JP7254015B2 - Piping fixtures and mounting plates used therefor - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fixture used when fixing various pipes to a bracket, a frame or a steady rest, and a mounting plate used therefor.

Various types of pipes are used in the construction of air conditioning equipment and sanitary equipment according to their uses and purposes, and can be broadly classified into metal pipes and resin pipes according to their materials.

For example, for water supply pipes, lining steel pipes whose inner surfaces are coated with polyethylene or hard polyvinyl chloride, and resin pipes such as hard polyvinyl chloride pipes and polyethylene pipes are used. A rigid polyvinyl chloride lined steel pipe is used.

When installing these pipes inside a building, horizontal pipes can be hung from the ceiling or upper floor slabs with hanging bands, or mounted on brackets attached to the walls or gate-type frames installed on the floor. After placing it, fix it to these brackets and frames with U bolts, and if it is a riser pipe, fix it to the wall with a vertical band, and also fix it to a steady rest attached to the wall with U bolts.

Here, in order to fix the piping using U bolts, the U bolts are placed on the piping so as to straddle the piping, and the male threads formed at each end of the U bolts are attached to brackets, portals, or steady bars. , and then a nut is screwed onto the male screw.

Showa Corporation, [online], [searched on December 13, 2019], Internet <URL: https://www.showa-cp.jp/products-own/boushin/>

Various mechanical vibrations are transmitted to the piping from the drive source, and the pressure pulsation of the liquid pumped from the pump acts on the piping. As a result, the pipes and the pipe fixtures fixing them may be damaged.

To avoid such a situation, it is effective to take fundamental countermeasures such as designing the piping route so that the frequency of pressure pulsation and the natural frequency of the piping system do not match. There are restrictions on changing , etc., and in practice, it is often unavoidable to cause vibrations in the piping.

Therefore, in places where vibrations are expected, pipes are fixed using a pipe fixing device in which anti-vibration rubber is attached to the inner peripheral side of the U-band (Non-Patent Document 1).

However, in the conventional piping fixture, the rubber vibration isolator is detachable from the U-band, and the vibration-isolation rubber is not firmly fixed to the U-band. Friction or shear deviation occurs between the anti-vibration rubber and the U-band, or an unexpected impact load acts on the anti-vibration rubber, causing stress concentration on the anti-vibration rubber, and the anti-vibration function may eventually become impossible. There was a problem that there was

In addition, when analyzing the natural frequency of the piping system in advance, there are variations in the degree of fixing of the anti-vibration rubber to the U band, so it is difficult to determine the fixing conditions, and there is a problem that sufficient reliability cannot be given to the analysis results. was also occurring.

The present invention has been made in consideration of the above-mentioned circumstances, and is capable of maintaining the anti-vibration function for a long period of time, and suppressing variations in the degree of fixation to a fixing member such as a U-band. It is an object of the present invention to provide a piping fixture and a mounting plate used therefor, which can improve the durability.

In order to achieve the above object, the pipe fixture according to the present invention has a U-shape as a whole and is arranged such that pipes are inserted into the inner space and near each end. A metal fixing member provided with a male screw, a covering portion that covers the entire peripheral surface of the fixing member along the circumferential direction, and a load transmission that is arranged adjacent to the piping arrangement side of the covering portion. The load transmission part is formed by a main body wall that is continuously integrated with the covering part and has a semi-cylindrical shape centered on the material axis of the pipe, and a shape that extends from the main body wall toward the material axis. A plurality of protrusions are arranged discretely in the circumferential direction and formed such that each tip surface is in contact with the peripheral surface of the pipe. provided in the form of being buried in
The fixing member is a U-bolt,
The covering portion and the load transmitting portion are mounted in a state in which the male screw is inserted into an attachment side member such as a bracket, a portal frame, and a steady rest, and a tightening torque is introduced by a nut screwed to the male screw. Tightening by the nut is restricted by configuring so that the male thread side end of the covering portion and the male thread side end of the main body wall abut against the mounting side member or a pedestal disposed thereon. It is designed to

Further, in the pipe fixture according to the present invention, at least the projections of the load transmission portion are made of a thermoplastic elastomer having a vibration absorbing function.

Further, in the pipe fixture according to the present invention, the width of the load transmission portion is set to be larger than the overall width of the fixing member and the covering portion, with the width being the dimension along the material axis direction of the pipe. be.

In addition, as described in claim 4 , the mounting plate according to the present invention is a mounting plate used together with the piping fixture according to any one of claims 1 to 3 ,
a plate body having spaced bolt holes through which the male screws are inserted; and a pedestal projecting from a portion of the plate body located between the bolt holes on the side where the piping is arranged. The pedestals are arranged discretely in a manner extending from the pedestal body and the pedestal body toward the material axis, and each tip surface is formed so as to contact the peripheral surface of the pipe. It is composed of a plurality of protrusions.

Further, in the mounting plate according to the present invention, at least the protrusions of the base are made of a thermoplastic elastomer having a vibration absorbing function.

In the pipe fixing device according to the present invention, the load transmitting portion is arranged adjacent to the covering portion on the piping arrangement side of the covering portion covering the peripheral surface of the fixing member, and the load transmitting portion is continuously integrated with the covering portion. A main body wall formed into a semi-cylindrical shape centered on the material axis of the pipe and arranged discretely in the circumferential direction in a manner extending from the main body wall toward the material axis of the pipe, and each tip surface is in contact with the peripheral surface of the pipe. and a plurality of protrusions formed to be in contact with each other, and the covering portion is provided in such a manner that the fixing member is embedded in the covering portion by insert molding.

In this way, the bonding strength between the coating and the fixing member is increased, and play and backlash between the two are eliminated. There is no risk of misalignment, and there is no risk of an unexpected impact load acting on the load transmitting portion or covering portion.

Therefore, there is no risk of damage caused by friction, shear displacement, or impact load occurring in the load transmitting portion or covering portion. maintained over time.

Note that the vibration isolation function of the load transmission part here is a vibration isolation function by adjusting the rigidity of the protrusion so that the pipe fixture and pressure pulsation do not resonate, and the vibration isolation function by vibration absorption, which will be described later. different.

In addition, with the conventional piping fixture that attaches the rubber isolators to the U-band, the rubber isolators that are formed in a straight shape are bent and then set to the U-band in that state. It is necessary to mold with a softness suitable for such mounting work, and there are large restrictions on adjusting the rigidity. Since there is no need to consider the The stiffness of the section can be set to the desired magnitude.

In addition, since the covering portion is provided so that the fixing member is embedded by insert molding, the degree of fixation of the covering portion to the fixing member is less likely to vary.

Therefore, the vibration characteristics of the pipe fixture according to the present invention can be clearly defined by vibration experiments, etc., and if this is reflected in the natural frequency analysis of the piping system, more accurate analysis results can be obtained. becomes.

A typical example of the fixing member is a U-bolt or a U-band.

The cover part and the load transmission part shall be made of a material having rigidity and strength that enables load transmission between the fixed member and the pipe. However, if at least the protrusions of the load transmitting portion are made of a thermoplastic elastomer having a vibration absorbing function, it is possible to enhance the vibration absorbing function of the load transmitting portion.

By the way, in the case of standard or general-purpose thermoplastic elastomers, there are cases where the vibration absorption function is not sufficient, but the function as an elastic spring can be fully exhibited, and its vibration characteristics can be confirmed by vibration experiments. Therefore, even if the vibration absorption function is not sufficient, if the rigidity of the thermoplastic elastomer is appropriately set, the natural frequency of the entire piping system, including the piping fixture, can be obtained. can be changed so that it does not match the frequency of the pressure pulsation. When formed from an elastomer, it is possible to improve the vibration absorption function in addition to the vibration isolation function by adjusting the rigidity.

The main body wall of the load transmission part is configured to have a semi-cylindrical shape centered on the material axis of the pipe. It is not necessary that the central angle when viewed from the plane is approximately 180°, but may be less than 180°, for example, 120°.

The load transmission part can have a dimension along the material axis direction of the pipe (hereinafter referred to as width) equal to the overall width of the fixing member and the covering part, but if it is set larger than the overall width , the number of protrusions and, in turn, the total area of their tip surfaces can be increased, so that the vibration load from the pipe is transmitted to the load transmission part in a dispersed state, thus stress concentration occurs in the pipe and the load transmission part. situation can be prevented.

The mounting plate used together with the pipe fixing device according to the present invention described above is used in a form sandwiched between the pipe and the mounting side member such as a bracket, a portal frame, or a steady rest. Between the two bolt holes through which the male screws of the fixing member constituting the and a plurality of protrusions which are arranged discretely in a manner extending toward each other and are formed so that the tip surfaces of the respective protrusions are in contact with the peripheral surface of the pipe.

In this way, unlike the conventional method in which straight-formed anti-vibration rubber is bent and used, the type of material forming the pedestal, the cross-sectional area of the projection, the length of the projection, and other specifications can be changed in any way. It can be determined freely without any restrictions, and the rigidity of the pedestal can be set to a desired magnitude.

The pedestal shall be made of a material with rigidity and strength that enables load transmission between the piping and the mounting side members such as brackets, portals, and anti-vibration. Although it can be formed by molding, if at least the protrusions of the base are made of a thermoplastic elastomer having a vibration absorbing function, the vibration absorbing function of the base can be enhanced.

The whole pipe fixture 1 perspective view which concerns on this embodiment. It is also a view of the pipe fixture 1 according to this embodiment, (a) is a front view, (b) is an arrow view (side view) seen from the direction of AA, and (c) is a BB line. A cross-sectional view along the . It is also a view of the pipe fixture 1 according to the present embodiment, (a) is an arrow view (plan view) seen from the CC line direction, and (b) is an arrow view seen from the DD line direction. (bottom view). FIG. 2 is an assembly perspective view showing how the pipe 2 is fixed to the bracket 51 using the pipe fixture 1 and the mounting plate 61. FIG. It is the figure which showed a mode that the piping 2 was fixed to the bracket 51 similarly using the piping fixture 1 and the attachment plate 61, (a) is a front view before assembly, (b) is a front view after assembly. The assembly perspective view of the piping fixture which concerns on a modification. It is a front view of the same, where (a) is a front view before assembly and (b) is a front view after assembly. The perspective view of the piping fixture which concerns on another modification. It is a pipe fixture according to another modification, (a) is a front view, (b) is an arrow view (side view) seen from the EE line direction, (c) is along the FF line direction Cross section.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a pipe fixture according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall perspective view showing a pipe fixture according to this embodiment, FIG. 2 is a front view, side view and sectional view, and FIG. 3 is a plan view and a bottom view.

As shown in these figures, the pipe fixture 1 according to the present embodiment has a U-shape as a whole, and a pipe 2 is inserted into an inner space, and male screws 3 and 3 are provided in the vicinity of each end. 3 as a metal fixing member, a covering portion 5 covering the peripheral surface of the U bolt, and a load transmitting portion 6 arranged adjacent to the piping arrangement side of the covering portion. I have

The covering portion 5 is provided so that the U-bolt 4 is embedded by insert molding over the entire circumference of the U-bolt 4 in the circumferential direction and over the portion excluding the male threads 3, 3 in the axial direction.

The load transmitting portion 6 has a body wall 6a which is continuously integrated with the covering portion 5 and has a semi-cylindrical shape centered on the material axis of the pipe 2, and a body wall 6a extending from the body wall toward the material axis of the pipe 2 in the circumferential direction. The ridges 6b are formed as a plurality of projections discretely arranged in the pipe 2, and the ridges 6b are formed so that their tip surfaces 11 are in contact with the peripheral surface of the pipe 2, respectively.

When the width of the load transmission portion 6 is taken along the material axis direction of the pipe 2, the width _W2 of the load transmission portion 6 is defined by the U bolt 4 and the coating coated on its peripheral surface, as can be clearly seen in FIG. 2(c). It is formed so as to be larger than the overall width _W1 of the portion 5 .

The covering portion 5 and the load transmitting portion 6 are formed by injection molding using a thermoplastic elastomer as an injection material so as to have rigidity and strength that enable load transmission between the U-bolt 4 and the pipe 2. However, the ridges 6b of the load transmitting portion 6 in particular are made of a thermoplastic elastomer having a vibration absorbing function.

Thermoplastic elastomers with vibration-absorbing functions are commercially available, for example, from Sekisui Polymatech Co., Ltd. under the trade name of "EXAGEL" (registered trademark), and from Kuraray Co., Ltd. under the trade name of "Hibler" (registered trademark). A commercially available one can be selected.

In the pipe fixture 1 according to the present embodiment, the load transmission portion 6 is arranged adjacent to the pipe arrangement side in a form of being continuously integrated with the covering portion 5 covering the peripheral surface of the U bolt 4. A plurality of ridges 6b are arranged discretely in the circumferential direction so as to extend from the main body wall 6a toward the material axis of the pipe 2, and each of the ridges has a tip end surface 11 extending along the circumference of the pipe 2. They are formed so as to be brought into contact with the respective surfaces.

In this way, each ridge 6b is deformed in the expansion/contraction direction or the shearing direction so as to follow the vibration load transmitted from the pipe 2. In this case, the specifications of the thermoplastic elastomer that is the material for forming the ridges 6b so as not to resonate with the pressure pulsation, and the three-dimensional shape of the ridges 6b (the dimension along the circumferential direction of the pipe 2, the material axial direction of the pipe 2 By appropriately selecting the dimensions, height, etc.) of the protrusion, the compression stiffness and shear stiffness of the protrusion can be adjusted, and the vibration load transmitted from the pipe 2 to the pipe fixture 1 can be reduced.

4 and 5 are diagrams showing how the piping fixture 1 is used to fix the piping 2 to the bracket 51, which is the attachment side member. As shown in these figures, a mounting plate 61 is used for fixing to the bracket 51 .

The mounting plate 61 includes a plate body 63 in which bolt holes 62, 62 through which the male screws 3, 3 are respectively inserted are formed, and a portion of the plate body located between the bolt holes 62, 62 and connected to the piping. 2 and a pedestal 64 projecting from the side on which 2 is arranged.

The pedestal 64 includes a pedestal body 64 a fixed to the plate body 63 and a plurality of projections 64 b as discrete protrusions extending from the pedestal body toward the material axis of the pipe 2 along the circumferential direction of the pipe 2 . , and the ridges are formed so that their tip end surfaces 65 are in contact with the peripheral surface of the pipe 2 .

The pedestal 64 is formed by injection molding using a thermoplastic elastomer as an injection material so as to have rigidity and strength capable of transmitting a load between the bracket 51 and the pipe 2, mainly a vertical load acting on the pipe. In particular, the ridges 64b are made of a thermoplastic elastomer having a vibration absorbing function.

Since the thermoplastic elastomer having a vibration absorbing function is the same as that described for the pipe fixture 1, the description thereof will be omitted here.

In order to fix the piping 2 to the bracket 51 using the mounting plate 61 according to this embodiment, The mounting plate 61 is placed on the bracket 51, then the pipe 2 is placed on the pedestal 64 of the mounting plate 61, and then the pipe fixture 1 is arranged so as to straddle the pipe 2, and its male screws 3, 3 are attached. are inserted into the bolt holes 62, 62 of the plate body 63 and the bolt holes 52, 52 of the bracket 51, and the nuts 53, 53 are screwed to the ends thereof and tightened.

In addition, on the base 64 of the mounting plate 61, a plurality of ridges 64b are arranged discretely in the circumferential direction so as to extend from the pedestal main body 64a toward the material axis of the pipe 2. Since the surfaces 65 are formed so as to be in contact with the peripheral surface of the pipe 2 , as with the load transmitting portion 6 of the pipe fixture 1 , the protrusions are formed so as not to resonate with the pressure pulsation of the fluid flowing through the pipe 2 . The specifications of the thermoplastic elastomer that is the forming material of 64b and the three-dimensional shape of the protrusion 64b (dimension along the circumferential direction of the pipe 2, dimension along the axial direction of the pipe 2, height, etc.) can be appropriately selected. , the compression stiffness and shear stiffness of the ridges can be adjusted to reduce the vibration load transmitted from the pipe 2 to the mounting plate 61 .

As described above, according to the piping fixture 1 according to the present embodiment, the U-bolt 4 is embedded in the covering portion 5 by insert molding to provide the covering portion, and the main body wall 6a is formed on the covering portion 5. Since the load transmission part 6 is arranged adjacent to the piping arrangement side of the covering part in a continuous and integrated manner, in the conventional pipe fixing device, the straightly formed anti-vibration rubber is bent and bent inside the U band. Since it must be attached to the peripheral side, the anti-vibration rubber had to be formed softly so as to match the work. Specifications such as the cross-sectional area of the ridges 6b or their projecting lengths can be freely determined without any restrictions.

Therefore, it is possible to appropriately adjust the rigidity of the ridge 6b so that the pressure pulsation of the fluid flowing in the pipe 2 and the pipe fixture 1 do not resonate, thus enhancing the anti-vibration function.

Further, according to the pipe fixture 1 according to the present embodiment, the U bolt 4 is embedded in the covering portion 5 by insert molding, so that the covering portion is provided. Since the bonding strength is increased, there is no play or backlash between the two, and when a vibration load from the pipe 2 acts, there is no risk of friction or shear deviation occurring between the coating 5 and the U-bolt 4, and the load is transmitted. There is no possibility that an unexpected impact load acts on the portion 6 or the covering portion 5.例文帳に追加

Therefore, there is no possibility that the load transmitting portion 6 or the covering portion 5 will be damaged due to friction, shear displacement, or impact load, and thus the anti-vibration function of the load transmitting portion 6 can be maintained for a long period of time.

Further, according to the piping fixture 1 according to the present embodiment, the U bolt 4 is embedded in the covering portion 5 by insert molding, so that the covering portion is provided. In this way, the vibration characteristics of the piping fixture 1 can be clearly determined by vibration experiments, etc., and by reflecting this in the analysis of the natural frequency of the piping system, more accurate analysis results can be obtained. can be obtained.

In addition, according to the piping fixture 1 according to the present embodiment, the width of the load transmission portion 6 is set larger than the overall width of the U bolt 4 and the covering portion 5, so the number of protrusions 6b, which are protrusions, Since the total area of the tip end surfaces 11 can be increased, the vibration load from the pipe 2 is transmitted to the load transmission portion 6 in a dispersed state, thus stress concentration occurs in the pipe 2 and the load transmission portion 6. can be prevented.

In this embodiment, the covering portion 5, the load transmission portion 6, and the base 64 are made of thermoplastic elastomer, and in particular, the ridges 6b of the load transmission portion 6 and the ridges 64b of the base 64 are made of a thermoplastic elastomer having a vibration absorbing function. Although formed, the ridges 6b and ridges 64b may alternatively be formed of a standard or general purpose thermoplastic elastomer, like the other parts.

In such a configuration, the vibration absorbing function of the load transmitting portion 6 and the pedestal 64 is lowered, but by adjusting the rigidity of the ridges 6b and 64b, it is possible to avoid resonance with pressure pulsation. There is no difference in that the anti-vibration function at the point is exhibited.

Further, in this embodiment, the pipe 2 is received via the mounting plate 61, but instead of this, the pipe 2 is received via a known mounting plate formed by protruding a pedestal made of anti-vibration rubber. You may receive

Although not specifically mentioned in this embodiment, as shown in FIGS. 6 and 7, the male screws 3, 3 are inserted into the bolt holes 52, 52 of the bracket 51, and a nut 53 is screwed onto the male screws. , 53, the male screw side end portion 111 of the cover portion 5 and the male screw side end portion 112 of the main body wall 6a constituting the load transmitting portion 6 are placed on the bracket 51. The covering portion 5 and the load transmitting portion 6 may be configured so as to contact the plate body 63 of the mounting plate 61 .

According to this configuration, when the nuts 53, 53 screwed onto the male screws 3, 3 of the U-bolt 4 are tightened, after a predetermined torque is introduced, the male screw side end of the covering portion 5 is tightened. Since the externally threaded side end portion 112 of the body wall 6a constituting the portion 111 and the load transmitting portion 6 abuts against the mounting plate 61 and further tightening becomes impossible, the tightening force acting on the pipe 2 becomes excessive. can be prevented from occurring.

In addition, in the present embodiment, the width _W2 of the load transmission portion is set to the U-bolt 4 and its circumference so that stress concentration is less likely to occur in the pipe and the load transmission portion in the load transmission between the pipe and the fixed member. Although the load transmitting portion 6 is formed so as to be larger than the entire width W1 of the covering portion ₅ covering the surface, if there is no concern about stress concentration, as shown in FIG. The load transmitting portion of the present invention may be a load transmitting portion 6'' formed so that the width _W2 is equal to the overall width W1 of the U-bolt 4 and the covering portion ₅ covering the peripheral surface thereof. .

The load transmission portion 6″ has the same configuration as the load transmission portion 6 except that the width _W2 is smaller than the width _W2 of the load transmission portion 6, so detailed description thereof will be omitted here.

Also, in the present embodiment, the metal fixing member according to the present invention is configured by the U-bolt 4, but instead of this, it may be configured by a U-band 141 as shown in FIG.

A pipe fixing member 140 according to the modification shown in the same figure has a male screw member attached to each end of a band main body 142 which has a U-shape as a whole and is arranged such that the pipe 2 is inserted and arranged in an inner space by welding or the like. It comprises a U-band 141 formed by connecting 143, 143, a covering portion 144 covering the peripheral surface of a band body 142, and a load transmitting portion 145 arranged adjacent to the piping arrangement side of the covering portion.

The covering portion 144 is provided in such a manner that the U band 141 is embedded by insert molding.

The load transmitting portion 145 includes a main body wall 6a which is continuously integrated with the covering portion 5 and has a semi-cylindrical shape centered on the material axis of the pipe 2, and a shape extending from the main body wall toward the material axis of the pipe 2 in the circumferential direction. The ridges 6b are formed as a plurality of projections discretely arranged in the pipe 2, and the ridges 6b are formed so that their tip surfaces 11 are in contact with the peripheral surface of the pipe 2, respectively.

As can be clearly seen in FIG. 9(c), the load transmission portion 145 has a width _W2 defined by the band main body 142 and the coating coated on the peripheral surface thereof, when the width is the dimension along the material axis direction of the pipe 2. It is formed so as to be larger than the overall width _W1 of the portion 5 .

The covering portion 144 and the load transmitting portion 145 are formed by injection molding using a thermoplastic elastomer as an injection material so as to have rigidity and strength capable of transmitting the load between the U-band 141 and the pipe 2. In particular, the ridges 6b of the load transmitting portion 145 are made of a thermoplastic elastomer having a vibration absorbing function.

Other configurations and effects of the piping fixture 140 are substantially the same as those of the above-described embodiment, and therefore descriptions thereof are omitted here.

It should be noted that the mounting plate 61 can also be used for the piping fixture 140 , and all of the modifications of the above-described embodiments can also be applied to the piping fixture 140 .

1 pipe fixture 2 pipe 3, 3 male screw 4 U bolt (fixing member)
5 covering portion 6 load transmission portion 6a main body wall 6b ridge (protrusion)
11 Tip surface 61 Mounting plates 62, 62 Bolt hole 63 Plate main body 64 Pedestal 64a Pedestal main body 64b Projection (protrusion)
65 tip surface 141 U band (fixing member)
144 covering portion 145 load transmission portion

Claims (5)

A metal fixing member which has a U-shape as a whole and is arranged such that a pipe is inserted into the inner space and is provided with a male screw near each end, and a peripheral surface of the fixing member. It is composed of a covering portion that covers the entire circumference along the direction, and a load transmission portion that is arranged adjacent to the piping arrangement side of the covering portion, and the load transmission portion is continuously integrated with the covering portion. A main body wall having a semicylindrical shape centered on an axis and a body wall extending from the main body wall toward the material axis are arranged discretely in the circumferential direction, and each tip surface is formed so that it abuts on the peripheral surface of the pipe. and a plurality of protrusions formed by forming the fixing member, and the covering portion is provided in such a manner that the fixing member is embedded in the covering portion by insert molding,
The fixing member is a U-bolt,
The covering portion and the load transmitting portion are mounted in a state in which the male screw is inserted into an attachment side member such as a bracket, a portal frame, and a steady rest, and a tightening torque is introduced by a nut screwed to the male screw. Tightening by the nut is restricted by configuring so that the male thread side end of the covering portion and the male thread side end of the main body wall abut against the mounting side member or a pedestal disposed thereon. A piping fixture characterized by : 2. The pipe fixture according to claim 1, wherein at least the protrusion of the load transmitting portion is made of a thermoplastic elastomer having a vibration absorbing function. 3. The pipe fixing device according to claim 1, wherein the width of the load transmission portion is set larger than the overall width of the fixing member and the coating portion, with the width being the dimension along the material axis of the pipe. A mounting plate used in combination with the piping fixture according to any one of claims 1 to 3 ,
a plate body having spaced bolt holes through which the male screws are inserted; and a pedestal projecting from a portion of the plate body located between the bolt holes on the side where the piping is arranged. The pedestals are arranged discretely in a manner extending from the pedestal body and the pedestal body toward the material axis, and each tip surface is formed so as to contact the peripheral surface of the pipe. A mounting plate comprising a plurality of protrusions. 5. The mounting plate according to claim 4 , wherein at least the projections of the base are made of a thermoplastic elastomer having a vibration absorbing function.

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