JP4225420B2 - Blowout type snow fence - Google Patents

Description

  The present invention relates to a snow fence, and more particularly to a blow-off snow fence that can cope with normal wind and reverse wind.

  As measures for snow prevention on roads, etc., install multiple levels of snow protection plates between the struts set up at intervals, and tilt each snow protection plate to 20 to 30 degrees during the snowing season to wind from the side road side A snow fence that is guided and distributed obliquely downward toward the main line and blows off snow from the road surface to the opposite lane side is known.

The snow fence with this structure is effective in preventing the occurrence of snow puddles in the event of a snowstorm (normal wind), but it prevents the wind from blowing off from the road side due to seasonal changes or abnormal weather. There was a problem that it became like a fence, it did not alleviate the visibility obstacles, and a big snow hill (puddle) was generated on the road, creating a bigger obstacle than when there was no fence.
In addition, since the snow fences are subject to large wind pressure during headwinds, it is necessary to replace the pillars and snow plates, re-install the foundations, or change the design of the foundations when the foundations are not equipped with large foundations due to the road structure. There was a problem that was expensive.
In addition, the snow guards are tilted even when the weather is sunny or windless, so there is a problem that the driver's eyes are blindfolded and the landscape is obstructed (compressed).
Japanese Patent Laid-Open No. 10-18233

  The present invention was made in order to solve the above-mentioned problems, and the object of the present invention is to prevent blowing up during normal winds and to reduce visibility, and to avoid wind pressure during normal or headwinds. Providing a practical snow blow fence that can prevent the occurrence of snow puddles and prevent the fall of the fence, and can improve the visibility by improving visibility outside the road when the weather is sunny or windless. .

In order to achieve the above object, the present invention provides a snow fence having a plurality of snow protection plates arranged between the support columns on both sides, each of the snow protection plates having a support shaft shifted from the center of gravity to the road side at both ends. Is provided with a support section that allows the support shaft to rotate so that the snowbreak plate falls in a substantially horizontal state when there is no wind and a reverse wind and changes to a blow-off angle that is automatically inclined downward on the road side due to wind pressure when the wind is normal. In this case, a stopper is provided on the upper side of the support portion to receive the upper surface of the end portion of the snow-preventing plate tilted downward and define the blow-off angle. It is characterized in that a stopper is provided at a slightly higher level than the support part .

  Further, according to a second aspect of the present invention, in the snow fence having a plurality of snow guard plates between the support columns on both sides, the snow guard plates are normally held at a blow-off angle inclined downward toward the road, and are automatically substantially horizontal in a headwind. Each snow protection board is supported by the column at a position shifted from the center of gravity so that it can be supported by the roadside.

According to the first aspect of the invention, since the snow protection plate is substantially horizontal when there is no wind and when the wind is reversed, the visibility can be improved from the driver's line of sight, and the wind from the road side passes as it is. It is no longer necessary to create a snow hill on the road, and visibility can be reduced. Furthermore, since the snow-prevention plate is not subjected to wind pressure, there is almost no backwind load, and even if it is designed and installed with a load in the normal wind, it is possible to prevent the fence from falling. When the wind is positive, the snowboard, which has been horizontal until then, is automatically inclined to the road by the wind pressure, so that an excellent effect can be obtained that the snow on the road can be blown away.
In addition, the structure is simple and the snowboard can be held in a stable horizontal position when there is no wind or headwind. In addition, the snowboard can be tilted smoothly and reliably at the blowing angle when the wind is normal. It is done.

  According to the second aspect of the invention, the snow-proof plate is tilted toward the road and kept at the blowing angle when there is no wind and normal wind, and the wind pressure acts on the upper part of the snow-proof plate due to the deviation of the center of gravity when the wind is reversed. Rotating the wheel to release the load, it is possible to remove the visibility hindrance from the driver's line of view and improve the landscape, and the wind from the road passes through as it is, so there is no snow hill on the road, reducing visibility hindrance it can. Furthermore, since the snow-prevention plate is not subjected to wind pressure, there is almost no backwind load, and even if it is designed and installed with a load in the normal wind, it is possible to prevent the fence from falling.

  Preferably, cushion materials are fixed to the upper and lower surfaces of the end portion of the snowproof plate that contacts the stopper. According to this, the impact at the time of standing and falling can be relieved and a soundproofing effect can be obtained.

In the second aspect of the present invention, each of the snow protection plates has a support shaft that is rotatably received by a support portion provided on the support column, and the snow protection plates are connected to each other by a lineup bar near the weight position. The stopper is provided on the side opposite to the road with a stopper that receives the lower surface of the end portion of the snow protection plate at the same level as the support portion when the snow protection plate falls.
The stopper is fixed with a cushion material that comes into contact with the lower surface of the snowproof plate.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 10 show a first mode of a blown snow fence according to the present invention.
FIGS. 1 to 3 show a normal state and a headwind state, and FIGS. 4 to 6 show a normal wind state (when the wind blows from the outside toward the road in the snowy season), respectively.
Reference numerals 1 and 1 are pillars erected at a predetermined interval by a foundation provided at regular intervals along the road. A main pillar 1a in which H-shaped steel or groove-shaped steel is joined back to back, and the web side thereof And a sub-column 1b connected to the web of the main column 1a by a horizontal beam 10 provided at regular intervals. A horizontal beam 11 is connected to the top of the main columns 1a and 1a in the left-right direction.

Reference numeral 2 denotes a plurality (four in the drawing) of snowboards that can be raised and lowered, and is arranged between the support columns 1 and 1, and in a normal state and in a reverse wind, as shown in FIG. 1 and FIG. When the wind is positive, it is supported to stand up at a required inclination angle as shown in FIGS.
The lowermost snow-prevention plate 2 is provided with a space of about 1 to 1.5 m between the ground and the ground. This is because when a snow-prevention plate is provided in this range, once snow is buried, mechanical snow removal is not possible. It will be possible and the effect throughout the season will be lost.

As shown in detail in FIGS. 7 and 8, each snow protection plate 2 is composed of a deck plate in which a plurality of ridges and depressions 203 are continuous in the longitudinal direction. End plates 20 and 20 made of steel or the like are fixed.
The both end plates are provided with shafts 200 and 200 at positions shifted from the center of gravity in the normal case. In this example, the shaft is provided at a position deviated from the center of the snow plate width. For the position of the center of gravity of the deviation, for example, a position that operates from the falling state to the standing side may be selected from a wind speed of 5 to 7 m / sec during normal wind.
Further, cushion materials 21 and 21 ′ made of rubber or the like are fixed to the upper and lower surfaces of the end portions in the width direction that are remote from the shafts 200 and 200 of the end plates 20 and 20, respectively.

  The shafts 200, 200 at both ends of the snow protection plate 2 are inserted into the vertical grooves of the main columns 1a, 1a in this example, but in order to allow the shaft to rotate at a certain height position, the main columns 1a, 9a and 10b, a bearing piece 100 crossing the longitudinal groove is fixed by welding or the like, and the shaft 200 is placed on the bearing piece 100, and the shaft 200 is prevented from being lifted. In order to achieve this, the float preventing member 101 is attached to the column flange slightly above the shaft 200 so as to be orthogonal to the shaft.

As shown in FIGS. 3 and 10, a rod-like or plate-like stopper 103 is fixed to the sub-post 1b to support the snow-proof plate 2 that has fallen rearward. The lower cushion material 21 'is supported in contact therewith.
The stopper 103 is provided at the same level as or slightly higher than the bearing piece 200 as the shaft support portion in order to support the snow protection plate 2 almost horizontally. In this example, the snow protection plate 2 is positioned at a slightly higher level than the bearing piece 200 so as to maintain an inclination angle α of 3 to 7 degrees with respect to the horizontal.

  Even if the inclination angle α is set to zero (horizontal), the snow protection plate can be lifted by lift, but if the angle α is set, the snow protection plate is brought into the snow protection plate 2 when a normal wind blows in the collapsed state of FIG. It can be easily subjected to wind pressure, can be changed smoothly to the standing posture of FIG. 5, and the visibility of the snowbreak plate can be removed from the driver's line of sight.

A hole 104 is provided above the stopper 103 as shown in FIG. 10, and an anti-floating member 105 is attached to hold the snow-proof plate 2 in a fallen state in the off season such as summer. It is like that.

  On the other hand, when the snow guards 2 stand on the horizontal rail 10 of the sub-post 1b at a level higher than that of the snow guards 2 from the above-described rearward fall state, the upper cushion material 21 of the snow guard end plates is provided. Are in contact with each other, and the stopper 110 is fixed in an inclined manner so as to be set at a predetermined blowing angle β. The blowing angle β is usually selected from a range of 20 to 30 degrees.

Explaining the operation of the first aspect, each snow protection plate 2 is supported on the support column by the shafts 200 and 200 at both ends in the longitudinal direction, but the positions of the shafts 200 and 200 are shifted forward (road side) from the center of gravity. Therefore, each snow-prevention board 2 falls backward via the shafts 200 and 200 and is supported by the stopper 103 as shown in FIG. This is when there is no wind.
In this state, since each snow guard 2 is at an angle close to the horizontal, the field of view outside the road is opened, and the scenery during driving is good.

When a positive wind blows in the direction of the road from the outside during the snowfall season, each snow protection plate 2 receives wind pressure, and thereby stands up until the top surfaces of both ends abut against the stopper 110 with the shafts 200 and 200 as fulcrums. As shown in 5 and 6, the blowing angle is inclined downward toward the road.
As a result, the wind from the outside is guided to each snow protection plate 2 inclined at the blowing angle, flows downward on the road surface, and the accumulated snow is blown away.

In this state, when the wind stops or a reverse wind blows due to abnormal weather or the like, each snow protection plate 2 tilts in relation to the position of the center of gravity, falls back again, and is supported by the stopper 103.
Thereby, the wind from the road side flows out through a large gap between the snow protection plates 2 at an angle close to the horizontal. Therefore, it does not become a blow-off fence and does not cause the accumulation of snow on the road, but it can also blow off the snow on the road and discharge it. Moreover, since each snow-protection board 2 does not receive a wind pressure at the time of a reverse wind, and a wind load can be made substantially zero, even if intensity | strength is designed on a normal wind condition, a fence does not fall down.

In addition, when the season is off, by attaching the anti-floating member 105 to the hole 104, each snow protection plate 2 can be held in a collapsed state. Further, at the off-season, the snow protection plate may be made to have the shafts 200 and 200 escape from the support and overlapped with the lower part, or the lower part of the support 1 and 1 may be folded.
In the first mode, the position of the shaft is displaced from the center of the snow protection plate width direction as a shift structure from the position of the center of gravity. Instead of this, an edge on the anti-road side is applied by applying the second mode described later. A weight member may be attached to the portion, and the position of the shaft may be provided in the center of the snow protection plate width direction.

11 to 14 show a first example of the second aspect of the present invention.
Also in this mode, the snow protection plate 2 having a plurality of center of gravity positions shifted with respect to the support columns 1 and 1 is supported to be tiltable, and the angle is automatically changed during normal wind and reverse wind. 11a and 12b maintain the blowing angle during no wind and normal wind, and automatically rotate during the reverse wind to rotate the upper half of FIGS. 11b and 12 So that it is supported in a substantially horizontal state.

  In this embodiment, the struts 1 are erected in parallel with the main strut 1a in which H-shaped steel or groove-shaped steel are joined back to back, and the flange side of the main strut 1a at a regular interval. It consists of a sub strut 1b connected to the web of the main strut 1a by a horizontal rail 10.

  As in the first mode, the snow-proof plate 2 has end plates 20 and 20 made of angle steel or channel steel fixed to both ends in the longitudinal direction. And both ends are provided with shafts 200, 200 at the center position of the snow protection plate width which is the position of the center of gravity in the normal case, and although not shown in the main column 1a, as in the first mode, A bearing piece that intersects with the longitudinal groove is fixed by welding or the like, and the shaft is placed on this bearing piece, and in order to prevent the shaft from being lifted, a floating member is placed on the column flange slightly above the shaft. Is mounted orthogonal to the axis.

In each snow protection plate 2, an adjustment weight 23 is fixed by a bolt or the like at the edge in the width direction (side closer to the road) in order to shift the center of gravity. The adjustment weight 23 is arbitrary such as a steel pipe, a steel bar, or a strip.
A vertical bar 24 for lineup is connected to a portion close to the adjustment weight 23 of each snow protection plate 2 so that the angles of all the snow protection plates 2 are changed in conjunction with each other. A fixing portion 25 that also serves as a guiding path is provided at a column portion corresponding to (in this example, a position corresponding to the middle of the lowermost step and the snow protection plate 2 above it).

  As shown in FIGS. 12 and 14, the fixing portion 25 is formed by fixing the groove member 25b to the side surface of the horizontal member 25a connecting the main column 1a and the sub column 1b, and the vertical bar 24 is inserted through the groove member 25b. It extends. The vertical bar 24 is provided with a hole 240 penetrating the plate thickness at a height corresponding to the groove member 25b, and the groove member 25b is fixed in a desired posture or angle (in this example, a horizontal posture). Therefore, a through hole 250 that matches the hole 240 at the position in the groove member of the vertical bar 24 in that state is provided, and the fixing pin 26 is inserted with the through hole 250 and the hole 240 aligned. As a result, the vertical bar 24 is not moved in the left-right direction, and therefore the posture of the snow-proof plate 2 is fixed.

  On the other hand, in order to catch the snow guard plate 2 when it falls down, the main road 1a corresponding to at least the vicinity of the support part of the snow guard board 2 at the lowest stage is on the anti-road to receive the end plate of the snow guard plate 2 A stopper 103 projecting to the side is provided, and a cushioning material 107 for shock buffering is fixed to the upper surface of the stopper 103 or the end plate of the snow protection plate 2.

15 to 17 show a second example of the second mode.
In the second example, the center of gravity position is shifted by providing the axes 200, 200 of the snow protection plate 2 at positions shifted from the center of the snow protection plate width direction as in the first embodiment.
Since others are the same as the first example, the description is incorporated.

  In the second mode, the snow protection plate 2 is normally tilted downward by the weight of the adjustment weight 23 and the snow protection plates 2 are connected by the vertical bars 24, so that they are held at the same blowing angle. This state is maintained during normal wind and no wind, and the wind from the outside is guided to the road side, so the snow accumulation is eliminated.

  When the head wind blows, the center of gravity of the snow protection plate 2 is shifted, so that the wind acts greatly on the upper portion of the snow protection plate 2, thereby rotating the entire snow protection plate 2 backward and fixing the vertical bar 24. It translates within the groove member 25b of the application portion 25. The snow plate 2 is supported horizontally by contacting the stopper 103.

As a result, the load due to the wind is released, and the wind from the road side flows out through the large gaps between the snow protection plates 2 at angles close to the horizontal as in the first mode. Therefore, it does not become a blow-off fence, and not only does not generate a puddle on the road, but also the snow on the road can be blown out of the road and discharged. Moreover, since each snow-protection board 2 does not receive a wind pressure at the time of a reverse wind, and a wind load can be made substantially zero, even if intensity | strength is designed on a normal wind condition, a fence does not fall down.
When it is desired to maintain the posture, the fixing pin 26 may be passed through the groove member 25b, which is simple.

It is a front view which shows the 1st aspect of the blow-off-type snow fence according to this invention in the state at the time of a headwind. It is the side view similarly. FIG. 3 is a partially enlarged view of FIG. 2. It is a front view which shows a 1st aspect in the state at the time of a positive wind. It is the side view similarly. FIG. 6 is an enlarged view of FIG. 5. It is a partial notch front view of the snowproof board in this invention. (a) is a side view of FIG. 7, (b) is sectional drawing of FIG. (a) is sectional drawing which shows the connection of the edge part of a snow-proof board, and the support state of a support | pillar, (b) is a front view. It is a front view which shows the support-related structure when a snow proof board falls down. (a) is a side view showing a first example of the second aspect of the present invention in a state of normal wind, and (b) is a side view showing in a state of headwind. It is an expanded sectional view which follows the XX line of Drawing 11 (a) and (b), and has shown the standing state and the fall state of the snow-proof board half by half. (a) is a top view of a snow-protection board, (b) is sectional drawing. 3 is a perspective view of a fixing portion 25. FIG. It is a side view which shows the 2nd example of the 2nd aspect of this invention in the state at the time of a normal wind. It is a partially expanded view of FIG. It is a side view which shows a 2nd aspect in a state at the time of a headwind. FIG. 14 is a partially enlarged view of FIG. 13.

Explanation of symbols

1 support 2 snow barrier plate 103 stopper 110 stopper 200 support shaft 23 weight 24 lineup bar

Claims (2)

In a snow fence with multiple snow guards between the pillars on both sides, each snow guard has a spindle that is shifted from the center of gravity to the road side at both ends. A support part is provided that allows the support shaft to rotate so that it changes to a blow-off angle that is tilted down to the road side automatically by wind pressure in a normal wind. A stopper that receives the upper surface of the end and regulates the blowing angle is provided at a position above the support, and a stopper that receives the lower surface of the end of the snow protection plate on the opposite road side is slightly higher than the support. Blowout type snow fences characterized by being provided in . The blow-off type snow fence according to claim 1 , wherein a cushioning material is fixed to the upper and lower surfaces of the end of the snow plate that contacts the stopper .

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