JP6623075B2 - Wire mesh spring vibration isolator - Google Patents

Description

  Embodiments described herein relate generally to a wire mesh spring vibration isolator.

  In recent years, shipboard noise code revisions that strengthen noise regulations in residential areas and SOLAS treaty revisions that make shipboard noise codes mandatory have been adopted, and noise countermeasures on ships have become increasingly important. As main noise sources in a ship, there are vibrations of main engines / auxiliaries in engine rooms, vibrations of pipes through which exhaust gas from these main engines / auxiliaries and the like flows. As a noise countermeasure, it is effective to keep the engine room and piping as far away from the residential area as possible, but in the case of medium-sized and small boats, it is practically impossible to dispose them far from the residential area.

  If a structure such as a peripheral wall of a residential area is in contact with a pipe through which exhaust gas flows, vibration of the pipe will propagate to the residential area, so a vibration isolator may be interposed between the structure and the pipe. It is conceivable (for example, Patent Document 1).

Japanese Patent No. 2603666

  A wire mesh spring is an example of an optimal material for a vibration-proof material for ships. Unlike rubber and the like, the wire mesh spring does not deteriorate even at a high temperature, and therefore can support a pipe heated to a high temperature by exhaust gas. In the unlikely event of a fire, there is no significant dimensional change because it does not burn out. Since it has a non-linear load characteristic that hardens when compressed, resonance of the wire mesh spring itself can be suppressed. There is no significant dimensional change even when an unexpectedly large load is applied. Since the dimensional change is smaller than that of other springs, a sufficient anti-vibration effect can be obtained even in a narrow space between the structure and the pipe.

  On the other hand, the wire mesh spring cannot perform sufficiently unless it is compressed to a predetermined thickness. Even a small dimensional change greatly affects the load characteristics, so it is particularly important to manage the amount of compression.

  When the wire mesh spring is applied to the configuration in which the pipe is fixed with the U bolt, it is conceivable to hold the U bolt with the first to fourth wire mesh springs in order to absorb the vibration of the U bolt propagated from the pipe. However, since the U bolt has a shape in which one end and the other end are open, the piping is not completely restrained. Even if the vibration of the U bolt is absorbed, the pipe is displaced in a direction not restrained by the U bolt, so that the pipe repeatedly collides with the structure to generate noise.

  In order to prevent this, it is necessary to add a fifth wire mesh spring also in the gap between the pipe and the structure. Even if the compression amount of the first to fourth wire mesh springs is adjusted, if the fifth wire mesh spring is deformed, the compression amounts of the first to fourth wire mesh springs change and become unclear. In consideration of the fifth wire mesh spring, it is difficult to adjust the compression amount of the first to fourth wire mesh springs.

  In addition, when a fifth wire mesh spring is added, a spring seat for holding the fifth wire mesh spring must be welded to the structure. When the structure to which the spring seat is welded is a wall surface or a ceiling, the fifth wire mesh spring may come off the spring seat and fall due to gravity.

  On the other hand, if the pipe includes a leg portion welded integrally with the pipe, the first to fourth wire mesh springs are interposed between the leg portion and the structure, The amount of compression can be strictly controlled. However, even if a leg-integrated pipe can be adopted for a ship to be built in the future, it is not easy to weld the leg to the pipe of a ship already in service. In the configuration based on the leg-integrated piping, it is difficult to apply to the existing piping.

  An object of the present invention is to provide a wire mesh spring vibration isolator capable of being assembled to an existing pipe and capable of being assembled in a state where the wire mesh spring is adjusted to an optimal compression amount by a simple operation. .

According to the embodiment, the wire mesh spring vibration isolator holds the pipe in a state of being separated from the first surface of the structure. The wire mesh spring vibration isolator includes a U bolt, a first locking nut, a second locking nut, a bridge member, first to fourth wire mesh springs, and first and second nuts. And. The U-bolt has first and second shaft portions that respectively penetrate the structure from the first surface to the second surface opposite to the first surface, and surrounds the pipe. The first locking nut is screwed into the threaded portion of the first shaft portion. The second locking nut is screwed into the threaded portion of the second shaft portion. The bridge member is inserted through the first and second shaft portions of the U-bolt so as to be freely inserted and removed, and faces the pipe in a state where the first and second shaft portions are inserted. The bridge member has a main body portion and a reinforcing portion. The main body is disposed between the first and second locking nuts and the first surface, and faces one side of the pipe and the first and second locking nuts; and It has the other surface opposite to the one surface. The reinforcing part has a contact part that stands up from the main body part toward the pipe and is cut out in a shape along the outer periphery of the pipe. The first wire mesh spring is interposed between the first surface and the other surface of the bridge member in a state where the first shaft portion of the U bolt is inserted, and the bridge member is connected to the pipe and the first surface. Biasing toward the locking nut . The second wire mesh spring is interposed between the first surface and the other surface of the bridge member in a state where the second shaft portion of the U bolt is inserted, and the bridge member is connected to the pipe and the second surface. Energize toward the locking nut . The 3rd wire mesh spring is installed in the 2nd surface in the state where the 1st axis part of U bolt was inserted. The 4th wire mesh spring is installed in the 2nd surface in the state where the 2nd axis part was penetrated. The first nut is screwed into a threaded portion formed on the first shaft portion of the U-bolt and applied to the urging force of the first and third wire mesh springs while being in contact with the third wire mesh spring. Accordingly, the distance between the first surface and the bridge member is maintained at a predetermined length. The second nut is screwed into a threaded portion formed on the second shaft portion of the U bolt, and in contact with the fourth wire mesh spring, the second nut is subjected to the urging force of the second and fourth wire mesh springs. Accordingly, the distance between the first surface and the bridge member is maintained at a predetermined length.

It is a perspective view which shows the wire mesh spring vibration isolator of 1st Embodiment assembled | attached to the structure and piping of a ship. It is a front view which shows the wire mesh spring vibration isolator shown by FIG. It is a side view which shows the wire mesh spring vibration isolator shown by FIG. It is a front view which shows the bridge member which concerns on 1st Embodiment shown by FIG. FIG. 3 is a perspective view showing the first damper structure shown in FIG. 2 with a part cut away. It is a graph which shows the load-deflection line of a wire mesh spring. It is a front view showing a bridge member concerning a 2nd embodiment. It is a side view which shows the bridge member which concerns on 3rd Embodiment. It is a side view which shows the bridge member which concerns on 4th Embodiment.

The wire mesh spring vibration isolator according to the first embodiment will be described below.
As shown in FIG. 2, the wire mesh spring vibration isolator 10 includes a U bolt 11, a bridge member 12, and first and second damper structures 13 and 14. The first and second damper structures 13, 14 include first to fourth wire mesh springs 41, 61, 42, 62.

  The first and second damper structures 13, 14 are provided on the first and second shaft portions 21, 22 of the U bolt 11, respectively. The bridge member 12 is installed so as to straddle the first and second damper structures 13 and 14 and faces the pipe 2. The U bolt 11 surrounds the pipe 2 from a direction different from that of the bridge member 12.

  Since the U bolt 11 can be removed from the bridge member 12 and disassembled, the wire mesh spring vibration isolator 10 can be applied to the existing pipe 2. Since the relative position between the first and second damper structures 13 and 14 and the pipe 2 is fixed with respect to the bridge member 12, the compression amount of the first and second damper structures 13 and 14 can be managed easily and strictly. it can. Since the bridge member 12 is biased toward the pipe 2, it is not necessary to add a fifth wire mesh spring in the gap between the pipe 2 and the structure 1. Hereinafter, each configuration will be described in detail with reference to FIGS. 1 to 6.

  FIG. 1 is a perspective view showing a wire mesh spring vibration isolator 10 in a state assembled to a ship. A wire mesh spring vibration isolator 10 shown in FIG. 1 is fixed to a ship structure 1 and supports the pipe 2, and absorbs the vibration of the pipe 2 so that the vibration of the pipe 2 does not propagate to the structure 1. The structure 1 is, for example, a peripheral wall such as a residential area, a floor, a ceiling, or the like, or a beam extending therefrom. The structure 1 has a first surface 1A facing the pipe 2 and a second surface 1B opposite to the first surface 1A. A plurality of assembly holes 3 penetrating from the first surface 1A to the second surface 1B are formed in the structure 1 for assembling the wire mesh spring vibration isolator 10.

  FIG. 2 is a front view showing the wire mesh spring vibration isolator 10 shown in FIG. As shown in FIG. 2, the wire mesh spring vibration isolator 10 includes a U bolt 11, a bridge member 12, and first and second damper structures 13 and 14.

  The U bolt 11 includes first and second shaft portions 21 and 22 and a connecting portion 23 that connects the first and second shaft portions 21 and 22. The connecting portion 23 is formed in an arc shape along the outer diameter of the pipe 2. The first and second shaft portions 21 and 22 extend linearly from one end and the other end of the connecting portion 23, respectively. Screw portions 24 and 25 are formed at the tips of the first and second shaft portions 21 and 22, respectively.

  FIG. 3 is a side view showing the wire mesh spring vibration isolator 10. FIG. 4 is a front view showing the bridge member 12. As shown in FIGS. 3 and 4, the bridge member 12 includes a main body portion 30 and a reinforcing portion 31.

  The main body 30 is formed in a flat plate shape longer than the diameter of the pipe 2. The main body 30 includes a first surface 30A that faces the pipe 2 and a second surface 30B that is opposite to the first surface. Through holes 32 and 33 through which the first and second shaft portions 21 and 22 of the U bolt 11 are inserted and removed are formed at both ends of the main body 30.

  The reinforcing part 31 stands from the one side of the main body part 30 toward the pipe 2. The reinforcing portion 31 is formed with a contact portion 34 cut out in an arc shape along the outer periphery of the pipe 2. The bridge member 12 can be manufactured at low cost by processing commercially available angle steel, for example.

  FIG. 5 is a perspective view showing the first damper structure 13 shown in FIG. 2 with a part cut away. As shown in FIG. 5, the first damper structure 13 includes first and third wire mesh springs 41, 42, caps 43, 44, plates 45, 46, a first cylindrical spacer 47, a shaft. A vibration absorbing mesh 48, a first nut 51, locking nuts 52, 53, 54, and washers 55, 56 are provided.

  Similarly, the second damper structure 14 shown in FIGS. 2 and 3 includes second and fourth wire mesh springs 61 and 62, caps 63 and 64, plates 65 and 66, and a second cylindrical spacer 67. And an axial vibration absorbing mesh 68, a second nut 71, locking nuts 72, 73, 74, and washers 75, 76.

  Since the configuration of the second damper structure 14 is substantially the same as the configuration of the first damper structure 13, the description of the second damper structure 14 is omitted, and the first damper structure 13 will be described below as a representative. To do.

  The first wire mesh spring 41 is installed on the first surface 1A of the structure 1 in a state where the first shaft portion 21 of the U bolt 11 is inserted. The third wire mesh spring 42 is installed on the second surface 1B of the structure 1 in a state where the first shaft portion 21 of the U bolt is inserted. In the present embodiment, the first wire mesh spring 41 is formed in the same shape as the third wire mesh spring 42.

  The first and third wire mesh springs 41 and 42 are filled with a wire mesh (metal mesh) obtained by knitting a stainless steel wire work-hardened by, for example, wire drawing, and compression-molded in the axial direction. The stainless steel wire is intertwined with each other in a complicated manner, and exhibits elasticity against a load in the compression direction. The stainless steel wire is a nonmagnetic stainless steel such as SUS304. In particular, when emphasizing corrosion resistance, SUS316 or the like may be used. When corrosion resistance is not important, steel wires other than stainless steel may be used.

  When the first and third wire mesh springs 41 and 42 are pressurized and then depressurized, the vibration is converted into heat by the friction between the stainless steel wires and attenuated. FIG. 6 is a graph showing load-deflection lines of the first and third wire mesh springs 41 and 42. As shown in FIG. 6, the first and third wire mesh springs 41 and 42 are hardened by increasing the spring constant as the load is increased, so that a large dimensional change does not occur. The dimension of the wire mesh spring vibration isolator 10 can be made smaller than other springs.

  In addition, the first and third wire mesh springs 41 and 42 have a hysteresis in which the load-deflection line when pressed and the load-deflection line when decompressed do not coincide. Since the spring constants of the first and third wire mesh springs 41 and 42 that are being attenuated change between pressurization and decompression, the resonance of the wire mesh spring vibration isolator 10 can be suppressed.

  On the other hand, the first and third wire mesh springs 41 and 42 are used so that an external force of compression is always applied to the structure in which the stainless steel wires are intertwined by plastic deformation accompanying compression, and no external force of tension is applied. Need to be careful.

  In order to exhibit the performance described above, the first and third wire mesh springs 41 and 42 need to be held in a state where an initial load is applied by an appropriate amount of compression. In this embodiment, the free heights of the first and third wire mesh springs 41 and 42 are 20 mm, and it is necessary to compress them to 16 mm in order to exhibit the desired performance.

  As shown in FIGS. 5 and 2, the first wire mesh spring 41 is always compressed while being sandwiched between the cap 43 and the plate 45. The second wire mesh spring 42 is always compressed while being sandwiched between the cap 44 and the plate 46.

  The caps 43 and 44 are each formed in a saucer shape having a shallow depth from a sheet metal or the like. In the center of the caps 43 and 44, holes through which the first shaft portion 21 of the U bolt 11 is inserted are formed.

  The plates 45 and 46 are formed in a disk shape having a diameter larger than that of the first and third wire mesh springs 41 and 42 from a sheet metal thicker than the caps 43 and 44. In the center of the plates 45 and 46, holes through which the first shaft portion 21 of the U bolt 11 is inserted are formed.

  The first cylindrical spacer 47 is formed in a cylindrical shape having a length L5. The first cylindrical spacer 47 is externally fitted to the first shaft portion 21 and is interposed between the plates 45 and 46.

  The shaft vibration absorbing mesh 48 is fitted in the assembly hole 3 of the structure 1 and is interposed between the assembly hole 3 and the first cylindrical spacer 47. The axial vibration absorbing mesh 48 is formed of a wire mesh spring similar to the first and third wire mesh springs 41 and 42, for example. You may form from other materials which have a damping function, such as a resin material.

The first nut 51 is screwed into the screw portion 24 of the first shaft portion 21 of the U bolt 11. The first nut 51 is in contact with the plate 46 via a washer 56.
The locking nuts 52, 53, 54 are screwed into the screw portion 24 of the first shaft portion 21 of the U bolt 11. The locking nut 52 is in contact with the first nut 51 from the side opposite to the washer 56. The locking nut 53 is in contact with the first surface 30 </ b> A of the main body 30 of the bridge member 12 via a washer 55. The locking nut 54 abuts against the locking nut 53 from the side opposite to the washer 55.

A procedure for assembling the wire mesh spring vibration isolator 10 to the existing pipe 2 in the wire mesh spring vibration isolator 10 configured as described above will be described.
In order to assemble the wire mesh spring vibration isolator 10 to the pipe 2, first, the wire mesh spring vibration isolator 10 is disassembled into each member.

Locking nuts 53 and 54 and a washer 55 are temporarily fixed to the screw portion 24 of the first shaft portion 21 of the disassembled U-bolt 11. The locking nuts 73 and 74 and the washer 75 are temporarily fixed to the screw portion 25 of the second shaft portion 22.
In the vicinity of the assembly hole 3 of the structure 1, the U bolt 11 is covered so as to surround the pipe 2, and the first and second shaft portions 21, 21 of the U bolt 11 are placed in the through holes 32, 33 of the bridge member 12. 22 is inserted.

The plate 45, the first cylindrical spacer 47, the first wire mesh spring 41, and the cap 43 in the first damper structure 13 are formed on the first shaft portion 21 of the U bolt 11 protruding from the through hole 32 of the bridge member 12. Are inserted in order.
Of the second damper structure 14, the plate 65, the second cylindrical spacer 67, the second wire mesh spring 61, and the cap 63 are formed on the second shaft portion 22 of the U bolt 11 protruding from the through hole 33 of the bridge member 12. Are inserted in order.

The shaft vibration absorbing meshes 48 and 68 are fitted into the assembly hole 3 of the structure 1, and the first and second shaft portions 21 and 22 of the U bolt 11 are inserted into the shaft vibration absorbing meshes 48 and 68.
The cap 44, the second wire mesh spring 42, the plate 46, and the washer 56 of the first damper structure 13 are inserted in order into the first shaft portion 21 protruding from the assembly hole 3 of the structure 1.
Similarly, the cap 64, the second wire mesh spring 62, the plate 66, and the washer 76 of the second damper structure 14 are sequentially inserted into the second shaft portion 22 protruding from the assembly hole 3 of the structure 1. To do.

Then, the first and second nuts 51 and 71 are screwed onto the first and second shaft portions 21 and 22 of the U bolt 11.
When the first nut 51 is tightened, the first nut 51 comes into contact with the third wire mesh spring 42 via the plate 46. When the first nut 51 is further tightened, the first and third wire mesh springs 41 and 42 held between the plates 45 and 46 are compressed.

When the first nut 51 is further tightened against the urging force of the first and third wire mesh springs 41, 42, the first nut 51 and the bridge member 12 are moved through the plates 45, 46. The first nut 51 cannot be tightened any more while being in contact with the cylindrical spacer 47.
At this position, the locking nut 52 is tightened to a position where it comes into contact with the first nut 51. The locking nuts 53 and 54 are tightened back to a position where they come into contact with the bridge member 12.

  Similarly, the second nut 71 is tightened against the urging force of the second and fourth wire mesh springs 61 and 62. At the positions where the plates 65 and 66 are in contact with the second cylindrical spacer 67 and the second nut 71 can no longer be tightened, the locking nuts 72, 73 and 74 are covered.

In this state, the first to fourth wire mesh springs 41, 61, 42, 62 are compressed to a predetermined thickness for exhibiting performance, in this embodiment, 16 mm.
The first and second wire mesh springs 41 and 61 installed on the first surface 1A of the structure 1 urge the bridge member 12 toward the pipe 2. The third and fourth wire mesh springs 42 and 62 installed on the second surface 1B urge the first and second nuts 51 and 71 in the direction opposite to the pipe 2.

  In the first shaft portion 21 of the U bolt 11, the bridge member 12 and the first nut 51 are held at a position where the urging force of the first wire mesh spring 41 and the urging force of the third wire mesh spring 42 are balanced. Has been. That is, the distance between the bridge member 12 and the first surface 1A of the structure 1 is held at a predetermined length L1. The distance between the first nut 51 and the second surface 1B of the structure 1 is maintained at a predetermined length L2.

  Similarly, in the second shaft portion 22 of the U bolt 11, the bridge member 12 and the second nut are positioned at positions where the urging force of the second wire mesh spring 61 and the urging force of the fourth wire mesh spring 62 are balanced. 71 is held. That is, the distance between the bridge member 12 and the first surface 1A of the structure 1 is held at a predetermined length L3. The distance between the second nut 71 and the second surface 1B of the structure 1 is maintained at a predetermined length L4.

  The predetermined length L1 is the sum of the thickness of the first wire mesh spring 41 after compression (16 mm in the present embodiment), the plate thickness of the cap 43, and the plate thickness of the plate 45. The predetermined length L2 is the sum of the thickness of the compressed third wire mesh spring 42 (16 mm in the present embodiment), the thickness of the cap 44, and the thickness of the plate 46.

  Similarly, the predetermined length L3 is the sum of the thickness of the second wire mesh spring 61 after compression (16 mm in this embodiment), the plate thickness of the cap 63, and the plate thickness of the plate 65. The predetermined length L4 is the total of the thickness of the fourth wire mesh spring 62 after compression (in this embodiment, 16 mm), the plate thickness of the cap 64, and the plate thickness of the plate 66.

  The length L5 of the first cylindrical spacer 47 depends on the plate thickness from the first surface 1A to the second surface 1B of the structure 1 and the thicknesses of the first and third wire mesh springs 41 and 42 after compression. And the plate thickness of the caps 43 and 44, which are spring seats. In other words, the first cylindrical spacer 47 adds the predetermined lengths L1 and L2 to the plate thickness from the first surface 1A to the second surface 1B of the structure 1 to increase the plate thickness of the plates 45 and 46. It is formed in the drawn length L5.

  Similarly, the length of the second cylindrical spacer 67 depends on the plate thickness from the first surface 1A to the second surface 1B of the structure 1 and the second and fourth wire mesh springs 61 and 62 after compression. And the plate thickness of the caps 63 and 64 which are spring seats. In other words, the second cylindrical spacer 67 adds the predetermined lengths L3 and L4 to the plate thickness from the first surface 1A to the second surface 1B of the structure 1 to increase the plate thickness of the plates 65 and 66. It is formed in the pulled length.

  According to the wire mesh spring vibration isolator 10 of the present embodiment configured as described above, the first and second nuts 51 and 71 are removed from the U bolt 11 and are inserted into the through holes 32 and 33 of the bridge member 12. The U bolt 11 can be freely inserted and removed. Since the U bolt 11 can be removed from the bridge member 12 and disassembled, the wire mesh spring vibration isolator 10 can be assembled to the existing pipe 2.

  In the state where the wire mesh spring vibration isolator 10 is assembled to the pipe 2, the bridge member 12 is spaced apart from the first surface 1A of the structure 1 by a predetermined length L1, L3. The supported pipe 2 is held in a state of being separated from the first surface 1A of the structure 1.

  When the pipe 2 is displaced in the direction of colliding with the structure 1, the first and second wire mesh springs 41 and 61 are compressed via the bridge member 12. The distance between the pipe 2 and the structure 1 is maintained by the first and second wire mesh springs 41 and 61 that are hardened when compressed. In the present embodiment, since the pipe 2 does not collide with the structure 1, a fifth wire mesh spring or the like is not required between the pipe 2 and the structure 1.

  When the pipe 2 vibrates and collides with the bridge member 12, the first and second wire mesh springs 41 and 61 are compressed and urge the bridge member 12 in a direction away from the structure 1. When the pipe 2 vibrates and collides with the connecting portion 23 of the U-bolt 11, the third and fourth wire mesh springs 42 and 62 are compressed and the first and second nuts 51 and 71 are separated from the structure 1. Energize in the direction. Since the first to fourth wire mesh springs 41, 61, 42, 62 convert the vibration of the pipe 2 into heat, the wire mesh spring vibration isolator 10 of the present embodiment can strongly attenuate the vibration of the pipe 2. .

  The wire mesh spring vibration isolator 10 according to the present embodiment includes shaft shake absorbing meshes 48 and 68 attached to the first and second shaft portions 21 and 22. When the pipe 2 vibrates and collides with the first or second shaft portions 21 and 22 of the U-bolt 11, the shaft vibration absorbing meshes 48 and 68 are compressed to convert the vibration into heat. Therefore, the wire mesh spring vibration isolator 10 of the present embodiment can attenuate vibrations in various directions.

  The wire mesh spring vibration isolator 10 according to the present embodiment includes a bridge member 12 that is in direct contact with the pipe 2. Since no deformation member such as the fifth wire mesh spring is interposed between the pipe 2 and the contact portion 34 of the bridge member 12, the bridge member 12 in contact with the pipe 2 is connected to the pipe 2. The relative position is determined uniquely. In the present embodiment, the first to fourth wire mesh springs 41 and 61 are used to adjust the optimum positions of the first and second nuts 51 and 71 with reference to the second surface 30B of the bridge member 12. , 42, 62 can be managed easily and strictly.

  The wire mesh spring vibration isolator 10 according to this embodiment includes first and second cylindrical spacers 47 and 67. The lengths L5 and L6 of the first and second cylindrical spacers 47 and 67 are formed in accordance with the optimal positions of the first and second nuts 51 and 71 with the bridge member 12 as a reference.

  Therefore, the compression amount of the first to fourth wire mesh springs 41, 61, 42, 62 can be achieved simply by tightening the first and second nuts so that the first and second cylindrical spacers 47, 67 come into contact with each other. Are controlled to a predetermined compression amount. The trouble of torque management and visual measurement can be eliminated, and the assembly work of the wire mesh spring vibration isolator 10 can be simplified.

  The bridge member 12 of the present embodiment has a reinforcing portion 31 in addition to the main body portion 30 serving as a reference for the first and second damper structures 13 and 14. The deformation of the main body 30 can be prevented by the reinforcing portion 31, and the compression amount of the first and second damper structures 13, 14 can be managed more strictly.

  The bridge member 12 of the present embodiment has an arcuate contact portion 34 along the outer periphery of the pipe 2. The load applied to the pipe 2 is dispersed throughout the contact portion 34. In the present embodiment, the contact portion 34 can prevent the displacement of the pipe 2 and the bridge member 12, and the compression amount of the first to fourth wire mesh springs 41, 61, 42, 62 based on the bridge member 12 can be reduced. It can be managed more strictly.

  The wire mesh spring vibration isolator 10 of this embodiment uses a wire mesh spring as a vibration isolator. Compared to a vibration isolator using rubber or coil springs as a vibration isolator, it is resistant to high heat and corrosive atmospheres, and the anti-vibration material does not burn off in a fire. The device is small, and no large dimensional change occurs even when an unexpected load is applied. Since the spring constant changes between pressurization and decompression, resonance hardly occurs. On the other hand, in an apparatus that uses a wire mesh spring as a vibration isolator, adjustment of the compression amount of the wire mesh spring becomes a problem during assembly.

  The wire mesh spring vibration isolator 10 of the present embodiment has a bridge member 12 together with the first to fourth wire mesh springs. Since the amount of compression of the wire mesh spring can be managed easily and strictly by the bridge member 12, it can be installed in various places without any difficulty.

  Next, second to fourth embodiments will be described. In the second to fourth embodiments, the shape of the bridge member 12 is different from that of the first embodiment. Other configurations are the same as those in the first embodiment. Therefore, in the second to fourth embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The second embodiment will be described with reference to FIG. In the second embodiment, the bridge member 80 has a contact portion 81 that is linearly cut along the outer periphery of the pipe 2. The contact part 81 contacts the pipe 2 at three points 81A, 81B, 81C. According to the second embodiment, since the shape of the contact portion 81 is simple, the processing of the bridge member 80 is easy. The load applied to the pipe 2 is dispersed at the three points 81A, 81B, 81C. As in the first embodiment, the bridge member 80 can prevent displacement between the pipe 2 and the bridge member 12.

  The third embodiment will be described with reference to FIG. In the third embodiment, the bridge member 90 includes a plurality of (for example, two) reinforcing portions 91 and 92. According to the third embodiment, the load applied to the pipe 2 is dispersed by the amount of the reinforcement portions 91 and 92 being increased to a plurality. The wire mesh spring vibration isolator 10 can be applied to the pipe 2 that is more fragile than the first embodiment. The bridge member 90 can be formed inexpensively by processing commercially available channel steel, for example.

The fourth embodiment will be described with reference to FIG. In the fourth embodiment, the bridge member 100 includes a reinforcing portion 101 that stands up toward the side opposite to the pipe 2. If the pipe 2 has sufficient strength, it is not necessary to distribute the load applied to the pipe 2 by the contact portion. In the fourth embodiment, since the contact portion is not processed in the reinforcing portion 101, the bridge member 100 can be processed at a lower cost. However, some embodiments of the present invention have been described. It is presented and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

  For example, in each embodiment, the locking nut, the washer, the cap, the plate, the shaft vibration absorbing mesh, and the cylindrical spacer are not essential components of the present invention and can be omitted. Although the anti-vibration device is composed of wire mesh springs of the same size, the wire mesh springs of different sizes may be combined and each wire mesh spring may be compressed to an optimal compression amount.

  DESCRIPTION OF SYMBOLS 1 ... Structure, 1A ... 1st surface, 1B ... 2nd surface, 2 ... Piping, 10 ... Wire mesh spring vibration isolator, 11 ... U bolt, 12, 80, 90, 100 ... Bridge member, 21 ... 1st shaft part, 22 ... 2nd shaft part, 24, 25 ... threaded part, 34, 81 ... contact part, 41 ... 1st wire mesh spring, 42 ... 3rd wire mesh spring, 47 ... 1st Cylindrical spacer 51, first nut 61, second wire mesh spring 62, fourth wire mesh spring 67, second cylindrical spacer 71, second nut L1, L3, predetermined length.

Claims (2)

A wire mesh spring vibration isolator that holds a pipe in a state of being separated from the first surface of the structure,
U-bolts having first and second shaft portions penetrating the structure from the first surface to a second surface opposite to the first surface, and surrounding the pipe;
A first locking nut screwed into a threaded portion of the first shaft portion;
A second locking nut screwed into the threaded portion of the second shaft portion;
A bridge that has through-holes through which the first and second shaft portions of the U-bolts are removably inserted and faces the pipe in a state in which the first and second shaft portions are inserted through the through-holes. A member disposed between the first and second locking nuts and the first surface and facing the pipe and the first and second locking nuts; A main body portion having the other surface opposite to the surface, and a reinforcing portion having a contact portion that stands up from the main body portion toward the pipe and is cut out in a shape along the outer periphery of the pipe. A bridge member;
The U-bolt is interposed between the first surface and the other surface of the bridge member in a state where the first shaft portion is inserted, and the bridge member is connected to the pipe and the first locking member. A first wire mesh spring biasing toward the nut ;
The U-bolt is interposed between the first surface and the other surface of the bridge member in a state where the second shaft portion is inserted, and the bridge member is connected to the pipe and the second locking member. A second wire mesh spring biasing toward the nut ;
A third wire mesh spring installed on the second surface in a state where the first shaft portion of the U bolt is inserted;
A fourth wire mesh spring installed on the second surface in a state where the second shaft portion of the U bolt is inserted;
The U-bolt is screwed into a threaded portion formed on the first shaft portion and resists the urging force of the first and third wire mesh springs in contact with the third wire mesh spring. A first nut for maintaining a predetermined length between the first surface and the bridge member;
The U-bolt is screwed into a threaded portion formed on the second shaft portion, and resists the urging force of the second and fourth wire mesh springs in contact with the fourth wire mesh spring. A second nut that maintains a predetermined length between the first surface and the bridge member;
A wire mesh spring vibration isolator. First and second cylindrical spacers interposed between the first and second nuts and the bridge member, respectively;
With the first cylindrical spacer in contact with the first nut and the bridge member, the distance between the first surface of the first shaft portion and the bridge member is maintained at the predetermined length. And
With the second cylindrical spacer in contact with the second nut and the bridge member, the distance between the first surface of the second shaft portion and the bridge member is maintained at the predetermined length. The wire mesh spring vibration isolator according to claim 1, further comprising the first and second cylindrical spacers.

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