JP2000170130A - Protection fence end cushioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equalize the absorption of energy due to deformation of an energy absorption member in a protection fence end cushioning device used for the protection fence end of the branch part or the like of an express-highway. SOLUTION: Two rows of guide members 2 are fixed on the end of a road protection fence 1 at an interval. Two rows of sliding beams 3 are slidably connected along the two rows of the guide members 2, and a sleeve beam 4 is fixed on the edge of the sliding beam 3. Interval materials 5, 6 are arranged and fixed between the two rows of the guide members 2 and the two rows of the sliding beams 3 at a prescribed interval, and a sliding support 8 is erected on the interval material 6 provided between the sliding beams 3. A plurality of cylindrical energy absorption members 9 are arranged on a cavity surrounded by the sliding beam 3 and the interval material 6 along the sliding direction of the sliding beam 3 in series, and the plurality of the cylindrical energy absorption member 9 and the interval material 6 are provided to be penetrated in a guide rod 10 slidable along the sliding direction of the sliding beam 3. A guide rail 12 is preferably provided on the ground of the movable range of the sliding support 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence end buffering device used at the end of a protective fence such as a branch of a highway.

[0002]

2. Description of the Related Art At the tip of a protective fence installed at a junction of a highway, a median strip, a safety zone, or the like, a vehicle that has been erroneously driven may collide. And protection of the vehicle.

[0003] The shock absorber is required to have a function of absorbing collision energy at the time of a vehicle collision, and various structures have been put to practical use. For example, JP-A-7-3729 discloses that
There is shown an example in which a number of hollow rod-shaped buffer cones made of synthetic resin are installed with their axial directions aligned with the collision direction. Japanese Patent Publication No. 54-18493 discloses a vinyl cylinder filled with water. Are arranged at the end of the protective fence in the axial direction up and down, and are surrounded by a partition wall.

[0004]

These all absorb the collision energy by deforming the shock absorber itself, but those which are filled with water must be handled in cold regions because measures against freezing are necessary. However, the one that utilizes the deformation of the cylinder cannot calculate the energy absorption because the deformation is uneven and the energy absorption is not uniform.
There were problems such as the need to take a large degree of safety.

Accordingly, an object of the present invention is to provide a protective fence end shock absorber capable of equalizing energy absorption due to deformation of an energy absorbing member.

[0006]

Means for Solving the Problems The protective fence end buffer device of the present invention is as follows (1) to (8).

(1) Two rows of guide members are fixedly provided at an end of the road protection fence with an interval, and two rows of sliding beams are slidably connected along the two rows of guide members. A sleeve beam is fixedly mounted at the tip of the sliding beam, a spacing member is fixedly arranged at a predetermined interval between the two rows of guide members and the two rows of sliding beams, and a spacing member provided between the sliding beams. A plurality of cylindrical energy absorbing members are arranged in series in the space surrounded by the sliding beam and the spacer along the sliding direction of the sliding beam. A guide rod slidable along the sliding direction of (1) is provided through the plurality of cylindrical energy absorbing members and the spacing member.

(2) A guide rail is provided on the ground within the movable range of the sliding support, and the lower end of the sliding support is slidably held, and the end of the protective fence is buffered according to the above (1). apparatus.

(3) Each of the two rows of sliding beams comprises two or more sliding beams arranged in series, wherein the end of the protective fence according to (1) or (2) is characterized in that: apparatus.

(4) The sliding beam is provided with claw members which are fixed to the guide member or upper and lower ends of the sliding beam adjacent to the rear and are slidable. )
The protective fence end buffer device according to any one of (1) to (3).

(5) The protective fence end buffer device according to any one of (1) to (4), wherein the cylindrical energy absorbing members are arranged in a plurality of rows.

(6) A cylindrical energy absorbing member is also arranged in a space in the sleeve beam.
The protective fence end buffer device according to any one of (1) to (5).

(7) The protective fence end buffer device according to any one of (1) to (6), wherein a difference is provided in the crushing characteristics according to the position of the cylindrical energy absorbing member.

(8) The protective fence end buffer device according to any one of (1) to (7), wherein the vertical dimension of the spacer is not less than the length of the cylindrical energy absorbing member. .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, referring to the illustrated example,
The protection fence end buffer device of the present invention will be described in detail.

FIG. 1 is a plan view (FIG. 1 (a)) and a side view (FIG. 1 (b)) showing an example of a protective fence end buffer according to the present invention, and FIG. 2 shows a guide member fixed thereto. , A sliding beam and the like are not yet connected to each other in a plan view (FIG. (A)) and a side view (FIG. (B)).

The protective fence end buffer according to the present invention is installed at the end of the road protective fence 1. Although the illustration shows an example in which a guardrail is used as the road protective fence 1,
There is no particular limitation, and the present invention is widely applied to, for example, guard ropes, concrete protective fences, walls, blocks, and the like which are usually used as road protective fences.

The guide members 2 are fixed to the ground by fixed columns 7 so that they do not move even if a vehicle collides. In this example, the guide member 2 has the same cross-sectional shape and rigidity as the guardrail used for the road protection fence 1. A spacing member 5 is arranged and fixed between the two rows of guide members 2 to maintain the spacing between the two rows of guide members 2. The guide member 2 serves as a guide for a sliding beam 3 to be described later to slide backward at the time of a collision of the vehicle. It is also a thing.

The two rows of sliding beams 3 are slidably connected along the two rows of guide members 2, and a sleeve beam 4 is fixedly mounted at the tip of the sliding beam 3. Spacing members 6 are arranged and fixed at predetermined intervals between the two rows of sliding beams 3, and sliding posts 8 are erected on the spacing members 6. In the example of FIG. 2, the sliding support 8 is merely placed on the ground, and can slide on the ground when a vehicle collides.

In a space surrounded by the sliding beam 3 and the spacer 6, a plurality of cylindrical energy absorbing members 9 are arranged in series along the sliding direction of the sliding beam 3. A guide rod 10 slidable along the sliding direction of the sliding beam 3 is provided through the cylindrical energy absorbing member 9 and the spacers 5 and 6.

FIG. 3 is a plan view illustrating the function of the guide rod 10 by omitting the cylindrical energy absorbing member 9 and the like from the example of the protective fence end buffer device of the present invention shown in FIG. is there. The guide rod 10 can slide along the sliding direction of the sliding beam 3. That is, if the vehicle is a sleeve beam 4
The sliding beam 3 slides along the two rows of guide members 2 when a force toward the guide member 2 is applied by colliding with
At this time, the guide rod 10 slides while being inserted into the guide rod receiving members 11 installed in the two rows of guide members 2. This helps the sliding beam 3 to slide along the guide member 2.

FIGS. 4 and 5 show a cylindrical energy absorbing member 9.
The details of the arrangement situation of the above are shown. That is, as shown in a plan view in FIG. 4 (a) and a side cross section in FIG. 4 (b), the cylindrical energy absorbing member 9 is provided in the space surrounded by the sliding beam 3 and the spacing member 6. Are arranged in series along the sliding direction of. The cylindrical energy absorbing members 9 are connected to each other by bolts and nuts, and the adjacent cylindrical energy absorbing members 9 are connected to the spacers 6 by bolts and nuts. In addition, as shown in FIG. 5 showing a cross section taken along the line AA in FIG. 4B, the guide rod 10 is provided so as to penetrate the plurality of cylindrical energy absorbing members 9 and the spacers 6. Thus, the guide rod 1
0, etc., the cylindrical energy absorbing member 9 is fixed in the space, and the spacing member 6
, It is crushed in a certain direction, so that the pressure receiving state of energy at the time of collision can be equalized. Therefore, the crushing form of each cylindrical energy absorbing member 9 becomes substantially equal, and the energy absorbing ability is stabilized. Further, scattering of the cylindrical energy absorbing member 9 at the time of crushing due to a vehicle collision is prevented.

In the illustrated example, the cylindrical energy absorbing member 9
Are arranged in two rows, but this can be arranged in one row,
Conversely, three or more rows can be arranged. The traveling speed of the vehicle differs depending on the type of road such as an urban road and an expressway, and the collision energy naturally differs.Therefore, if the number of arrays is appropriately selected and installed according to the installation location of the end of the protective fence end buffer device, Good.

As shown in FIG. 5, it is desirable that the vertical dimension of the spacer 6 be equal to or longer than the length of the cylindrical energy absorbing member 9. By doing so, the collision energy when the vehicle collides with the shock absorber can be transmitted to each cylindrical energy absorbing member 9 via the spacer 6 evenly.

As the cylindrical energy absorbing member 9, a material having elasticity and plasticity, which are not so strong as material characteristics, such as a steel cylinder and a resin cylinder, can be used. A very light collision can be dealt with only in the elastic region, and can be restored and reused after the collision. In the case of a large collision, there is a risk that the vehicle after the collision will be rejected only in the elastic region of strong elasticity, and energy absorption in the plastic region is necessary. It is preferable to provide a difference in the crushing characteristics of the cylindrical energy absorbing member 9 according to the arrangement position. For example, a material that is easily crushed is disposed on the side near the end, and a material that is not easily crushed is disposed as the distance from the end increases. The crushing characteristics of the cylindrical energy absorbing member can be differentiated by changing the plate thickness, diameter, cross-sectional shape, number of used members, and material of the cylindrical energy absorbing member, or by combining these changes. For example, the diameter is increased on the side closer to the end, and gradually reduced as the distance from the end increases.

FIG. 4 shows one unit of the sliding beam 3 in two rows. In the example shown in FIG. 1, two of the sliding beams 3 are arranged in series, and the sleeve beam 4 is fixed to the end thereof. However, depending on the magnitude of the anticipated collision energy,
Only one can be arranged, or three or more can be arranged in series. Since the collision energy greatly varies under conditions such as a light vehicle to a heavy vehicle, a high speed to a low speed, and the like, it is possible to cope with these different magnitudes of collision energy by appropriately selecting the number arranged in series.

In the example shown in FIGS. 1 and 2, the cylindrical energy absorbing member is not disposed in the space inside the sleeve beam 4 at the tip end only by providing the end cushioning material 14, One or more cylindrical energy absorbing members can be arranged in the most advanced space. The guide rod 10 does not penetrate the cylindrical energy absorbing member disposed here,
Alternatively, it is held by being connected to the end cushioning member 14 with bolts and nuts (in the case of a plurality, the cylindrical energy absorbing members are also connected with bolts and nuts).

FIG. 6 shows a front view of the sliding beam 3. At the upper and lower ends of the sliding beam 3, claw members 13 which are fixed to the guide member 2 or the upper and lower ends of the sliding beam 3 adjacent to the rear and are slidable are fixedly provided. At the time of a vehicle collision, this claw member 1
Using the guide 3 as a guide, the slide beam 3 slides backward along the guide member 2 or the slide beam 3 adjacent to the rear. As another mode of the guide for the backward sliding, a horizontally long hole is provided at the same height position of the sliding beam 3 and the guide member 2 so that the sliding beams 3 can be mutually or the sliding beam 3 and the guide member 2. It is also possible to connect them with bolts and nuts.

FIG. 7 shows an example in which a guide rail 12 having a substantially groove-shaped cross section is provided on the ground in the movable range of the sliding column 8 of the sliding beam 3. The fixed support column 7 at the forefront has a function as a guide rail anchor for keeping the guide rail 12 itself from moving during a vehicle collision. When the sliding beam 3 is connected to the guide member 2, if the lower end of the sliding column 8 is slidably held by the guide rail 12, the protective fence end buffer device of the present invention shown in FIG. 1 is obtained. Can be By doing so, the claw member 13 and the guide rod 1
In conjunction with the sliding of 0, when the vehicle collides with the shock absorbing device, the backward sliding of the front end of the shock absorbing device can be controlled substantially linearly. Further, if the guide rail 12 is provided on the ground, it is not necessary to provide a concrete foundation in the sliding range of the sliding support 8 of the sliding beam 3.

Further, the guide rail 12 preferably has a function of not only controlling the sliding direction of the sliding column 8 in a horizontal plane but also preventing the tip from being lifted in the event of a collision. . For example, as shown in FIGS. 4 and 5, a flange 15 is provided at the lower end of the sliding support column 8, and the upper ends of both side plates of the groove of the guide rail 12 are bent inward into the groove to be locked with the flange 15. . This way,
In the case of a frontal collision, it is possible to prevent the front end of the protective fence end buffer device from rising due to collision energy.
Further, it is also possible to suppress the twisting and bending of the protective fence end buffer device due to the offset collision and the oblique collision. In addition,
At the upper end of the guide rail 12, a laterally protruding flange is provided, and at the lower end of the sliding column 8, a claw member engaging with the flange is provided to prevent the sliding column 8 from sliding while controlling the sliding direction. There are various types of specific means for performing the method, and any of these various means can be employed in the present invention.

[0031]

In the protective fence end buffer device according to the present invention, the cylindrical energy absorbing member is fixed in the space, and is crushed in a certain direction by the spacing member as the guide rod slides. Therefore, the pressure receiving state of energy at the time of collision can be equalized. Therefore, the crushing form of each cylindrical energy absorbing member becomes substantially uniform, and the energy absorbing ability is stabilized, so that the problem that the energy absorption is uneven and the safety level has to be taken large conventionally can be solved. . Further, scattering of the cylindrical energy absorbing member at the time of crushing due to a vehicle collision can also be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view (FIG. 1 (a)) and a side view (FIG. 1 (b)) showing an example of a protective fence end buffer device of the present invention.

FIG. 2 is a plan view (FIG. 2A) and a side view (FIG. 2A) showing a state in which a guide member is fixed and a sliding beam or the like is not yet connected in an example of the protective fence end buffer device of the present invention. FIG.

FIG. 3 is a plan view showing an example of the protective fence end buffer device of the present invention, omitting a cylindrical energy absorbing member and the like.

FIGS. 4A and 4B are a plan view (FIG. 4A) and a side sectional view (FIG. 4B) showing in detail the arrangement of the cylindrical energy absorbing member 9 in the example of the protective fence end buffer device of the present invention. is there.

FIG. 5 is a diagram showing a cross section taken along line AA of FIG. 4 (b).

FIG. 6 is a front view of a sliding beam.

FIG. 7 is a diagram showing an example in which guide rails are provided on the ground in the movable range of a sliding support of a sliding beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road protective fence 2 Guide member 3 Sliding beam 4 Sleeve beam 5 Spacing material 6 Spacing material 7 Fixed support 8 Sliding support 9 Cylindrical energy absorbing member 10 Guide rod 11 Guide rod receiving material 12 Guide rail 13 Claw member 14 End buffer material 15 Flange

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000101949 Sumitomo Metal Construction Materials Co., Ltd. 2-1-1, Edobori, Nishi-ku, Osaka-shi No. (71) Applicant 000231110 Nippon Kokan Light Steel Co., Ltd. 6100 Sankejiri, Kumagaya-shi, Saitama (72) Inventor Satoshi Kaji (72) Inventor Tetsuya Endo 46 Marushima-cho, Amagasaki City, Hyogo Prefecture Shinko Construction Materials Industry Co., Ltd. (72) Inventor Norihiko Kajimura 2-1-1 Edobori, Nishi-ku, Osaka City, Osaka No. Sumitomo Metal Building Materials Co., Ltd. (72) Inventor Koji Kawada 2-3-3 Nihonbashi Muromachi, Chuo-ku, Tokyo Inside Tokyo Seimitsu Co., Ltd. (7 2) Inventor Noriyuki Horikawa 2-9-3 Nakazuma, Ageo-shi, Saitama F-term (reference) 2D101 CA04 CA06 DA01 DA04 DA05 EA02 FA11 FA22 FA32 FB12 GA17 GA18 HA05 HA14 3J066 AA23 BA04 BB01 BC01 BD05 BD07 BE06 BF01 BG04

Claims (8)

[Claims] 1. Two rows of guide members are fixedly mounted at an end of a road protection fence with an interval, and two rows of sliding beams are slidably connected along the two rows of guide members. A sleeve beam is fixed to the tip of the sliding beam, and a spacing member is arranged and fixed at a predetermined interval between the two rows of guide members and the two rows of sliding beams. Erect sliding columns,
A plurality of cylindrical energy absorbing members are arranged in series in the space surrounded by the sliding beam and the spacer along the sliding direction of the sliding beam, and slide along the sliding direction of the sliding beam. An end shock absorber for a protective fence, wherein a possible guide rod is provided through the plurality of cylindrical energy absorbing members and the spacer. 2. The protective fence end buffer device according to claim 1, wherein a guide rail is provided on the ground within a movable range of the sliding support, and a lower end of the sliding support is slidably held. . 3. The protective fence end buffer device according to claim 1, wherein each of the two rows of sliding beams has two or more sliding beams arranged in series. 4. The sliding beam according to claim 1, wherein said guide member or said upper and lower ends of the sliding beam adjacent to the guide member are fixed to the upper and lower ends thereof. 3. The protective fence end buffer according to any one of 3. 5. The protective fence end buffer device according to claim 1, wherein a plurality of rows of the cylindrical energy absorbing members are arranged. 6. The protective fence end buffer device according to claim 1, wherein a cylindrical energy absorbing member is disposed also in a space in the sleeve beam. 7. The protective fence end buffer device according to claim 1, wherein a difference is provided in the crushing characteristics according to the position of the cylindrical energy absorbing member. 8. The protective fence end buffer according to claim 1, wherein a vertical dimension of the spacer is equal to or longer than a length of the cylindrical energy absorbing member.