JP3110242U - Hollow airfoil snowboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the lack of mass productivity and increase in manufacturing cost.
SOLUTION: In a hollow wing type windproof snow plate constituting a windproof snow fence and having a cross-sectional shape perpendicular to the horizontal direction being a hollow wing, a hollow wing composed of an upper curved plate 11 and a lower curved plate 12 is provided. The shape plate 1, the plurality of partition ribs 2 and the reinforcing ribs 5 formed inside the hollow airfoil plate 1 are made of thermoplastic resin, and the separating rib 2 allows the reinforcing rib forming portion 3 and the metal girder insertion portion 4 to A plurality of metal girders 6 are formed and inserted into the metal girder insertion portion 4.
[Selection] Figure 1

Description

  The present invention relates to a hollow wing type windbreak snowboard constituting a windbreak snow fence belonging to a blow-off method installed in a cold and snowfall strong wind region.

  The windbreak snow fence is a fixed or vertical arrangement of several windbreak snowboards that are flat or curved between struts erected at regular intervals, with a certain inclination angle, and fixed upside down. The inflow wind snow is guided down the leeward side, and the snow on the ground is blown away.

  For flat windproof snowboards, corrugated steel sheets with irregularities in the length direction are used to ensure strength against light pressure load and weight reduction, or cross-section reinforcement is applied to thin steel sheets using hollow steel pipes and shaped steel in the length direction. The type that has been used has been adopted for a long time.

  Windbreaking snowboards with curved or airfoil cross-sections have recently been used as means for aerodynamically smoothly turning inflowing snow to the leeward side to improve performance over the previously described planar method. This kind of windproof snowboard bent with a simple plate material has insufficient torsional rigidity and may cause abnormal vibration such as flutter in strong winds. As means for preventing this, a wind-resistant snow plate having a hollow airfoil cross section constituted by a hollow airfoil plate and an internal reinforcing girder found in an airfoil cross section is employed.

  These windproof snowboards having a cross section of hollow airfoil are reinforced with a metal hollow airfoil plate and a Z-shaped metal girder (Japanese Patent Laid-Open No. 10-338909), and reinforcement with a metal hollow airfoil plate and an assembly overlap portion (utility model). Registration No. 3103653), FRP hollow airfoil plate and reinforcement with FRP girder (Japanese Patent Laid-Open No. 2002-22136), etc., but it is structurally complex, lacks mass productivity, and increases manufacturing costs is there.

JP 10-338909 A Utility Model Registration No. 3103653 JP 2003-000000 A

  The problem to be solved is that it lacks mass productivity and increases the manufacturing cost.

  This invention is a hollow wing-shaped windproof snow plate which is a hollow wing whose cross-sectional shape perpendicular to the horizontal direction is a hollow wing, and which is composed of an upper curved plate and a lower curved plate. The plurality of partition ribs and reinforcing ribs formed inside the hollow airfoil plate are made of thermoplastic resin, and a plurality of metal girders are inserted into the hollow airfoil plate. It is.

In such a configuration, the hollow airfoil plate 1, the isolation rib 2 and the reinforcing rib 5 are formed by extrusion molding of a thermoplastic resin together with a gap adjustment protrusion described later. Therefore, according to this device, it is possible to manufacture a relatively complex hollow wing type windbreak snowboard in mass production, to achieve mass productivity and cost reduction, and to achieve the aerodynamic necessity of the hollow airfoil type windbreak snowboard. The effect that performance can be maintained is obtained.

  FIG. 1 is a sectional structural view showing an embodiment of the present invention. 1 is a hollow airfoil plate forming upper and lower surfaces of a blade plate, 2 is an isolation rib, 3 is a reinforcing rib forming portion, and 4 is a metal girder insertion And 5 are reinforcing ribs, and 6 is a metal girder.

  The hollow airfoil plate 1 is composed of an upper curved plate 11 and a lower curved plate 12 to form the upper and lower surfaces of the blade plate, the cross-sectional shape perpendicular to the horizontal direction is a hollow blade, and thermoplasticity. Made of resin.

The separating rib 2 is provided with a plurality of different intervals between the upper curved plate 11 and the lower curved plate 12 and is made of a thermoplastic resin. A plurality of reinforcing rib forming portions 3 partitioned by the separation ribs 2 at a long interval and metal girder insertion portions 4 partitioned by a short interval of the separation ribs 2 are formed by the separation ribs 2. Although the isolation rib 2 is I-shaped, it is not limited to this.

  The reinforcing rib 5 is erected between the upper curved plate 11 and the lower curved plate 12 in the reinforcing rib forming portion 3 and is made of a thermoplastic resin. In the hollow airfoil plate 1, the airfoil hollow cross section is maintained by the separating rib 2 and the reinforcing rib 5. The reinforcing rib 5 has an inverted V shape, but is not limited thereto.

  The hollow airfoil plate 1, the isolation rib 2, and the reinforcing rib 5 are formed by extrusion molding together with a gap adjustment protrusion described later and cutting to a required length. By extrusion molding of thermoplastic resin, it is possible to manufacture relatively complex hollow wing type windbreak snowboards in mass production, mass production and cost reduction can be achieved, and the aerodynamic necessity of hollow airfoil type windbreak snowboards Performance can be maintained.

  The metal girder 6 is inserted into the metal girder insertion part 4 and fixed in the metal girder insertion part 4. Mounting metal fittings (not shown) are attached to both ends of the metal girder 6, and the hollow airfoil windbreak snowboard 1 is fixed to a pillar (not shown) via the metal fittings 6.

  Since the metal girder 6 acts as a girder and shares most of the wind resistance strength against the wind pressure load acting on the hollow wing-shaped windbreak snowboard, wind resistance, durability, and reliability are improved.

  As the metal beam 6, a closed hollow cross-section material such as a round pipe and a square pipe is used. Closed hollow cross-section materials have the characteristics of significantly bending, twisting, and rigidity higher than open cross-section materials such as L-shaped, Z-shaped, and H-shaped. This prevents damage caused by abnormal vibration (flutter) caused by the twisting phenomenon, and contributes to improvement of safety and weight reduction.

  As shown in FIG. 2, a plurality of thermoplastic resin gap adjustment protrusions 7 are provided on the upper curved plate 11 and the lower curved plate 12 in the metal girder insertion portion 4. The gap adjustment protrusion 7 absorbs a dimensional error in the manufacturing process of extrusion molding, reduces the frictional resistance when the metal girder 6 is inserted into the metal girder insertion portion 4, and facilitates the work. After inserting the metal girder 6, the gap between the outer periphery of the metal girder 6 and the metal girder insertion part 4 is filled with a gap filler 8, for example, a liquid injection hardening filler, so that the metal girder 6 is formed into a hollow airfoil plate. Fix to 1. The gap adjusting protrusions 7 may be provided on both sides of the separating rib 2 in the metal girder insertion portion 4.

1 is a cross-sectional structure diagram showing one embodiment of the present invention. It is an expanded sectional structure figure of the metal girder penetration part which constitutes this device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hollow airfoil board which forms a wing board upper and lower surface 2 Isolation rib 3 Reinforcement rib formation part 4 Metal girder insertion part 5 Reinforcement rib 6 Metal girder 7 Gap adjustment protrusion 8 Gap filler

Claims (5)

  A hollow wing-shaped windbreaking snow plate that has a cross-sectional shape that is a hollow wing and that constitutes a windbreak snow fence, the hollow wingplate composed of an upper curved plate and a lower curved plate, the hollow wing A plurality of partition ribs and reinforcing ribs formed inside the shape plate are made of a thermoplastic resin, and a plurality of metal girders are inserted into the inside of the hollow air shape plate. Board   2. The hollow wing-shaped windbreak snowboard according to claim 1, wherein the separation ribs are erected at a plurality of different intervals between the upper curved plate and the lower curved plate.   The hollow airfoil windshield according to claim 1 or 2, wherein a plurality of reinforcing rib forming portions and metal girder insertion portions are formed by the separating ribs.   The hollow airfoil windshield according to claim 3, wherein a plurality of spacing adjustment protrusions are provided on the metal girder insertion portion. The hollow airfoil windshield according to any one of claims 1 to 4, wherein the metal girder is a closed hollow section member.

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