JP2015218846A - Pipeline fastening structure and pipeline fastening method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening structure 4 and a pipeline fastening method capable of easily adapting for an increased or decreased thickness at a table block 2 and assuring a stably fastened state without increasing the number of component parts.SOLUTION: This invention relates to a fastening structure 4 for fastening a substantial cylindrical pipeline 3 to an upper surface 2a at a substantial plate-like table block 2 having a prescribed thickness comprising: a U-shaped member 41 of a substantial gate-shape formed by bending a round steel member to enclose the pipeline 3 with the table block 2 as seen from an axial direction of the pipeline to have two pillar parts 411a extending in a thickness direction of the table block 2; and two bolts 46 engaged in thread with a threaded hole 41a arranged at a pillar part 411a of the U-shaped member 41 through an open hole 2b of the table block 2 formed with an opening in a thickness direction.

Description

  The present invention relates to a pipe fastening structure and a pipe fastening method for fastening pipes arranged on a structural frame or a wall surface in, for example, a plant or a facility.

  Many pipes for circulating fluids such as gas and oil are arranged in devices used in plants, ships, factories, and the like. Conventionally, when such a pipe is fixed to a support member such as a structural frame of a building, a U bolt corresponding to the outer diameter of the pipe is covered with the pipe, and the threaded portion of the U bolt is inserted into the through hole of the support member. After being inserted into the pipe, the pipe is sandwiched between the U bolt and the support member by screwing the nut into the thread portion (see Patent Document 1).

  Further, for example, as shown in FIG. 6 showing a front view of a conventional pipe fastening structure, a positioning nut 62 screwed onto the base side of the thread 61 in the U bolt 60 is used to move the U from one surface of the gantry 2. The space | interval to the inner surface of the curved part in the volt | bolt 60 is made substantially constant. Thereby, the nut 63 is prevented from being over-tightened, and the U-bolt 60 is prevented from excessively pressing the pipe 3 formed of a steel pipe or the like. Further, in the case where insulation is required, as shown in FIG. 6, by providing an insulating washer 64, a pedestal plate 65, an insulating sheet 66, and a thin insulating sleeve 67, the U bolt 60 and the frame 2 are provided. And conduction between the pedestal plate 65 and the gantry 2 are interrupted.

  By the way, such a U-bolt requires time and effort to align the positioning nut that regulates the mounting position of the U-bolt, and the U-bolt from one surface of the support member due to the presence or absence of the positioning nut and variations in the mounting position. The distance to the curved portion is likely to vary. For this reason, when fastening a pipe with a plurality of U bolts arranged at predetermined intervals along the axial direction of the pipe, the position at which the U bolt presses the pipe and the load at which the U bolt presses the pipe is different for each U bolt. Unlikely, there is a possibility that a stable fastening state cannot be secured due to distortion in the piping.

  In addition, if the thickness of the support member is changed to be thick at the construction stage, the length of the thread portion exposed from the support member may be insufficient. For this reason, when the thickness of the support member is changed, there is a problem that the U-bolt has to be manufactured again according to the thickness of the support member.

JP 2004-190815 A

  In view of the above-described problems, the present invention can easily cope with an increase or decrease in the thickness of a support member, and can secure a stable fastening state without increasing the number of parts, and a pipe fastening method. The purpose is to provide.

  This invention is a pipe fastening structure that fastens a substantially cylindrical pipe to one surface of a substantially flat support member having a predetermined thickness, in an axial view as viewed from the axial direction of the pipe. The columnar member is bent so as to surround the pipe with the support member, and the surrounding member is formed in a substantially portal shape having two legs extending in the thickness direction of the support member, and the opening is formed in the thickness direction. It is characterized by comprising two bolts screwed into screw holes provided in the leg portions of the surrounding member through the through holes of the supporting member.

The pipe may be a substantially cylindrical pipe or a substantially elliptical pipe.
The columnar member can be a round bar or a square bar.
The substantially portal shape may be a substantially U shape with an opening on the support member side in an axial view, or a substantially U shape with an opening on the support member side.

According to the present invention, it is possible to easily cope with an increase or decrease in the thickness of the support member, and it is possible to ensure a stable fastening state without increasing the number of parts.
Specifically, by adopting a configuration in which a bolt is screwed into each screw hole provided in the leg portion of the surrounding member, the pipe fastening structure uses a bolt having an appropriate nominal length, It is possible to easily cope with support members having various thicknesses.

  That is, the pipe fastening structure can easily cope with an increase or decrease in the thickness of the support member by exchanging with bolts having different nominal lengths. For this reason, the pipe fastening structure can eliminate the need to recreate the surrounding member even when the thickness of the support member is changed.

  And since a leg part is not inserted in the through-hole of a support member with respect to the U volt | bolt which inserts a thread part into the through-hole of a support member, an surrounding member opposes one surface of a support member in the thickness direction. The interval between the portions can be made substantially constant. As a result, the surrounding member can stably secure a gap between the piping and the surrounding member without using a positioning nut that adjusts the mounting position, or can press the piping with a desired constant load. .

  For this reason, for example, even when the pipe is fastened with a plurality of pipe fastening structures arranged along the axial direction of the pipe, the position at which the surrounding member presses the pipe, and the load at which the surrounding member presses the pipe, It becomes substantially equivalent for every pipe fastening structure, and a stable fastening state can be secured.

In addition, in the case of a pipe with a small outer diameter, for example, if the pipe is fastened with a U-bolt equipped with a positioning nut, the end of the positioning nut and the pipe interfere with each other and the pipe with a small outer diameter cannot be fastened. It was.
On the other hand, since the pipe fastening structure can eliminate the positioning nut, it is possible to fasten a pipe having a small outer diameter without causing interference or the like.

Furthermore, since the head portion of the bolt is exposed on the other surface side of the support member, the pipe fastening structure is compared with the U bolt where the thread portion and the nut are exposed on the other surface side of the support member. A good-looking fastening state can be realized.
Therefore, the pipe fastening structure can easily cope with the increase and decrease in the thickness of the support member by the surrounding member and the bolt, and can stably fasten the pipe without increasing the number of parts.

  As an aspect of the present invention, the surrounding member includes a substantially flat plate member having two bolt insertion holes that allow the bolt to pass therethrough and interposed between a leg portion of the surrounding member and the support member. A low friction resin member having a low friction coefficient can be provided on a surface of the flat plate member facing the pipe and a surface of the flat plate member facing the pipe.

  The low friction resin member can be made of a synthetic resin having a low friction coefficient such as a fluorine resin. The low friction resin member can be provided by fitting, sticking, or lining with the surrounding member and the flat plate member.

According to the present invention, the pipe fastening structure can more reliably prevent damage to the surrounding member and the pipe and loosening of the bolt.
Specifically, for example, when the pipe is formed of a steel pipe, the steel pipe thermally contracts with a change in the outside air temperature, so that the pipe fastening structure comes into contact with the surrounding member and the steel pipe with the thermal contraction of the steel pipe. The surrounding member is pulled in the axial direction. For this reason, a tensile load in the axial direction acts on the leg portion of the surrounding member and the shaft portion of the bolt, and there is a possibility that the leg portion is damaged or the bolt is loosened.

  Therefore, by providing the surrounding member and the flat plate member with the low friction resin member, the pipe fastening structure can smoothly perform thermal contraction of the piping without the surrounding member being pulled in the axial direction. For this reason, the piping fastening structure can prevent the breakage of the leg portion and the loosening of the bolt due to the action of the tensile load.

  Furthermore, by providing the low friction resin member on the flat plate member having the bolt insertion hole, the pipe fastening structure can easily align the low friction resin member of the flat plate member with the low friction resin member of the surrounding member. it can. Thereby, since the pipe fastening structure can reliably face the low friction resin member of the surrounding member and the low friction resin member of the flat plate member, the gap between the piping and the surrounding member can be stably secured, or The pipe can be pressed with a constant load.

  In addition, since there is no thread on the outer peripheral surface of the leg portion of the surrounding member, the pipe fastening structure can mount the low friction resin member over a wide range of the surrounding member including the leg portion that is not bent or bent. . Thereby, for example, even if it is piping with a small outer diameter, the piping fastening structure can ensure more reliably the contact area of the low friction resin member and piping.

For this reason, regardless of the outer diameter of the pipe, the pipe fastening structure can more reliably prevent a tensile load from being applied to the surrounding member and the pipe due to the thermal contraction of the pipe.
Therefore, since the pipe fastening structure includes the low friction resin member, damage to the surrounding member and the pipe and loosening of the bolt can be prevented more reliably.

  Further, as an aspect of the present invention, it is interposed between the bolt and the support member to allow the bolt to be inserted, and is interposed between the first insulating washer having insulation and the surrounding member and the support member. And the second insulating washer having an insulating property while allowing the bolt to be inserted, and the first insulating washer and the second insulating washer in the bolt in a state where the pipe is fastened to the support member. An insulating film having an insulating property can be formed in the range of the corresponding shaft portion between the two.

The first insulating washer and the second insulating washer are made of an insulating resin washer, a washer in which an insulating sheet having an insulating property is attached to at least a surface of the metal washer facing the support member, or a lining. It can be a washer or the like on which an insulating film having insulating properties is formed.
The insulating film is a synthetic resin such as an insulating fluorine-based resin, and can be formed by lining such as baking or thermal spraying.

According to this invention, the pipe fastening structure can easily cope with the increase / decrease in the thickness of the support member, and can ensure stable insulation without increasing the number of parts.
Specifically, when the material of the pipe and the material of the pipe fastening structure are different metals, the pipe fastening structure is required to have insulation so as not to be electrically connected to the support member in order to ensure corrosion resistance against electric corrosion. Sometimes.

  For example, in the case of a U-bolt, conduction between the threaded portion of the U-bolt and the support member is blocked by a thin insulating sleeve inserted into the through hole of the support member. However, since the thin insulating sleeve is easily bent with respect to an external force, it may be damaged by contact with the through hole in the construction process or contact with the through hole due to vibration such as an earthquake.

  On the other hand, by forming an insulating film on the shaft portion of the bolt that is difficult to bend even when an external force is applied, it is possible to easily configure an insulating bolt that is unlikely to crack or peel off the insulating film. Furthermore, the range in which the insulating film is formed in the shaft portion of the bolt is not screwed into the screw hole of the surrounding member.

  For this reason, even if it is a case where an insulating film is formed in the axial part of all the screws, for example, an insulating film does not peel with the screwing to a screw hole. Thereby, the piping fastening structure can ensure a fastening state and insulation stably.

  In addition, since the pipe fastening structure can increase the seating surface area of the support member by the first insulating washer and the second insulating washer, a more stable fastening state can be ensured.

  Therefore, the pipe fastening structure can easily cope with the increase / decrease in the thickness of the support member and the number of parts by the bolt in which the insulating film is formed on the shaft portion between the first insulating washer and the second insulating washer. A stable fastening state, corrosion resistance, and insulation can be ensured without any problems.

Further, as an aspect of the present invention, the first washer that is interposed between the bolt and the support member, and that allows the bolt to be inserted, and is interposed between the surrounding member and the support member, and the bolt is inserted. And a second washer that allows
The first washer and the second washer can be a plain washer, a spring washer, a square washer, or a washer that combines these.

According to the present invention, the pipe fastening structure can fasten the pipe more stably regardless of the outer diameter of the pipe.
Specifically, by providing the first washer and the second washer, the pipe fastening structure can increase the seating surface area of the support member, and thus can secure a more stable fastening state.

Furthermore, since the thickness of the second washer can be made thinner than the thickness of the positioning nut, the pipe fastening structure is composed of the second washer and the pipe even when fastening a pipe having a small outer diameter to the support member. Can be prevented from interfering.
Therefore, since the pipe fastening structure includes the first washer and the second washer, the pipe can be fastened more stably regardless of the outer diameter of the pipe.

  The present invention also includes a step of arranging a substantially cylindrical pipe on one surface of a substantially flat support member having a predetermined thickness and having a through-hole formed in the thickness direction, and the axial direction of the pipe. As seen from the axial direction, a surrounding member formed in a substantially gate shape having two legs extending in the thickness direction of the support member by bending the columnar member is surrounded by the support member. A pipe fastening method comprising: covering the pipe with the pipe; and screwing two bolts into the screw holes provided in the two leg portions of the surrounding member via the through holes of the support member. It is characterized by being.

  According to the present invention, a pipe fastening method that can easily cope with an increase / decrease in the thickness of the support member and can easily fasten the pipe and the support member without increasing the number of parts to ensure a stable fastening state. Can be provided.

  According to the present invention, it is possible to provide a pipe fastening structure and a pipe fastening method that can easily cope with an increase or decrease in the thickness of a support member and can ensure a stable fastening state without increasing the number of parts.

The external appearance perspective view which shows the external appearance from upper direction in a piping fastening structure. The front view which shows the external appearance from the front view in a piping fastening structure. The disassembled perspective view which shows the external appearance from the downward direction in each component of a fastening structure. The principal part sectional drawing which shows the cross section of the width direction in the principal part of a piping fastening structure. The principal part sectional drawing which shows the width direction cross section of the principal part in the piping fastening structure of Example 2. FIG. The front view which shows the external appearance from the front view in the conventional piping fastening structure.

  An embodiment of the present invention will be described below with reference to the drawings.

  1 shows an external perspective view of the pipe fastening structure 1 from above, FIG. 2 shows a front view of the pipe fastening structure 1 from a front view, and FIG. 3 shows the components of the fastening structure 4 from below. 4 is an exploded perspective view of FIG. 4, and FIG. 4 is a cross-sectional view of the main part in the width direction Y of the main part of the pipe fastening structure 1.

Further, in FIG. 1, an arrow X indicates the front-rear direction (hereinafter referred to as “front-rear direction X”), and an arrow Y indicates the width direction (hereinafter referred to as “width direction Y”). Further, the upper side in FIG. 1 is the upper side, and the lower side in FIG. 1 is the lower side.
In addition, in order to simplify the illustration in FIG. 1, only a part of the gantry 2 and the pipe 3 are illustrated.

  As shown in FIGS. 1 and 2, the pipe fastening structure 1 has a plurality of substantially flat bases 2, a pipe 3 arranged on the upper surface 2a of the base 2, and a plurality of pipes arranged at predetermined intervals in the front-rear direction X. The fastening structure 4 is used to fasten the gantry 2 and the pipe 3.

  As shown in FIGS. 1 and 2, the gantry 2 has a substantially flat plate shape having a predetermined thickness in the vertical direction, and is, for example, a ship deck. As shown in FIG. 4, a through hole 2b having a diameter larger than a nominal diameter of a bolt 46 described later is formed in the gantry 2 in the vertical direction.

Although not shown in detail, two through holes 2b are formed in the width direction Y at positions spaced apart from the outer diameter of the pipe 3, and a plurality of through holes 2b are formed at predetermined intervals in the front-rear direction X. doing.
As shown in FIGS. 1 and 2, the pipe 3 is a substantially true cylindrical steel pipe having a predetermined inner and outer diameter with the front-rear direction X as an axial direction. Forming.

As shown in FIGS. 2 and 3, the fastening structure 4 includes a U-shaped member 41, two square washers 42, a base plate 43, two plain washers 44, two spring washers 45, and two bolts 46. It is composed.
Specifically, the fastening structure 4 includes a U-shaped member 41, a square washer 42, and a pedestal plate 43 arranged in this order from above on the upper surface 2 a side of the gantry 2, and a flat washer on the lower surface 2 c side of the gantry 2. 44, a spring washer 45, and a bolt 46 are arranged in this order from above.

As shown in FIGS. 2 and 3, the U-shaped member 41 includes a substantially U-shaped U-shaped main body portion 411 having an opening on the lower side, and a slide member 412 disposed along the inner surface of the U-shaped main body portion 411. It consists of and.
The U-shaped main body portion 411 includes two columnar portions 411a extending in the vertical direction with an interval in the width direction Y slightly larger than the outer diameter of the pipe 3, and the outer peripheral surface of the pipe 3 between the upper ends of the two columnar portions 411a. And a curved portion 411b curved in a substantially semicircular shape so as to be bridged along the same shape.

  Further, as shown in FIGS. 3 and 4, each of the two columnar portions 411 a in the U-shaped main body 411 is formed with one screw hole 41 a that allows the bolt 46 to be screwed from below. The U-shaped main body 411 is made of SS material or SUS material, and is formed by bending a round steel material having a predetermined diameter.

  The slide member 412 has a self-lubricating property and flexibility, is a substantially columnar shape having a smooth surface (not shown) with a low friction coefficient facing the pipe 3, and is a PTFE material containing a filler having a high compressive strength. It is composed.

  The slide member 412 is fitted along fitting grooves (not shown) formed in the inner surfaces of the columnar portion 411a and the curved portion 411b in the U-shaped main body portion 411, and the U-shape is obtained by caulking the fitting groove. It is fixed to the main body 411.

  The U-shaped member 41 has an inner bottom height H from the lower end of the columnar portion 411a to the inner surface of the portion facing the pedestal plate 43. The upper surface 2a of the pedestal 2 in a state where the pipe 3 is placed on the pedestal plate 43. The height from the height of the pipe 3 to the upper end of the pipe 3 is substantially the same as the height obtained by subtracting the thickness of the square washer 42 and the base plate 43.

The square washer 42 has a predetermined thickness in the vertical direction and is an approximately rectangular washer in plan view having an opening (not shown) that allows the bolt 46 to be inserted, and is made of SS material or SUS material. .
The pedestal plate 43 includes a substantially flat plate main body 431 and a slide sheet 432 attached to the approximate center in the width direction Y on the upper surface of the plate main body 431.

  The plate main body 431 has a substantially flat plate shape that is long in the width direction Y, communicates with the screw hole 41a of the U-shaped member 41 through the opening of the square washer 42, and allows two bolts to be inserted. A hole 43a is formed in the vertical direction. The plate body 431 is made of SS material or SUS material.

  The slide sheet 432 has a self-lubricating property and a substantially sheet shape having a smooth surface (not shown) with a low friction coefficient facing the pipe 3, and is made of a PTFE material containing a filler having a high compressive strength. .

The flat washer 44 is a substantially circular washer in plan view having an opening (not shown) that allows the insertion of the shaft portion 46a of the bolt 46, and is made of SS material or SUS material.
The spring washer 45 has an opening (not shown) that allows the shaft portion 46a of the bolt 46 to be inserted, and is a substantially annular washer in plan view with a part opened in the circumferential direction, and is made of a spring steel material. Yes.

  The bolt 46 is a hexagonal bolt having a half-screw shaft portion 46a, and is made of SS material or SUS material. The bolt 46 has a configuration in which no thread is provided in the range of the shaft portion 46a between the square washer 42 and the flat washer 44 when the pipe 3 is fastened to the gantry 2.

Next, a pipe fastening method for fastening the pipe 3 to the gantry 2 using the fastening structure 4 having such a configuration will be described in detail.
First, after placing the pedestal plate 43 on the upper surface 2a of the pedestal 2 so that the bolt insertion holes 43a of the pedestal plate 43 and the through holes 2b of the pedestal 2 communicate with each other, the piping 3 is placed on the slide sheet 432 of the pedestal plate 43. Place.

  Further, the square washer 42 is placed on the pedestal plate 43 so that the bolt insertion hole 43 a of the pedestal plate 43 communicates with the opening of the square washer 42. Then, the U-shaped member 41 is placed on the square washer 42 so as to cover the pipe 3 from above.

  Thereafter, a bolt 46 with a spring washer 45 and a flat washer 44 is screwed into the screw hole 41a of the U-shaped member 41 through the through-hole 2b of the mount 2 from below the mount 2, and a specified tightening torque. Then, the pipe 3 is fastened to the gantry 2.

The fastening structure 4 and the pipe fastening method configured as described above can easily cope with an increase or decrease in the thickness of the gantry 2 and can ensure a stable fastening state without increasing the number of parts.
Specifically, the fastening structure 4 has an appropriate nominal length by adopting a configuration in which the bolts 46 are screwed into the screw holes 41a provided in the columnar portion 411a of the U-shaped member 41, respectively. By using the bolts 46, it is possible to easily cope with the gantry 2 having various thicknesses.

  That is, the fastening structure 4 can easily cope with an increase or decrease in the thickness of the gantry 2 by replacing the bolts 46 with different nominal lengths. For this reason, even if the fastening structure 4 is a case where the thickness of the mount frame 2 is changed, it is unnecessary to remake the U-shaped member 41.

  And since the columnar part 411a is not inserted into the through-hole 2b of the gantry 2 with respect to the U bolt that inserts the threaded portion into the through-hole 2b of the gantry 2, the U-shaped member 41 has an inner bottom height H substantially reduced. Can be a certain height. As a result, the U-shaped member 41 stably secures a gap between the pipe 3 and the U-shaped member 41 without using a positioning nut that adjusts the mounting position, or the pipe 3 is desired. It can be pressed with a load of.

  For this reason, even if it is a case where the piping 3 is fastened with the fastening structure 4 arrange | positioned along the front-back direction X, the position where the U-shaped member 41 presses the piping 3 and the U-shaped member 41 are the piping 3. The load which presses becomes substantially equivalent for every fastening structure 4, and the stable fastening state can be ensured.

In addition, in the case of the pipe 3 having a small outer diameter, for example, when the pipe 3 is fastened with a U bolt provided with a positioning nut, the end of the positioning nut interferes with the pipe 3 and the pipe 3 having a small outer diameter. Could not be concluded.
On the other hand, since the fastening structure 4 can eliminate a positioning nut, the pipe 3 having a small outer diameter can be fastened without causing interference or the like.

Furthermore, since the head of the bolt 46 is exposed on the lower surface 2c side of the gantry 2, the fastening structure 4 is more resistant to corrosion than the U-bolt in which the thread portion and the nut are exposed on the lower surface 2c side of the gantry 2. It is possible to achieve a fastening state that is excellent in appearance and good in appearance.
Therefore, the fastening structure 4 can easily cope with the increase / decrease in the thickness of the gantry 2 by the U-shaped member 41 and the bolt 46, and can stably fasten the pipe 3 without increasing the number of parts. .

  In addition, the slide plate 432 is provided on the base plate 43 and the slide member 412 is provided on the U-shaped member 41, so that the fastening structure 4 can damage the pipe 3 and the U-shaped member 41 or loosen the bolt 46. Can be prevented more reliably.

  Specifically, for example, when the pipe 3 is formed of a steel pipe, the pipe 3 is thermally contracted with a change in the outside air temperature, and therefore, the fastening structure 4 is a U-shaped member 41 with the thermal contraction of the pipe 3. When the pipe 3 comes into contact, the U-shaped member 41 is pulled in the front-rear direction X. For this reason, the tensile load in the front-rear direction X acts on the columnar portion 411a of the U-shaped member 41 and the shaft portion 46a of the bolt 46, and there is a possibility that the columnar portion 411a is damaged or the bolt 46 is loosened.

  Therefore, the U-shaped member 41 is provided with the slide member 412 and the pedestal plate 43 is provided with the slide member 412, so that the fastening structure 4 can be connected to the piping without the U-shaped member 41 being pulled in the front-rear direction X. 3 can be performed smoothly. Therefore, the fastening structure 4 can prevent the columnar portion 411a from being damaged or the bolt 46 from being loosened due to the action of a tensile load.

  Furthermore, by providing the pedestal plate 43 having the bolt insertion holes 43 a with the slide sheet 432, the fastening structure 4 can easily align the slide sheet 432 of the pedestal plate 43 with respect to the slide member 412 of the U-shaped member 41. can do.

  Thereby, since the fastening structure 4 can reliably oppose the slide member 412 of the U-shaped member 41 and the slide sheet 432 of the base plate 43, the clearance gap between the piping 3 and the U-shaped member 41 is made. It can be ensured stably or the pipe 3 can be pressed with a desired constant load.

  In addition, since there is no thread on the outer peripheral surface of the columnar part 411a in the U-shaped member 41, the fastening structure 4 has the slide member 412 in a wide range of the U-shaped member 41 including the columnar part 411a that is not curved. Can be installed. Thereby, for example, even if the outer diameter of the pipe 3 is small, the fastening structure 4 can ensure the contact area between the slide member 412 and the pipe 3 more reliably.

For this reason, regardless of the outer diameter of the pipe 3, the fastening structure 4 can more reliably prevent a tensile load from being applied to the pipe 3 and the U-shaped member 41 due to thermal contraction of the pipe 3.
Therefore, the fastening structure 4 includes the slide member 412 and the slide sheet 432, so that damage to the pipe 3 and the U-shaped member 41 and loosening of the bolt 46 can be prevented more reliably.

  In addition, the fastening structure 4 includes the plain washer 44 and the spring washer 45 interposed between the bolt 46 and the gantry 2 and the square washer 42 interposed between the U-shaped member 41 and the gantry 2. Regardless of the outer diameter of the pipe 3, the pipe 3 can be fastened more stably.

  Specifically, by providing the flat washer 44, the spring washer 45, and the square washer 42, the fastening structure 4 can increase the seating surface area of the gantry 2, and thus secure a more stable fastening state. can do. For this reason, the fastening structure 4 can prevent the bolt 46 from loosening.

Furthermore, since the thickness of the square washer 42 can be made thinner than the thickness of the positioning nut, the fastening structure 4 is connected to the square washer 42 and the pipe even when the pipe 3 having a small outer diameter is fastened to the gantry 2. 3 can be prevented from interfering with each other.
Therefore, the fastening structure 4 includes the flat washer 44, the spring washer 45, and the square washer 42, so that the pipe 3 can be fastened more stably regardless of the outer diameter of the pipe 3.

  Also, a step of placing the pipe 3 on the upper surface 2a of the gantry 2 having the through hole 2b, a step of covering the pipe 3 with the U-shaped member 41 so as to surround the pipe 3 with the gantry 2, and a U-shaped member The step of screwing two bolts 46 into the screw holes 41a of the base 41 through the through holes 2b of the base 2 makes it possible to easily cope with an increase or decrease in the thickness of the base 2 and without increasing the number of parts. And the fastening method which can fasten the piping 3 and the mount frame 2 easily and can ensure the stable fastening state can be provided.

In the first embodiment, the pipe 3 has a substantially true cylindrical shape. However, the pipe 3 is not limited to this, and may be a pipe having a substantially elliptic cylindrical shape.
Moreover, although the round steel material was bent and the U-shaped member 41 was formed, it is not limited to this, A square member may be bent and a U-shaped member may be formed if it can be bent.

  In addition, although the U-shaped member 41 formed in a substantially U shape has been described as the surrounding member for fastening the piping 3 to the gantry 2, the present invention is not limited thereto, and the piping 3 is enclosed with the gantry 2 in a front view. Any suitable shape may be used as long as it is a substantially portal shape. For example, it is good also as a substantially U-shaped surrounding member which the lower side opened in the front view.

  Further, the U-shaped member 41 is formed by fitting and fixing the slide member 412 to the U-shaped main body 411. However, the present invention is not limited to this, and a synthetic resin film having a self-lubricating property and a low friction coefficient is formed by lining. It is good also as the U-shaped member 41 formed in the main-body part 411.

  Further, although the pedestal plate 43 with the slide sheet 432 attached thereto is not limited to this, the pedestal plate 43 may be a pedestal plate 43 formed on the plate body 431 by a synthetic resin film having a self-lubricating low friction coefficient. Good.

In addition, the slide member 412 and the slide sheet 432 are made of a PTFE material containing a filler having a high compressive strength. .
Further, although the half screw bolt 46 is used, the present invention is not limited to this, and a full screw bolt 46 may be used.

Next, a fastening structure 5 provided with an insulating means for blocking conduction with the gantry 2 will be described in detail with reference to FIG.
FIG. 5 shows a partial cross-sectional view of the main part of the pipe fastening structure 1 of the second embodiment.
The same configurations as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 5, the fastening structure 5 according to the second embodiment includes a U-shaped member 51, an insulating square washer 52, a pedestal plate 53, an insulating sheet 54, an insulating flat washer 55, a flat washer 56, a spring washer 57, and Insulating bolt 58 is used.

  Specifically, the fastening structure 5 includes, in this order, the U-shaped member 51 having the screw hole 51a in the columnar portion 511a, the insulating square washer 52, the pedestal plate 53, and the insulating sheet 54 in this order on the upper surface 2a side of the gantry 2. The insulating flat washer 55, the flat washer 56, the spring washer 57, and the insulating bolt 58 are arranged in this order from above on the lower surface 2c side of the gantry 2.

  The U-shaped member 51 has the same configuration as that of the U-shaped member 41 in the above-described first embodiment, but is within the difference between the thickness of the square washer 42 in the first embodiment and the thickness of an insulating flat washer 55 described later. The bottom height H is different.

The insulating square washer 52 is composed of a square washer 521 having a substantially rectangular shape in plan view, and an insulating sheet 522 having insulation attached to the lower surface of the square washer 521.
Since the square washer 521 has the same configuration as that of the first embodiment, detailed description thereof is omitted.
The insulating sheet 522 has a substantially sheet shape formed in a size substantially equal to that of the square washer 521 in a plan view, and is made of a PTFE material.

  The pedestal plate 53 includes a substantially flat plate main body 531 in which a bolt insertion hole 53a that allows the insertion of the insulating bolt 58 is formed in the vertical direction, and a slide sheet that is attached to a substantially center in the width direction Y on the upper surface of the plate main body 531. (Not shown).

Since the plate main body 531 and the slide sheet have the same configuration as that of the first embodiment, detailed description thereof is omitted.
The insulating sheet 54 is formed to be approximately the same size as the entire surface of the lower surface of the plate main body 531 and has a substantially sheet shape having an insulating property, and is made of PTFE material, FRP material, or rubber.

The insulating flat washer 55 is a substantially annular washer in plan view having an opening (not shown) that allows insertion of the shaft portion 58a of the insulating bolt 58, and is made of an FRP material having insulating properties.
Since the flat washer 56 and the spring washer 57 have the same configuration as the flat washer 44 and the spring washer 45 in the first embodiment, detailed description thereof will be omitted.

  The insulating bolt 58 is a hexagonal bolt having a half-screw shaft portion 58a, and is made of SS material or SUS material. The insulating bolt 58 has a configuration in which no thread is provided in the range of the shaft portion 58 a corresponding to the space between the insulating square washer 52 and the insulating flat washer 55 when the pipe 3 is fastened to the gantry 2.

The shaft diameter of the shaft portion 58a of the insulating bolt 58 where the thread is not provided is smaller than the shaft diameter of the thread portion. Further, an insulating film 58b having an insulating property is formed along the peripheral surface in a portion where no thread is provided.
The insulating film 58b is a thin film of a fluororesin such as a PTFE material, and is formed by lining such as baking. The insulating coating 58b is formed with a film thickness such that the shaft diameter of the portion not provided with the thread is substantially the same as the shaft diameter of the thread portion.

The fastening structure 5 configured as described above can easily cope with the increase and decrease of the thickness of the support base 2 and can ensure stable insulation without increasing the number of parts.
Specifically, by forming the insulating film 58b on the shaft portion 58a that is difficult to bend even when an external force is applied, the insulating bolt 58 in which the insulating film 58b is not easily cracked or peeled off can be easily configured. Further, the range in which the insulating film 58 b is formed in the shaft portion 58 a of the insulating bolt 58 is not screwed into the screw hole 51 a of the U-shaped member 51.

  For this reason, for example, even when the insulating film 58b is formed on the shaft portion 58a of all the screws, the insulating film 58b does not peel off when screwed into the screw hole 51a. Thereby, the fastening structure 5 can ensure a fastening state and insulation stably.

In addition, since the fastening structure 5 can increase the seating surface area of the gantry 2 by the insulating square washer 52 and the insulating flat washer 55, a more stable fastening state can be secured. For this reason, the fastening structure 5 can prevent the insulation bolt 58 from loosening.
Therefore, the fastening structure 5 can easily cope with the thickness increase / decrease in the gantry 2 by the insulating bolt 58 formed with the insulating film 58b, and has a stable fastening state, corrosion resistance, and insulation without increasing the number of parts. Can be secured.

In Example 2 described above, the insulating sheet 522 is attached to the lower surface of the square washer 521 to form the insulating square washer 52. However, the present invention is not limited to this, and an insulating film having an insulating property is formed by lining the square washer 521. An insulating angle washer formed on the lower surface or an insulating angle washer formed of a synthetic resin having an insulating property may be used.
In addition, the pedestal plate 53 and the insulating sheet 54 are configured separately. However, the present invention is not limited to this, and the insulating plate 54 may be attached to the lower surface of the pedestal plate 53 to configure the insulating plate. Or it is good also as an insulating plate which formed the insulating film which has insulation on the lower surface of the base plate 53 by lining.

Moreover, you may form the insulating film which has insulation with respect to the U-shaped main-body part 511 in the U-shaped member 51 by lining.
Further, although the insulating coating 58b is formed so that the shaft diameter of the portion of the shaft portion 58b where the screw thread is not provided is substantially the same as the shaft diameter of the screw thread portion, the present invention is not limited to this, and the screw thread is provided. The insulating coating 58b may be formed along the peripheral surface of the portion where no screw thread is provided in the shaft portion 58b where the shaft diameter of the non-threaded portion and the shaft diameter of the threaded portion are substantially the same.

  Further, although the half-screw insulation bolt 58 is used, the invention is not limited to this, and a full-screw insulation bolt 58 may be used. At this time, the insulating bolt 58 forms an insulating film 58b after shaving the thread in the range of the shaft portion 58a between the insulating square washer 52 and the insulating flat washer 55. Alternatively, the insulating film 58b may be formed on the thread in the range of the shaft portion 58a between the insulating square washer 52 and the insulating flat washer 55.

In correspondence between the configuration of the present invention and the above-described embodiment,
The support member of the present invention corresponds to the gantry 2 of the embodiment,
Similarly,
One surface of the support member corresponds to the upper surface 2a of the gantry 2;
The pipe fastening structure corresponds to the fastening structure 4 and the fastening structure 5,
The axial direction of the pipe corresponds to the longitudinal direction X,
Columnar members correspond to round steel materials,
The thickness direction of the support member corresponds to the vertical direction,
The legs correspond to the columnar part 411a and the columnar part 511a,
The surrounding member corresponds to the U-shaped member 41 and the U-shaped member 51,
The bolt corresponds to the bolt 46 and the insulating bolt 58,
The flat plate member corresponds to the base plate 43 and the base plate 53,
The low friction resin member corresponds to the slide member 412 and the slide sheet 432,
The first insulating washer corresponds to the insulating flat washer 55,
The second insulating washer corresponds to the insulating square washer 52,
The first washer corresponds to the flat washer 44 and the spring washer 45,
The second washer corresponds to the square washer 42,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

2 ... pedestal 2a ... upper surface 2b ... through hole 3 ... piping 4 ... fastening structure 5 ... fastening structure 41 ... U-shaped member 41a ... screw hole 42 ... square washer 43 ... pedestal plate 43a ... bolt insertion hole 44 ... flat washer 45 ... Spring washer 46 ... Bolt 51 ... U-shaped member 51a ... Screw hole 52 ... Insulating square washer 53 ... Base plate 53a ... Bolt insertion hole 55 ... Insulating flat washer 58 ... Insulating bolt 58a ... Shaft 58b ... Insulating film 411a ... Columnar portion 412 ... Slide member 432 ... Slide sheet 511a ... Columnar portion X ... Front-back direction

Claims (5)

A pipe fastening structure for fastening a substantially cylindrical pipe to one surface of a substantially flat support member having a predetermined thickness,
When viewed from the axial direction of the pipe, the columnar member is bent so as to surround the pipe with the support member, and has a substantially portal shape having two legs extending in the thickness direction of the support member. Go member formed in,
A pipe fastening structure constituted by two bolts screwed into a screw hole provided in the leg portion of the surrounding member via a through hole of the support member formed in the thickness direction. And having two bolt insertion holes that allow the bolts to pass therethrough, and a substantially flat plate member interposed between the legs of the surrounding member and the support member,
On the surface of the surrounding member that faces the piping, and the surface of the flat plate member that faces the piping,
The pipe fastening structure according to claim 1, comprising a low friction resin member having a low friction coefficient. A first insulating washer interposed between the bolt and the support member to allow the bolt to be inserted and to have an insulating property;
Interposing between the surrounding member and the support member, allowing the insertion of the bolt, and comprising a second insulating washer having insulation,
In a state where the pipe is fastened to the support member, in the range of the shaft portion corresponding to the space between the first insulating washer and the second insulating washer in the bolt,
The piping fastening structure according to claim 1 or 2, wherein an insulating film having insulating properties is formed. A first washer that is interposed between the bolt and the support member and allows the bolt to be inserted;
The pipe fastening structure according to claim 1 or 2, further comprising a second washer that is interposed between the surrounding member and the support member and allows the bolt to pass therethrough. A step of arranging a substantially cylindrical pipe on one surface of a substantially flat support member having a predetermined thickness and having a through-hole opened in the thickness direction;
In the axial view as viewed from the axial direction of the pipe, the surrounding member formed in a substantially portal shape having two legs extending in the thickness direction of the support member by bending the columnar member, Covering the pipe so as to surround the pipe;
A pipe fastening method comprising: screwing two bolts into the screw holes provided in the two leg portions of the surrounding member through the through holes of the support member.

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