Protective fence

Abstract

To increase the degree of freedom in the position of the lighting device in the height direction of a protective fence to which a lighting device is attached. [Solution] The protective fence 1 comprises two support posts 10 aligned along the X direction in which the road R extends, a first beam 20 and a second beam 30 supported by the support posts 10 and extending along the X direction, a rail 60 positioned between the two support posts 10 and extending along the X direction at a distance from the support posts 10, to which the lighting device 2 is attached, and a sleeve 40 connecting the support posts 10 and the rail 60. The sleeve 40 has a C-shaped cross-section that surrounds the wiring 2a of the lighting device 2 and has a sleeve opening OP1 that opens to the road R side.

Description

Technical Field

[0001] The present disclosure relates to a protective fence.

Background Art

[0002] Patent Document 1 discloses a protective fence installed on a road or a bridge. The protective fence includes a beam extending along the road and a plurality of columns supporting the beam at a predetermined height. The protective fence of Patent Document 1 can be equipped with a lighting device for illuminating the road surface. In the protective fence of Patent Document 1, the lighting device is arranged so as to hang down from the beam. That is, in the height direction of the protective fence of Patent Document 1, the position of the lighting device is determined by the position of the beam.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the protective fence of Patent Document 1 described above, the lighting device hanging down from the beam is located at a relatively high position. If the position of the lighting device is high, the driver may be dazzled and the safe driving of the vehicle may be impaired. Also, if the position of the lighting device is high, light may leak to places other than the road surface, and the impact on surrounding animals and plants is large. For these reasons, it is desired that the position of the lighting device can be freely set regardless of the position of the beam in the height direction of the protective fence.

[0005] The present disclosure has been made in view of the above, and an object thereof is to increase the degree of freedom in the position of the lighting device in the height direction of the protective fence to which the lighting device is attached.

Means for Solving the Problems

[0006] To achieve the above objective, a protective fence according to one aspect of the present disclosure comprises two posts aligned along the direction of extension of the road, a beam supported by the posts and extending along the direction of extension, a rail positioned between the two posts and extending along the direction of extension, to which a lighting device is attached, and a sleeve connecting the posts and the rail, wherein the sleeve has a C-shaped cross-section, surrounding the wiring of the lighting device and having a sleeve opening that opens to the road side.

[0007] According to this, the rails on which the lighting devices are attached are mounted to the support columns via sleeves. Furthermore, the positions of the rails and lighting devices in the height direction of the protective fence are determined regardless of the position of the beams. Therefore, the protective fence can have a high degree of freedom in the position of the lighting devices in the height direction of the protective fence.

[0008] Furthermore, in a protective fence according to one aspect of the present disclosure, the sleeve has sleeve through-holes through which bolts pass at each of the two ends on the road side, the support post has a support post through-hole through which the bolts pass, and the sleeve is attached to the support post by the bolts passing through the sleeve through-hole and the support post through-hole.

[0009] According to this, the sleeve is attached to the support column by two bolts. Therefore, the sleeve can be easily attached to the support column.

[0010] Furthermore, a protective fence according to one aspect of this disclosure further comprises a sleeve cover plate that covers the sleeve opening.

[0011] According to this design, the sleeve cover plate prevents water splashed by the vehicle from entering the inside of the sleeve through the sleeve opening between the support post and the rail. Therefore, it is possible to prevent the wiring of the lighting device from getting wet. In addition, the visibility of the wiring of the lighting device is reduced, improving the aesthetic appearance of the protective fence. Furthermore, it is possible to prevent the wiring of the lighting device from being cut due to vandalism or other reasons.

[0012] Furthermore, in a protective fence according to one aspect of the present disclosure, the sleeve has screw fitting portions at two ends on the road side into which screws for fixing the sleeve cover plate are fitted.

[0013] According to this design, there is no risk of interference between the screws used to secure the sleeve cover plate and other fastening components. Therefore, the sleeve cover plate can be attached to the sleeve in a stable manner.

[0014] Furthermore, in a protective fence according to one aspect of the present disclosure, the end of the rail is cylindrical, and the sleeve is connected to the rail on the inside of the end of the rail.

[0015] According to this design, the sleeve is inserted into the end of the rail. The sleeve has a C-shaped cross-section that opens to the road and has a top surface. Therefore, rain and other elements from above the rail are prevented from entering the rail from the end. Consequently, the wiring of the lighting device can be prevented from getting wet.

[0016] Furthermore, in a protective fence according to one aspect of the present disclosure, the rail comprises a rail bottom plate portion having a bottom surface and a projection portion projecting downward from the bottom surface.

[0017] According to this design, water adhering to the outer surface of the rail flows down to the protrusions, where it condenses into droplets and falls off. This improves the drainage of the rail.

[0018] Furthermore, in a protective fence according to one aspect of the present disclosure, the rail comprises a rail bottom plate portion having a rail through hole opening in its bottom surface.

[0019] According to this design, water that enters the inside of the rails will fall out through holes in the rails. This improves the drainage of the rails. [Effects of the Invention]

[0020] According to the protective fence of the present disclosure, the degree of freedom can be increased with respect to the position in the height direction of the lighting device.

Brief Description of the Drawings

[0021] [Figure 1] FIG. 1 is a view of the protective fence according to an embodiment of the present disclosure as viewed from the road side. [Figure 2] FIG. 2 is a partially enlarged view of the protective fence shown in FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view of the protective fence along the line III-III shown in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view of the protective fence along the line IV-IV shown in FIG. 3. [Figure 5] FIG. 5 is a partially enlarged cross-sectional view of the protective fence shown in FIG. 3. [Figure 6] FIG. 6 is a cross-sectional view of the protective fence along the line VI-VI shown in FIG. 2. [Figure 7] FIG. 7 is a cross-sectional view of the protective fence along the line VII-VII shown in FIG. 6. [Figure 8] FIG. 8 is a view showing a state in which the first rail cover plate, the second rail cover plate, and the sleeve cover plate are removed in the partially enlarged view of the protective fence shown in FIG. 2.

Embodiments for Carrying Out the Invention

[0022] Embodiments for carrying out the present disclosure will be described in detail with reference to the drawings. The present disclosure is not limited by the content described in the following description. In addition, the components described below include those that can be easily assumed by those skilled in the art and those that are substantially the same. Furthermore, the components described below can be combined as appropriate.

[0023] FIG. 1 is a view of the protective fence 1 according to an embodiment of the present disclosure as viewed from the road side. FIG. 2 is a partially enlarged view of the protective fence 1 shown in FIG. 1.

[0024] In the drawing, the direction in which road R extends is defined as the X direction. In the X direction, the side indicated by the arrow is defined as the +X side, and the opposite side of the +X side is defined as the -X side. The width direction of road R is defined as the Y direction. The Y direction corresponds to the direction in which road R and guardrail 1 are aligned. In the Y direction, the side indicated by the arrow is defined as the +Y side, and the opposite side of the +Y side is defined as the -Y side. Furthermore, the vertical direction is defined as the Z direction. In the Z direction, the side indicated by the arrow is defined as the +Z side (upper side), and the opposite side of the +Z side is defined as the -Z side (lower side). The Z direction corresponds to the height direction of guardrail 1.

[0025] Guardrail 1 is, for example, a vehicle guardrail. Guardrail 1 is positioned to extend along the X direction on one side of the road R in the Y direction. Specifically, guardrail 1 is positioned on foundation block B. Foundation block B is a structure that extends along the X direction on one side of the road R in the Y direction. Foundation block B is formed of concrete. Foundation block B protrudes from the road surface Ra of road R.

[0026] The protective fence 1 comprises multiple support posts 10, a first beam 20 (corresponding to "beam"), a second beam 30 (corresponding to "beam"), multiple sleeves 40, multiple sleeve cover plates 50, and multiple rails 60.

[0027] Multiple support columns 10 are fixed to the foundation block B. The multiple support columns 10 are arranged so as to be spaced apart from each other along the X direction.

[0028] Figure 3 is a cross-sectional view of the protective fence 1 along the line III-III shown in Figure 2. Figure 4 is a cross-sectional view of the protective fence 1 along the line IV-IV shown in Figure 3. Figure 5 is a partially enlarged cross-sectional view of the protective fence 1 shown in Figure 3.

[0029] As shown in Figure 3, the support column 10 comprises a base 11, a web plate 12, and a flange plate 13. The base 11, web plate 12, and flange plate 13 are integrally formed.

[0030] The base 11 is fixed to the foundation block B, for example, by anchor bolts AB. The web plate 12 is positioned to extend from the base 11 along the Z direction. The width direction of the web plate 12 is along the Y direction.

[0031] As shown in Figures 4 and 5, the web plate 12 has a first web hole 12a through which the wiring 2a of the lighting device 2 (described later) passes, and two second web holes 12b (corresponding to "support column through holes") through which the bolts Ba (described later) pass. The first web hole 12a and the second web holes 12b are positioned between the first beam 20 and the second beam 30 in the Z direction.

[0032] As shown in Figure 3, the flange plate 13 is positioned around the periphery of the web plate 12. The flange plate 13 is U-shaped, with the -Z side open when viewed along the X direction, and together with the base 11, it surrounds the web plate 12. As shown in Figure 4, the cross-sectional shape of the support column 10, cut by a plane perpendicular to the Z direction, is H-shaped.

[0033] As shown in Figures 1 and 2, the first beam 20 is positioned to extend along the X direction and is supported by the column 10. The first beam 20 comprises a plurality of first beam members 21. The plurality of first beam members 21 are connected to one another. As shown in Figure 3, the first beam members 21 are cylindrical and are fixed to the flange plate 13 at the top of the column 10, for example, by bolts and nuts BN1.

[0034] As shown in Figures 1 and 2, the second beam 30 is positioned between the first beam 20 and the foundation block B, extending along the X direction, and is supported by the support column 10. In other words, the second beam 30 is located on the -Z side of the first beam 20. The second beam 30 comprises a plurality of second beam members 31. The plurality of second beam members 31 are connected to one another. As shown in Figure 3, the second beam members 31 are cylindrical and are fixed to the flange plate 13 on the -Y side (road R side) of the support column 10, for example, by bolts and nuts BN2.

[0035] The first beam 20 and the second beam 30 prevent vehicles traveling on road R from deviating from road R.

[0036] The sleeve 40 shown in Figures 3 and 4 connects the support column 10 and the rail 60. The sleeve 40 is positioned between the first beam 20 and the second beam 30 in the Z direction. The sleeve 40 extends along the X direction and has a C-shaped cross-section with a sleeve opening OP1 in a cross-sectional shape cut by a plane perpendicular to the X direction. The sleeve opening OP1 opens to the -Y side (road R side). As shown in Figure 4, the sleeve 40 is positioned on both sides of the web plate 12 in the X direction.

[0037] As shown in Figure 5, the sleeve 40 is positioned on the web plate 12 so as to surround the first web hole 12a when viewed along the X direction. The sleeve 40 has a sleeve bottom plate portion 41 on the -Z side, a sleeve top plate portion 42 having a top surface 42a on the +Z side, and a sleeve connecting plate portion 43 that connects the sleeve bottom plate portion 41 and the sleeve top plate portion 42 on the +Y side. The sleeve bottom plate portion 41, the sleeve top plate portion 42, and the sleeve connecting plate portion 43 are integral. The cross-sectional shapes of the sleeve bottom plate portion 41, the sleeve top plate portion 42, and the sleeve connecting plate portion 43 may be straight or curved.

[0038] As shown in Figures 4 and 5, the sleeve bottom plate portion 41 and the sleeve top plate portion 42 each have sleeve through holes 40b along the X direction at the -Y side end. The sleeve through holes 40b are located at each of the two ends on the road R side. The two sleeve through holes 40b correspond to the two second web holes 12b in the web plate 12. The bolts Ba that constitute the bolt nut BN3 pass through the two sleeve through holes 40b and the two second web holes 12b.

[0039] Two sleeves 40, positioned on a single web plate 12, are attached to the web plate 12 by two bolts and nuts BN3. One bolt Ba passes through one second web hole 12b and one sleeve through-hole 40b in each of the two sleeves 40. Therefore, the two sleeves 40 can be efficiently attached to a single support column 10 using only two bolts and nuts BN3.

[0040] Furthermore, the two sleeve through holes 40b in a single sleeve 40 are located at different positions in the Z direction. Therefore, the mounting strength of the sleeve 40 against the load of the rail 60 connected to the sleeve 40 and the load of the lighting device 2 arranged on the rail 60 as described later can be improved.

[0041] The sleeve cover plate 50 covers the sleeve opening OP1. The sleeve cover plate 50 is fixed to the -Y side of the sleeve 40 via screws N1. Screws N1 engage with the screw-fitting portions 40c of the sleeve 40. The screw-fitting portions 40c are located at two ends of the sleeve 40 on the road R side. Specifically, the screw-fitting portions 40c are located on the road R side of the sleeve through-hole 40b in both the sleeve bottom plate portion 41 and the sleeve top plate portion 42.

[0042] As shown in Figures 1 and 2, the rail 60 is positioned between two adjacent support columns 10 in the X direction, extending in the X direction while being separated from the support columns 10. The rail 60 is positioned between the first beam 20 and the second beam 30 in the Z direction.

[0043] As shown in Figure 2, when viewing the guardrail 1 from the road R side, the sleeve cover plate 50 can be seen through the gap C between the support post 10 and the rail 60. As shown in Figure 3-5, the rail 60 comprises a rail body 61, a first rail cover plate 62, and a second rail cover plate 63.

[0044] The rail body 61 extends along the X direction and has a C-shaped cross-section with a rail opening OP2 in a cross-sectional shape when cut by a plane perpendicular to the X direction. As shown in Figure 5, the rail opening OP2 opens to the -Y side (road R side).

[0045] The rail body 61 has a rail bottom plate portion 61a having a bottom surface 61a1 on the -Z side, a rail top plate portion 61b on the +Z side, and a rail connecting plate portion 61c that connects the rail bottom plate portion 61a and the rail top plate portion 61b on the +Y side. The rail bottom plate portion 61a, the rail top plate portion 61b, and the rail connecting plate portion 61c are integrally formed.

[0046] The cross-sectional shape of the rail base plate portion 61a is bent so that the top is on the -Z side. The rail base plate portion 61a has a protruding portion 61a2 and a rail through hole 61a3.

[0047] The protruding portion 61a2 extends downward (towards the -Z side) from the bottom surface 61a1. The protruding portion 61a2 is plate-shaped and extends along the X direction. Furthermore, the protruding portion 61a2 is positioned to be continuous with the rail connecting plate portion 61c. In addition, the protruding portion 61a2 is hidden at the top of the rail bottom plate portion 61a when the rail 60 is viewed from the -Y side (road R side). This improves the aesthetic appearance of the guardrail 1.

[0048] Needless to say, the position of the protruding portion 61a2 is not limited to a position continuous with the rail connecting plate portion 61c; for example, it may be a position where the protruding portion 61a2 is visible when the rail 60 is viewed from the -Y side (road R side).

[0049] The rail through-hole 61a3 penetrates the rail base plate portion 61a and opens to the bottom surface 61a1. The rail through-hole 61a3 is located at the position furthest to the -Z side of the rail base plate portion 61a. Although there is only one rail through-hole 61a3 shown in the figure, there may be multiple. Furthermore, it goes without saying that the position of the rail through-hole 61a3 in the X direction is not limited to the position shown in the figure.

[0050] The first rail cover plates 62 are positioned at both ends of the rail body 61 (Figure 1) and cover the rail opening OP2. The first rail cover plates 62 are fixed to both ends of the rail body 61 on the -Y side via screws N2. In this way, two first rail cover plates 62 are positioned on one rail body 61.

[0051] The second rail cover plate 63, shown in Figures 1 and 2, is positioned between the two first rail cover plates 62 on the rail body 61 and covers the rail opening OP2. The second rail cover plate 63 is fixed to both ends of the rail body 61 on the -Y side via screws. The second rail cover plate 63 has a light-transmitting portion 63a in the center in the X direction.

[0052] In this way, by arranging the first rail cover plate 62 and the second rail cover plate 63 on the rail body 61, the rail 60 becomes cylindrical.

[0053] Furthermore, as shown in Figures 4 and 5, a sleeve 40 is inserted inside the end of the rail 60. The sleeve 40 connects to the rail 60 inside the end of the rail 60. Specifically, the sleeve 40 and the rail body 61 are fixed together by bolts and nuts BN4 with the sleeve connecting plate portion 43 and the rail connecting plate portion 61c in contact.

[0054] When the rail 60 is viewed from the -Y side (road R side), the first rail cover plate 62 and the sleeve cover plate 50 overlap each other. When the sleeve 40 is fixed to the rail 60, the first rail cover plate 62 and the sleeve cover plate 50 are separated. When the first rail cover plate 62 is removed, the sleeve cover plate 50 can be removed.

[0055] Furthermore, as shown in Figures 1 and 2, a lighting device 2 is installed on the inside of the rail 60. The lighting device 2 has a shape that extends along the X direction. When viewed from the -Y side (road R side), the lighting device 2 overlaps with the second rail cover plate 63. The light emitted by the lighting device 2 passes through the light-transmitting portion 63a and illuminates the road surface Ra.

[0056] Figure 6 is a cross-sectional view of the protective fence 1 along the line VI-VI shown in Figure 2. Figure 7 is a cross-sectional view of the protective fence 1 along the line VII-VII shown in Figure 6.

[0057] As shown in Figures 6 and 7, the lighting device 2 is fixed to the rail 60 via a first mounting member 71 and a second mounting member 72. The first mounting member 71 and the second mounting member 72 are positioned on both sides of the lighting device 2 in the X direction.

[0058] The first mounting member 71 has an L-shaped cross-section and includes a rail fixing portion 71a and a first relay portion 71b. The rail fixing portion 71a and the first relay portion 71b are integral. The rail fixing portion 71a is fixed to the rail connecting plate portion 61c by a screw N3.

[0059] The second mounting member 72 has an L-shaped cross-section and includes a lighting fixing portion 72a and a second relay portion 72b. The lighting fixing portion 72a and the second relay portion 72b are integral. The lighting fixing portion 72a secures the lighting device 2 with a screw N4.

[0060] The first relay section 71b and the second relay section 72b are connected by a screw N5. As a result, the orientation of the second relay section 72b relative to the first relay section 71b can be adjusted by rotating the second relay section 72b around the central axis of the screw N5. In other words, the orientation of the lighting device 2 relative to the rail 60 can be adjusted by rotating the lighting device 2 around the central axis of the screw N5, thereby adjusting the range over which the road surface Ra is illuminated.

[0061] Figure 8 is a partially enlarged view of the protective fence 1 shown in Figure 2, showing the state in which the first rail cover plate 62, the second rail cover plate 63, and the sleeve cover plate 50 have been removed. The first rail cover plate 62, the second rail cover plate 63, and the sleeve cover plate 50 are removed, for example, during maintenance of the lighting device 2.

[0062] The wiring 2a of the lighting device 2 is arranged to extend along the X direction from each end of the lighting device 2. The wiring 2a of the lighting device 2 passes inside the rail 60, inside the sleeve 40, and through the first web hole 12a. In other words, the sleeve 40 surrounds the wiring 2a of the lighting device 2.

[0063] As described above, according to this embodiment, the guardrail 1 comprises two support posts 10 aligned along the X direction in which the road R extends, a first beam 20 and a second beam 30 supported by the support posts 10 and extending along the X direction, a rail 60 arranged between the two support posts 10 and extending along the X direction at a distance from the support posts 10, to which the lighting device 2 is attached, and a sleeve 40 connecting the support posts 10 and the rail 60. The sleeve 40 has a C-shaped cross-section that surrounds the wiring 2a of the lighting device 2 and has a sleeve opening OP1 that opens to the road R side.

[0064] According to this, the rail 60 to which the lighting device 2 is attached is attached to the support column 10 via the sleeve 40. Furthermore, the position of the rail 60 and the position of the lighting device 2 in the height direction (Z direction) of the protective fence 1 are determined regardless of the positions of the first beam 20 and the second beam 30. Therefore, the protective fence 1 can have a high degree of freedom in the position of the lighting device 2 in the height direction of the protective fence 1.

[0065] Furthermore, the sleeve 40 has a C-shaped cross-section that opens to the road R side and has a top surface 42a. Therefore, the sleeve 40 prevents the wiring 2a of the lighting device 2 located inside from getting wet from rain or other elements coming from above the sleeve 40. In addition, the sleeve 40 has a sleeve opening OP1, which makes maintenance of the lighting device 2 easier.

[0066] Furthermore, the sleeve 40 has sleeve through-holes 40b at each of its two ends on the road R side, through which bolts Ba pass. The support column 10 has a second web hole 12b through which bolts Ba pass. The sleeve 40 is attached to the support column 10 by bolts Ba passing through the sleeve through-holes 40b and the second web hole 12b.

[0067] According to this, the sleeve 40 is attached to the support column 10 by two bolts Ba. Therefore, the sleeve 40 can be easily attached to the support column 10.

[0068] Furthermore, the protective fence 1 is further equipped with a sleeve cover plate 50 that covers the sleeve opening OP1.

[0069] According to this, the sleeve cover plate 50 prevents water splashed by the vehicle from entering the inside of the sleeve 40 through the sleeve opening OP1 via the gap C (Figures 2 and 4) between the support column 10 and the rail 60. Therefore, it is possible to prevent the wiring 2a of the lighting device 2 from getting wet. In addition, the sleeve cover plate 50 prevents the wiring 2a of the lighting device 2 from being visible through the gap C, thereby improving the aesthetic appearance of the protective fence 1. Furthermore, it is possible to prevent the wiring 2a of the lighting device 2 from being cut due to vandalism or the like.

[0070] Furthermore, the sleeve 40 has screw fitting portions 40c at two ends on the road R side into which screws N1 for fixing the sleeve cover plate 50 are fitted.

[0071] According to this, there is no risk of interference between the screw N1 used to fix the sleeve cover plate 50 and other fixing members (e.g., bolt Ba). Therefore, the sleeve cover plate 50 can be attached to the sleeve 40 in a stable state.

[0072] Furthermore, the end of the rail 60 is cylindrical. The sleeve 40 connects to the rail 60 on the inside of the end of the rail 60.

[0073] According to this, the sleeve 40 is inserted into the end of the rail 60. The sleeve 40 has a C-shaped cross-section that is open to the road R side and has a top surface 42a. Therefore, rain and other elements from above the rail 60 are prevented from entering the rail 60 from the end of the rail 60. Consequently, the lighting device 2 and the wiring 2a of the lighting device 2 are prevented from getting wet.

[0074] Furthermore, the rail 60 includes a rail bottom plate portion 61a having a bottom surface 61a1, and a protruding portion 61a2 that protrudes downward from the bottom surface 61a1.

[0075] According to this, water adhering to the outer surface of the rail 60 is transmitted to the protrusion 61a2, where it falls as droplets at the tip of the protrusion 61a2. This improves the drainage performance of the rail 60.

[0076] Furthermore, the rail 60 includes a rail bottom plate portion 61a having a rail through hole 61a3 that opens into the bottom surface 61a1.

[0077] According to this, water that enters the inside of the rail 60 will fall out through the rail penetration hole 61a3. This improves the drainage of the rail 60.

[0078] While preferred embodiments of this disclosure have been described above, this disclosure is not limited to such embodiments. The content disclosed in the embodiments is merely an example, and various modifications are possible without departing from the spirit of this disclosure. Any modifications made without departing from the spirit of this disclosure will naturally fall within the technical scope of this disclosure.

[0079] For example, the rail 60 and the lighting device 2 may be positioned below the second beam 30.

[0080] Furthermore, the sleeve 40 may be fixed to the web plate 12 by welding, for example, without using bolts and nuts. [Explanation of symbols]

[0081] 1 Protective fence 2. Lighting device 2a Wiring of lighting equipment 10 posts 12b Second web hole (hole through the support column) 20. First beam (beam) 30. Second beam (beam) 40 sleeves 40b Sleeve through hole 40c Screw-fitting section 41 Sleeve bottom plate section 50 Sleeve Cover Boards 60 rails 61a Rail base plate section 61a1 Bottom 61a2 Protrusion 61a3 Rail through hole OP1 Sleeve opening R road

Claims

1. Multiple support pillars are lined up along the direction in which the road extends, A beam supported by the aforementioned support column and extending along the extension direction, A rail is positioned between two adjacent support columns, separated from the support columns, and extends along the extension direction, to which a lighting device is attached. The system includes a sleeve that connects the support column and the rail, The sleeve has a C-shaped cross-section, surrounding the wiring of the lighting device and having a sleeve opening that opens to the road side. Protective fence.

2. The sleeve has through-holes in each of its two ends on the road side through which bolts pass. The support column has a through-hole through which the bolt passes, The sleeve is attached to the support column by the bolt passing through the sleeve through hole and the support column through hole. The protective fence according to claim 1.

3. The sleeve cover plate further covers the sleeve opening, The protective fence according to claim 1.

4. The sleeve has screw-fitting portions at two ends on the road side into which screws for fixing the sleeve cover plate are fitted. The protective fence according to claim 3.

5. The end of the rail is cylindrical, The sleeve connects to the rail on the inside of the end of the rail. The protective fence according to claim 1.

6. The aforementioned rail is A rail base plate having a bottom surface, It comprises a protruding portion that extends downward from the bottom surface, The protective fence according to claim 1.

7. The rail comprises a rail bottom plate portion having a rail through hole opening in the bottom surface. The protective fence according to claim 1.

Images