WO2023149480A1 - Blow-in refrainer - Google Patents

Blow-in refrainer Download PDF

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Publication number
WO2023149480A1
WO2023149480A1 PCT/JP2023/003242 JP2023003242W WO2023149480A1 WO 2023149480 A1 WO2023149480 A1 WO 2023149480A1 JP 2023003242 W JP2023003242 W JP 2023003242W WO 2023149480 A1 WO2023149480 A1 WO 2023149480A1
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Prior art keywords
stopper
blow
suppressor
base
piece
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PCT/JP2023/003242
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French (fr)
Japanese (ja)
Inventor
朋泰 浦嶋
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有限会社ネットワークジャパン
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Publication of WO2023149480A1 publication Critical patent/WO2023149480A1/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts

Definitions

  • the technology disclosed in this specification relates to a technology for suppressing dust such as fallen leaves from blowing into a predetermined site.
  • Patent Document 1 an illegal entry restraining tool for restraining illegal intruders and vehicles from entering a predetermined site.
  • This anti-trespassing device has a structure in which an elastic plate that returns to its original shape even if it is bent is attached to the upper surface of a curb placed, for example, between a private property and a sidewalk.
  • garbage such as fallen leaves may blow into a predetermined area such as a warehouse or private property.
  • a predetermined area such as a warehouse or private property.
  • garbage and the like since there is generally no curb or the like at the entrance/exit of a warehouse, it is easy for garbage and the like to blow into the garage.
  • a technique for suppressing dust or the like from blowing into a predetermined area has not been sufficiently studied.
  • This specification discloses a technology capable of solving at least part of the above-described problems.
  • the blowing suppressor disclosed in this specification includes a plate-shaped base arranged along the floor surface, a plate-shaped base that protrudes upward from the upper surface of the base, and extends along a first direction, and an elastically deformable plate-like stopper. According to this blow-in suppressing tool, the stopper can return to the projecting posture even if it is stepped on by a vehicle or the like while suppressing the intrusion of dust or the like.
  • the stopper may be formed with a plurality of holes penetrating through the stopper. According to this blow-in suppressing tool, compared to a configuration in which the stopper is not formed with a hole, for example, the flow rate of the upward airflow that collides with the stopper is reduced, so that the intrusion of dust and the like can be suppressed more effectively.
  • an aperture ratio which is a ratio of the total opening area of the plurality of holes to the area of the stopper, may be 50% or less. According to this blow-in suppressing tool, it is possible to suppress the intrusion of dust and the like while improving the durability of the stopper, compared to a configuration having an opening ratio of, for example, greater than 50%.
  • the angle of the stopper with respect to the direction along the floor surface may be 85 degrees or less when the base is placed on the floor surface. According to the present blow-in suppressing tool, compared with a configuration in which the angle of the stopper is larger than 85 degrees, for example, the generation of an upward air current that strikes the stopper and heads directly upward is suppressed, so the intrusion of dust and the like is suppressed more effectively. can.
  • the angle of the stopper may be 60 degrees or more and 80 degrees or less. According to this blow-in suppressing tool, it is possible to suppress the intrusion of dust or the like that climbs over the stopper, compared to a configuration in which the angle of the stopper is less than 60 degrees, for example. In addition, as compared with a configuration in which the angle of the stopper is greater than 80 degrees, for example, generation of an ascending air current that strikes the stopper and heads directly upward is suppressed, so that the intrusion of dust and the like can be suppressed more effectively.
  • the stopper may include a plurality of stopper pieces arranged along the first direction. According to this blowing suppressor, only the stepped stopper piece among the plurality of stopper pieces is deformed, so that damage to the entire stopper portion can be suppressed.
  • the first gap in the first direction at the projecting tip end is equal to the above-mentioned gap on the base side.
  • the configuration may be such that the gap is wider than the second gap in the first direction.
  • the base includes at least a first base piece and a second base piece that can be attached and detached between a pair of mutually adjacent stopper pieces among the plurality of stopper pieces. and the first base piece and the second base piece overlap each other when viewed in a second direction perpendicular to the first direction and parallel to the floor surface It is good also as a structure which has. According to this blow-in suppressor, it is possible to divide the blow-in suppressor into a plurality of pieces, and to prevent fine dust such as sand from entering the predetermined site through the gap formed in the base. .
  • the base may be detachable from the floor surface.
  • the blow restrainer can be removed when not needed.
  • the technology disclosed by this specification can be implemented in various forms, for example, in the form of a blowing suppression method, a blowing suppressor, and the like.
  • FIG. 1 is a perspective view showing an external configuration of a blowing suppressor 100 according to a first embodiment
  • FIG. FIG. 3 is an explanatory view showing the YZ side configuration of the blow suppressor 100
  • FIG. 11 is a perspective view showing an external configuration of a blowing suppressor 100A in a second embodiment
  • It is an explanatory view showing the YZ side configuration of the blow suppressor 100A.
  • FIG. 1 is a perspective view showing the external configuration of the blow-in suppressor 100 in the first embodiment
  • FIG. 2 is an explanatory view showing the YZ side configuration of the blow-in suppressor 100.
  • FIG. 1 shows mutually orthogonal XYZ axes for specifying directions.
  • the Z-axis positive direction is called the upward direction
  • the Z-axis negative direction is called the downward direction.
  • the blow-in suppressor 100 is arranged near the entrance of a predetermined area (for example, a factory, a garage, a warehouse, a parking lot, a street store, a gas station, or a private residence), and is for suppressing dust or the like from blowing into the predetermined area.
  • a predetermined area for example, a factory, a garage, a warehouse, a parking lot, a street store, a gas station, or a private residence
  • the dust and the like include, for example, light dust such as fallen leaves and dead leaves, fine dust such as sand, and the like. Light dust tends to be blown up by air currents, and fine dust tends to pass through narrow gaps.
  • the blowing suppressor 100 has a configuration in which a plurality of stopper parts 110 are arranged side by side along a predetermined direction (the X-axis direction in FIG. 1, hereinafter referred to as the "alignment direction"). As will be described later, the stopper components 110 adjacent to each other in the alignment direction are detachable.
  • the alignment direction is an example of the first direction in the scope of claims.
  • the stopper component 110 has a base piece 120 and a stopper piece 130 .
  • the base piece 120 is a rectangular plate-like portion extending in the row direction.
  • the bottom surface 124 of the base piece 120 is arranged to face the floor surface M (or the ground).
  • the upper surface of the base piece 120 includes a planar portion 122 and a pair of tapered surface portions 123 . Both the plane portion 122 and the tapered surface portion 123 are surfaces extending along the alignment direction.
  • the plane portion 122 is arranged between the pair of tapered surface portions 123 when viewed in the vertical direction.
  • Planar portion 122 is generally parallel to lower surface 124 of base piece 120 .
  • the tapered surface portion 123 is an inclined surface that is inclined downward with respect to the flat surface portion 122 so as to approach the lower surface 124 as it approaches the side surface of the base piece 120 .
  • the tapered surface portion 123 is formed on the base piece 120, for example, when a vehicle (not shown) crosses the blow suppressor 100, the tire of the vehicle can smoothly ride on the upper surface of the base piece 120.
  • the base piece 120 is an example of a first base piece and a second base piece in the claims.
  • a first projection 126 is formed to protrude in the alignment direction.
  • a first recess 128 recessed in the alignment direction is formed.
  • the stopper piece 130 is provided on the top surface of the base piece 120 . Specifically, it is provided on the plane portion 122 of the base piece 120 .
  • the stopper piece 130 protrudes upward from the flat portion 122 of the base piece 120, extends along the alignment direction, and is elastically deformable.
  • a lower end portion of the stopper piece 130 is embedded in the base piece 120 .
  • the stopper piece 130 is elastically deformable so that the upper end side of the stopper piece 130 is displaced in a direction perpendicular to the arranging direction (Y-axis direction, hereinafter referred to as "front-rear direction" starting from the lower end side of the stopper piece 130.
  • Y-axis direction Y-axis direction
  • the stopper piece 130 is inclined with respect to the base piece 120 (see FIG. 2). As a result, for example, by directing the surface of the stopper piece 130 that faces obliquely downward (the left surface in FIG. 2) toward the outside of the warehouse, it is possible to suppress light dust such as dead leaves that are blown toward the warehouse from being blown up. can do. In addition, by turning the obliquely upward surface (the right surface in FIG. 2) of the stopper piece 130 toward the outside of the warehouse, for example, the content displayed on the surface (e.g., "slow down", "welcome”) can be displayed. easier for people to see.
  • the content displayed on the surface e.g., "slow down", "welcome
  • Both corners of the upper end portion of the stopper piece 130 are chamfered, and a gap S is formed between the stopper pieces 130 adjacent to each other.
  • the base piece 120 and the stopper piece 130 are made of the same material (for example, a resin material such as synthetic resin, or a rubber material such as natural rubber, synthetic rubber, or recycled rubber).
  • the base piece 120 and the stopper piece 130 may be made of different materials.
  • the base piece 120 has a configuration that can be attached to and detached from the floor surface M. Specifically, as shown in FIG. 2, a plate-shaped magnet 127 (strong magnet) is joined to the lower surface 124 of the base piece 120 . On the other hand, a metal plate N is embedded in the floor surface M. As a result, the base piece 120 can be attached to and detached from the floor surface M by magnetic force. Furthermore, in this embodiment, a pair of second projections 129 projecting downward are provided on the lower surface of the magnet 127 . On the other hand, the upper surface of the metal plate N is formed with a second concave portion N1 that can be engaged with the second convex portion 129 . Both the second protrusion 129 and the second recess N1 extend along the alignment direction. In addition, when viewed in the vertical direction, the second convex portion 129 and the second concave portion N1 are arranged on both one side and the other side of the stopper piece 130 in the front-rear direction (Y-axis direction).
  • the blowing suppressor 100 has a plurality of stopper pieces 130 provided on the upper surface of a base (base piece 120) arranged on the floor. Each stopper piece 130 projects upward from the upper surface of the base, extends along the alignment direction (X-axis direction), and is elastically deformable in the form of a flat plate (see FIGS. 1 and 2).
  • a blow-in suppressor 100 is arranged, for example, near the doorway of a predetermined area (such as a warehouse).
  • the base (plurality of base pieces 120) extends continuously over the plurality of stopper pieces 130, and there is no linear gap penetrating in the front-rear direction. Therefore, it is possible to prevent fine dust such as sand from entering the predetermined site through the gap formed in the base piece 120 .
  • the first gap in the row direction (X-axis direction) on the upper end side is larger than the second gap in the row direction on the base end side (base piece 120 side). Wide (see gap S).
  • the present embodiment compared to a configuration in which the gaps between the stopper pieces 130 are uniform over the entire length of the stopper pieces 130 in the vertical direction, the intrusion of dust and the like is suppressed, and the stoppers adjacent to each other when stepped on are prevented from entering. Interference between pieces 130 can be suppressed.
  • the one base piece 120 and the other base piece 120 can be attached and detached by inserting the first convex portion 126 of one base piece 120 into the first concave portion 128 of the other base piece 120 . connected as possible.
  • the base pieces 120 adjacent to each other have portions that overlap each other when viewed in the front-rear direction (Y-axis direction).
  • the blow suppressor 100 can be divided into a plurality of pieces, and fine dust such as sand can be prevented from entering the predetermined site through the gaps formed between the base pieces 120. can be suppressed.
  • the blow-in suppressor 100 can be divided into a plurality of parts, the blow-in suppressor 100 can be arranged with a length that matches the size of the doorway of a predetermined area, for example.
  • the base piece 120 has a configuration that can be attached to and detached from the floor surface M.
  • the blow-in suppressor 100 can be removed from the floor surface when the blow-in suppressor 100 does not need to be used, such as in a season when there are few fallen leaves.
  • FIG. 3 is a perspective view showing the external configuration of the blow suppressor 100A in the second embodiment
  • FIG. 4 is an explanatory view showing the YZ side configuration of the blow suppressor 100A.
  • the blowing suppressor 100A has a configuration in which a plurality of stopper parts 110A are arranged side by side along a predetermined direction (in FIG. 3, the X-axis direction, hereinafter referred to as "arrangement direction"). As will be described later, the stopper parts 110A that are adjacent to each other in the alignment direction are detachable.
  • the stopper component 110A has a base piece 120A and a stopper piece 130A.
  • the base piece 120A is a rectangular plate-like portion extending in the row direction.
  • the bottom surface 124A of the base piece 120A is arranged to face the floor surface M (or the ground) (see FIG. 4).
  • the upper surface of the base piece 120A includes a joint portion 122A and a pair of tapered surface portions 123A. Both the joint portion 122A and the tapered surface portion 123A are surfaces extending along the alignment direction. As viewed in the vertical direction, the joint portion 122A is arranged between the pair of tapered surface portions 123A.
  • 123 A of taper surface parts are inclined surfaces which incline downward so that the lower surface 124A may be approached, so that it leaves
  • the stopper piece 130A is provided on the upper surface of the base piece 120A. Specifically, it is joined to the joint portion 122A of the base piece 120A.
  • the stopper piece 130A protrudes upward from the joint portion 122A of the base piece 120A, extends along the alignment direction, and has an elastically deformable flat plate shape.
  • the stopper piece 130A is elastically deformable so that the upper end side of the stopper piece 130A is displaced in a direction perpendicular to the direction in which the stopper piece 130A is arranged (hereinafter referred to as the "front-rear direction"), starting from the lower end side of the stopper piece 130A.
  • front-rear direction a direction perpendicular to the direction in which the stopper piece 130A is arranged
  • a plurality of holes P passing through the stopper piece 130A are formed in the stopper piece 130A.
  • the plurality of holes P have substantially the same opening shape and substantially the same opening area.
  • at least one of the opening shape and the opening area of at least some of the plurality of holes P may be different from each other.
  • the shape of the opening of the hole P is not limited to a circle, and may be an ellipse, a polygon, or the like.
  • the plurality of holes P are arranged so as to be substantially uniformly dispersed in the stopper piece 130A.
  • the plurality of holes P are arranged at regular intervals. With such a configuration, it is possible to suppress the generation of unintended air currents due to variations in the arrangement of the holes P and the shape of the openings of the stopper pieces 130A, and to suppress the intrusion of dust and the like.
  • the maximum width of the opening shape of one hole P is preferably set as appropriate according to the size of dust or the like whose entry is to be suppressed.
  • the maximum width of the opening shape of one hole P may be, for example, 5 mm or more, 10 mm or more, or 15 mm or more.
  • the maximum width of the opening shape of one hole P may be, for example, 40 mm or less, 30 mm or less, or 20 mm or less.
  • it is preferable that the maximum width of the opening shape of one hole P is larger than the thickness (for example, 4 mm) of the stopper piece 130A.
  • the distance between the upper end of the stopper piece 130A and the hole P closest to the upper end is smaller than the maximum width of the opening shape of one hole P. Moreover, it is preferable that the distance between the holes P adjacent to each other is smaller than the maximum width of the opening shape of one hole P.
  • the opening ratio which is the ratio of the total opening area of all the holes P to the area of the stopper piece 130A (area of the outer shape of the stopper piece 130A), is referred to as hole opening ratio.
  • the aperture ratio may be, for example, 10% or more, 20% or more, 30% or more, or 40% or more. Also, the aperture ratio may be, for example, 70% or less, 60% or less, 50% or less, or 40% or less.
  • the stopper piece 130A is inclined with respect to the direction perpendicular to the floor surface M (the Z-axis direction in FIG. 4). Specifically, when the base piece 120A is placed on the floor surface M, the angle ⁇ of the stopper with respect to the direction along the floor surface M (the Y-axis direction in FIG. 4) is 85 degrees or less.
  • the angle ⁇ of the stopper may be 80 degrees or less, 75 degrees or less, or 70 degrees or less. Also, the angle ⁇ of the stopper may be 50 degrees or more, 55 degrees or more, 60 degrees or more, or 65 degrees or more.
  • concave and convex portions are formed for detachably connecting with other stopper parts 110A.
  • a first convex portion 126A that protrudes in the alignment direction is formed at one end of the stopper piece 130A in the alignment direction.
  • a first recess 128A recessed in the alignment direction is formed at the other end of the stopper piece 130A in the alignment direction.
  • the stopper piece 130A is preferably made of a material having higher flexibility (elasticity) than the base piece 120A.
  • the forming material of the stopper piece 130A is, for example, a medium density fiberboard (MDF (Medium Density Fiberboard)), and the forming material of the base piece 120A is, for example, a biodegradable plastic (PLA (Poly-Lactic Acid)).
  • MDF Medium Density Fiberboard
  • PLA Poly-Lactic Acid
  • the smoke wire method is a method of applying liquid paraffin to a nichrome wire and applying an alternating voltage to generate smoke.
  • a laser sheet is used as the light source for visualizing the smoke.
  • the velocity of the airflow in the wind tunnel measurement section was set to about 4 to 8 m/s, and the artificial leaf L was flowed along with the airflow.
  • the artificial leaf L was made of paper (weight: 011 g, length: 6 cm, width: 2.2 cm).
  • the visualized smoke and artificial leaf L are imaged with a high-speed camera.
  • the high-speed camera is, for example, monochrome, and the photographing speed is 2000 fps.
  • samples a plurality of blow-in suppressors having different at least one of the presence/absence of holes P, the aperture ratio, the angle ⁇ of the stopper, and the maximum width of the opening shape of one hole P were prepared.
  • the higher the pore opening ratio the more the artificial leaf L was inhibited from climbing over the sample.
  • the closer the angle ⁇ of the stopper was to 70 degrees the more the artificial leaves L were suppressed from climbing over the sample.
  • the blow suppressors 100, 100A are configured to extend in the linear direction (X-axis direction), but are not limited to this, and may A configuration extending in a straight direction or a configuration extending in a crank shape may be used.
  • the first direction is not limited to a linear direction, but may be a curved direction, a crank shape, or the like.
  • a plurality of base pieces 120 and 120A are connected as a base, but this is not limiting, and a single plate member extending in the row direction may be used.
  • the configuration for attaching and detaching the plurality of base pieces 120 is not limited to the engagement between the first convex portion 126 and the first concave portion 128.
  • a configuration using magnetic force such as a magnet
  • the insertion protrusion and the insertion recess may be press-fitted.
  • a plurality of stopper pieces 130 and 130A are connected as stoppers, but this is not limitative, and a single plate member extending in the row direction may be used.
  • the plurality of stopper components 110, 110A have the same shape, but at least some of the plurality of stopper components 110, 110A may have different shapes.
  • the length of one stopper component 110, 110A (or base piece 120, 120A or stopper piece 130, 130A) in the direction of arrangement is equal to that of another stopper component 110, 110A (or base piece 120, 120A or stopper piece). 130, 130A) in the alignment direction.
  • one or more holes may be formed in the stopper piece 130 .
  • part of the wind blown toward the stopper piece 130 passes through the hole formed in the stopper piece 130 to form an air current. Therefore, compared to a configuration in which the stopper piece 130 is not formed with a hole, it is possible to suppress light dust such as dead leaves from rising upward and entering beyond the stopper piece 130.
  • the aperture ratio of the holes formed in the stopper piece 130 is higher on the upper end side than on the base end side of the stopper piece 130 .
  • a hole or a notch may be formed only on the upper end side of the stopper piece 130 .
  • the depth may be the same or may be different.
  • the projection length of the projection having an obtuse angle with the stopper can 123A). According to this configuration, it is possible to reduce the overall weight of the blow suppressors 100 and 100A, and prevent the blow suppressors 100 and 100A from overturning due to the blown wind.
  • the angle ⁇ of the stopper may be 90 degrees.

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Abstract

The present invention refrains litters such as fallen leaves from being blown into predetermined premises. A blow-in refrainer includes a base and a plurality of stopper pieces. The base is shaped like an elongate plate disposed on a floor surface and extending in a first direction. The plurality of stopper pieces are provided on an upper surface of the base in juxtaposition in the first direction. Each of the stopper pieces is shaped like a flat plate that protrudes upward from the upper surface of the base and that extends along the first direction and that is elastically deformable. This allows the blow-in refrainer to recover even when trodden on by a vehicle or the like while refraining entry of litters and the like.

Description

吹き込み抑制具blow-in suppressor
　本明細書に開示される技術は、落ち葉等のゴミ等が所定の敷地内に吹き込むことを抑制するための技術に関する。 The technology disclosed in this specification relates to a technology for suppressing dust such as fallen leaves from blowing into a predetermined site.
　従来、不法に侵入する人や車が所定の敷地内に侵入することを抑制するための不法侵入抑制具が知られている（特許文献１参照）。この不法侵入抑制具は、例えば私有地と歩道との間に配置された縁石の上面に、折り曲げても元に戻る弾力ある板が装着された構成である。 Conventionally, there has been known an illegal entry restraining tool for restraining illegal intruders and vehicles from entering a predetermined site (see Patent Document 1). This anti-trespassing device has a structure in which an elastic plate that returns to its original shape even if it is bent is attached to the upper surface of a curb placed, for example, between a private property and a sidewalk.
特開２０１１－８０３５３号公報JP 2011-80353 A
　ところで、落ち葉等のゴミ等が、倉庫内や私有地等の所定の領域に吹き込むことがある。例えば、一般に倉庫の出入り口には縁石等は存在しないため、ゴミ等が車庫内に吹き込みやすい。しかし、ゴミ等が所定の領域に吹き込むことを抑制するための技術について十分に検討されていなかった。 By the way, garbage such as fallen leaves may blow into a predetermined area such as a warehouse or private property. For example, since there is generally no curb or the like at the entrance/exit of a warehouse, it is easy for garbage and the like to blow into the garage. However, a technique for suppressing dust or the like from blowing into a predetermined area has not been sufficiently studied.
　本明細書では、上述した課題の少なくとも一部を解決することが可能な技術を開示する。 This specification discloses a technology capable of solving at least part of the above-described problems.
　本明細書に開示される技術は、以下の形態として実現することが可能である。 The technology disclosed in this specification can be implemented as the following forms.
（１）本明細書に開示される吹き込み抑制具は、床面に沿って配置される板状のベースと、前記ベースの上面から上方に突出し、かつ、第１の方向に沿って延びるとともに、弾性変形可能な平板状のストッパと、を備える。本吹き込み抑制具によれば、ゴミ等の侵入を抑制しつつ、車両等に踏まれてもストッパが突出姿勢に復帰できる。 (1) The blowing suppressor disclosed in this specification includes a plate-shaped base arranged along the floor surface, a plate-shaped base that protrudes upward from the upper surface of the base, and extends along a first direction, and an elastically deformable plate-like stopper. According to this blow-in suppressing tool, the stopper can return to the projecting posture even if it is stepped on by a vehicle or the like while suppressing the intrusion of dust or the like.
（２）上記吹き込み抑制具において、前記ストッパには、前記ストッパを貫通する複数の孔が形成されている構成としてもよい。本吹き込み抑制具によれば、例えばストッパに孔が形成されていない構成に比べて、ストッパに突き当たって上方に向かう気流の流量が低減されるため、ゴミ等の侵入をより効果的に抑制できる。 (2) In the above-described blow-in suppressor, the stopper may be formed with a plurality of holes penetrating through the stopper. According to this blow-in suppressing tool, compared to a configuration in which the stopper is not formed with a hole, for example, the flow rate of the upward airflow that collides with the stopper is reduced, so that the intrusion of dust and the like can be suppressed more effectively.
（３）上記吹き込み抑制具において、前記ストッパの面積に対する前記複数の孔の合計開口面積の割合である開口率は、５０％以下である構成としてもよい。本吹き込み抑制具によれば、例えば開口率が５０％よりも大きい構成に比べて、ストッパの耐久性の向上を図りつつ、ゴミ等の侵入を抑制できる。 (3) In the above-described blowing suppressor, an aperture ratio, which is a ratio of the total opening area of the plurality of holes to the area of the stopper, may be 50% or less. According to this blow-in suppressing tool, it is possible to suppress the intrusion of dust and the like while improving the durability of the stopper, compared to a configuration having an opening ratio of, for example, greater than 50%.
（４）上記吹き込み抑制具において、前記ベースが前記床面に配置された状態で、前記床面に沿った方向に対する前記ストッパの角度は、８５度以下である構成としてもよい。本吹き込み抑制具によれば、例えばストッパの角度が８５度より大きい構成に比べて、ストッパに突き当たって真上に向かう上昇気流の発生が抑制されるため、ゴミ等の侵入をより効果的に抑制できる。 (4) In the above-described blowing suppressor, the angle of the stopper with respect to the direction along the floor surface may be 85 degrees or less when the base is placed on the floor surface. According to the present blow-in suppressing tool, compared with a configuration in which the angle of the stopper is larger than 85 degrees, for example, the generation of an upward air current that strikes the stopper and heads directly upward is suppressed, so the intrusion of dust and the like is suppressed more effectively. can.
（５）上記吹き込み抑制具において、前記ストッパの前記角度は、６０度以上、かつ、８０度以下である構成としてもよい。本吹き込み抑制具によれば、例えばストッパの角度が６０度未満である構成に比べて、ストッパを乗り越えるゴミ等の侵入を抑制できる。また、例えばストッパの角度が８０度より大きい構成に比べて、ストッパに突き当たって真上に向かう上昇気流の発生が抑制されるため、ゴミ等の侵入をより効果的に抑制できる。 (5) In the blow suppressor, the angle of the stopper may be 60 degrees or more and 80 degrees or less. According to this blow-in suppressing tool, it is possible to suppress the intrusion of dust or the like that climbs over the stopper, compared to a configuration in which the angle of the stopper is less than 60 degrees, for example. In addition, as compared with a configuration in which the angle of the stopper is greater than 80 degrees, for example, generation of an ascending air current that strikes the stopper and heads directly upward is suppressed, so that the intrusion of dust and the like can be suppressed more effectively.
（６）上記吹き込み抑制具において、前記ストッパは、前記第１の方向に沿って並ぶ複数のストッパ片を含む構成としてもよい。本吹き込み抑制具によれば、複数のストッパ片のうち、踏まれたストッパ片のみが変形するから、ストッパ部全体への損傷を抑制できる。 (6) In the above-described blowing suppressor, the stopper may include a plurality of stopper pieces arranged along the first direction. According to this blowing suppressor, only the stepped stopper piece among the plurality of stopper pieces is deformed, so that damage to the entire stopper portion can be suppressed.
（７）上記吹き込み抑制具において、前記複数のストッパ片のうち、少なくとも、互いに隣り合う１組のストッパ片同士について、突出先端における前記第１の方向の第１の隙間は、前記ベース側における前記第１の方向の第２の隙間よりも広い構成としてもよい。本吹き込み抑制具によれば、ストッパ片同士の隙間が、ストッパ片の全長にわたって均一である構成に比べて、ゴミ等の侵入を抑制しつつ、踏まれたときに互いに隣り合うストッパ片同士が干渉することを抑制できる。 (7) In the above-described blow-in suppressing tool, for at least one set of stopper pieces that are adjacent to each other among the plurality of stopper pieces, the first gap in the first direction at the projecting tip end is equal to the above-mentioned gap on the base side. The configuration may be such that the gap is wider than the second gap in the first direction. According to this blow-in suppressing tool, compared to a configuration in which the gaps between the stopper pieces are uniform over the entire length of the stopper pieces, the stopper pieces that are adjacent to each other interfere with each other when being stepped on while suppressing the intrusion of dust and the like. can be suppressed.
（８）上記吹き込み抑制具において、前記ベースは、前記複数のストッパ片のうち、少なくとも、互いに隣り合う１組のストッパ片同士の間で着脱可能な第１のベース片と第２のベース片とを有しており、前記第１のベース片と前記第２のベース片とは、前記第１の方向に垂直であり、かつ、前記床面に平行な第２の方向視で、互いに重なり合う部分を有している構成としてもよい。本吹き込み抑制具によれば、吹き込み抑制具を複数に分割可能としつつ、砂等の微小なゴミ等がベースに形成された隙間を介して所定の敷地内に侵入することを抑制することができる。 (8) In the blow suppressor, the base includes at least a first base piece and a second base piece that can be attached and detached between a pair of mutually adjacent stopper pieces among the plurality of stopper pieces. and the first base piece and the second base piece overlap each other when viewed in a second direction perpendicular to the first direction and parallel to the floor surface It is good also as a structure which has. According to this blow-in suppressor, it is possible to divide the blow-in suppressor into a plurality of pieces, and to prevent fine dust such as sand from entering the predetermined site through the gap formed in the base. .
（９）上記吹き込み抑制具において、前記ベースは、前記床面に対して着脱可能な構成を有している構成としてもよい。本吹き込み抑制具によれば、不要なときに取り外せる。 (9) In the blowing suppressor, the base may be detachable from the floor surface. The blow restrainer can be removed when not needed.
　本明細書によって開示される技術は、種々の形態で実現することが可能であり、例えば、吹き込み抑制方法および吹き込み抑制具等の形態で実現することが可能である。 The technology disclosed by this specification can be implemented in various forms, for example, in the form of a blowing suppression method, a blowing suppressor, and the like.
第１実施形態における吹き込み抑制具１００の外観構成を示す斜視図である。1 is a perspective view showing an external configuration of a blowing suppressor 100 according to a first embodiment; FIG. 吹き込み抑制具１００のＹＺ側面構成を示す説明図である。FIG. 3 is an explanatory view showing the YZ side configuration of the blow suppressor 100; 第２実施形態における吹き込み抑制具１００Ａの外観構成を示す斜視図である。FIG. 11 is a perspective view showing an external configuration of a blowing suppressor 100A in a second embodiment; 吹き込み抑制具１００ＡのＹＺ側面構成を示す説明図である。It is an explanatory view showing the YZ side configuration of the blow suppressor 100A.
Ａ．第１実施形態：
Ａ－１．吹き込み抑制具１００の構成：
　図１は、第１実施形態における吹き込み抑制具１００の外観構成を示す斜視図であり、図２は、吹き込み抑制具１００のＹＺ側面構成を示す説明図である。各図には、方向を特定するための互いに直交するＸＹＺ軸が示されている。本明細書では、便宜的に、Ｚ軸正方向を上方向と呼び、Ｚ軸負方向を下方向と呼ぶものとする。 A. First embodiment:
A-1. Configuration of the blow suppressor 100:
FIG. 1 is a perspective view showing the external configuration of the blow-in suppressor 100 in the first embodiment, and FIG. 2 is an explanatory view showing the YZ side configuration of the blow-in suppressor 100. As shown in FIG. Each figure shows mutually orthogonal XYZ axes for specifying directions. In this specification, for the sake of convenience, the Z-axis positive direction is called the upward direction, and the Z-axis negative direction is called the downward direction.
　吹き込み抑制具１００は、所定の領域（例えば工場、車庫、倉庫、駐車場、路面店舗、ガソリンスタンド、個人宅）の入り口付近に配置され、ゴミ等が所定の領域に吹き込むことを抑制するための器具である。なお、ゴミ等には、例えば、落ち葉や枯れ葉等の軽いゴミ、砂等の微小なゴミなどが含まれる。軽いゴミは、気流に乗って舞い上がりやすく、微小なゴミは、狭い隙間を通過しやすい。 The blow-in suppressor 100 is arranged near the entrance of a predetermined area (for example, a factory, a garage, a warehouse, a parking lot, a street store, a gas station, or a private residence), and is for suppressing dust or the like from blowing into the predetermined area. It is an instrument. Note that the dust and the like include, for example, light dust such as fallen leaves and dead leaves, fine dust such as sand, and the like. Light dust tends to be blown up by air currents, and fine dust tends to pass through narrow gaps.
　図１に示すように、吹き込み抑制具１００は、複数のストッパ部品１１０が所定方向（図１では、Ｘ軸方向、以下、「並び方向」という）に沿って並べて配置された構成である。後述するように、並び方向に互いに隣り合うストッパ部品１１０同士は、着脱可能とされている。並び方向は、特許請求の範囲における第１の方向の一例である。 As shown in FIG. 1, the blowing suppressor 100 has a configuration in which a plurality of stopper parts 110 are arranged side by side along a predetermined direction (the X-axis direction in FIG. 1, hereinafter referred to as the "alignment direction"). As will be described later, the stopper components 110 adjacent to each other in the alignment direction are detachable. The alignment direction is an example of the first direction in the scope of claims.
　複数のストッパ部品１１０は、いずれも同じ形状である。具体的には、ストッパ部品１１０は、ベース片１２０と、ストッパ片１３０とを有している。 All of the plurality of stopper parts 110 have the same shape. Specifically, the stopper component 110 has a base piece 120 and a stopper piece 130 .
　ベース片１２０は、並び方向に延びる長方形状の板状部分である。ベース片１２０の下面１２４が床面Ｍ（地面でもよい）に対向するように配置される。ベース片１２０の上面は、平面部分１２２と、一対のテーパ面部分１２３とを含んでいる。平面部分１２２とテーパ面部分１２３とは、いずれも並び方向に沿って延びている面である。上下方向視で、平面部分１２２は、一対のテーパ面部分１２３の間に配置されている。平面部分１２２は、ベース片１２０の下面１２４に略平行である。テーパ面部分１２３は、平面部分１２２に対して、ベース片１２０の側面に近くなるほど下面１２４に近づくように下方に傾斜している傾斜面である。ベース片１２０にテーパ面部分１２３が形成されているため、例えば、車両（図示しない）が吹き込み抑制具１００を横断する際、車両のタイヤをベース片１２０の上面に円滑に乗り上げさせることができる。ベース片１２０は、特許請求の範囲における第１のベース片、第２のベース片の一例である。 The base piece 120 is a rectangular plate-like portion extending in the row direction. The bottom surface 124 of the base piece 120 is arranged to face the floor surface M (or the ground). The upper surface of the base piece 120 includes a planar portion 122 and a pair of tapered surface portions 123 . Both the plane portion 122 and the tapered surface portion 123 are surfaces extending along the alignment direction. The plane portion 122 is arranged between the pair of tapered surface portions 123 when viewed in the vertical direction. Planar portion 122 is generally parallel to lower surface 124 of base piece 120 . The tapered surface portion 123 is an inclined surface that is inclined downward with respect to the flat surface portion 122 so as to approach the lower surface 124 as it approaches the side surface of the base piece 120 . Since the tapered surface portion 123 is formed on the base piece 120, for example, when a vehicle (not shown) crosses the blow suppressor 100, the tire of the vehicle can smoothly ride on the upper surface of the base piece 120. The base piece 120 is an example of a first base piece and a second base piece in the claims.
　ベース片１２０の並び方向（Ｘ軸方向）の両端には、他のストッパ部品１１０と着脱可能に連結するための凹凸部が形成されている。具体的には、ベース片１２０の並び方向の一端には、該並び方向に突出する第１の凸部１２６が形成されている。ベース片１２０の並び方向の他端には、該並び方向に窪んだ第１の凹部１２８が形成されている。一のベース片１２０の第１の凸部１２６を、他のベース片１２０の第１の凹部１２８に挿入することにより、一のベース片１２０と他のベース片１２０とを連結することができる。なお、互いに連結された複数のベース片１２０は、特許請求の範囲におけるベースの一例である。 On both ends of the base piece 120 in the alignment direction (X-axis direction), concave and convex portions are formed for detachably connecting with other stopper parts 110 . Specifically, at one end of the base piece 120 in the alignment direction, a first projection 126 is formed to protrude in the alignment direction. At the other end of the base piece 120 in the alignment direction, a first recess 128 recessed in the alignment direction is formed. By inserting the first projection 126 of one base piece 120 into the first recess 128 of the other base piece 120, the one base piece 120 and the other base piece 120 can be connected. The plurality of base pieces 120 connected to each other is an example of the base in the claims.
　ストッパ片１３０は、ベース片１２０の上面に設けられている。具体的には、ベース片１２０の平面部分１２２上に設けられている。ストッパ片１３０は、ベース片１２０の平面部分１２２から上方に突出するとともに並び方向に沿って延び、かつ、弾性変形可能な平板状である。ストッパ片１３０の下端部がベース片１２０に埋め込まれるようにして設けられている。ストッパ片１３０は、ストッパ片１３０の下端側を起点として、ストッパ片１３０の上端側が並び方向に直交する方向（Ｙ軸方向　以下、「前後方向」という）に変位するように弾性変形可能になっている。複数のストッパ片１３０は、特許請求の範囲におけるストッパの一例である。 The stopper piece 130 is provided on the top surface of the base piece 120 . Specifically, it is provided on the plane portion 122 of the base piece 120 . The stopper piece 130 protrudes upward from the flat portion 122 of the base piece 120, extends along the alignment direction, and is elastically deformable. A lower end portion of the stopper piece 130 is embedded in the base piece 120 . The stopper piece 130 is elastically deformable so that the upper end side of the stopper piece 130 is displaced in a direction perpendicular to the arranging direction (Y-axis direction, hereinafter referred to as "front-rear direction") starting from the lower end side of the stopper piece 130. there is A plurality of stopper pieces 130 is an example of a stopper in the claims.
　ストッパ片１３０は、ベース片１２０に対して傾斜している（図２参照）。これにより、例えば、ストッパ片１３０のうち、斜め下方向を向く面（図２の左側の面）を倉庫の外側に向けることにより、倉庫に向かって吹き付ける枯れ葉等の軽いゴミ等が舞い上がることを抑制することができる。また、ストッパ片１３０のうち、斜め上方向を向く面（図２の右側の面）を倉庫の外側に向けることにより、例えば該面に表示した内容（例えば「徐行」「いらっしゃいませ」）が来訪者から見やすくなる。 The stopper piece 130 is inclined with respect to the base piece 120 (see FIG. 2). As a result, for example, by directing the surface of the stopper piece 130 that faces obliquely downward (the left surface in FIG. 2) toward the outside of the warehouse, it is possible to suppress light dust such as dead leaves that are blown toward the warehouse from being blown up. can do. In addition, by turning the obliquely upward surface (the right surface in FIG. 2) of the stopper piece 130 toward the outside of the warehouse, for example, the content displayed on the surface (e.g., "slow down", "welcome") can be displayed. easier for people to see.
　ストッパ片１３０の上端部の両側の角部は面取りされており、互いに隣り合うストッパ片１３０同士の間で隙間Ｓが形成されている。 Both corners of the upper end portion of the stopper piece 130 are chamfered, and a gap S is formed between the stopper pieces 130 adjacent to each other.
　本実施形態では、ベース片１２０とストッパ片１３０とは、同じ材料（例えば、合成樹脂等の樹脂材料、天然ゴム、合成ゴムや再生ゴム等のゴム材料）により形成されている。但し、ベース片１２０とストッパ片１３０とを、互いに異なる材料により形成してもよい。 In this embodiment, the base piece 120 and the stopper piece 130 are made of the same material (for example, a resin material such as synthetic resin, or a rubber material such as natural rubber, synthetic rubber, or recycled rubber). However, the base piece 120 and the stopper piece 130 may be made of different materials.
　ベース片１２０は、床面Ｍに対して着脱可能な構成を有している。具体的には、図２に示すように、ベース片１２０の下面１２４には、板状のマグネット１２７（強力マグネット）が接合されている。一方、床面Ｍには、金属板Ｎが埋設されている。これにより、ベース片１２０が床面Ｍに対して磁力により着脱可能になっている。さらに、本実施形態では、マグネット１２７の下面には、下方に突出する一対の第２の凸部１２９が設けられている。一方、金属板Ｎの上面には、第２の凸部１２９と係合可能な第２の凹部Ｎ１が形成されている。第２の凸部１２９および第２の凹部Ｎ１は、いずれも、並び方向に沿って延びている。また、上下方向視で、第２の凸部１２９と第２の凹部Ｎ１とは、ストッパ片１３０に対して、前後方向（Ｙ軸方向）の一方側と他方側との両方にそれぞれ配置されている。 The base piece 120 has a configuration that can be attached to and detached from the floor surface M. Specifically, as shown in FIG. 2, a plate-shaped magnet 127 (strong magnet) is joined to the lower surface 124 of the base piece 120 . On the other hand, a metal plate N is embedded in the floor surface M. As a result, the base piece 120 can be attached to and detached from the floor surface M by magnetic force. Furthermore, in this embodiment, a pair of second projections 129 projecting downward are provided on the lower surface of the magnet 127 . On the other hand, the upper surface of the metal plate N is formed with a second concave portion N1 that can be engaged with the second convex portion 129 . Both the second protrusion 129 and the second recess N1 extend along the alignment direction. In addition, when viewed in the vertical direction, the second convex portion 129 and the second concave portion N1 are arranged on both one side and the other side of the stopper piece 130 in the front-rear direction (Y-axis direction). there is
Ａ－２．本実施形態の効果：
　本実施形態に係る吹き込み抑制具１００は、床面に配置されるベース（ベース片１２０）の上面に複数のストッパ片１３０が設けられている。各ストッパ片１３０は、ベースの上面から上方に突出するとともに並び方向（Ｘ軸方向）に沿って延び、かつ、弾性変形可能な平板状である（図１および図２参照）。このような吹き込み抑制具１００は、例えば所定の領域（倉庫等）の出入り口付近に配置される。例えば所定の領域に向かって吹き付ける気流に乗って流れ込むゴミ等は、複数のストッパ片１３０に衝突し、その結果、ゴミ等が所定の領域内に吹き込むことが抑制される。また、所定の領域に出し入れされる車両は、吹き込み抑制具１００を踏みつけつつ横断することになる。しかし、ストッパ片１３０は、弾性変形するため、ストッパ片１３０の損傷が抑制される。さらに、複数のストッパ片１３０のうち、車両のタイヤ等に踏まれたストッパ片１３０のみが変形するから、ストッパ部全体への損傷が抑制される。 A-2. Effect of this embodiment:
The blowing suppressor 100 according to the present embodiment has a plurality of stopper pieces 130 provided on the upper surface of a base (base piece 120) arranged on the floor. Each stopper piece 130 projects upward from the upper surface of the base, extends along the alignment direction (X-axis direction), and is elastically deformable in the form of a flat plate (see FIGS. 1 and 2). Such a blow-in suppressor 100 is arranged, for example, near the doorway of a predetermined area (such as a warehouse). For example, dust or the like that flows along with an air current that is blown toward a predetermined area collides with the plurality of stopper pieces 130, and as a result, the dust or the like is suppressed from being blown into the predetermined area. In addition, a vehicle moving into or out of a predetermined area traverses while stepping on the blow-in suppressor 100 . However, since the stopper piece 130 is elastically deformed, damage to the stopper piece 130 is suppressed. Furthermore, of the plurality of stopper pieces 130, only the stopper piece 130 that has been stepped on by a vehicle tire or the like is deformed, so damage to the entire stopper portion is suppressed.
　また、ベース（複数のベース片１２０）は、複数のストッパ片１３０にわたって連続的に延びており、前後方向に貫く直線状の隙間がない。このため、例えば砂等の微小なゴミ等がベース片１２０に形成された隙間を介して所定の敷地内に侵入することを抑制することができる。 In addition, the base (plurality of base pieces 120) extends continuously over the plurality of stopper pieces 130, and there is no linear gap penetrating in the front-rear direction. Therefore, it is possible to prevent fine dust such as sand from entering the predetermined site through the gap formed in the base piece 120 .
　本実施形態では、互いに隣り合うストッパ片１３０同士について、上端側における並び方向（Ｘ軸方向）の第１の隙間は、基端側（ベース片１２０側）における並び方向の第２の隙間よりも広い（隙間Ｓ参照）。本実施形態によれば、ストッパ片１３０同士の隙間が、ストッパ片１３０の上下方向の全長にわたって均一である構成に比べて、ゴミ等の侵入を抑制しつつ、踏まれたときに互いに隣り合うストッパ片１３０同士が干渉することを抑制できる。 In this embodiment, for the stopper pieces 130 adjacent to each other, the first gap in the row direction (X-axis direction) on the upper end side is larger than the second gap in the row direction on the base end side (base piece 120 side). Wide (see gap S). According to the present embodiment, compared to a configuration in which the gaps between the stopper pieces 130 are uniform over the entire length of the stopper pieces 130 in the vertical direction, the intrusion of dust and the like is suppressed, and the stoppers adjacent to each other when stepped on are prevented from entering. Interference between pieces 130 can be suppressed.
　本実施形態では、一のベース片１２０の第１の凸部１２６を、他のベース片１２０の第１の凹部１２８に挿入することにより、一のベース片１２０と他のベース片１２０とが着脱可能に連結されている。このような構成により、互いに隣り合うベース片１２０同士は、前後方向（Ｙ軸方向）視で、互いに重なり合う部分を有している。要するに、互いに隣り合うベース片１２０同士の間には、前後方向に直線状に貫く隙間の発生が抑制されている。これにより、本実施形態によれば、吹き込み抑制具１００を複数に分割可能としつつ、砂等の微小なゴミ等がベース片１２０間に形成された隙間を介して所定の敷地内に侵入することを抑制することができる。なお、吹き込み抑制具１００が複数に分割可能なので、例えば、所定の領域の出入り口のサイズに合わせた長さで吹き込み抑制具１００を配置することができる。 In this embodiment, the one base piece 120 and the other base piece 120 can be attached and detached by inserting the first convex portion 126 of one base piece 120 into the first concave portion 128 of the other base piece 120 . connected as possible. With such a configuration, the base pieces 120 adjacent to each other have portions that overlap each other when viewed in the front-rear direction (Y-axis direction). In short, the generation of gaps linearly penetrating in the front-rear direction is suppressed between the base pieces 120 adjacent to each other. As a result, according to the present embodiment, the blow suppressor 100 can be divided into a plurality of pieces, and fine dust such as sand can be prevented from entering the predetermined site through the gaps formed between the base pieces 120. can be suppressed. In addition, since the blow-in suppressor 100 can be divided into a plurality of parts, the blow-in suppressor 100 can be arranged with a length that matches the size of the doorway of a predetermined area, for example.
　本実施形態では、ベース片１２０は、床面Ｍに対して着脱可能な構成を有している。これにより、例えば落ち葉が少ない季節など、吹き込み抑制具１００を使用しなくてもよい時期に、吹き込み抑制具１００を床面から取り外すことができる。 In this embodiment, the base piece 120 has a configuration that can be attached to and detached from the floor surface M. As a result, the blow-in suppressor 100 can be removed from the floor surface when the blow-in suppressor 100 does not need to be used, such as in a season when there are few fallen leaves.
Ｂ．第２実施形態：
Ｂ－１．吹き込み抑制具１００Ａの構成：
　図３は、第２実施形態における吹き込み抑制具１００Ａの外観構成を示す斜視図であり、図４は、吹き込み抑制具１００ＡのＹＺ側面構成を示す説明図である。 B. Second embodiment:
B-1. Configuration of the blow suppressor 100A:
FIG. 3 is a perspective view showing the external configuration of the blow suppressor 100A in the second embodiment, and FIG. 4 is an explanatory view showing the YZ side configuration of the blow suppressor 100A.
　図３に示すように、吹き込み抑制具１００Ａは、複数のストッパ部品１１０Ａが所定方向（図３では、Ｘ軸方向、以下、「並び方向」という）に沿って並べて配置された構成である。後述するように、並び方向に互いに隣り合うストッパ部品１１０Ａ同士は、着脱可能とされている。 As shown in FIG. 3, the blowing suppressor 100A has a configuration in which a plurality of stopper parts 110A are arranged side by side along a predetermined direction (in FIG. 3, the X-axis direction, hereinafter referred to as "arrangement direction"). As will be described later, the stopper parts 110A that are adjacent to each other in the alignment direction are detachable.
　複数のストッパ部品１１０Ａは、いずれも同じ形状である。具体的には、ストッパ部品１１０Ａは、ベース片１２０Ａと、ストッパ片１３０Ａとを有している。 All of the plurality of stopper parts 110A have the same shape. Specifically, the stopper component 110A has a base piece 120A and a stopper piece 130A.
　ベース片１２０Ａは、並び方向に延びる長方形状の板状部分である。ベース片１２０Ａの下面１２４Ａが床面Ｍ（地面でもよい）に対向するように配置される（図４参照）。ベース片１２０Ａの上面は、接合部分１２２Ａと、一対のテーパ面部分１２３Ａとを含んでいる。接合部分１２２Ａとテーパ面部分１２３Ａとは、いずれも並び方向に沿って延びている面である。上下方向視で、接合部分１２２Ａは、一対のテーパ面部分１２３Ａの間に配置されている。テーパ面部分１２３Ａは、接合部分１２２Ａから離れるほど下面１２４Ａに近づくように下方に傾斜している傾斜面である。なお、一対のテーパ面部分１２３Ａのいずれか一方は、床面Ｍに平行な水平面部分であってもよい。 The base piece 120A is a rectangular plate-like portion extending in the row direction. The bottom surface 124A of the base piece 120A is arranged to face the floor surface M (or the ground) (see FIG. 4). The upper surface of the base piece 120A includes a joint portion 122A and a pair of tapered surface portions 123A. Both the joint portion 122A and the tapered surface portion 123A are surfaces extending along the alignment direction. As viewed in the vertical direction, the joint portion 122A is arranged between the pair of tapered surface portions 123A. 123 A of taper surface parts are inclined surfaces which incline downward so that the lower surface 124A may be approached, so that it leaves|separates from 122 A of joint parts. Either one of the pair of tapered surface portions 123A may be a horizontal surface portion parallel to the floor surface M.
　ストッパ片１３０Ａは、ベース片１２０Ａの上面に設けられている。具体的には、ベース片１２０Ａの接合部分１２２Ａに接合されている。ストッパ片１３０Ａは、ベース片１２０Ａの接合部分１２２Ａから上方に突出し、かつ、並び方向に沿って延びるとともに、弾性変形可能な平板状である。ストッパ片１３０Ａは、ストッパ片１３０Ａの下端側を起点として、ストッパ片１３０Ａの上端側が並び方向に直交する方向（Ｙ軸方向　以下、「前後方向」という）に変位するように弾性変形可能になっている。複数のストッパ片１３０Ａは、特許請求の範囲におけるストッパの一例である。 The stopper piece 130A is provided on the upper surface of the base piece 120A. Specifically, it is joined to the joint portion 122A of the base piece 120A. The stopper piece 130A protrudes upward from the joint portion 122A of the base piece 120A, extends along the alignment direction, and has an elastically deformable flat plate shape. The stopper piece 130A is elastically deformable so that the upper end side of the stopper piece 130A is displaced in a direction perpendicular to the direction in which the stopper piece 130A is arranged (hereinafter referred to as the "front-rear direction"), starting from the lower end side of the stopper piece 130A. there is A plurality of stopper pieces 130A is an example of a stopper in the claims.
　ストッパ片１３０Ａには、ストッパ片１３０Ａを貫通する複数の孔Ｐが形成されている。複数の孔Ｐは、開口形状が互いに略同一であり、かつ、開口面積が互いに略同一である。なお、複数の孔Ｐの少なくとも一部は、開口形状と開口面積との少なくとも一方が互いに異なってもよい。また、孔Ｐの開口形状は、円形に限らず、楕円、多角形などでもよい。また、複数の孔Ｐは、ストッパ片１３０Ａにおいて略均一に分散するように配置されている。また、複数の孔Ｐは、互いに等間隔に配置されている。このような構成により、ストッパ片１３０Ａにおける孔Ｐの配置や開口形状のバラツキに起因して意図しない気流が発生することが抑制され、ゴミ等が侵入することを抑制できる。 A plurality of holes P passing through the stopper piece 130A are formed in the stopper piece 130A. The plurality of holes P have substantially the same opening shape and substantially the same opening area. In addition, at least one of the opening shape and the opening area of at least some of the plurality of holes P may be different from each other. Moreover, the shape of the opening of the hole P is not limited to a circle, and may be an ellipse, a polygon, or the like. Also, the plurality of holes P are arranged so as to be substantially uniformly dispersed in the stopper piece 130A. Moreover, the plurality of holes P are arranged at regular intervals. With such a configuration, it is possible to suppress the generation of unintended air currents due to variations in the arrangement of the holes P and the shape of the openings of the stopper pieces 130A, and to suppress the intrusion of dust and the like.
　なお、１つの孔Ｐの開口形状の最大幅は、侵入を抑制したいゴミ等のサイズに応じて適宜設定することが好ましい。１つの孔Ｐの開口形状の最大幅は、例えば、５ｍｍ以上、１０ｍｍ以上、或いは、１５ｍｍ以上でもよい。また、１つの孔Ｐの開口形状の最大幅は、例えば、４０ｍｍ以下、３０ｍｍ以下、或いは、２０ｍｍ以下でもよい。また、１つの孔Ｐの開口形状の最大幅は、ストッパ片１３０Ａの厚さ（例えば４ｍｍ）よりも大きいことが好ましい。また、ストッパ片１３０Ａの上端と、その上端に最も近い孔Ｐとの距離は、１つの孔Ｐの開口形状の最大幅より小さいことが好ましい。また、互いに隣り合う孔Ｐ同士の離間距離は、１つの孔Ｐの開口形状の最大幅より小さいことが好ましい。 It should be noted that the maximum width of the opening shape of one hole P is preferably set as appropriate according to the size of dust or the like whose entry is to be suppressed. The maximum width of the opening shape of one hole P may be, for example, 5 mm or more, 10 mm or more, or 15 mm or more. Also, the maximum width of the opening shape of one hole P may be, for example, 40 mm or less, 30 mm or less, or 20 mm or less. Moreover, it is preferable that the maximum width of the opening shape of one hole P is larger than the thickness (for example, 4 mm) of the stopper piece 130A. Moreover, it is preferable that the distance between the upper end of the stopper piece 130A and the hole P closest to the upper end is smaller than the maximum width of the opening shape of one hole P. Moreover, it is preferable that the distance between the holes P adjacent to each other is smaller than the maximum width of the opening shape of one hole P.
　以下、ストッパ片１３０Ａの面積（ストッパ片１３０Ａの外形の面積）に対する全ての孔Ｐの合計開口面積の割合である開口率を、孔開口率という。孔開口率は、例えば１０％以上、２０％以上、３０％以上、或いは、４０％以上でもよい。また、孔開口率は、例えば７０％以下、６０％以下、５０％以下、或いは、４０％以下でもよい。 Hereinafter, the opening ratio, which is the ratio of the total opening area of all the holes P to the area of the stopper piece 130A (area of the outer shape of the stopper piece 130A), is referred to as hole opening ratio. The aperture ratio may be, for example, 10% or more, 20% or more, 30% or more, or 40% or more. Also, the aperture ratio may be, for example, 70% or less, 60% or less, 50% or less, or 40% or less.
　ストッパ片１３０Ａは、床面Ｍに垂直な方向（図４でＺ軸方向）に対して傾斜している。具体的には、ベース片１２０Ａが床面Ｍに配置された状態で、床面Ｍに沿った方向（図４でＹ軸方向）に対するストッパの角度θは、８５度以下である。ストッパの角度θは、８０度以下、或いは、７５度以下、７０度以下でもよい。また、ストッパの角度θは、５０度以上、５５度以上、６０度以上、或いは、６５度以上でもよい。 The stopper piece 130A is inclined with respect to the direction perpendicular to the floor surface M (the Z-axis direction in FIG. 4). Specifically, when the base piece 120A is placed on the floor surface M, the angle θ of the stopper with respect to the direction along the floor surface M (the Y-axis direction in FIG. 4) is 85 degrees or less. The angle θ of the stopper may be 80 degrees or less, 75 degrees or less, or 70 degrees or less. Also, the angle θ of the stopper may be 50 degrees or more, 55 degrees or more, 60 degrees or more, or 65 degrees or more.
　ストッパ片１３０Ａの並び方向（Ｘ軸方向）の両端には、他のストッパ部品１１０Ａと着脱可能に連結するための凹凸部が形成されている。具体的には、ストッパ片１３０Ａの並び方向の一端には、該並び方向に突出する第１の凸部１２６Ａが形成されている。ストッパ片１３０Ａの並び方向の他端には、該並び方向に窪んだ第１の凹部１２８Ａが形成されている。一のストッパ片１３０Ａの第１の凸部１２６Ａを、他のストッパ片１３０Ａの第１の凹部１２８Ａに挿入することにより、一のストッパ片１３０Ａと他のストッパ片１３０Ａとを連結することができる。なお、ストッパ片１３０Ａは、第１の凸部１２６Ａおよび第１の凹部１２８Ａを有しない構成でもよい。 On both ends of the stopper piece 130A in the direction in which it is arranged (X-axis direction), concave and convex portions are formed for detachably connecting with other stopper parts 110A. Specifically, a first convex portion 126A that protrudes in the alignment direction is formed at one end of the stopper piece 130A in the alignment direction. A first recess 128A recessed in the alignment direction is formed at the other end of the stopper piece 130A in the alignment direction. By inserting the first projection 126A of one stopper piece 130A into the first recess 128A of the other stopper piece 130A, the one stopper piece 130A and the other stopper piece 130A can be connected. Note that the stopper piece 130A may be configured without the first convex portion 126A and the first concave portion 128A.
　なお、ストッパ片１３０Ａは、ベース片１２０Ａよりも柔軟性（弾力性）が高い材料により形成されていることが好ましい。ストッパ片１３０Ａの形成材料は、例えば、中質繊維板（ＭＤＦ（Medium Density Fiberboard））であり、ベース片１２０Ａの形成材料は、例えば生分解性プラスチック（ＰＬＡ（Poly-Lactic Acid））である。 It should be noted that the stopper piece 130A is preferably made of a material having higher flexibility (elasticity) than the base piece 120A. The forming material of the stopper piece 130A is, for example, a medium density fiberboard (MDF (Medium Density Fiberboard)), and the forming material of the base piece 120A is, for example, a biodegradable plastic (PLA (Poly-Lactic Acid)).
　なお、吹き込み抑制具１００Ａの性能評価方法の一例として、次の防塵実験を行った。気流を通過させる風洞測定部を備える実験装置を用いる。吹き込み抑制具１００Ａのサンプルを風洞測定部内に配置し、風洞測定部内の気流の流れを、スモークワイヤ法により可視化する。スモークワイヤ法は、ニクロム線ワイヤに流動パラフィンを塗布して交流電圧をかけることで煙を発生させる方法である。煙を可視化するための光源には、レーザーシートを用いる。風洞測定部内の気流の流速は、４～８ｍ／ｓ程度とし、気流とともに人工葉Ｌを流した。人工葉Ｌは、紙で形成した（重さ０１１ｇ、長手寸法６ｃｍ、短手寸法２．２ｃｍ）。可視化された煙と人工葉Ｌとをハイスピードカメラで撮像する。ハイスピードカメラは、例えばモノクロで、撮影速度は２０００ｆｐｓとした。サンプルとしては、孔Ｐの有無と、孔開口率と、ストッパの角度θと、１つの孔Ｐの開口形状の最大幅との少なくとも１つが互いに異なる複数の吹き込み抑制具を準備した。この結果、孔開口率が高いほど、人工葉Ｌがサンプルを乗り越えることが抑制されることが分かった。また、ストッパの角度θが７０度に近いほど、人工葉Ｌがサンプルを乗り越えることが抑制されることが分かった。 As an example of the method for evaluating the performance of the blow suppressor 100A, the following dustproof experiment was conducted. An experimental setup with a wind tunnel measuring section through which airflow is passed is used. A sample of the blow suppressor 100A is placed in the wind tunnel measurement section, and the flow of the airflow in the wind tunnel measurement section is visualized by the smoke wire method. The smoke wire method is a method of applying liquid paraffin to a nichrome wire and applying an alternating voltage to generate smoke. A laser sheet is used as the light source for visualizing the smoke. The velocity of the airflow in the wind tunnel measurement section was set to about 4 to 8 m/s, and the artificial leaf L was flowed along with the airflow. The artificial leaf L was made of paper (weight: 011 g, length: 6 cm, width: 2.2 cm). The visualized smoke and artificial leaf L are imaged with a high-speed camera. The high-speed camera is, for example, monochrome, and the photographing speed is 2000 fps. As samples, a plurality of blow-in suppressors having different at least one of the presence/absence of holes P, the aperture ratio, the angle θ of the stopper, and the maximum width of the opening shape of one hole P were prepared. As a result, it was found that the higher the pore opening ratio, the more the artificial leaf L was inhibited from climbing over the sample. Moreover, it was found that the closer the angle θ of the stopper was to 70 degrees, the more the artificial leaves L were suppressed from climbing over the sample.
Ｂ－２．本実施形態の効果：
　本実施形態に係る吹き込み抑制具１００Ａでは、ストッパ片１３０Ａに複数の孔Ｐが形成されている（図３参照）。吹き込み抑制具１００Ａに向かう気流Ｗのうち、一部の気流Ｗ１が複数の孔Ｐを通過して直進し、残りの気流Ｗ２が上昇気流となる。人工葉Ｌを舞い上がらせる上昇気流が低減するため、人工葉Ｌが吹き込み抑制具１００Ａを超えて侵入することを効果的に抑制することができる。さらに、ストッパ片１３０Ａは、床面Ｍに垂直な方向（図４でＺ軸方向　向かい風）に対して傾斜している。このため、人工葉Ｌが吹き込み抑制具１００Ａを超えて侵入することを、より効果的に抑制することができる。 B-2. Effect of this embodiment:
In the blow suppressor 100A according to this embodiment, a plurality of holes P are formed in the stopper piece 130A (see FIG. 3). Of the airflow W directed toward the blow suppressor 100A, a part of the airflow W1 passes through the plurality of holes P and goes straight, and the remaining airflow W2 becomes an ascending airflow. Since the updraft that causes the artificial leaves L to soar is reduced, it is possible to effectively prevent the artificial leaves L from exceeding the blow suppressor 100A and entering. Further, the stopper piece 130A is inclined with respect to a direction perpendicular to the floor surface M (Z-axis direction in FIG. 4, headwind). Therefore, it is possible to more effectively suppress the artificial leaf L from entering beyond the blow suppressor 100A.
Ｃ．変形例：
　本明細書で開示される技術は、上述の実施形態に限られるものではなく、その要旨を逸脱しない範囲において種々の形態に変形することができ、例えば次のような変形も可能である。 C. Variant:
The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified in various forms without departing from the scope of the invention. For example, the following modifications are possible.
　上記実施形態では、吹き込み抑制具１００，１００Ａ（複数のストッパ部品１１０，１１０Ａ）は、直線方向（Ｘ軸方向）に延びる構成であったが、これに限らず、例えば円周方向（円弧状）に延びる構成やクランク状に延びる構成でもよい。要するには、第１の方向は、直線方向に限らず、曲線方向やクランク状等でもよい。 In the above-described embodiment, the blow suppressors 100, 100A (the plurality of stopper parts 110, 110A) are configured to extend in the linear direction (X-axis direction), but are not limited to this, and may A configuration extending in a straight direction or a configuration extending in a crank shape may be used. In short, the first direction is not limited to a linear direction, but may be a curved direction, a crank shape, or the like.
　上記実施形態では、ベースとして、複数のベース片１２０，１２０Ａが連結された構成であったが、これに限らず、並び方向に延びる板状部材単体でもよい。また、上記第１実施形態において、複数のベース片１２０の着脱のための構成は、第１の凸部１２６と第１の凹部１２８との係合に限らず、例えばマグネット等の磁力による構成や、挿入凸部と挿入凹部の圧入による構成などでもよい。 In the above embodiment, a plurality of base pieces 120 and 120A are connected as a base, but this is not limiting, and a single plate member extending in the row direction may be used. In the above-described first embodiment, the configuration for attaching and detaching the plurality of base pieces 120 is not limited to the engagement between the first convex portion 126 and the first concave portion 128. For example, a configuration using magnetic force such as a magnet, Alternatively, the insertion protrusion and the insertion recess may be press-fitted.
　上記実施形態では、ストッパとして、複数のストッパ片１３０，１３０Ａが連結された構成であったが、これに限らず、並び方向に延びる板状部材単体でもよい。また、上記実施形態では、複数のストッパ部品１１０，１１０Ａは、いずれも同じ形状であったが、複数のストッパ部品１１０，１１０Ａの少なくとも一部は、互いに異なる形状でもよい。例えば、一のストッパ部品１１０，１１０Ａ（あるいは、ベース片１２０，１２０Ａやストッパ片１３０，１３０Ａ）の並び方向の長さが、他のストッパ部品１１０，１１０Ａ（あるいは、ベース片１２０，１２０Ａやストッパ片１３０，１３０Ａ）の並び方向の長さよりも長くてもよい。 In the above embodiment, a plurality of stopper pieces 130 and 130A are connected as stoppers, but this is not limitative, and a single plate member extending in the row direction may be used. Further, in the above embodiment, the plurality of stopper components 110, 110A have the same shape, but at least some of the plurality of stopper components 110, 110A may have different shapes. For example, the length of one stopper component 110, 110A (or base piece 120, 120A or stopper piece 130, 130A) in the direction of arrangement is equal to that of another stopper component 110, 110A (or base piece 120, 120A or stopper piece). 130, 130A) in the alignment direction.
　上記第１実施形態において、ストッパ片１３０に１または複数の孔を形成してもよい。この構成では、ストッパ片１３０に向かって吹き付ける風の一部が、ストッパ片１３０に形成された孔を通り抜ける気流が形成される。このため、これにより、ストッパ片１３０に孔が形成されていない構成に比べて、枯れ葉などの軽いゴミ等が上方に舞い上がってストッパ片１３０を超えて侵入することを抑制することができる。なお、ストッパ片１３０に形成される孔の開口率は、ストッパ片１３０の基端側よりも上端側の方が高いことが好ましい。なお、ストッパ片１３０の上端側だけに孔や切り欠きが形成されていてもよい。 In the first embodiment described above, one or more holes may be formed in the stopper piece 130 . In this configuration, part of the wind blown toward the stopper piece 130 passes through the hole formed in the stopper piece 130 to form an air current. Therefore, compared to a configuration in which the stopper piece 130 is not formed with a hole, it is possible to suppress light dust such as dead leaves from rising upward and entering beyond the stopper piece 130. - 特許庁It is preferable that the aperture ratio of the holes formed in the stopper piece 130 is higher on the upper end side than on the base end side of the stopper piece 130 . A hole or a notch may be formed only on the upper end side of the stopper piece 130 .
　上記実施形態において、ベース（ベース片１２０，１２０Ａ）の内、ストッパ（ストッパ片１３０，１３０Ａ）に直交する方向（前後方向）に突出する一対の突出部分（テーパ面部分１２３，１２３Ａ）の突出長さは同じでもよいが異なってもよい。例えば、ストッパとの角度が鈍角となる突出部分（例えば図４の左側のテーパ面部分１２３Ａ）の突出長さが、ストッパとの角度が鋭角となる突出部分（例えば図４の右側のテーパ面部分１２３Ａ）の突出長さよりも長くてもよい。この構成によれば、吹き込み抑制具１００，１００Ａ全体の軽量化を図りつつ、風の吹き付けにより吹き込み抑制具１００，１００Ａが横転することを抑制できる。 In the above embodiment, the projection length of the pair of projecting portions (tapered surface portions 123, 123A) of the base ( base pieces 120, 120A) projecting in the direction (front-rear direction) orthogonal to the stoppers ( stopper pieces 130, 130A) The depth may be the same or may be different. For example, the projection length of the projection having an obtuse angle with the stopper (for example, the tapered surface portion 123A on the left side in FIG. 4) can 123A). According to this configuration, it is possible to reduce the overall weight of the blow suppressors 100 and 100A, and prevent the blow suppressors 100 and 100A from overturning due to the blown wind.
　上記第２実施形態において、ストッパの角度θは、９０度でもよい。 In the second embodiment, the angle θ of the stopper may be 90 degrees.
　１００，１００Ａ：吹き込み抑制具　１１０，１１０Ａ：ストッパ部品　１２０，１２０Ａ：ベース片　１２２：平面部分　１２２Ａ：接合部分　１２３，１２３Ａ：テーパ面部分　１２４，１２４Ａ：下面　１２６，１２６Ａ：第１の凸部　１２７：マグネット　１２８，１２８Ａ：第１の凹部　１２９：第２の凸部　１３０，１３０Ａ：ストッパ片　Ｍ：床面　Ｎ１：第２の凹部　Ｎ：金属板　Ｓ：隙間 100, 100A: Blow-in suppressor 110, 110A: Stopper part 120, 120A: Base piece 122: Plane portion 122A: Joint portion 123, 123A: Tapered surface portion 124, 124A: Lower surface 126, 126A: First convex portion 127: Magnet 128, 128A: First concave portion 129: Second convex portion 130, 130A: Stopper piece M: Floor surface N1: Second concave portion N: Metal plate S: Gap

Claims (9)

  1. 　床面に沿って配置される板状のベースと、
    　前記ベースの上面から上方に突出し、かつ、第１の方向に沿って延びるとともに、弾性変形可能な平板状のストッパと、を備える、
    　吹き込み抑制具。     a plate-shaped base arranged along the floor;
    an elastically deformable plate-shaped stopper that protrudes upward from the upper surface of the base, extends along a first direction, and
    Blowout suppressor.
  2. 　請求項１に記載の吹き込み抑制具であって、
    　前記ストッパには、前記ストッパを貫通する複数の孔が形成されている、吹き込み抑制具。     The blow suppressor according to claim 1,
    A blow-in restrainer, wherein the stopper is formed with a plurality of holes penetrating through the stopper.
  3. 　請求項２に記載の吹き込み抑制具であって、
    　前記ストッパの面積に対する前記複数の孔の合計開口面積の割合である開口率は、５０％以下である、吹き込み抑制具。     The blow suppressor according to claim 2,
    The blow-in suppressor, wherein an opening ratio, which is a ratio of the total opening area of the plurality of holes to the area of the stopper, is 50% or less.
  4. 　請求項１または請求項２に記載の吹き込み抑制具であって、
    　前記ベースが前記床面に配置された状態で、前記床面に沿った方向に対する前記ストッパの角度は、８５度以下である、吹き込み抑制具。     The blow suppressor according to claim 1 or claim 2,
    The blowing suppressor, wherein the angle of the stopper with respect to the direction along the floor surface is 85 degrees or less when the base is placed on the floor surface.
  5. 　請求項４に記載の吹き込み抑制具であって、
    　前記ストッパの前記角度は、６０度以上、かつ、８０度以下である、吹き込み抑制具。     The blow suppressor according to claim 4,
    The blow suppressor, wherein the angle of the stopper is 60 degrees or more and 80 degrees or less.
  6. 　請求項１に記載の吹き込み抑制具であって、
    　前記ストッパは、前記第１の方向に沿って並ぶ複数のストッパ片を含む、吹き込み抑制具。     The blow suppressor according to claim 1,
    The blow suppressor, wherein the stopper includes a plurality of stopper pieces arranged along the first direction.
  7. 　請求項６に記載の吹き込み抑制具であって、
    　前記複数のストッパ片のうち、少なくとも、互いに隣り合う１組のストッパ片同士について、突出先端における前記第１の方向の第１の隙間は、前記ベース側における前記第１の方向の第２の隙間よりも広い、吹き込み抑制具。     The blow suppressor according to claim 6,
    Among the plurality of stopper pieces, for at least one set of stopper pieces adjacent to each other, the first gap in the first direction at the projecting tip end is equal to the second gap in the first direction on the base side. Blow restraint wider than
  8. 　請求項６に記載の吹き込み抑制具であって、
    　前記ベースは、前記複数のストッパ片のうち、少なくとも、互いに隣り合う１組のストッパ片同士の間で着脱可能な第１のベース片と第２のベース片とを有しており、
    　前記第１のベース片と前記第２のベース片とは、前記第１の方向に垂直であり、かつ、前記床面に平行な第２の方向視で、互いに重なり合う部分を有している、吹き込み抑制具。     The blow suppressor according to claim 6,
    the base has at least a first base piece and a second base piece detachable between a pair of mutually adjacent stopper pieces among the plurality of stopper pieces,
    The first base piece and the second base piece have portions that overlap each other when viewed in a second direction that is perpendicular to the first direction and parallel to the floor surface, Blowout suppressor.
  9. 　請求項１に記載の吹き込み抑制具であって、
    　前記ベースは、前記床面に対して着脱可能な構成を有している、吹き込み抑制具。     The blow suppressor according to claim 1,
    The blow suppressor, wherein the base is detachable from the floor surface.
PCT/JP2023/003242 2022-02-02 2023-02-01 Blow-in refrainer WO2023149480A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0270010U (en) * 1988-11-11 1990-05-28
JPH09217308A (en) * 1996-02-13 1997-08-19 Daikichi Suematsu Concrete block
JP2002371524A (en) * 2001-04-10 2002-12-26 Fukuoka Highway Engineering Kk Signpost for safety
JP2010532835A (en) * 2007-07-06 2010-10-14 セルボンド リミテッド barricade
JP2011080353A (en) * 2010-10-19 2011-04-21 Takashi Tokuno Curbstone mounted with plate having elasticity returning to original state when bent
JP2012188843A (en) * 2011-03-10 2012-10-04 Metropolitan Expressway Co Ltd Construction regulating equipment
JP2021102882A (en) * 2019-12-25 2021-07-15 トヨタ自動車株式会社 Sidewalk-roadway boundary block

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0270010U (en) * 1988-11-11 1990-05-28
JPH09217308A (en) * 1996-02-13 1997-08-19 Daikichi Suematsu Concrete block
JP2002371524A (en) * 2001-04-10 2002-12-26 Fukuoka Highway Engineering Kk Signpost for safety
JP2010532835A (en) * 2007-07-06 2010-10-14 セルボンド リミテッド barricade
JP2011080353A (en) * 2010-10-19 2011-04-21 Takashi Tokuno Curbstone mounted with plate having elasticity returning to original state when bent
JP2012188843A (en) * 2011-03-10 2012-10-04 Metropolitan Expressway Co Ltd Construction regulating equipment
JP2021102882A (en) * 2019-12-25 2021-07-15 トヨタ自動車株式会社 Sidewalk-roadway boundary block

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