JP2017061945A - Piping fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a U-bolt which stably holds a slide member, and can prevent a fall of the slide member caused by thermal shrinkage.SOLUTION: A U-bolt 6 fixes piping 3 to an upper face 2a of a pedestal 2. The U-bolt 6 is constituted of: a substantially-U shaped bolt main body 61 which is integrally formed of a bolt curved part 612 which is curved along an external peripheral face of the piping 3, and a pair of bolt leg parts 611 extending from the bolt curved part 612; a slide member 62 which is fixed to an opposing face side of the bolt main body 61 opposing the piping 3, and low in a friction coefficient; and a holding body 63 which holds the vicinity of an end part of the slide member 62 together with the bolt leg parts 611. A lower face which abuts on an upper face 51a of a plate main body 51, and an upper end face which abuts on an end face of the slide member 62 in a state of being screwed into the bolt leg parts 611 are formed at the holding body 63.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pipe fixing structure that fixes a pipe through which a fluid flows, for example, in a tanker or a plant to a structural housing or a wall surface.

  In plants, ships, factories, and the like, a large number of pipes through which fluids such as gas and oil circulate are arranged on a structural frame, a wall surface, and the like. Such a pipe is fixed to a support member such as a structural frame of a building by using a pipe fixing structure such as a U bolt according to the outer diameter of the pipe.

  Furthermore, when the pipe thermally expands in the axial direction of the pipe due to the temperature of the fluid or the outside air temperature, the pipe fixing structure has a low friction at the part in contact with the pipe in order to smoothly perform the thermal expansion of the pipe. A coefficient sliding member may be provided.

  For example, the pipe fixing structure (U-shaped electrical insulation bolt 1 for supporting metal pipe) of Patent Document 1 is made of a metal U-shaped member (U-shaped bolt body 2) formed in a substantially U-shape, A sliding member (electrical insulating member 6) made of PTFE having a low coefficient of friction mounted on the curved portion (curved portion 4) of the U-shaped member.

  The sliding member is fitted to the U-shaped member by fitting the fitting groove portion (groove 5 of the U-shaped bolt body 2) recessed in the U-shaped member and caulking the U-shaped member side. It is fixed. Thereby, in patent document 1, it is supposed that it will prevent that a sliding member will fall easily from a U-shaped member.

  By the way, not only a fluid having a temperature at which the pipe thermally expands but also a fluid cooled to a cryogenic temperature may flow through the pipe described above. For example, when the fluid is natural gas, it can be liquefied and reduced in volume when cooled to minus 162 degrees or less. For this reason, in ships that transport natural gas, liquefied natural gas cooled from minus 167 degrees to minus 169 degrees may circulate in the piping.

  In this way, when the pipe through which the cryogenic fluid flows is fixed by the pipe fixing structure, the U-shaped member and the sliding member are thermally contracted by heat conduction through the pipe. At this time, for example, when the material of the sliding member is a material having a linear expansion coefficient higher than that of the metal, the sliding member contracts more than the U-shaped member, so that the press by caulking is released, and the U-shaped There was a risk that the sliding member would fall off the shaped member.

Japanese Utility Model Publication No. 63-47342

  In view of the above problems, an object of the present invention is to provide a piping fixing structure that can stably hold a sliding member and prevent the sliding member from falling off due to thermal contraction.

  The present invention provides a pipe fixing structure that fixes a substantially cylindrical pipe to one surface of a substantially flat support member, and the pipe fixing structure is curved along the outer peripheral surface of the pipe. And a substantially U-shaped U-shaped member formed integrally with a pair of legs extending from both ends of the curved portion, and the U-shaped member mounted on the facing surface facing the pipe. A sliding member made of a synthetic resin having a low friction coefficient, and a substantially cylindrical holding means that is screwed onto the leg portion of the U-shaped member and holds the vicinity of the end portion of the sliding member with the leg portion. And a fitting groove that is recessed in a range from one leg to the other leg on the opposite surface side of the U-shaped member, and the sliding member is fitted into the fitting groove. And is configured to protrude from the surface of the U-shaped member. A support member-side contact surface that contacts the one surface of the member; and a sliding member-side contact surface that contacts the end surface of the sliding member when screwed to the leg portion. .

The U-shaped member can be made of, for example, a metal such as SS material or SUS material, and has a U-bolt having a screw thread into which a nut is screwed in a leg portion or a screw hole into which a bolt is screwed. It can be set as a U-shaped nut member.
The sliding member may be a synthetic resin such as PTFE (tetrafluoroethylene resin).
The holding means may be a holding means constituted by a sleeve having a sliding member side contact surface and a nut having a support member side contact surface, or a holding means integrally formed by a sleeve and a nut.

According to the present invention, the sliding member can be stably held, and the sliding member can be prevented from falling off due to thermal contraction.
Specifically, since the synthetic resin sliding member is bent in a substantially U shape, the sliding member is fitted into the fitting groove portion of the U shape member. Power will be generated.

  The elastic force of the sliding member acts on the portion of the sliding member fitted to the curved portion of the U-shaped member and the portion of the sliding member fitted to the leg of the U-shaped member. can do.

  Furthermore, since the sliding member side contact surface is in contact with the end surface of the sliding member, the holding means can restrict the movement of the sliding member in the extending direction of the leg portion extended from the curved portion. Thereby, the pipe fixing structure can restrict the movement of the sliding member by the elastic force of the sliding member and the holding means, and stably maintains the fitting state in which the sliding member is fitted in the fitting groove portion of the U-shaped member. can do.

  For this reason, for example, the pipe fixing structure can eliminate the need to fix a sliding member by caulking a metal U-shaped member, and prevent corrosion of a damaged portion of the U-shaped member due to caulking. Can do.

  In addition, since the holding means is screwed to a position where it comes into contact with the sliding member, the piping fixing structure can restrict the movement of the holding means accompanying the screwing by the sliding member. For this reason, the pipe fixing structure can easily stabilize the position of the holding means with respect to the U-shaped member. That is, the pipe fixing structure can perform the holding of the sliding member and the positioning of the holding means with respect to the U-shaped member substantially simultaneously.

  Further, when the pipe is fixed to the support member, the support member-side contact surface of the holding means contacts one surface of the support member, so that the pipe fixing structure has a U-shaped member with respect to one surface of the support member. The position can be determined by the sliding member and the holding means. In other words, the sliding member and the holding means can function as positioning means for determining the position of the U-shaped member with respect to one surface of the support member.

  Thereby, when fixing piping to a supporting member, the piping fixing structure can fix piping easily by making the space | interval of piping and a sliding member into a desired space | interval. Alternatively, the pipe fixing structure can press the pipe with a desired constant load.

  Then, in a state where the pipe is fixed to the support member, the sliding member is configured such that a portion of the sliding member fitted to the curved portion of the U-shaped member is sandwiched between the curved portion of the U-shaped member and the piping. The vicinity of the end of the member is held by the holding means.

For this reason, for example, when the metal U-shaped member and the sliding member are thermally contracted, the pipe fixing structure can regulate the movement of the sliding member at least in the extending direction of the leg portion. The sliding member can be prevented from falling off from the fitting groove portion of the shaped member.
Therefore, the pipe fixing structure holds the end portion of the sliding member, and stably holds the sliding member by the one surface of the support member and the holding means that comes into contact with the sliding member. Can be prevented from falling off.

  As an aspect of the present invention, the sliding member-side contact surface of the holding means is configured by an inclined end surface that is inclined so that the inner peripheral edge is located on the support member side with respect to the outer peripheral edge. The end face of the sliding member can be constituted by an inclined end face that is inclined so as to come into contact with the sliding member side contact surface.

According to the present invention, the pipe fixing structure can more reliably prevent the sliding member from falling off due to heat shrinkage, and can prevent interference between the pipe and the holding means when the pipe is fixed to the support member.
Specifically, the sliding member side abutment surface of the holding means is configured by an inclined end surface, and the end surface of the sliding member is configured by an inclined end surface that abuts the sliding member side abutting surface. The contact surface can hold the end surface of the sliding member so as to be sandwiched between the bottom portion of the fitting groove portion.

  Thereby, the holding means can restrict the movement of the sliding member in the extending direction of the leg portion and the movement of the sliding member in the orthogonal direction orthogonal to the extending direction of the leg portion. For this reason, the pipe fixing structure can more reliably prevent the portion of the sliding member that is fitted to the leg portion of the U-shaped member from dropping from the fitting groove.

  Further, for example, when the sliding member is pressed in a state of being screwed to the U-shaped member, the movement of the sliding member in the extending direction of the leg portion is orthogonal to the extending direction of the leg portion. The movement of the sliding member in the orthogonal direction can be more reliably regulated.

  And, for example, in the substantially cylindrical holding means, the movement of the sliding member along the orthogonal direction is restricted by the inner peripheral surface of the holding means, and the movement of the sliding member along the extending direction of the leg is held by the holding means. When the inner peripheral surface of the holding member is restricted by a bottom surface formed by reducing the diameter, the outer diameter of the holding means tends to increase. For this reason, when the pipe is fixed to the support member, the pipe and the holding means may interfere with each other.

  On the other hand, by configuring the sliding member side contact surface with an inclined end surface, the pipe fixing structure easily forms the holding means with an outer diameter continuous with the outer surface of the sliding member in a cross section along the orthogonal direction. It is possible to suppress an increase in the outer diameter of the holding means. For this reason, when the pipe is fixed to the support member, the pipe fixing structure can prevent the pipe and the holding means from interfering with each other.

  Therefore, the pipe fixing structure is configured such that the sliding member side abutting surface of the holding means is composed of an inclined end surface, and the end surface of the sliding member is composed of an inclined end surface that abuts against the sliding member side abutting surface. The member can be more reliably prevented from falling off, and interference between the pipe and the holding means can be prevented when the pipe is fixed to the support member.

  As an aspect of the present invention, the holding means includes the sliding member side contact surface, a substantially cylindrical sleeve inserted into the leg portion of the U-shaped member, and the support member side contact surface. And a screwing member that is screwed onto the leg portion of the U-shaped member.

According to the present invention, the pipe fixing structure can improve the assembly workability when fixing the pipe to the support member.
Specifically, since the holding means is configured by the sleeve and the screwing member, the pipe fixing structure has a leg by a combination of the sleeve and the screwing member having different lengths along the extending direction of the leg portion. The length of the holding means along the extending direction of the part can be easily varied.

  Thereby, for example, when the sleeve and the sliding member do not come into contact with each other due to the displacement of the sliding member with respect to the U-shaped member, the pipe fixing structure can be replaced with a sleeve having a different length by simply replacing the sliding member and the sleeve. Can be contacted easily and reliably.

  Furthermore, the pipe fixing structure can be easily adjusted to a desired interval by simply replacing the interval between one surface of the support member and the sliding member facing the support member with a sleeve having a different length.

  Thereby, for example, the U-shaped member is a U bolt, and the pipe is fixed as compared with the case where the interval between one surface of the support member and the sliding member facing the U member is adjusted by the screwing position of the nut. The interval between the support member and the sliding member can be easily adjusted by simply replacing the structure with a sleeve having a different length.

For this reason, the pipe fixing structure can improve assembly workability when fixing the pipe to the support member, and can reliably prevent the U-shaped member from excessively pressing the pipe.
Accordingly, in the pipe fixing structure, the holding means is configured by the sleeve having the sliding member side abutting surface and the screwing member having the supporting member side abutting surface. The attachment workability can be improved.

As an aspect of the present invention, the U-shaped member can be formed of a metal U-bolt having a thread on the leg portion.
According to the present invention, the pipe fixing structure can prevent the sliding member from falling off due to thermal contraction without impairing the corrosion resistance, and can fix the pipe with a U-shaped member having excellent mechanical strength.

  According to the present invention, it is possible to provide a pipe fixing structure that can stably hold a sliding member and prevent the sliding member from falling off due to thermal contraction.

The external appearance perspective view which shows the external appearance from upper direction in a piping fastening structure. Sectional drawing which shows the cross section along the width direction in a piping fastening structure. The principal part expanded sectional view which shows the principal part in a fastening structure. Explanatory drawing explaining the principal part in a U volt | bolt. The partially broken perspective view which shows the external appearance of the sleeve which fractured | ruptured partially. Explanatory drawing of the principal part of the fastening structure in Example 2. FIG. The front view which shows the external appearance of the front view in another piping fastening structure.

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

  1 shows an external perspective view from above of the pipe fastening structure 1, FIG. 2 shows a cross-sectional view along the width direction Y in the pipe fastening structure 1, and FIG. 3 shows the essential parts of the fastening structure 4. FIG. 4 is an explanatory view for explaining a main part of the U-bolt 6, and FIG. 5 is a partially broken perspective view of a sleeve 631 partially broken.

4A shows a cross-sectional view taken along the line AA in FIG. 3, and FIG. 4B shows a cross-sectional view of the bolt body 61 and the sliding member 62 in a cross section along the width direction Y. Yes.
Further, in order to simplify the illustration in FIG. 1, only a part of the gantry 2 and the pipe 3 is shown, and in FIG. 2 and FIG. Omitted.

  In addition, 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.

  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 pipe 3 to the gantry 2.

  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 FIGS. 2 and 3, the frame 2 is formed with two through-holes 2 b that are open in the vertical direction at positions slightly spaced apart from the outer diameter of the pipe 3 in the width direction Y. doing.

  A plurality of through holes 2b are formed in the front-rear direction X with a predetermined interval. The through-hole 2b is formed with a diameter larger than the nominal diameter of the U bolt 6 described later.

  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, and is cooled from, for example, minus 167 degrees to minus 169 degrees. Liquefied natural gas can be distributed.

  As shown in FIGS. 2 and 3, the fastening structure 4 includes a pedestal plate 5 placed on the pedestal 2 and a pipe 3 placed on the pedestal plate 5. The bolt 6 and a fastening nut 7 for fastening the U bolt 6 to the mount 2 are configured.

As shown in FIGS. 1 and 2, the pedestal plate 5 includes a substantially flat plate main body 51 and a slide sheet 52 affixed to the approximate center in the width direction Y on the upper surface of the plate main body 51.
The plate body 51 has a predetermined thickness in the vertical direction and is a substantially rectangular flat plate shape that is long in the width direction Y in plan view, and is made of SS material or SUS material.

  As shown in FIGS. 2 and 3, the plate main body 51 is connected to two through holes 2 b of the gantry 2 and both ends of the U bolt 6 inserted at positions spaced apart in the width direction Y by a predetermined distance. Bolt insertion holes 51a are formed in the vertical direction.

  The slide sheet 52 is formed in a substantially rectangular sheet shape in plan view having a length in the width direction Y that can be applied between the bolt insertion holes 51 a in the plate body 51. This slide sheet 52 is a sheet-like member having a self-lubricating property and a smooth surface (not shown) having a low friction coefficient facing the pipe 3, and is made of, for example, a PTFE material containing a filler having a high compressive strength. ing.

  2 and 3, the U-bolt 6 is screwed to the bolt body 61, a substantially U-shaped bolt body 61 opened on the lower side, a sliding member 62 attached to the inner surface of the bolt body 61, and the bolt body 61. In addition, the bolt body 61 and the holding body 63 that holds the vicinity of the end portion of the sliding member 62 are configured.

  The bolt body 61 is formed by bending a round steel material of SS material or SUS material into a substantially U shape. More specifically, the bolt main body 61 includes a pair of bolt legs 611 extending in the vertical direction with an interval in the width direction Y slightly larger than the outer diameter of the pipe 3, and a pipe 3 between the upper ends of the pair of bolt legs 611. And a bolt bending portion 612 that is bent in a substantially semicircular shape so as to be bridged along the outer peripheral surface thereof.

  The bolt leg portion 611 is formed to have a vertical length such that the tip is exposed to the lower surface side of the gantry 2 through the through hole 2b of the gantry 2 in a state where the pipe 3 is sandwiched between the bolt legs 611. As shown in FIGS. 2 and 3, in the lower part of the bolt leg portion 611, in a state where the pipe 3 is sandwiched between the base 2 and a range from the position above the top surface 2a of the base 2 to the tip, A screw thread 611a into which the holding body 63 and the fastening nut 7 are screwed is formed.

  Further, as shown in FIGS. 2 to 4, the bolt main body 61 is provided with a fitting groove portion 613 in which the sliding member 62 is fitted on the facing surface facing the pipe 3, and the bolt bending portion from one bolt leg portion 611. A recess is provided in a range reaching the other bolt leg 611 via 612.

More specifically, the fitting groove 613 is recessed with a depth longer than the gap between the pipe 3 and the sliding member 62 in a state of being sandwiched by the gantry 2.
2 and 4A, the sliding member 62 has a length that can be fitted along the fitting groove 613 of the bolt body 61 and a thickness that can be exposed from the fitting groove 613. It is formed into a square columnar body.

  The sliding member 62 is a columnar member having a self-lubricating property and flexibility, and a smooth surface (not shown) having a low friction coefficient facing the pipe 3, and is, for example, a PTFE containing a filler having a high compressive strength. It consists of materials.

  Further, as shown in FIGS. 3 and 4B, the end surface 62 a of the sliding member 62 is formed so as to be able to come into contact with the upper end surface of the holding body 63 in the state of being fitted in the fitting groove 613. More specifically, in the cross section along the width direction Y, the end surface 62 a of the sliding member 62 is formed as an inclined end surface that is inclined downward from the inner edge in the width direction Y and toward the center of the bolt leg portion 611. Yes.

  In other words, the end surface 62a of the sliding member 62 is configured by an inclined end surface that is inclined so that the edge on the outside in the width direction Y is located on the lower side with respect to the edge on the inside in the width direction Y.

  As shown in FIGS. 1 to 3, the holding body 63 is inserted into the bolt leg portion 611 of the bolt main body 61, and is screwed into the bolt main body 61 from below the sleeve 631 that contacts the end surface of the sliding member 62 and the sleeve 631. In addition, the positioning nut 632 whose lower surface is in contact with the upper surface 51b of the plate body 51 is formed.

As shown in FIGS. 1 to 3, the sleeve 631 has a substantially cylindrical shape having an opening in the vertical direction, and is made of synthetic resin, SS material, or SUS material.
More specifically, as shown in FIG. 3, the outer diameter of the sleeve 631 is opposed to the pipe 3 in the sliding member 62 from the central axis of the bolt leg portion 611 along the vertical direction in the cross section along the width direction Y. The length in the width direction Y to the surface is a size having a radius.

On the other hand, the inner diameter of the sleeve 631 is formed to be slightly larger than the outer diameter of the bolt leg portion 611.
Furthermore, the upper end surface 631a of the sleeve 631 is formed so as to be able to contact the end surface 62a of the sliding member 62 in the vertical direction, as shown in FIGS. More specifically, the upper end surface 631a of the sleeve 631 is configured by an inclined end surface inclined in a mortar shape with the inner peripheral edge positioned below the outer peripheral edge.

  As shown in FIG. 2, the length of the sleeve 631 in the vertical direction is such that the inner bottom height H from the lower surface of the positioning nut 632 to the sliding member 62 in the bolt bending portion 612 is screwed to the positioning nut 632. It is formed with a length in the vertical direction that is a desired height. The desired height is, for example, a height obtained by adding about 1 mm to the height from the plate body 51 of the base plate 5 to the upper end of the pipe 3.

  The positioning nut 632 is a substantially hexagonal nut member in plan view whose upper surface is in contact with the lower surface of the sleeve 631 and whose lower surface is in contact with the upper surface 51b of the plate body 51. The inside of the positioning nut 632 is threaded with the thread 611a of the U-bolt 6. It is possible to form.

Next, the process of assembling the sliding member 62 and the holding body 63 to the bolt body 61 described above will be described in detail.
First, the sliding member 62 is fitted into the fitting groove portion 613 of the bolt main body 61 while being bent in a substantially U shape against its elasticity.

  At this time, in the cross section along the width direction Y, the sliding member 62 has the outer edge in the width direction Y on the end surface 62a positioned on the lower side with respect to the inner edge in the width direction Y on the end surface 62a. In this manner, the fitting groove 613 is fitted.

  Thereafter, the sleeve 631 is inserted into the bolt leg portion 611 of the bolt body 61, and the positioning nut 632 is screwed into the thread 611 a of the bolt leg portion 611. Then, the positioning nut 632 is tightened until the upper end surface 631a of the sleeve 631 contacts the end surface 62a of the sliding member 62.

  In this way, the U-bolt 6 is configured by assembling the sliding member 62 and the holding body 63 to the bolt body 61. In the U-bolt assembled in this way, the inner bottom height H from the lower surface of the positioning nut 632 to the sliding member 62 in the bolt bending portion 612 is a desired height.

Next, a process of fixing the gantry 2 pipe 3 using the fastening structure 4 having the above-described configuration will be described.
First, after placing the pedestal plate 5 on the upper surface 2a of the pedestal 2 so that the bolt insertion holes 51a of the pedestal plate 5 and the through holes 2b of the pedestal 2 communicate with each other, the pipe 3 is attached to the slide sheet 52 of the pedestal plate 5. Place.

  Thereafter, the bolt leg portion 611 of the U bolt 6 is inserted into the bolt insertion hole 51 a of the base plate 5 and the through hole 2 b of the mount 2. Then, the fastening nut 7 is screwed into the thread 611a of the U bolt 6 from below the gantry 2 and is tightened with a predetermined tightening torque to fix the pipe 3 to the gantry 2.

  At this time, for example, a gap of about 1 mm is secured between the sliding member 62 and the pipe 3 in the bolt bending portion 612 of the U bolt 6 by the U bolt 6 having the desired inner bottom height H. In the state, the pipe 3 is fixed to the gantry 2.

The U bolt 6 configured as described above can stably hold the sliding member 62 and can prevent the sliding member 62 from falling off due to thermal contraction.
More specifically, the sliding member 62 made of synthetic resin is fitted in the fitting groove 613 of the bolt main body 61 in a state where the sliding member 62 is curved in a substantially U shape, and therefore the sliding member 62 has a radial direction of the bolt bending portion 612. An elastic force to the outside is generated.

  The elastic force of the sliding member 62 is applied to the portion of the sliding member 62 fitted to the bolt bending portion 612 of the bolt main body 61 and the portion of the sliding member 62 fitted to the bolt leg portion 611 of the bolt main body 61. On the other hand, each can act.

  Furthermore, since the upper end surface 631a of the sleeve 631 is in contact with the end surface 62a of the sliding member 62, the holding body 63 can restrict the downward movement of the sliding member 62. Thereby, the U bolt 6 can restrict the movement of the sliding member 62 by the elastic force of the sliding member 62 and the holding body 63, and the fitting state in which the sliding member 62 is fitted in the fitting groove portion 613 of the bolt body 61 is stabilized. Can be maintained.

  For this reason, the U bolt 6 can eliminate, for example, the need to fix the sliding member 62 by caulking the metal bolt body 61 and prevent corrosion of the damaged portion of the bolt body 61 due to caulking. .

  In addition, since the holding body 63 is screwed to a position where it comes into contact with the sliding member 62, the U bolt 6 can restrict the movement of the holding body 63 accompanying the screwing by the sliding member 62. For this reason, the U bolt 6 can stabilize the position of the holding body 63 with respect to the bolt main body 61 easily. That is, the U bolt 6 can hold the sliding member 62 and position the holding body 63 with respect to the bolt main body 61 substantially simultaneously.

  Further, when the pipe 3 is fixed to the gantry 2, the lower surface of the positioning nut 632 of the holding body 63 comes into contact with the upper surface 51 b of the plate body 51, so that the U-bolt 6 positions the bolt body 61 relative to the upper surface 2 a of the gantry 2. It can be determined by the sliding member 62 and the holding body 63. In other words, the sliding member 62 and the holding body 63 can function as positioning means for determining the position of the bolt body 61 with respect to the upper surface 2 a of the gantry 2.

  Thereby, when fixing the piping 3 to the mount frame 2, the U bolt 6 can fix the piping 3 easily by making the space | interval of the piping 3 and the sliding member 62 into the desired space | interval. Alternatively, the U bolt 6 can press the pipe 3 with a desired constant load.

  In the state in which the pipe 3 is fixed to the gantry 2, the sliding member 62 has a portion where the sliding member 62 is fitted to the bolt bending portion 612 of the bolt main body 61 and the bolt bending portion 612 of the bolt main body 61 and the piping 3. And the vicinity of the end of the sliding member 62 is held by the holding body 63.

  For this reason, for example, when the metal bolt main body 61 and the sliding member 62 are thermally contracted, the U bolt 6 can restrict the movement of the sliding member 62 downward at least, and the fitting groove portion of the bolt main body 61 The sliding member 62 can be prevented from falling off from 613.

  Therefore, the U-bolt 6 holds the end of the sliding member 62, stably holds the sliding member 62 by the upper surface 51 b of the plate body 51, and the holding body 63 in contact with the sliding member 62, and heat shrinks. It is possible to prevent the sliding member 62 from falling off.

  Further, the upper end surface 631a of the sleeve 631 is formed of an inclined end surface, and the end surface 62a of the sliding member 62 is formed of an inclined end surface inclined so as to be able to contact the upper end surface 631a of the sleeve 631, so that the U-bolt 6 is thermally contracted. The sliding member 62 can be more reliably prevented from falling off, and when the pipe 3 is fixed to the gantry 2, interference between the pipe 3 and the holding body 63 can be prevented.

  Specifically, the upper end surface 631a of the sleeve 631 is configured as an inclined end surface, and the end surface 62a of the sliding member 62 is configured as an inclined end surface that comes into contact with the upper end surface 631a of the sleeve 631, so The end surface 631 a can hold the end surface 62 a of the sliding member 62 so as to be sandwiched between the bottom portion of the fitting groove 613.

  Thereby, the holding body 63 can regulate the downward movement of the sliding member 62 and the movement of the sliding member 62 in the width direction Y. For this reason, the U-bolt 6 can more reliably prevent the portion of the sliding member 62 fitted to the bolt leg portion 611 of the bolt main body 61 from falling off the fitting groove portion 613.

  Further, for example, when the sliding member 62 is pressed in a state of being screwed to the bolt body 61, the movement of the sliding member 62 downward and the movement of the sliding member 62 in the width direction Y are more reliably performed. Can be regulated.

  For example, in the substantially cylindrical holding body, the movement of the sliding member 62 along the width direction Y is restricted by the inner peripheral surface of the holding body, and the movement of the sliding member 62 along the lower side is restricted to the inner circumference of the holding body 63. When the bottom is formed by reducing the diameter of the surface, the outer diameter of the holding body tends to increase. For this reason, when the pipe 3 is fixed to the gantry 2, the pipe 3 and the holding body may interfere with each other.

  On the other hand, by configuring the upper end surface 631a of the sleeve 631 as an inclined end surface, the U bolt 6 can easily hold the holding body 63 with an outer diameter continuous with the outer surface of the sliding member 62 in the cross section along the width direction Y. And the increase in the outer diameter of the holder 63 can be suppressed. For this reason, when the pipe 3 is fixed to the gantry 2, the U bolt 6 can prevent the pipe 3 and the holding body 63 from interfering with each other.

  Accordingly, the U-bolt 6 is configured such that the upper end surface 631a of the sleeve 631 is an inclined end surface, and the end surface of the sliding member 62 is an inclined end surface that is in contact with the upper end surface 631a of the sleeve 631, so that the sliding member 62 is thermally contracted. The dropout can be prevented more reliably, and when the pipe 3 is fixed to the gantry 2, the interference between the pipe 3 and the holding body 63 can be prevented.

  The holding body 63 is configured by the substantially cylindrical sleeve 631 inserted into the bolt leg portion 611 of the bolt main body 61 and the positioning nut 632 that is screwed to the bolt leg portion 611 of the bolt main body 61. 6 can improve the assembly workability when the pipe 3 is fixed to the gantry 2.

  Specifically, since the holding body 63 is configured by the sleeve 631 and the positioning nut 632, the U-bolt 6 extends along the vertical direction by the combination of the sleeve 631 and the positioning nut 632 having different vertical lengths. The length of the holding body 63 can be easily varied.

  Thereby, for example, when the sleeve 631 and the sliding member 62 do not come into contact with each other due to the displacement of the sliding member 62 with respect to the bolt main body 61, the U-bolt 6 is simply replaced with the sleeve 631 having a different length. And the sleeve 631 can be contacted easily and reliably.

  Furthermore, the U bolt 6 can be easily adjusted to a desired interval by simply replacing the interval between the upper surface 2a of the gantry 2 and the sliding member 62 opposed thereto with a sleeve 631 having a different length.

  Thereby, compared with the case where the space | interval of the upper surface 2a of the mount frame 2 and the sliding member 62 facing this is adjusted with the screwing position of a nut, the U volt | bolt 6 is only replaced | exchanged for the sleeve 631 from which length differs. Thus, the distance between the gantry 2 and the sliding member 62 can be easily adjusted.

For this reason, the U bolt 6 can improve the assembly workability when fixing the pipe 3 to the gantry 2 and can reliably prevent the bolt body 61 from pressing the pipe 3 excessively.
Therefore, the U-bolt 6 can improve the assembling workability when the pipe 3 is fixed to the gantry 2 by forming the holding body 63 with the sleeve 631 and the positioning nut 632.

  Further, since the metal bolt body 61, the sliding member 62, and the holding body 63 are used, the U bolt 6 can prevent the sliding member 62 from falling off due to thermal shrinkage without impairing the corrosion resistance. At the same time, the pipe 3 can be fixed by the bolt body 61 having excellent mechanical strength.

An embodiment in which the sliding member and the holding body are different from those in Example 1 will be described in detail with reference to FIG.
6 shows an explanatory view of the main part of the fastening structure 4 in the second embodiment, FIG. 6 (a) shows an enlarged sectional view of the main part of the main part of the fastening structure 4 in the second embodiment, and FIG. b) is a partially broken perspective view of the holding body 65 partially broken.
The same configurations as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The shape of the end surface of the sliding member 64 is different from that of the sliding member 62 of the first embodiment. More specifically, as shown in FIG. 6A, the end surface 64 a of the sliding member 64 has a vertical position of the edge inside the width direction Y and a width direction Y in the cross section along the width direction Y. It forms in the substantially plane along the width direction Y where the position of the edge of an outer edge on the outer side is substantially the same position.

  Further, the holding body 65 is different from the holding body 63 of the first embodiment in that a portion that holds the sliding member 64 and a portion that is screwed to the U bolt 6 are integrally formed. Furthermore, the holding body 65 is different from the holding body 63 of the first embodiment in the holding structure for holding the sliding member 64.

  More specifically, as shown in FIGS. 6A and 6B, the holding body 65 has a substantially cylindrical shape that is open in the vertical direction, and holds the vicinity of the end of the sliding member 64. And the screwing part 652 screwed to the thread 611a of the U volt | bolt 6 is integrally formed in this order from upper direction.

  The holding part 651 integrally forms the vicinity of the end of the sliding member 64, the upper part integrally surrounding the bolt body 61, and the lower part surrounding the screw thread 611a of the bolt body 61 in this order from above. Yes. Note that the outer peripheral surface of the holding portion 651 is formed with an outer diameter large enough to integrally surround the end portions of the bolt body 61 and the sliding member 64.

  In the cross section along the width direction Y, the inner peripheral surface of the upper portion of the holding portion 651 has a radius in the length in the width direction Y from the central axis of the bolt leg portion 611 to the surface facing the pipe 3 in the sliding member 64. It is formed in size.

In addition, in the upper part of the holding part 651, the surface which faces the pipe 3 in the sliding member 64 and the peripheral surface which contacts in the width direction Y are side contact surfaces 651a, and the surface which contacts the end surface of the sliding member 64 in the vertical direction. Is a lower contact surface 651b.
The inner peripheral surface of the lower portion of the holding portion 651 is formed with an inner diameter that is substantially the same as the diameter of the bolt leg portion 611.

  In other words, the holding portion 651 has a portion facing the sliding member 64 in the cylindrical body formed with an inner diameter through which the bolt leg portion 611 of the U bolt 6 can be inserted, from the central axis of the bolt leg portion 611 to the outer surface of the sliding member 64. It is formed in a shape expanded with a radius substantially equal to the length of.

  The screwing portion 652 has a nut shape larger in diameter than the holding portion 651, communicates with the inside of the holding portion 651, and has a screw hole 652a that can be screwed into the thread 611a of the U bolt 6 inside. Is formed. The lower surface of the screwing portion 652 is in contact with the upper surface 51b of the plate body 51.

  The length in the vertical direction from the lower surface of the screwing portion 652 to the lower contact surface 651b is desired to be the inner bottom height H from the lower surface of the screwing portion 652 to the sliding member 64 in the bolt bending portion 612. It is formed with a length in the vertical direction that is the height.

  The U-bolt 6 configured as described above can stably hold the sliding member 64 and prevent the sliding member 64 from falling off due to thermal contraction, as in the first embodiment.

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 and the pedestal plate 5 of the embodiment,
Similarly,
One surface of the support member corresponds to the upper surface 51b of the plate body 51,
The pipe fixing structure corresponds to the U bolt 6,
The curved portion corresponds to the bolt curved portion 612,
The pair of legs corresponds to the pair of bolt legs 611,
The U-shaped member corresponds to the bolt body 61,
The holding means corresponds to the holding body 63 and the holding body 65,
The support member side contact surface corresponds to the lower surface of the positioning nut 632 and the lower surface of the threaded portion 652 of the holding body 65,
The sliding member side contact surface corresponds to the upper end surface 631a of the sleeve 631 and the lower contact surface 651b of the holding body 65,
The screw member corresponds to the positioning nut 632,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the first and second embodiments described above, the sliding members 62 and 64 are formed of a PTFE material. However, the present invention is not limited to this, and a smooth surface having a self-lubricating property and flexibility and having a low friction coefficient. As long as the material can constitute the sliding member, the sliding member may be formed of an appropriate synthetic resin.

Although the plate body 51 has a substantially rectangular shape in plan view, the plate body 51 is not limited thereto, and may be a plate body having a substantially elliptical shape in plan view or a substantially circular shape in plan view. Alternatively, the plate body 51 may be unnecessary.
Although the slide sheet 52 has a substantially rectangular shape in plan view, the present invention is not limited thereto, and may be a slide sheet having a substantially oval shape in plan view or a substantially circular shape in plan view.

  Further, the U-bolt 6 is configured such that the sliding member 62 is fitted to the fitting groove portion 613 of the bolt main body 61. However, the present invention is not limited to this, and the bolt main body in a state where the sliding member 62 is fitted to the fitting groove portion 613. The sliding member 62 may be held by crimping 61. As a result, the U bolt 6 can more reliably prevent the sliding member 62 from dropping from the fitting groove 613.

  Further, a square washer or a plain washer may be disposed between the pedestal plate 5 and the holding body 63, and a plain washer or a spring washer may be disposed between the gantry 2 and the fastening nut 7. Alternatively, in place of the washer, an insulating washer having an insulating property is used, and an insulating sleeve having an insulating property is inserted into the through hole 2b of the pedestal 2 and the bolt insertion hole 51a of the pedestal plate 5 to improve the insulating property. Also good.

  Further, as shown in FIG. 7 showing a front view of another pipe fastening structure 100, a U-shape having a screw hole 911a into which the fastening bolt 8 is screwed in place of the U bolt 6 of the fastening structure 4 in the above-described embodiment. The shape member 9 may be used.

  More specifically, as shown in FIG. 7, the U-shaped member 9 includes a substantially U-shaped member main body 91 opened on the lower side, a sliding member 62 mounted on the inner surface of the member main body 91, and a screw on the member main body 91. The holder body 63 and the holding body 63 that holds the vicinity of the end portion of the sliding member 62 together with the member main body 91 are configured.

  The member main body 91 has two leg portions 911 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 upper end of the two leg portions 911 along the outer peripheral surface of the pipe 3. It is formed in a substantially U shape with a curved portion 912 that is curved in a substantially semicircular shape so as to bridge.

  As shown in FIG. 7, the leg portion 911 of the member main body 91 is formed with a screw thread (not shown) on which the positioning nut 632 of the holding body 63 is screwed on the outer peripheral surface thereof, and the fastening bolt 8 from below. Screw holes 911a that allow screwing are formed along the axial direction.

  In addition, the member main body 91 has a fitting groove portion 913 in which the sliding member 62 is fitted on the opposite surface side facing the pipe 3, from the one leg portion 911 to the other leg portion 911 through the curved portion 912. Is recessed.

  The sliding member 62 is fitted to such a member main body 91, and the sliding member 62 is held by a holding body 63 screwed to the member main body 91 to constitute the U-shaped member 9.

  Then, the square washer 10 and the U-shaped member 9 are placed on the pedestal plate 5 on which the pipe 3 is disposed, and the fastening bolts 8 are placed from below the gantry 2 via the plain washers 11 and the spring washers 12. Is screwed into the screw hole 911 a of the U-shaped member 9 to fix the pipe 3.

  Even the U-shaped member 9 as described above can stably hold the sliding member 62 and prevent the sliding member 62 from falling off due to thermal contraction, as in the above-described embodiment.

2 ... frame 3 ... pipe 5 ... pedestal plate 6 ... U bolt 9 ... U-shaped member 51 ... plate body 51b ... upper surface 61 ... bolt body 62 ... sliding member 62a ... end face 63 ... holding body 64 ... sliding member 64a ... end face 65 ... Holding body 91 ... Member main body 611 ... Bolt leg part 611a ... Screw thread 612 ... Bolt bending part 613 ... Fitting groove part 631 ... Sleeve 631a ... Upper end surface 632 ... Positioning nut 651b ... Lower contact surface 911 ... Leg part 912 ... Curved Part 913 .. fitting groove

Claims (4)

A pipe fixing structure for fixing a substantially cylindrical pipe to one surface of the substantially flat support member,
The pipe fixing structure is
A substantially U-shaped U-shaped member integrally formed with a curved portion curved along the outer peripheral surface of the pipe, and a pair of legs extending from both ends of the curved portion;
A sliding member made of a synthetic resin having a low coefficient of friction, which is mounted on the opposite surface of the U-shaped member facing the pipe;
The U-shaped member is screwed to the leg portion, and is configured with a substantially cylindrical holding means that holds the vicinity of the end portion of the sliding member with the leg portion,
On the opposite surface side of the U-shaped member,
A fitting groove part provided in a range extending from one leg part to the other leg part,
The sliding member;
While fitting into the fitting groove portion, it is configured to protrude from the surface of the U-shaped member,
In the holding means,
A support member-side contact surface that contacts the one surface of the support member;
A pipe fastening structure including a sliding member side contact surface that contacts an end surface of the sliding member in a state of being screwed to the leg portion. The sliding member side contact surface of the holding means,
Consists of an inclined end surface that is inclined so that the edge on the inner peripheral side is located on the support member side with respect to the edge on the outer peripheral side,
An end face of the sliding member,
The pipe fastening structure according to claim 1, wherein the pipe fastening structure is configured by an inclined end face that is inclined so as to be able to contact the sliding member side contact surface. The holding means;
A substantially cylindrical sleeve that has the sliding member side contact surface and is inserted into the leg portion of the U-shaped member;
3. The pipe fastening structure according to claim 1, wherein the pipe fastening structure includes a support member side contact surface and a screwing member screwed onto the leg portion of the U-shaped member. The U-shaped member;
The pipe fastening structure according to any one of claims 1 to 3, wherein the pipe fastening structure is formed of a metal U-bolt having a thread on the leg portion.

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