Vibration damping member and method of using the vibration damping member

Abstract

The present invention provides a vibration damping member suitable for reducing the impact noise generated when driving piles into the ground using a pile driver. [Solution] The vibration damping members 100, 101, and 102 are attached to the pile 90 when driving the pile 90 into the ground using a pile driver. The pile 90 has a first surface 91 and a second surface 92 that are arranged parallel to each other in a direction perpendicular to the longitudinal direction. The vibration damping members 100, 101, and 102 satisfy at least one selected from the group consisting of (i) and (ii) below: (i) They are equipped with an external pressing part 10 that presses the first surface 91 and the second surface 92 of the pile 90 from the outside. (ii) They are equipped with an internal pressing part 30 that presses the first surface 91 and the second surface 92 of the pile 90 from the inside.

Description

Technical Field

[0001] The present invention relates to a vibration damping member used by attaching it to a pile when driving the pile into the ground using a pile driver, and a method of using the vibration damping member.

Background Art

[0002] Generally, a pedestal for installing a solar power generation panel has a structure in which cross members assembled in a lattice shape are connected to the upper part of support piles driven into the ground. Usually, the support piles are driven into the ground using a pile driver. For example, in Patent Document 1, a pile driver aiming at improving the efficiency and safety of pile driving work for solar power generation facilities on steep land has been proposed. The pile driver of Patent Document 1 includes a pile driving work unit, a revolving body, and a traveling body. The pile driving work unit is composed of a driving machine or an excavator and a leader for moving the driving machine or the excavator up and down. The pile is struck along the leader and driven into the ground. Further, as a pile driver used for installing solar power generation facilities, for example, a small German pile driver (GAYK) is known. Similar to the pile driver of Patent Document 1, GAYK strikes the pile along the leader.

[0003] Since the support piles for the pedestal for installing solar power generation panels are usually made of metal, it is very important to take measures against the impact sound generated when driving them using a pile driver. Conventionally, as measures against the impact sound, for example, various soundproof covers have been proposed that are attached and used so as to surround the hammer part of the pile driver and the outer periphery of the upper end of the pile (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional soundproofing covers have room for improvement in terms of their effectiveness in reducing impact noise. After diligent research, the inventors discovered that the main source of impact noise is the vibration of the pile itself, and thus arrived at the subject of the present invention in order to suppress the vibration of the pile itself.

[0006] This invention has been made in view of the above circumstances, and aims to provide a vibration damping member and a method of using the vibration damping member that are suitable for reducing the impact noise generated when driving piles into the ground using a pile driver. [Means for solving the problem]

[0007] To achieve the above objective, firstly, the present invention provides a vibration damping member used by attaching it to a pile when driving a pile into the ground using a pile driver, wherein the pile has a first surface and a second surface arranged parallel to each other in a direction perpendicular to the longitudinal direction, and the vibration damping member satisfies at least one selected from the group consisting of (i) and (ii) below: (i) an external pressing portion that presses the first surface and the second surface of the pile from the outside, and (ii) an internal pressing portion that presses the first surface and the second surface of the pile from the inside (Invention 1).

[0008] According to this invention (Invention 1), when driving a pile into the ground using a pile driver, it is possible to reduce the impact noise generated due to the vibration of the pile itself.

[0009] In the above invention (Invention 1), in (i) above, it is preferable that the external pressing portion includes a first external pressing portion that presses the first surface from the outside of the pile and a second external pressing portion that presses the second surface from the outside of the pile, and in (ii) above, it is preferable that the internal pressing portion includes a first internal pressing portion that presses the first surface from the inside of the pile and a second internal pressing portion that presses the second surface from the inside of the pile (Invention 2).

[0010] According to the invention (Invention 2), in (i) above, the first surface of the pile can be pressed by the first external pressing part, and the second surface of the pile can be pressed by the second external pressing part. In (ii) above, the first surface of the pile can be pressed by the first internal pressing part, and the second surface of the pile can be pressed by the second internal pressing part. Therefore, vibration of the pile is easily suppressed.

[0011] In the above invention (Invention 2), it is preferable to further provide an external support portion in (i) above that can change the distance between the first external pressing portion and the second external pressing portion in a direction perpendicular to the longitudinal direction (Invention 3).

[0012] According to this invention (Invention 3), the distance between the first external pressing portion and the second external pressing portion can be changed by the external support portion, so that the first and second surfaces of the pile can be pressed according to the distance between the first and second surfaces of the pile.

[0013] In the above inventions (inventions 2 and 3), it is preferable to further provide an internal support portion in (ii) above that can change the distance between the first internal pressing portion and the second internal pressing portion in a direction perpendicular to the longitudinal direction (invention 4).

[0014] According to this invention (Invention 4), the distance between the first internal pressing portion and the second internal pressing portion can be changed by the internal support portion, so that the first and second surfaces of the pile can be pressed according to the distance between the first and second surfaces of the pile.

[0015] In the above invention (Invention 2-4), in (i) above, an elastic body may be provided in at least one selected from the group consisting of the first external pressing portion and the second external pressing portion, and in (ii) above, an elastic body may be provided in at least one selected from the group consisting of the first internal pressing portion and the second internal pressing portion (Invention 5).

[0016] According to such an invention (Invention 5), in the above (i), the adhesion with the first surface and / or the second surface of the pile can be improved. In the above (ii), the adhesion with the first surface and / or the second surface of the pile can be improved. Therefore, for example, since the vibration damping member is prevented from falling off the pile during work, the safety of the work is improved.

[0017] In the above invention (Inventions 1-5), in the above (i), the external pressing portion may be formed of metal or resin, and in the above (ii), the internal pressing portion may be formed of metal or resin (Invention 6).

[0018] Since metal or resin is a relatively hard and light material, according to such an invention (Invention 6), it is easy to ensure the rigidity and handleability of the vibration damping member.

[0019] In the above invention (Inventions 1-6), it is preferable that the vibration damping member is configured to be detachable from the pile (Invention 7).

[0020] According to such an invention (Invention 7), if necessary, for example, any number of vibration damping members can be attached to any position of the pile. Also, for example, the vibration damping member can be removed from the pile before the portion of the pile with the vibration damping member attached penetrates the ground.

[0021] In the above invention (Inventions 1-7), it is preferable that the pile is provided with an opening along the longitudinal direction (Invention 8).

[0022] The pile of such an invention (Invention 8) can be manufactured, for example, by deforming a plate-like member.

[0023] In the above invention (Inventions 1-8), it is preferable that the body mass of the pile driver is less than 3 tons (Invention 9).

[0024] The pile driver of such an invention (Invention 9) is a small-sized pile driver without an operator's driver's seat, so it is excellent in handleability.

[0025] Second, in order to achieve the above object, the present invention provides a method for using a vibration damping member of the above invention.In the method for using a vibration damping(Invention 1-9), at least one vibration damping member is attached along the longitudinal direction of the pile, the pile with the vibration damping member attached thereto is driven into the ground using a pile driver, and the vibration damping member is removed from the pile before the portion of the pile with the vibration damping member attached thereto penetrates into the ground(Invention 10).

[0026] According to such an invention(Invention 10), the vibration damping member can be removed from the pile before the portion of the pile with the vibration damping member attached thereto penetrates into the ground. Thereby, it is possible to reduce the impact sound generated due to the vibration of the pile itself when driving the pile into the ground using a pile driver.

[0027] In the above invention(Invention 10), it is preferable that the at least one vibration damping member includes a plurality of vibration damping members, and attaching the vibration damping members includes attaching a plurality of vibration damping members at intervals in the range of 0.5 m to 2.0 m along the longitudinal direction of the pile(Invention 11).

[0028] According to such an invention(Invention 11), a plurality of vibration damping members can be attached in a balanced manner along the longitudinal direction of the pile, so that the impact sound can be efficiently reduced.

Effect of the Invention

[0029] According to the vibration damping member and the method for using the vibration damping member according to the present invention, it is possible to reduce the impact sound generated due to the vibration of the pile itself when driving the pile into the ground using a pile driver.

Brief Description of the Drawings

[0030] [Figure 1A] It is a cross-sectional view showing an example of a vibration damping member according to an embodiment of the present invention. [Figure 1B] It is a cross-sectional view(a) and a front view(b) showing the vibration damping member of FIG. 1A together with a pile. [Figure 2A]This is a cross-sectional view showing another example of a vibration damping member according to one embodiment of the present invention. [Figure 2B] Figure 2A is a cross-sectional view showing the vibration damping member together with the pile. [Figure 3A] This is a cross-sectional view showing yet another example of a vibration damping member according to one embodiment of the present invention. [Figure 3B] Figure 3A shows the damping member together with the piles in a cross-sectional view (a), a front view (b), and a side view (c). [Figure 4A] This is a front view showing an example of a pile with multiple vibration damping members attached along its longitudinal direction. [Figure 4B] Figure 4A is a front view showing the pile together with the pile driver. [Figure 5] This is a cross-sectional view showing an example of a pile to which a vibration damping member is attached. [Figure 6] These are front view (a) and side view (b) of a pile driver, an example of a pile driver used when driving piles into the ground, along with the pile itself. [Modes for carrying out the invention]

[0031] Hereinafter, embodiments of the vibration damping member according to the present invention will be described with reference to the drawings as appropriate. The embodiments described below are provided to facilitate understanding of the present invention and do not limit the present invention in any way.

[0032] [Vibration damping material] The vibration damping member according to the present invention is used by attaching it to a pile when driving a pile into the ground. Here, the pile has a first surface and a second surface arranged parallel to each other in a direction perpendicular to the longitudinal direction. The vibration damping member according to the present invention satisfies at least one selected from the group consisting of (i) and (ii) below. (i) It is equipped with an external pressing part that presses the first and second surfaces of the pile from the outside. (ii) It is equipped with an internal pressing section that presses the first and second surfaces of the pile from the inside.

[0033] Figure 5 is a cross-sectional view showing an example of a pile 90 to which a vibration damping member according to the present invention is attached. The pile 90 is an elongated member, and is typically a support pile for a mounting frame for solar power generation panels. As described above, the pile 90 has a first surface 91 and a second surface 92 arranged parallel to each other in a direction perpendicular to the longitudinal direction. The pile 90 further has a third surface 93 connecting the first surface 91 and the second surface 92. The third surface 93 is a surface that is not parallel to the first surface 91 and the second surface 92. Typically, the third surface 93 is a surface perpendicular to the first surface 91 and the second surface 92.

[0034] In this embodiment, the pile 90 is provided with an opening 95 along its longitudinal direction. In other words, the pile 90 is provided with an opening 95 positioned parallel to the third surface 93. The opening 95 communicates with the outside. That is, in this embodiment, the pile 90 is a non-cylindrical member that does not have a closed space. Among such piles 90, the piles 90 shown in Figures 5(a), (b), and (c) can be manufactured, for example, by deforming a single plate-shaped member. The pile 90 shown in Figure 5(d) can be manufactured, for example, by forming three plate-shaped members into a long shape while automatically welding them together.

[0035] As shown in Figure 5(a), the pile 90 may have a first extension 911 connected to the first surface 91 and extending away from the opening 95, and a second extension 921 connected to the second surface 92 and extending away from the opening 95. A pile 90 like the one shown in Figure 5(a) is sometimes called a hat-shaped pile. As shown in Figure 5(b), the pile 90 may have a first extension 912 connected to the first surface 91 and extending towards the opening 95, and a second extension 922 connected to the second surface 92 and extending towards the opening 95. A pile 90 like the one shown in Figure 5(b) is sometimes called a lip-channel type or C-shaped pile. As shown in Figure 5(c), the pile 90 does not have to have a first extension extending from the first surface 91 and a second extension extending from the second surface 92. A pile 90 like the one shown in Figure 5(c) is sometimes called a channel type or channel pile. As shown in Figure 5(d), the pile 90 may have a third surface 93 connecting the central part of the first surface 91 and the central part of the second surface 92, and may have two openings 95a and 95b provided along the longitudinal direction. A pile 90 like the one shown in Figure 5(d) is sometimes called an H-shape. The vibration damping member according to the present invention can be applied to any of the piles 90 shown in Figures 5(a) to (d).

[0036] Figure 6 shows a front view (a) and a side view (b) of an example of a pile driver 80 used when driving piles 90 into the ground, along with the piles 90. In this embodiment, it is preferable that the mass of the pile driver 80 is less than 3 tons. Such a pile driver 80 is a small pile driver without an operator's seat, and therefore offers excellent handling.

[0037] The pile driver 80 is equipped with an operating lever (not shown) that can be operated by an operator from outside the machine. The main body 81 of the pile driver 80 is equipped with a jack 83a for tilting the leader 82 forward and backward, a jack 83b for tilting the leader 82 left and right, and a jack 84 for raising and lowering the leader 82. After moving to the pile driving site with the crawler 85, the verticality and height of the leader 82 are adjusted by operating the jacks 83a, 83b, and 84. The leader 82 is provided with a bracket 87 that slides up and down driven by a chain 86, and the bracket 87 is equipped with a hydraulic hammer 87a, a mold 87b, and a piston rod 87c.

[0038] Next, a method for driving a pile 90 into the ground using the pile driver 80 shown in Figure 6 will be described. The pile 90 is typically a support pile for a mounting frame for solar power generation panels. A support pile for a mounting frame for solar power generation panels is a pile used for driving into the ground, and usually has a maximum length of about 6m and a width of about 100-150mm. The mold 87b of the pile driver 80 is provided with a groove that matches the cross-sectional shape of the pile 90 to be used. The pile 90 is raised, and with the pile center aligned with the center of the mold 87b, the bracket 87 is lowered by driving the chain 86, and the upper end of the pile 90 is fitted into the groove of the mold 87b. When the hydraulic hammer 87a is driven while a pushing force is applied to the pile 90 by driving the chain 86, the piston rod 87c strikes the mold 87b, and the impact force is transmitted to the pile 90 via the mold 87b, causing the pile 90 to penetrate into the ground.

[0039] Figure 1A is a cross-sectional view showing an example of a vibration damping member 100 according to one embodiment of the present invention. Figure 1B is a cross-sectional view (a) and a front view (b) showing the vibration damping member 100 of Figure 1A together with a pile 90.

[0040] The vibration damping member 100 in Figure 1A satisfies (i) above. That is, the vibration damping member 100 includes an external pressing part 10 that presses the first surface 91 and the second surface 92 of the pile 90 from the outside. With the vibration damping member 100, the vibration of the pile 90 can be suppressed by pressing the first surface 91 and the second surface 92 of the pile 90 with the external pressing part 10. As a result, the impact noise generated due to the vibration of the pile 90 itself when driving the pile 90 into the ground using a pile driver can be reduced.

[0041] It is preferable that the vibration damping member 100 is configured to be detachably attached to the pile 90. With such a configuration, any number of vibration damping members 100 can be attached to any position on the pile 90 as needed. Also, for example, the vibration damping member 100 can be removed from the pile 90 before the portion of the pile 90 to which the vibration damping member 100 is attached penetrates the ground.

[0042] As shown in Figures 1A and 1B, in the vibration damping member 100, it is preferable that the external pressing portion 10 includes a first external pressing portion 11 that presses the first surface 91 of the pile 90 from the outside and a second external pressing portion 12 that presses the second surface 92 of the pile 90 from the outside. With this configuration, the first external pressing portion 11 can press the first surface 91 of the pile 90 and the second external pressing portion 12 can press the second surface 92 of the pile 90, making it easier to suppress vibrations of the pile 90.

[0043] As shown in Figures 1A and 1B, the first external pressing portion 11 may have a planar shape so as to contact the outer surface of the first surface 91 of the pile 90. The second external pressing portion 12 may have a planar shape so as to contact the outer surface of the second surface 92 of the pile 90.

[0044] As shown in Figures 1A and 1B, it is preferable that the vibration damping member 100 further comprises an external support portion 20 that can change the distance L100 between the first external pressing portion 11 and the second external pressing portion 12 in a direction perpendicular to the longitudinal direction. With such a configuration, the distance L100 can be changed by the external support portion 20, so that the first surface 91 and the second surface 92 of the pile 90 can be pressed according to the distance L90 between the first surface 91 and the second surface 92 of the pile 90.

[0045] The structure of the external support portion 20 is not particularly limited, as long as the distance L100 between the first external pressing portion 11 and the second external pressing portion 12 can be changed. For example, as shown in Figure 1A, the external support portion 20 may have an arm portion 21 and a movable support portion 22. One end of the arm portion 21 is connected to the first external pressing portion 11, and the other end of the arm portion 21 is connected to the movable support portion 22 by a screw structure. The movable support portion 22 is connected to the second external pressing portion 12. The distance L100 between the first external pressing portion 11 and the second external pressing portion 12 can be changed by adjusting the degree of threading of the movable support portion 22 with respect to the other end of the arm portion 21. An adjustment rod 23 for adjusting the degree of threading of the movable support portion 22 may be provided at the end of the movable support portion 22. The degree of threading of the movable support portion 22 can be easily adjusted by rotating the adjustment rod 23 relative to the movable support portion 22.

[0046] Although not shown in the diagram, the vibration damping member 100 may have an elastic body on at least one of the group consisting of a first external pressing portion 11 and a second external pressing portion 12. With such a configuration, the adhesion with the first surface 91 and / or second surface 92 of the pile 90 can be improved. As a result, for example, the likelihood of the vibration damping member 100 falling off the pile 90 during work is suppressed, thereby improving safety during work.

[0047] Elastic bodies may be provided on both the first external pressing portion 11 and the second external pressing portion 12. The elastic body may be provided, for example, to cover the surface of the first external pressing portion 11. The elastic body may be provided, for example, to cover the surface of the second external pressing portion 12.

[0048] Examples of elastic materials include flat rubber sheets.

[0049] The external pressing portion 10 may be formed of, for example, metal or resin. Since metal or resin is a relatively hard and light material, it is easy to ensure the rigidity and handling of the vibration damping member 100. The material forming the first external pressing portion 11 and the material forming the second external pressing portion 12 may be the same or different.

[0050] Figure 2A is a cross-sectional view showing another example of the vibration damping member 100 according to one embodiment of the present invention. Figure 2B is a cross-sectional view showing the vibration damping member 101 of Figure 2A together with the pile 90. In the following, elements common to the vibration damping member 100 described above will be given the same reference numerals, and their descriptions may be omitted.

[0051] The vibration damping member 101 in Figure 2A satisfies (ii) above. That is, the vibration damping member 101 includes an internal pressing part 30 that presses the first surface 91 and the second surface 92 of the pile 90 from the inside. With the vibration damping member 101, the vibration of the pile 90 can be suppressed by pressing the first surface 91 and the second surface 92 of the pile 90 with the internal pressing part 30. As a result, the impact noise generated due to the vibration of the pile 90 itself when driving the pile 90 into the ground using a pile driver can be reduced.

[0052] As shown in Figures 2A and 2B, in the vibration damping member 101, the internal pressing portion 30 may include a first internal pressing portion 31 that presses the first surface 91 of the pile 90 from the inside and a second internal pressing portion 32 that presses the second surface 92 of the pile 90 from the inside. With such a configuration, the first internal pressing portion 31 can press the first surface 91 of the pile 90 and the second internal pressing portion 32 can press the second surface 92 of the pile 90, making it easier to suppress vibrations of the pile 90.

[0053] As shown in Figures 2A and 2B, the first internal pressing portion 31 may have a planar shape so as to contact the inner surface of the first surface 91 of the pile 90. The second internal pressing portion 32 may have a planar shape so as to contact the inner surface of the second surface 92 of the pile 90.

[0054] As shown in Figures 2A and 2B, it is preferable that the vibration damping member 101 further comprises an internal support portion 40 that can change the distance L101 between the first internal pressing portion 31 and the second internal pressing portion 32 in a direction perpendicular to the longitudinal direction. With such a configuration, the distance L101 can be changed by the internal support portion 40, so that the first surface 91 and the second surface 92 of the pile 90 can be pressed according to the distance L90 between the first surface 91 and the second surface 92 of the pile 90.

[0055] The internal support portion 40 is not particularly limited in structure, as long as the distance L101 between the first internal pressing portion 31 and the second internal pressing portion 32 can be changed. For example, as shown in Figure 2A, the internal support portion 40 may have a movable support portion 41, one end of which is connected to the first internal pressing portion 31 by a screw structure and the other end of which is connected to the second internal pressing portion 32. The distance L101 between the first internal pressing portion 31 and the second internal pressing portion 32 can be changed by adjusting the degree of threading of the movable support portion 41 with respect to the first internal pressing portion 31. The movable support portion 41 may be provided with an adjustment rod 43 for adjusting the degree of threading of the movable support portion 41. By rotating the adjustment rod 43, the degree of threading of the movable support portion 41 with respect to the first internal pressing portion 31 can be easily adjusted.

[0056] Although not shown in the diagram, the vibration damping member 101 may have an elastic body in at least one of the group consisting of a first internal pressing portion 31 and a second internal pressing portion 32. With such a configuration, the adhesion with the first surface 91 and / or second surface 92 of the pile 90 can be improved. As a result, for example, the detachment of the vibration damping member 101 from the pile 90 during work is suppressed, thereby improving safety during work.

[0057] Elastic bodies may be provided in both the first internal pressing portion 31 and the second internal pressing portion 32. The elastic body may be provided, for example, to cover the surface of the first internal pressing portion 31. The elastic body may be provided, for example, to cover the surface of the second internal pressing portion 32.

[0058] As mentioned above, an example of an elastic body is a flat sheet of rubber.

[0059] The internal pressing portion 30 may be formed of, for example, metal or resin. Since metal or resin is a relatively hard and light material, it is easy to ensure the rigidity and handling of the vibration damping member 101. The material forming the first internal pressing portion 31 and the material forming the second internal pressing portion 32 may be the same or different.

[0060] Figure 3A is a cross-sectional view showing yet another example of the vibration damping member 100 according to one embodiment of the present invention. Figure 3B is a cross-sectional view (a), a front view (b), and a side view (c) showing the vibration damping member 102 of Figure 3A together with the pile 90. In the following, elements common to the vibration damping members 100 and 101 described above will be given the same reference numerals, and their descriptions may be omitted.

[0061] The vibration damping member 102 in Figure 3A satisfies (i) and (ii) above. That is, the vibration damping member 102 includes an external pressing part 10 that presses the first surface 91 and the second surface 92 of the pile 90 from the outside, and an internal pressing part 30 that presses the first surface 91 and the second surface 92 of the pile 90 from the inside. With the vibration damping member 102, the vibration of the pile 90 can be suppressed by pressing the first surface 91 and the second surface 92 of the pile 90 with the external pressing part 10 and the internal pressing part 30. As a result, the impact noise generated due to the vibration of the pile 90 itself when driving the pile 90 into the ground using a pile driver can be reduced.

[0062] As shown in Figures 3A and 3B, in the vibration damping member 102, the external pressing portion 10 may indirectly press the first surface 91 and the second surface 92. For example, if the pile 90 is hat-shaped as shown in Figure 5(a), as shown in Figure 3B, the external pressing portion 10 may indirectly press the first surface 91 and the second surface 92 by pressing the end face of the first extension portion 911 and the end face of the second extension portion 921 of the pile 90.

[0063] As shown in Figures 3A and 3B, in the vibration damping member 102, it is preferable that the external pressing portion 10 includes a first external pressing portion 11 that presses the first surface 91 of the pile 90 from the outside and a second external pressing portion 12 that presses the second surface 92 of the pile 90 from the outside. With this configuration, the first external pressing portion 11 can press the first surface 91 of the pile 90 and the second external pressing portion 12 can press the second surface 92 of the pile 90, making it easier to suppress vibrations of the pile 90.

[0064] The first external pressing portion 11 may have a planar shape so as to contact the outer surface of the first surface 91 of the pile 90. The second external pressing portion 12 may have a planar shape so as to contact the outer surface of the second surface 92 of the pile 90. If the pile 90 is hat-shaped as shown in Figure 5(a), the first external pressing portion 11 may have a concave shape so as to engage with the first extension portion 911 of the pile 90, as shown in Figures 3A and 3B. The second external pressing portion 12 may have a concave shape so as to engage with the second extension portion 921 of the pile 90.

[0065] As shown in Figures 3A and 3B, it is preferable that the vibration damping member 102 further comprises an external support portion 20 that can change the distance L102a between the first external pressing portion 11 and the second external pressing portion 12 in a direction perpendicular to the longitudinal direction. With such a configuration, the distance L102a can be changed by the external support portion 20, so that the first surface 91 and the second surface 92 of the pile 90 can be pressed according to the distance L90 between the first surface 91 and the second surface 92 of the pile 90.

[0066] The structure of the external support portion 20 is not particularly limited, as long as the distance L102a between the first external pressing portion 11 and the second external pressing portion 12 can be changed. For example, as shown in Figure 3A, the external support portion 20 may have a movable support portion 25, one end of which is connected to the first external pressing portion 11 and the other end of which is connected to the second external pressing portion 12 by a screw structure. The distance L102a between the first external pressing portion 11 and the second external pressing portion 12 can be changed by adjusting the degree of screwing of the second external pressing portion 12 to the movable support portion 25.

[0067] As shown in Figures 3A and 3B, in the vibration damping member 102, it is preferable that the internal pressing portion 30 includes a first internal pressing portion 31 that presses the first surface 91 of the pile 90 from the inside and a second internal pressing portion 32 that presses the second surface 92 of the pile 90 from the inside. With this configuration, the first internal pressing portion 31 can press the first surface 91 of the pile 90 and the second internal pressing portion 32 can press the second surface 92 of the pile 90, making it easier to suppress vibrations of the pile 90.

[0068] As shown in Figures 3A and 3B, the first internal pressing portion 31 may have a planar shape so as to contact the inner surface of the first surface 91 of the pile 90. The second internal pressing portion 32 may have a planar shape so as to contact the inner surface of the second surface 92 of the pile 90.

[0069] Although not shown in the figures, the vibration damping member 102 may further include an internal support portion 40 that can change the distance L102b between the first internal pressing portion 31 and the second internal pressing portion 32 in a direction perpendicular to the longitudinal direction. With such a configuration, the distance L102b can be changed by the internal support portion 40, so that the first surface 91 and the second surface 92 of the pile 90 can be pressed according to the distance L90 between the first surface 91 and the second surface 92 of the pile 90.

[0070] [How to use vibration damping materials] Next, a method for using the vibration damping member according to the present invention described above will be explained. The method for using the vibration damping member according to the present invention includes attaching at least one vibration damping member along the longitudinal direction of a pile, driving the pile with the vibration damping member attached into the ground using a pile driver, and removing the vibration damping member from the pile before the portion of the pile with the vibration damping member attached penetrates the ground.

[0071] According to this method of use, the vibration damping member can be removed from the pile before the portion of the pile to which the damping member is attached penetrates the ground. This reduces the impact noise generated by the vibration of the pile itself when driving the pile into the ground using a pile driver.

[0072] At least one vibration damping member may include multiple vibration damping members. In this case, it is preferable that the installation of at least one vibration damping member includes installing multiple vibration damping members along the longitudinal direction of the pile at intervals ranging from 0.5 m to 2.0 m. With such a configuration, multiple vibration damping members can be installed in a balanced manner along the longitudinal direction of the pile, thereby efficiently reducing impact noise.

[0073] Figure 4A is a front view showing an example of a pile 90 with multiple vibration damping members 100 attached along its longitudinal direction. Figure 4B is a front view showing the pile 90 from Figure 4A together with a pile driving machine 80. In Figure 4A, an example is shown in which the vibration damping member 100 from Figure 1A is used as the vibration damping member according to the present invention, but the vibration damping member 101 from Figure 2A or the vibration damping member 102 from Figure 3A may also be used as the vibration damping member according to the present invention.

[0074] According to this method of use, the vibration damping members can be removed from the pile sequentially before the portion of the pile to which the damping members are attached penetrates the ground. This makes it possible to efficiently reduce the impact noise generated by the vibration of the pile itself when driving the pile into the ground using a pile driver.

[0075] The embodiments described above are provided to facilitate understanding of the present invention and are not intended to limit it. Accordingly, each element disclosed in the above embodiments is intended to include all design modifications and equivalents that fall within the technical scope of the present invention. [Industrial applicability]

[0076] The vibration damping member and method of using the vibration damping member according to the present invention are effective in reducing the impact noise generated when driving support piles for solar power generation panels into the ground using a pile driver. [Explanation of Symbols]

[0077] 100, 101, 102 Vibration damping members 10 External pressing part 11 First external pressing part 12 Second external pressing section 20 External support part 21 Arm section 22 Moving support part 23 Adjustment rod 25 Moving support part 30 Internal pressing part 31 First internal pressing section 32 Second internal pressing section 40 Internal support part 41 Moving support part 43 Adjustment rod 80 Pile driver 81 Main body of the aircraft 82 Leaders 83a Jack 83b Jack 84 Jack 85 Crawler 86 chain 87 Bracket 87a Hydraulic Hammer 87b Mold 87c Piston Rod 90 stakes 91 Page 1 92 Side 2 93 Page 3 95 Opening 95a opening 95b opening

Claims

1. A vibration damping member used when driving a pile into the ground using a pile driver, which is attached to the pile, The pile has a first surface and a second surface that are arranged parallel to each other in a direction perpendicular to the longitudinal direction, The vibration damping member satisfies at least one selected from the group consisting of (i) and (ii) below, (i) The pile is provided with an external pressing part that presses the first and second surfaces of the pile from the outside, (ii) The pile is provided with an internal pressing section that presses the first and second surfaces of the pile from the inside, Vibration damping material.

2. In (i) above, the external pressing portion includes a first external pressing portion that presses the first surface from the outside of the pile and a second external pressing portion that presses the second surface from the outside of the pile. In (ii) above, the internal pressing portion includes a first internal pressing portion that presses the first surface from the inside of the pile and a second internal pressing portion that presses the second surface from the inside of the pile. The vibration damping member according to claim 1.

3. The above (i) further comprises an external support portion that can change the distance between the first external pressing portion and the second external pressing portion in a direction perpendicular to the longitudinal direction, The vibration damping member according to claim 2.

4. The above (ii) further comprises an internal support portion that can change the distance between the first internal pressing portion and the second internal pressing portion in a direction perpendicular to the longitudinal direction, The vibration damping member according to claim 2.

5. In (i) above, an elastic body is provided in at least one selected from the group consisting of the first external pressing portion and the second external pressing portion. In (ii) above, an elastic body is provided in at least one selected from the group consisting of the first internal pressing portion and the second internal pressing portion. The vibration damping member according to claim 2.

6. In (i) above, the external pressing portion is formed of metal or resin, In (ii) above, the internal pressing portion is made of metal or resin. The vibration damping member according to claim 1.

7. The vibration damping member is configured to be detachably attached to the pile. The vibration damping member according to claim 1.

8. The aforementioned pile is provided with an opening along the longitudinal direction. The vibration damping member according to claim 1.

9. The pile driver has a body mass of less than 3 tons. The vibration damping member according to claim 1.

10. A method for using a vibration damping member according to any one of claims 1 to 9, At least one of the vibration damping members is attached along the longitudinal direction of the pile, The piles to which the vibration damping members are attached are driven into the ground using the pile driving machine, The vibration damping member is removed from the pile before the portion of the pile to which the vibration damping member is attached penetrates the ground. Method of using vibration damping materials, including the method described above.

11. The at least one vibration damping member includes a plurality of vibration damping members, The installation of the vibration damping members includes installing a plurality of the vibration damping members along the longitudinal direction of the pile at intervals ranging from 0.5 m to 2.0 m. A method for using the vibration damping member according to claim 10.

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