WO2022075009A1 - Matériau réducteur de vibrations - Google Patents

Matériau réducteur de vibrations Download PDF

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Publication number
WO2022075009A1
WO2022075009A1 PCT/JP2021/033497 JP2021033497W WO2022075009A1 WO 2022075009 A1 WO2022075009 A1 WO 2022075009A1 JP 2021033497 W JP2021033497 W JP 2021033497W WO 2022075009 A1 WO2022075009 A1 WO 2022075009A1
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WO
WIPO (PCT)
Prior art keywords
vibration
mesh sheet
sheet
floor plate
reducing material
Prior art date
Application number
PCT/JP2021/033497
Other languages
English (en)
Japanese (ja)
Inventor
正貴 青山
淳市 弘中
亮太 小川
英基 永谷
一成 佐藤
詩瑶 中本
Original Assignee
三井化学産資株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三井化学産資株式会社 filed Critical 三井化学産資株式会社
Publication of WO2022075009A1 publication Critical patent/WO2022075009A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems

Definitions

  • the present invention relates to a vibration reducing material and a vibration reducing method for reducing vibration when a heavy machine such as a crawler crane or a hydraulic excavator travels.
  • Patent Document 1 discloses a vibration reducing material for reducing vibration when a heavy machine travels at a construction site or the like.
  • This vibration reducing material is composed of an open cell polyurethane foam which is a thermosetting resin and a floor plate placed on the open cell polyurethane foam.
  • the vibration when the heavy machine runs on the floor plate is absorbed by the open cell polyurethane foam.
  • the subject of the present invention made in view of the above facts is a vibration reducing material and a vibration reducing method capable of effectively reducing vibration when a heavy machine travels and allowing the heavy machine to travel stably. To provide.
  • the following vibration reducing material that solves the above problems is provided. That is, it is a vibration reducing material for reducing vibration when a heavy machine travels, and includes a floor plate on which the heavy equipment travels on the upper surface and a synthetic resin mesh sheet arranged below the floor plate.
  • the sheet has a plurality of upper contact portions that come into contact with the lower surface of the floor plate and a plurality of lower contact portions that come into contact with the surface on which the mesh sheet is installed.
  • a vibration reducing material is provided in which the lower contact portion does not exist immediately below at least a part of the plurality of upper contact portions.
  • the reticulated sheet includes a plurality of upper streaks and a plurality of lower streaks located below the plurality of upper streaks.
  • the upper muscle and the lower muscle are formed in a sinusoidal shape extending in a predetermined direction in different phases, and it is preferable that each of the upper muscles is connected to three or more of the lower muscles.
  • the net-like sheet has an inclined portion inclined from the upper contact portion toward the lower contact portion. It is convenient that the reticulated sheet is made of an elastomer. It is preferable that the additional floor plate is arranged below the net-like sheet.
  • the following vibration reduction method for solving the above problems is provided. That is, it is a vibration reduction method for reducing vibration when a heavy machine travels, and a process of installing a floor plate on which the heavy equipment travels on the upper surface and a synthetic resin mesh sheet arranged below the floor plate are installed.
  • the mesh sheet has a plurality of upper contact portions in contact with the lower surface of the floor plate and a plurality of lower contact portions in contact with the surface on which the mesh sheet is installed.
  • a vibration reducing method in which the lower contact portion does not exist directly under at least a part of the plurality of upper contact portions in a state where the lower contact portion is not deformed.
  • the load applied to the mesh sheet from the upper contact portion is applied in the horizontal direction.
  • the mesh sheet can be made thin, the amount of deformation of the mesh sheet when the heavy machine travels is small, and the heavy machine can travel stably.
  • the side view of the vibration reducing material configured according to this invention is a sectional view taken along line EE in FIG. 2.
  • a graph showing the vibration level when the crawler crane is running (b) a graph showing the vibration level when the hydraulic excavator is running, and (c) a graph showing the vibration level when the vibration roller is running.
  • the vibration reducing material 2 includes a floor plate 6 on which a heavy machine 4 such as a hydraulic excavator runs on the upper surface, and a synthetic resin mesh sheet 8 arranged below the floor plate 6.
  • a heavy machine 4 such as a hydraulic excavator runs on the upper surface
  • a synthetic resin mesh sheet 8 arranged below the floor plate 6.
  • one mesh sheet 8 is installed on the ground, but an additional floor plate (for example, the same plate as the floor plate 6) may be installed between the mesh sheet 8 and the ground. ..
  • an additional floor plate for example, the same plate as the floor plate 6
  • two or more mesh sheets 8 may be laminated between the floor plate 6 and the ground.
  • the floor plate 6 can be formed of an appropriate metal material such as a rectangular steel plate.
  • the net-like sheet 8 absorbs vibration when the heavy machine 4 travels on the upper surface of the floor plate 6.
  • the dimensions of the mesh sheet 8 that can be formed into a rectangular shape may be, for example, about 1 to 2 m in width, about 10 m in length, and about 10 mm in thickness.
  • the reticulated sheet 8 can be formed from various synthetic resins.
  • the synthetic resin for the mesh sheet 8 may be either a thermoplastic resin (for example, an olefin resin, a silicon resin, etc.) or a thermosetting resin (for example, a urethane resin, an imide resin, etc.).
  • the net-like sheet 8 is formed from an elastomer having rubber elasticity from the viewpoint of the vibration reducing effect. Further, when the net-like sheet 8 is formed from an elastomer having rubber elasticity, it can be easily cut with scissors or the like, so that it can be easily adjusted to a required size and has a strip-like net-like shape.
  • the sheet 8 can be easily wound into a cylindrical shape, and the net-like sheet 8 can be easily transported, installed, removed, and housed.
  • the mesh sheet 8 of the illustrated embodiment has a two-stage structure including a plurality of upper streaks 10 and a plurality of lower streaks 12 located below the plurality of upper streaks 10. Is.
  • the upper streaks 10 and the lower streaks 12 are formed in a sinusoidal shape extending in a predetermined direction in different phases.
  • each upper stage is shown.
  • the maximum waveform value (maximum value in the Y-axis direction) of the streak 10 is located at each point of ..., X 2 , X 4 , ..., And the maximum waveform value (maximum value in the Y-axis direction) of each lower streak 12 is ..., X 1 , X3 , ...,
  • Each upper bar 10 and each lower bar 12 are formed in a sinusoidal shape extending in the X-axis direction in different phases from each other.
  • the amplitude A1 of the upper streak 10 and the amplitude A2 of the lower streak 12 may be the same or different.
  • each of the upper muscles 10 in the illustrated embodiment is connected to three of the lower muscles 12, each upper muscle 10 may be connected to four or more of the lower muscles 12.
  • the mesh sheet 8 has a plurality of upper contact portions that come into contact with the lower surface of the floor plate 6, and a plurality of lower contact portions that come into contact with the installation surface (ground or the upper surface of an appropriate plate) on which the mesh sheet 8 is installed. It is important that the lower contact portion does not exist directly under at least a part of the plurality of upper contact portions in the state where the mesh sheet 8 is not deformed.
  • the upper contact portion and the lower contact portion of the mesh sheet 8 are an upper end portion and a lower end portion of the mesh sheet 8 in a state where the mesh sheet 8 is not deformed, respectively.
  • the mesh sheet 8 is made of synthetic resin, and the mesh sheet 8 may be deformed when a heavy machine runs on the vibration reducing material 2 or when the floor plate 6 is placed on the mesh sheet 8, which is shown in the figure.
  • the lower contact portion does not exist directly under at least a part of the upper contact portion in a state where the mesh sheet 8 is not deformed due to the running of heavy machinery or the like.
  • the net-like sheet 8 When the net-like sheet 8 is deformed, the lower contact portion may be present immediately below the upper contact portion.
  • each upper bar 10 has a plurality of upper contact portions 10a, 10b, 10c, 10d, 10e, which are in contact with the lower surface of the floor plate 6.
  • Each lower bar 12 has a plurality of lower contact portions 12a, 12b, 12c, 12d, 12e, ...
  • the upper contact portions 10a to 10e and the lower contact portions 12a to 12e are a part of the upper contact portion and the lower contact portion of the mesh sheet 8, and the upper contact portion and the lower contact portion of the mesh sheet 8 are these. Not limited to.
  • each upper bar 10 and each lower bar 12 is rectangular, and each upper bar 10 and each lower bar 12 has a rectangular shape. It's twisted.
  • the mesh sheet 8 has a one-sided inclined portion 14 that inclines laterally to one side (left side in FIG. 3) from the upper contact portion 10a toward the lower contact portion 12a, and the upper contact portion 10e toward the lower contact portion 12e. It has another side inclined portion 16 which is inclined to the other side in the lateral direction (right side in FIG. 3).
  • the mesh sheet 8 of the illustrated embodiment has the one-side inclined portion 14 and the other-side inclined portion 16, the lower contact portions 12a and 12e are present immediately below the upper contact portions 10a and 10e. It is designed not to.
  • the lower streak 12 is not located directly under the upper streak 10, and the lower contact portion is directly under the upper contact portions 10b and 10d. 12b and 12d do not exist. Further, in the end surface shown in FIG. 3C, the lower streak 12 is located directly under the upper streak 10, but the position of the upper contact portion 10c and the position of the lower contact portion 12c are slightly deviated. The lower contact portion 12c does not exist directly below the upper contact portion 10c.
  • the lower contact portions 12a to 12e do not exist directly under the upper contact portions 10a to 10e of the mesh sheet 8, so that the upper contact portions 10a to 10e are reticulated.
  • the vibration reducing material 2 since the mesh sheet 8 can be made thin, the amount of deformation of the mesh sheet 8 when the heavy machine 4 travels is small, and the heavy machine 4 can travel stably.
  • the reticulated sheet 8 of the above-described embodiment has a two-stage structure having an upper streak 10 and a lower streak 12, but the reticulated sheet of the present invention may have a single-stage structure.
  • the upper bar 10 and the lower bar 12 of the mesh sheet 8 may have a form other than the sinusoidal shape.
  • the mesh sheet of the present invention for example, the upper and lower bars extending straight may intersect each other to form a mesh, and in this case, the mesh shape of the upper and lower bars is rectangular, rhombic, and hexagonal. Any shape such as can be adopted.
  • Example 1 is a mesh sheet having a thickness of 10 mm manufactured by using an olefin-based thermoplastic elastomer in the shapes as shown in FIGS. 2 and 3, and Comparative Example 1 is manufactured by using the same material as that of Example 1. It is a non-perforated sheet with a thickness of 10 mm.
  • Example 2 is a mesh sheet having a thickness of 10 mm manufactured by using an olefin-based thermoplastic elastomer softer than that of Example 1 and having a shape as shown in FIGS. 2 and 3 (the same shape as that of Example 1), and is compared.
  • Example 2 is a non-perforated sheet having a thickness of 10 mm manufactured using the same material as in Example 2.
  • the loss tangent tan ⁇ was measured by a measuring method based on JIS K 6394: 2007.
  • the loss tangent tan ⁇ is one index showing the vibration reduction effect, and it is considered that the larger the value of the loss tangent tan ⁇ , the higher the vibration reduction effect.
  • the test temperature when the loss tangent tan ⁇ was measured was 23 ° C.
  • the measurement frequency was 1 to 100 Hz
  • the static load was 150 kPa.
  • the loss tangent tan ⁇ of Example 1 is 0.14 to 0.16, and the loss tangent tan ⁇ of Comparative Example 1 is 0.08 to 0.11.
  • the value of the loss tangent tan ⁇ was larger in.
  • the loss tangent tan ⁇ of Example 2 is 0.14 to 0.16, and the loss tangent tan ⁇ of Comparative Example 2 is 0.11 to 0.14, and the loss of Example 2 is higher than that of Comparative Example 2.
  • the value of tangent tan ⁇ was large. Therefore, it can be said that the net-like sheet manufactured with the shapes shown in FIGS. 2 and 3 has a higher vibration reducing effect than the non-perforated sheet manufactured with the same material.
  • Example 1 When the hardness of Examples 1 and 2 was measured, as shown in FIG. 4, the material of Example 1 had a hardness of 90 (durometer A), and the material of Example 2 had a hardness of 53 (durometer A). Met. Moreover, when the strain rate of Examples 1 and 2 when a static load of 150 kPa was applied was measured, it was 16% in Example 1 and 50% in Example 2.
  • Example 1 is laid between the unpaved ground and the steel floor plate, the vibration level when the heavy machine runs on the upper surface of the floor plate is measured, and the mesh sheet is not removed.
  • FIG. 5A shows the vibration level when a 4.9-ton class (lifting capacity) crawler crane with a synthetic rubber pad attached to the crawler travels
  • FIG. 5B shows the vibration level.
  • the vibration level when a 0.25 m 3 class (bucket capacity) hydraulic excavator with a synthetic rubber pad attached to the crawler runs is shown.
  • FIG. 5 (c) shows the 4 ton class (airframe mass).
  • the vibration level when the vibration roller is running is shown.
  • FIGS. 5A to 5C the vibration level when the mesh sheet of Example 1 is laid (with the mesh sheet) is shown by a solid line, and when the mesh sheet is removed (without the mesh sheet). ) Vibration level is shown by the dotted line.
  • FIG. 6 shows the maximum value of the solid line in FIGS. 5A to 5C (the maximum value of the vibration level when the mesh sheet of Example 1 is laid (with the mesh sheet)) and FIG. 5 (a). ) To the maximum value of the dotted line in FIG. 5 (c) (the maximum value of the vibration level when the reticulated sheet of Example 1 is removed (without the reticulated sheet)) and the difference between the respective maximum values are shown.
  • the maximum vibration level of the 4.9-ton class crawler crane during travel is reduced by 6 dB
  • the maximum vibration level of the 0.25 m3 class hydraulic excavator during travel is reduced.
  • the value was reduced by 14 dB
  • the maximum value of the vibration level during running of the 4-ton class vibration roller was reduced by 20 dB.
  • a construction step of creating a ground on which the vibration reducing material 2 is installed is carried out.
  • the ground on which the vibration reducing material 2 is installed is smoothly molded, or crushed stone or the like is spread and leveled.
  • the net-like sheet installation process of installing the net-like sheet 8 on the created ground is carried out.
  • the mesh sheet installation step first, the mesh sheet 8 wound in a cylindrical shape and packed is unloaded to the ground near the installation position. Next, the net-like sheet 8 wound in a cylindrical shape is manually unfolded. In this case, it is preferable to fix the mesh sheet 8 to the ground with an anchor or the like as necessary to prevent the mesh sheet 8 from slipping. Further, in order to prevent the mesh sheets 8 from being displaced from each other, the mesh sheets 8 may be fixed to each other by welding, adhesion or the like, if necessary.
  • the floor plate installation process After carrying out the net-like sheet installation process, carry out the floor plate installation process of installing the floor plate 6 on the net-like sheet 8 installed on the ground.
  • a hook (not shown) is provided on the floor plate 6, the floor plate 6 is suspended by a lifting machine such as a crane, and the floor plate 6 is installed on the mesh sheet 8 installed on the ground.
  • the vibration reducing material 2 can be constructed by these net-like sheet installation steps and floor plate installation steps.
  • the additional floor plate installation process of installing the additional floor plate on the created ground is carried out.
  • a hook is provided on the additional floor plate (the same plate as the floor plate 6 may be used), and the additional floor plate is hung by a lifting machine such as a crane and installed on the ground.
  • the additional floor plates may be mutually fixed by welding or the like, if necessary. Then, after carrying out the additional floor board installation step, the net-like sheet installation step and the floor board installation step are carried out in order.
  • vibration reducing material 2 in which the mesh sheet 8 is sandwiched between the floor plate 6 and the additional floor plate.
  • vibration reducing material 2 constructed by such a method, when a heavy machine 4 such as a hydraulic excavator runs on the upper surface of the vibration reducing material 2, vibration can be effectively reduced as described in the first embodiment. , Stable running is ensured.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

L'invention concerne un matériau réducteur de vibrations au moyen duquel il est possible de réduire efficacement les vibrations associées au déplacement d'une machine lourde et de permettre à la machine lourde de se déplacer de façon stable. Un matériau réducteur de vibrations (2) comprend une planche (6) sur laquelle se déplace une machine lourde (4) et une feuille maillée (8) en résine synthétique et disposée sous la planche (6). La feuille maillée (8) possède plusieurs parties de contact supérieures (10a à 10e) en contact avec la surface inférieure de la planche (6) et plusieurs parties de contact inférieures (12a à 12e) en contact avec la surface sur laquelle la feuille maillée (8) est disposée. Dans un état dans lequel la feuille maillée (8) n'est pas déformée, les parties de liaison inférieures (12a à 12e) ne sont pas présentes immédiatement sous au moins une partie de la pluralité de parties de liaison supérieures (10a à 10e).
PCT/JP2021/033497 2020-10-07 2021-09-13 Matériau réducteur de vibrations WO2022075009A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020169546A JP2022061557A (ja) 2020-10-07 2020-10-07 振動低減材
JP2020-169546 2020-10-07

Publications (1)

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WO2022075009A1 true WO2022075009A1 (fr) 2022-04-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618130U (ja) * 1984-06-19 1986-01-18 トヨタ自動車株式会社 制振複合鋼板
JPH0479105U (fr) * 1990-11-21 1992-07-09
JPH05272588A (ja) * 1992-03-30 1993-10-19 Matsushita Electric Works Ltd 制振材
JP3152250U (ja) * 2009-05-13 2009-07-23 株式会社ジェイエスピー 重機等作業用防振マット
JP2011190653A (ja) * 2010-03-16 2011-09-29 Ohbayashi Corp 工事振動抑制方法
JP2014034813A (ja) * 2012-08-09 2014-02-24 Inoac Corp 重機上載用防振構造
JP2020118012A (ja) * 2019-01-25 2020-08-06 佐藤工業株式会社 重機等作業用の防振マット

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618130U (ja) * 1984-06-19 1986-01-18 トヨタ自動車株式会社 制振複合鋼板
JPH0479105U (fr) * 1990-11-21 1992-07-09
JPH05272588A (ja) * 1992-03-30 1993-10-19 Matsushita Electric Works Ltd 制振材
JP3152250U (ja) * 2009-05-13 2009-07-23 株式会社ジェイエスピー 重機等作業用防振マット
JP2011190653A (ja) * 2010-03-16 2011-09-29 Ohbayashi Corp 工事振動抑制方法
JP2014034813A (ja) * 2012-08-09 2014-02-24 Inoac Corp 重機上載用防振構造
JP2020118012A (ja) * 2019-01-25 2020-08-06 佐藤工業株式会社 重機等作業用の防振マット

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