Falling object prevention wall

Abstract

To provide a falling object prevention wall which is less likely to form a shade and is excellent in appearance.SOLUTION: A falling object prevention wall 100 includes a frame 110. The frame 110 is obtained by assembling a rod-shaped body into a rectangular shape, and has both opened surfaces. The openings are stretched in a state in which a film material 120 is tensioned. The film material 120 has solar radiation permeability, solar transmittance of 80% or more, and a thickness of 1.5 mm or less.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a falling object prevention wall provided along a highway, for example, frequently seen on highways, and used for the purpose of preventing objects from falling from the highway.

Background Art

[0002] Most highways are elevated. Also, in general roads, especially at intersections, an elevated structure is adopted. Various objects may fall from elevated roads. For example, garbage lying on the road may come into contact with a moving vehicle and be bounced off, falling from the elevated road. Also, a person driving a vehicle on an elevated road may throw garbage out of the window, and in that case too, the garbage will fall from the elevated road. In addition, there may be puddles on the road, and when a vehicle passes over them, the splashed water will fall from the elevated road. Or, for example, in the event of an accident, a motorcycle or its rider may fall from the elevated road. These falling objects are dangerous to people below the elevated road, so the falling of these objects from the elevated road should be prevented. In particular, the fall of a motorcycle rider can have a significant impact not only on the people below the elevated road but also on the rider's own body and life, so its prevention is more strongly desired.

Summary of the Invention

Problems to be Solved by the Invention

[0003] For the purpose of preventing objects from falling from an elevated road as described above, a falling object prevention wall, which is a wall, may be provided along the elevated road. Generally, the falling object prevention wall is composed of a plate. The plate usually has no light transmissivity. Therefore, when such a falling object prevention wall is provided beside an elevated road, depending on the angle of the sun, the road may become dark in its shade, and it is also not excellent in terms of aesthetics. In addition, although the falling object prevention wall made of a plate serves the function of preventing falling objects, for example, when a motorcycle rider hits the falling object prevention wall in the event of an accident, even if the fall from the elevated road downward can be prevented, the contact with the falling object prevention wall itself may have a significant impact on the rider's body and life.

[0004] An object of the present invention is to provide a falling object prevention wall that is difficult to create shadows, has excellent aesthetics, and enhances the possibility of protecting the body and life of a motorcycle rider in the event of an accident.

Means for Solving the Problem

[0005] To solve such a problem, the inventor of the present application proposes the following invention. The present invention relates to a falling object prevention wall arranged along an elevated road. This falling object prevention wall includes a frame having a shape formed by arranging rod-shaped bodies in a rectangular shape in side view with both side surfaces open, and a film material stretched across the inside of the frame. This falling object prevention wall is different from the conventional falling object prevention wall made of a plate. Except for the frame, it is basically composed of a film material. The film material is a material that easily provides translucency. Therefore, the falling object prevention wall of the present invention is difficult to create shadows and has excellent aesthetics. In addition, generally, the film material has a stretching property at least compared to a plate, so that when an accident occurs and a motorcycle rider hits the falling object prevention wall, the impact generated can be absorbed by the stretching of the film material. Therefore, according to this falling object prevention wall, the possibility of protecting the body and life of a motorcycle rider in the event of an accident is increased.

[0006] The film material used for the falling object prevention wall of the present invention may be either a woven fabric or a knitted fabric, or may be a material obtained by coating at least one surface of them with a resin. The resin is, for example, ETFE (ethylene tetrafluoroethylene copolymer) or other Teflon resins. Further, the film material may not include woven fabrics or knitted fabrics. In that case, the film material becomes a film composed only of a resin, for example, ETFE (ethylene tetrafluoroethylene copolymer) or other Teflon resins. The film material is not limited to this, but may have solar transmittance. Thereby, it becomes easier to prevent the formation of shade derived from the falling object prevention wall on the elevated road, and it becomes possible to improve the aesthetic appearance of the falling object prevention wall. The solar transmittance of the film material can be, for example, 80% or more. Thereby, it has transparency like glass, sunlight can be obtained in the vicinity of the highway, and the effect of eliminating the sense of oppression on the driver can be obtained. The film material is not necessarily limited to this, but their thickness can be 1.5 mm or less. Thereby, since it is lightweight, the effect of being easy to handle during on-site installation can be obtained. Not limited to this, the elongation at break of the film material in the falling object prevention wall of the present invention can be 200 to 500%. According to this, the falling object prevention wall can exhibit appropriate cushioning properties with respect to the motorcycle driver who came into contact with the film material during an accident, and the possibility of protecting the body and life of the motorcycle driver during an accident is increased. Not limited to this, the film material in the falling object prevention wall of the present invention may be provided with tension. Thereby, the effect that the frame and the film of the falling object prevention wall are structurally integrated and stabilized can be obtained. The frame may or may not include a mechanism for applying tension to the film material.

[0007] In the falling prevention wall of the present application, it does not matter what method is used to fix the film material to the frame. Further, as long as the film material is stretched so as to close the hollow portion of the frame, the mutual relationship such as the positional relationship between the two can be freely determined. For example, a thick portion having a thickness greater than that of the film material is provided at the edge of the film material, and the frame has a width greater than the thickness of the film material and smaller than the thickness of the thick portion, and has a slit with one end open, and communicates with the other end of the slit and has a space capable of positioning the thick portion therein. A thick portion storage portion is provided. The frame includes a frame body configured in a shape in which the rod-shaped bodies are assembled into a rectangle in a side view, and a long member attached to each of the four rod-shaped bodies, and is a thick portion storage member that can be detachably fixed to the frame body provided with the thick portion storage portion. And, in the space of the thick portion storage portion of each of the four thick portion storage members, the thick portions on the four sides of the film material are stored, and with the slit of the thick portion storage portion passing through the film material, each of the thick portion storage members is fixed to the rod-shaped body of the frame body respectively, so that the film material can be fixed to the frame. In this case, there are four thick portion storage members which are long members, and each corresponds to each side of the film material. Each thick portion storage member includes a thick portion storage portion. If the frame is composed of a frame body and four thick portion storage members having the above-mentioned thick portion storage portions, with the thick portions provided along the edge of the film material inserted into the space of the thick portion storage portion in each thick portion storage member, the film material can be fixed to the frame simply by fixing each thick portion storage member to the frame body, so that the attachment and detachment of the film material to the frame can be easily performed. Further, by appropriately positioning the positional relationship between the frame body and the thick portion storage member, it becomes possible to automatically apply an appropriate tension to the film material fixed to the frame by fixing the thick portion storage member to the frame body. Although not limited thereto, the thick portion may be provided over the entire circumference of each side of the film material, for example, excluding the four corners. Although not limited thereto, the thick portion storage portion can have substantially the same length as each rod-shaped body constituting the frame body. The mutual relationships already described regarding the space of the thick portion, the slit, and the thick portion storage portion make it possible to store the thick portion of the film material in the space of the thick portion storage portion of the frame, and to take out the thick portion stored in the space of the thick portion storage portion from the space of the thick portion storage portion, but not to easily fall off from that space. As long as that purpose is achieved, the configuration of the space of the thick portion, the slit, and the thick portion storage portion can be appropriately determined. For example, the thick portion can be formed by passing a long rope or a rod-shaped body made of rubber or the like through a long hole along the edge of the film material formed by folding back the vicinity of the edge of the film material and connecting the edge of the film material to a position slightly closer to the center of the film material by an appropriate method such as sewing, welding, or adhesion. The cross-sectional shape of the thick portion is also free, and the space of the thick portion storage portion does not necessarily need to correspond to the shape of the thick portion or the like. The fall prevention wall of the present application has a smooth continuous surface on the side facing the road of the frame, and the surface of the film material facing the road and the surface of the frame facing the road may form a smooth continuous surface. If the surfaces of the frame and the film material facing the road form a smooth continuous surface, there will be no portion protruding toward the road on the surface of the fall prevention wall facing the road. Therefore, for example, in the case of a curved road when a motorcycle or a driver collides with the fall prevention wall, it is possible to suppress the occurrence of a situation where a shear stress acts on the fall prevention wall. In addition, by adopting such a structure, it becomes possible to attach and detach the film material to and from the frame only by performing work from the road side, so it is also possible to obtain the effect of improving workability when installing or replacing the film material. The smooth continuous surface constituted by the surfaces of the frame and the film material facing the road may be a flat surface or a curved surface that bends along the road. To make the surface of the frame and the membrane material facing the road a smooth continuous surface, it is possible to select from known and well-known techniques. For example, when adopting the above-described configuration in which the thick portion is provided at the edge of the membrane material, the surface of the frame and the membrane material facing the road can be made a smooth continuous surface as follows. When the thick portion is provided at the edge of the membrane material and the frame is composed of the frame body and the thick portion housing member as described above, it is possible to adopt a configuration in which one end of the slit is open to the surface facing the road. In this case, the following state occurs when the thick portion housing member is fixed to the frame body. That is, for example, considering the side cross section of the membrane material, the membrane material that comes out of the slit that is open to the surface facing the road in the thick portion housing member attached to the upper rod-shaped body of the frame will bend downward as soon as it comes out of the slit. Thus, on the upper rod-shaped body of the frame, the surface of the rod-shaped body facing the road and the surface of the membrane material facing the road become a smooth continuous surface. The same thing also occurs with the members on the lower side, right side, and left side of the frame. Therefore, by adopting such a method, the surface of the frame and the membrane material facing the road can be easily made a smooth continuous surface.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0010] FIG. 1 is a plan view showing the installation state of the falling object prevention wall 100 in this embodiment. Although not limited to this, the falling object prevention wall 100 in this embodiment is built along the elevated expressway H. Not limited to along the expressway H, the falling object prevention wall 100 can be provided along an elevated general road. The falling object prevention wall 100 is somewhat long. Further, the falling object prevention wall 100 may be linear in plan view along the expressway H, may be zigzag in plan view, or may be a combination thereof. Although not limited to this, the falling object prevention wall 100 in this embodiment is built along both sides of the expressway H.

[0011] FIG. 2 shows an enlarged view of one of the two falling object prevention walls 100 on both sides of the expressway H. The falling object prevention wall 100 in FIG. 1 was curved in plan view along the expressway H, but FIG. 2 shows a linear portion of the falling object prevention wall 100 in plan view. If it is desired to make the length of the falling object prevention wall 100 longer, the length of the falling object prevention wall 100 shown in FIG. 2 may be made longer, or a plurality of the falling object prevention walls 100 shown in FIG. 2 may be connected.

[0012] The falling object prevention wall 100 includes a frame 110 and a film material 120. The frame 110 includes four rod-shaped bodies assembled in a rectangle. The front and rear of the frame 110 in FIG. 2 are open. The height of the frame 110 may follow the height of the conventional falling object prevention wall. The frame 110 may be configured by assembling four rod-shaped bodies, or may have other configurations, for example, be an integral object. The same applies to the frame body described later. The film material 120 has a horizontally long and elongated rectangular shape. The opening of the frame 110 and the film material 120 are substantially corresponding in size and shape. The film material 120 is fitted into the opening of the frame 110. In that state, the frame 110 has a function of supporting or fixing the four edges of the film material 120, for example, over their entire lengths. As long as that function is ensured, the frame 110 may be configured in any way. The fixing of the film material 120 to the frame 110 can be performed, for example, as follows. On the inner surface of the opening of an example frame 110, grooves with a predetermined depth for inserting the edges of the film material 120 are provided over the entire circumference of the opening. And the film material 120 fitted into the opening of the frame 110 has the edges of its four sides inserted into the above-described grooves (illustration omitted). In that state, the portion of the film material 120 inserted into the grooves is penetrated by bolts passing through the frame 110, and nuts are screwed onto the bolts, whereby the film material 120 can be fixed to the frame 110. Regardless of the configuration by which the film material 120 is fixed to the frame 110, although not limited to this, tension is applied to the film material 120. The magnitude of the tension can be, for example, 0.5 to 0.7 kN / m. As a method for applying tension to the film material 120 fixed to the frame 110, known or well-known techniques can be used. When tension is applied to the film material 120, the frame 110 may be provided with a structure for the purpose of applying tension to the film material 120, or may not be. The method of fixing the film material 120 to the frame 110 can be by known or well-known techniques. For example, while unwinding and stretching the film material wound in a roll shape, it can be continuously fixed to the frame 110.

[0013] The membrane material 120 can be either a woven fabric or a knitted fabric, or it can be a material with at least one of its surfaces coated with resin. The resin can be, for example, ETFE (ethylene tetrafluoroethylene copolymer) or other Teflon resins. Also, the membrane material 120 may not include woven or knitted fabrics. In that case, the membrane material 120 will be a film composed only of resin, such as ETFE (ethylene tetrafluoroethylene copolymer) or other Teflon resins. The membrane material 120, although not limited to this, has solar transmittance in this embodiment. Thereby, it becomes easier to prevent the formation of shadows from the falling object prevention wall on the elevated road, and it is possible to improve the aesthetic appearance of the falling object prevention wall. The solar transmittance of the membrane material 120 can be, for example, 80% or more. The membrane material 120 is not necessarily limited to this, but their thickness can be 1.5 mm or less. Also, although not limited to this, the elongation at break of the membrane material 120 in this embodiment can be 200 - 500%.

[0014] The falling object prevention wall 100 as described above prevents falling objects from falling downward from the elevated highway H. The function of preventing the falling objects from falling is borne by the membrane material 120. The falling objects are, for example, garbage, diving from puddles of water, motorcycles and their riders in case of an accident. When the rider contacts the falling object prevention wall 100 during an accident, the rider contacts the membrane material 120 that constitutes the falling object prevention wall 100. Then, the membrane material 120 with an elongation at break of 200 - 500% stretches and absorbs the impact when the rider hits the membrane material 120. Thereby, the body and life of the rider are protected.

[0015] <Modification Example> The falling prevention wall 100 according to the modification example is almost the same as that of the above-described embodiment. The fall prevention wall 100 according to the modified example also includes a frame 110 and a film material 120. As shown in FIG. 3, the surface of the frame 110 facing the road, the outermost road-side surface, is flat. In FIG. 3, the left side is the road side. The entire surface of the frame 110 facing the road may be flat, or even if there are recesses such as holes drilled or grooves formed in that flat surface, as long as the outermost road-side surface of the frame 110 is flat, it does not matter. And the surface of the film material 120 facing the road and the surface of the frame 120 facing the road may be flush. If the surfaces of the frame 110 and the film material 120 facing the road are flush and flat, there will be no protruding portion on the surface of the fall prevention wall 100 facing the road. For example, in the case where a motorcycle or a driver collides with the fall prevention wall on a curved road, a situation where shear stress acts on the fall prevention wall can be suppressed, so such a fall prevention wall 100 is highly safe.

[0016] In this case, the following methods can be adopted as the method of fixing the film material 120 to the frame 110. First, a thick portion 125 having a thickness greater than the thickness of the film material 120 is provided at the edge of the film material 120 (FIG. 4). The thick portion 125 may be provided over the entire circumference of the film material 120, but is not limited to this. In this embodiment, it is provided except for the four corner portions of the film material 120. For example, the thick portion 125 is formed by folding the vicinity of the edge of the film material 120 and connecting the edge of the film material 120 to a position slightly closer to the center of the film material 120 by an appropriate method such as sewing, welding, or adhesion. A long rod-shaped body made of a long rope, rubber, or the like is passed through a long hole along the edge of the film material 120 thus formed. In this embodiment, the long rod-shaped body 126 made of rubber is used to form the thick portion 125. It is also possible to form the thick portion 125 by sewing a rope or the like to the edge of the film material 120. Although not limited to this, in this embodiment, the four corners of the film material 120 are cut out in an arc shape as shown in FIG. 5. From both ends of the long hole formed by folding the film material 120 along each side of the film material 120, although not limited to this, in this embodiment, the rod-shaped body 126 slightly protrudes. On the other hand, a thick portion storage member 114 along the frame 110 is attached to each of the upper, lower, left, and right rod-shaped members of the frame 110, for example, near the inner surface (the lower side in FIG. 4) and on the side facing the road (the left side in FIG. 4). The thick portion storage member 114 is provided over the entire circumference of the frame 110, but is not limited to this. In this embodiment, it is provided except for the four corner portions of the frame 110. Also, although not limited to this, in this embodiment, its cross-sectional shape is the same in all parts. The thick portion storage member 114 forms part of the frame 110. To be precise, the portion of the frame 110 excluding the thick portion storage member 114 is the frame body 111, and the thick portion storage member 114 forms the frame 110 in combination with it. The thick portion storage member 114 is a long member along each side of the frame 110, that is, a long member, and along its length direction, it is provided with a thick portion storage portion described later. Although not limited to this, the cross-section perpendicular to the length direction of the thick portion storage member 114 in this embodiment is the same at all parts in its length direction. The thick portion storage member 114 in this embodiment is, although not limited to this, generally in a prismatic shape as a whole. Also, the thick portion storage member 114 does not necessarily have to be a single long member and may be configured by being divided into a plurality of parts. The thick portion storage member 114 is provided with a thick portion storage portion 115 as shown in FIG. 4. The thick portion storage portion 115 includes a slit 115A and a space 115B. The slit 115A is configured to be opened on the surface of the frame 110 facing the road when attached to the frame body 111. The width of the slit 115A is larger than the thickness of the membrane material 120 and smaller than the thickness of the thick portion 125. The space 115B in the thick portion storage portion 115 is made capable of storing the thick portion 125 of the membrane material 120 therein, and in this embodiment, it is an elongated hole with a cross-section slightly larger than the cross-section of the thick portion 125 and having a substantially circular shape. Here, the thick portions 125 existing along each side of the film material 120 are pushed into and stored in the space B in the thick portion storage portion 115 of the thick portion storage member 114 having a length corresponding to the length of that side. That is, the thick portions 125 on each side of the film material 120 are sequentially pushed into the space B in the thick portion storage portion 115 of the thick portion storage member 114, one portion corresponding to one side of the film material 120 at a time (FIG. 6(A)). This operation can be performed, for example, by pushing the thick portion 125 of the film material 120 into the space 115B in the thick portion storage portion 115 of the thick portion storage member 114 while moving from an arbitrary one end side to the other end side of one side of the film material 120. When pushing the thick portion 125 into the space 115B of the thick portion storage portion 115 in the thick portion storage member 114, the film material 120 is made to protrude from the slit 115B of the thick portion storage portion 115. Finally, the thick portion storage member 114 is attached to all sides of the film material 120 (FIG. 6(B)). At this time, the film material 120 is in a state of passing through the slit 115A. When the film material 120 is attached to the thick portion storage member 114 via the thick portion 125, the thick portion 125 of the film material 120 is in a state where it does not easily fall off from the space 125 in the thick portion storage portion 115 of the frame 110. And in this state, the thick portion storage member 114 is fixed to the frame body 111 to complete the frame 110. A method of fixing the two is sufficient if known or well-known techniques are used. For example, the two can be detachably fixed using bolts and nuts. The surfaces of the frame body 111 and the thick portion storage member 114 facing the road are smooth continuous surfaces, and in this embodiment, although not limited to this, they are configured to form a series of flat surfaces. By fixing the thick - part storage member 114 to the frame body 111, the membrane material 120 is fixed to the frame 110. At this time, for example, as shown in FIG. 4, the membrane material 120 that comes out of the slit opened on the surface facing the road in the upper - side member of the frame 110 will bend downward immediately after coming out of the slit. Thus, on the upper - side member of the frame 110, the surface of the member facing the road and the surface of the membrane material 120 facing the road become a smooth continuous surface. The same thing also occurs in the lower - side, right - side, and left - side members of the frame 110. Therefore, by adopting such a method, the surfaces of the frame 110 and the membrane material 120 facing the road can be easily made into a smooth continuous surface. Moreover, the attachment and detachment of the membrane material 120 to and from the frame 110 are easy, and it is also suitable for work from the road side. Also, if the size of the membrane material 120 and the size of the frame 110 (more precisely, the size of the frame body 111 and the thick - part storage member 114) are in an appropriate relationship, it is also possible to apply a desired tension to the membrane material 120 attached to the frame 110 when the thick - part storage member 114 is attached to the frame body 111. The relationship among the thick part 125, the slit 115A, and the space 115B of the thick - part storage part 115 is such that it is possible to store the thick part 125 of the membrane material 120 in the space 115B of the thick - part storage part 115 of the frame 110, and the thick part 125 stored in the space 115B of the thick - part storage part 115 can be taken out from the space of the thick - part storage part 115, but it is not easily dropped. This is for the purpose of achieving the above - mentioned goal. As long as the goal is achieved, the configuration of the thick part 125, the slit 115A, and the space 115B of the thick - part storage part 115 can be determined as appropriate.

[0017] In the above-described modification, the slit 115A of the thick-wall portion storage portion 115 provided in the thick-wall portion storage member 114 was open on the surface of the thick-wall portion storage member 114 facing the road when the thick-wall portion storage member 114 was fixed to the frame body 111. However, the slit 115A may be open in other directions. For example, the slit 115A in the thick-wall portion storage member 114 fixed to the rod-shaped body corresponding to a side of the frame body 111 may be open toward the side of the frame body facing that side (FIG. 7). When such a configuration is adopted, although the effect of making the surface of the frame 110 and the membrane material 120 facing the road a smooth continuous surface may be lost depending on the position where the slit 115A is opened, the effect that the membrane material 120 can be easily attached to and detached from the frame 110 by work from the road side, and the effect that when the thick-wall portion storage member 114 is attached to the frame body 111, it is possible to apply a desired tension to the membrane material 120 attached to the frame 110 are maintained.

Explanation of Reference Numerals

[0018] 100 Falling object prevention wall 110 Frame 120 Membrane material

Claims

1. A falling object prevention wall arranged along an elevated road, comprising a frame with an open interior, formed by arranging four rod-shaped bodies in a rectangular shape in side view; a film material made of fluororesin, without including woven fabric or knitted fabric, stretched across the inside of the frame; and having an elongation at break of the film material of 200 to 500%; tension is applied to the film material, such that the film material stretches when an impact is applied, a falling object prevention wall.

2. The film material has light transmittance, the falling object prevention wall according to Claim 1.

3. The solar radiation transmittance of the film material is 80% or more, the falling object prevention wall according to Claim 2.

4. The thickness of the film material is 1.5 mm or less, the falling object prevention wall according to Claim 1.

5. The outermost surface of the frame facing the road is a smooth continuous surface, and the surface of the film material facing the road and the surface of the frame facing the road form a smooth continuous surface, the falling object prevention wall according to Claim 1.

6. At the edge of the film material, a thick portion having a thickness greater than that of the film material is provided, which is composed of a rope or a rod-shaped body having a diameter greater than that of the film material, and the frame is provided with a thick portion storage portion having a width greater than that of the film material and smaller than the thickness of the thick portion, having a slit with one end open, communicating with the other end of the slit, and having a space capable of positioning the thick portion therein, the frame includes a frame body configured in a shape formed by arranging the rod-shaped bodies in a rectangular shape in side view, and a long member attached to each of the four rod-shaped bodies, and a thick portion storage member capable of detachably fixing to the frame body provided with the thick portion storage portion, and by storing the thick portions of the four sides of the film material in the spaces of the thick portion storage portions of the four thick portion storage members respectively, and passing the slits of the thick portion storage portions through the film material, and then fixing each of the thick portion storage members to the rod-shaped bodies of the frame body respectively, the film material is fixed to the frame, the falling object prevention wall according to Claim 1.

7. One end of the slit is open on the surface facing the road, the falling object prevention wall according to Claim 6.

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