WO2015151302A1 - Panneau et structure de fixation associée - Google Patents

Panneau et structure de fixation associée Download PDF

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Publication number
WO2015151302A1
WO2015151302A1 PCT/JP2014/067423 JP2014067423W WO2015151302A1 WO 2015151302 A1 WO2015151302 A1 WO 2015151302A1 JP 2014067423 W JP2014067423 W JP 2014067423W WO 2015151302 A1 WO2015151302 A1 WO 2015151302A1
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WO
WIPO (PCT)
Prior art keywords
panel
fall prevention
spiral
fixing
wire
Prior art date
Application number
PCT/JP2014/067423
Other languages
English (en)
Japanese (ja)
Inventor
友志郎 久保
Original Assignee
友志郎 久保
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 友志郎 久保 filed Critical 友志郎 久保
Priority to JP2014560167A priority Critical patent/JP5976848B2/ja
Priority to JP2015552309A priority patent/JP6000475B2/ja
Priority to KR1020167026566A priority patent/KR102077490B1/ko
Priority to CN201580018005.XA priority patent/CN106164376B/zh
Priority to PCT/JP2015/060385 priority patent/WO2015152340A1/fr
Priority to TW104110846A priority patent/TWI623667B/zh
Publication of WO2015151302A1 publication Critical patent/WO2015151302A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0011—Plank-like elements
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0023—Details, e.g. foundations
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
    • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material

Definitions

  • the present invention relates to a panel installed on a road shoulder or side wall of a highway such as a sound insulation panel for blocking noise of a traveling automobile or a concealment panel for concealing between a road and the outside, and a mounting structure of this panel It is a thing.
  • panels such as sound insulation panels and concealment panels are provided along roadways and side walls of expressways.
  • One example is a noise barrier provided along the road on both sides of the road in order to prevent the noise of a traveling automobile from being transmitted to the road surroundings.
  • the sound insulation wall is provided with pillars of a fixed height erected at fixed intervals on both sides of the road, and the sound insulation panel is mounted so as to straddle adjacent pillars, and the sound insulation wall has a desired height. To be arranged side by side in the height direction.
  • the sound insulation wall provided in this way may be bent or deformed when the car collides, so that the sound insulation panel may fall off from the column and drop.
  • wire ropes are inserted through a plurality of adjacent sound insulation panels in Patent Document 1 (Japanese Patent Application Laid-Open No. 9-151418) and Patent Document 2 (Japanese Patent Application Laid-Open No. 2003-313830). There is disclosed a technique for preventing the fall of a single sound insulation panel by causing them to
  • the sound insulation panel of Patent Document 1 is provided with penetrating portions provided penetrating in the height direction at both ends of each panel, and the penetrating portions at both ends of a plurality of panels arranged stacked in the height direction Each panel is connected in the height direction by inserting a pair of sound insulation board fall prevention cords into each other to prevent the fall of the individual panels.
  • a horizontal guide groove member for guiding a fall preventing rope member is provided on the back side of the panel so as to extend in the horizontal direction, and the drop prevention rope member is provided in the horizontal guide groove member.
  • the rings are inserted to allow the insertion of holes, and the fall prevention cords are inserted into the respective rings of the panels adjacent in the horizontal direction to connect the panels in the horizontal direction, preventing the individual panels from falling It is a thing.
  • the sound insulation panel of patent document 1 and 2 provides the penetration hole which lets a wire penetrate in a plurality of sound insulation panel, and fixes a plurality of panel. Therefore, for example, in the sound insulation panel of Patent Document 1, even when replacing the sound insulation panel located on the lower side, it is necessary to remove and perform all the sound insulation panels above the sound insulation panel to be replaced. Was very complicated. Similarly, in the panel of Patent Document 2, it is necessary to replace the sound insulation panel after removing the inserted wire from the ring of all the panels including the sound insulation panel connected to the sound insulation panel to be replaced. there were.
  • an object of the present invention is to solve the above-mentioned problems, and to provide a sound insulation panel and its mounting structure which are easy to replace.
  • the present invention is configured as follows to achieve the above object.
  • the panel according to the present invention is installed between a pair of panel mounting columns arranged at intervals in the lateral direction, and is provided with a fall preventing member on the back side for letting through a fall preventing wire fixed to the panel mounting columns.
  • Panel, and The fall prevention member is formed in a spiral shape, and a spiral portion defining an insertion space through which the fall prevention wire is inserted through a gap of the spiral, and the spiral portion connected to the rear side of the panel And a fixing portion for fixing the fall prevention member.
  • the fall prevention member can be easily configured by integrally forming the helical portion and the fixing portion by bending a rod-like member.
  • the fall prevention member is configured to be removable from the rear surface of the panel.
  • the fall prevention member is formed in a rod-like shape in which the fixing portion extends in a direction intersecting the axis of the spiral portion. It has a rotation preventing portion protruding in parallel with the fixed portion, The tip end side of the fixing portion and the rotation preventing portion is respectively inserted into the fixing hole and the insertion hole provided on the back surface of the panel, thereby preventing the rotation of the fall preventing member around the fixing portion.
  • the fall prevention member is formed in a rod-like shape in which the fixing portion extends in a direction intersecting the axis of the spiral portion.
  • the fixing portion has a non-circular cross section, and is inserted into a fixing hole having a shape corresponding to the cross-sectional shape of the rod-like member provided in the panel, thereby preventing rotation around the fixing portion.
  • the fall prevention member can be fixed in a state.
  • the drop prevention member can be fixed to the practitioner by using the fixing portion and fixing the fixing portion with the fixing nut in a state where the tip portion is constituted by the male screw and inserted into the fixing hole. .
  • the fall prevention member is fixed such that the axis of the spiral portion is in the short direction of the panel, and a plurality of sheets stacked in the short direction are configured to be mutually connectable by the fall prevention wire.
  • the panel mounting structure installs the panel between a pair of panel mounting columns arranged at intervals in the lateral direction, and is provided on the rear side of the panel
  • the panel mounting structure is configured to prevent the panel from falling by causing a fall preventing wire fixed to the panel mounting support to penetrate the fall preventing member.
  • the fall prevention member is formed in a spiral shape, and a spiral portion defining an insertion space through which the fall prevention wire is inserted through a gap of the spiral, and the spiral portion connected to the spiral portion on the back side of the panel It has a fixing part which fixes a fall prevention member part.
  • the anti-falling wire provided on the back of the panel installed between a pair of laterally spaced panel mounting posts and fixed to the panel mounting posts is penetrated.
  • a fall prevention fitting for preventing the panel from falling A helical portion which is helical and defines an insertion space through which the fall prevention wire is inserted through a gap of the helix, and is connected to the spiral portion to fix the fall prevention member on the back side of the panel And a fixing portion.
  • the drop prevention member is configured such that the cross section extending in the direction in which the fixing portion crosses the axis of the spiral portion is in a non-circular rod shape, so that the cross section of the rod-like member provided on the panel By fitting into the fixing hole of the shape corresponding to the shape, the fall preventing member can be easily fixed in a state in which the rotation around the fixing portion is prevented.
  • the fall prevention wire can be attached to and removed from the insertion space of the fall prevention member from the middle portion of the fall prevention wire through the gap of the spirally formed spiral portion of the fall prevention member.
  • the single panel can be removed without disassembling the Therefore, only the panel to be replaced can be removed alone from the inside of the road, and there is no need to set up a scaffolding or the like outside the road, so panel replacement work can be simplified.
  • the spiral portion of the fall prevention member is a rod-like member formed into a spiral shape, and in addition to being easy in construction, the connecting portion between the members and the movable like those combining a plurality of members There is no aged deterioration such as part. Therefore, it can be suitably used for the fall prevention of the panel of the highway exposed to a long term rain etc. for a long time.
  • FIG. 1 It is a schematic diagram which shows the sound-insulation panel attachment structure concerning one Embodiment of this invention. It is an assembly exploded view of the sound insulation panel attachment structure of FIG. It is a partial expanded sectional view which shows the structure of the support
  • FIG. 1 It is a perspective view which shows the further another structural example of a fall prevention metal fitting. It is a partially expanded perspective view of the fall prevention metal fitting of FIG. It is a disassembled perspective view which shows the attachment structure to the sound-insulation panel of the fall prevention metal fitting of FIG.
  • FIG. 1 is a schematic view showing a sound insulation panel mounting structure according to an embodiment of the present invention.
  • FIG. 2 is an exploded view of the sound insulation panel mounting structure of FIG.
  • the sound insulation panel mounting structure 1 is used for the sound insulation wall W erected on the side of the expressway R, and has a configuration shown in FIG. 1 viewed from the outside (rear side) of the expressway R. .
  • This sound insulation wall W is a panel mounting support made of H-shaped steel (hereinafter simply referred to as support and support) erected such that adjacent grooves M face each other with a certain distance along the longitudinal direction of the road R. Abbreviated.)
  • a plurality of sound insulation panels 3 are fixed between two.
  • the sound insulation panel 3 is for absorbing or absorbing the sound generated in the road to prevent or suppress leakage to the outside of the road, and is provided on the support 2 from the inside (front side) of the road.
  • the sound insulation panel 3 is mounted in a state of being stacked up and down so that the sound insulation wall W has a predetermined height.
  • the lower end portion of the support 2 is provided with a mounting portion 2a for fixing to the side wall S of the expressway R, and the support wire 2 is inserted through the mounting portion 2a.
  • the pillar fall prevention wire 6 prevents the pillars 2 and the like from falling down the road even when the attachment portion 2a of the pillar 2 is separated from the side wall S due to a collision of a car or the like by connecting a plurality of pillars.
  • the sound insulation panel 3 is configured by combining a punching metal 7 and a casing 9 located on the front surface located inside the road.
  • the casing 9 is a box-like member whose one surface is open, and the sound absorbing material 8 is housed inside, and the punching metal 7 is configured to close the opening portion of the casing 9.
  • the casing 9 is a flat metal member having an opening on the front surface, the opening being closed by a punching metal or the like, and mounting portions 10 for attaching to the support are provided at both ends. Further, as shown in FIG. 2 and FIG. 4, the casing 9 is provided with a water draining hole 9 a for discharging the rain and the like which penetrated from the through holes 7 of the punching metal and the like to the outside.
  • the sound insulation panel 3 is assembled such that the sound absorbing material 8 is housed in a casing and the opening of the casing is closed by a punching metal 7 or the like, and a screw provided in the mounting portion 10 of the casing 9
  • the bolt and nut 12 are inserted into the hole 11 and fixed to the front wall 2 f of the column 2.
  • the sound insulation panel 3 is mounted such that the punching metal 7 is positioned inside the road, and the sound generated by the road is absorbed by the sound absorbing material 8 in the casing 9 through the through holes of the punching metal 7 to make the road Prevent or suppress leakage outside.
  • the sound absorbing material 8 one which is usually used can be used. Generally, a fibrous body such as glass wool or polyester is used, but a porous body such as polyurethane foam, a powder sintered body such as ceramic, etc. may be used, and the type is not particularly limited. In addition, when using a fiber body as the sound absorbing material 8, it is preferable to provide protective films, such as scattering prevention.
  • the thickness dimension of the casing 9 is formed in a rib shape so that the central portion in the height direction is slightly shallow, and the strength against external force in the thickness direction is secured.
  • the fall prevention metal fitting 13 is arrange
  • a fall prevention metal fitting 13 is provided on the back side of the sound insulation panel 3, and by inserting the panel fall prevention wire 14 into the fall prevention member 13, a plurality of the sound insulation panels 3 are connected and deformed due to a collision of an automobile or the like. , To prevent the bent sound insulation panel 3 from falling down the road from the support 2.
  • the fall prevention fitting 13 is formed by bending a single rod member having a circular cross section, and is composed of a spiral portion 15, a housing portion 16, and a fixing portion 17, It is fixed to the back of the casing 9.
  • the panel anti-drop wire (hereinafter simply referred to as a panel wire) 14 connects a plurality of sound insulation panels 3 connected to one post 2.
  • the wire 14 for panels is described only to the support
  • Both ends (tip 14 a and end 14 b) of the panel wire are fixed near the lower end in the groove M of the support 2.
  • the start end 14a of the panel wire is fixed to the groove M on the right side in the figure, and is drawn upward on the support 2, and is inserted into the fall prevention fitting 13 of the sound insulation panel 3 on the left side.
  • the spiral portion 15 of the fall prevention fitting 13 is bent in a spiral shape and defines an insertion space 18 through which the panel wire 14 is inserted at a central portion.
  • the number of turns of the spiral portion 15 may be about 2 or more although it depends on the pitch D of the spiral, as long as the sound insulation panel 3 does not come off from the panel wire 14 when it falls off the support 2 This function can be secured.
  • the pitch D of the spiral is only required to be able to perform insertion work of the panel wire 14 described later with reference to FIG. As described later, the panel wire 14 is inserted into the insertion space 18 of the spiral portion through the gap 19 of the spiral portion 15.
  • the end 15a of the spiral portion 15 is required to be an open end.
  • the end 15a of the open end may be provided with a bar or the like so that the panel wire 14 does not easily come off. You can also.
  • the housing portion 16 extends from the lower end of the spiral portion 15 along the axis of the spiral portion 15, and the lower end is further bent approximately 90 ° to form a fixing portion 17.
  • the housing portion 16 secures a space between the fixing portion 17 and the spiral portion 15 to facilitate insertion work of the panel wire 14 and has a length of approximately several centimeters. It is configured.
  • the fixing portion 17 extends in a direction intersecting with the axis of the spiral portion 15, and fixes the fall prevention fitting 13 to the back surface of the sound insulation panel 3 by means of an external thread 17b provided at the tip.
  • the fixing portion 17 is inserted into a fixing hole 22 provided through the back of the casing 9 as shown in FIG. 3, and the casing is obtained by screwing the locking nut 20a and the fixing nut 20b with an external thread 17b. It is fixed to 9.
  • FIG. 6 is a view showing a process of inserting the panel wire into the fall preventing fitting.
  • the middle portion of the panel wire 14 is inserted into the gap 19 of the spiral portion 15, and the panel wire 14 is along the spiral portion 15 as shown by the arrow 90. It is moved within the gap 19 and inserted into the insertion space 18 from the distal end 15 a of the spiral portion 15. Thereby, it can be made to insert in the fall prevention metal fitting 13 from the middle part of the wire 14 for panels, and it can make it easy to desorb between both.
  • the fall prevention fitting 13 forms a spiral portion by bending one rod-like member, and the fall prevention fitting 13 and the panel wire 14 are formed by passing the panel wire 14 through the insertion space defined by the spiral portion. And the panel wire 14 connected once does not come off naturally.
  • the plurality of members are not combined and coupled, or a part of the annular portion is configured to be movable, manufacture is easy.
  • the fall prevention member 13 is exposed to wind and rain for a long time in use, but since there is no joint portion or movable portion as described above, the quality does not deteriorate with time without problems such as loosening and breakage.
  • FIG. 7 is a perspective view showing another configuration example of the fall prevention fitting. Since the fall prevention fitting 13 shown in FIG. 5 is screwed to the back side of the sound insulation panel 3 by the fixing portion 17 having a circular cross section, when the tightening strength of the nuts 20a and 20b is not sufficient, etc. The fall prevention fitting 13 may rotate and fall off.
  • a rotation preventing pin 21 as an example of a rotation preventing portion is provided in a protruding manner in parallel with the fixing portion 17 on the housing portion 16 By inserting the tip end portion of the rotation prevention pin 21 into the insertion hole 23 provided in the sound insulation panel 3, the rotation of the fall prevention fitting 13 can be prevented.
  • FIG. 8 is a perspective view showing still another configuration example of the fall prevention fitting.
  • FIG. 9 is a partially enlarged perspective view of the fall prevention fitting of FIG.
  • the fall preventing fitting 24 shown in FIG. 8 adds a locking mechanism to the fixing portion 25 so as not to rotate with respect to the sound insulation panel 3. ing.
  • the side surface of the male screw 26 of the fixing portion 25 is cut to form a flat portion 27, and the cross-sectional shape of the fixing portion 25 is configured to be substantially elliptical.
  • the fixing portion 25 is fitted in the fixing hole 28 by making the cross-sectional shape of the fixing portion 25 non-circular and making the fixing hole 28 in the shape of a long hole corresponding to the cross-sectional shape as shown in FIG.
  • the fall prevention fitting 24 can be prevented from rotating about the fixing portion 25.
  • the sound insulation panel 3 and the fall prevention fitting 24 can be fixed using locking nuts 20a and fixing nuts 20b disposed on both sides of the casing 9 of the sound insulation panel 3 as shown in FIG.
  • both ends of the panel wire 14 are fixed to the lower part of the column 2, and along the column 2, the installation route shown in FIG. Arrange as follows.
  • the panel wire 14 is inserted through the insertion space 18 of the fall prevention fitting 13 provided on the back side (outside) of the sound insulation panel 3 according to the procedure described above with reference to FIG. As described above, since the panel wire 14 is laid with a certain excess length, the panel wire 14 can be pulled to the near side of the column 2 to perform the insertion work.
  • the mounting portion 10 of the sound insulation panel 3 to which the fall prevention fitting 13 and the panel wire 14 are connected is brought into contact with the front wall 2f of the support column 2 to penetrate the screw hole 11 and the front wall 2f.
  • the bolt insertion holes are aligned, and the sound insulation panel 3 is fixed to the columns 2 and 2 by the bolts and nuts 12.
  • the sound insulation panel 3 may be removed in the reverse procedure as described above.
  • the sound insulation panel 3 is removed from the columns 2 and 2 so that the connection between the fall prevention fitting 13 and the panel wire 14 is removed.
  • the sound insulation panel 3 and the wire 14 for panel are connected to overlap the sound insulation panel 3 in the vertical direction and arranged.
  • the spiral wire of the panel wire 14 and the spiral portion is provided along the short direction of the sound insulation panel 3, the fall prevention metal fitting 13 or the fall prevention metal fitting 13 or the Since the panel wire 14 can be easily reached and both of them can be detached, the working efficiency can be improved.
  • the drop prevention metal fitting 13 and the panel wire 14 can be attached and detached from the middle portion of the panel wire 14. It is not necessary to remove the panel wire 14 from the support 2 and it is possible to pull out the sound insulation panel 3 to the road side (front side) side using the extra length of the panel wire 14. It has the advantage of being able to work from the inside.
  • the detachment of the fall prevention fitting 13 provided on the sound insulation panel 3 and the panel wire 14 is performed from the middle portion of the panel wire 14 Therefore, only the broken panel can be removed and replaced without disassembling the panel wire 14.
  • the fall prevention fitting 13 has a male screw portion directly attached to an intermediate position of the spiral portion 15, for example, in addition to one formed by bending one rod-like member as illustrated in FIG. Both ends of the spiral portion 15 may be configured to be open.
  • the shape of the fixing portion having a non-circular cross section for preventing the rotation prevention of the fall preventing fitting is not limited to a substantially elliptical shape, and may be another shape.
  • the helical part is carrying out the coil-like helical shape excellent in suspension strength, it may be comprised, for example, in one plane in the shape of a spiral. This configuration also allows the detachment between the fall prevention fitting and the panel wire to be performed from the middle portion of the panel wire, and even when the individual sound insulation panels are dropped from the columns, the sound insulation panels are dropped. It can be prevented.
  • the said embodiment was demonstrated as a sound insulation panel attachment structure, it is possible to apply similarly, for example in the attachment structure of the concealment panel for concealing the inside and the outer side of a road.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

La présente invention concerne un panneau insonorisant facilement remplaçable qui présente une excellente apparence. Le panneau insonorisant (3) est agencé entre une paire de colonnes de fixation de panneau (2) qui sont disposées séparément dans la direction horizontale, et comporte, sur le côté arrière, des éléments anti-chute (13) à travers lesquels des fils anti-chute (14) fixés au colonnes de fixation de panneau (2) passent. L'élément anti-chute (4) est pourvu : d'une partie en spirale (15) qui est courbée en forme de spirale et définit un espace d'insertion (18) à travers lequel le fil anti-chute (14) est inséré à travers un espace (19) dans la spirale, et une unité de fixation (17) qui est reliée à la partie en spirale (15) et fixe les éléments anti-chute (13) à la surface arrière du panneau (4).
PCT/JP2014/067423 2014-04-04 2014-06-30 Panneau et structure de fixation associée WO2015151302A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2014560167A JP5976848B2 (ja) 2014-04-04 2014-06-30 パネル及びその取付構造
JP2015552309A JP6000475B2 (ja) 2014-04-04 2015-04-01 パネル及びその取付構造
KR1020167026566A KR102077490B1 (ko) 2014-04-04 2015-04-01 패널 및 그 부착 구조
CN201580018005.XA CN106164376B (zh) 2014-04-04 2015-04-01 板部件及其安装构造
PCT/JP2015/060385 WO2015152340A1 (fr) 2014-04-04 2015-04-01 Panneau et sa structure de fixation
TW104110846A TWI623667B (zh) 2014-04-04 2015-04-02 遮板及其安裝構造

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-077793 2014-04-04
JP2014077793 2014-04-04

Publications (1)

Publication Number Publication Date
WO2015151302A1 true WO2015151302A1 (fr) 2015-10-08

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PCT/JP2014/067423 WO2015151302A1 (fr) 2014-04-04 2014-06-30 Panneau et structure de fixation associée
PCT/JP2015/060385 WO2015152340A1 (fr) 2014-04-04 2015-04-01 Panneau et sa structure de fixation

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PCT/JP2015/060385 WO2015152340A1 (fr) 2014-04-04 2015-04-01 Panneau et sa structure de fixation

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JP (2) JP5976848B2 (fr)
KR (1) KR102077490B1 (fr)
CN (1) CN106164376B (fr)
TW (1) TWI623667B (fr)
WO (2) WO2015151302A1 (fr)

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JP2020051137A (ja) * 2018-09-27 2020-04-02 日鉄建材株式会社 透光パネルの枠構造及び透光パネルの脱着方法
WO2021098743A1 (fr) * 2019-11-18 2021-05-27 中国铁道科学研究院集团有限公司节能环保劳卫研究所 Carte d'unité de barrière acoustique et système de barrière acoustique

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