into a substantially V shape. It is set as the state of the fixture main body 34 of b). At this time, since the connecting portion 45 is thinner than the leg portion 36, the connecting portion 45 is easily bent around the connecting portion 45.

  Next, as shown by an arrow S in FIG. 7B, a fixing lid 35 is attached to the fixing tool main body 34. Here, the distal end portion 44 of the insertion portion 41 is inserted between the guide grooves 46 until the base portion 42 contacts the bottom portion 38 b of the lid receiving portion 38. As a result, the base portion 42 is placed on the bottom portion 38 b of the both lid receiving portions 38, and the upper end portion 38 a of the both lid receiving portions 38 is closed by the lid body 40.

  In this case, since the distal end portion 44 of the fitting portion 41 is fitted between the guide grooves 46, the deformation of both the leg portions 36 in the direction of arrow P shown in FIG. As a result, the male screw 37 of both the leg portions 36 can function as a “screw”. By attaching the fixing lid 35, the fixing tool 30 is completed as shown in FIG. 7C, and the preparatory step before the insert burying is completed.

(2) Work process B
The work process B will be described with reference to FIG. This work process B shows a process in which the insert 17 is attached to the mold 22 and embedded in concrete.

  First, the process of attaching the jig body 29 to the insert 17 will be described with reference to FIG. Here, the male screw portion 14 of the jig main body 29 is opposed to the opening of the seal portion 27, and the male screw portion 14 is turned into the female screw as shown by the arrow A-2 while rotating the jig main body 29 in the arrow A-1 direction. The holes 23 are screwed and the both 23 and 14 are fastened.

  Next, a process of attaching the jig body 29 to the mold 22 will be described with reference to FIG. Here, as shown by the arrow B-2, both the leg portions 36 of the fixture main body 34 are inserted into the attachment holes 28 from the outside of the mold 22, and then the fixture main body 34 is rotated in the arrow B-1 direction. The male screw 37 is screwed into the female screw hole 31. As a result, the male screw 37 is screwed into the female screw hole 31, and both 31 and 37 are fastened.

  As a result, the mold 22 is sandwiched between the seal portion 27 and the lid receiving portion 38, and the jig main body 29 is attached to the mold 22, whereby the insert 17 is attached to the mold 22 via the jig main body 29. It is attached. At this time, by increasing or decreasing the screwing amount of the male screw 37 into the female screw hole 31, it is possible to sufficiently cope with the difference in thickness due to the standard and dimensional error of the mold 22.

  After the attaching process to the mold 22, as shown by an arrow C in FIG. 8C, the insert 17 is inserted into the segment 16 before curing (preferably the segment 16 immediately after placement) from the insert body 24 side. Buried.

(3) Work process C
The work process C will be described with reference to FIG. This operation process C shows a process of removing the mold 22 and is performed in a semi-dry state before the segment 16 is cured. First, as shown in FIG. 9A, an operation of removing the fixing lid 35 from the fixture main body 34 is performed. In that case, a finger may be put on the outer peripheral edge of the lid body 40 between the lid receiving portions 38 and lifted in the arrow D direction.

  Next, as shown in FIG. 9B, both lid receiving portions 38 are pressed in the direction of arrow E, and both leg portions 36 are deformed in the direction of arrow P in FIG. As a result, the male screw 37 is separated from the female screw hole 31, and the screwing (fastening) of both the members 31 and 37 is released. If it is lifted in the direction of arrow F in FIG. 9C in this state, the fixture 30 is removed from the jig body 29, and the mold 22 can be removed as shown by the arrow G in FIG. 9D. It becomes.

  That is, when the screwing (fastening) between the male screw 37 and the female screw hole 31 is released, both the lid receiving portions 38 may be pressed in the direction of the arrow E and simultaneously lifted in the direction of the arrow F. There is no need to rotate in the opposite direction of -1.

  Therefore, according to the mounting jig 21, there is no possibility that the insert 17 is embedded out of the original embedding position or embedded in an inclined state, and the workability is deteriorated due to the rotation of the insert 17. Nor.

  As a result, there is no need to provide resistance wings or the like on the insert 17 as in the prior art, and in this respect, the amount of foreign matter in the concrete can be reduced, which can contribute to prevention of a decrease in concrete strength. In this sense, it is possible to provide an insert mounting jig and an insert embedding method suitable for tunnel construction by the shield method.

  Note that the jig body 29 can be used as the remaining lid of the insert 17 after the mold 22 is removed. As a result, it is possible to prevent dust and dirt from entering the female screw hole 23 and the communication hole 25, and to prevent the deterioration of both 23 and 25.

(3) Work process D
The work process D will be described with reference to FIG. This work process (D) shows the removal process of the jig main body 29 when fixing the member to be fixed to the insert 17 and is not performed when the jig main body 29 is used as the remaining lid.

  Here, as shown by an arrow H-1 in FIG. 10A, the end 50a of the hexagon stick wrench 50 is inserted into the hexagon hole 32 through the female screw hole 31. In this state, the hexagon wrench 50 is rotated in the direction of arrow H-2 to release the fastening between the male screw portion 14 and the female screw hole 23.

  As a result, the jig body 29 can be removed from the insert 17 as indicated by an arrow I in FIG. After the jig main body 29 is removed, a male screw portion of a desired fixed member can be fastened to the female screw hole 23 to fix the fixed member.

≪Other examples≫
The present invention is not limited to the above-described embodiment, and can be implemented by being modified within the scope described in each claim. An example is shown below.

  (1) The work process A can be omitted if it is provided to the construction site in a completed state of the fixture 30 shown in FIG. In this case, it is not necessary to provide the connection portion 45 with an arcuate shape, and it is not necessary to make the connecting portion 45 thinner than the two leg portions 36 in this respect.

  (2) The female screw hole 31 of the jig main body 29 and the male screw 37 of the fixture 30 may be eliminated, and a hole may be simply formed at the other end of the jig main body 29. In this case, if the fixing lid 35 is attached to the fixture main body 34 and the both leg portions 36 are inserted into the hole portions, the both leg portions 36 are inserted into the hole portions.

  On the other hand, if the fixed lid 35 is removed, the both leg portions 36 can be deformed in the direction of the arrow P in FIG. 5, so that the insertion can be released. At this time, the hexagonal hole 32 may be formed in communication with one end side of the hole.

  (3) Instead of the hexagonal hole 32, a square hole having a square cross section may be formed in communication with the female screw hole 31 on the inner periphery of the other end of the jig body 29. In this case, if the square bar wrench is inserted through the female screw hole 31 instead of the hexagonal bar wrench 50, the fastening between the male screw portion 14 and the female screw hole 23 can be released.

  (4) In the fixture main body 34, both the leg portions 36 do not have to be formed in a substantially V-shaped bifurcated shape, and one end of each of the plurality of leg portions 36 may be connected to each other. Further, the tip portion 44 of the fitting portion 41 may be in a shape that can be fitted between the guide grooves 46, and is not limited to a cylindrical shape, and may be, for example, a cone shape (such as a cone shape).

15 ... Shield tunnel (concrete structure)
16 ... Segment 17 ... Insert 21 ... Mounting jig 23 ... Female thread hole (Female thread part)
29 ... Jig body 30 ... Fixing tool 31 ... Female thread hole (Female thread)
32 ... Hexagonal hole (polygonal hole)
34 ... Fixing tool body 35 ... Fixing lid 36 ... Leg part 37 ... Male screw 38 ... Lid receiving part 40 ... Lid body 41 ... Insertion part 45 ... Connection part 46 ... Guide groove (groove part)
50 ... Hexagonal bar wrench (polygonal bar wrench)
50a ... End of hexagon stick wrench (end of polygon wrench)

Claims (11)

A jig for attaching the insert to the formwork when the insert to which the member to be fixed is fixed is embedded in a concrete structure,
A jig body in which a male thread portion fastened to the female thread portion of the insert is formed on one end side, and a fixture for fixing the jig body to the mold,
The fixture includes a fixture body that is inserted into the other end of the jig body and can be freely deformed in a width direction, and a fixing lid that is attached to the fixture body and restricts the reduction deformation. Prepared,
While the fixture body is inserted into the other end of the jig body with the fixed lid attached,
If the fixed lid is removed and the deformation is reduced, the insert mounting jig is separated from the inner periphery of the other end of the jig body and the insertion is released. While an internal thread is formed on the inner periphery of the other end of the jig body,
A male screw that is screwed onto the female screw is formed on the fixture body,
2. The insert mounting according to claim 1, wherein when the fixing main body is deformed in a reduced size, the male screw is separated from the female screw, and insertion into the other end by the screwing is released. jig. The fixture main body includes a plurality of legs connected to one end of each,
The male screw formed on the outer surface of each leg,
A lid receiving portion extending from the other end of each leg,
The insert mounting jig according to claim 2, wherein if the both lid receiving portions are pressed, the leg portions are deformed inwardly and the fixture main body is contracted and deformed in the width direction. The fixed lid includes a lid that closes between the upper ends of the lid receivers, and a fitting portion that is formed on the closed surface side of the lid,
The insert fitting jig according to claim 3, wherein the fitting portion is fitted between the leg portions when the fixing lid is attached to the fixture main body.   The insert mounting jig according to claim 4, wherein a groove portion that guides and inserts the insertion portion is formed on an inner surface of each leg portion.   6. The insert mounting jig according to claim 3, wherein a connecting portion that connects one end of each of the leg portions is thinner than the leg portion. The jig body includes a polygonal hole into which an end of a polygonal bar wrench can be inserted on one end side of the female screw,
The insert mounting jig according to any one of claims 2 to 6, wherein the fastening is released when the polygonal bar wrench is inserted into the polygonal hole and rotated in one direction. When attaching an insert embedded in a concrete structure to a formwork via a mounting jig,
A fixing tool for fixing the jig body to the formwork in a state in which the male screw part formed on the jig body of the mounting jig is fastened to the female screw part of the insert,
A fixture main body that is inserted into the other end of the jig main body and can be freely reduced and deformed in the width direction; and a fixing lid that is attached to the fixture main body and restricts the reduction deformation.
While the fixture body is inserted into the other end of the jig body with the fixed lid attached,
When the fixing lid is removed and the deformation is reduced, the jig is moved away from the inner periphery of the other end of the jig body, and the insertion is released. An insert for fixing a member to be fixed to a concrete structure is a method of embedding in the concrete structure using the insert mounting jig according to claim 1,
Fastening the female thread part of the insert to the male thread part of the jig body, and attaching the jig body to the insert;
Inserting the fixture body into the other end of the jig body through the mounting hole of the mold in a state where the fixing lid is attached, and fixing the jig body to the mold; and
Inserting the insert attached to the formwork via the mounting jig into the uncured concrete and burying it,
Removing the fixing lid from the fixture main body, causing the fixture main body to be reduced and deformed to be separated from the inner periphery of the other end of the jig main body, releasing the insertion, and removing the formwork;
A method of embedding an insert, comprising: An insert for fixing a member to be fixed to a concrete structure is a method of embedding in the concrete structure using an insert mounting jig according to claim 2 or 3,
Fastening the female thread part of the insert to the male thread part of the jig body, and attaching the jig body to the insert;
Fixing the jig main body to the mold by screwing the male screw of the fixture main body to the female screw of the jig main body through the mounting hole of the mold in a state where the fixing lid is attached;
Inserting the insert attached to the formwork via the mounting jig into the uncured concrete and burying it,
Removing the fixing lid from the fixture main body, reducing the deformation of the fixture main body, separating the male screw from the female screw, releasing the screwing, and removing the mold;
A method of embedding an insert, comprising: Inserting the end of a polygonal bar wrench into a polygonal hole formed on one end of the female screw, and rotating the polygonal bar wrench in one direction to release the fastening;
The method of embedding an insert according to claim 10, further comprising:

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