JP6802976B2 - Structure manufacturing method - Google Patents

Description

This invention relates to the production how structures.

When constructing a building, reinforcing bars inserted in construction members are joined by joints (sleeve or pipe). Among such joints, there are those in which the joint strength with the reinforcing bar is increased by forming a plurality of irregularities on the inner surface (see, for example, Patent Documents 1, 2 and 3).

Japanese Unexamined Patent Publication No. 8-49356 Japanese Unexamined Patent Publication No. 7-279314 Japanese Unexamined Patent Publication No. 6-129058

However, in order to manufacture the joint of Patent Document 1 and the like, a complicated process for forming a plurality of irregularities on the inner surface is required. Further, such a joint can only be manufactured with a thick wall.

The present invention has been made in view of the above, can be easily manufactured, and an object thereof is to provide a manufacturing how structures having small size and light weight and high bonding strength.

In order to achieve the above object, the method for manufacturing a structure according to the first aspect of the present invention is:
A tubular joint made of a fiber sheet impregnated with the cured resin is formed by curing the resin while winding a fiber sheet impregnated with the resin around the side surface of the shaft rod having a plurality of irregularities. The first step to create and
And out vent from one end of the joint halfway the axle, the first through hole is provided on a position corresponding to an end of the shaft rod in the side walls of the joint, the axle at the sidewall of the joint A second step of providing a second through hole at a position corresponding to the back side that is not inserted , and
A third step of sealing the adhesive in the joint and fixing the first bar to the joint with the first bar for bending reinforcement inserted from the other end of the joint.
A fourth step of completely extracting the shaft rod from one end of the joint, and
A fifth step of fixing the joint and the first bar to a wood-based or concrete construction member in a state where one end of the joint can insert a joining rod for joining with another construction member. When,
including.

Prior to the first step,
A sixth step of forming the shaft rod by winding a tape having a plurality of irregularities formed in a mesh shape and having non-adhesiveness to the resin on the side surface of the core rod whose radius can be adjusted is included.
In the second step,
The radius of the core rod is shortened, and the shaft rod is pulled out.
It may be that.

Prior to the first step,
A seventh step of forming a spiral threaded groove on the side surface of the shaft rod is included.
In the second step,
The shaft rod is pulled out while rotating the shaft rod with respect to the joint along the thread groove.
It may be that.

The fifth step is
Eighth steps of aligning the first through hole of the joint with the third through hole made in the construction member to which the joint is fixed include.
A ninth step of inserting a second bar for joining with another construction member from one end of the joint, and
A tenth step of injecting an adhesive through the first and third through holes to fix the joint and the second bar material, and
including,
It may be that.

According to the present invention, a tubular joint is formed by a simple method of winding a fiber sheet impregnated with a resin around a shaft rod having a plurality of irregularities formed on the side surface to cure the resin. Further, since this joint is made of a fiber sheet, it is small and lightweight. Further, since a plurality of irregularities are formed on the inner surface of the joint, a high bonding force can be obtained between the joint and the rod material to be inserted inside.

It is a figure which shows the appearance of the joint and the bar material which concerns on Embodiment 1 of this invention. It is the figure which looked at the joint and the bar material from the longitudinal direction. It is a figure which shows the state which two bar members are joined to a joint. It is sectional drawing of the joint seen from the longitudinal direction. It is sectional drawing of the joint along the longitudinal direction. It is sectional drawing which saw from the side surface extending in the longitudinal direction of the construction member in which a joint is incorporated. It is the figure which looked at the construction member from the longitudinal direction. It is sectional drawing which shows a part of the joint inserted in the construction member. It is a flowchart (the 1) of the manufacturing method of a joint, a construction member and a structure. It is a flowchart (No. 2) of the manufacturing method of a joint, a construction member and a structure. It is a perspective view of the core rod used for manufacturing a joint. P.I. P. It is a figure which shows the state which the tape was wound. It is a figure which shows the state which wound the fiber sheet with the axial direction as the direction of a fiber around a shaft rod. It is a figure which shows the state which wound the fiber sheet with the circumferential direction as the direction of a fiber around a shaft rod. It is a figure which shows the joint wound around the shaft resorcinol resin rod. It is a figure which shows the state which reduced the radius of the shaft rod. It is a figure which shows the state that the shaft rod was pulled out halfway. It is a figure which shows the state that the bar material was inserted into a joint. It is a figure which shows the appearance that the adhesive layer was formed between a bar material and a joint. It is a figure which shows the state that the shaft rod was completely pulled out. It is a figure which shows the state that the joint and the bar material were inserted into the groove part of a flat plate, and were fixed. It is a perspective view which shows two construction members and a joining rod material which joins them. It is a figure which shows the state which the joint bar material is inserted into one construction member. It is a top view which shows the state which the joint bar material is inserted into both construction members. It is a perspective view which shows the state which the joint bar material is inserted into both construction members. It is a figure which shows the state which the adhesive is injected into the joined construction member. It is a figure which shows the state (before joining) which joins two construction members as a beam through a column. It is a figure which shows the state (after joining) which joins two construction members as a beam through a column. It is a perspective view which shows the structure of the shaft rod and the joint used for manufacturing the joint which concerns on Embodiment 2 of this invention. It is a figure which shows the example (the first, before joining) which joins a reinforced concrete foundation and a construction member. It is a figure which shows the example (the first, after the joining) which joins a reinforced concrete foundation and a construction member. It is a figure which shows the example (the second, before joining) which joins a reinforced concrete foundation and a construction member. It is a figure which shows the example (the second, after joining) which joins a reinforced concrete foundation and a construction member.

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

Embodiment 1.
As shown in FIG. 1A, the joint 1 is a tubular joint member (sleeve) extending in one direction. The joint 1 is a carbon fiber pipe made of reinforced plastic of carbon fiber. The joint 1 joins the bar 2 and the bar 3. The bars 2 and 3 are, for example, deformed reinforcing bars.

As shown in FIG. 1B, the joint 1 is an annular joint. The rods 2 and 3 are columnar rods. The diameter of the inner pipe of the joint 1 is about 2 to 3 mm larger than the radius of the rods 2 and 3.

As shown in FIG. 1C, the joint 1 joins the bar 2 and the bar 3 by inserting the bar 2 and the bar 3 inside the pipe from both ends and further sealing the adhesive. .. The joint 1 can be formed by a simple manufacturing method, is compact and lightweight, and provides a high joining force between the bar 2 and the bar 3. Hereinafter, the configuration and the manufacturing method will be described.

As shown in FIGS. 2A and 2B, the joint 1 is composed of two fiber layers 1A and 1B.

The fiber layer 1A is formed by winding a carbon fiber sheet impregnated with a resin in an annular shape and curing the resin. The carbon fiber sheet is wound with the fiber direction as the axial direction of the joint 1. This fiber sheet is wound in, for example, four layers.

The fiber layer 1B is formed by winding a carbon fiber sheet impregnated with a resin in an annular shape and curing the resin. The carbon fiber sheet is wound with the fiber direction as the circumferential direction of the joint 1. This fiber sheet is wound into, for example, four rolls.

As shown in FIG. 2A, an adhesive layer 4 formed by filling an adhesive is formed between the bar 2 and the joint 1 (fiber layer 1A). The joint 1 and the bar 2 (or the bar 3) are joined via the adhesive layer 4. As shown in FIG. 2B, the bar 2 and the bar 3 are axially connected by a joint 1.

Since the joint 1 is composed of the fiber layers 1A and 1B, it is very small and lightweight. Further, since the fiber layers 1A and the fiber layer 1B have different fiber directions, the joint 1 can be strengthened against forces in all directions such as axial tensile force and compressive force, so that the strength of the joint 1 can be increased. Can be improved.

As shown in a partially enlarged manner in FIGS. 2A and 2B, a plurality of irregularities are formed on the innermost side of the fiber layer 1A, that is, on the inner side surface of the joint 1. Due to this unevenness, the contact area between the joint 1 and the adhesive layer 4 can be increased, and the joint strength of the inserted rods 2 and 3 can be dramatically increased. For example, due to the presence of unevenness, the pulling force from which the reinforcing bar rods 2 and 3 come off from the joint 1 can be increased to a level at which the reinforcing bar rods 2 and 3 yield. Further, the unevenness of the inner wall surface of the joint 1 is also effective against the compressive stress transmitted through the rods 2 and 3. That is, the force that causes compressive yield can be dramatically increased.

As shown in FIG. 2B, the joint 1 is provided with two through holes 10 through which the inside and the outside of the pipe are inserted. The through hole 10 is formed near the ends of the rod members 2 and 3. The through hole 10 is provided for inserting the adhesive into the pipe and discharging the air in the pipe to the outside.

As shown in FIG. 3A, the joint 1 is used in a form incorporated in the construction member 100. The construction member 100 is a wood-based square lumber made of laminated lumber or lumber. As shown in FIGS. 3A and 3B, the construction member 100 is provided with about six elongated holes 50 extending in the longitudinal direction thereof. A bar 2 (deformed reinforcing bar) for bending and reinforcing the construction member 100 is inserted into each elongated hole 50. The joint 1 is incorporated in the vicinity of both ends of the same elongated hole 50. The end of the bar 2 is halfway inserted into the joint 1. The joint 1 is fixed to the construction member 100 in a state where the other end can insert a joining rod 3 for joining with another construction member 100, that is, in a state where the elongated hole 50 is opened to the outside. There is.

As shown in FIG. 3C, the bar member 2 is inserted into the joint 1 inserted into the construction member 100 up to the front of the through hole 10 on the upper left side. The bar 2 is fixed to the joint 1 via an adhesive layer 4 made of an adhesive. In the joint 1, the left side of the through hole 10, that is, the portion where the bar 2 is not inserted, remains hollow.

Next, a method of manufacturing the joint 1, a method of manufacturing the construction member 100, and a method of manufacturing a structure using the construction member 100 according to the embodiment of the present invention will be described. 4 and 5 show the flow of these manufacturing methods.

As shown in FIG. 4, first, a core rod is created (step S1). As shown in FIG. 6A, the core rod 6 is composed of a vinyl chloride circular tubular pipe 7 and a long piece 8. A part of the pipe 7 is cut along the axial direction (longitudinal direction), and the long piece 8 can be inserted into the cut portion. When the long piece 8 is inserted into the pipe 7, the radius of the core rod 6 becomes a predetermined size, and when the long piece 8 is retracted from the pipe 7, the radius of the core rod 6 is larger than that when the long piece 8 is inserted. Also becomes smaller. The side surface of the pipe 7 does not have adhesiveness with the resin impregnated in the fiber sheet. The end of the core rod 6 on the side shown in the drawing is open, but the end portion of the core rod 6 on the side not shown is a closed flat surface.

Subsequently, as shown in FIG. 6B, P.I. P. A tape such as the tape 9 and the transparent tape 11 is wound around the core rod 6 (step S2). First, the transparent tape 11 is spirally wound around the core rod 6 so as to overlap each other by about 5 mm. The transparent tape 11 has an adhesive surface on the outside. On the transparent tape 11, P.I. P. Tape 9 is wound. P. The P tape 9 is in a state of being adhered to the transparent tape 11. P. P. The tape 9 is spirally wound around the side surface of the core rod 6 so that the front and back do not overlap. P. P. A plurality of irregularities are formed in a mesh shape on the surface of the tape 9. In this embodiment, in steps S1 and S2, a plurality of irregularities are formed in a mesh shape on the side surface of the core rod 6 whose radius can be adjusted, and P.I. P. By winding the tape 9, it corresponds to the sixth step of producing the shaft rod 12.

Subsequently, the fiber layer 1A is formed (step S3). Here, as shown in FIG. 6C, the fiber layer 1A is formed by winding the fiber sheet (resin impregnated) 2A whose fiber direction is the axial direction around the side surface of the shaft rod 12.

Subsequently, the fiber layer 1B is formed (step S4). Here, as shown in FIG. 6D, the fiber layer 1B is formed by winding the fiber sheet (resin impregnated) 2B having the fiber direction in the circumferential direction on the fiber layer 1A.

Subsequently, a press is applied from the outside to cure the resin (step S5). As a result, as shown in FIG. 7A, a joint 1 composed of two fiber layers 1A and 1B wound around the shaft rod 12 is formed. In this embodiment, steps S3, S4, and S5 cure the resin while fixing the fiber sheets 2A and 2B impregnated with the resin around the side surface of the shaft rod 12 on which a plurality of irregularities are formed. Corresponds to the first step of making a tubular joint 1 made of fiber sheets 2A and 2B impregnated with a cured resin.

Subsequently, the radius of the shaft rod 12 (core rod 6) is adjusted so that the radius becomes smaller (step S6). Here, the long piece 8 is pulled out from the pipe 7 in the axial direction to reduce the radius of the shaft rod 12 (core rod 6) as shown in FIG. 7B. The diameter of the shaft rod 12 is such that the shaft rod 12 can be pulled out without resistance and the adhesive does not enter the gap between the shaft rod 12 and the joint 1. On the back split portion of the pipe 7, P.I. P. Since the tape 9 or the like is wrapped around the pipe, the adhesive described later does not flow into the pipe. Here, P.I. When the P tape 9 is attached to the fiber layer 1A, the P.I. The P tape 9 is peeled off from the fiber layer 1A. P. P. The tape 9 has low adhesiveness to the epoxy resin and is wound in a spiral shape, so that the tape 9 can be easily peeled off. Therefore, the right half and the left half of the shaft rod 12 of FIG. 7A are wound around the core rod 6 by P.I. It is desirable to separate the P tape 9.

Subsequently, the shaft rod 12 is pulled out halfway (step S7). Here, as shown in FIG. 7C, the shaft rod 12 is pulled out to the left side. That is, in this embodiment, steps S6 and S7 correspond to the second step of extracting the shaft rod 12 from one end of the joint 1 halfway. Here, a through hole 10 is formed in the joint 1. Two through holes 10 are formed at the end of the shaft rod 12 and at the back side of the portion where the shaft rod 12 is not inserted.

Subsequently, as shown in FIG. 5, the bending reinforcing rod 2 is inserted into the portion where the shaft rod 12 is extracted (step S8). Here, as shown in FIG. 7D, the rod member 2 is inserted from the right end portion from which the shaft rod 12 is pulled out.

Subsequently, an adhesive such as an epoxy resin is injected into the portion where the bending reinforcing bar 2 is inserted through one of the through holes 10 to cure the adhesive layer 4 (step S9). As shown in FIG. 7E, the adhesive layer 4 is formed between the bar 2 and the joint 1. As a result, the bar 2 is fixed to the joint 1. That is, in this embodiment, in steps S8 and S9, the rod 2 as the first rod for bending reinforcement is inserted from the other end of the joint 1, and the joint 1 is filled with an adhesive to form a rod. Corresponds to the third step of fixing the material 2 to the joint 1.

Subsequently, the shaft rod 12 is completely pulled out from the end of the joint 1 (step S10). As a result, as shown in FIG. 7F, a space in which the bar member 2 is not inserted is formed in the joint 1. That is, in this embodiment, step S10 corresponds to the fourth step of completely pulling out the shaft rod 12 from one end of the joint 1.

Subsequently, the joint 1 and the bar 2 are fixed to the groove portion of the flat plate (step S12). As shown in FIG. 8, the flat plate 20 is formed with three groove portions 21 in the longitudinal direction. A joint 1 and a bar 2 are inserted into each groove 21, an adhesive such as epoxy is filled in the groove 21, and the joint 1 and the bar 2 are fixed. Here, the through hole 10 provided in the joint 1 (the through hole 10 on the side where the bar 2 is not provided) and the through hole 10 formed in the flat plate 20 are aligned with each other, and their positions are aligned. The joint 1 is installed so that That is, in this embodiment, step S12 corresponds to the eighth step of forming a through hole 10 through which the inner surface of the joint 1 and the outer surface of the construction member 100 to which the joint 1 is fixed are inserted.

Subsequently, the groove 21 is also filled with an adhesive to close it, and after the adhesive is cured, the flat plate 20 is formed. Subsequently, the flat plate 20 is attached to the laminated lumber or lumber to create the construction member 100 (step S13). FIG. 3A shows the construction member 100 created in this way. As shown in FIG. 3A, joints 1 are inserted and fixed at both ends of the bar 2. As a result, the groove portion 21 becomes an elongated hole 50. That is, in this embodiment, in steps S12 and S13, the joint 1 and the rod 2 are inserted in a state where one end of the joint 1 can insert the joining rod 3 for joining with the other construction member 100. Corresponds to the fifth step of fixing to the wood-based construction member 100.

The construction member 100 is joined to another construction member 100 and used as a beam. As shown in FIG. 9, two construction members 100 are joined via a joining rod 3.

Returning to FIG. 5, the bar member 3 for joining is inserted into the joint 1 (step S14). Here, as shown in FIG. 10, a joining rod 3 for joining with another construction member 100 is inserted into the elongated hole 50 of the construction member 100.

Subsequently, the bar member 3 for joining is also inserted into the other construction member 100 (step S15). In this way, as shown in FIGS. 11A and 11B, the two construction members 100 are connected via the bar 3. That is, in this embodiment, steps S14 and S15 correspond to the ninth step of inserting the bar 3 for joining with the other construction member 100 from one end of the joint 1.

Subsequently, the adhesive is injected through the through hole 10 (step S16). As shown in FIG. 12, the adhesive injected from the through hole 10 of one of the construction members 100 flows through the joint 1 as shown by the arrow, and the joint rod 3 is further inserted from the joint 1. It enters the slotted hole 50 and reaches the other construction member 100. The air existing in the joint 1 and the elongated hole 50 escapes from the through hole 10 of the other construction member 100, and then the adhesive is filled. When the adhesive filled in the joint 1 and the slot 50 is cured, the joining of the two construction members 100 is completed. In this embodiment, step S16 corresponds to the tenth step of injecting an adhesive through the through hole 10 to fix the joint 1 and the bar 3.

By the way, the joint state of the construction member 100 is not limited to that described above. For example, as shown in FIGS. 13A and 13B, it is also possible to pass the bar member 3 for joining through the elongated hole 60 of the column member 101 and join the two construction members 100 as beams via the column member 101. ..

As described in detail above, the tubular joint 1 according to this embodiment is a simple method in which fiber sheets 2A and 2B are wound around a shaft rod 12 having a plurality of irregularities formed on the side surface to cure the resin. It is formed. Further, since the joint 1 is formed of the fiber sheets 2A and 2B, it is small and lightweight. Further, since a plurality of irregularities are formed on the inner surface of the joint 1, a high joining force can be obtained. That is, according to this embodiment, a plurality of irregularities are formed on the inner side surface, and the joint 1 which is lightweight and has high joint strength can be manufactured by a simple method.

Embodiment 2.
The inner surface of the joint 1 according to the first embodiment is described in P.I. P. A mesh-like unevenness was formed using the tape 9. However, the present invention is not limited to this. The inner surface of the joint 1 may be formed with spiral irregularities.

In FIG. 14, as shown by partially crushing the joint 1, in this embodiment, a spiral thread groove is formed on the side surface of the shaft rod 12. The unevenness formed on the inner side surface of the joint 1 is along the spiral thread groove formed on the side surface of the shaft rod 12. The shaft rod 12 also has non-adhesiveness to the resin impregnated in the fiber sheets 2A and 2B. In this way, the shaft rod 12 can be pulled out from the joint 1 while rotating the shaft rod 12 along the thread groove.

The manufacturing method of the joint 1, the construction member 100, and the structure in this embodiment is the same as that in the above embodiment (see FIGS. 4 and 5). In steps S7 and S10, if the resin impregnated in the wound fiber sheets 2A and 2B is cured and then the shaft rod 12 is rotated along the thread groove, the shaft rod 12 can be pulled out from the joint 1. it can.

As described above, in this embodiment, the inner side surface of the joint 1 is formed with spiral irregularities along the threaded grooves of the shaft rod 12. Due to this unevenness, the bonding force between the inserted bar 2 and the bar 3 is improved. In this embodiment, instead of steps S1 and S2 in FIG. 4, a shaft rod 12 having spiral irregularities formed on the surface is generated prior to the formation of the fiber layer 1A (step S3). This generation step corresponds to the seventh step of forming a spiral thread groove on the side surface of the shaft rod 12.

The shaft rod 12 according to this embodiment can be reused as it is even after one joint 1 is made. Therefore, it is possible to create a plurality of joints 1 with one shaft rod 12. As a result, the productivity of the joint 1 is improved.

The construction member 100 according to the above embodiment can be applied not only to beams but also to pillars. For example, as shown in FIGS. 15A, 15B, 16A and 16B, the construction member 100 can be joined to the reinforced concrete foundation 102 as a column base. In this case, as shown in FIGS. 15A and 15B, first, the bar member 3 for joining is inserted and fixed in the construction member 100, and then the bar member is inserted into the vertical hole 70 of the reinforced concrete foundation 102 filled with non-shrinkage grout. 3 may be inserted to fix the construction member 100 on the reinforced concrete foundation 102.

Further, as shown in FIGS. 16A and 16B, the bar member 3 for joining is inserted into the vertical hole 70 of the reinforced concrete foundation 102, filled with non-shrinkage grout to fix the bar member 3, and then the bar member 3 is fixed. May be inserted into the elongated hole 50 of the construction member 100 and the adhesive may be poured through the through hole 10. In this case, it is necessary to form an air vent hole 71 for inserting the elongated hole 50 and the outside in the construction member 100, and to discharge the air in the elongated hole 50 to the outside.

In the above embodiment, a plurality of irregularities are formed on the entire surface of the inner surface, but a plurality of irregularities may be formed on a part of the inner surface.

Further, in the above embodiment, the number of joints 1 to be inserted into the construction member 100 is 6 pairs, but the number is not limited to this. It may be from one pair to five pairs, or seven or more pairs. The number of joints 1 can be arbitrarily set depending on the partner to be joined.

In the above embodiment, the rods 2 and 3 are deformed reinforcing bars, but other rods such as an aramid rod may be used. In short, it may be a bar made of a material harder than the construction member.

In the above embodiment, the carbon fiber sheet is used to form the joint 1, but another fiber sheet may be used to form the joint 1. For example, aramid fiber, Kevlar, Dyneema and the like may be used.

In the above embodiment, the resin to be impregnated in the carbon fiber sheet is an epoxy resin, but the present invention is not limited to this. Polyamide-based resin, phenol-based resin, and resorcinol resin may be used.

In the above embodiment, each of the fiber sheets 2A and 2B has four rolls, but the present invention is not limited to this. It may be one roll, two rolls, or three rolls. Further, 5 or more rolls may be used.

In the above embodiment, the construction member 100 is a wood-based member, but the present invention is not limited to this. For example, it may be a concrete member, for example, pre-cass concrete.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the invention. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated by the scope of claims, not by the embodiment. Then, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

It should be noted that the present application claims priority based on Japanese Patent Application No. 2015-7576 filed on January 19, 2015, and the specification of Japanese Patent Application No. 2015-7576 is described in the present specification. , The scope of claims and the entire drawing shall be incorporated as a reference.

The present invention is suitable for use as a joint in a structure such as a building or a bridge.

1 Fitting, 1A, 1B Fiber Layer, 2, 3 Bar Material, 2A, 2B Fiber Sheet, 4 Adhesive Layer, 6 Core Rod, 7 Pipe, 8 Long Piece, 9 P.I. P. (Polypropylene) tape, 10 through holes, 11 transparent tapes, 12 shaft rods, 20 flat plates, 21 grooves, 50, 60 long holes, 70 vertical holes, 71 air vent holes, 100 construction members, 101 pillars, 102 reinforced concrete foundations

Claims (4)

A tubular joint made of a fiber sheet impregnated with the cured resin is formed by curing the resin while winding a fiber sheet impregnated with the resin around the side surface of the shaft rod having a plurality of irregularities. The first step to create and
The shaft rod is pulled out halfway from one end of the joint to provide a first through hole at a position corresponding to the end of the shaft rod on the side wall of the joint, and the shaft rod is inserted into the side wall of the joint. The second step of providing a second through hole at a position corresponding to the back side that is not provided, and
A third step of sealing the adhesive in the joint and fixing the first bar to the joint with the first bar for bending reinforcement inserted from the other end of the joint.
A fourth step of completely extracting the shaft rod from one end of the joint, and
A fifth step of fixing the joint and the first bar to a wood-based or concrete construction member in a state where one end of the joint can insert a joining rod for joining with another construction member. When,
A method for manufacturing a structure including. Prior to the first step,
A sixth step of forming the shaft rod by winding a tape having a plurality of irregularities formed in a mesh shape and having non-adhesiveness to the resin on the side surface of the core rod whose radius can be adjusted is included.
In the second step,
The radius of the core rod is shortened, and the shaft rod is pulled out.
The method for manufacturing a structure according to claim 1. Prior to the first step,
A seventh step of forming a spiral threaded groove on the side surface of the shaft rod is included.
In the second step,
The shaft rod is pulled out while rotating the shaft rod with respect to the joint along the thread groove.
The method for manufacturing a structure according to claim 1. The fifth step is
Eighth steps of aligning the first through hole of the joint with the third through hole made in the construction member to which the joint is fixed include.
A ninth step of inserting a second bar for joining with another construction member from one end of the joint, and
A tenth step of injecting an adhesive through the first and third through holes to fix the joint and the second bar material, and
The method for manufacturing a structure according to any one of claims 1 to 3, which comprises.

Images