JP7198150B2 - Wire rope cover for wire rope guard fence - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wire rope cover suitable for a wire rope guard fence mainly used to mark the alignment and centerline of roads.

As a means for indicating the center line (center line) on expressways and general roads, as disclosed in Patent Document 1 and Patent Document 2, a large number of signposts are erected at appropriate intervals in the direction of travel. It has been known. Further, as disclosed in Patent Document 3 and Patent Document 4, there is known a protective fence composed of columns arranged at appropriate intervals and guardrails or panels constructed over adjacent columns.

The former means of using a signpost has the advantages of being inexpensive and requiring a short construction period, and is often used, but it is disadvantageous in that it cannot prevent oncoming vehicles from overhanging. The latter method, which uses protective fences, is disadvantageous in that construction costs are relatively high, but it is highly evaluated in that it is effective in preventing oncoming vehicles from overhanging.

Therefore, a protective fence using a wire rope (eg, Patent Document 5) is being used as a barrier that prevents an oncoming vehicle from sticking out while suppressing an increase in cost. This wire rope guard fence is becoming popular, for example, as a median marker in a temporary two-lane section of an expressway to prevent a driver from jumping into the oncoming lane.

JP 2015-206170 A JP 2009-299306 A JP-A-9-49216 JP-A-10-18236 JP 2011-208491 A

When a wire rope guard fence is used as a median strip, it is preferable that it has a function to prevent oncoming vehicles from jumping out, but contact with the metal wire rope can damage the running vehicle. points have been pointed out.

It is an object of the present invention to provide a cover to cover the wire rope so as to avoid as much as possible the problem of "damage to the traveling vehicle body due to contact with the wire rope", which is the problem when using the wire rope type guard fence. , to develop and provide a wire rope cover.

The present invention is a wire rope cover for a wire rope type protective fence , which has a cylindrical cover body 2 and a notch 3 formed through the cover body 2 in the direction of the axis P,
The cover main body 2 is characterized by being formed from a core material 4 made of synthetic resin and a main material 5 made of synthetic resin softer than the core material 4 and covering the core material 4 .

The one end 3a and/or the other end 3b of the cut 3 is preferably formed in a groove shape in which the width of the cut increases toward the ends in the axial center P direction. It is convenient for the main material 5 to be made of a synthetic resin of the same type as the core material 4 and having a low hardness. The core material 4 is made of hard vinyl chloride resin, and the main material 5 is made of soft vinyl chloride resin It is more convenient if

The hardness da of the main material is 50 to 90 (50 ≤ da ≤ 90), and the hardness db of the core material is 60 to 90 (60 ≤ db ≤ 90 ). In this case, the hardness da of the main material is 60 to 75 (60 ≤ da ≤ 75) in durometer A hardness, and the hardness db of the core material is 65 to 85 (65 ≤ db ≤ 85) in durometer D hardness. and even better.

Further, it is convenient that the core material 4 is formed in a coil shape and the main material 5 is formed in a cylindrical shape. Further, it is more convenient if a reflector 8 is provided on the outer surface 2a of the cover body 2. As shown in FIG. Also, the main material 5 may be made of a synthetic resin mixed with a phosphorescent material.

The present invention resides in that a wire rope cover suitable for use over a wire rope is made of two materials with different softness (hardness).
For example, with a wire rope cover made of a single material, if the softness (hardness) is set with an emphasis on workability when attaching to the wire rope, the strength (impact resistance) when in contact with a moving vehicle will not be sufficient. There is On the other hand, if the softness (hardness) is set so that the strength (impact resistance) is emphasized, the spring constant becomes high, making it difficult to attach the wire rope to the wire rope, resulting in poor workability. Therefore, there is room for improvement in wire rope covers made of one material.

The wire rope cover according to the present invention consists of a core made of a hard material and a main material made of a soft material covering the core. There is an advantage that it is possible to combine the impact resistance strength when the vehicle contacts strongly.

As a result, the wire rope cover that is used to cover the wire rope so as to avoid as much as possible the problem of "damage to the traveling vehicle body due to contact with the wire rope", which is a problem when using a wire rope type guard fence. can be provided.

The wire rope cover is shown, (A) is a bottom view, and (B) is a cross-sectional view cut along the ZZ line of FIG. 1 (A). The procedure for attaching the wire rope cover to the wire rope is shown, (A) is the diameter expansion process of the wire rope cover, and (B) is the covering process. Side view showing an example of attachment to a wire rope guard fence

EMBODIMENT OF THE INVENTION Below, embodiment of the wire rope cover by this invention is described, referring drawings.

[Embodiment 1]
As shown in FIGS. 1A and 1B, the wire rope cover 1 has a cylindrical cover body 2 and a cut (slit) 3 formed through the cover body 2 in the direction of the axis P. is configured as The cover main body 2 is composed of a core material 4 made of a flexible hard material and a main material 5 made of a material softer than the core material 4 and having flexibility and covering the core material 4 .

The core material 4 is made of synthetic resin and formed into a circular coil shape by spirally winding a circular material. The main member 5 is a cylindrical member that is made of synthetic resin and covers and encloses the core member 4 . In the wire rope cover 1, as shown in FIG. 1(B), the core material 4 is embedded in the main material 5, and if the core material 4 can be seen from the outside, the axis P direction (longitudinal direction) is only on each end face of

As shown in FIG. 1(A), one end 3a and the other end 3b of the cut 3 in the direction of the axis P have a groove shape (front end) in which the width of the cut increases toward the ends in the direction of the axis P. It is formed in a spreading shape). By providing these groove-shaped ends 3a and 3b, there is an advantage that the mounting work (described later) on the wire rope becomes easier.

The wire rope cover 1 is formed by, for example, extrusion molding, by spirally extruding and winding the main material 5 containing the core material 4, thereby integrating the main material 5 and forming a cylinder containing the coil-shaped core material 4. A cover prototype of the shape is created. Then, the wire rope cover 1 shown in FIG. 1(A) is produced by processing the original shape of the cover and providing the cuts 3 .

Also, the wire rope cover 1 can be a wire rope cover 1 in which the core member 4 can be seen from the outside at locations other than the end faces in the longitudinal direction. For example, the wire rope cover 1 may have a structure in which the core material 4 protrudes radially inward from the main material 5 and is exposed on the inner surface side.

An example of use of the wire rope cover 1 is shown in FIG. As the median strip of the expressway W, a large number of pillars 6 erected at appropriate intervals, and a plurality of (eg, 5) wire ropes 7 are erected in a vertical row over the pillars 6. A wire rope cover 1 according to Embodiment 1 is applied to a wire rope guard fence A having a structure that is constructed as shown in FIG.

In FIG. 3, as one installation example, two wire rope covers 1, 1 are provided for the wire ropes 7 in odd-numbered rows in the vertical direction, and one wire rope cover is provided for the wire ropes 7 in even-numbered rows. Equipped with cover 1. In addition, in FIG. 3, the dimension ratio of each part such as the interval between the adjacent struts 6, 6 is not limited to that shown in the figure.

In order to attach the wire rope cover 1 to the wire rope 7, first, as shown in FIG. A diameter-enlarging process is performed to expand the diameter to a possible size. Next, the wire rope cover 1 is moved to cover the wire rope 7 from the enlarged cut 3 as shown in FIG. 2(B). Although the wire rope 7 is drawn as a bundle of three wires 7a, it is not limited to this.

In the covering step, when the open state of the wire rope cover 1 is released, the wire rope cover 1 is elastically closed and displaced so that the notch 3 becomes the base width as shown in FIG. Installation to the is completed. In FIG. 2(B), the wire rope cover 1 is loosely fitted to the wire rope 7, but if the wire rope cover 1 is tightly fitted to the wire rope 7 due to elasticity, This is advantageous in that the displacement of the wire rope cover 1 is suppressed or avoided, and the position can be fixed.

For example, in the case of a wire rope cover made of a single material, if the softness (hardness) of the wire rope cover is emphasized on the workability of attaching it to the wire rope 7, it lacks strength when it comes in contact with a traveling vehicle. Moreover, there is also a disadvantage that it becomes easy to come off after attachment. On the other hand, if the strength is emphasized, or if the softness (hardness) is set so that it is difficult to remove after attachment, the spring constant will increase, making it difficult to attach to the wire rope, resulting in poor workability. Even in the case of , there is room for improvement.

As shown in FIG. 3, on a road provided with a wire rope guard fence A with a wire rope cover 1, even if a vehicle such as an automobile contacts the wire rope 7 in an attempt to jump into the oncoming lane, Since the wire rope cover 1 made of synthetic resin is attached, there is an advantage that damage to the traveling vehicle body, the two-wheeled vehicle body, etc. is greatly suppressed or avoided compared to the case of contact with the metal wire rope 7. - 特許庁

Since the wire rope cover 1 is composed of the core material 4 made of a hard material and the main material 5 made of a soft material covering the core material 4, the wire rope cover 1 is flexible enough to be easily elastically deformed when attached to the wire rope 7. , and impact resistance when a moving vehicle such as an automobile comes into strong contact. For example, in a wire rope cover made of only the main material 5, it is difficult to restore the width of the original cut after widening the cut 3 and attaching it to the wire rope. Since it is inserted, it is easy to restore to the original width of the cut, and it also has the advantage of being difficult to come off after installation.

Further, as shown in FIG. 3, a reflective member (an example of a reflector) 8 is provided on the entire surface or part of the outer surface 2a (of the cover body 2) of the wire rope cover 1, or in a concave portion of a flexible surface. It would be convenient if As the reflecting member 8, a reflecting sheet that diffusely reflects light is preferable because the visibility of the wire rope cover 1 (of the wire rope 7) at night is clearly improved. The concave portion of the flexible surface is a concave portion in the case of the wire rope cover 1 (not shown) having a bellows-like appearance.

An embodiment of the wire rope cover 1 will be described.
[Example 1]
A soft vinyl chloride resin in which the main material 5 has a hardness da of 50 to 90 (50≦da≦90) in durometer A hardness.
A hard vinyl chloride resin in which the hardness db of the core material 4 is 60 to 90 (60≦db≦90) in durometer D hardness.
・The diameter of the core material 4 is 2.5 to 3.0 mm, and the spiral pitch is 4 to 5.5 mm.
When the hardness da of the main material 5 is converted into durometer D hardness, it corresponds to approximately 13 to 40. Naturally, the hardness db of the core material 4 is higher than the hardness da of the main material 5 .

[Example 2]
A synthetic resin in which the hardness da of the main material 5 is 60 to 75 (60≦da≦75) in durometer A hardness.
A synthetic resin in which the hardness db of the core material 4 is 65 to 85 (65≦db≦85) in durometer D hardness.
・The diameter of the core material 4 is 2.0 to 9.0 mm, and the spiral pitch is 4.0 to 24 mm.
・The material of the main material 5 is a soft vinyl chloride resin ・The material of the core material 4 is a hard vinyl chloride resin When the hardness da of the main material 5 is converted to durometer D hardness, it corresponds to approximately 17 to 27. The hardness db of the core material 4 is higher than the hardness da of the main material 5 .

[Example 3]
- The cross-sectional shape and coiled shape of the core material 4 may be circular, elliptical, square, polygonal, or the like.

[Another example]
- The material of the main material 5 is not limited to soft vinyl chloride resin, and may be any one of TPU, TPO, nylon, silicone rubber, and the like.
- The material of the core material 4 is not limited to rigid vinyl chloride resin, and may be polypropylene resin, high-density polyethylene resin, acrylic resin, ABS resin, or the like.

The wire rope cover 1 may have a structure in which the core material 4 is attached to the inside of the main material 5 or a structure in which the core material 4 is attached to the outside of the main material 5 .
The reflector 8 can be changed and set in various ways, such as a rectangular or circular irregular reflection sheet.
Also, the main material 5 may be made of a synthetic resin mixed with (compounded) a luminous material, which has the advantage of making the wire rope cover 1 more visible by shining the main material 5 at night.

2 cover body 2a outer surface 3 notch 3a one end 3b other end 4 core material 5 main material 8 reflector P axial center

Claims (9)

having a cylindrical cover body and a notch formed through the cover body in the axial direction,
A wire rope cover for a wire rope guard fence , wherein the cover main body is formed of a core material made of synthetic resin and a main material made of synthetic resin softer than the core material and covering the core material. 2. The wire rope for a wire rope protective fence according to claim 1, wherein one end and/or the other end of said cut is formed in a groove shape in which the width of the cut increases toward the end in the axial direction. cover. The wire rope cover for a wire rope guard fence according to claim 1 or 2, wherein the main material is the same type as the core material and is made of synthetic resin having low hardness. The wire rope cover for a wire rope guard fence according to claim 3, wherein the core material is made of hard vinyl chloride resin and the main material is made of soft vinyl chloride resin. The hardness da of the main material is 50 to 90 (50 ≤ da ≤ 90) as measured according to type A of the durometer hardness test method for plastics (JIS K 7215), and the hardness of the core material is db. is 60 to 90 (60≦ db ≦90) as measured in accordance with type D of the test method. The hardness da of the main material is 60 to 75 (60 ≤ da ≤ 75) as measured according to Type A of Durometer Hardness Test Method for Plastics (JIS K 7215), and the hardness of the core material is db. is 65 to 85 (65≦ db ≦85) as a value measured according to the type D of the test method. The wire rope cover for a wire rope guard fence according to any one of claims 1 to 6, wherein the core material is formed in a coil shape and the main material is formed in a cylindrical shape. The wire rope cover for a wire rope guard fence according to any one of claims 1 to 7, wherein a reflector is provided on the outer surface of the cover body. The wire rope cover for a wire rope protective fence according to any one of claims 1 to 7, wherein the main material is made of a synthetic resin mixed with a phosphorescent material.

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