JP6605937B2 - Guard fence for road - Google Patents

Description

  The present invention relates to a road guard fence in consideration of a landscape installed along a road.

  Conventionally, in consideration of the safety of drivers and pedestrians, road protection fences have been installed along the road (see Patent Document 1).

  When landscape characteristics are taken into consideration when designing such road fences, the psychological effects on pedestrians are mainly considered.

JP 2003-176513 A

  However, conventional road guards have been designed with consideration of only psychological effects such as aesthetics for pedestrians and not for drivers. Therefore, it is preferable to design a road protection fence in consideration of psychological influence on the driver.

  As a psychological influence on the driver, it is more preferable if driving safety and comfort can be provided particularly from a psychological aspect.

  Therefore, the present invention has been devised in view of the above-described problems, and is a road protection fence that ensures the safety of drivers and pedestrians, and has a psychological effect on the driver. The purpose is to provide a protective fence for road.

A road guard fence according to a first aspect of the present invention is a road guard fence comprising a plurality of pillars erected on the ground and beams attached between the pillars, wherein the pillar is a large-diameter portion. And a small-diameter portion that is smaller than the large-diameter portion and continuously provided on the large-diameter portion, and at least one of the large-diameter portion and the small-diameter portion is provided. A peripheral portion in a cross section parallel to the direction has a shape constituted by a plurality of straight lines, and the beam has a cylindrical shape extending linearly.

The road fence according to a second aspect of the present invention is characterized in that, in the first aspect , the support column has a shape that repeats a large diameter portion, a small diameter portion, and a large diameter portion in order from the upper end.

The road fence according to a third aspect of the present invention is characterized in that, in the first aspect , the support column has a shape that is repeated in order from the upper end, a small diameter portion, a large diameter portion, and a small diameter portion.

Road safety barriers according to the fourth invention, in any one of the first to third invention, the beam is characterized in that mounted three vertically between the posts.

  According to the present invention having the above-described configuration, it is possible to have a psychological influence not only on pedestrians but also on drivers, and as a result, the safety and comfort of driving can be improved from the psychological aspect of drivers. Can be provided.

It is a perspective view which shows the guard fence for road fences which concerns on 1st Embodiment. It is a front view of the guard fence for road fences of FIG. It is side surface sectional drawing of the guard fence for roads of FIG. (A) is side sectional drawing of an upper bracket, (B) is side sectional drawing of a lower bracket. It is a perspective view which shows the guard fence for roads which concerns on the modification of 1st Embodiment. It is a perspective view which shows the guard fence for roads concerning 2nd Embodiment. It is a front view of the guard fence for roads of FIG. It is side surface sectional drawing of the guard fence for roads of FIG. (A) is a side sectional view of the upper bracket, (B) is a side sectional view of the middle bracket, and (C) is a side sectional view of the lower bracket. (A)-(K) are all front views which show the support | pillar used for the various modifications of the guard fence for roads concerning 2nd Embodiment. It is a perspective view which shows the conventional guard fence for roads. It is a graph which shows the result of the short time presentation in a marble building image, (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety. It is a graph which shows the result of the short time presentation in a green-landscape image, (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety. It is a graph which shows the result of the free observation in a marble building image, (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety. It is a graph which shows the result of the free observation in a green-landscape image, (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety.

  Hereinafter, a road guard fence according to an embodiment of the present invention will be described.

<First Embodiment>
FIG. 1 is a perspective view showing a road fence protective fence 1 according to the first embodiment. FIG. 2 is a front view of the road fence protective fence 1 of FIG. 1. FIG. 3 is a side sectional view of the road guard fence 1 of FIG.

  The road guard fence 1 includes a plurality of support columns 2 standing on the ground and two beams 3 (3a, 3b) attached to the support columns 2.

  The support | pillar 2 is a steel pillar-like object standing on the ground using the concrete foundation etc. which are not shown in figure. In this embodiment, the support column 2 has a substantially quadrangular prism shape and the surface 21a on the side where the beam 3 is attached is inclined at an acute angle with respect to the ground. Not limited to this, other modes can be adopted.

  An upper bracket 23 a and a lower bracket 23 b for attaching the beam 3 are attached to the surface 21 a side of the column 2. 4A is a side sectional view of the upper bracket 23a, and FIG. 4B is a side sectional view of the lower bracket 23b.

  The upper bracket 23a is a steel plate-like member that is attached in the vicinity of the upper end of the support column 2 and is curved in a substantially U shape.

  The lower bracket 23b is a steel plate-like member that is attached to the column 2 below the upper bracket 23a and is curved in a substantially U shape.

  Attachment of the upper bracket 23a and the lower bracket 23b to the column 2 can be performed using any method such as bolt fastening or welding.

  The beam 3 is a member made of a steel pipe curved in a wave shape in a single plane. The beam 3 is attached to the road guard fence 1 in a state where this curve is directed in the horizontal direction. In the present embodiment, two beams 3a and 3b are attached to the upper and lower sides of the support column 2 through fastening with bolts 24 to the upper bracket 23a and the lower bracket 23b, respectively.

  In the present embodiment, the beams 3a and 3b are provided so as to be parallel when viewed from the vertical direction. In the present invention, the present invention is not limited to this, and the beams 3a and 3b may be provided so as to overlap when viewed from the vertical method. Furthermore, as shown in FIG. 5, the beams 3a and 3b may be provided non-parallel when viewed from the vertical direction. FIG. 5 is a perspective view showing a road guard fence 1 ′ according to a modification of the first embodiment.

Second Embodiment
FIG. 6 is a perspective view showing a road guard fence 10 according to the second embodiment. FIG. 7 is a front view of the road guard fence 10 of FIG. 8 is a side cross-sectional view 10 of the road guard fence of FIG.

  The road guard fence 10 according to the present embodiment is configured to include a plurality of support columns 2 ′ standing on the ground and a beam 3 attached between the support columns 2 ′.

  The strut 2 ′ has a large-diameter portion 210 at the upper and lower ends, and a small-diameter portion 220 having a smaller strut diameter than the large-diameter portion 210 is continuous between the upper and lower large-diameter portions 210. It is a steel columnar object having a formed drum shape.

  The beam 3 is a member made of a cylindrical steel pipe extending linearly. In the present embodiment, three beams 3a, 3b, 3c are attached to the column 2 '.

  The beam 3 is attached to the support 2 'using an upper bracket, a middle bracket, and a lower bracket, which are the same brackets as in the first embodiment.

  The upper bracket, the middle bracket, and the lower bracket are attached to the column 3 using an arbitrary method such as bolt fastening or welding.

  The beams 3a, 3b, and 3c are attached to the column 2 'via an upper bracket, a middle bracket, and a lower bracket, respectively. The beams 3a, 3b, and 3c are fixed to the upper bracket, the middle bracket, and the lower bracket by using bolt fastening.

  The struts 2 'can also have a variety of different shapes.

  (A)-(K) of FIG. 10 is a front view which shows the support | pillar 2 'used for the various modifications of the road guard fence 10 which concerns on 2nd Embodiment.

  In each modified example, as shown in FIG. 10, the column 2 ′ has a shape in which a large diameter portion and a small diameter portion are alternately arranged in various modes.

  The columns 271, 272, 273, 274 shown in the modified examples (A) to (D) are repeated as the large diameter portion 210, the small diameter portion 220, the large diameter portion 210... From the upper end side of the column 2 ′ of the second embodiment. Each number has changed.

  The struts 275, 276, 277, 278, and 279 shown in the modified examples (E) to (I) are different from the strut 2 ′ of the second embodiment in that the small diameter portion 220, the large diameter portion 210, and the small diameter portion 220 from the upper end side. Each of these repeated numbers has changed.

  Moreover, the support | pillar 280 shown to a modification (J) is the structure repeated with the small diameter part 220, the large diameter part 210, the small diameter part 220, and the large diameter part 210 from the upper end side, Comprising: The 2nd small diameter part 220 from an upper end side. The taper from the small diameter portion 220 to the large diameter portion 210 is gentler than the taper from the first small diameter portion 220 to the large diameter portion 210.

  Further, the support column 281 shown in the modified example (K) is configured such that the large diameter portion 210, the small diameter portion 220, the large diameter portion 210, the small diameter portion 220, and the large diameter portion 210 are repeated from the upper end side. The small diameter portion 220 has a cylindrical shape extending in the vertical direction. Further, the taper from the last small diameter portion 220 to the large diameter portion 210 is gentler than the taper from the other small diameter portion 220 to the large diameter portion 210.

<Effects of the present invention>
Next, the effects of the road fences 1 and 10 according to the first and second embodiments described above will be described.

  The road protection fence according to the first embodiment has a psychological effect such as drowsiness prevention and speed control by giving the driver a sense of incongruity, and has an effect of improving traffic safety.

  Moreover, the road guard fence according to the second embodiment has a psychological effect of improving the scenery by giving the driver a feeling of comfort and safety.

  These effects will be discussed in detail below in comparison with conventional road fences.

  FIG. 11 is a perspective view showing a conventional road protection fence 100. A conventional road protection fence 100 includes a plurality of support columns 200 that are columnar members whose distal end portions are bent in a substantially L shape, and a beam 300 that is a cylindrical steel pipe attached between the support columns 200. Verification was carried out using a protective fence as an example.

  The support column 200 is erected on the ground using a concrete foundation (not shown).

  The beam 300 is attached to the column 200 using any means such as bolt fastening or welding. In the conventional example shown in FIG. 11, two beams 300a and 300b are attached vertically. The upper beam 300 a is attached to the upper end portion of the support column 200 bent in an L shape, and the lower beam 300 b is attached to the lower side of the bent portion of the support column 200.

  Therefore, the beam 300a and the beam 300b are attached so as not to overlap each other when viewed from the vertical direction.

  Results of experiments conducted on differences in psychological effects on drivers and pedestrians of the conventional road protection fence 100, the road protection fence 1 according to the first embodiment, and the road protection fence 10 according to the second embodiment are shown. Validate.

  The psychological effects of each aspect were examined using impression evaluation by the normalized rank method. Normalized rank method is a method that ranks multiple comparison targets at the same time by comparing each other at the same time, converts the rank scales obtained by ranking into distance scales, arranges them on the same scale, and evaluates the relationship between the targets. It is a technique to do.

  First, the results of examining the psychological impact on the driver will be described.

  FIG. 12 is a graph showing the results of short-time presentation in a marble building image, where (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety.

  FIG. 13 is a graph showing the results of short-time presentation in a green landscape image, where (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety.

  The marble building image means that each road fence 1, 10, 100 is installed along a road laid adjacent to a marble-like building, and the road fence 1, 10, 100 from the road side. The situation of viewing 100 is shown.

  The green landscape image indicates a situation in which the road protection fences 1, 10, 100 are installed along the roads laid in the green space, and the road protection fences 1, 10, 100 are viewed from the road side. .

  The short-time presentation means that the images of the road fences 1, 10, and 100 are randomly switched every second and presented to the subject 24 times in total in each of the marble building image and the green landscape image.

  By presenting for a short time, it is possible to examine the psychological influence on the driver who moves faster than a pedestrian and can see the landscape and the protective fence only for a short time.

  12 and 13, A shows the verification result of the road guard fence 1 according to the first embodiment, B shows the verification result of the road guard fence according to the second embodiment, and C shows the conventional road protection fence. The verification result of the protective fence 100 is shown.

  The verification was performed by examining how much each of the evaluation items of “discomfort”, “comfort”, and “safety” felt.

  Table 1 summarizes the experimental results shown in FIGS.

  Table 1 lists the items that received the highest evaluation for each evaluation item, that is, the items that felt most strongly for each evaluation item. The results in Table 1 represent the results of a short time presentation, that is, the psychological impact on the driver.

  From FIG. 12 and Table 1, when the road guard fence 1 according to the first embodiment is installed along a road laid adjacent to a building whose wall surface is marble-like, for comfort and safety, It can be seen that while the degree of feeling is lower than that of the conventional road protection fence 100, a sense of discomfort is strongly felt.

  Further, from FIG. 13 and Table 1, when the road protection fence 1 is installed along the road laid in the green space, the degree to which the subject feels the comfort and safety is the conventional road protection fence 100. On the other hand, it can be seen that there is a strong sense of incongruity.

  From these results, it can be seen that the road guard fence 1 according to the first embodiment gives the driver a sense of incongruity. And by giving a sense of incongruity, it is possible to prevent drowsiness from occurring during driving and to suppress an increase in driving speed.

  On the other hand, from FIG. 12 and Table 1, when the road protection fence 10 according to the second embodiment is installed along a road laid adjacent to a building having a marble wall surface, The degree to which the subject felt these was higher than that of the conventional road protection fence 100.

  Moreover, from FIG. 13 and Table 1, when the protective fence 10 for roads concerning 2nd Embodiment is installed along the road laid in the green space, the extent to which a subject feels these about a feeling of comfort and safety is conventional. The result was higher than that of the road fence 100.

  From these results, it can be seen that the road guard fence 10 according to the second embodiment can give a good impression to the driver and improve the scenery for the driver.

  Next, the result verified about the psychological influence with respect to a pedestrian is demonstrated.

  FIG. 14 is a graph showing the results of free observation in a marble building image, where (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety.

  FIG. 15 is a graph showing the result of free observation in a green landscape image, where (A) shows the degree of discomfort, (B) shows the degree of comfort, and (C) shows the degree of safety.

  Free observation means that each image can be observed freely without providing a time limit.

  By this free observation, it is possible to examine the psychological influence on a pedestrian who travels slower than a driver who travels in a car and takes a long time to view the landscape.

  14 and 15, A shows the verification result of the road guard fence 1 according to the first embodiment, B shows the verification result of the road guard fence 10 according to the second embodiment, and C shows the conventional result. The verification result of the road guard fence 100 is shown.

  The verification was performed by examining how much each of the evaluation items of “discomfort”, “comfort” and “safety” felt.

  Table 2 summarizes the experimental results shown in FIGS. 14 and 15.

  Table 2 lists the items that received the highest evaluation for each evaluation item, that is, the items that felt most strongly for each evaluation item. The results in Table 2 represent the results of free observation, that is, the psychological influence on the pedestrian.

  As shown in FIG. 14 and Table 2, when the road fence 1 according to the first embodiment is installed along a road laid adjacent to a building whose wall surface is marble-like, in a free observation, comfort and safety are felt. It can be seen that while the degree of feeling is lower than that of the conventional road protection fence 100, a sense of discomfort is strongly felt.

  Moreover, from FIG. 15 and Table 2, when the road fence 1 according to the first embodiment is installed along the road laid in the green space, in the free observation, the degree to which the subject feels about the safety feeling. It can be seen that it is lower than the conventional road protection fence 100, and on the other hand, gives a sense of incongruity comparable to that of the conventional road protection fence 100.

  From these results, it can be seen that the road guard fence 1 according to the first embodiment gives a sense of discomfort to pedestrians.

  On the other hand, from FIG. 14 and Table 2, when the road protection fence 10 according to the second embodiment is installed along a road laid adjacent to a building whose wall surface is marble-like, in the free observation, the conventional road Compared with the protective fence 100, the result was a strange feeling.

  Also, from FIG. 15 and Table 2, when the road guard fence 10 according to the second embodiment is installed along the road laid in the green space, the subject feels these feelings of comfort and safety in free observation. The result was higher than the conventional road guard 100

  From these results, the road fence 10 according to the second embodiment was laid in a green space, although it gives a strange feeling to pedestrians when installed adjacent to a marble-like building. When installed along the road, it can be seen that a comfortable feeling and a good impression can be given to pedestrians.

  As described above, according to the road guard fence according to the present invention, it can have a psychological effect not only on the pedestrian but also on the driver, and as a result, the safety of driving from the psychological aspect to the driver. And can provide comfort.

1, 1 ', 10, 100 Road guard fence 2, 2', 200, 271-281 Post 3, 3a, 3b, 3c Beam 21 Post main body 23a Upper bracket 23b Lower bracket 23c Middle bracket 24 Bolt 210 Large diameter portion 220 Small diameter part

Claims (4)

A road guard fence comprising a plurality of pillars standing on the ground and a beam attached between the pillars,
The strut includes a large diameter portion and a small diameter portion continuously provided on the large diameter portion, the strut diameter being smaller than the large diameter portion,
At least one of the large diameter part and the small diameter part is provided in plural,
The support column has a shape in which a peripheral portion in a cross section parallel to the axial direction is configured by a plurality of straight lines,
The road fence having a cylindrical shape extending in a straight line. The strut large diameter portion from the top in order, the small diameter portion, road safety barriers according to claim 1, characterized in that it has a shape that is repeated a large diameter portion. The strut small-diameter portion in this order from the top, the large diameter portion, road safety barriers according to claim 1, characterized in that it has a shape that is repeated with the small diameter portion. The beam is any one road safety barriers according to claims 1 to 3, characterized in that mounted three vertically between the posts.

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