JP2005324114A - Surface treatment tool and surface treatment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface treatment tool and a surface treatment method for surface-treating a longitudinal member or a structural material by which the workability is improved. <P>SOLUTION: The surface treatment tool in stead of a conventional surface treatment tool for surface-treating the longitudinal member is provided with a covering member for air-tightly covering an inner space surrounding the surface of an interval between 2 places apart from each other in the longitudinal direction of the longitudinal member, a 1st communicating port for allowing the inner space to communicate with the outside of the covering member and a 2nd communicating port for allowing the inner space to communicate with the outside of the covering member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a surface treatment jig and a surface treatment method for surface treating a longitudinal member or a structural material. In particular, the present invention relates to a surface treatment jig and a surface treatment method suitable for surface treatment of a longitudinal member or a structural material constituting a structure such as a steel tower.

The structure composed of the longitudinal members and the structural material is subjected to rust prevention treatment in order to prevent deterioration due to surface corrosion.
The structure is made of, for example, a steel pipe or an angle material.
The inner surface of the steel pipe, the outer surface of the steel pipe, and the outer surface of the angle member are rust-proofed. For example, zinc rich paint is applied.
The rust-proof coating deteriorates with time. Therefore, the surface of the structure is periodically subjected to rehabilitation treatment.
In general, the rehabilitation treatment is composed of a cleansing operation for removing rust and deteriorated paint, and a painting operation for coating thereafter.
Rehabilitation work for rehabilitating structural materials such as steel towers is a high-altitude work and is performed carefully.
During the rehabilitation work, care must be taken so that rust, old paint, and new paint that have fallen off the longitudinal members of the structure and the structural material do not splash around.

Conventionally, in rehabilitation work such as steel towers, the entire steel tower was covered with a net, and rust removal work and painting work were performed by human power. For example, since the steel tower is surrounded by a triple to quadruple net, the temperature inside the net is 40 degrees C to 50 degrees C, which is a severe working environment for the worker.
The inside of the net was dim and hot, so the workability did not improve.
In order to improve workability, several surface treatment jigs have been proposed, but there has been no jig or method for easily surface treating the entire structure such as a steel tower.

JP 2003-232485 A JP 2001-347204 A

  The present invention has been devised in view of the problems described above, and intends to provide a surface treatment jig and a surface treatment method for surface treating a longitudinal member or a structural material capable of improving workability. .

  In order to achieve the above object, a surface treatment jig for surface-treating a longitudinal member according to the present invention is a covering member that airtightly covers an internal space surrounding a surface between two locations separated in the longitudinal direction of the longitudinal member. And a first communication port that communicates the internal space to the outside of the covering member, and a second communication port that communicates the internal space to the outside of the covering member.

  With the above-described configuration of the present invention, the covering member hermetically covers the internal space surrounding the surface between the two locations separated in the longitudinal direction of the longitudinal member, and the first series of openings extends the internal space to the outside of the covering member. Since the second communication port communicates the internal space to the outside of the covering member, when fluid flows from one of the first communication port or the second communication port to the other, the fluid passes through the internal space. And in contact with the longitudinal member while flowing between the two locations.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the first continuous port and the second communication port are separated from each other in the longitudinal direction of the longitudinal member.
According to the configuration of the present invention, since the first communication port and the second communication port are separated from each other in the longitudinal direction of the longitudinal member, the fluid is supplied from one of the first communication port or the second communication port. When put in and out to the other, the fluid contacts the longitudinal member while flowing in the longitudinal direction between the two places through the internal space.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the central axis in which at least one of the central axis of the first series of openings or the central axis of the second communication opening extends along the longitudinal direction of the longitudinal member. Is eccentric.
According to the configuration of the present invention, at least one of the central axis of the first communication port or the central axis of the second communication port is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member. When the fluid is introduced from one of the first communication port or the second communication port and is discharged to the other, the fluid contacts the longitudinal member while flowing in the longitudinal direction between the two locations through the internal space.

Furthermore, the surface treatment jig according to the embodiment of the present invention has a cylindrical shape in which the covering member is connected to the pair of sealing members so that the two portions are airtight and to the pair of sealing members, respectively. Member.
According to the configuration of the present invention, the pair of seal portions make the two portions airtight, and the cylindrical member connects both ends to the pair of seal members airtightly. When entering from one of the mouth and the second communication port and exiting from the other, it is possible to reliably prevent fluid from leaking from the gap between the longitudinal member and the covering member.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the seal member is slidable in the longitudinal direction of the longitudinal member.
According to the configuration of the present invention, the seal member is slidable in the longitudinal direction of the longitudinal member, so that while putting the fluid from one of the first serial port or the second communication port and out to the other, The cylindrical member can be moved in the longitudinal direction.

  In order to achieve the above object, a surface treatment jig for surface-treating a longitudinal member according to the present invention is a covering member that airtightly covers an internal space surrounding a surface between two locations separated in the longitudinal direction of the longitudinal member. And an inner partition that divides the inner space into an inner inner space that surrounds all or part of the surface between the two locations and an outer inner space located outside the inner inner space, and the inner inner space A first communication port that communicates with the outside of the covering member; and a second communication port that communicates the outside internal space with the outside of the covering member, wherein the internal partition wall includes the outside internal space and the inside internal space. It is assumed that an internal communication port that communicates with each other can be provided.

  With the configuration of the present invention described above, the covering member hermetically covers the internal space surrounding the surface between the two locations separated in the longitudinal direction of the longitudinal member, and the internal partition wall covers the internal space between the two locations. Partitioning into an inner internal space that encloses all or a portion thereof and an outer internal space located outside the inner internal space, and an internal communication port of the internal partition wall connects the outer internal space and the inner internal space; A series communication port communicates the inner inner space to the outside of the covering member, and a second communication port communicates the outer inner space to the outside of the covering member. When a fluid is flowed from one of the ports to the other, the fluid contacts the longitudinal member while flowing between the two locations through the inner inner space.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the first series of openings and the internal communication opening are separated in the longitudinal direction of the longitudinal member.
According to the configuration of the present invention, since the first communication port and the internal communication port are separated from each other in the longitudinal direction of the longitudinal member, fluid is introduced from one of the first communication port or the second communication port. Then, the fluid comes into contact with the longitudinal member while flowing in the longitudinal direction between the two locations through the inner internal space.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the central axis of the first through hole is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member.
According to the configuration of the present invention, the central axis of the first continuous port is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member. When the fluid enters from one of the fluids to the other, the fluid comes into contact with the longitudinal member while flowing in the longitudinal direction between the two locations through the inner internal space.

Furthermore, the surface treatment jig according to the embodiment of the present invention has a cylindrical shape in which the covering member is connected to the pair of sealing members so that the two portions are airtight and to the pair of sealing members, respectively. And an inner cylindrical member in which both ends of the inner partition wall are connected to the pair of sealing members in an airtight manner.
According to the configuration of the present invention, a pair of seal members make the two portions airtight, a cylindrical member connects the pair of seal members both airtightly, and an internal cylindrical member makes a pair of the seals. Since both ends are connected to the member in an airtight manner, when the fluid is introduced from one of the first communication port or the second communication port and discharged to the other, the fluid leaks from the gap between the longitudinal member and the covering member. Can be suppressed.

Furthermore, in the surface treatment jig according to the embodiment of the present invention, the seal member is slidable in the longitudinal direction of the longitudinal member.
According to the configuration of the present invention, the seal member is slidable in the longitudinal direction of the longitudinal member, so that while putting the fluid from one of the first serial port or the second communication port and out to the other, The cylindrical member can be moved in the longitudinal direction.

  In order to achieve the above object, a surface treatment method for surface treating a longitudinal member according to the present invention includes a surface treatment jig mounting step for mounting the surface treatment jig described above on a longitudinal member, A fluid introduction step of introducing a fluid into one of a series of communication ports or the second communication port; a fluid discharge step of discharging a fluid from the other of the first series of communication ports or the second communication port; It was supposed to be equipped with.

  According to the configuration of the present invention, the surface treatment jig described above is attached to the longitudinal member in the surface treatment jig attachment step, and the fluid introduction step is performed on one of the first serial port or the second communication port. Since the fluid is introduced and fluid is discharged from the other of the first communication port or the second communication port in the fluid discharge step, the fluid flows into the longitudinal member while flowing between the two locations through the internal space. Touch.

  Moreover, in order to achieve the said objective, the surface treatment method for surface-treating the longitudinal member which concerns on this invention is equipped with the several surface treatment jig | tool which mount | wears the longitudinal member with the surface treatment method as described above in series. A step of communicating with each other a first series of openings or second communication openings of adjacent surface treatment jigs; and the first series of openings of the surface treatment jigs arranged in series or the above Fluid introduction process for introducing fluid into one of the second communication ports, and fluid for discharging the fluid from one of the first communication ports or the second communication ports of the surface treatment jig arranged in series And a discharging step.

  According to the configuration of the present invention, the plurality of surface treatment jigs described above are attached in series to the longitudinal member in the plurality of surface treatment jig attachment steps, and the first of the surface treatment jigs adjacent to each other in the communication port communication step. The communication port or the second communication port communicates with each other, and a fluid is introduced into one of the first series of ports or the second communication port of the surface treatment jig arranged in series in the fluid introduction process, Since the fluid is discharged from one of the first communication port or the second communication port of the surface treatment jig arranged in series in the discharge step, the fluid flows between two locations through the internal space. While touching the longitudinal member.

Furthermore, the surface treatment method of the embodiment according to the present invention introduces an abrasive or a paint together with the fluid in the fluid introduction step.
According to the configuration of the present invention, since the abrasive or paint is introduced together with the fluid in the fluid introduction step, the abrasive or paint mixed in the fluid is in contact with the longitudinal member while flowing between the two locations through the internal space. Polish or paint the longitudinal member.

Furthermore, the surface treatment method of the embodiment according to the present invention introduces a pig having an abrasive or a paint attached together with the fluid in the fluid introduction step.
According to the configuration of the present invention, since the pig with the abrasive or paint attached together with the fluid is introduced in the fluid introduction step, the abrasive or paint attached to the pig mixed in the fluid passes through the internal space between the two locations. In contact with the longitudinal member while flowing, the longitudinal member is polished or painted.

Furthermore, in the surface treatment method of the embodiment according to the present invention, the fluid introduction step introduces air,
The fluid discharging step discharges gas by suction with negative pressure.
With the above-described configuration of the present invention, the fluid discharge step discharges the gas by suction with a negative pressure, so that the gas flows efficiently in the internal space.

  In order to achieve the above object, a surface treatment jig for surface-treating the surface of a structural material according to the present invention includes a covering member that airtightly covers an internal space in contact with a predetermined area of a plane, and the internal space. A first communication port that communicates with the outside of the covering member, and a second communication port that communicates the internal space with the outside of the covering member.

  According to the above-described configuration of the present invention, the covering member airtightly covers the internal space in contact with the predetermined region on the surface, the first series of openings communicates the internal space to the outside of the covering member, and the second communicating opening is the internal portion. Since the space communicates with the outside of the covering member, the structure allows the fluid to flow through a predetermined region through the internal space when the fluid enters from one of the first communication port or the second communication port and exits to the other. Touch the surface of the material.

  Moreover, in order to achieve the said objective, the surface treatment method for surface-treating the plane of the structural material which concerns on this invention, the surface treatment jig mounting process which presses the surface treatment jig | tool as described above on the surface of a structural material And a fluid introduction step of introducing a fluid into the first series of communication ports, and a fluid discharge step of discharging the fluid from the second communication ports.

  According to the configuration of the present invention, the surface treatment jig mounting step presses the surface treatment jig described above against the surface of the structural material, the fluid is introduced into the first series of openings in the fluid introduction step, and the fluid is discharged. Since the fluid is discharged from the second communication port in the process, the fluid contacts the plane of the structural material while flowing through a predetermined region through the internal space.

Furthermore, the surface treatment method of the embodiment according to the present invention introduces an abrasive or a paint together with the fluid in the fluid introduction step.
With the configuration of the present invention, since the abrasive or paint is introduced together with the fluid in the fluid introduction step, the abrasive or paint mixed in the fluid contacts the plane of the structural material while flowing through a predetermined region through the internal space.

Furthermore, the surface treatment method of the embodiment according to the present invention introduces a pig having an abrasive or a paint attached together with the fluid in the fluid introduction step.
According to the configuration of the present invention, since the pig with the abrasive or paint adhering to the fluid is introduced together with the fluid in the fluid introduction step, the abrasive or paint adhering to the pig mixed in the fluid flows through the predetermined space through the internal space. While touching the plane of the structural material.

As described above, the surface treatment jig according to the present invention has the following effects due to its procedure and configuration.
When the covering member airtightly covers the internal space surrounding the surface between the two locations separated in the longitudinal direction of the longitudinal member and fluid is flowed from one of the first series port or the second communication port to the other, Touches the surface between the two points of the longitudinal member through the interior space.
In addition, since the first communication port and the second communication port are separated in the longitudinal direction of the longitudinal member,
The fluid contacts the longitudinal member while flowing in the longitudinal direction between the two locations through the internal space.
In addition, since at least one of the central axis of the first communication port or the central axis of the second communication port is eccentric with respect to the central axis of the longitudinal member, the fluid passes between the two locations through the internal space. It contacts the longitudinal member while flowing while turning in the longitudinal direction.
In addition, a pair of seal portions make the two portions airtight, and a cylindrical member connects both ends to the pair of seal members in an airtight manner, thereby preventing leakage from the gap between the longitudinal member and the covering member. it can.
Further, since the seal member is slidable in the longitudinal direction of the longitudinal member, the cylindrical member can be moved in the longitudinal direction.

In addition, as described above, the surface treatment jig according to the present invention has the following effects due to its procedure and configuration.
The inner space that encloses the inner space that surrounds the surface between the two locations that are separated in the longitudinal direction of the longitudinal member with the covering member, and that surrounds all or part of the surface of the longitudinal member between the two locations with the internal partition A space and an outer inner space located outside are partitioned, and an inner communication port communicates the outer inner space and the inner inner space, and communicates with the first series of ports or the outer inner space communicating with the inner inner space. When a fluid is caused to flow from one of the second communication ports to the other, the fluid contacts the surface between the two portions of the longitudinal member through the inner inner space.
In addition, since the first communication port and the internal communication port are separated in the longitudinal direction of the longitudinal member, the fluid contacts the longitudinal member while flowing in the longitudinal direction between the two locations through the inner space. .
Further, since the central axis of the first series of openings is decentered with respect to the central axis extending along the longitudinal direction of the longitudinal member, the fluid passes through the inner space in the longitudinal direction between the two locations. It touches the longitudinal member while flowing while turning.
In addition, a pair of sealing members hermetically seals the two locations, the cylindrical member connects both ends to the pair of sealing members hermetically, and an inner cylindrical member hermetically seals both ends of the pair of sealing members. Therefore, fluid can be prevented from leaking from the gap between the longitudinal member and the covering member.
Further, since the seal member is slidable in the longitudinal direction of the longitudinal member, the cylindrical member can be moved in the longitudinal direction.

As described above, the surface treatment method according to the present invention has the following effects due to its procedure and configuration.
The surface treatment jig described above is mounted on a longitudinal member, and a fluid is introduced into one of the first communication port or the second communication port, and the front first communication port or the second communication port. Since the fluid is discharged from the other of the two, the fluid contacts the longitudinal member while flowing between the two portions through the internal space.
In addition, the surface treatment jigs described above are arranged in series by mounting the plurality of surface treatment jigs described above in series and communicating the first series or second communication ports of the surface treatment jigs adjacent to each other. A fluid is introduced into one of the first serial port or the second communication port of a tool, and one of the first serial port or the second communication port of the surface treatment jig arranged in series Since the fluid is discharged from the fluid, the fluid contacts the surface sandwiched between the two portions of the longitudinal member through the internal space.
In addition, since the abrasive or paint is introduced together with the fluid, the abrasive or paint mixed in the fluid is in contact with the longitudinal member while flowing between the two locations through the internal space to polish or paint the longitudinal member.
In addition, since the pig with the abrasive or paint adhering to the fluid is introduced together with the fluid, the abrasive or paint adhering to the pig mixed with the fluid flows between the two locations through the internal space and comes into contact with the longitudinal member. Polish or paint the part.
Further, since the fluid discharging step discharges the gas by suction with a negative pressure, the gas efficiently flows in the internal space.
Therefore, it is possible to provide a surface treatment jig and a surface treatment method for surface-treating a longitudinal member capable of improving workability.

As described above, the surface treatment jig according to the present invention has the following effects due to its procedure and configuration.
Covering an internal space that is in contact with a predetermined region of the surface with a covering member in an airtight manner, and flowing fluid from one of the first communication port communicating with the internal space or the second communication port communicating with the internal space to the other The fluid contacts the surface of the structural material while flowing through a predetermined region through the internal space.

As described above, the surface treatment method according to the present invention has the following effects due to its procedure and configuration.
The surface treatment jig described above is pressed against the flat surface of the structural material, the fluid is introduced into the first communication port, and the fluid is discharged from the second communication port. It touches the surface of the structural material while flowing through
Further, since the abrasive or paint is introduced together with the fluid, the abrasive or paint mixed in the fluid flows through the internal space and contacts a predetermined region on the surface of the structural material.
In addition, since the pig with the abrasive or paint adhering to the fluid is introduced together with the fluid, the abrasive or paint adhering to the pig mixed with the fluid flows through the internal space and contacts a predetermined region on the surface of the structural material.
Therefore, it is intended to provide a surface treatment jig and a surface treatment method for surface-treating the surface of a structural material capable of improving workability.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

First, the surface treatment jig according to the first embodiment will be described.
FIG. 1 is a cross-sectional view of a surface treatment jig 1 according to a first embodiment of the present invention. FIG. 2 is a plan sectional view of the surface treatment jig 1 according to the first embodiment of the present invention.
The surface treatment jig 1 is an apparatus for surface-treating a longitudinal member, and includes a covering member 10, a first serial port P 1, a second communication port P 2, and a pipe 30.
The covering member 10 is a member that airtightly covers the internal space H that surrounds all of the surface between two portions that are separated in the longitudinal direction of the longitudinal member T.
The first series opening P1 communicates the internal space H to the outside of the covering member 10.
The second communication port P2 communicates the internal space H to the outside of the covering member 10.
For example, the covering member 10 includes a pair of sealing members 11 and a cylindrical member 12.
The seal member 11 is a member that hermetically seals the entire circumference of two longitudinally spaced locations of the longitudinal member T.
In particular, it is preferable that the seal member 11 is slidable in the longitudinal direction of the longitudinal member and is swingable around the longitudinal member.
The cylindrical member 12 is a member having a cylindrical shape in which both ends are connected to a pair of seal members in an airtight manner. For example, the cylindrical member 12 is preferably made of a transparent or translucent material (for example, a transparent resin film).
For example, the cylindrical member 12 is divided in half and can be disassembled and assembled. One place or a plurality of places on the circumference of the cylindrical member 12 can be separated and coupled by a chuck or the like.

The pipe 30 is a pipe for sending a fluid to the internal space H and discharging the fluid from the internal space H, and includes a first pipe 31 and a second pipe 32.
The first piping 31 communicates with the first communication port P1, and the second piping 32 communicates with the second communication port P2.
1 (A) and 2 (A) show a case where the first continuous port P1 and the second communication port P2 face each other with the longitudinal member T of the covering member 10 in between when the longitudinal member is a circular pipe. It is shown that it is provided at each position. The internal space H has an annular cross section that surrounds the outer wall of the circular tube.
FIG. 1C shows that when the longitudinal member T is an angle member, the first continuous port P1 and the second communication port P2 are provided at positions facing each other with the longitudinal member T of the covering member 10 therebetween. Shows that The internal space H has an annular cross section that surrounds the outer wall of the angle member.
The fluid is guided from the outside of the covering member 10 to the first pipe 31 and enters the first series port P1, enters the internal space H from the first series port P1, crosses the longitudinal direction of the circular pipe T, and enters the interior. It flows in the space H in one direction, exits from the second communication port P2, is guided to the second pipe 32, and is discharged to the outside of the covering member 10.
FIG. 2B shows that a rectifying plate 13 that rectifies the flow of the fluid from the first communication port P <b> 1 to the second communication port P <b> 2 is provided inside the covering member 10.

There are three methods for flowing fluid into the internal space H.
In one method, a fluid having a pressure higher than the atmospheric pressure is passed through the first pipe, and the second pipe is opened to the atmospheric pressure.
In the second method, the first pipe is opened to the atmospheric pressure, and a pressure lower than the atmospheric pressure (so-called negative pressure) is applied to the second pipe to suck out the fluid in the internal space H.
In the third method, a fluid having a pressure higher than the atmospheric pressure is supplied to the first pipe, and a pressure lower than the atmospheric pressure (so-called negative pressure) is applied to the second pipe to suck out the fluid in the internal space H.
In particular, it is preferable to open the first pipe to the atmospheric pressure and suck the fluid in the internal space H by the negative pressure stored in the negative pressure tank in the second pipe.

It is preferable that the first communication port P1 and the second communication port P2 are separated in the longitudinal direction of the longitudinal member T.
In this way, the fluid is guided to one of the first pipe 31 or the second pipe 32 and enters the internal space H, moves in the longitudinal direction in the internal space H surrounding the outer surface of the longitudinal member T, and the first pipe 31. Alternatively, it is guided to the other side of the second pipe 32 and discharged to the outside of the covering member 10.
FIG. 3A shows that when the longitudinal member T is a circular pipe, the first continuous port P1 and the second communication port P2 are provided at positions shifted in the longitudinal direction of the circular tube T. ing.
The fluid is guided to the first pipe 31 and enters the internal space H, moves in the longitudinal direction in an annular cross section surrounding the surface of the circular pipe, and is guided to the second pipe 32 and discharged.
FIG. 3B shows that when the longitudinal member T is a circular pipe, the plurality of first communication ports P1 and the plurality of second communication ports P2 are provided at positions shifted in the longitudinal direction of the circular tube T. It shows that there is. A valve is provided so that a plurality of first communication ports P1 can be selected. A valve is provided so that a plurality of second communication ports P2 can be selected. In the figure, a white valve is in an open state, and a black valve is in a closed state.
By alternately switching the valves, the fluid moves in one longitudinal direction around the circular cross section surrounding the surface of the circular tube, and moves in the other longitudinal direction along the circular cross section surrounding the surface of the circular tube.

Further, it is preferable that at least one of the central axis of the first communication port P1 or the central axis of the second communication port P2 is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member T.
Here, for example, the central axis of the first communication port P1 or the second communication port P2 is a line connecting the centroids of the holes forming the first communication port P1 or the second communication port P2. Further, the central axis of the longitudinal member is a line connecting the centroids of the cross section of the longitudinal member.
In this way, the fluid is guided to the first pipe 31 and enters the internal space, turns around the longitudinal member along the internal space surrounding the outer surface of the longitudinal member T, and is guided to the second pipe 32 and discharged. Is done. Alternatively, the fluid is guided to the second pipe 32 and enters the internal space, turns around the longitudinal member in the internal space surrounding the outer surface of the longitudinal member T, and is guided to the first pipe 31 and discharged.
FIG. 1B shows that the central axis of the first communication port P1 and the central axis of the second communication port P2 are eccentric with respect to the central axis extending along the longitudinal direction of the circular tube T.

The first communication port P1 and the second communication port P2 are separated from each other in the longitudinal direction of the longitudinal member T, and at least one of the central axis of the first communication port P1 or the central axis of the second communication port P2 is the longitudinal member T. It is preferable to be decentered with respect to the central axis extending along the longitudinal direction.
In this way, the fluid enters the internal space H, moves in the longitudinal direction while turning around the longitudinal member in the internal space H surrounding the surface of the longitudinal member T, and is discharged to the outside.

Next, the surface treatment jig 1 according to the second embodiment of the present invention will be described.
FIG. 4 is a cross-sectional view of the surface treatment jig 1 according to the second embodiment of the present invention. FIG. 5 is a plan sectional view of the surface treatment jig 1 according to the second embodiment of the present invention.
The surface treatment jig 1 is a device for surface-treating the elongate member T, and includes a covering member 10, a first communication port P 1, a second communication port P 2, an internal partition wall 20, and a pipe 30.
The covering member 10 is a member that airtightly covers the internal space H that surrounds all of the surface between two portions that are separated in the longitudinal direction of the longitudinal member T.
For example, the covering member 10 includes a pair of sealing members 11 and a cylindrical member 12.
The seal member 11 is a member that hermetically seals the entire circumferences of two locations separated in the longitudinal direction of the longitudinal member.
In particular, it is preferable that the seal member 11 is slidable in the longitudinal direction of the longitudinal member and is swingable around the longitudinal member.
The cylindrical member 12 is a member having a cylindrical shape in which both ends are connected to a pair of seal members in an airtight manner. For example, the cylindrical member 12 is preferably made of a transparent or translucent material (for example, a transparent resin film).
For example, the cylindrical member 12 is divided in half and can be disassembled and assembled.

The inner partition wall 20 includes an inner inner space H1 that surrounds all or part of the surface between two portions of the inner member H that are separated in the longitudinal direction of the longitudinal member T, and an outer inner space H2 that is located outside the inner inner space H1. And an internal communication port P3 that communicates the outer inner space H2 and the inner inner space H1.
It is preferable that the internal partition wall 20 has an internal cylindrical member in which both ends are connected to the pair of the sealing members 11 in an airtight manner. For example, the inner cylindrical member is preferably made of a transparent or translucent material (for example, a transparent resin film). An internal communication port P3 is provided in the internal cylindrical member.
For example, the inner cylindrical member is divided in half and can be disassembled and assembled.
The first communication port P1 communicates the inner inner space H1 to the outside of the covering member 10.
The second communication port P2 communicates the outer internal space H2 to the outside of the covering member 10.

The pipe 30 is a pipe for sending a fluid to the internal space H and discharging the fluid from the internal space H, and includes a first pipe 31 and a second pipe 32.
The first piping 31 communicates with the first communication port P1, and the second piping 32 communicates with the second communication port P2.
FIGS. 4A and 4B and FIG. 5A show that when the longitudinal member T is a circular tube or an angle member, the first communication port P1 is located in the second communication port P2, The one pipe 31 and the second pipe 32 have a double pipe structure, and the internal communication port P3 and the first serial port P1 are respectively provided at locations where the longitudinal member T of the internal partition wall 20 is sandwiched therebetween. Shows that
When the fluid is guided to the second pipe 32 and enters the inner space H and is discharged from the first pipe 31, the fluid enters the outer inner space H <b> 2 from the second communication port P <b> 2 and intersects the longitudinal direction of the longitudinal member T. It moves along the outer periphery of the inner partition wall 20 in the outer inner space H2, passes through the inner communication port P3, enters the inner inner space H1, and moves along the surface of the longitudinal member T across the longitudinal direction of the longitudinal member T. Then, it exits from the first series of openings P1, is led to the first pipe, and is discharged to the outside of the covering member.
Alternatively, when the fluid is guided to the first pipe 31 and enters the inner space H and is discharged through the second pipe 32, the fluid enters the inner inner space H1 from the first series opening P1, and the length of the longitudinal member T is increased. Crossing the direction, moving along the surface of the lead pipe T, passing through the internal communication port P3, crossing the longitudinal direction of the longitudinal member T, moving along the outer periphery of the internal partition wall 20 and moving outside outer space H2, It exits from the two communication ports P <b> 2, is guided to the second pipe 32, and is discharged outside the covering member 10.

It is preferable that the first communication port P1 and the internal communication port P3 are separated in the longitudinal direction of the longitudinal member T.
In this way, the fluid moves in the longitudinal direction of the longitudinal member T along the surface of the longitudinal member T in the inner inner space H1.
FIG. 5B shows that when the longitudinal member T is a circular tube, the two internal communication ports P3 are spaced apart from the first series of communication ports P1 in the longitudinal direction.
The fluid is guided to the second pipe 32 and enters the outer inner space H2, enters the inner inner space H1 from the outer inner space H2 via the inner communication port P3, and moves in the longitudinal direction along the surface of the circular tube T. Then, it is discharged from the first series port P1 to the first pipe 31. Alternatively, the fluid is guided to the first pipe 31 and enters the inner inner space H1, moves in the longitudinal direction along the surface of the circular tube T, and passes from the inner inner space H1 to the outer inner space via the inner communication port P3. H2 enters and exits from the second communication port P2 to the second pipe 32 and is discharged to the outside of the covering member 10.

The central axis of the first series opening P1 is preferably eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member T.
In this way, the fluid swirls around the longitudinal member in the inner internal space H <b> 1 along the surface of the longitudinal member T and is discharged to the outside of the covering member 10.

The first communication port P1 and the internal communication port P3 are separated from each other in the longitudinal direction of the longitudinal member T, and at least one of the central axis of the first communication port P1 or the central axis of the internal communication port P2 is the longitudinal length of the longitudinal member T. It is preferably eccentric with respect to the central axis extending along the direction.
In this way, the fluid moves in the longitudinal direction while turning around the longitudinal member T along the surface of the longitudinal member in the inner inner space H1, and is discharged to the outside of the covering member 10.

Next, the surface treatment jig 1 according to the third embodiment will be described.
FIG. 6 is a cross-sectional view of the surface treatment jig 1 according to the third embodiment of the present invention.
The surface treatment jig 1 is a device for surface-treating the longitudinal member T, and includes a covering member 10, a first communication port P 1, a second communication port P 2, an internal partition wall 20, a pipe 30, and a partition wall 40. Composed.
Since the structure of the covering member 10, the first serial port P1, the second communication port P2, and the piping 30 is the same as that according to the second embodiment, the description thereof is omitted.

The inner partition wall 20 is divided into an inner inner space H1 that surrounds a part of the surface between two locations that are separated from each other in the longitudinal direction of the longitudinal member T, and an outer inner space H2 that is located outside the inner inner space H1. An internal communication port P3 that divides and communicates the outer inner space H2 and the inner inner space H1 is provided.
It is preferable that the internal partition wall 20 has an internal cylindrical member in which both ends are connected to the pair of the sealing members 11 in an airtight manner. For example, the inner cylindrical member is preferably made of a transparent or translucent material (for example, a transparent resin film).
The first communication port P1 communicates the inner inner space H1 to the outside of the covering member 10.
The second communication port P2 communicates the outer internal space H2 to the outside of the covering member 10.
FIG. 6 shows an internal partition wall 20 having an arc-shaped cross section and extending along the longitudinal direction of the longitudinal member. The edge of the arc-shaped cross section forms a portion surrounding the internal communication port P3.

The partition wall 40 is a wall that partitions the internal space H and divides the space into a space formed by the inner inner space H1 and the outer inner space H2 and another space H3.
FIG. 6 shows that the partition wall 40 is in contact with the surface of about half of the longitudinal member T and divides a part of the internal space into another space H3.
For example, when the covering member 10 can be divided into halves, the partition wall 40 can be fixed on one side inside the other half where the internal partition wall 20 is not provided and can adhere the other side to the longitudinal member T. A pair of plates.
For example, when the covering member 10 can be divided in half, the partition wall 40 is a film that can be bent and stretched on the inner side of the half in which the internal partition wall 20 is not provided.
When the half-split covering member 10 is set and assembled on the longitudinal member T, the partition wall 40 covers about half of the surface of the longitudinal member T.
FIG. 6A shows a case where the surface treatment jig 1 is set on a longitudinal member T of a circular tube.
FIG. 6B shows a case where the surface treatment jig 1 is set on the long member T of an angle material.
FIG. 6C shows a state in which the surface treatment jig 1 as an example is disassembled.

Next, a surface treatment jig 1 according to a fourth embodiment of the present invention will be described.
FIG. 7 is a cross-sectional view of the surface treatment jig 1 according to the fourth embodiment of the present invention.
The surface treatment jig 1 is an apparatus for surface-treating a flat surface of a structural material, and includes a covering member 10, a first series of communication ports P1, and a second communication port P2.
The covering member 10 is a member that airtightly covers the internal space H in contact with a predetermined area on the plane.
The first series opening P1 communicates the internal space H to the outside of the covering member 10.
The second communication port P2 communicates the internal space H to the outside of the covering member 10.
In particular, the first series opening P1 is preferably located at a position close to the surface of the structural material in the internal space H.

Below, the surface treatment method which concerns on embodiment of this invention is demonstrated based on figures.
First, the surface treatment method according to the first embodiment of the present invention will be described with reference to the drawings.
8 and 9 are schematic views of the surface treatment method according to the first embodiment of the present invention.
The surface treatment method is a method for surface-treating a longitudinal member or a structural material, and includes a surface treatment jig mounting step, a fluid introduction step, and a fluid discharge step.

The surface treatment jig attaching step is a step of attaching the surface treatment jig 1 to the longitudinal member.
The surface treatment jig 1 according to the first to third embodiments is attached to the longitudinal member.
The longitudinal member constituting the structure is divided into a plurality of locations, and the surface treatment jig 1 is attached to each location.
For example, the surface treatment jig 1 having an internal space H with a short length and a large cross-sectional area is set at the connecting portion of the longitudinal member.
A surface treatment jig 1 having an internal space with a long length and a small cross-sectional area is set at a portion of the longitudinal member having no protrusion.

The fluid introduction step is a step of introducing a fluid into one of the first series of communication ports P1 or the second communication port P2.
For example, a fluid (for example, air) is introduced into the first series opening P <b> 1 through each first pipe 31 of the surface treatment jig 1.
Introduce abrasive or paint with the fluid. As the abrasive, a hard metal, resin, or a hard metal, a sponge containing resin, or the like is introduced.
Alternatively, it is preferable to introduce the pig 2 to which an abrasive or paint is attached together with the fluid. For example, there are a pig 2 having a hard metal exposed on the surface, a resin pig 2 mixed with an abrasive, or a sponge pig 2 that can hold and suck a paint.

The fluid discharge step is a step of discharging the fluid from the other of the first series port P1 or the second communication port P2.
Three methods for introducing a fluid into one of the first communication port P1 or the second communication port P2 and discharging the fluid from the other of the first communication port P1 or the second communication port P2 are described. To do.
In the first method, a fluid having a pressure equal to or higher than atmospheric pressure is introduced into one of the first communication port P1 or the second communication port P2, and the first communication port P1 or the second communication port P2 The other side is opened to atmospheric pressure.
In the second method, one of the first communication port P1 or the second communication port P2 is opened to atmospheric pressure, and the other of the first communication port P1 or the second communication port P2 is sucked by negative pressure. To do.
In the third method, a fluid having a pressure higher than atmospheric pressure is introduced into one of the first communication port P1 or the second communication port P2, and the first communication port P1 or the second communication port P2 The other is sucked by negative pressure.
Moreover, it is preferable to alternately repeat the step of flowing a fluid from the first communication port P1 to the second communication port P2 and the step of flowing a fluid from the second communication port P2 to the first communication port P1.

FIG. 12 is an operation diagram of the surface treatment method according to the embodiment of the present invention.
The abrasive, paint or pig 2 mixed in the fluid flows on the fluid flow and flows while colliding along the surface of the longitudinal member.
When the fluid or the pig 2 with the abrasive material attached thereto is mixed in the fluid, the surface of the longitudinal member is polished with the abrasive material, and old paint and rust adhering to the surface of the longitudinal member can be removed.
When the fluid paint or the pig 2 to which the paint is attached is mixed, the paint can be applied to the surface of the longitudinal member.

Next, the surface treatment method according to the second embodiment of the present invention will be described with reference to the drawings.
FIG. 10 is a schematic diagram of the surface treatment method according to the second embodiment of the present invention.
The surface treatment method is a method for surface-treating a longitudinal member or a structural material, and includes a plurality of surface treatment jig mounting step, a communication port communication step, a fluid introduction step, and a fluid discharge step.

The multiple surface treatment jig mounting step is a step of mounting the multiple surface treatment jigs 1 in series on the longitudinal member.
A plurality of surface treatment jigs 1 according to the first to third embodiments are mounted in series on a longitudinal member.
The longitudinal member constituting the structure is divided into a plurality of locations, and the surface treatment jig 1 is attached to each location.
For example, the surface treatment jig 1 having an internal space H with a short length and a large cross-sectional area is set at the connecting portion of the longitudinal member.
A surface treatment jig 1 having an internal space with a long length and a small cross-sectional area is set at a portion of the longitudinal member having no protrusion.

The communication port communication step is a step of communicating the first series of communication ports P1 or the second communication ports P2 of the surface treatment jigs 1 adjacent to each other.
For example, the first communication port P1 and the second communication port P2 of the surface treatment jig 1 that are adjacent to each other through the communication pipe 33 are communicated.
A first pipe 31 communicates with the first series of openings P1 of the surface treatment jig 1 located at one end of the plurality of surface treatment jigs 1 arranged in series.
A second pipe 32 communicates with the second communication port P1 of the surface treatment jig 1 located at the other end of the plurality of surface treatment jigs 1 arranged in series.

The fluid introduction step is a step of introducing a fluid into one of the first series port P1 or the second communication port P2 of the surface treatment jig 1 arranged in series.
For example, a fluid (for example, air) is supplied to the first communication port P <b> 1 or the second communication port P <b> 2 through the first piping 31 or the second piping 32 of the surface processing jig 1 positioned at the ends of the plurality of surface processing jigs 1. ).
Mix abrasive or paint into the fluid. The abrasive is a hard metal, resin, or a hard metal, a sponge containing a resin, or the like.
Alternatively, it is preferable to mix the pig 2 with an abrasive or paint attached to the fluid. For example, a pig 2 having a hard metal exposed on the surface, a resin pig 2 mixed with an abrasive, or a sponge pig 2 capable of sucking paint is mixed.

The fluid discharge step is a step of discharging the fluid from one of the first series port P1 or the second port P2 of the plurality of surface treatment jigs 1 arranged in series.
For example, the fluid from the first communication port P1 or the second communication port P2 through the first pipe 31 or the second pipe 32 of the surface treatment jig 1 positioned at the ends of the plurality of surface treatment jigs 1 arranged in series. Is discharged.
Three methods for introducing the fluid into one of the first pipe 31 and the second pipe 32 and discharging the fluid from the other of the first pipe 31 and the second pipe 32 will be described.
In the first method, a fluid having a pressure higher than atmospheric pressure is introduced into one of the first pipe 31 or the second pipe 32 of the surface treatment jig 1 located at the end, and the surface treatment jig 1 located at the end. One of the first pipe 31 and the second pipe 32 is set to atmospheric pressure.
In the second method, one of the first pipe 31 and the second pipe 32 of the surface treatment jig 1 located at the end is set to atmospheric pressure, and the first pipe 31 or the first pipe 31 of the surface treatment jig 1 located at the end is used. One of the two pipes 32 is sucked by negative pressure.
The third method is to introduce a fluid having a pressure equal to or higher than atmospheric pressure into one of the first pipe 31 or the second pipe 32 of the surface treatment jig 1 located at the end, and the surface treatment treatment located at the end. One of the first pipe 31 or the second pipe 32 of the tool 1 is sucked by negative pressure.
In addition, it is preferable to alternately repeat the process of flowing a fluid from the first pipe 31 to the second pipe 32 and the process of flowing a fluid from the second pipe 32 to the first pipe 31.

    FIG. 12 is omitted because the operation of the surface treatment method according to the first embodiment of the present invention is the same as that of the surface treatment method according to the second embodiment.

Next, the surface treatment method according to the third embodiment of the present invention will be described with reference to the drawings.
FIG. 11 is a schematic view of a surface treatment method according to the third embodiment of the present invention.
The surface treatment method is a method for surface-treating a longitudinal member or a structural material, and includes a surface treatment jig mounting step, a fluid introduction step, and a fluid discharge step.

The surface treatment jig attaching step is a step of attaching the surface treatment jig 1 to the longitudinal member.
The surface treatment jig 1 according to the first to third embodiments is attached to the longitudinal member.
The surface treatment jig 1 is mounted on a portion of the longitudinal member constituting the structure where there is no protrusion.
When performing a fluid introduction step and a fluid discharge step, which will be described later, the surface treatment jig 1 is reciprocated in the longitudinal direction of the longitudinal member, and is further swung around the longitudinal member.

  Since the fluid introduction process, the fluid discharge process, the fluid discharge process, and the operation thereof are the same as those of the surface treatment method according to the first embodiment, the description thereof is omitted.

Next, a surface treatment method according to the fourth embodiment of the present invention will be described.
FIG. 13 is an operation diagram of the surface treatment method according to the embodiment of the present invention.
The surface treatment method is a method for surface-treating a structural material, and includes a surface treatment jig mounting step, a fluid introduction step, and a fluid discharge step.
The surface treatment jig mounting step is a step of pressing the surface treatment jig 1 according to the fourth embodiment against the surface of the structural material.
Since the fluid introduction process and the fluid discharge process are the same as the fluid introduction process and the fluid discharge process of the surface treatment method according to the third embodiment, the description thereof is omitted.

The abrasive, paint or pig 2 mixed with the fluid flows along the flow of the fluid and flows while colliding along the surface of the longitudinal member.
When the fluid or the pig 2 with the abrasive material attached thereto is mixed in the fluid, the surface of the longitudinal member is polished with the abrasive material, and old paint and rust adhering to the surface of the longitudinal member can be removed.
When the fluid paint or the pig 2 to which the paint is attached is mixed, the paint can be applied to the surface of the longitudinal member.

If the surface treatment jig 1 according to the above-described embodiment is used, the following effects are exhibited.
A covering member 10 that hermetically surrounds the internal space H surrounding the surface of the longitudinal member T such as a circular tube or an angle member is prepared, and the first communication port P1 and the second communication port P2 communicating with the internal space H are connected to the internal space. Since H is provided at a position facing each other, fluid (for example, air) from one of the first piping 31 communicating with the first communication port P1 and the second piping 32 communicating with the second communication port P2 to the other. Is removed and old paint and rust on the surface of the longitudinal member can be removed. Moreover, the surface of the elongate member T can be painted by flowing the paint 2 or the pig 2 on which the paint is adhered to the fluid.
Further, since the first communication port P1 and the second communication port P2 are provided at a distance in the longitudinal direction, the fluid flows on the surface of the longitudinal member T in the longitudinal direction.
In addition, since at least one of the central axis of the first communication port P1 or the central axis of the second communication port P2 is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member t, the fluid is in the internal space H. It flows while turning around the longitudinal member.
In addition, an internal partition is provided that divides the internal space H into an inner internal space H1 that surrounds all or part of the surface between the two portions of the longitudinal member T and an outer internal space H2 that is located outside the inner internal space H1. Since the internal communication port P3 that connects the outer internal space H2 and the inner internal space H1 is provided in the internal partition wall, the second piping that communicates with the first piping 31 and the second communication port P2 that communicate with the first series communication port P1. When a fluid is caused to flow from one side of the pipe 32 to the other side, the fluid flows into the inner inner space H1 through the internal communication port P3 and the first series of communication ports P1, and the surface treatment of the longitudinal member can be performed.
In addition, since the partition wall that divides the internal space H into the space formed by the inner inner space H1 and the outer inner space H2 and the other space H3 is provided, the total volume of the inner inner space H1 and the outer inner space H2 is small. Therefore, the abrasive and paint mixed in the fluid do not flow into the dead space, and the amount of abrasive and paint can be saved.
Further, since the first communication port P1 and the internal communication port P3 are provided at a distance in the longitudinal direction, the fluid flows on the surface of the longitudinal member T in the longitudinal direction.
Further, since the central axis of the first series opening P1 is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member t, the fluid flows while swirling around the longitudinal member in the inner inner space H2.
In addition, as another structure, a covering member that airtightly covers an internal space in contact with a predetermined area on the surface is prepared, and a first series of communication ports and a second communication port that communicate with the internal space H are provided. Since the fluid is allowed to flow through and the fluid is discharged from the other side, the old paint or rust on the surface of the structural material is removed by flowing the abrasive or paint or the pig 2 with the abrasive or paint attached to the internal space. Or paint can be applied.

Moreover, if the surface treatment method according to the above-described embodiment is used, the following effects are exhibited.
The above-mentioned surface treatment jig 1 is attached to a longitudinal member constituting a structure such as a steel tower, and a fluid is introduced into one of the first serial port or the second communication port. Since the fluid is discharged from the other of the two communicating ports and the abrasive 2 or the paint 2 or the pig 2 with the abrasive or the paint attached thereto is mixed into the fluid, the surface treatment of the longitudinal member constituting the structure such as a steel tower is performed. be able to.
In particular, a plurality of surface treatment jigs 1 are mounted in series, and the first communication port P1 or the second communication port P2 of the surface treatment jigs 1 adjacent to each other are communicated with each other by a communication pipe 33 and arranged in series. A fluid is supplied to the first pipe 31 that communicates with the first communication port P1 of each surface treatment jig 1 or the second pipe 32 that communicates with the second communication port P2 located at both ends of the plurality of surface treatment jigs. Since the pig 2 to which the abrasive or paint or the abrasive or paint is attached is mixed in and out of the fluid, the surface treatment of the longitudinal member constituting the structure such as a steel tower can be performed.
Further, when the surface treatment jig 1 mounted on the longitudinal member T is reciprocated in the longitudinal direction, even a small surface treatment jig 1 can surface-treat a long longitudinal member.
Therefore, when rehabilitating a structure such as a steel tower, an operator can work in a bright place and workability is improved. Further, it is possible to prevent the removed paint and new removal from being scattered around.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.

It is sectional drawing of the surface treatment jig which concerns on 1st embodiment of this invention. It is a plane sectional view of the surface treatment jig concerning a first embodiment of the present invention. It is a plane sectional view of the surface treatment jig concerning a first embodiment of the present invention. It is sectional drawing of the surface treatment jig | tool which concerns on 2nd embodiment of this invention. It is a plane sectional view of the surface treatment jig concerning a second embodiment of the present invention. It is sectional drawing of the surface treatment jig | tool which concerns on 3rd embodiment of this invention. It is sectional drawing of the surface treatment jig | tool which concerns on 4th embodiment of this invention. It is a schematic diagram of the surface treatment method which concerns on 1st embodiment of this invention. It is a schematic diagram of the surface treatment method which concerns on 1st embodiment of this invention. It is a schematic diagram of the surface treatment method which concerns on 2nd embodiment of this invention. It is a schematic diagram of the surface treatment method which concerns on 3rd embodiment of this invention. It is an effect | action figure of the surface treatment method which concerns on embodiment of this invention. It is an effect | action figure of the surface treatment method which concerns on embodiment of this invention. It is a front view of a steel tower.

Explanation of symbols

H Internal space H1 Inner internal space H2 Outer internal space H3 Other spaces
P1 First communication port P2 Second communication port P3 Internal communication port 1 Surface treatment jig 2 Pig 10 Cover member 11 Seal member 12 Cylindrical member 13 Current plate 20 Internal partition wall 30 Piping 31 First piping 32 Second piping 33 Communication Piping 40 Partition wall

Claims (19)

A surface treatment jig for surface treating a longitudinal member,
A covering member that hermetically covers an internal space surrounding a surface between two locations separated in the longitudinal direction of the longitudinal member;
A first series of passages communicating the inner space to the outside of the covering member;
A second communication port communicating the internal space to the outside of the covering member;
A surface treatment jig comprising: The first communication port and the second communication port are spaced apart in the longitudinal direction of the longitudinal member;
The surface treatment jig according to claim 1. At least one of the central axis of the first communication port or the central axis of the second communication port is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member,
The surface treatment jig according to claim 1. The covering member has a pair of seal members that make each of the two portions airtight, and a cylindrical member that is connected to the pair of seal members at both ends in an airtight manner,
The surface treatment jig according to claim 1. The seal member is slidable in the longitudinal direction of the longitudinal member;
The surface treatment jig according to claim 2. A surface treatment jig for surface treating a longitudinal member,
A covering member that hermetically covers an internal space surrounding a surface between two locations separated in the longitudinal direction of the longitudinal member;
An inner partition that divides the inner space into an inner inner space that surrounds all or part of the surface of the longitudinal member between the two locations and an outer inner space located outside the inner inner space;
A first series of passages communicating the inner inner space to the outside of the covering member;
A second communication port communicating the outer internal space to the outside of the covering member;
With
The internal partition is provided with an internal communication port for communicating the outer internal space and the inner internal space;
A surface treatment jig characterized by that. The first communication port and the internal communication port are spaced apart in the longitudinal direction of the longitudinal member;
The surface treatment jig according to claim 6. The central axis of the first series of openings is eccentric with respect to the central axis extending along the longitudinal direction of the longitudinal member,
The surface treatment jig according to claim 6. The covering member has a pair of seal members that make each of the two locations airtight and a cylindrical member that is connected to the pair of seal members at both ends in an airtight manner,
The inner partition wall has an inner cylindrical member in which both ends are connected to the pair of the sealing members in an airtight manner,
The surface treatment jig according to claim 6. The seal member is slidable in the longitudinal direction of the longitudinal member;
The surface treatment jig according to claim 9. A surface treatment method for surface treating a longitudinal member,
A surface treatment jig mounting step of mounting the surface treatment jig according to claim 1 to a longitudinal member;
A fluid introduction step of introducing a fluid into one of the first series port or the second communication port;
A fluid discharging step of discharging fluid from the other of the previous first communication port or the second communication port;
A surface treatment method comprising: A surface treatment method for surface treating a longitudinal member,
A plurality of surface treatment jig mounting steps of mounting the plurality of surface treatment jigs according to claim 1 to the longitudinal member in series;
A communication port communication step for communicating the first serial port or the second communication port of the surface treatment jigs adjacent to each other;
A fluid introduction step of introducing a fluid into one of the first communication port or the second communication port of the surface treatment jig arranged in series;
A fluid discharging step of discharging a fluid from one of the first communication port or the second communication port of the surface treatment jig arranged in series;
A surface treatment method comprising: Introducing an abrasive or paint together with the fluid in the fluid introduction step;
13. The surface treatment method according to claim 11, wherein the surface treatment method is one of the following. Introducing a pig with an abrasive or paint attached together with the fluid in the fluid introduction step,
13. The surface treatment method according to claim 11, wherein the surface treatment method is one of the following. The fluid introduction step introduces air,
The fluid discharging step discharges gas by suction by negative pressure;
13. The surface treatment method according to claim 11, wherein the surface treatment method is one of the following. A surface treatment jig for surface treatment of the surface of a structural material,
A covering member that airtightly covers an internal space in contact with a predetermined region of the surface;
A first series of passages communicating the inner space to the outside of the covering member;
A second communication port communicating the internal space to the outside of the covering member;
Comprising
A surface treatment jig characterized by that. A surface treatment method for surface-treating a structural material,
A surface treatment jig mounting step of pressing the surface treatment jig according to claim 16 against the surface of the structural material;
A fluid introduction step of introducing fluid into the first series of openings;
A fluid discharge / discharge step of discharging a fluid from the second communication port;
A surface treatment method comprising: Introducing an abrasive or paint together with the fluid in the fluid introduction step;
18. The surface treatment method according to claim 17, wherein Introducing a pig with an abrasive or paint attached together with the fluid in the fluid introduction step,
18. The surface treatment method according to claim 17, wherein

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