JPH09296418A - Preventive board against snow and wind and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a preventive board against snow and wind and the production method thereof that the transparent visibility is not spoiled owing to the diffuse reflection of light or sticking of snow and warps or deflections resulting from heat-shrink or the like are prevented and further, cracks are prevented. SOLUTION: A string-form packing body 23a with a rectangular section is formed by extrusion of a silicone rubber and a stringform adhesive rubber 23b with a rectangular section is formed by extrusion of a low-temperature setting type silicone rubber. And the adhesive rubber 23b are stuck to both front and rear faces of the packing body 23a to constitute a synthetic rubber packing 23. The synthetic rubber packing 23 is stuck to the peripheral edge or a rectangular fitting frame 22 and a rectangular flat plate 21 made of a transparent polycarbonate resin is put on the synthetic rubber packing 23 so as to contact the adhesive rubber 23b at the peripheral edge. And it is left in the normal temperature for seven days to complete a preventive board 20P against snow and wind. And the board 20P is installed between posts to constitute a preventive fence against snow and wind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snow / windproof plate which is installed on a pillar or the like to form a snowbreak fence or a windbreak fence, and a method for producing the snowbreak / windproof plate, particularly, a transparent resin such as a transparent polycarbonate resin. The present invention relates to a snow and windproof plate with improved transparency.

[0002]

2. Description of the Related Art In winter snowfall areas, snow protection fences are provided alongside roads as a measure against traffic obstacles. There are two types of snow fences: a blow-off type and a blow-off type. A blow-off type snow fence is constructed by arranging a plurality of snow plates vertically between a pair of columns. A keystone plate such as a zinc-iron plate is conventionally used as the snow-proof fence because such a snow-proof fence is required to have a strength capable of withstanding wind and snow at a wind speed of about 40 to 50 m / sec.

[0003] However, a snow protection plate made of a galvanized iron plate obstructs the view of the surroundings, so it is not preferable in terms of landscape and traffic safety. Further, it blocks sunlight to inhibit snow melting and growth of surrounding crops. There is a disadvantage of doing so. Furthermore, from the viewpoint of traffic safety, the snowboard is removed in the spring and installed in the winter.However, the snowboard made of galvanized iron sheet is heavy, and the burden on the operator when removing and installing is heavy. There is also.

Therefore, in recent years, various snow protection fences have been developed in which a snow protection board is made of a transparent resin, for example, a polycarbonate resin, and has a reduced weight and improved transparency. Then, as a snow plate made of transparent resin used for this kind of snow fence, one formed with a wavy or other uneven cross-section in order to improve rigidity (strength), and a metal reinforcing member on a plate of transparent resin. It has been proposed to provide and reinforce with bolts or the like. The former snow proof plate having an uneven cross-section has attachment frames fixed to both ends, and is detachably attached to a column via the attachment frames. The snow-proof plate reinforced with the latter reinforcing member has a transparent resin flat plate with a long hole for absorbing heat shrinkage due to temperature change, and the flat plate and the reinforcing member are connected to each other by bolts and nuts penetrating the long hole. It is constructed by tightening, and both ends are attached to the column via the attachment frame in the same manner as the former snow protection plate.

[0005]

However, in the case of the former snow-preventing plate having an uneven cross-section, diffuse reflection of light occurs, so that a decrease in transparency cannot be avoided, and the snow to be sprayed tends to adhere to the recesses. There was a problem that the transparency was impaired by the snow that adhered. In addition, in the latter case of the snowproof plate reinforced by the reinforcing member, a long hole is formed in a flat plate of transparent resin, and a bolt is inserted into this long hole to fasten the reinforcing member with a nut. There is a problem that the strength tends to decrease over time, which causes cracks in the part, and that the operator cannot absorb the thermal expansion and contraction of the flat plate when the bolt is overtightened, and the flat plate is distorted. .
The present invention has been made in view of the above problems, and an object thereof is to provide a snow / windproof plate and a method for manufacturing the same, which can secure good transparency and can prevent the occurrence of distortion due to thermal expansion and contraction. And

[0006]

In order to achieve the above object, the invention according to claim 1 is a snow and windproof plate which is used by being installed between columns, and a flat plate member made of a transparent resin, and a flat plate member of the flat plate member. An adhesive rubber layer is provided on both sides of a frame-shaped frame member corresponding to the outer shape and a substantially string-like packing main body made of synthetic rubber, and the adhesive rubber layers are adhered to the frame member and the flat plate member at one peripheral edge, respectively. In addition, a synthetic rubber packing is provided between the frame member and the flat plate member.

According to a fifth aspect of the present invention, there is provided a method for manufacturing a snow / windproof plate, wherein a synthetic rubber packing having a substantially rectangular cross section is formed by laminating adhesive rubber layers of room temperature reaction curable silicone rubber on both sides of a packing body. After that, the synthetic rubber packing is provided between the one peripheral edge of the flat plate member made of transparent resin and the frame member having a frame shape corresponding to the outer shape of the flat plate member, and the adhesive rubber layer is in contact with the flat plate member and the frame member. The weight of the flat plate member or the frame member or the load is applied to the synthetic rubber packing, and the synthetic rubber packing is left at room temperature.

The snow / windproof plate of the present invention is installed on a support pillar or the like to form a blow-off type or blow-off type snow-proof fence, or a wind-proof fence. In a preferred mode, this snow / windproof plate is removably installed on a column for convenience of removal in summer, and the structure for attaching to the column is the same as that of the keystone plate. When a snow fence or a windbreak fence is constructed by vertically arranging a plurality of snowbreakers or windbreak boards on a pillar, it is necessary to use a keystone plate on the upper side where the wind hits strongly, and a keystone plate that is transparent. The snow and windproof plate of the present application is used for the side portion.

The flat plate member is a rectangular flat plate having a plate thickness of about 3 mm to 10 mm, preferably about 4 mm to 6 mm, and a transparent resin such as a polycarbonate resin, a polyacrylate resin or a polyvinyl chloride resin, preferably a transparent resin. , A polycarbonate resin excellent in transparency, impact resistance and heat resistance (claim 2). On this flat plate member, if necessary, a weather resistant acrylic resin film or a fluorine resin film containing an ultraviolet absorber is laminated on at least one of the front and back surfaces, or a layer is formed by coating with a similar resin paint. .

The frame member is a frame-shaped member corresponding to the outer shape of the flat plate member, in other words, a member having an opening at the center, and a locking tool that can be locked to a column or the like on a pair of opposing outer portions. Is provided. The frame member is made of a material such as metal having excellent strength and rigidity, such as iron, stainless steel, aluminum, or fiber reinforced plastic.

The synthetic rubber packing is formed by laminating adhesive rubber layers on both front and back surfaces of the packing body, and is formed into a string shape having a rectangular cross section as a whole. The layer adheres to the frame member.
The packing main body is formed by extrusion molding using rubber such as silicone rubber or nitrile rubber, and is 5 mm to 50 m.
It has a thickness of m (preferably a thickness of 10 mm to 30 mm). In a desirable mode, this packing body is
Silicone rubber excellent in durability such as weather resistance, heat resistance, cold resistance and moisture resistance, or a silicone rubber containing a black pigment such as carbon black, more preferably JI
Silicone rubber having an S hardness of 30 to 60 degrees (claim 3),
Further, it is molded from a silicone rubber containing a black pigment such as carbon black and having a JIS hardness of 30 to 60 degrees.

The adhesive rubber layer is an adhesive such as a rubber adhesive,
A room temperature reaction-curable silicone rubber is preferable, and a room temperature reaction-curable silicone rubber containing a black pigment is more preferable. The adhesive rubber layer is formed into a string-like shape having a rectangular cross section with a thickness of about 2 mm to 5 mm by a known forming method such as calender molding, extrusion molding, and cast molding using the above-mentioned room temperature reaction-curable silicone rubber.
After molding, it is bonded to the packing body, or integrally molded at the same time as the packing body.

When manufacturing the snow / windproof plate,
If necessary, the bonded portion of the flat plate member and the bonded portion of the frame member may be subjected to a primer treatment, and a synthetic rubber packing may be attached to one of the flat plate member and the frame member so that the adhesive rubber layer on one surface is in contact, and The other of the frame member or the flat plate member is overlaid on the rubber packing and brought into close contact with the adhesive rubber layer on the other surface. Then, either the flat plate member or the frame member is vertically downward (upper) positioned under a self-weighted condition for a predetermined time (for example, 7 ° C. at 23 ° C.).
Leave at room temperature for about a day), or under a load applied with an appropriate load for a predetermined time (50 to 60) in a drying oven or the like.
The adhesive rubber layer is hardened by heating at ° C for about 24 hours.

[0014]

Since the snow and windproof plate according to the present invention is constructed by fixing one peripheral edge of a transparent resin flat plate member to a frame member having a frame shape with a synthetic rubber packing, the flat plate member in the central portion of the frame member is transparent. Of the flat plate member can be ensured, and rattling of the flat plate member due to wind or the like can be prevented. Further, since the flat plate member made of a transparent resin has a flat surface, it does not cause irregular reflection and does not collect snow that has been blown thereon, and can maintain good transparency.

Since the flat plate member and the frame member have different coefficients of thermal expansion, the length of heat shrinkage caused by the temperature change of the season and day and night is also different, but the difference in heat shrinkage is absorbed by the elastic deformation of the synthetic rubber packing. . Therefore, a large stress is not generated in the flat plate member, and it is possible to prevent warpage and distortion.

Further, in the method for manufacturing a snow / windproof plate according to the present invention, a synthetic rubber packing is interposed between the flat plate member and the frame member, and either the flat plate member or the frame member is positioned above. That is, it is manufactured by leaving it at room temperature while being loaded with its own weight. Therefore, no special equipment is required as manufacturing equipment, and the initial cost is reduced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a snow / windproof plate (hereinafter referred to as a snow plate) according to an embodiment of the present invention, and FIG. 1 is an overall front view of a blow-off type snow fence using the snow plate. 2 is a side view of the snow protection fence, FIG. 3 is a schematic front view of the snow protection plate, FIG. 4a is a sectional view taken along the line AA of FIG. 3, and FIG.
Is a sectional view taken along the line BB of FIG. 3, and FIG. 4c is a sectional view taken along the line CC of FIG.

In FIGS. 1 and 2, 10 and 10 are pillars which are erected at predetermined intervals along a roadside strip of a road, and the pillars 10 and 10 are concrete blocks whose lower ends are buried in the ground. It is fixed to 12 by anchor bolts 11, and upper ends thereof are connected to each other by cross members 13. A plurality of (four) fasteners (not shown) are opposed to and fixed to the pillars 10 at predetermined intervals in the vertical direction, and the four snow protection plates 20 can be attached and detached using these fasteners. It is erected in.

The snow protection plates 20 are attached at intervals in the vertical direction with a predetermined angle θ (about 28 ° in this embodiment) with respect to the vertical axis, and the lower two are related to the present invention. A snow plate (for convenience sake, reference numeral 20P) is used, and the upper two (for convenience, reference numeral 20S) are keystone plates such as zinc-iron plates. Since the snow protection plate 20S made of a keystone plate is well known, its detailed description and illustration are omitted.

The snow plate 20P, as shown in FIGS.
A rectangular flat plate (flat plate member) 21 made of a transparent resin such as a polycarbonate resin and a mounting frame (frame member) 22 made of a metal such as iron are provided with a synthetic rubber packing 23 (for the sake of convenience, hatched lines are shown in FIG. 3). It is firmly fixed by. The flat plate 21 has a weather-resistant acrylic resin film 21a containing an ultraviolet absorber laminated on both front and back surfaces. As will be described later, the flat plate 21 has a synthetic rubber packing 23 interposed between a mounting frame 22 and a peripheral edge of one surface (a surface perpendicular to the paper surface in FIG. 3, hereinafter referred to as a rear surface for convenience), and the composite rubber packing 23. The rubber packing 23 secures the periphery of the back surface to the mounting frame 22 over the entire circumference.

The mounting frame 22 is constructed by assembling iron angles or the like into a rectangular frame shape by welding or the like. The mounting frame 22 has a frame portion 31 having a rectangular window opening 31a corresponding to the outer shape of the flat plate 21, and a trapezoidal shape which is provided at the outer end in the longitudinal direction of the frame portion 31 at right angles toward the front surface side. It has a mounting portion 32 and a reinforcing rib portion 33 provided at a predetermined height toward the front surface side at an outer end in the lateral direction of the frame portion 31. In this mounting frame 22, the peripheral edge of the flat plate 21 is fixed to the surface of the frame portion 31 by the synthetic rubber packing 23, and the locking metal fitting 29 is fixed to the outer surface of the mounting portion 32 by welding or the like. The locking fitting 29 is the same as the snow protection plate 20S of the keystone plate described above, and is detachably locked to the fastener of the column 10.

The synthetic rubber packing 23 has adhesive rubber 2 on both front and back surfaces of a packing body 23a having a rectangular cross section.
3b is pasted together to form a string having a substantially rectangular cross section. The packing body 23a is formed by calender molding, extrusion molding, cast molding or the like using silicone rubber mixed with a black pigment such as carbon black. This packing body 2
3a has a thickness dimension of about 5 mm to 50 mm and a width dimension appropriately selected according to the width dimension and shape of the frame portion 31 of the mounting frame 22, the shape and weight of the flat plate 21, and the like. The synthetic rubber packing 23 can also be used by being connected in a ring shape.

The adhesive rubber 23b is formed into a cord having a rectangular cross section by calendar molding, extrusion molding, cast molding or the like using a room temperature reaction-curable silicone rubber containing a black pigment such as carbon black. The adhesive rubbers 23b are attached to both the front and back surfaces of the packing body 23a and fixed to the packing body 23a, and also fixed to the flat plate 21 and the mounting frame 22. In addition, as described above, the adhesive rubber 23
It is also possible to mold b together with the packing body 23a.

In this embodiment, the snow plate 20P
Attaches the flat plate 21 made of transparent polycarbonate resin to the mounting frame 22 in which the window opening 31a is formed.
The window opening 31a ensures the transparency. The snow fence uses the transparent snow-proof plates 20P as the lower two and the metal keystone plate snow-proof plates 20S as the upper two, so that it can withstand strong winds. Also, good visibility can be secured and growth of surrounding crops and snow melting are not hindered.

Further, since the snow protection plate 20P is constructed by fixing the periphery of the flat plate 21 to the mounting frame 22 with the synthetic rubber packing 23, there is no unevenness on the front and back, and when the flat plate 21 is mounted on the mounting frame 22, the flat plate 21 is flat. It is not necessary to make a long hole in 21. Therefore, diffuse reflection of light does not occur,
In addition, no snow accumulates, good transparency can always be maintained, and cracks can be prevented from occurring.

On the other hand, the flat plate 21 is a mounting frame 22 made of iron.
The thermal expansion coefficient is different from that of the flat plate 21, and the heat shrinkage length of the flat plate 21 and the mounting frame 22 caused by the temperature change of the season and the day and night
Although the length of heat shrinkage is different, the difference in heat shrinkage is absorbed by the synthetic rubber packing 23. Therefore, the flat plate 21 is not subjected to excessive stress, and the flat plate 21 can be prevented from warping and the like.

Then, the snow protection plate 2 according to the present embodiment.
0P is manufactured as described below. First, the packing main body 23a is formed by the above-described extrusion molding using silicone rubber, and the two adhesive rubbers 23b are formed by the extrusion molding using normal temperature reaction-curable silicone rubber. These adhesive rubbers 23b are formed on the packing main body 23a. The synthetic rubber packing 23 is formed by sticking on both surfaces.

Next, the surface of the frame portion 31 of the mounting frame 22 and the peripheral portion of one surface of the flat plate 21 are subjected to a primer treatment, and the mounting frame 22 is placed on a jig or the like so that the primer-treated surface faces upward. Subsequently, the synthetic rubber packing 23 is placed on the primer-treated surface of the mounting frame 22 so that one adhesive rubber 23b comes into contact with the primer-treated surface, and a flat plate is placed on the other adhesive rubber 23b of the synthetic rubber packing 23. The primer processing surface 21 is positioned and placed so that the peripheral edge portion of the surface is in contact.

Then, as described above, the mounting frame 22 and the flat plate 21 which are overlapped with the weight of the flat plate 21 added to the synthetic rubber packing 23 are left at room temperature for about one week,
Alternatively, it is housed in a heating furnace and heated to 50 ° C to 60 ° C.
The adhesive rubber 23b is cured by heating for about 4 hours to fix one adhesive rubber 23b to the mounting frame 22 and the other adhesive rubber 23b to the flat plate 21. The adhesive rubber 23
When curing b, apply an appropriate load to the adhesive rubber 2
It is also possible to increase the contact pressure between 3b and the mounting frame 22 or the flat plate 21, and the flat plate 21 and the mounting frame 2
It is also possible to reverse the order of stacking two.

As described above, the snow protection plate 20P can be manufactured without using special manufacturing equipment, the initial cost is low, and the snow protection plate 20P can be provided inexpensively. It has been proved that the snow plate 20P manufactured in this manner has the flat plate 21 and the mounting frame 22 firmly fixed to each other, and can withstand a considerable amount of wind and snow even when it is installed on the column 10 to form a snow fence.

[0031]

Next, an embodiment of the present invention will be described. In this embodiment, the span between the columns 10 and 10 is 4000 mm, the height of the column 10 is 3800 mm, and four snow-preventing plates 20 are installed between the columns 10 and 10. Two of them are metal snow protection plates 20S made of a keystone plate of zinc iron plate, and two lower ones are made of resin snow protection plates 20P having a flat plate 21 of transparent polycarbonate resin. The height from the lower edge to the ground was 1200 mm. The keystone plate metal snow plate 20S has a thickness of 1.6 mm and a width of 6 mm.
The one having a length of 20 mm and a length of 3750 mm was used.

The flat plate 21 is made of a transparent polycarbonate resin having a thickness of 5 mm, a width of 620 mm, and a length of 3800 mm, both sides of which are flat.
A 10 μm-thick acrylic resin film was laminated on both the front and back sides of the above to carry out weather resistance treatment.

The adhesive rubber 23b is a room temperature reaction curable rubber (H
R-23 Shin-Etsu Polymer Co., Ltd. is used, and the thickness is 2
It was extruded into a rectangular cross section having a width of 20 mm and a width of 20 mm. The packing body 23a is made of silicone rubber (KE54
1U Shin-Etsu Chemical Co., Ltd. 100 parts, vulcanizing agent (C
-18 Using a composition in which 1.5 parts of Shin-Etsu Chemical Co., Ltd.) and 1.0 part of a black pigment (ColorBB Shin-Etsu Chemical Co., Ltd.) are mixed, a thickness of 30 mm and a width of 20 m are used.
m was extruded into a rectangular cross section. Then, adhesive rubbers 23b were attached to both surfaces of the packing body 23a to form a synthetic rubber packing 23.

Next, the synthetic rubber packing 23 was attached to a predetermined portion of the mounting frame 22 in a substantially annular shape, and then the flat plate 21 was superposed on the synthetic rubber packing 23 by aligning it. After that, the weight of the flat plate 21 was left on the synthetic rubber packing 23 for 7 days, the adhesive rubber 23b was cured, and the flat plate 21 and the mounting frame 22 were integrated by the synthetic rubber packing 23 to obtain the snow protection plate 20P.

Then, the above-mentioned snow-preventing plate 20P is attached to the pillar 10.
The snow fence was constructed by assembling. It was proved that this snow fence can be made lighter and does not obstruct the view, and has sufficient strength.

[0036]

As described above, according to the snow and windproof plate of the present invention, the following effects can be obtained. It consists of a flat plate member made of transparent resin and is fixed to the frame member with synthetic rubber packing to prevent snow and dirt from adhering, and to prevent irregular reflection of light, maintaining a good visual field at all times. Safety and landscape can be improved. Since it can be configured only with a transparent resin flat plate member, a frame-shaped frame member, and a synthetic rubber packing, the weight can be reduced,
Easy to install and remove. The flat plate member and the frame member are joined by the synthetic rubber packing, and the synthetic rubber packing absorbs the difference in heat shrinkage, so that the flat plate member can be prevented from being warped or distorted, and the flat plate member and the frame member are joined together. Since no bolts or the like are used for it, it is possible to prevent the occurrence of cracks due to excessive tightening by the worker.

Further, according to the manufacturing method of the present invention, it is possible to manufacture the snow / windproof plate without requiring special equipment, the initial cost is extremely low, and the manufacturing cost can be reduced to provide at low cost.

[Brief description of drawings]

FIG. 1 is a front view of a snow fence using a snow / windproof plate according to an embodiment of the present invention.

FIG. 2 is a side view of the snow fence.

FIG. 3 is a schematic plan view of the snow and windproof plate.

4 is a cross-sectional view taken along the line AA of FIG. 3, and b is a line B- of FIG.
3 is a sectional view taken along arrow B, and c is a sectional view taken along arrow CC of FIG.

[Explanation of symbols]

 10 Struts 20P Snow Protection Plate 21 Transparent Flat Plate (Plate Member) 21a Weatherproof Acrylic Resin Film 22 Mounting Frame (Frame Member) 23 Synthetic Rubber Packing 23a Packing Body 23b Adhesive Rubber (Adhesive Rubber Layer) 31 Frame Part 31a Window Opening 32 Mounting part 33 Reinforcing rib part

Claims (5)

[Claims] 1. A snow and windproof plate to be installed between columns, the flat plate member made of a transparent resin, a frame-shaped frame member corresponding to the outer shape of the flat plate member, and a synthetic rubber member. An adhesive rubber layer is provided on both sides of the string-shaped packing body, and the adhesive rubber layer is interposed between the frame member and the flat plate member by adhering the adhesive rubber layer to one peripheral edge of the frame member and the flat plate member, respectively. A snow and windproof plate characterized by having a synthetic rubber packing. 2. The snow and windproof plate according to claim 1, wherein the flat plate member is made of a transparent polycarbonate resin. 3. The snow / windproof plate according to claim 1, wherein the packing body of the synthetic rubber packing is a silicone rubber having a JIS hardness of 30 to 60 degrees. 4. The adhesive rubber layer of the synthetic rubber packing is a room temperature reaction-curable silicone rubber.
Alternatively, the snow and windproof plate according to claim 3. 5. A synthetic rubber packing having a substantially rectangular cross section in which adhesive rubber layers of a room temperature reaction curable silicone rubber are laminated on both sides of a packing body, and then a flat plate member made of a transparent resin and a peripheral edge of the flat plate member. The synthetic rubber packing is interposed between a frame member having a frame shape corresponding to the outer shape of the member in a state where the adhesive rubber layer is in contact with the flat plate member and the frame member, and the synthetic rubber packing has the flat plate member or the frame. A method for manufacturing a snow / windproof plate, which comprises leaving the member at a room temperature by applying weight or load.