JP2010071034A - Guardrail for road - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guardrail for road capable of effectively absorbing a collision energy at the time of vehicle collision. <P>SOLUTION: A guardrail for road is provided with a plurality of posts 2 elected at every prescribed intervals along the road and a plurality of rigid shock absorbing materials 3 installed between each post 2, 2 by being connected with both ends edge to adjacent posts. Each shock absorbing material 3 is comprised of a cable material 31 which is connected with both ends edge to the adjacent posts 2, 2 and a rigid pipe material 32 which covers the cable material 31 in a longitudinal direction, and an end edge of vehicle rear side in a travelling direction in the cable material 31 is exposed on the pipe material 32. Thus, the end edge of vehicle rear side in the travelling direction in the shock absorbing materials 3 works properly as 'allowance' at the time of vehicle collision. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a road guard fence installed in a central part or a side part of an expressway or the like.

  2. Description of the Related Art In recent years, construction of a non-separated two-lane road composed of a driving lane and an opposite lane has been progressing mainly for the purpose of reducing costs and reducing the construction range on highways.

  In the case of such a non-separated two-lane road, if a vehicle traveling in the driving lane mishandles for some reason, it will protrude into the opposite lane at a high speed and collide with a vehicle traveling in the opposite lane. An accident occurs.

  Therefore, conventionally, measures such as providing a median strip at the center of a two-lane road, standing elongate post cones at predetermined intervals along the road, or providing simple protective fences have been taken. It was. However, with these measures, when the vehicle is traveling at a high speed, it is possible to get out of the oncoming lane by climbing the median strip, slashing the post cone, or easily breaking through the protective fence. It could not be prevented sufficiently.

  Further, as shown in FIG. 7, a guard cable is known in which struts (101) are erected at predetermined intervals along the center of the road, and metal cables (102) are installed between the struts (101). Various improved guard cables have been proposed (see Patent Documents 1 to 3). However, when the vehicle (T) collides as shown in FIG. 7 (b), the cable (102) is greatly bent, and as shown in FIG. 7 (c), the vehicle (T) directly collides with the support column. In some cases, the vehicle (T) spins due to an impact that hits the column.

  Of course, it is conceivable to install a large-sized rigid guard rail, but because the installation space is large, the lanes on both sides must be further expanded, resulting in high construction costs. The guardrail also provided a sense of pressure to the vehicle driver. In addition, since this guard rail has no so-called “play” part due to its rigidity, it tries to absorb the collision energy at the time of vehicle collision with the guard rail and the strut at a time, so the collision energy is not absorbed efficiently There was also.

JP 2001-173617 A JP-A-6-73715 Japanese Patent Laid-Open No. 11-148118

  Such a problem can occur in any road other than the highway, and can occur not only in the central portion of the road but also in the side portion of the road that prevents the vehicle from falling.

  The present invention has been made in view of the above-described technical background, and can efficiently absorb the collision energy at the time of a vehicle collision, and thus can reduce a vehicle accident on a highway or the like. The challenge is to provide protective fences.

  In order to solve the above-mentioned problem, the present invention comprises a plurality of support columns erected at predetermined intervals along a road and a plurality of shock absorbers installed between the columns. A rigid body provided in a state extending in the vehicle traveling direction is provided, and a rear end portion of the rigid body in the vehicle traveling direction is connected to a support via an elastic body. In the present invention, the term “elastic body” refers to not only a so-called elastic member but also a cable member that is stretched, such as a cable member that can be stretched with rotation when a predetermined force or more is applied.

  According to this, since the elastic body expands with rotation when the vehicle collides with the rigid body, the elastic body can function as “play” when the vehicle collides. For this reason, for example, each member absorbs the collision energy while sequentially interlocking with a time difference, such as a shock absorber, a rear column, and a front column, and efficiently absorbs the collision energy at the time of a vehicle collision. Can do.

  Moreover, it is provided with a plurality of struts erected at predetermined intervals along the road and a plurality of shock absorbers erected between the struts, each shock absorber being stretched between adjacent struts And a rigid body provided in a state extending in the vehicle traveling direction so as to cover the cable material, and the rear end of the cable material in the vehicle traveling direction is exposed from the rigid body. It is characterized by. In the present invention, “covering” includes not only covering the cable material over the entire circumference but also covering only the side surface on the lane side, for example.

  According to this, when the vehicle collides with the rigid body, the rear end of the cable material in the vehicle traveling direction expands with rotation, so that the end functions as “play” at the time of the vehicle collision. Can do. For this reason, for example, each member absorbs the collision energy while sequentially interlocking with a time difference, such as a shock absorber, a rear column, and a front column, and efficiently absorbs the collision energy at the time of a vehicle collision. Can do.

  Moreover, when the said rigid body is a pipe material which coat | covers a cable material over a perimeter in a vehicle advancing direction, it becomes easy to comprise integrally with a cable material.

  In addition, when the end of the rear side in the vehicle traveling direction is notched to the near side, the rear end of the cable member in the vehicle traveling direction rotates when the vehicle collides with the rigid body. Therefore, the function as “play” at the time of a vehicle collision by the end portion can be improved.

  Further, when the rigid body is formed in a flat shape so as to cover a plurality of cable members laid in parallel vertically, the vehicle and the rigid body come into surface contact when the vehicle collides with the rigid body. The collision energy at the time of the vehicle collision can be absorbed more efficiently.

  In addition, when the second cable material having a strength higher than that of the cable material is installed in a slack state between the support columns, even if the shock absorber is broken due to a severe vehicle collision, the second high-strength material is used. This cable material can prevent the vehicle from protruding into the oncoming lane.

  In addition, the shock absorbing material has an end on the front side in the vehicle traveling direction connected to the front side of the column, and an end on the rear side in the vehicle traveling direction connected to the opposite side of the column, It is preferable that it is constructed in a state of being gradually inclined along the front side. According to this, since the shock absorbing material is installed in a state of being gradually inclined toward the front side along the vehicle traveling direction, when the vehicle collides with the rigid body, the force to maintain the original traveling lane acts on the vehicle. Further, it is possible to further prevent a direct collision with the front support column in the vehicle traveling direction.

  In addition, a protective cover is provided to cover the connecting portion between the end of the shock absorbing material on the front side in the vehicle traveling direction and the support column from the side, and the protective cover is raised toward the front side along the vehicle traveling direction. It is preferable that it is formed. According to this, even when the vehicle collides with the vicinity of the strut on the front side in the traveling direction, the force that maintains the original lane by the protective cover works, and it can be further prevented from directly colliding with the front strut. In addition, it is possible to attach the reflecting plate or the like to the inclined portion protruding to the near side of the protective cover in a state where it is easy to visually recognize, thereby contributing to safe driving of the driver.

  According to the present invention, when the vehicle collides with the rigid body, the elastic body expands with rotation, so that the elastic body can function as “play” when the vehicle collides. For this reason, for example, each member absorbs the collision energy while sequentially interlocking with a time difference, such as a shock absorber, a rear column, and a front column, and efficiently absorbs the collision energy at the time of a vehicle collision. Can do.

  In addition, since the structure is simple, the manufacturing and installation costs can be reduced, the installation space can be saved, and vehicle accidents on highways and the like can be reduced.

  Next, a road guard fence according to an embodiment of the present invention will be described with reference to the drawings.

  In addition, this embodiment demonstrates the case where it applies to the protection fence (1) for small roads mainly installed in center parts, such as a highway. Therefore, the vehicle (T) travels on both the left and right sides of the road guard fence (1) as shown in FIG. Further, for convenience of explanation, the vehicle (T) traveling on the left side in FIG. 1 will be described as a reference, so that the front side of the vehicle (T) may be described as the left side and the opposite side as the right side.

  As shown in FIGS. 1 and 2, the road guard fence (1) includes a plurality of support columns (2) erected at predetermined intervals (for example, 2500 mm) along a central portion of an expressway, etc. A plurality of shock absorbers (3) provided between the columns (2) and (2).

  The column (2) is provided on a cylindrical column main body (21), a mounting plate (22) having a rectangular shape in plan view for standing the column main body (21), and an upper part of the column main body (21). And a connecting member (23) having a cross shape in plan view.

  The column main body (21) is erected vertically from the central portion of the mounting plate (22). The material of the column main body (21) is not particularly limited. When the vehicle (T) crashes, a shock absorbing steel pipe or the like is provided so that the collision energy can be absorbed in conjunction with the shock absorber (3) described later. used. Further, in order to save installation space and reduce the feeling of pressure on the driver of the vehicle (T), the diameter of the column main body (21) is set to about 150 mm and the height is about 460 mm.

  The mounting plate (22) is for standing the column main body (21) on the road, and the four corners are fixed with anchor bolts in a state of being placed at a predetermined position in the center of the road. ing. The column main body (21) and the mounting plate (22) are fixed by welding or the like, and a support member (24) is fixed so as to support the four directions of the column main body (21). The outer diameter is about 400 mm in length, about 300 mm in width, and about 16 mm in thickness, and can be installed on a two-lane road with a margin.

  The connecting member (23) is fixed so as to cover the upper portion of the column main body (21), and the vertical plate (21a) perpendicular to the traveling direction of the vehicle (T) and the traveling of the vehicle (T). It consists of a parallel plate (21b) parallel to the direction. Of these, the vertical plate (21a) is provided with connecting holes (23c) on both the left and right sides, and the end of the shock absorber (3) is inserted into each connecting hole (23c) as will be described later. It comes to be connected with. Moreover, about the parallel plate (21b), the one end part of the below-mentioned protective cover (4) is connected.

  In the present embodiment, the connecting member (23) is fixed to the column main body (21). However, even if it can rotate within a predetermined angle range in the horizontal direction with respect to the column main body (21). Good.

  The shock absorbing material (3) includes cable members (31) (31) laid in parallel on the top and bottom in a state where the struts (2) and (2) are stretched, and the cable members (31) (31). ) In the length direction.

   The cable member (31) is made of a metal stretchable wire rope, and is provided with metal thin tubular caulking members (31b) (31b) at both ends.

  This cable member (31) has the property of an elastic body by being laid in a stretched state between the struts (2) and (2), and particularly in the vehicle traveling direction when a predetermined force or more is applied. It will be in the state which can extend | expand the edge part of the back side of this with rotation.

  Further, the cable member (31) has a caulking member (31b) on the front side in the vehicle traveling direction, the front side of the vertical plate (21a) of the connecting member (23) of the support column (2) (the lower diagonal line in FIG. 1). It is connected to the left side of the vehicle traveling direction). Further, the caulking member (31b) on the rear side in the vehicle traveling direction is coupled to the opposite side of the vertical plate (21a) of the coupling member (23) of the support column (2) (the right side in the vehicle traveling direction of the lower oblique line in FIG. 1). Has been. The caulking member (31b) of the cable member (31) is fastened and fixed by a bolt (25) while being inserted into the connecting hole (23c) of the vertical plate (23a).

  Thereby, the shock absorbing material (3) is installed in a state of being gradually inclined toward the near side along the vehicle traveling direction. For this reason, when the vehicle (T) collides with the shock absorber (3), the force to maintain the original travel lane acts on the vehicle (T) and directly collides with the support (2) on the front side in the vehicle traveling direction. This can be further prevented.

  The caulking member (31b) is generally formed from mild steel and is supported at one point on the vertical plate (23a). For this reason, when the vehicle (T) collides with the impact absorbing material (3), an impact force acts on the cable member (31) of the impact absorbing material (3) on the opposite side. At this time, the caulking member (31b) located at the rear end portion in the vehicle traveling direction of the impact-absorbing material (3) that has collided expands while rotating on the opposite side with the support location of the vertical plate (23a) as an axis. can do.

  In the present embodiment, the vehicle (T) travels on both the left and right sides of the road protection fence, but the shock absorber (3) is in a state of being inclined symmetrically on both the left and right sides, so that the vehicle travels on the opposite lane. The same function is performed for (T).

  The said pipe material (32) is provided in the state which coat | covers a cable material (31) (31) over a perimeter in a vehicle advancing direction. The pipe material (32) is made of a rigid material, but a material that can be appropriately deformed by the collision of the vehicle (T) to absorb the collision energy is used. If a soft material that deforms greatly is used, it may bend greatly like a normal guard cable and directly collide with the support column (2). Therefore, the material (for example, iron, stainless steel, etc.) should be avoided. ) Must be selected.

  Moreover, this pipe member is formed shorter than the length of a cable material (31). For this reason, both ends of the cable material (31) are exposed from the pipe material (32), and the heads of the caulking members (31b) of the cable material (31) are inserted into the opening portions of both ends of the pipe material (32). It is in the state.

  By adopting such a structure, when the vehicle (T) collides with the shock absorbing material (3), the end of the cable material (31) on the rear side in the vehicle traveling direction expands with rotation. The end can function as “play” in the event of a vehicle collision.

  In particular, in the present embodiment, the pipe member (32) has a rear end opening (32a) in the vehicle traveling direction cut away to the front side. For this reason, when the vehicle (T) collides, the end of the cable material (31) on the rear side in the vehicle traveling direction easily expands with rotation. Can improve the function.

  The rate at which the cable material (31) should be exposed from the pipe material (32) is appropriately set according to the type and cost of the road to be installed. However, if the length of the shock absorbing material (3) is too short compared to the cable material (31), it will be greatly bent like a guard cable, and conversely, it is almost the same length as the cable material (31). Since the collision energy is absorbed by each member in the same manner as the normal guard rail, it is preferable to expose within a predetermined range.

  In the present embodiment, not only the rear side in the vehicle traveling direction but also the front end of the cable member (31) is exposed, and the shock absorbing member (3) has the front end in the vehicle traveling direction. It is connected to the column (2) so that it can be extended while rotating. This functions as “play” mainly when the vehicle (T) traveling on the upper oblique line in FIG. 1 collides rather than for the vehicle (T) traveling on the lower oblique line in FIG. It has a symmetric structure for traveling the vehicle (T) on the left and right sides of the protective fence (1).

  The pipe member (32) is formed in a flat shape so as to cover the upper and lower two cable members (31) and (31) together. Thus, when the vehicle (T) collides, the vehicle (T) and the shock absorber (3) come into surface contact, and the collision energy at the time of the vehicle collision can be absorbed more efficiently.

  Further, (4) is a protective cover. The protective cover (4) is connected to the front end of the shock absorbing member (3) in the vehicle traveling direction (in this embodiment, the front end of the cable member (31)) and the end. The support column (2) is provided so as to cover from the side. Moreover, this protective cover (4) is formed in the state which protruded to the near side along the vehicle advancing direction, and the edge part of the front side is a parallel plate (21b) of the connection member (23) of a support | pillar (2). And an end portion on the rear side is connected to the pipe material (32) of the shock absorbing material (3).

  Thus, even if the vehicle (T) collides with the vicinity of the forward strut (2) in the traveling direction, the protective cover (4) exerts a force to maintain the original lane, and the front strut (2) is directly applied. The collision can be further prevented.

  Moreover, since the protective cover (4) is in a state of being raised toward the near side along the vehicle traveling direction, the reflector can be attached to the raised inclined surface in a state where it can be easily seen, so that the driver can drive safely. It becomes possible to contribute to.

  Furthermore, in this embodiment, the end of the protective cover (4) is connected to the pipe material (32) of the shock absorbing material (3), so that the pipe material (32) is independent of the cable material (31) and the column ( 2) It can be provided horizontally between (2).

  In the present embodiment, the protective cover (4) is provided symmetrically not only on the front side in the vehicle traveling direction of the cable member (31) but also on the rear side, but the protective cover (4) on the rear side is mainly provided. This is for when the vehicle (T) traveling in the upper opposite lane in FIG. 1 collides. When the vehicle (T) traveling in the lower lane of FIG. 1 collides, the protective cover (4) on the opposite side may have a considerable influence, but the structure of the protective cover (4) absorbs shock. The end of the material (3) on the rear side in the vehicle traveling direction does not hinder the function as “play”, but rather can complement the function as “play” of the shock absorber (3).

  Next, the operation | movement at the time of the vehicle collision of the guard fence for this road is demonstrated, referring FIG. In the present embodiment, the case where the vehicle (T) collides with the vicinity of the center of the shock absorber (3) will be described.

  When the vehicle (T) collides with the center of the shock absorber (3), as shown in FIG. 5 (b), the rear end of the cable member (31) in the vehicle traveling direction is on the opposite side of the lane. It stretches with rotation and absorbs collision energy by functioning as “play” in the event of a vehicle collision. The pipe material (32) of the shock absorbing material (3) absorbs the impact energy together with the cable material (31), and the cable material (31) is greatly bent and deformed by the material of the rigid body. To prevent.

  Then, after the “play” at the time of the vehicle collision of the shock absorbing material (3) functions, as shown in FIG. 5 (c), the rear side is pulled by the shock absorbing material (3) that has collided. The struts (2) absorb the collision energy by flattening or breaking.

  Then, after the rear strut (2) absorbs the collision energy, as shown in FIG. 5D, the front strut (2) of the impact absorbing material (3) that has collided is collided by flattening or breaking. Absorbs.

  In FIGS. 5C and 5D, the column (2) is expressed in a state shifted from the dotted line to the solid line. This represents that the column (2) is broken or flattened.

  Thus, when the speed of the vehicle (T) at the time of the collision is low, the collision energy can be almost absorbed. When the speed at the time of collision of the vehicle (T) is high, the vehicle (T) travels as it is rubbing to the next shock absorber (3), absorbs the impact energy by the same mechanism, and the vehicle (T ) Repeat until the speed becomes zero.

  As described above, when the vehicle (T) collides with the shock absorbing material (3), the end of the cable material (31) on the rear side in the vehicle traveling direction expands with rotation. It can function as a “play”. For this reason, for example, each member absorbs the collision energy sequentially in time difference, such as the shock absorber (3), the rear column (2), and the front column (2), and the collision energy at the time of the vehicle collision is absorbed. It can be absorbed efficiently.

  In addition, since the structure is simple, the manufacturing and installation costs can be reduced, the installation space can be saved, and vehicle accidents on highways and the like can be reduced.

  In addition, although this embodiment demonstrated the case where the vehicle (T) collided with the center part of the shock absorber (3), when it collided with the front part or rear part of the vehicle advancing direction in a shock absorber (3). Also, each member of the shock absorber (3), the front strut (2), and the rear strut (2) can absorb the collision energy while sequentially interlocking with a time difference. That is, the order in which the members absorb the collision energy differs depending on the speed, type, collision angle, collision location, etc. of the vehicle (T), but in any case, the vehicle using the cable material (31). The “play” function at the time of collision enables each member to absorb the collision energy while sequentially interlocking with a time difference.

  Moreover, although the case where it applied to the protective fence (1) for small roads installed in the center part of an expressway etc. was demonstrated, you may apply to what is installed in the side part of a road, or a large sized thing . In addition, when installing in the side part of a road, since an opposing lane does not exist, it is not necessarily required to comprise symmetrically like this embodiment.

  Moreover, although the “play” function of the shock absorbing material (3) is realized by the combined structure of the cable material (31) and the pipe material (32), the present invention is not limited to this. For example, a structure in which a rigid plate material is fixed to the cable material (31) in a state of extending in the vehicle traveling direction so as to cover only the lane side of the cable material (31). Or the structure etc. which connect a rigid board | plate material directly to a support | pillar (2) by a cable material or another elastic body may be sufficient. In short, the shock absorber includes a rigid body (in the above embodiment, the pipe material (32)) provided in a state extending in the vehicle traveling direction, and an end of the rigid body on the rear side in the vehicle traveling direction is an elastic body ( In the said embodiment, what is necessary is just to be connected with the support | pillar (2) via the cable material (31).

  The cable member (31) was installed with both ends connected to the support posts (2) and (2), but was inserted into the support posts (2) and (2) and the accessories of the support posts (2) and (2). You may erection in the state.

  Moreover, as shown in FIG. 6, you may provide a 2nd cable material (33) separately from the cable material (31) of the above-mentioned impact-absorbing material (3). The second cable member (33) has higher strength than the cable member (31) of the shock absorbing member (3) and is laid between the support columns (2) and (2) in a slack state.

  As a result, in the case of a normal collision of the vehicle (T), the second cable member (33) is installed in a slack state, so that it does not function. Absorbs. On the other hand, in the case of a severe collision of the vehicle (T), even if the shock absorber (3) breaks, the high-strength second cable member (33) prevents the vehicle (T) from protruding into the oncoming lane. it can.

  In addition, when the pipe material (32) is provided, it is preferable that the second cable material (33) is collectively covered with the pipe material (32) like the other cable materials (31).

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described size, shape, material, and the like, and various design changes can be made.

It is a top view of the guard fence for roads concerning one embodiment of the present invention. It is a side view of the guard fence for roads. It is an enlarged view of the connection part of an impact-absorbing material and a support | pillar. It is a longitudinal cross-sectional view of the center part of an impact-absorbing material. It is a transition diagram which shows the operation | movement at the time of the collision of the road guard fence. It is a side view of the guard fence for roads concerning other embodiments. It is a transition diagram which shows the operation | movement at the time of the collision of the conventional guard cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Road guard fence 2 ... Column 21 ... Column body 22 ... Mounting plate 23 ... Connection member 23a ... Vertical plate 23b ... Parallel plate 23c ... Connection hole 24 ... Bearing member 25 ... Bolt 3 ... Shock absorber 31 ... Cable Material 31a ... Caulking member 32 ... Pipe material 32a ... End opening 4 ... Protective cover T ... Vehicle

Claims (8)

It consists of a plurality of struts erected at predetermined intervals along the road, and a plurality of shock absorbers erected between each strut,
Each shock absorber includes a rigid body provided in a state of extending in the vehicle traveling direction, and an end of the rigid body on the rear side in the vehicle traveling direction is connected to a support via an elastic body. Protective fence for road. A plurality of struts erected at predetermined intervals along the road, and a plurality of shock absorbers erected between each strut,
Each impact absorbing material is composed of a cable material installed in a stretched state between adjacent struts, and a rigid body provided in a state extending in the vehicle traveling direction so as to cover the cable material. A road guard fence characterized in that an end on the rear side in the vehicle traveling direction is exposed from a rigid body.   The road fence according to claim 2, wherein the rigid body is a pipe material that covers the cable material over the entire circumference in the vehicle traveling direction.   4. The road guard fence according to claim 2, wherein the rigid body has a rear end cut away in a vehicle traveling direction.   The road fence according to any one of claims 2 to 4, wherein the rigid body is formed in a flat shape so as to cover a plurality of cable members laid in parallel vertically.   The road protection fence according to any one of claims 2 to 5, wherein a second cable member having a strength higher than that of the cable member of the shock absorbing member is installed in a slack state between the columns.   The shock absorber has an end on the front side in the vehicle traveling direction connected to the front side of the column, and an end on the rear side in the vehicle traveling direction connected to the opposite side of the column, along the vehicle traveling direction. The road fence according to any one of claims 1 to 6, wherein the road fence is constructed in a state of being gradually inclined toward the front side.   A protective cover is provided to cover the connecting portion between the front end of the shock absorbing material in the vehicle traveling direction and the support column from the side, and the protective cover is formed in a shape protruding to the near side along the vehicle traveling direction. The guard fence for roads in any one of Claims 1-7 currently made.