JP3256477B2 - Protective fence - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection fence used for wind protection, snow protection, sand protection, wave protection, sound insulation, etc., and more particularly to a protection fence suitable for a blow-off type snow protection fence. The present invention relates to a protective fence using a transparent resin plate, such as a transparent resin plate, which suppresses vibration of the transparent resin plate and prevents cracks from occurring.

[0002]

2. Description of the Related Art In winter snowfall areas, snow protection fences are provided on the side of roads as a measure against traffic obstacles. There are two types of snow fences: blow-off type and blow-off type.The snow-proof fence of the blow-off type is constructed by mounting multiple snow plates vertically up and down between columns, and the snow fence of the blow-off type is installed between the columns. The boards are erected at intervals. Such a snow fence is required to have a strength capable of withstanding wind and snow at a wind speed of about 40 to 50 m / s, and thus a keystone plate or a perforated zinc iron plate is conventionally used as the snow protection plate.

[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 snowboards must be removed in the spring and installed in the winter, but the snowboards made of zinc iron are heavy, and the burden on workers when removing and installing them is large. There is also.

Therefore, in recent years, various types of blow-off type snow-proof fences using a transparent resin plate as the snow-proof plate, for example, a transparent resin plate of polycarbonate resin have been proposed. Such blow-off snow fences adopt a mounting structure in which rubber packing is interposed between a transparent resin plate and a fastening member or reinforcing member to prevent vibration and cracks in the transparent resin plate. I do.

[0005]

The above-mentioned conventional mounting structure is effective for a blow-off type snow fence in which wind and snow blows through between the transparent resin plates. However, the blow stop which must block the wind and snow by the transparent resin plate. Not suitable for snow fences. In other words, in the blow-off type snow barrier, the transparent resin plate is likely to vibrate, and it is desired to prevent inconveniences such as noise and cracks caused by the vibration. The snow-proof fence of the blow-stop type provided without any vibration is hardly vibrated in the individual transparent resin plates, but receives a large load due to the snow and measures against the load due to the snow are required. The present invention
In view of the above circumstances, it is an object of the present invention to provide a protective fence capable of withstanding a load caused by snow and the like and effectively preventing a transparent resin plate from being cracked due to thermal expansion and contraction due to temperature changes such as day and night. Aim.

[0006]

In order to achieve the above object, the present invention is a protective fence constructed by vertically mounting a plurality of transparent resin plates between pillars, wherein the transparent resin plate comprises:
The cross section is substantially U-shaped, and a reinforcing portion having a substantially arc-shaped cross section is formed at the center in the width direction, and the upper and lower side edges of this transparent resin plate are overlapped with the side edges of the vertically adjacent transparent resin plates, respectively. A metal strip-shaped mounting bracket is formed on the end of the transparent resin plate so as to be bent in conformity with the substantially U-shaped cross section of the transparent resin plate and provided substantially over the entire length in the width direction of each transparent resin plate. By means of a bolt penetrating the mounting bracket and the transparent resin plate, a side of the transparent resin plate adjacent to each other at an end portion of the transparent resin plate such that upper and lower side edges of the transparent resin plate are substantially in the same plane. Edges are overlapped and fixed so that the plane is substantially parallel to the mounting surface of the support, and are connected to each other at a longitudinal intermediate portion of a side edge overlapping portion of the plurality of transparent resin plates, thereby forming the transparent resin plate. End and the mounting bracket It is obtained respectively by interposing a rubber packing between and between the transparent resin plate and the post.

The transparent resin plate has a U-shaped cross section of a polycarbonate resin, a polyacrylate resin, a polyvinyl chloride resin, or the like, and has a reinforcing portion having a substantially arc-shaped cross section at the center in the width direction. Are used by being interconnected at the middle part in the longitudinal direction. On this transparent resin plate, if necessary, an acrylic resin film or a fluorine resin film excellent in weather resistance is laminated on at least one of the front surface and the back surface, or a coating film is formed by a paint, Deterioration is prevented. Note that the transparent resin plate may be formed to have a stiffness by being formed in a transverse cross-section wave shape or the like.

[0008] The mounting bracket is formed of a band-like member made of metal such as iron, stainless steel, or aluminum, and is bent and formed with a predetermined width in accordance with the cross-sectional shape of the transparent resin plate. In this mounting bracket, the end of the transparent resin plate is provided over the entire length in the width direction (substantially the entire length).

A long hole for mounting is formed in the mounting bracket, and a long hole or notch is formed in the transparent resin plate. The transparent resin plate is bolted through the long hole of the transparent resin plate and the long hole of the mounting bracket. Is attached to the support. In the transparent resin plate, edges in the width direction (vertical direction) are overlapped with each other, and intermediate portions are connected to each other.

[0010] A rubber packing is interposed at least around the bolt between the transparent resin plate and the mounting bracket and between the transparent resin plate and the support, ie, between the transparent resin plate and the metal member with which the transparent resin plate contacts. You. The rubber packing is made of synthetic rubber such as chloroprene rubber, EPDM, silicone rubber or nitrile rubber, preferably silicone rubber having excellent weather resistance, and more preferably rubber hardness (JIS) blended with black pigment such as carbon black. K6301) is 3
A silicone rubber of 0 to 60 degrees (preferably 40 to 60 degrees) is used.

[0011]

Since the protective fence according to the present invention is constructed by arranging a transparent resin plate between the columns, transparency can be ensured, and the burden on the operator when attaching and detaching the transparent resin plate is reduced. The transparent resin plate is attached with its ends sandwiched between the support bracket and the support by a mounting bracket, and rubber packing is interposed between the transparent resin plate and a metal member such as the mounting bracket. The generation of cracks due to thermal expansion and contraction can be prevented, and the upper and lower edges can be attached to each other so that they can withstand loads due to snow and the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 6 show a snow-proof fence (protection fence) of a blow-stop type according to an embodiment of the present invention. FIG. 1 is an overall front view, FIG. 2 is a plan view, and FIG. 4 is a side sectional view in which the same part is enlarged, FIG. 5 is a side sectional view in which another part is enlarged, and FIG. 6 is a view showing details of the transparent resin plate.

In FIGS. 1, 2, 3, and 4, reference numerals 10 and 10 denote pillars that are erected at predetermined intervals along a roadside zone of a road, and the pillars 10 and 10 are made of H-shaped steel. For example, five snow protection plates 20 made of a zinc iron plate on the lower side, and nine snow protection plates (transparent resin plates) 30 made of a transparent resin on the upper side are vertically provided between the columns 10 and 10. Although not shown, the pillar 10 has a concrete block 1 at the lower end.
The mounting holes 1 for fixing the snowproof plates 20 and 30 are formed at predetermined intervals in the longitudinal direction by being fixed in the ground by 1. Although illustration and explanation are omitted, a well-known snowproof plate 20 is used, and is attached similarly to a snowproof plate 30 described later.

As shown in FIGS. 6 (a) and 6 (b), the snow protection plate 30 has a substantially U-shaped cross section having a flat portion 31 in the middle in the width direction and a band portion (side edge) 32 on both sides in the width direction. A long plate,
A recessed portion (reinforcement portion) 31a having a semicircular cross section is formed in the flat portion 31 over the entire length in the longitudinal direction, and a mounting long hole 32a having a long diameter in the longitudinal direction is provided at both ends of each band-shaped portion 32. The long holes 32b are respectively formed. This snow plate 3
No. 0 is obtained by molding a thermoplastic resin plate such as a polycarbonate resin by hot pressing, vacuum molding, air pressure molding or the like.
The longitudinal dimensions of the long holes 32a and 32b are determined in consideration of the expansion and contraction of the snow protection plate 30 due to the temperature difference between the season and day and night. In addition, a reinforcing member such as a pipe can be provided in the above-described concave portion 31a.

As shown in FIGS. 3 and 4, the snow plate 30 has upper and lower strips 32 overlapped with each other,
0 and the support 10. Mounting bracket 40
Is formed by bending a strip-shaped metal plate in the same manner as the cross-sectional shape of the snow-proof plate 30, and having the longitudinal direction (horizontal direction)
A long hole having a long diameter (a reference number is omitted) is formed in the hole.
A bolt 61 is inserted into the long hole of the mounting bracket 40 and the long hole 32a of the snowproof plate 30, and the bolt 61 passes through the mounting hole of the column 10 and a nut 62 is screwed to an end. Here, 63 is a flat washer, and 64 is a spring washer.

The mounting bracket 40 and the snow plate 30
An annular rubber packing 50 is interposed between each of the bolts 61 and between the snow protection plate 30 and the column 10, and the bolts 61 are inserted through these rubber packings 50. The rubber packing 50 is made of silicone rubber having excellent weather resistance. The rubber packing 50 may be formed in a belt shape having the same shape as the mounting bracket 40 in a plan view, and the rubber packing 50 may be formed with an adhesive or the like.
It is also possible to fix it to 0 beforehand.
The rubber packing 50 and the mounting bracket 40 can be bonded and fixed to the snowproof plate 30.

Further, as shown in FIG.
At 0, a bolt 69 is inserted through an intermediate connecting slot 32b via a width stopper 67, and a rubber packing 51 is interposed between each width stopper 67 and each snowproof plate 30. As shown in FIG. 5B, the width stopper 67 has a hole 6 in the center.
7a is formed of a rectangular metal plate, and is located outside the upper and lower snow protection plates 30. The bolt 69 is attached to the width stopper 67.
The nut 68 is screwed into the end portion through the hole 67a, the rubber packing 51, and the long hole 32b to connect the upper and lower snowproof plates 30 to each other. The rubber packing 51 is made of silicone rubber or the like, similarly to the rubber packing 50 described above. Here, 63 is a flat washer, and 64 is a spring washer.

In this embodiment, the support 1
Since the upper nine snow plates 30 between 0 and 10 are made of a transparent polycarbonate resin, transparency is ensured, a good visibility is obtained, and growth and snow melting of surrounding crops and the like are hindered. No, furthermore, the snowboard 30 can be reduced in weight,
It is possible to reduce the burden on the worker when attaching and detaching.

The snow-proof plate 30 has upper and lower strips 32 overlapped with each other, and the ends thereof are attached to the columns 10 by the mounting brackets 40.
And is attached to the column 10, and a rubber packing 50 is interposed between the mounting bracket 40 and the column 10. That is, the bolt 61 is attached to the mounting bracket 4.
0 through the through hole, the long hole 32a and the column 10 and screwed into the nut 62, and between the snow plate 30 and the mounting bracket 40 and between the snow plate 30 and the column 10 a rubber packing 50 is provided.
Is interposed.

Therefore, the thermal expansion and contraction of the snow protection plate 30 due to the temperature change can be absorbed, the generation of cracks due to the thermal expansion and contraction can be prevented, the vibration of the snow protection plate 30 can be suppressed, and the load due to snow accumulation can be reduced. Can also withstand. In particular, in this embodiment, since the snow protection plate 30 is also connected to the middle part up and down by the bolts 69 and the nuts 68, high rigidity and strength are obtained, and the snow protection plate 30 is largely bent by the load due to snow accumulation. And high reliability can be obtained.

[0021]

Next, an embodiment of the present invention will be described. Prop 1
No. 0 used H steel of H-125 × 125 × 6.5 × 9 mm, and was configured to have a span of 3000 mm and a height of 3500 mm. Between the pillars 10 and 10, five metal snow shields 20 were installed on the ground surface side, and nine transparent synthetic resin snow shields 30 were installed on the upper side. The metal snow protection plate 20 is formed by forming a zinc iron plate having a thickness of 2.3 mm into a trapezoidal shape with a semicircular hollow at the center by a cold bench press, and has a width of 250 mm and a length of 296.
The thing of 0 mm was used.

The transparent synthetic resin snow plate 30 has the same shape as the metal snow plate 20 and has a thickness of 4.5 mm and a width of 25 mm.
0 mm and length 2960 mm. This transparent synthetic resin snowproof plate 30 was formed into a U-shaped cross section by vacuum forming a transparent polycarbonate resin plate obtained by laminating an acrylic resin film having a thickness of 10 μm on both sides. The transparent synthetic resin snow-prevention plate 30 and the metal snow-prevention plate 20 have a major axis of 20 at each of both sides and in the middle in the longitudinal direction.
The long holes 32a and 32b having a short diameter of 10 mm and a short diameter of 10 mm were formed.

The mounting bracket 40 has a thickness of 1.6 × width 4
A zinc iron plate having a length of 0 × 320 mm is bent by a bender into the same shape as the cross-sectional shape of the snow-resistant plate 30, and the major diameter is 20 mm.
Slots with a short diameter of 10 mm for bolt insertion were formed in two places. The rubber packing 50 was formed by punching a silicone rubber sheet having a thickness of 2 mm into a packing shape having a diameter of φ50 mm and a hole φ12 mm for inserting a bolt in the center with a big blade. As the bolts 61 and 69, the flat washer 65, the spring washer 66, and the nuts 62 and 68, standard M8 × 30 products were used.

The snowproof fence of the blow-stop type according to this embodiment has good visibility, and the snowboard 30 can be easily attached and detached, the vibration of the snowboard 30 can be prevented, and cracks and the like occur on the snowboard 30. Without having to do so, it was able to withstand not only wind pressure loads but also snow loads, and high commercial value and excellent reliability were obtained.

[0025]

As described above, according to the present invention, a plurality of transparent resin plates are erected between the columns with their upper and lower side edges overlapped with each other, and have a substantially U-shaped cross section and a central portion in the width direction. On each of the longitudinal ends of the transparent resin plate on which a reinforcing portion having a substantially arc-shaped cross section is formed, a metal band-shaped mounting bracket which is bent and formed so as to conform to the substantially U-shaped cross section of the transparent resin plate is overlapped. Fix the end of the transparent resin plate to the support with bolts that penetrate the mounting bracket and the transparent resin plate, and apply rubber packing between the end of the transparent resin plate and the mounting bracket and between the transparent resin plate and the support, respectively. Because of the interposition, transparency can be obtained, light weight can be achieved and attachment and detachment can be easily performed, vibration of the transparent resin plate is suppressed, cracks can be prevented, and not only wind pressure load but also snow load etc. Endurance Of snow fences can be obtained. In addition, the configuration using this transparent resin plate is not only
It is also effective as a protective fence for sand, wave and sound insulation.

[Brief description of the drawings]

FIG. 1 is a front view of a snow stop fence (protection fence) of a blow-stop type according to an embodiment of the present invention.

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

FIG. 3 is a front cross-sectional view of a mounting portion of the snow fence of the snow fence.

FIG. 4 is a side sectional view of the attachment portion.

5A and 5B show a connection portion of a snow protection plate of the snow fence, in which FIG. 5A is a side sectional view and FIG. 5B is a plan view of a width stopper used for the connection.

FIG. 6 shows a snowboard of the snow fence, where (a) is a front view,
(B) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Prop 20 Metal snow plate 30 Transparent resin snow plate (transparent resin plate) 32 Strip (side edge) 32a Slot 32b Slot 40 Mounting bracket 50 Rubber packing 61 Bolt 62 Nut 63 Flat washer 64 Spring washer 67 Width stop Hardware 68 Nut 69 Bolt

Continuation of front page (56) References JP-A-7-259020 (JP, A) JP-A-60-233214 (JP, A) JP-A-9-158129 (JP, A) Utility model registration 2546173 (JP, Y2) ) Jiko 5-6119 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E01F ^7/ 00-7/04 E01F 8/00

Claims (1)

(57) [Claims] 1. A protective fence comprising a plurality of transparent resin plates vertically adhered to each other between columns, said transparent resin plates having a substantially U-shaped cross-section, and a cross-section substantially at the center in the width direction. An arc-shaped reinforcing portion is formed, and the upper and lower side edges of the transparent resin plate are overlapped with the side edges of the transparent resin plate vertically adjacent to each other, and at the end of the transparent resin plate, the cross section of the transparent resin plate is approximately A transparent tree that is bent and formed in conformity with the U-shape
Superimposed metal strip mounting bracket provided across the width substantially all the length of each lipid plates, the bolts passing through the mounting bracket and the transparent resin plate, the transparent tree
At the end of the fat plate, the upper and lower side edges of the transparent resin plate are substantially the same.
Side edges between adjacent transparent resin plates so that they are in one plane
Overlapping, so that the plane is substantially parallel to the mounting surface of the column
And fixedly connected to each other at an intermediate portion in the longitudinal direction of a side edge overlapping portion of the plurality of transparent resin plates, between an end portion of the transparent resin plate and the mounting bracket, and between the transparent resin plate and the support column. Protective fences characterized by rubber seals interposed between them.