JP5690010B1 - Line-of-sight guide for cable-type road protection fence - Google Patents

Abstract

[PROBLEMS] To ensure the safety of a vehicle with a cable-type road protection fence even if a vehicle collides with the protection fence while clearly showing the road alignment to the driver of the vehicle. Providing a gaze guidance sign for cable-type road protection fences that controls the next disaster to a minimum. A line-of-sight guide 1 for a cable-type road protection fence includes a reflector 2, a reflector holding part 3 that holds the reflector 2, a fitting part 4 that is fitted into a column upper end part 8, and a reflector holding A connecting portion 5 that connects the portion 3 and the fitting portion 4, and the reflector holding portion 3, the fitting portion 4, and the connecting portion 5 are each a continuous body made of an elastic body. The connecting part 5 has a predetermined connecting width (Lb) and is fitted with the reflector holding part 3. It is a hollow cylinder connecting the part 4. [Selection] Figure 2

Description

  The present invention relates to a line-of-sight guide for a cable-type road protection fence, and more particularly to a line-of-sight guide provided on a cable-type road protection fence composed of a cable stretched between columns and columns.

  A gaze guidance mark is a facility that is provided along the side or center of a road and clearly indicates the alignment of the road to the driver of the vehicle traveling on the road, that is, guides the gaze. Or "Deliniator". This gaze guidance mark is a facility that is installed in a section where the vehicle speed is fast, a section where the number of lanes or the width of the roadway changes, a sharp curve, or a section connected to a sharp curve, and alerts the driver of the vehicle. . In general, the motorway is installed at intervals of 50 m, so that the driver of the vehicle can also use it to check the distance between the vehicles. Further, in a cold region, this gaze guidance mark is also used as a snow pole, which is useful for preventing or reducing vehicle accidents during snowfall.

  FIG. 6 is a side view showing an example of a conventional road protection fence 30 to which the line-of-sight guide mark is attached. The road protection fence 30 is provided at a predetermined interval in a side portion or a center portion of the road, and a beam pipe 32 is connected to the columns 31 via a connection block 35. And the metal cap 33 is attached to the uppermost part of the support | pillar 31, and a gaze guidance mark is engage | inserted by this metal cap 33. FIG. Further, a terminal cap 34 is provided at the end of the beam pipe 32.

  The line-of-sight guidance mark basically supports the reflector that re-reflects and reflects the light beam from the vehicle headlamp, the reflector mounting portion that fixes the reflector, and the reflector and the reflector mounting portion. Generally, it is composed of a support post fixed to a cap or the like provided on the base plate. The reflector is generally a double-sided lens made of a synthetic resin such as an acrylic resin or a polycarbonate resin. Further, for the reflector mounting portion and the support column, for example, a metal such as die-cast aluminum alloy steel is generally used.

  Patent Document 1 discloses a reflector mounting structure and a mounting bracket in which a reflector can be easily attached to a guide specimen of a line-of-sight guide. Here, a concave portion that opens forward is formed in the guide specimen and a fitting portion is formed in the concave portion, and a mounting bracket is attached to the reflector, and a support portion that supports and fixes the reflector to the mounting bracket. Is formed by protruding forward. With these configurations, the reflector can be firmly fixed to the guide specimen. The head of the gaze guidance mark is provided with an insertion portion that is formed in a cylindrical shape with a rib on the outer peripheral surface and protrudes downward. The insertion portion is inserted into the cylindrical column from above, and the road It describes that a line-of-sight guide mark that can be erected on a side or the like is formed.

  Patent Document 2 discloses a reflective cap for a road protection fence post. Here, a reflector made of an elastic material that is attached to the column head by elasticity is described. Then, a detent projection is provided on the inner side of the elastic material cap that covers the support column, and this detent projection is brought into contact with the outer edge of the steel cap and fixed. Further, in the type having no detent projections, the elastic material cap hits and is fixed to the outer edge portion by elasticity. That is, a technique is described in which these elastic materials are fixed to the column head so that the steel cap does not come off.

  Patent Document 3 discloses a conventional cable-type road protection fence 40. FIG. 7A shows the configuration of the cable type road protection fence 40. 7B and 7C show the behavior of the column 41 and the guard cable 42 when the vehicle 45 collides with the cable-type road protection fence 40. FIG. In this cable type road protection fence 40, a guard cable 42 such as a wire rope is installed instead of the beam pipe 32 in the above-described protection fence 30 of FIG. The cable-type road protection fence 40 maintains the height of the guard cable 42 while the column 41 is broken at the time of a vehicle collision, so that the tension of the guard cable 42 bounces off the vehicle 45 and the vehicle 45 deviates from the lane. It has the feature of preventing this.

  That is, as shown in FIG. 7A, a pair of slits 44 opened at the upper end are provided on the left and right surfaces parallel to the road of the support column 41, and the four guard cables 42 a to 42 d are connected to the slit 44 of the support column 41. And are stretched at equal intervals through a spacing member 47 disposed in each column 41. A metal cap 43 is put on the head of the support column 41, and a strap 46 is wound around the outer periphery of the support column 41 under the uppermost guard cable 42a.

  Further, as shown in FIG. 7B, when the vehicle 45 collides with the guard cable 42, an impact force directed outward from the roadway is applied to the guard cable 42, and the column 41 with the opening of the slit 44 is moved outward. The bending force works. This guard cable 42 absorbs collision energy by extending, but if the impact force is large, the bend of the support column 41 also increases, and the uppermost guard cable 42a does not work with the “effect” by the strap 46. The inside of the slit 44 is slid upward, and the metal cap 43 jumps off and is detached from the support column 41.

  Furthermore, as shown in FIG.7 (c), when big impact force is added to the guard cable 42, the support | pillar 41 will bend | curve large and the slit 44 will open an opening | mouth. As a result, the strap 46 breaks and falls off the support column 41, and the guard cable 42b in the second stage is detached from the enlarged slit 44 and extends to guide the vehicle along the guard cable 42 while absorbing impact energy. .

JP 2012-97485 A Japanese Utility Model Publication No. 2-62910 Japanese Patent No. 5156845

  When the conventional gaze guidance mark is installed on the cable-type road protection fence in FIG. 7, that is, when the gaze guidance mark is installed instead of the metal cap provided on the column head of the cable-type road protection fence, There is a possibility that the guide mark may prevent the opening of the support slit of the cable-type road protection fence when the vehicle collides, and the support of the cable-type road protection fence may collapse. For this reason, there is a problem that the function of preventing the tension of the guard cable from bouncing off the vehicle and preventing the vehicle from deviating from the lane is not exhibited.

  Further, when a vehicle collision accident occurs, there is a risk that a secondary disaster may occur in a vehicle in the opposite lane due to the scattered gaze guidance mark. In other words, a gaze guidance mark provided for the purpose of improving the traffic safety of the vehicle, such as “specify the road alignment to the driver of the vehicle.” There is a problem that a secondary disaster will be caused.

  The purpose of this application is to solve such problems, clearly show the road alignment to the vehicle driver, and ensure the safety of the vehicle with the cable-type road protection fence even if the vehicle collides with the protection fence, and guide the line of sight The aim is to provide a gaze guidance mark for cable-type road protection fences that minimizes direct disasters and secondary disasters caused by scattering of signs.

In order to achieve the above object, a cable-type road guard fence gaze guidance mark according to the present invention is stretched across a pillar having a pair of slits opened at the upper end and spaced apart in the vertical direction. A cable-type road safety fence gaze guidance mark comprising: a reflector, a reflector holding portion that holds the reflector, a fitting portion that is fitted into an upper end portion of the column, and a reflector holding portion that fits A reflector holding part, a fitting part, and a connecting part are each a continuous body made of an elastic body, and the connecting part has a predetermined connecting width and holds the reflector. Is a hollow cylinder that connects the fitting part and the fitting part, and the fitting part is a cylinder that has a predetermined fitting length and is fitted into the upper end part of the column, and is stretched over the column to be fitted Penetrating through a cable tie wound around a cable The a, if the vehicle collides, characterized in that it is held in the cable-type road safety barrier through the binding band.

  With the above configuration, the cable-type road guard fence line-of-sight guide mark is normally detached from the support column by its elastic force by inserting an insertion portion made of an elastic body into the upper end portion of the support column and having a predetermined insertion length. When the vehicle collides, it is possible to flexibly deform and follow the opening of the pair of slits, and to easily remove the line-of-sight guide mark from the support column. The cable-type road guard fence functions to maintain the guard cable mounting height when the vehicle collides, and to rebound the vehicle by the cable tension. For this purpose, the uppermost guard cable must slide upward in the slit in the event of a vehicle collision, jump off the line-of-sight guide and remove it from the column. However, in the case where the fitting portion is an inelastic body and hardly follows in the circumferential direction without being deformed, the openings of the pair of slits are suppressed, and the line-of-sight guide is prevented from coming off the support column. As a result, there is a risk that the column will collapse as it is when the vehicle collides. On the other hand, when the fitting portion is an elastic body having a predetermined fitting length, an appropriate frictional force is normally maintained between the support column and the fitting portion, and when the vehicle collides. The frictional force is cut by the opening of the pair of slits provided in the support column, and the line-of-sight guide can be easily removed from the support column without causing the support column to collapse.

  In addition, with the above configuration, the cable-type road protection fence gaze guidance mark is provided with a cylindrical connecting portion that is an elastic body having a predetermined connecting width between the reflector holding portion and the fitting portion. When the vehicle collides, the fitting portion fitted into the column can be easily removed from the upper end of the column. That is, when a vehicle collides with a cable-type road protection fence, an impact force that pushes in the lateral direction is generated on the gaze guidance mark. The connecting portion is greatly bent and deformed by the lateral impact force when the vehicle collides. If it does so, a part of connection part may change in the direction which floats up, a fitting part will be pulled up, and it can make it easy to remove a gaze guidance mark from a support | pillar, without making a support pillar collapse.

  Furthermore, with the above configuration, the cable-type road guard fence gaze guidance mark is integrated with the reflector holding part, the fitting part, and the connecting part as a continuous body, so that it can be removed from the column when the vehicle collides. Even if it is a case, it will not separate and scatter. Furthermore, since each of the reflector holding part, the fitting part, and the connecting part is made of an elastic body, it is possible to minimize a secondary disaster caused by the scattering of the gaze guidance mark.

Further, the above-described configuration prevents the line-of-sight guide provided on the cable-type road protection fence from being scattered by being tied to the guard cable via the binding band when the vehicle collides. Therefore, it is possible to control a direct disaster and a secondary disaster due to scattering of the gaze guidance mark to a minimum.

  Moreover, it is preferable that the cable-type road guard fence line-of-sight guide is fitted to the upper end of the support so as to cover the vicinity of the slit from the upper part of the uppermost cable on which the fitting is stretched. As a result, when the vehicle collides, the uppermost guard cable slides upward in the slit and can be hooked on the fitting portion of the visual guidance mark so that the visual guidance mark can be easily jumped off. Furthermore, it is preferable to provide a notch part in the fitting part so that the jumping by the guard cable can be reliably performed.

  Moreover, it is preferable that the cable-type road protection fence gaze guidance mark is connected to a fitting portion having an outer diameter larger than the outer diameter of the connecting portion via a narrowed portion that is a band-shaped annular ring having an inclined connecting portion. . As a result, when the vehicle collides, the line-of-sight guide can be easily guided off the support column by the narrowed annular ring-shaped annular portion.

  Further, it is preferable that the cable-type road guard fence line-of-sight guide be provided with a reinforcing member that protrudes in a direction in which the cable is stretched on the inner surface of the reflector holding portion or the connecting portion. Thereby, it is possible to reduce the swing of the reflector due to strong winds or vehicle vibrations.

  As described above, according to the gaze guidance mark for cable-type road protection fence according to the present invention, the cable-type road protection is provided even if a vehicle collides with the protection fence while clearly showing the road alignment to the vehicle driver. It is possible to provide a gaze guidance mark for a cable-type road protection fence that secures the safety of the vehicle by the fence and controls the direct disaster and the secondary disaster due to the scattering of the gaze guidance sign to the minimum.

It is sectional drawing seen from the front which shows schematic structure of one Embodiment of the gaze guidance mark for cable type road protection fences which concerns on this invention. It is sectional drawing seen from the side surface which shows the gaze guidance mark for cable type road protection fences of FIG. It is a side view showing a schematic structure of an embodiment in a cable type road protection fence provided with a gaze guidance mark according to the present invention. It is a front view which shows the cable type road protection fence of FIG. It is explanatory drawing which shows the behavior of a cable type road protection fence and a line of sight guidance mark when a vehicle collides with the cable type road protection fence provided with the line-of-sight guidance mark according to the present invention. It is a side view which shows the Example of the general road protection fence where a gaze guidance mark is attached. It is explanatory drawing which shows the structure of a cable type road protection fence, and the behavior of a support | pillar and a cable when a vehicle collides with a cable type road protection fence.

  Below, it demonstrates in detail about embodiment of the gaze guidance mark 1 for cable type road protection fences which concerns on this invention using drawing. FIG. 1 shows a schematic configuration of one embodiment of a gaze guidance mark 1 for a cable-type road protection fence according to the present invention in a sectional view as seen from the front. FIG. 2 is a cross-sectional view of the cable-type road protection fence gaze guidance mark of FIG. 1 viewed from the side.

  The gaze guidance mark 1 is required when the cable-type road protection fence 10 is installed in the center of the road. In particular, in a snowy area, the reflector 2 must be installed at a height of 1.2 m from the road surface. Since the general height of the support 7 of the cable-type road protection fence 10 is about 1.0 m, the line-of-sight guide 1 is installed at the upper end 8 of the road protection fence 10 or a line-of-sight guide post is installed separately. There is a need to. The line-of-sight guidance mark 1 for a cable-type road protection fence according to the present invention is “directly reflected at a height of 1.2 m from the road surface by installing the line-of-sight guide mark 1 directly on the upper end portion 8 of the pillar of the type road protection fence 10. The standard of “installing the body 2” can be satisfied. In addition, the vehicle driver is alerted, for example, where the vehicle speed is high, the number of lanes or the width of the roadway changes, a sharp curve, or a section connected to a sharp curve. Play a role to confirm.

(Configuration of line-of-sight guide for cable-type road protection fences)
As shown in FIGS. 1 and 2, the cable-type road guard fence gaze guidance mark 1 includes a reflector 2, a reflector holding part 3, a fitting part 4, and a connecting part 5. The reflector 2 is the main body of the line-of-sight guide 1 and is a part that retroreflects the light source by the headlamp of the vehicle. In the present embodiment, the reflector 2 includes a first reflector 2 a provided on the surface of the line-of-sight guide 1 and a second reflector 2 b provided on the back surface of the line-of-sight guide 1. The shape of the reflectors 2a and 2b is basically a round shape, and is specified to be 70 mm to 100 mm in diameter. As the material of the reflector 2, for example, a synthetic resin such as an acrylic resin or a polycarbonate resin that does not easily cause deterioration in reflection performance, discoloration, or damage is adopted.

  The reflector holder 3 holds the reflector 2 in a detachable manner. Therefore, the reflector holder 3 is made of a material into which the reflector 2 can be fitted. Moreover, as shown in FIG.1 and FIG.2, the reflector reinforcement 14 protrudes from the reflector holding | maintenance part 3, and hold | maintains the space | interval of the 1st reflector 2a and the 2nd reflector 2b from the inside. The interior surrounded by the first reflector 2a, the second reflector 2b, and the reflector holder 3 is hollow for weight reduction. Further, a reflector holding portion shaking prevention reinforcing material 15 is provided below the reflector holding portion 3. This is to prevent the reflector 2 from being easily shaken by a strong wind or vehicle vibration due to the weight of the reflector 2 being reduced. Conventionally, aluminum alloy steel has been mainly used as the material for the reflector holding portion 3, but in the present invention, an elastic body such as synthetic rubber is used. For example, ethylene / propylene rubber (EPDM) or the like is used as the synthetic rubber. However, the synthetic rubber is not limited thereto, and any synthetic rubber that exhibits desired elasticity may be used.

The fitting portion 4 is a hollow cylinder having a predetermined fitting length (La) and fitted into the upper end portion 8 of the column, and is a cylinder in this embodiment. In the conventional road protection fence 30 shown in FIG. 6, a metal cap 33 is provided at the upper end portion of the column 31, and in the conventional cable type road protection fence 40 shown in FIG. Generally, a cap 43 is provided. In the line-of-sight guide 1 for a cable-type road protection fence according to the present invention, the fitting portion 4 is made of an elastic body and is fitted so as to cover the upper end 8 of the column 7 to fix the line-of-sight guide 1 to the column 7. . Further, as shown in FIG. 1, in this embodiment, a cut portion 24 indicated by a broken line is provided for the uppermost guard cable 6 a of the cable-type road protection fence 10. Although the shape of the notch part 24 shown in FIG. 1 is a rectangle, it is not restricted to this, For example, circular, an ellipse, etc. may be sufficient. Further, the fitting portion 4 is provided with a binding band through hole 12. The binding band 11 penetrates the binding band through hole 12 and is bound to the uppermost guard cable 6 a of the cable-type road protection fence 10.

  The connecting portion 5 is made of an elastic body, has a predetermined connecting width (Lb), and connects the reflector holding portion 3 and the fitting portion 4. By this connection width (Lb), the height (about 1.0 m) of the column 7 of the cable-type road protection fence 10 and the height (1.2 m) from the road surface of the reflector 2 defined in the snowy area described above. The height difference can be adjusted. Moreover, although the connection part 5 is a hollow cylinder, the connection part shaking prevention reinforcement material 13 for preventing shaking is provided inside. Thereby, the shake of the reflector 2 by a strong wind, vehicle vibration, etc. can be reduced.

(Outline of cable-type road protection fence with line-of-sight guide)
In FIG. 3, it shows with the side view which shows schematic structure of embodiment in the cable type road guard 10 provided with the gaze guidance mark 1 which concerns on this invention. FIG. 4 is a front view of the cable-type road protection fence 10 shown in FIG. 4A shows the cable-type road protection fence 10 in a front view, and FIG. 4B shows an enlarged front view of the slit 23 portion at the upper end of the column 7. Furthermore, in FIG.4 (c), the slit 23 of the support | pillar 7 upper end shown in FIG.4 (b) is shown in the AA cross section of FIG.4 (b).

  The cable-type road protection fence 10 includes a support 7 and a guard cable 6. In this embodiment, the support column 7 is a circular steel pipe, and for example, a steel pipe having a size of φ89.1 × 3.2 is used. The support column 7 is inserted into a cylindrical sleeve 16 that is vertically embedded in the ground. The sleeve 16 is provided with a bottom cover 18 at the bottom, and the upper portion is embedded so as to have a height substantially equal to the ground surface. The lower end of the column 7 is positioned and supported by positioning bolts 19 that penetrate the sleeve 16. The sleeve 16 has a drain hole 25 at the bottom, and an upper lid 17 is installed at the top to seal the gap between the sleeve 16 and the column 7.

  As shown in FIG. 4B and FIG. 4C, a pair of slits 23 that open to the upper end are provided at two upper portions of the support column 7 at opposite positions. The four-stage guard cables 6a to 6d pass through the cable penetration portion 26 of the slit 23. The positions in the height direction of the guard cables 6 a to 6 d are held by the cable interval holding member 21. FIG. 4B shows a side surface when the cable spacing member 21 is removed.

  For example, a wire rope (3 × 7) having a diameter of 18 mm is used as the guard cable 6, but is not limited to this size. The guard cable 6 is galvanized to prevent corrosion, but the surface of the galvanized surface may be further coated. The guard cable 6 is stretched across the slit 23 in the vertical direction of the column 7. 3 and 4, the guard cable 6 has four stages, but the number of stages is not limited to this. Furthermore, the strap 20 is wound around the outer periphery of the steel pipe around the support 7. The strap 20 is, for example, a stainless steel strip rounded into a circle.

(Behavior of cable-type road protection fence and gaze guidance sign when a vehicle collides)
FIG. 5 shows the behavior of the cable-type road protection fence 10 and the line-of-sight guidance mark 1 when the vehicle 22 collides with the cable-type road protection fence 10 to which the line-of-sight guidance mark 1 is attached. FIG. 5A shows a state before the vehicle 22 collides with the cable-type road protection fence 10. FIG. 5B shows a state in which the vehicle 22 has collided with the cable-type road protection fence 10 and the uppermost guard cable 6 a has been removed from the slit 23 of the column 7. FIG. 5 (c) shows a state where the second stage guard cable 6 b is detached from the slit 23 of the column 7 after the vehicle 22 collides with the cable-type road protection fence 10.

  As shown in FIGS. 5 (b) and 5 (c), a pair of slits 23 are provided at the upper end of the support column 7, and the four-stage guard cables 6a to 6d are slits of the support column 7 made of steel pipes. 23, and are stretched at equal intervals via cable interval holding members 21 arranged in the columns 7. A line-of-sight guide 1 having a reflector 2 directed in the traveling direction of the road is attached to the tip of the column 7. The fitting portion 4 of the line-of-sight guide 1 made of an elastic body has a predetermined fitting length (La) on the column 7 and is fitted on the column upper end 8. Therefore, the fitting portion 4 is attached without being detached from the column upper end portion 8 by an appropriate frictional force due to the elastic body. Moreover, in this embodiment, the strap 20 is wound around the outer periphery of the support | pillar 7 under the uppermost guard cable 6a.

As shown in FIG. 5B, when the vehicle 22 collides with the guard cable 6, an impact force (F) shown in FIG. 1 acts on the guard cable 6. The column 7 is bent outside the road in the event of a vehicle collision. For this reason, when viewed from the line-of-sight guide 1 itself, the impact force (F) acts in an obliquely upward direction. That is, this impact force (F) can be divided into components of a horizontal impact force (F _H ) and a vertical impact force (F _V ) as shown in FIG. This vertical impact force (F _V ) acts to slide upward in the slit 23 with respect to the uppermost guard cable 6a. As shown in FIG. 1, the fitting portion 4 is fitted into the upper end portion 8 of the column 7 so as to cover the vicinity of the slit 23 in the uppermost guard cable 6a stretched on the column 7 from above. Because it is. That is, the guard cable 6a locks the fitting portion 4 of the line-of-sight guide 1 and pushes it upward. The fitting portion 4 is provided with a cut portion 24, and the guard cable 6a can reliably lock the fitting portion 4 when the vehicle 22 collides.

  On the other hand, the slit 23 opens upward like a “C”. Since the fitting part 4 consists of an elastic body, it deform | transforms following this opening. Further, the frictional force between the upper end portion 8 of the support column and the fitting portion 4 is broken due to the deformation caused by the opening and the mutual contact area is reduced. As a result, there is no resistance element for the operation in which the uppermost guard cable 6a hooks the fitting portion 4 and pushes upward, and the line-of-sight guide 1 is bounced off and detached from the column 7. However, the line-of-sight guide 1 is held by the binding band 11 without being scattered from the cable-type road protection fence 10.

Further, the connecting portion 5 of the line-of-sight guide 1 receives a bending moment and bends and deforms outside the road by the vertical impact force (F _V ) shown in FIG. As a result, the cross-section of the annular connecting portion 5 is distorted, and particularly in the vicinity where it is connected to the fitting portion 4, a part of the ring is deformed in a floating direction. And the fitting part 4 integrated with the connection part 5 is pulled up by this deformation | transformation, and it can make it easy to remove | deviate the gaze guidance mark 1 from the support | pillar 7 without collapsing the support | pillar 7. FIG.

  Further, the connecting portion 5 is connected to the fitting portion 4 having an outer diameter larger than the outer diameter of the connecting portion 5 through a narrowed portion 9 that is an inclined band-like ring. With this shape, the fitting portion 4 can be easily detached from the support column 7. In this way, the connecting portion 5, the fitting portion 4, and the throttle portion 9 that are made of an elastic body and are integrated can be detached from the column upper end portion 8 of the column 7 in cooperation. The fitting length (La) of the fitting portion 4 and the connecting width (Lb) of the connecting portion 5 are adjusted so that they can be easily detached from the column upper end portion 8 of the column 7 in cooperation with the vehicle 22 at the time of collision. Is done.

  As shown in FIG. 5 (c), when a larger impact force is applied to the guard cable 6, the support column 7 is bent greatly and the slit 23 is also opened widely. As a result, the strap 20 breaks and falls off from the column 7 and the second-stage guard cable 6b is detached from the enlarged slit 23 and extends to guide the vehicle along the guard cable 6 while absorbing impact energy. . At this time, the line-of-sight guide 1 hangs from the guard cable 6 a of the cable-type road protection fence 10 via the binding band 11.

1 Line-of-sight guide mark or line-of-sight guide mark for cable type road protection fence 2 Reflector 2a 1st reflector 2b 2nd reflector 3 Reflector holding part 4 Insertion part 5 Coupling part 6, 42 Guard Cable, 6a top guard cable, 6b second guard cable, 6c third guard cable, 6d bottom guard cable, 7, 31, 41 strut, 8 strut upper end, 9 aperture, 10 line of sight Cable type road guard fence with guide mark, 11 tie band, 12 tie band through-hole, 13 connecting part anti-vibration reinforcing material, 14 reflector reinforcing material, 15 reflector holding part anti-vibration reinforcing material, 16 sleeve, 17 upper lid, 18 Bottom cover, 19 Positioning bolt, 20, 46 Strap, 21, 47 Cable spacing retainer, 22, 45 Vehicle, 23, 44 Slit, 24 Notch, 25 Drain hole, 26 Cable Penetrating portion, 30 fences, 32 beam pipe, 33, 43 metal cap 34 end cap 35 connecting block, 40 cable-type road safety barriers, F impact force _{F H} horizontal impact force, the _{F V} vertical Impact force, La insertion length, Lb connection width.

Claims (1)

In a line-of-sight guide for a cable-type road protection fence comprising a column having a pair of slits opened at the upper end, and a cable extending across the slit at an interval in the vertical direction,
A reflector, a reflector holding portion that holds the reflector, a fitting portion that is fitted into the upper end portion of the support column, and a connecting portion that connects the reflector holding portion and the fitting portion;
Each of the reflector holding part, the fitting part, and the connecting part is a continuous body made of an elastic body .
Consolidated unit, Ri hollow cylindrical body Der connecting the portion inlaid and the reflector holding portion with a predetermined connecting width,
The fitting portion is a cylindrical body that has a predetermined fitting length and is fitted into the upper end portion of the support column, and has a through hole that passes through a binding band that is wound around a cable that is stretched around the support column to be inserted. A line-of-sight guide for a cable-type road protection fence, which is held by a cable-type road protection fence via a cable tie when a vehicle collides .

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