JP2003003588A - Blocking device for piereced opening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device with an easy handling and a good mounting workability to block a pierced opening. SOLUTION: At both ends of separated retaining members 3A and 3A, the sections facing each other in coupling direction have temporarily-secured coupling means 5 and 5 with engaging portions 5A and receiving portions 5B which are detachable along the outside surface B1 of a structural body B. At least one of the temporarily-secured coupling means 5 rotates both the separated retaining members 3A and 3A in engaging position on an axis along the longitude direction of the lengthy side C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention closes a through hole formed in a wall or a floor for inserting a long object such as a pipe through a heat resistant filler while the long object is inserted. The present invention relates to a through hole closing jig.

[0002]

2. Description of the Related Art Generally, refrigerant pipes for air conditioning are installed in the attic or attic of a building, and it is not possible to pass a wall or floor during installation. Piping is a common practice. In the case of a building made of concrete skeleton, the piping is arranged by using the through holes formed in the wall or floor. According to the above rule, it is necessary to block the fireproof section by closing it, and in practice, a through hole closing jig is used to close the through hole while the pipe is still inserted. Conventionally, as a through-hole closing jig 100 of this type, for example, as shown in FIG. 17, after a pipe C or the like is inserted into a through-hole 1 formed in a vertical wall B which is a concrete skeleton in advance, a steel plate is formed. A pair of half-frames 101, 101 formed by bending is attached to each other from the left and right direction of the pipe C and fixed to the outer surface B1 of the through-hole 1 so that the inner peripheral surface of each half-frame 101, 101 and the pipe There is a type in which the inside and outside of the wall can be divided into a fireproof zone by filling a fireproof putty 102 between the outer peripheral surface of C and closing the through hole 1. Then, in such a through hole closing jig 100, each half frame body 10 is made in a state in which the half frame bodies 101, 101 are butted with each other almost accurately.
1, 101 are integrally provided with screw receiving portions 103,
103 are vertically overlapped with each other, and the concrete screw K is inserted from the overlapped screw receiving portions 103, 103.
By screwing into the outer surface B1 of the through hole 1, the respective half frame bodies 101, 101 can be attached and fixed to the outer surface B1 of the through hole 1.

[0003]

However, the work of bringing the half-frames 101, 101 into contact with the outer surface of the through-hole 1 is carried out by using both hands, and then the half-frames 1 attached to each other.
To fix 01 and 101 to the outer surface B1 of the through hole 1,
While holding the abutting state of the half-frames 101, 101 with one palm so as not to collapse, in addition to this, guide the concrete screw K near the screw receiving portion 103 so that the concrete screw K can be screwed in with a fingertip. However, it is necessary to perform an attaching work such that the concrete screw K is screwed in with the other hand using an electric screwdriver or the like. Therefore, it is necessary to carry out installation work that can only be done if your hands are dexterous.
There is a problem of poor workability. In particular, when the through-hole portion that inserts the piping such as the partition wall behind the ceiling is closed with a through-hole closing jig, it is often a high place work like looking into the ceiling from the ceiling window. It has been pointed out that the work posture is such that the face is in the upward posture and both hands are always in the lifting posture, and the workability is poor.

The present invention has been made in view of the above-mentioned circumstances, and its main problem is to provide a through-hole closing jig which is easy to handle and has good mounting workability. .

[0005]

According to a first aspect of the present invention, there is provided a through hole closing jig having a mounting structure for an outer surface of a structure in which a through hole for arranging a long object is formed. Further, an annular holding frame that can be mounted on a long object protruding from the through hole and is filled in a state of closing the opening of the through hole between the inner peripheral surface of the annular holding frame and the outer peripheral surface of the long object. And a heat-resistant filler, and the annular holding frame is a through-hole closing jig composed of a divided holding frame body divided into two in the circumferential direction, and the end portions of both divided holding frame bodies are provided. Among them, a temporary fixing connecting means having an engaging portion and an engaging receiving portion that can be engaged and disengaged from a direction along the outer surface of the structure is provided across both end portions facing each other in the connecting direction. At the same time, at least one of the temporary fixing connecting means is arranged so that the split holding frame bodies are axially aligned in the longitudinal direction of the elongated object in the engaged state. Ride relatively turnably in that it is configured.

According to the above-mentioned characteristic construction, the split holding frames are temporarily fastened together by forming a ring-shaped holding frame by engaging and connecting the split holding frames by the temporary fastening connecting means. Since it can be formed and the ring-shaped holding frame does not disassemble freely compared to the conventional through hole closing jig, it is easy to handle and even when it is attached to the pipe insertion part of the vertical wall. The whole of the annular holding frame can be held by attaching any part of the holding frame with one hand, and in this holding state, the annular holding frame can be easily attached to the outer surface of the through hole. In addition, with respect to the long object protruding from the through hole, the split holding bodies are butted from the left and right directions along the outer surface of the structure centering on the long object to engage the engaging portion and the engagement receiving portion. In this case, both temporary fixing connecting means are temporarily fixed so that the long object of the portion projecting from the through hole can be externally mounted, or
In advance, the engaging portion and the engagement receiving portion of one temporary fixing connecting means are engaged with each other, and the two holding frames are opened in an inverted C shape with the temporary connecting means as the center of rotation. A portion protruding from the through hole by positioning the long object on the outer surface of the structure and engaging the other temporary fastening connecting means along the outer surface of the structure to put both temporary fastening connecting means into the temporary fastening state. It is also possible to make the long object of the above can be exteriorized. Therefore, it is possible to select the work operation that temporarily holds the divided holding frame members together according to the current situation of the construction site, such as the condition of the through hole and the condition of the long object protruding from the through hole. Workability can be significantly improved.

According to a second aspect of the present invention, there is provided a through hole closing jig which is characterized in that the temporary receiving connecting means is provided with an engaging receiving portion in a state in which the engaging portion can be engaged with and disengaged from the engaging receiving portion. The point is that a retaining elastic body for restraining the withdrawal movement of the engaged engaging portion is provided.

According to the above characteristic structure, when the engagement portion and the engagement receiving portion are brought into the engaged state, the retaining elastic body supports the engaged state from the back and the engaged state is released. Restrained,
Since the maintenance power of the temporarily fixed state can be strengthened, the temporarily fixed state will not easily collapse,
It has good workability and enables quick construction.

A through hole closing jig according to a third aspect of the present invention is characterized in that the engaging portion and the engaging receiving portion of the temporary fixing connecting means are formed with mounting holes communicating with each other in an engaged state. In point.

According to the above characteristic structure, the mounting holes are formed by utilizing the temporary fixing portions of the divided holding frame members.
Since the engaging portion and the engaging receiving portion are used as added value forming portions for forming the mounting holes, the mounting portion for the outer side surface of the structure is originally provided separately from the provision of the temporary connecting means. The parts that must be provided in the split holding frame can be used as members, and the number of members can be reduced and the handleability can be improved.

According to a fourth aspect of the present invention, there is provided a through-hole closing jig having a characteristic construction in which the shaft receiving center of both of the temporarily receiving connecting means is engaged with the engaging portion as it engages with the engaging portion. The point is that a guide portion for guiding the movement in the direction is formed.

According to the above-mentioned characteristic structure, the presence of the guide portion allows the engaging portions of the temporary fixing coupling means and the engaging receiving portions to be in an engaged state in which the axes thereof naturally match. Therefore, a well-balanced annular holding frame can be quickly formed, and when the temporary fixing connecting means is used as the rotation center, it can be used as the rotation center almost at the same time as the engagement. It is possible to improve the property.

According to a fifth aspect of the present invention, there is provided a through hole closing jig which is characterized in that each of the divided holding frame bodies is brought into contact with the peripheral edge of the through hole of the structure so as to penetrate the center position of the annular holding frame. The point is that a mounting position restricting body that aligns with the center position of the hole is provided.

According to the above-mentioned characteristic structure, the annular holding frame body in the temporarily fixed state is provided on the periphery of the through hole formed in the structure.
By facing the mounting position regulator and abutting it,
Since the center position of the through hole and the center position of the annular holding frame can be made to substantially coincide with each other, for example, the center position of the through hole and the center position of the annular holding frame can be repeated many times over the entire circumference. It is possible to reduce the alignment work that is performed while visually checking, and the approximate positional relationship can be known by the feel of the mounting position regulator contacting the peripheral edge of the through hole. Even in the field, the installation work can be assisted by the feel of the installation work, and highly reliable work can be performed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Embodiment] A through hole closing jig A according to an embodiment of the present invention will be described below with reference to the drawings. The through hole closing jig A of this embodiment is formed on a partition wall B at the back of the ceiling made of a structural body such as a concrete skeleton, and a cooling insulation pipe C, which is an example of a long object, is inserted therethrough. It is configured so that it can be mounted on the through hole 1. In the drawing, an example is shown in which two sets of pipes C, which have different pipe diameters, such as a coating gas pipe for an air-conditioning refrigerant, a coating liquid pipe, and a cable, are inserted into the through hole 1.

As shown in FIGS. 1 to 9, the through hole closing jig A has a mounting portion 2 for the outer side surface B1 of the through hole 1 and is a long object C protruding from the through hole 1. A ring-shaped holding frame 3 that can be installed, and an inner peripheral surface of the ring-shaped holding frame 3 and a long object C
And a heat resistant filler 4 which is filled between the outer peripheral surface of the through hole 1 and the outer peripheral surface of the through hole 1 in a closed state, and the annular holding frame 3 is divided into two equally in the circumferential direction. 3A,
3A, which is detachable from the direction along the outer surface B1 of the through hole 1 over both ends of the split holding frames 3A, 3A that face each other in the connecting direction, and ,
In the engaged state, provisional fastening connecting means 5 and 5 are provided, which include an engaging portion 5A and an engaging receiving portion 5B that allow relative rotation around an axis along the longitudinal direction of the long object C. At the same time, each of the temporary fixing connecting means 5 and 5 is configured to be fitted together with the closing operation using the engaged temporary connecting means 5 as a pivot.

Each of the divided holding frames 3A, 3A has a thickness of 1 m.
The peripheral surface portion 3a has a curved shape in which the outer diameter decreases from the bottom end portion 3b having a semicircular shape toward the tip portion 3c having a half-rim shape, and is formed by processing using a steel plate of about m. The engaging portion 5A and the engaging receiving portion 5B are in communication with each other in an engaged state, the concrete screw K is inserted and supported, and the attachment portion 2 to the outer surface B1 of the through hole 1 is formed.

A flat locking ring 5a having an insertion hole 2a formed in the center is fixed to one end of each divided holding frame 3A, 3A, and the other end is punched into a mortar shape in the center. The flat lock receiving ring 5b having the conical hole 2b formed toward the lower surface side is fixed, and the flat lock ring 5 is fixed.
The engaging portion 5A of the temporary fastening connecting means 5 is constituted by a,
The flat engagement receiving ring 5b constitutes an engagement receiving portion 5B of the temporary fixing coupling means 5, and the split holding frames 3A,
In a state in which 3A is engaged and coupled, the engaging portion 5A and the engaging receiving portion 5B are fitted together, and the engaging portion 5A is attached in a lower position and the engaging receiving portion 5B is attached in an upper position so as to overlap with each other. The mounting portion 2 is configured. Engagement portion 5A and engagement receiving portion 5B
In the state in which and overlap, the conical hole 2b of the engagement receiving portion 5B fits into the insertion hole 2a of the engagement portion 5A, and the engagement portion 5A and the engagement receiving portion 5B are aligned in axial axis. ing. In a state where the two divided holding frame bodies 3A, 3A are connected, the locking portion 5A and the engagement receiving portion 5B are brought into an engaged state, and the two divided holding frame bodies 3A, 3A can be temporarily fixed. it can.

The tapered outer peripheral surface 2c of the conical hole 2b projecting to the lower surface side formed in the engagement receiving portion 5B of the temporary fixing coupling means 5 is engaged with the insertion hole 2a of the engaging portion 5A. As a result, a guide portion 6 for guiding the movement in a direction in which the axes of the two 5A and 5B coincide with each other is configured.

The mounting portion 2 has an engaging portion 5 which is a mounting hole.
The insertion hole 2a of A and the conical hole 2b of the engagement receiving portion 5B, which is a mounting hole, are connected to both of the divided holding frame bodies 3A and 3A. The annular holding frame 3 formed by bringing the divided holding frame bodies 3A and 3A into an integrally connected state by being screwed into the outer side surface B1 of the through hole 1 is attached to the outer side surface B1 of the through hole 1.
It can be attached to.

In the temporary fixing coupling means 5 and 5 of this embodiment, the engaging portion 5A engaged with the engaging receiving portion 5B in a state where the engaging portion 5A is disengaged from the engaging receiving portion 5B. A retaining elastic body 7 is provided for restraining the removal movement of the.

The retaining elastic body 7 is shown in FIGS.
As shown in, the corresponding retaining portions 5A can be received in the lower portions of the engagement receiving portions 5B of the divided holding frame bodies 3A, 3A,
Further, it is composed of a bar elastic plate material made of phosphor bronze or the like attached in an inclined state in which the protruding amount increases toward the tip side so as to elastically bias the received locking portion 5A from the rear side. The retaining portion 7A provided at the bottom of 5B
And a mounting portion 7B which is bent substantially at a right angle from a base end side edge of the retaining portion 7A and fixed to the inner peripheral surface of the split holding frame body 3A by spot welding or the like.
It consists of and. Further, an insertion hole 7C is formed in the retaining portion 7A of the retaining elastic body 7, and in a state in which both the split holding frame bodies 3A, 3A are connected, a locking portion 5A and an engagement receiving portion 5B are formed. The retaining portion 7A overlaps with the third layer, and the insertion hole 2a of the locking portion 5A and the engagement receiving portion 5B are formed.
The conical hole 2b and the hole axis of the insertion hole 7C of the retaining portion 7A are aligned, and these holes 2a, 2b,
7C through the concrete screw K and the outer surface B of the through hole 1
It is configured so that it can be screwed into 1.

At both end portions of the tip end portion 3c of each of the split holding frame bodies 3A, 3A, coupling end portions of the split holding frame bodies 3A, 3A that face each other in the coupling direction are engaged with each other so that they can be inserted and removed from the coupling direction. The auxiliary locking portion 8A and the auxiliary locking receiving portion 8B are provided. In this embodiment, one auxiliary locking portion 8A is configured by providing the tongue piece 8a with the locking convex portion 8b.
The other auxiliary lock receiving portion 8B is composed of a lock hole 8c formed in the tip portion 3c. Both split holding frame 3A,
Following the temporary fixing of 3A, the locking projection 8b is engaged with the locking hole 8c, and the locking portion 8A and the receiving portion 8B are brought into the engaged state.

Further, concrete screws K are attached to both ends of the peripheral surface portion 3a of each of the divided holding frames 3A, 3A.
The recessed portion 3d is integrally formed so as to be easily exposed.

As the heat-resistant filler 4, a putty-like material whose volume ratio expands by a factor of 4 or more due to combustion heating during a fire and which can be handled manually is used. Also,
The heat-resistant filler 4 is used in advance for the divided holding frames 3A, 3A.
Workability is good if it is filled and installed inside.

With such a configuration, at the stage where a plurality of pipes C ... Are inserted into the through hole 1 formed in the partition wall B or the like, for example, one of the following work operations is performed. The divided holding frames 3A, 3A divided into two by
Is temporarily attached to the pipe C protruding from the through hole 1 in a temporarily fixed state.

As shown in FIG. 3, with respect to the pipe C protruding from the through hole 1, the split holding frame members 3 A,
The pipe C is sheathed by the annular holding frame 3 in which 3A is abutted against each other and both are temporarily fixed.

As shown in FIG. 4, with respect to the pipe C projecting from the through hole 1, the engaging portion 5A and the engaging receiving portion 5B of one of the temporary holding connecting means 5 of the split holding frames 3A, 3A are connected. Are engaged with each other to position the long object C at the center of the two holding frames 3A, 3A opened in an inverted C shape with the temporary fixing connecting means 5 as the center of rotation, and the through hole 1 Outer side B1
The other temporary fastening connecting means 5 is engaged along the above to put both temporary fastening connecting means 5 into the temporarily fastening state, so that the long objects C ...

As shown in FIG. 5, with respect to the pipe C protruding from the through hole 1, the engaging portion 5A and the engaging receiving portion 5B of the other temporary fixing connecting means 5 of the two divided holding frame bodies 3A, 3A are provided. Are engaged with each other to position the long objects C ... In the center of which the two holding frames 3A, 3A are opened in a V shape with the temporary fixing connecting means 5 as the center of rotation, and the outside of the through hole 1 By engaging one temporary fastening connecting means 5 along the side surface B1 to put both temporary fastening connecting means 5 into a temporary fastening state, the through hole 1
The part of the long object C ...

Next, as shown in FIG. 9, the annular holding frame 3
The mounting portions 2 and 2 of ... Are screwed into the outer surface B1 of the through hole 1 via concrete screws K, and the annular holding frame 3 is mounted and fixed to the outer surface B1 of the through hole 1.

Next, the inner peripheral surface of the annular holding frame 3 and the pipe C
The heat-resistant filling material 4 is filled between the outer peripheral surface of ... And the construction of the through-hole closing jig A is completed.

[Other Embodiments] 1) In the above embodiment, the outer surface B1 of the through hole 1 extends over both ends of the split holding frames 3A, 3A that face each other in the connecting direction. Temporary fastening connecting means 5 and 5 provided with an engaging portion 5A and an engaging receiving portion 5B that can be engaged and disengaged from a direction along the same.
Is provided, and both temporary connecting means 5,
5 is an elongated object C that holds both split holding frames 3A, 3A in the engaged state.
Although the example in which it is configured to be relatively rotatable around the axial center along the longitudinal direction has been described, the present invention is not limited to this, and at least one of the temporary fixing connection means 5 is in the engaged state in both split holding frames. The bodies 3A, 3A may be configured to be relatively rotatable about an axis along the longitudinal direction of the long object C. In this case, the engaging portion 5A and the engaging receiving portion 5B that constitute the temporary fixing coupling means 5 at the other end have no relative rotation function between them.
Engagement configurations such as concave-convex engagement, elastic engagement, and magnetic engagement by electromagnetic induction are used.

2) In the above embodiment, in the state where both the split holding frame bodies 3A, 3A are engaged and connected, FIG. 7 and FIG.
In the above description, the engagement portion 5A is in the lower side and the engagement receiving portion 5B is in the upper side overlapping relationship, but the present invention is not limited to this, and these are arranged in the upside-down relationship. Good. As a specific example, as shown in FIGS. 10 and 11, a flat locking ring 5a, which is an engaging portion 5A having an insertion hole 2a formed in a central portion, is provided at one end of each of the split holding frames 3A, 3A. Is fixed, and the other end is fixed with a flat locking receiving ring 5b which is an engaging receiving portion 5B in which a mortar-shaped conical hole 2b is formed in the central part toward the upper surface side. In a state in which the frame bodies 3A, 3A are engaged and coupled, the engagement portion 5A is attached in an upper position and the engagement receiving portion 5B is placed in a lower overlapping position. A retaining elastic body 7 for restraining the withdrawal movement of the engaging portion 5A engaged with the engaging receiving portion 5B is provided on the upper portion of the engaging receiving portion 5B while allowing the engaging portion 5A to be engaged with and disengaged from the engaging receiving portion 5B. The configuration for deployment is disclosed.

In the case of this embodiment, as shown in FIG. 12, the concrete screw K is passed through the insertion hole 2a of the engaging portion 5A, the conical hole 2b of the engagement receiving portion 5B, and the insertion hole 7C of the retaining portion 7A. Can be screwed into the outer surface B1 of the through hole 1 to attach the annular holding frame 3 to the outer surface B1 of the through hole 1. Further, as shown in FIG. 13, when it is sufficient to mount the annular holding frame 3 on the outer surface B1 of the through hole 1 formed in the floor or the like, the tap screw 9 is screwed into the conical hole 2b. Together, the retaining portion 7A, the locking portion 5A, and the engagement receiving portion 5B
And 3 are connected together in a tightened state,
3A can be changed from the temporarily fixed state to the integrally connected state.

3) In each of the above embodiments, the conical hole 2b is formed.
An example in which the tapered outer peripheral surface 6c configures the guide portion 6 that moves and guides in a direction in which the axes of both 5A and 5B coincide with each other when engaging with the engaging portion 5A has been described, but the present invention is not limited to this. First, as shown in FIGS. 14 and 15, the engagement receiving portion 5
The eyelet 10 may be struck from the lower side in the insertion hole of B in the drawing, and the head 10A having a semicircular cross section of the eyelet 10 may be configured as the guide portion 6, and the engagement portion 5A may be engaged with the insertion hole 2a. Accordingly, it is possible to guide the movement in a direction in which the axes of the both 5A and 5B match. In this case, the guide portion 6 can be easily formed. The eyelet 10 has a cylindrical hole 10
Since B is formed, the cylindrical hole 10B constitutes the mounting portion 2 which is also used as a screw insertion hole.

4) As shown in FIG. 16, the annular holding frame 3 engaged and connected to the peripheral edge of the through hole 1 of the wall B in a temporarily fixed state is moved along the outer surface B1 of the through hole 1, By attaching the bending inclined portion 11A at the tip facing the through hole 1 to each other, the attachment position regulating bodies 10 and 10 for aligning the center position of the annular holding frame with the center position of the through hole by the contact feeling. May be provided on the inner surface side of each of the divided holding frames 3A, 3A at all circumferential positions or at a plurality of positions.

5) In the above embodiment, an example in which the structure is constructed in the through hole 1 of the wall B made of a concrete skeleton has been described, but it is an example in which the structure is constructed in the through hole 1 of the floor made of a concrete skeleton. May be. Further, in the above embodiment, an example in which the through hole closing jig A of the present invention is attached and fixed to one opening side of the through hole 1 has been described, but the through hole closing of the present invention is performed on both opening sides of the through hole 1. The jigs A and A may be attached and fixed.

6) In the above embodiment, the mounting portion 2 is
Although the example provided in the temporary fixing connecting means 5 portion has been described, the invention is not limited to this, and for example, the bottom end portion 3 of each divided holding frame body 3A, 3A.
The mounting portion 2 may be configured by integrally providing a screw receiving portion having a screw hole formed outward at an appropriate portion of b and 3b.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a through-hole closing jig according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a through hole closing jig is attached to the outer surface of the through hole.

FIG. 3 is a simplified front view showing a state immediately before the long object is externally covered with the split holding frame body.

FIG. 4 is a simplified front view showing a state immediately before the long object is externally covered with the split holding frame body.

FIG. 5 is a simplified front view showing a state immediately before the long object is externally covered with the split holding frame body.

FIG. 6 is a simplified front view showing a state in which a pair of divided holding frame bodies are attached to each other.

FIG. 7 is a cross-sectional view of essential parts showing a state before connecting the temporarily connecting means.

FIG. 8 is a cross-sectional view of essential parts showing a state in which the divided holding frame body is temporarily fixed by a temporary fixing connection means.

FIG. 9 is a vertical cross-sectional view showing a state in which an annular holding frame is attached to the outer surface of the through hole.

FIG. 10 is a cross-sectional view of essential parts showing a state before connection in a temporary fixing connection means of another embodiment.

FIG. 11 is a cross-sectional view of essential parts showing a state in which the divided holding frame body is temporarily fixed by a temporary fixing connection means.

FIG. 12 is a cross-sectional view of essential parts showing a state in which a split holding frame is attached to a structure.

FIG. 13 is a cross-sectional view of an essential part showing a state in which a split holding frame is placed on a structure.

FIG. 14 is a cross-sectional view of an essential part showing a guide part of another embodiment in a state before being connected.

FIG. 15 is a cross-sectional view of essential parts showing a state in which a temporary fixing state is made.

FIG. 16 is a sectional view of an essential part showing an example of a mounting position restricting body.

FIG. 17 is a perspective view of a main part of a conventional through-hole closing jig.

[Explanation of symbols]

A Through-hole closing jig B structure (wall) B1 outer surface C long object (piping) 1 through hole 2 Mounting part 3 annular holding frame 4 Heat resistant filler 5 Temporary connecting means 5A locking part 5B receiving part 6 Guide section 7 Retaining elastic body 10 Mounting position control body

Claims (5)

[Claims] 1. An annular holding frame having a mounting portion for the outer surface of a structure in which a through hole for arranging a long object is formed and which can be mounted on a long object protruding from the through hole. A heat-resistant filling material filled in a state of closing the opening of the through hole is provided between the inner peripheral surface of the annular holding frame and the outer peripheral surface of the elongated object, and the annular holding frame is divided into two in the circumferential direction. A through-hole closing jig composed of divided holding frames, in which the end faces of both of the divided holding frames are provided on the outer surface of the structure over both ends facing each other in the connecting direction. A temporary fixing connecting means having an engaging portion and an engaging receiving portion that can be engaged and disengaged from a direction along the side is provided, and at least one of the temporary fixing connecting means holds both split holding frame bodies in an engaged state. A through-hole closing jig configured to be relatively rotatable around an axis along the longitudinal direction of a long object. 2. The retainer for restraining the withdrawal movement of the engagement portion engaged with the engagement receiving portion in the state where the engagement portion is engaged with and disengaged from the engagement receiving portion. The through-hole closing jig according to claim 1, wherein an elastic body is provided. 3. The through-hole closing jig according to claim 1 or 2, wherein the engaging portion and the engaging receiving portion of the temporary fixing connecting means are formed with mounting holes communicating with each other in an engaged state. 4. The engagement receiving portion of the temporary fixing connection means includes:
The through-hole closing jig according to claim 1, 2 or 3, wherein a guide portion is formed that guides movement in a direction in which the shaft cores of the two engage with each other as the shaft engages with the engaging portion. 5. A mounting position restricting body for aligning the center position of the annular holding frame with the center position of the through hole by abutting on the peripheral edge of the through hole of the structure is attached to each of the divided holding frame bodies. The through-hole closing jig according to any one of claims 1 to 4, which is provided.