JP2003239224A - Snow fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snow fence which is foldable in a simple and efficient manner through light work when not used. <P>SOLUTION: The snow fence 1 is obtained by arranging, in a road direction, a snow protection panel 8 consisting of upper and lower divided panels 6, 7 connected together via a horizontal hinge shaft 5, between supports 4 each consisting of a fixed lower support 2 and an upper support 3 which is attached to the lower support 2 in a horizontally foldable manner. When the snow fence 1 is not used, an upper end of the snow protection panel 8 is lowered, and therefore the snow panel 8 is horizontally foldable on a side away from the road. The snow protection panel 8 has a wire 35 tied to an upper end thereof, which wire passes a pulley 36 to suspend the snow protection panel 8, and therefore the snow protection panel 8 is folded into the ell when the wire 35 is loosened. After the snow protection panel 8 is folded, the upper support 3 is tilted in the road direction, whereby the snow fence 1 can be stored readily. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow fence which can be folded and put into a stored state so as not to obstruct the view from the road during the season when it is not necessary to function as a snow fence.

[0002]

2. Description of the Related Art On highways in snowfall regions, snow fences are installed on the sides of roads as a measure against visibility problems caused by snow in winter, but when the snowproof function is not needed, the visibility from vehicles traveling on the road is increased. In order not to disturb the snow, a snow fence is used that can store the columns and the snow panels between the columns.

As a conventional snow-type fence of this type that can be stored, when the snow-proof panel is simply a net, the net is removed from the pillar and then the pillar is tilted in the road extension direction for storage (Japanese Patent Laid-Open No. 2001-2001). 49624 (conventional example). In addition, the snow-proof panel is a pantograph type, and this pantograph-type snow panel is folded small and removed from the pillar and stored in the lower storage part.
No. 928 (conventional example). Also, a pantograph type snow protection panel is lifted by a winch or the like to be folded small, then lowered and stored in the lower storage portion, and the pillar is also stored in the same direction by extending in the road extension direction (JP-A-9-105114 ( Conventional example)). further,
A structure in which the upper and lower snow protection panels do not interfere with each other when the support pillar is tilted in the road extension direction, and the support pillar is tilted in the longitudinal direction of the fence with the snow protection panel attached to store the entire structure (Japanese Patent Laid-Open No. 10-102427). No. (conventional example))
There is.

[0004]

Among the above-mentioned conventional snow fences, in the conventional method of manually removing the snow-proof panel of the net, the work of removing or attaching the snow-proof panel of the net is extremely complicated. Further, in the conventional example and the system adopting the pantograph type snow protection panel, the mechanism itself becomes complicated by adopting the pantograph type. Further, the conventional system requires a lifting device for lifting a folded pantograph system, and the conventional system also requires a winch. Therefore, both storage work and preparation work are extremely complicated. Further, in each of these methods, various tools are required, and since there is work at a high place, a ladder or the like is also required, and work cannot be performed if these are forgotten. Also,
In the conventional method of storing the entire snow fence by tilting the props in the longitudinal direction of the fence, not only the structure becomes more complicated, but also
A great deal of labor is required for storage work.

The present invention has been made in order to solve the above-mentioned conventional drawbacks. When the snow fence is stored when it is not in use, the storage work can be performed easily and lightly without using a power or a winch, and efficiently. The purpose of the present invention is to provide a snow fence that can be implemented in a specific manner.

[0006]

A snow fence of the present invention which solves the above-mentioned problems is provided between a support column composed of a fixed lower support column and an upper support column foldably attached to the lower support column in a substantially horizontal manner. In addition to providing a snow protection panel consisting of multiple split panels that are interconnected by a horizontal hinge axis,
When the snow fence is not used, the snow prevention panel can be folded in a substantially horizontal state on the side opposite to the road by lowering the upper end of the snow prevention panel.

[0007] Claim 2 is the snow fence of claim 1,
The snow-proof panel is composed of two split panels, an upper split panel and a lower split panel, which are connected to each other by a horizontal hinge shaft, and a rotary shaft provided at both lower ends of the lower split panel is pivotally supported by the lower strut. When the snow protection panel is folded, the snow protection panel is folded in a V shape.

According to a third aspect of the snow fence of the first aspect,
The upper strut is foldable with respect to the lower strut in the extension direction of the road after folding the snow protection panel.

According to a fourth aspect of the snow fence of the first aspect,
The lower strut pivotally supports the upper strut in the space between the front and rear portions of the lower strut so that the upper strut can be rotated in the road extension direction, and includes a stopper that holds the upper strut in a vertical state. Characterize.

A fifth aspect of the present invention is characterized in that a lower stanchion of the snow protection fence of the first aspect is provided with a cradle for receiving the folded snow protection panel in a substantially horizontal state.

According to a sixth aspect of the present invention, a spring cylinder for elastically supporting the lowermost split panel while shrinking when the lowermost split panel of the snowproof panel is folded is provided on the lower column of the snow fence. It is characterized by

[0012] Claim 7 is the snow fence of claim 1,
A wire is connected to the upper end of the snow protection panel, and a pulley for guiding the wire is provided at the upper end of the upper column.

According to an eighth aspect of the present invention, the snow-proof fence according to the first aspect is a snow-proof fence provided outside the protective fence on a road installed on a side of the road, and the snow-proof panel and the pillars are substantially horizontally folded. When it is opened, the height of the snow protection panel and the pillars in the folded state is set to be lower than the top of the protection fence.

A ninth aspect of the present invention is characterized in that the lower pillar of the snow fence of the first or eighth aspect is installed on the side slope of the road where the embankment is embanked.

A tenth aspect of the present invention is characterized in that a counterweight is attached to the lower part of the upper support column of the snow fence in accordance with the first aspect to balance the rotational direction of the lower support column about the pivotal support.

An eleventh aspect of the present invention is, in the snow fence of the first aspect, characterized in that the split panel is configured by fixing both end portions of a plurality of molded porous plates arranged in parallel to the left and right vertical frames.

According to a twelfth aspect of the present invention, in the snow fence of the first aspect, the split panel is constructed by stretching a net made of synthetic resin inside a rectangular frame.

[0018]

FIG. 1 is a rear view (a view seen from the opposite side of a road) of a span portion of a snow fence 1 according to an embodiment of the present invention, and FIG. 2 is a left side surface of FIG. 3 and 4 are perspective views showing the main part of the snow fence 1 of FIG. Also, FIG.
FIG. 5 is a left side view showing an intermediate stage when the snow fence 1 is changed from the use state of FIG. 1 to the storage state, and FIG. 5 is a perspective view of the state of FIG. FIG. 6 is a left side view showing the snow fence 1 in a stored state following FIG. 4, and FIG. 7 is a perspective view showing the state of FIG. The snow fence 1 is connected to each other by a horizontal hinge shaft 5 between columns 4 each of which is composed of a fixed lower column 2 and an upper column 3 which is attached to the lower column 2 so as to be foldable substantially horizontally. While providing a snow protection panel 8 consisting of an upper split panel 6 and a lower split panel 7,
When the snow fence 1 is not used, by lowering the upper end of the snow prevention panel 8, the snow prevention panel 8 can be folded in a substantially horizontal state on the side opposite to the road 11 (right side in FIG. 2). The snow fence 1 of the embodiment is a road 11 that is embanked.
It is installed on the slope 13 outside the protective fence 12 of. A molded non-perforated plate 38 having the same cross-sectional shape as a molded perforated plate 26 described later is fixed between the lower columns 2 below the snow-prevention panel 8.

As shown in FIGS. 2 and 9, etc., the lower support column 2 is an H-section steel lower support column base 1 fixed to a foundation 14.
6 and the lower column front part 17 of the channel steel welded and fixed to the front and rear surfaces (front and rear surfaces in the road width direction: both left and right surfaces in FIG. 2) of the upper part of the lower pillar base 16 and the lower part of the H-shaped steel It consists of the rear part 18 of the column. This lower strut 2 is the upper strut 3
With the lower part of the upper strut 3 accommodated in the space 19 between the lower strut front part 17 and the lower strut rear part 18 (the space between the lower strut front and rear parts), it can be rotated in the road extension direction by the rotating shaft 22. It is pivotally supported. In addition, the lower support 18
A U-groove-shaped shaft support 23 for receiving a later-described rotating shaft 29 on the side of the snow-prevention panel 8 is provided in the above, and a rotating shaft stopper member (not shown) is fixed. In addition, between the lower pillar front and rear parts 17 and 18,
Two upper and lower plate-shaped stoppers 20 are provided which hit the upper support column 3 vertically, and holding means (not shown) for holding the vertically supported upper support column 3 in a vertical state. Also,
A cradle 24 for receiving the folded and substantially horizontal snow-prevention panel 8 is fixed to the lower column 2 by extending it to the side opposite to the road. Further, the lower support column 3 is provided with a spring cylinder 25 that elastically supports the lower split panel 7 while shrinking it when the snow protection panel 8 is folded. The spring cylinder 25 is
This is a structure in which a coil spring that biases the retractable shaft 25a is housed in the cylindrical body 25a.

Split panels 6 and 7 above and below the snow-prevention panel 8, respectively.
As shown in detail in FIG. 8, respectively, a plurality of molded perforated plates arranged in parallel (in the illustrated example, a trapezoidal section with a flange) 2
6 has a structure in which both ends of 6 are fixed to the left and right vertical frames 27 of chevron steel by bolts, and both split panels 6 and 7 connect the connecting plates 30 fixed to the respective vertical frames 27 with hinge shafts 5. , Mutually rotatable (foldable)
Has been In addition, when the upper and lower split panels 6 and 7 are folded, they are connected by a link 31 having a V-shape that is opposite to the V-shape when folded, so that the upper and lower split panels 6 and 7 are connected during the folding operation. The folding operation is synchronized. Further, as shown in FIG. 8, FIG. 10, FIG. 11, etc., the shaft 28 for both wire attachment and guide connection is fixed to the upper end outer surface of the left and right vertical frames 27 of the upper split panel 6, which will be described in detail later, A wire 35 is connected to the shaft 28, and a guide member 34 is rotatably attached. The guide member 34 integrally fixes a weight / stopper 34a described later in detail. Further, a rotary shaft 29, which serves as a rotation center of the lower split panel 7 when the snow protection panel 8 is folded, is fixed to the lower end outer surface of the left and right vertical frames 27 of the lower split panel 7. The rotary shaft 29 fits into the above-mentioned U-groove-shaped shaft support portion 23 (see FIG. 9) provided on the lower support 2. When the snow-proof panel 8 is folded, the lower split panel 7 rotates about the rotary shaft 29.

The upper column 3 is made of H-shaped steel, and a guide member 34 attached to the shaft 28 at the upper end of the vertical frame 27 of the upper split panel 6 is fitted on the upper column 3 as shown in FIGS. Holding groove member 3 for forming holding groove 32a
2 is provided. An inclined guide portion 32b is integrally provided at the lower portion of the holding groove member 32. When the snow-prevention panel 8 is completely raised and is in a vertically used state, the guide member 34 rotatably attached to the shaft 28 of the left and right vertical frames 27 of the upper split panel 6 is fitted into the holding groove 32a of the holding groove member 32. In addition, it is stably held. When the snow protection panel 8 is vertically raised, the weight-cum-stopper 34a acts as a weight to bring the guide member 34 into the holding groove 32a. Further, a pulley 36 for guiding the wire 35 connected to the shaft 28 at the upper end of the upper split panel 6 is attached to the upper end of the upper support column 3. Further, as shown in FIG. 7, a counterweight 37 is attached to the lower portion of the upper support column 3 to balance the rotational direction of the lower support column 2 around the shaft support portion 22.

The operation procedure of the snow fence 1 will be described. At the time when it is necessary to take measures against visibility problems due to snow in winter, the upper and lower split panels 6 and 7 are completely opened and the snow-prevention panel 8 is placed on a vertical surface as shown in FIGS. 1, 2 and 3. Leave in a state. Details will be described later. As a result, the snow fence 1 can effectively perform the snow prevention function.

During the seasons other than the winter season when no measures against visibility problems are required, the snow protection panel 8 and the upper support column 3 are housed as shown in FIGS. This storing operation will be described.
The pulley 3 is attached to the shaft 28 at the upper end of the upper split panel 6.
When the wire 35 passed through 6 is loosened, the snow-prevention panel 8 is folded into a dogleg shape as shown in FIGS. At this time, the link 31 includes the upper and lower split panels 6,
7 acts so as to perform a synchronous V-shape.
Immediately before the snow-prevention panel 8 is folded substantially horizontally as shown in FIGS. 6 and 7 and placed on the pedestal 24, as shown in FIG. 9, the snow-prevention panel 8 is rotatable about the shaft 28 at the upper end of the vertical frame 27 of the upper split panel 6. The attached guide member 34 enters the groove of the lower strut rear portion 18 which is the H-shaped steel of the lower strut 2 and is immovably locked. In this case, the weight / stopper 34 a of the guide member 34 functions as a stopper that abuts the vertical frame 27, and the guide member 34 is placed in the groove of the lower strut rear portion 18.

When the snow-proof panel 8 is folded, the spring cylinder 25 elastically supports and reduces the snow-proof panel 8 (lower split-panel 7) as the lower split-panel 7 tilts to balance the weight of the snow-proof panel 8. I take the. By the action of the spring cylinder 25, the force acting on the wire 35 that suspends the snow protection panel 8 is small, and the snow protection panel 8 can be easily folded with a small force. Similarly, when the snow protection panel 8 is started up, the force of pulling the wire 35 by the urging force of the spring cylinder 25 is small, and the snow protection panel 8 can be started up with a light force.

Next, the upper support column 3 is tilted inwardly of the span about the rotary shaft 22 as shown in FIGS. 6, 7, and 9 to make it substantially horizontal. As a result, both the snow-prevention panel 8 and the upper support column 3 are folded and stored, and the overall height of the snow-prevention fence 1 is significantly lowered. Since the height of the snow fence 1 in this folded state is lower than the top of the road fence 12 as shown in FIG. 6, the driver of the vehicle traveling on the road does not obstruct the view at all. This is possible because the snow fence 1 is installed on the slope 13 on the side of the road. Further, when the upper support column 3 is tilted, the counterweight 37 is provided below the upper support column 3, so that the upper support column 3 can be prevented from being tilted by impact, and the upper support column 3 can be tilted with a small force. You can As described above, the snow fence 1 can be put in the stored state by a simple operation of loosening the wire 35 to fold the snow prevention panel 8 and then tilting the upper support column 3 in the road extension direction. The storage work of can be performed very easily and efficiently. Further, the operation of the wire 35 can be performed at a low position close to the ground, and
The tilting operation of the upper column 3 can be performed only at a low place, and work at a high place is unnecessary. Therefore, workability is good without the need for a ladder. Further, since no tools or the like are required, workability is good, and problems such as forgetting tools and being unable to work do not occur. Further, a winch, a lifting device, etc. are not required, and in this respect as well, the storage work is simple and the workability is good. Further, there is no heavy labor such as transporting the winch, and workability is also good in this respect.

An operation for bringing the snow fence 1 in the stored state shown in FIGS. 6 and 7 into the used state shown in FIGS. 1 to 3 again will be described. Upper support 3
After releasing the restraint means (not shown) that restrains the tilted state, the upper support column 3 is rotated about the rotation shaft 22 until the lower portion hits the stopper 20, stands vertically, and then is vertically held (not shown). By means of restraint in a vertical state. Next, the wire 35 is pulled to lift the upper end of the folded snow-proof panel 8 (the upper end of the upper split panel 6), and the snow-proof panel 8 stands up. At that time, the link 31 acts so that the upper and lower split panels 6 and 7 perform a synchronized start-up operation. Subsequently, the H-flange pressing plate 39 (FIG.
When (a) is applied to the upper support column 3, the snow-proof panel 8 rises vertically and becomes a plane. Next, snow protection panel 8
The vertical frame 27 is fixed to the upper column 3 by fixing means (not shown). As a result, the snow fence 1 can effectively perform the snow prevention function. At that time, immediately before the snow protection panel 8 becomes vertical, the guide member 34 at the upper end of the upper split panel 6 is provided.
Is guided by the guide portion 32b of the holding groove member 32 to hold the holding groove 3
It fits in 2a. In that case, the weight / stopper 34a of the guide member 34 acts as a weight to bring the guide member 34 into a vertical posture to enter the holding groove 32a.

In the above embodiment, the divided panels 6 and 7 of the snow protection panel 8 are formed by the molded perforated plate 26. However, like the upper divided panel 6'shown in FIG.
Alternatively, a net 41 made of synthetic resin may be stretched inside 0. In this case, the split panel and the snow protection panel can be light in weight. In this case, the net 41 may be a net in which threads are knitted, but it is preferable to use a sheet-like net formed by arranging long and narrow strip-shaped ones in a grid pattern in the vertical and horizontal directions and bonding them.

In the embodiment, the snow-prevention panel 8 is composed of the upper and lower divided panels 6 and 7, but it may be composed of three or more divided panels. However, it is appropriate that the number of divisions is an even number. Further, in the present invention, the structures of the upper columns 3 and the lower columns 2 or the materials used can be appropriately changed in design.

Although the snow fence is installed on the slope 13 on the side of the road in the embodiment, the snow fence is not limited to this. Further, since the snow fence of the present invention has a direct action of windbreak, it does not exclude installation for windbreak.

[0030]

According to the snow fence of the present invention, by lowering the upper end portion of the snow prevention panel composed of a plurality of divided panels interconnected by a horizontal hinge shaft, the snow prevention panel is substantially horizontal to the side opposite to the road. Since it can be folded into a state, when the snow fence is not used, it can be stored by simply lowering the upper end of the snow protection panel, and the storage work is extremely simple and efficient. Also, since the snowproof panel is folded,
It does not occupy a large space because the extension length to the side opposite the road is short. Also, the upper support is tilted in the road extension direction for storage (Claim 3), and the wire and pulley enable folding / starting operation of the snow-proof panel (Claim 7). Since it is possible to carry out storage work and start-up work of the snow-proof panel and the upper column at a low position, work at high places is unnecessary and workability is good. Further, since no tools or the like are needed and it is not necessary to prepare a ladder or the like for working at high places, workability is good, and there is no problem that they cannot forget to work and work. In addition, it does not require power such as winches and lifting devices,
Also in this respect, the storage work is simple and the workability is good. Further, there is no heavy labor such as transporting the winch, and workability is also good in this respect.

If the snow-prevention panel is composed of two split panels as in the second aspect, it is easy to form a mechanism for folding the snow-prevention panel in a V shape and storing it.

According to the third aspect, since the upper strut is folded in the road extension direction with respect to the lower strut, an extra space for accommodating the upper strut is not required.
Can be stored compactly. Also, because the snow support panel is folded on the side opposite to the road, the upper pillars are folded.
The two folding mechanisms of the snow protection panel and the upper support can be appropriately realized.

According to the fourth aspect, it is possible to appropriately realize the structure in which the upper support column is pivotally supported with respect to the lower support column so as to be rotatable in the road extension direction.

According to the fifth aspect, since the cradle receives the folded snow-prevention panel, the snow-prevention panel can be held in a substantially horizontal storage state without difficulty.

According to the sixth aspect of the present invention, since the spring cylinder supports the load of the snow-prevention panel when the snow-prevention panel is folded or is started up, the snow-prevention panel can be raised and lowered with an extremely light force, and the workability is remarkably improved. To do. Also,
It also has excellent workability in that it does not require power.

According to the seventh aspect of the invention, since the wire can be operated at a low position near the ground to fold and start up the snow-proof panel, work at a high place is unnecessary.
And the workability is good.

When the height of the folded snow-proof panel and the upper pillar is set lower than the top of the protective fence,
The stored snow fence is invisible to the traveling vehicle, and the snow fence does not obstruct the view of the traveling vehicle at all. In this case, if the snow fence is installed on the side slope of the embanked road as in claim 9, it is easy to lower the height of the snow fence in the stored state so that it cannot be seen from the traveling vehicle. Is.

According to the tenth aspect, since the counterweight is attached to the lower portion of the upper column, the operation of storing and starting the upper column can be performed with a light force, and the workability is improved.

[Brief description of drawings]

FIG. 1 is a rear view of a snow fence according to an embodiment of the present invention in use.

FIG. 2 is a left side view of FIG.

FIG. 3 is a perspective view showing a main part of the snow fence in the state shown in FIG.

FIG. 4 is a left side view showing an intermediate step when the snow fence is changed from the use state of FIG. 2 to the storage state.

FIG. 5 is a perspective view showing a main part of the snow fence in the state of FIG.

FIG. 6 is a left side view of the snow fence in a stored state following FIG.

7 is a diagram showing a perspective view of a main part of the snow fence in the stored state of FIG. 6. FIG.

FIG. 8 shows a snow protection panel in the snow protection fence,
(A) is a rear view of the main part of the snow protection panel, and (b) is A in (a).
FIG.

FIG. 9 is a perspective view showing a main part of a lower column in the snow fence.

FIG. 10 is a perspective view showing an upper end portion of an upper column of the snow fence.

11A is a plan view of the portion shown in FIG.
(B) is the same side view.

FIG. 12 shows another embodiment of the snow-prevention panel, and is a simplified perspective view of an upper split panel of the snow-prevention panel using a net made of synthetic resin.

[Explanation of symbols]

1 Snow fence 2 Lower support 3 upper support 4 props 5 hinge axis 6,6 'upper split panel 7 Lower split panel 8 snow protection panels 11 roads 12 Guard fence 13 slopes 14 basics 16 Lower support base 17 Lower column front 18 Rear of the lower column 19 Space between the lower column front and rear 20 stopper 22 rotation axis 23 Shaft support 24 cradle 25 spring cylinder 25a cylindrical body 25b appearance axis 25c coil spring 26 Formed Perforated Plate 27 vertical frames 28 axes 29 rotation axis 30 connection plate 31 links 32 retaining groove member 32a holding groove 32b guidance section 34 Guide member 34a Weight and stopper 35 wire 36 pulley 37 counterweight 38 Fixed molded non-perforated plate 40 rectangular frame 41 net

Claims (12)

[Claims] 1. A plurality of split panels connected to each other by a horizontal hinge shaft between struts consisting of a fixed lower stanchion and an upper stanchion foldably attached to the lower stanchion substantially horizontally. With snow protection panels,
When the snow fence is not used, the snow fence can be folded in a substantially horizontal state on the side opposite to the road by lowering the upper end of the snow fence. 2. The snow protection panel comprises an upper split panel and a lower split panel, which are connected to each other by a horizontal hinge shaft.
A rotary shaft composed of two split panels and provided at lower end portions on both sides of the lower split panel is pivotally supported by the lower strut, and when the snow protection panel is folded, the snow protection panel is folded in a V shape. Snow fence as described in paragraph 1. 3. The snow fence as claimed in claim 1, wherein the upper strut is foldable with respect to the lower strut in the road extension direction after folding the snow protection panel. 4. The lower support column pivotally supports the lower support column in the space between the front and rear parts of the lower support column so as to be rotatable in the road extension direction and holds the upper support column in a vertical state. The snow fence according to claim 1, further comprising a stopper. 5. The snow protection fence according to claim 1, wherein the lower support column is provided with a receiving stand for receiving the folded snow protection panel in a substantially horizontal state. 6. The lower support column is provided with a spring cylinder that elastically supports the lowermost split panel while shrinking when the lowermost split panel of the snow protection panel is folded. Snow fence. 7. The snow fence as claimed in claim 1, wherein a wire is connected to an upper end portion of the snow protection panel, and a pulley for guiding the wire is provided at an upper end portion of the upper strut. 8. A snow fence provided on the outside of the fence in a road installed on the side of the road, wherein the snow fence and the support pillar are folded in a substantially horizontal state when folded. 2. The snow fence as claimed in claim 1, wherein the heights of the snow fence and the columns are set to be lower than the top of the fence. 9. The lower pillar is installed on a side slope of an embanked road.
The listed snow fence. 10. The snow fence as claimed in claim 1, wherein a counterweight is attached to a lower portion of the upper support column to balance the rotational direction of the lower support column around a pivotal support. 11. The snow protection fence according to claim 1, wherein the split panel is constructed by fixing both ends of a plurality of molded perforated plates arranged in parallel to left and right vertical frames. 12. The snow fence as claimed in claim 1, wherein the split panel is formed by stretching a net made of synthetic resin inside a rectangular frame.