Support device for structure

Abstract

To provide a new support device for a structure which stabilizes damping force applied to the structure.SOLUTION: A support device 100 of a structure 10 according to the present disclosure includes a friction member 30 that is disposed on a radially outer side of the structure 10 and allows sliding friction with the structure 10, an elastic member 40 that is disposed on a radially outer side of the friction member 30, and a support member 20 that is disposed on a radially outer side of the elastic member 40 and surrounds the structure 10 from the radially outer side, wherein the elastic member 40 has a smaller longitudinal elastic modulus than the friction member 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a support device for a structure. [Background technology]

[0002] Japan is a country where earthquakes occur frequently, and the damage caused by earthquakes ranges from damage to facilities to the failure of electrical equipment due to water leaks. In particular, damage to piping accounts for a large proportion of the total damage. Plants use piping of various uses and shapes, and seismic response analyses, including support structures, are performed to improve the seismic resistance of piping (e.g., Non-Patent Documents 1 and 2). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Tsuneo Takahashi and Akira Maekawa, "Seismic response of piping systems considering plastic deformation of supporting structures", NT-4, INSS JOURNAL, Vol.19 (2012), pp. 75-83 [Non-patent document 2] Akira Maekawa and Michiaki Suzuki, "Estimation Method for Seismic Soundness of Piping Design Using Elastic-Plastic Support - Simple Evaluation to Prevent Zipping Phenomenon", 2018 Annual Meeting of the Japan Society of Mechanical Engineers, No. J1010102 (2018) Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional pipe support structures, metal-to-metal contact between the pipe and the support can cause rattle or twisting in the pipe axial direction. This makes the frictional and other damping forces acting on the pipe unstable, making it difficult to reflect these forces in earthquake response analyses. Therefore, earthquake response analyses are often performed without considering frictional and other damping forces and without fixing the pipe axial direction. However, in actual structures, the pipe is subjected to axial frictional forces from the support due to friction and minute vibration collisions, and the axial displacement of the pipe may not be as large as the results of the response analysis. As a result, excessive measures such as adding or strengthening supports based on the response analysis have sometimes been taken, leaving room for improvement in this area.

[0005] The present disclosure addresses the above-mentioned problems, and has as its objective to provide a new support device for a structure that stabilizes the damping force applied to the structure. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the support device of the present disclosure includes: [1] A support device for a structure, a friction member disposed radially outside the structure and allowing sliding friction between the structure and the friction member; an elastic member disposed radially outward of the friction member; a support member disposed radially outside the elastic member and surrounding the structure from the radially outside; Equipped with The elastic member has a modulus of longitudinal elasticity smaller than that of the friction member.

[0007] Further, the support device of the present disclosure is [2] In the configuration [1] above, it is preferable that the support member has a plurality of members and further includes a fastening member that connects the plurality of members while adjusting the distance between them, thereby making it possible to adjust the load with which the friction member presses the structure.

[0008] Further, the support device of the present disclosure is [3] In the above configuration [2], it is preferable that the fastening member further has an elastic element disposed between the fastening member and the support member.

[0009] Further, the support device of the present disclosure is [4] In the configuration described in any one of the above [1] to [3], it is preferable that the friction members are arranged intermittently in the circumferential direction of the cylindrical structure.

[0010] Further, the support device of the present disclosure is [5] In the configuration described in any one of the above [1] to [4], the friction member preferably contains at least one of polyamide, phenolic resin, and polypropylene resin.

[0011] Further, the support device of the present disclosure is [6] In the configuration described in any one of the above [1] to [5], the elastic member preferably includes at least one of silicone rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber, and fluororubber. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to provide a new support device for a structure that stabilizes the damping force applied to the structure. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a front view showing a support device for a structure according to a first embodiment of the present disclosure. [Figure 2] 1 is a perspective view showing a support device for a structure according to a first embodiment of the present disclosure. [Figure 3] 5 is a diagram showing the relationship between the fastening force of the fastening member and the damping force (friction force) in the pipe axis direction in the support device for a structure according to the first embodiment of the present disclosure. FIG. [Figure 4]10 is a diagram showing the relationship between the displacement of the structure in the pipe axis direction and the load in the pipe axis direction applied to the structure when the support device for the structure according to the first embodiment of the present disclosure is used. FIG. [Figure 5] 10 is a diagram showing the relationship between the displacement of the structure in the pipe axis direction and the load in the pipe axis direction applied to the structure when a conventional support device that does not use a friction member or an elastic member is used. FIG. [Figure 6] FIG. 10 is a front view showing a support device for a structure according to a second embodiment of the present disclosure. [Figure 7] FIG. 10 is a front view showing a support device for a structure according to a third embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present disclosure will be described in more detail below with reference to the drawings.

[0015] 1 is a front view showing a support device 100 for a structure 10 according to a first embodiment of the present disclosure. In this embodiment, the structure 10 is a cylindrical pipe that is used in, for example, a nuclear power plant or the like and is required to have earthquake resistance, and the support member 20 is a pipe support that has an arc portion 21 that is arc-shaped when viewed axially (as viewed from the Z-axis direction shown in FIGS. 1 and 2 ) and surrounds a portion of the structure 10 at an axial position from the radial outside.

[0016] In this embodiment, the left-right direction in Fig. 1 is the X-axis direction, the up-down direction is the Y-axis direction, and the direction perpendicular to the paper surface is the Z-axis direction. Furthermore, the radially outward direction refers to the direction away from the Z-axis along a line passing through the Z-axis of the support device 100 in Fig. 1 and perpendicular to the Z-axis, and the radially inward direction refers to the direction toward the Z-axis along this line. The circumferential direction is the direction of rotation around the Z-axis. The structure 10 is fixed in the radial direction by the support device 100, and in the Z-axis direction, a frictional force acts between the structure 10 and the support device 100 in at least the Z-axis direction (pipe axis direction).

[0017] As shown in Fig. 1, the support member 20 has an arc shape when viewed in the Z-axis direction, and includes a pair of arc portions 21 arranged symmetrically with respect to the X-axis, and flange portions 23 arranged symmetrically with respect to the X-axis and extending outward in the X-axis direction from both ends of the arc portions 21. The support members 20 are fastened to each other by fastening members 50 including bolts 51 and nuts 52 that fasten the flange portions 23 together. Furthermore, the flange portions 23 of the support member 20 are clamped and fixed by fixing members 60 from both sides perpendicular to the plane of Fig. 1 (both sides in the Z-axis direction) (see Fig. 2). The support member 20 can be formed from a material such as stainless steel or aluminum.

[0018] Provided at a radial position between the structure 10 and the support member 20 are a friction member 30 that is disposed radially outside the structure 10 and allows sliding friction in the axial direction (Z-axis direction) between the structure 10 and the support member 20, and an elastic member 40 that is disposed radially outside the friction member 30 and fixed thereto. The radially outer surface of the elastic member 40 is fixed to the radially inner surface of the arc portion 21 of the support member 20 by means of adhesion or the like.

[0019] 1, the friction members 30 and the elastic members 40 are arranged intermittently in the circumferential direction, with two above the X axis and two below the X axis. In this embodiment, the friction members 30 and the elastic members 40 are arranged intermittently at the same circumferential position. This configuration can improve the workability when fixing the friction members 30 and the elastic members 40 to the inner surface of the support member 20 and the ease of maintenance during use.

[0020] However, the circumferential arrangement of the friction members 30 and the elastic members 40 is not limited to the example in Fig. 1, and for example, only the elastic members 40 may be arranged continuously in the circumferential direction of the arc portions 21 of the support members 20 on the upper side (positive side in the Y-axis direction) and lower side (negative side in the Y-axis direction) in Fig. 1, and only the friction members 30 may be arranged intermittently in the circumferential direction. Also, both the friction members 30 and the elastic members 40 may be arranged continuously in the circumferential direction of the arc portions 21 of the support members 20 on the upper side (positive side in the Y-axis direction) and lower side (negative side in the Y-axis direction) in Fig. 1.

[0021] In this embodiment, the friction member 30 is provided for the purpose of applying a stable frictional force (damping force) in the pipe axis direction (Z-axis direction) between the structure 10 and the support member 20. In this embodiment, polyamide is used for the friction member 30. By bringing the support member 20 and the structure 10 into contact via the friction member 30, it is possible to easily apply a predetermined frictional force corresponding to the vertical load at all times. Furthermore, by fixing the friction member 30 to the support member 20 via the elastic member 40, it is possible to uniformize the surface pressure of the friction member 30 acting on the structure 10. With this configuration, the frictional force acting on the structure 10 with the friction member 30 can be further stabilized.

[0022] The material used for the friction member 30 is not limited to the above-mentioned polyimide. The material used for the friction member 30 may be, in addition to polyimide, for example, a phenolic resin or a polypropylene resin, and preferably includes at least one of these. In this embodiment, the static friction coefficient and the dynamic friction coefficient between the friction member 30 and the structure 10 are 0.16. To obtain a stable damping force, it is preferable that the difference between the static friction coefficient and the dynamic friction coefficient between the friction member 30 and the outer surface of the structure 10 is close to 0. In other words, it is preferable that the difference between the static friction coefficient and the dynamic friction coefficient between the friction member 30 and the structure 10 is small. The static friction coefficient and the dynamic friction coefficient may conform to JIS K7125:1999, or may be measured by installing a pipe (structure 10) on the support structure and conducting a load test in the pipe axial direction.

[0023] As described above, by reducing the difference between the static friction coefficient and the dynamic friction coefficient, it is possible to effectively suppress the disturbance of the load when the structure 10 is displaced in the pipe axial direction.

[0024] Furthermore, it is preferable that the modulus of longitudinal elasticity of the elastic member 40 is smaller than the modulus of longitudinal elasticity of the friction member 30. With this configuration, even if there is a bias in the surface pressure of the friction member 30 acting on the structure 10, the elastic member 40 can deform to equalize the surface pressure. With this configuration, the frictional force of the friction member 30 acting on the structure 10 can be further stabilized.

[0025] In this embodiment, silicone rubber is used for the elastic member 40, but the present invention is not limited to this. The elastic member 40 preferably contains at least one of silicone rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber, and fluororubber. By using these materials for the elastic member 40, the elastic member 40 can be manufactured inexpensively and have a smaller Young's modulus than the friction member 30.

[0026] As shown in Figure 2, the fixing member 60 includes a rectangular contact portion 61 that contacts the flange portion 23 of the support member 20 and extends in the XY-axis plane to clamp and fix the flange portion 23 from both sides in the Z-axis direction, a rectangular support portion 63 that extends in the YZ-axis plane and is fixed to the contact portion 61, and a rectangular mounting plate 65 that extends in the XZ-axis plane and is fixed to both the contact portion 61 and the support portion 63.

[0027] The support device 100 according to this embodiment is fixed to a base 70 with four fixing members 60 shown in Fig. 2 clamping the flange portion 23 of the support member 20 from both sides in the Z-axis direction. The base 70 is, for example, a floor member in a plant. With this configuration, movement of the support member 20 relative to the base 70 in the pipe axis direction (Z-axis direction) is restricted, and the structure 10 is fixed in a state where it can slide and frictionally move in the pipe axis direction (Z-axis direction) against the friction member 30 attached to the support member 20 via the elastic member 40.

[0028] In this embodiment, as shown in FIG. 1 , the support members 20 are fastened to one another by fastening members 50, including bolts 51 and nuts 52 that fasten the flange portions 23 together. The distance between the support members 20 in the Y-axis direction can be adjusted by adjusting the fastening force of the fastening members 50, thereby adjusting the pressing load applied from the friction member 30 to the outer surface of the structure 10. FIG. 3 is a diagram showing the relationship between the fastening force (horizontal axis) of the fastening members 50 and the damping force (frictional force) acting from the friction member 30 in the pipe axis direction (Z-axis direction) of the structure 10. The dashed-dotted line in FIG. 3 is a linear approximation of each plot, which is an actual measured value. As shown in FIG. 3 , there is a roughly proportional relationship between the fastening force of the fastening members 50 and the damping force (frictional force), and the damping force (frictional force) can be adjusted by adjusting the fastening force of the fastening members 50. The slope in FIG. 3 is a coefficient (frictional coefficient κ) that converts the fastening force to the damping force, which will be described later.

[0029] As shown in FIG. 3, there is a proportional relationship between the fastening force of the fastening member 50 and the damping force (friction force). f is the fastening force T f Using this, it can be expressed as the following formula (1).

[0030]

number

[0031] Therefore, the acceleration α in the direction in which the structure 10 (pipe) slides can be expressed by the following equation (2).

[0032]

number

[0033] By using equation (2), it is possible to perform a response analysis of the axial displacement of the pipe against an arbitrary fastening force.

[0034] Next, Figure 4 shows the load-displacement characteristics when a steady-state amplitude displacement in the pipe axis direction (Z-axis direction) is applied to the support device 100 of this embodiment, to which the cylindrical structure 10 shown in Figures 1 and 2 is attached.

[0035] To obtain the load-displacement characteristics shown in Figure 4, we first input the acceleration data of the seismic waves from El Centro (NS) (NS in parentheses indicates the north-south direction) into a single-degree-of-freedom system with a natural frequency of 5 Hz and a damping ratio of 1%, and then based on the cumulative deformation (225 mm) of the resulting response displacement, we applied a cumulative deformation (2250 mm) equivalent to 10 waves of that amount in the form of a sine wave. The amplitude and frequency were set to ±50 mm and 0.2 Hz, respectively. The fastening force was set to 200 N each for the two bolts 51, for a total of 400 N.

[0036] 4, no load disturbance is observed when the structure 10 is displaced in the pipe axis direction, and a stable bilinear load-displacement characteristic can be observed regardless of the load application direction. This is thought to be because, by supporting the structure 10 via the friction members 30, a predetermined friction force (damping force) corresponding to the fastening force (normal load) by the fastening members 50 can always be applied in the pipe axis direction (Z-axis direction). Furthermore, even if there is a bias in the surface pressure of the friction members 30 acting on the structure 10, the elastic members 40 can deform and equalize the surface pressure, which is thought to further stabilize the friction force of the friction members 30 acting on the structure 10.

[0037] On the other hand, FIG. 5 shows the load-displacement characteristics when the structure is directly supported by the metal support member 20 without using the conventional friction member 30 and elastic member 40.

[0038] 5, load disturbances are observed when the structure 10 is displaced significantly in the pipe axis direction. This is thought to be because, for example, when an unbalanced load acts on the structure 10 and the axis of the structure 10 is tilted relative to the support device 100, a large load is applied near the support device 100 due to point contact between the support member 20 and the structure 10. On the other hand, in this embodiment, it is thought that point contact can be avoided by employing the friction member 30 and the elastic member 40. Therefore, it is thought that the occurrence of rattle and twisting in the pipe axis direction due to metal contact between the pipe and the support, which has been a problem in conventional pipe support structures, can be effectively suppressed.

[0039] As described above, this embodiment provides a support device 100 for a structure 10, which includes a friction member 30 disposed radially outside the structure 10 and allowing sliding friction between the structure 10 and the friction member 30; an elastic member 40 disposed radially outside the friction member 30; and a support member 20 disposed radially outside the elastic member 40 and surrounding the structure 10 from the radial outside. The elastic member 40 is configured to have a smaller modulus of longitudinal elasticity than the friction member 30. By adopting this configuration, the structure 10 is supported via the friction member 30, allowing a predetermined frictional force (damping force) to be constantly applied in the pipe axis direction (Z-axis direction). Furthermore, even if the surface pressure of the friction member 30 acting on the structure 10 is uneven, the elastic member 40 can deform to equalize the surface pressure. Therefore, the frictional force of the friction member 30 acting on the structure 10 can be stabilized. By adopting this support device 100, frictional forces and the like can be easily reflected in the response analysis of the structure, enabling more accurate seismic response analysis.

[0040] Furthermore, in this embodiment, the support member 20 has a plurality of members, and is configured to further include fastening members 50 that connect the plurality of members while adjusting the distance between them, thereby making it possible to adjust the load with which the friction member 30 presses the structure 10. By employing such a configuration, it is possible to arbitrarily adjust the damping force (friction force) acting from the friction member 30 on the structure 10, and to apply an appropriate damping force to the structure 10.

[0041] In addition, in this embodiment, the difference between the static friction coefficient and the dynamic friction coefficient between the friction member 30 and the outer surface of the structure 10 is configured to be close to 0. By adopting such a configuration, it is possible to effectively suppress the disturbance of the load when the structure 10 is displaced in the pipe axial direction.

[0042] In this embodiment, the friction members 30 are configured to be disposed intermittently in the circumferential direction of the cylindrical structure 10. By employing such a configuration, it is possible to improve the workability when fixing the friction members 30 and the elastic member 40 to the inner surface of the support member 20 and the ease of maintenance during use.

[0043] In this embodiment, the friction member 30 is configured to contain at least one of polyamide, phenolic resin, and polypropylene resin. By adopting such a configuration, a predetermined static friction force and dynamic friction force are applied between the friction member 30 and the structure 10, and an appropriate damping force is applied to the structure 10 such as a pipe, and disturbance of the load when the structure 10 is displaced in the pipe axial direction can be effectively suppressed.

[0044] In this embodiment, the elastic member 40 is configured to include at least one of silicone rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber, and fluororubber. By adopting such a configuration, the modulus of longitudinal elasticity of the elastic member 40 can be made smaller than that of the friction member 30, making it possible to equalize the surface pressure of the friction member 30 acting on the structure 10. This further stabilizes the frictional force acting on the structure 10 with the friction member 30.

[0045] Next, a support device 200 for a structure 110 according to a second embodiment of the present disclosure will be described with reference to FIG. 6 and other figures.

[0046] In this embodiment, too, the structure 110 is a cylindrical pipe used in, for example, a nuclear power plant, and the support member 120 is a pipe support having an enclosing portion 121 that has an approximately U-shape that is upside down when viewed axially (when viewed from the Z-axis direction perpendicular to the X-axis and Y-axis shown in Figure 6) and surrounds a portion of the axial position of the structure 110 from the radial outside.

[0047] In this embodiment, the left-right direction in Fig. 6 is the X-axis direction, the up-down direction is the Y-axis direction, and the direction perpendicular to the paper surface is the Z-axis direction. Furthermore, the radially outward direction refers to the direction away from the Z-axis along a straight line passing through the Z-axis of the support device 200 in Fig. 6 and perpendicular to the Z-axis, and the radially inward direction refers to the direction toward the Z-axis along this straight line. The circumferential direction is the direction of rotation around the Z-axis. The structure 110 is fixed in the radial direction by the support device 200, and is slidable in the Z-axis direction due to frictional force acting between the structure 110 and the support device 200 in at least the Z-axis direction (pipe axis direction).

[0048] 6, the support member 120 is a member having a substantially upside-down U-shape, and includes an enclosing portion 121 that surrounds the upper portion of the structure 110 from the radially outer side via a friction member 130 and an elastic member 140, and a base plate 123 that is a flat plate-like member that supports the lower end portion of the structure 110 via the friction member 130 and the elastic member 140. The support device 200 also includes a fastening screw 125 (fastening member) for fastening the lower end portion of the enclosing portion 121, which has a male thread portion, to the base plate 123. In this embodiment, the lower end portion of the enclosing portion 121 has a male thread portion that is threadedly engaged with the fastening screw 125. That is, the lower end portion of the enclosing portion 121 constitutes a part of the fastening member.

[0049] In this embodiment, friction members 130 and elastic members 140 are provided at three circumferential locations on the radially outer side of the structure 110, in that order from the radially inner side. The materials of the friction members 130 and the elastic members 140 can be selected from the same materials as the friction members 30 and the elastic members 40 used in the support device 100 according to the first embodiment. In this embodiment as well, the friction members 130 and the elastic members 140 are intermittently arranged at three circumferential locations. The radially outer surface of the elastic member 140 is fixed to the inner surface of the surrounding portion 121 of the support member 120 and the upper surface of the base plate 123 by means of adhesion or the like.

[0050] The friction member 130 is disposed radially outside the structure 110 and allows sliding friction in the pipe axis direction (Z-axis direction) between the friction member 130 and the structure 110. The elastic member 140 is formed of a material having a smaller modulus of longitudinal elasticity than the friction member 130.

[0051] 6, by tightening the lower fastening screw 125 with the upper fastening screw 125 of the base plate 123 placed in an appropriate position, the surrounding part 121 moves downward in FIG. 6 (in the negative Y-axis direction), shortening the vertical distance from the base plate 123 and compressing and deforming the friction member 130 and the elastic member 140, thereby increasing the load with which the friction member 130 presses against the outer surface of the structure 110. In other words, the fastening screw 125 and the male threaded part at the lower end of the surrounding part 121 constitute a fastening member that makes it possible to adjust the load with which the friction member 130 presses against the structure 110.

[0052] The upper part of the surrounding part 121, where the male thread portion is not provided, preferably has a rectangular cross section. As a result, the radially inner surface of the upper part (the part on the positive side in the Y-axis direction) of the surrounding part 121 does not have a curvature in the Z-axis direction, so that the elastic member 140 and the friction member 130 can be easily attached to the inner surface of the surrounding part 121 by adhesive or the like. Note that, in addition to the rectangular cross section described above, the upper part of the surrounding part 121 may also have a circular or annular cross section, similar to the lower part where the male thread portion is provided. The surrounding part 121 can be formed from a material such as stainless steel or aluminum.

[0053] 6, the friction members 130 and the elastic members 140 are each disposed intermittently in the circumferential direction, with two attached to each of the surrounding portion 121 above the X axis and one attached to each of the base plate 123 below the X axis. In this embodiment, the friction members 130 and the elastic members 140 are disposed intermittently at the same circumferential position. This configuration can improve the ease of work when fixing the friction members 130 and the elastic members 140 to the radially inner surface of the surrounding portion 121 and the upper surface of the base plate 123, as well as the ease of maintenance during use.

[0054] 6, for example, only the elastic member 140 may be arranged continuously in the circumferential direction on the inner surface of the surrounding portion 121 or the upper surface of the base plate 123, and only the friction member 130 may be arranged intermittently in the circumferential direction on the inner surface of the surrounding portion 121 or the upper surface of the base plate 123. Furthermore, both the friction member 130 and the elastic member 140 may be arranged continuously in the circumferential direction on the inner surface of the surrounding portion 121 or the upper surface of the base plate 123.

[0055] In this embodiment, the friction member 130 is provided for the purpose of applying a stable frictional force (damping force) in the tube axis direction (Z-axis direction) between the structure 110 and the support member 120. In this embodiment, polyamide is used for the friction member 130. By bringing the support member 120 and the structure 110 into contact with each other via the friction member 130, it is possible to easily apply a predetermined frictional force corresponding to a vertical load at all times. Furthermore, by fixing the friction member 130 to the support member 120 via the elastic member 140, it is possible to uniformize the surface pressure of the friction member 130 acting on the structure 110. With this configuration, the frictional force acting on the structure 110 with the friction member 130 can be further stabilized.

[0056] Next, a support device 300 for a structure 10 according to a third embodiment of the present disclosure will be described with reference to FIG.

[0057] The support device 300 according to this embodiment is similar in configuration to the first embodiment, except that the fastening member 150 includes elastic elements 53a, 53b, such as spring washers and disc springs, in addition to the bolt 51 and nut 52. Therefore, only the differences from the first embodiment will be described here. Also, parts having the same configuration as those in the first embodiment will be described using the same reference numerals.

[0058] 7 is a front view showing a support device 300 for a structure 10 according to a third embodiment of the present disclosure. In this embodiment, the structure 10 is, for example, a cylindrical pipe, and the support member 20 is a pipe support having an arc portion 21 that is arc-shaped in the axial view and surrounds a portion of the structure 10 at an axial position from the radial outside.

[0059] 7, the support member 20 has an arc shape when viewed in the Z-axis direction, and includes a pair of arc portions 21 that are arranged symmetrically with respect to the X-axis, and flange portions 23 that are arranged symmetrically with respect to the X-axis and extend outward in the X-axis direction from both ends of the arc portions 21. The support members 20 are connected to each other by fastening members 150. The fastening members 150 include a bolt 51 and a nut 52 that fasten the flange portions 23 together, and elastic elements 53a and 53b that are arranged between the bolt 51 and the support member 20 and function as compression springs in the axial direction of the bolt 51.

[0060] As in the first embodiment, a friction member 30 is disposed radially outside the structure 10 and allows sliding friction in the axial direction (Z-axis direction) between the structure 10 and the support member 20, and an elastic member 40 is disposed radially outside the friction member 30 and fixed thereto. The radially outer surface of the elastic member 40 is fixed to the radially inner surface of the arc portion 21 of the support member 20 by means of adhesion or the like.

[0061] In this embodiment, as shown in FIG. 7 , the elastic element 53a can be disposed between the head of the bolt 51 and the upper flange portion 23. The elastic element 53b can be disposed between the nut 52 and the lower flange portion 23. With this configuration, even if the structure 10 is tilted around the X-axis, for example, the elastic elements 53a and 53b are disposed between the head of the bolt 51 and the upper flange portion 23, and between the nut 52 and the lower flange portion 23. Therefore, the load with which the friction member 30 presses the structure 10 is determined by the amount of elastic deformation (amount of compressive deformation) of these elastic elements 53a and 53b, and is therefore unlikely to change. Therefore, the frictional force of the friction member 30 acting on the structure 10 can be further stabilized.

[0062] As described above, in this embodiment, the fastening member 150 is configured to further include the elastic elements 53a, 53b arranged between the fastening member 150 and the support member 20. By employing such a configuration, even if the structure 10 is tilted, it is possible to suppress fluctuations in the load with which the friction member 30 presses the structure 10. Therefore, it is possible to stabilize the friction force in the pipe axis direction acting from the friction member 30 to the structure 10.

[0063] Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications or alterations based on the present disclosure. Therefore, it should be noted that these modifications and alterations are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined or divided into one.

[0064] For example, in the first to third embodiments, the structures 10, 110 are assumed to be pipes, and the support members 20, 120 are assumed to be arc-shaped or U-shaped support members 20, 120 as shown in Figures 1, 2, 6, and 7, but the present invention is not limited to this form and can be applied to structures and support members of other shapes.

[0065] For example, the support member 120 in FIG. 6 may be configured so that it is separated into left and right halves at the top, and the separated left and right support members are connected by a fastening member.

[0066] In addition, instead of the arc-shaped arc portion 21 having flange portions 23 at both ends as shown in Figures 1 and 7, the support member may be configured to support the structure by fastening flange portions provided at the circumferential ends of the arc portion that covers approximately one circumference of the structure in the circumferential direction via a friction member and an elastic member together with screws or the like.

[0067] Furthermore, the support members 20, 120 in Figures 1, 6 and 7 are constructed and arranged to support the structure 10, 110 (piping) arranged to extend in the horizontal direction via the friction members 30, 130 and the elastic members 40, 140, but are not limited to this embodiment and may be configured to support a structure arranged in another position, such as a structure arranged to extend in the vertical direction and the support members constructed and arranged to support this structure via the friction members and the elastic members. [Explanation of symbols]

[0068] 10,110 structures 20,120 Support member 21 Arc section 23 Flange 30,130 Friction materials 40,140 Elastic member 50,150 Fastening members 51 volts 52 Nut 53a, 53b Elastic elements 60 Fixing member 61 Contact part 63 Support part 65 Mounting plate 70 base 100,200,300 Support device 121 Encirclement 123 base plate 125 Fastening screws (fastening components)

Claims

1. A support device for a structure, a friction member disposed radially outside the structure and allowing sliding friction between the structure and the friction member; an elastic member disposed radially outward of the friction member; a support member disposed radially outside the elastic member and surrounding the structure from the radially outside; Equipped with The elastic member has a modulus of longitudinal elasticity smaller than that of the friction member.

2. 2. The support device according to claim 1, wherein the support member has a plurality of members, and further comprises a fastening member that connects the plurality of members while adjusting the distance between the members, thereby making it possible to adjust the load with which the friction member presses the structure.

3. The support device of claim 2 , wherein the fastening member further comprises a resilient element disposed between the fastening member and the support member.

4. The support device according to claim 1 or 2, wherein the friction members are arranged intermittently in the circumferential direction of the cylindrical structure.

5. The support device according to claim 1 or 2, wherein the friction member contains at least one of polyamide, phenolic resin, and polypropylene resin.

6. 3. The support device according to claim 1, wherein the elastic member includes at least one of silicone rubber, chloroprene rubber, nitrile rubber, ethylene propylene rubber, and fluororubber.

Images