JP2001323421A - Snow accretion preventive structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently remove ice and snow clinging to the horizontal members of a road guide sign. SOLUTION: In this snow accretion preventive structure in which a roof member is installed over the road guide sign 1 via cover the road guide sign 1, the roof member comprising a frame 21 with a film 22 stretched thereon is swingably supported by the post 11 via a mounting fulcrum 30 in such a manner that its oscillating angle is regulated by an oscillating angle regulating member 40 provided between the roof member and the post 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow prevention structure, and more particularly, to a snow prevention structure capable of constantly removing ice and snow attached to the surface of a road information sign or the like installed in a heavy snowfall area.

[0002]

2. Description of the Related Art Conventionally, in heavy snowfall areas in which snow has been accumulated throughout the winter period, snow that has fallen falls on solid roads of road information signs installed above roads on arterial roads and the like, and solidifies.
If the temperature rises during the day, it may fall as a lump on the road surface or on a passing vehicle, possibly leading to an accident, which hinders traffic safety. In order to solve this problem, various snow accumulation preventing structures have been proposed.

[0003] In many cases, this type of snow-prevention structure is installed in a roof-like manner above a sign by a support or the like so as not to impair the visibility of the road information sign from a driver. Examples of the proposed structure for preventing snow accretion include those having the following features. (1) Raised snowboard A snowboard made of an aluminum plate is placed almost vertically on the upper part of the sign, and the ice and snow that has arrived on the snowboard is dropped by gravity. (2) Snow-prevention plate with heater A surface heat sheet is attached to the back of the snow-prevention plate installed on the roof to raise the temperature of the snow-prevention plate and to melt the snow at the boundary with the snow-covered area. Drop. (3) Vibration-type snow accretion prevention plate Attach the snow accretion prevention plate to a sign frame or the like via a rubber joint, etc., and drive the self-oscillation motor attached to the snow accretion prevention plate to vibrate the snow accumulation prevention plate to cause ice and snow Drop. (4) Special coating Fluororesin coating, titanium oxide coating, etc. are applied to the surface of the snow-prevention plate to reduce the surface friction coefficient, enhance the sliding effect, and slide down ice and snow. (5) A snow prevention plate using a film material A film material is stretched on a frame, and ice and snow falling on the film surface is dropped using fluttering of the film material due to a cold.

[0004]

However, each of the above-mentioned means for preventing snow accretion has the following problems in individual methods. (1) Raised snowboards Since the boards are provided almost vertically above the sign, the found area becomes large, which is not desirable from the aspect of design, and measures against wind loads are also required. (2) Snow-prevention plate with heater Electric heating expenses are required for operation, and the cost disadvantage is great. (3) Vibration-type snow accumulation prevention plate Maintenance of the motor is required, and it is necessary to prevent the connection member from loosening due to the influence of vibration. (4) Special painting It is necessary to repaint for maintenance. (5) Snow accumulation prevention plate using film material Since freezing and thawing of snow accretion are repeated on the film material surface, it is necessary to consider the weather resistance of the film material, and there is a risk of damage due to material deterioration.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a snow-prevention structure having a simple structure and durability, and capable of efficiently removing snow and ice that has arrived. It is in.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is a snow prevention structure which is installed via a support above a road sign so that a roof member covers the road sign. The roof member is attached to the support in a state where the roof surface is formed of a film material stretched over the frame frame and the deflection angle is controlled by a deflection angle regulating member provided between the roof member and the support. It is swingably supported via a fulcrum.

As the film material, it is preferable to use a film material in which a glass fiber base cloth is coated with an ethylene tetrafluoride resin.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a snow prevention structure according to an embodiment of the present invention. FIG. 1 is a perspective view showing a schematic configuration of a snow prevention structure of the present invention. FIG. 2 is a side view showing the snow accumulation preventing structure 10 in a state where there is snow on the roof from the side. The snow accumulation preventing structure 10 has a two-sided roof shape with a one-sided slope of about 35 °, and a cross member 2 for attaching a sign board is mounted above a conventional road sign board 1 (hereinafter, referred to as a sign board 1). It is attached using. As a result, snow is not directly deposited on the sign board. This sign board is attached to a cross member 2 made of a steel pipe provided on an upper part of a sign post 3 erected on the road so as to be inclined slightly downward through a mounting hardware 4 so as to face the road surface. ing. Further, the column 11 of the snow accumulation preventing structure 10 is fixed to the cross member 2 via a mounting hardware (not shown).

The snow-prevention structure 10 includes a support 11 and a support 1.
1 and a roof portion 20 having a support beam 12 supported via a rotating portion 30. As shown in FIG. 1 and FIG. 2, the roof portion 20 has a main frame 21 formed by joining shaped steel, and a film material 22 is stretched in the frame of the main frame 21. I have. The frame 21 is
An outer frame 21A that forms a roof shape and several ribs (not shown) for stiffening the outer frame 21A are provided, and a film material 22 is stretched so as to cover the outer frame 21A from the outside.

In the present embodiment, as the film material 22, a class A film material in which a glass fiber woven fabric is coated with a tetrafluoroethylene resin is used. As this coating material, in addition to tetrafluoroethylene resin, vinyl chloride,
Chloroprene rubber, chlorosulfonated polyethylene rubber, polyamide resin, polyaramid resin, polyester resin or polyvinyl alcohol resin can be used.

FIG. 3 is a partially enlarged view showing the top of the roof section 20 in an enlarged manner. On the top of the frame 21, a snowboard 25 is erected, and the ends of the film material 22 on each roof surface are fixed. The edge rope 26 attached to the end of the membrane material is sandwiched between the top flange 21a and the snow cutting board 25 so as to be located at the lower end side of the top flange 21a.
7 are integrated.

FIG. 4 is a partially enlarged sectional view showing a structure for attaching the support beam 12 of the snow prevention structure 10 to the column 11.
As shown in the figure, the column 11 is a column formed by joining two channel steel flanges 11a. Support beam 12 made of flat steel
Is arranged at the upper end of the support 11 so as to be sandwiched in the gap between the flanges 11 a, and the entire roof 20 is swingably attached to the support 11 via the rotating portion 30.
That is, as shown in FIG.
The support beam 12 of the roof portion 20 is supported by a stainless bolt 32 rotatably supported by a bearing ring member 31 fixed to the support member 20.

The swing angle of the roof around the pivot 30 is
As shown in FIG. 5, it is restricted by a stopper member 40 provided between the roof portion 20 and the support 11 as a deflection angle restricting member. In the present embodiment, the rod 41 attached to the side of the frame 21 of the roof 20
However, by contacting the rod receiver 42 attached to the column 11 with a gap of L = about 15 mm, the swing angle of the roof portion 20 is regulated. Rod tip 41
A rubber plate 43 is mounted in the rod receiver 42 with which the rod a contacts, so that the generation of an impact sound when the rod comes into contact is prevented.

FIG. 6 is an explanatory view schematically showing the swinging state of the roof section 20. As shown in FIG.
In the present embodiment, the deflection angle is set in the horizontal direction by about θ = 3 °. Further, since the impact at the time of contact between the rod receiver 42 and the rod 41 transmits vibration to the surface of the film material 22, the snow and ice on the surface can be efficiently removed by fluttering of the film material 22.

FIG. 7 is a schematic side view showing a modification of the stopper member. In this modification, the swing angle of the roof portion 20 is regulated by the length of the wire 45. in this way,
The same effect as that of the stopper member 40 of FIG. 2 can be realized by an inexpensive member.

FIG. 8 is an overall perspective view showing a plan for reducing the weight of the snow accumulation preventing structure 10. As shown in FIG. As shown in FIG.
0 is divided into a plurality of surfaces 20A to 20C, and an increased number of frame frames (not shown) are made of an aluminum member or the like to reduce the weight of each frame. It can be easily rocked.

[0017]

As described above, according to the present invention,
By making the roof of the snow prevention structure a film material stretchable structure that can swing, the roof can be shaken by a slight wind etc., and the ice and snow that has arrived on the surface of the film material can be removed efficiently. This has the effect.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a snow prevention structure according to the present invention.

FIG. 2 is a side view of the snow prevention structure shown in FIG. 1;

FIG. 3 is a partially enlarged view showing a configuration of a roof top.

FIG. 4 is a partially enlarged cross-sectional view showing a structure for attaching a roof to a support.

FIG. 5 is a partially enlarged view showing a configuration of a deflection angle regulating member.

FIG. 6 is an explanatory view schematically showing a swinging state of a roof.

FIG. 7 is a side view showing a modification of the stopper member.

FIG. 8 is a schematic perspective view showing an example of reducing the weight of the snow accumulation preventing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road sign 10 Snow prevention structure 11 Prop 12 Support beam 20 Roof 21 Frame body 22 Membrane material 30 Rotating part 40 Stop member

Continuation of the front page (72) Inventor Junya Imanaka 3-22-1, Higashiyama, Meguro-ku, Tokyo Taiyo Kogyo Co., Ltd. Tokyo branch F term (reference) 2D064 AA11 AA22 BA01 CA03 CA04 CA05 CA09 DA14 DB11 GA08 HA01

Claims (2)

[Claims] 1. A snow-prevention structure which is installed above a road sign via a pillar so that the roof member covers the road sign, wherein the roof member has a roof surface stretched over a frame frame. In a state where the deflection angle is regulated by a deflection angle regulating member provided between the support and the support, the support is swingably supported on the support via a mounting fulcrum. Anti-snow structure. 2. The snow accumulation preventing structure according to claim 1, wherein said film material is a film material in which a glass fiber base cloth is coated with an ethylene tetrafluoride resin.