JP3051400B1 - Piping protection sheet and method of forming the same - Google Patents

Abstract

An object of the present invention is to provide a shearing resistance and a direct impact resistance, and extremely easily perform a winding operation on a pipe.
Further, it is an object of the present invention to provide a pipe protection sheet which can be formed not only reliably and efficiently but also extremely easily, reliably, efficiently and inexpensively, and a method for forming the same. SOLUTION: Synthetic resin warp yarn 4 with high strength and good elasticity
a, 4b, 5a, 5b, upper and lower sheet members 2, 3
Are woven into a twill weave structure, and the upper and lower
At least one of the warp yarns 4a and 5a of the first and second members 2 and 3 is woven in two layers while being crossed and connected to the other weft yarns 4b and 5b at a predetermined pitch.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe which is wrapped around a pipe such as a gas pipe buried underground to effectively protect the pipe from being hit by a drilling tool or the like in required works such as road works and building works. And a method of forming the same.

[0002]

2. Description of the Related Art Heretofore, a protective sheet for a pipe of this type has been required to have a required number of sheet members woven in a plain weave with a required synthetic resin warp such as a flat yarn made of a polyethylene resin. Are laminated along a longitudinal direction thereof and joined via a required joining means such as a sewing machine (see JP-A-6-337090).

However, the prior art constructed as described above is composed of a sheet member woven in a plain weave of a synthetic resin warp such as a flat yarn made of a polyethylene resin. In the case where the excavation tool is directly hit by the inside, the protection function can be effectively exerted, but the sheet member itself is weak against shearing impact due to its material and shape. For this reason, when a shearing impact is applied to the excavation tool such that the excavation tool strikes from diagonally above and slides, the outer surface of the buried pipe has a defect that is easily damaged by scratching.

[0004] In order to solve the problems of the prior art, a required number of sheet members are woven in a plain weave structure using a flat yarn made of polypropylene excellent in shear impact resistance as a weft, and a sewing machine is sewn. Formed in a layer through a joining means such as A required number of sheet members are woven in a plain weave structure using polyethylene flat yarn and polypropylene flat yarn as weft yarns, respectively.
One that is formed in layers via a joining means such as sewing. A sheet member woven into a plain weave by a polyethylene flat yarn and a sheet member woven into a plain weave by a polypropylene flat yarn are appropriately combined with each other and joined by sewing means such as sewing. Formed in layers by Has been proposed to effectively provide shearing resistance and direct impact resistance to a drilling tool (see JP-A-8-75082).

[0005]

By the way, the prior art constructed as described above has the following problems, while effectively providing the shearing impact resistance and the direct impact resistance to the excavating tool. . First, the sheet member constituting the pipe protection sheet is woven in a plain weave structure using a flat yarn made of polyethylene or a flat yarn made of polypropylene as a weft, that is, one warp and a weft. Since it is woven so that it intersects while alternately moving up and down alternately, warp and weft yarns are kept to a minimum length and the formation is firmly tightened to form a very durable weave structure Things. For this reason, the use of synthetic resin yarn such as polypropylene, which has high strength and high elasticity, as the warp yarn, makes the woven structure itself inflexible, and as a result, the bending stiffness when wound around required pipes and mounted. However, the winding operation is very troublesome and troublesome, and the workability is extremely poor. Secondly, the conventional pipe protection sheet is formed by joining a required number of woven sheet members one by one by sewing, ultrasonic wave, high frequency wave, adhesive or heat welding. Therefore, a special joining device is required separately, and the production is very troublesome and troublesome, which not only leads to an increase in the production cost as a whole, but also does not always satisfy the joining strength. is there.

The present invention is intended to solve the above-mentioned conventional problems. The present invention not only has a resistance to shear impact and a resistance to direct impact but also makes the winding work on the pipe extremely easy and reliable. A pipe protection sheet that can be performed well, and a pipe protection sheet that can be formed very simply, reliably, efficiently, and inexpensively.
And a method for forming the same.

[0007]

That is, the first aspect of the present invention is a synthetic resin warp yarn 4a, 4b having high strength and good elasticity.
The required number of sheet members 2 woven by 5a and 5b
3 is connected to and formed in a laminated shape.
The invention is characterized in that the sheet members 2 and 3 are each woven in a twill weave structure.

According to a second aspect of the present invention, the upper and lower sheet members 2, 3 woven by synthetic resin warp yarns 4a, 4b, 5a, 5b having high strength and good elasticity are joined and laminated. In the protective sheet for piping formed as described above, the connection between the sheet members 2, 3 is performed by crossing at least one of the warp yarns 4a, 5a with the other weft yarn 4b, 5b at a predetermined pitch. SUMMARY OF THE INVENTION A gist of the present invention is a piping protection sheet characterized by being woven by the following method.

According to the third aspect of the present invention, each sheet member 2.
The gist of the present invention is a piping protection sheet according to claim 2, wherein each of the protection sheets is woven in a twill weave structure.

According to a fourth aspect of the present invention, the upper and lower sheet members 2.3 and 3 are woven with synthetic resin warp yarns 4a, 4b, 5a and 5b having high strength and good elasticity. -At least one of the warp yarns 4a, 5a of the first member 2, 3 is woven in a two-layered form while being crossed and connected to the other weft yarns 4b, 5b at a predetermined pitch.
The gist of the invention is a method of forming a pipe protection sheet.

According to a fifth aspect of the present invention, each sheet member 2.
The gist of the present invention is a method of forming a protective sheet for piping according to claim 4, wherein each of the protective sheets is woven in a twill weave structure.

[0012]

DETAILED DESCRIPTION OF THE INVENTION A synthetic resin warp yarn 4 according to the present invention.
As a.4b.5a.5b, a high-strength and highly elastic synthetic resin yarn, for example, a flat yarn or a split yarn of polyolefin, polystyrene, polyester, polypropylene, or polyamide is preferably used. use. And such synthetic resin warp yarn 4
The cross-sectional shapes of a, 4b, 5a, and 5b may be not only circular cross-sections but also triangular cross-sections, hexagonal cross-sections, and other required cross-sections. Flat yarns and split yarns may be used alone. Alternatively, the warp yarn 4a
4b, 5a, 5b, for example,
The warp yarns 4a and 5a are flat yarns,
It is advisable to combine b and 5b as appropriate, such as split yarns.

The upper and lower sheet members 2 and 3 are woven in a twill weave structure by the synthetic resin warp yarns 4a, 4b, 5a and 5b, that is, an appropriate number of warp yarns 4a and 5a are required. Floating on the wefts 4b and 5b, and a plurality of wefts 4b
Weave sequentially while sinking under 5b. The upper and lower sheet members 2 and 3 woven in such a twill weave structure have warp yarns 4.
Since the floating lengths of a, 4b, 5a, and 5b are much longer than the plain weave structure, the upper and lower sheet members 2.
The woven structure of No. 3 is loosened by the floating length to provide flexibility, so that not only can the work of winding around the pipe 8 be easily performed, but also the cushioning property can be absorbed by absorbing the impact. It is possible to exhibit an excellent effect on shearing impact resistance and direct impact resistance against excavating tools. In addition, as the above-mentioned twill weave structure, as shown in FIG. 2 to FIG.
1/4 oblique, 1/5 oblique, 2/2 oblique, 2/3 oblique, 1
It may be woven in a well-known twill weave structure such as a 2/1 / 1.2.1 oblique pattern.

Further, the upper and lower sheet members 2 according to the present invention.
3 is to cross the warp yarn 5a of the lower sheet member 3 with the weft yarn 4b of the upper sheet member 2 so as to form three stripes at regular intervals along the longitudinal direction as shown in FIGS. As shown in FIGS. 6A, 6B, and 6C, three strips may be connected to the center and both sides along the longitudinal direction, or a plurality of strips may be connected at predetermined intervals, or It is preferable to connect them as needed, such as connecting them obliquely orthogonally. Further, the upper and lower sheet members 2
No. 3 warp yarns 4a and 5a are crossed with and joined to the other weft yarns 4b and 5b, respectively, or the warp yarns 4a and 5b of the upper sheet member 2 and the warp yarns 5a and 5b of the lower sheet member 3 are joined together. May be layered by alternately connecting the upper and lower sides (so-called air weaving). The actual bonding is performed by weaving the upper and lower sheet members 2 and 3 and appropriately weaving the warp yarns 4a, 4b, 5a and 5b with each other by weaving means.
In this way, by joining the upper and lower sheet members 2 and 3 by weaving means, it is possible to form them extremely simply, firmly, very efficiently and inexpensively.

As shown in FIG. 1, on the upper sheet member 2, a required marking film 7 or the like, on which a caution character is displayed to attract the excavator's attention, is attached.
The edges of the upper and lower sheet members 2 and 3 may be heat-sealed to prevent fraying.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of the present invention. In the drawings, reference numeral 1 denotes a pipe protection sheet having a required width and length, and the pipe protection sheet 1 has a high height. Warp yarns 4a, 4b, 5a made of synthetic resin such as polypropylene with high strength and elasticity
The upper and lower sheet members 2.3 woven in a 1/2 oblique twill weave structure with 5b are joined to form a two-layer structure. The upper and lower sheet members 2 and 3 are connected with a suitable number of warps 5a constituting the lower sheet member 3 at a predetermined pitch to the corresponding wefts 4b of the upper sheet member 2. It is supposed that they are connected by intersecting, and 6 indicates the connection point. Reference numeral 7 denotes a marker film fused on the upper sheet member 2. In addition, reference numeral 8 denotes a pipe such as a gas pipe.

In order to form the protective sheet 1 for piping constructed as described above, first, necessary synthetic resin warp yarns 4a, 4b, 5a, 5b such as polypropylene.
Is set on the required loom, and the upper and lower sheet members 2 and 3 are woven into a 1/2 oblique twill weave structure.
Weft yarns 4b of the upper sheet member 2 corresponding to the appropriate number of warps 5a constituting the lower sheet member 3 at a predetermined pitch.
And woven together in a two-layer form. Then, the edges of the woven upper and lower sheet members 2 and 3 are heat-sealed to prevent fraying, and the required sign film 7 is fused onto the upper sheet member 2. Thereby, the pipe protection sheet 1 is formed. At this time, since the upper and lower sheet members 2 and 3 are woven and joined together, the joining work is extremely easy and surely performed efficiently without requiring any special device. I can do it.

The embodiment constructed as described above is used by being wound around a pipe 8 such as a gas pipe, similarly to the conventional example (see FIG. 5). In such use, the upper and lower sheet members 2.3 constituting the pipe protection sheet 1 are woven in a twill weave structure, and the warp yarns 4a / 4b / 5a / 5.
Because the floating length of b is very long,
The woven structure of the upper and lower sheet members 2 and 3 is loosened by that much and has flexibility, and thus, the winding work on the pipe 8 can be performed extremely easily. In addition, the twill weave structure can absorb the impact to enhance the cushioning property, or the warp yarns 4a, 4b, 5a, 5b constituting the upper and lower sheet members 2, 3 have high strength and elasticity. In addition to being made of a good synthetic resin yarn such as polypropylene, it is possible to sufficiently provide shearing resistance and direct impact resistance to a drilling tool.

FIGS. 6A, 6B, and 6C show another embodiment of the present invention, in which upper and lower sheet members 2.3 constituting a pipe protection sheet 11 are centered along the longitudinal direction. And the upper and lower sheet members 2 and 3 constituting the pipe protection sheet 21 at predetermined intervals along the longitudinal direction thereof. The upper and lower sheet members 2 and 3 constituting the pipe protective sheet 31 are connected via obliquely orthogonal connecting points 36. The point of the connection is different from that of the above embodiment, and the other portions are the same, and the same reference numerals indicate the same portions.

In the above embodiment, the upper and lower sheet members 2 and 3 are woven in a 1/2 oblique twill weave structure. However, the present invention is not limited to this. 1/3
It may be woven into a required twill weave structure such as oblique. Further, the upper and lower sheet members 2 and 3 are configured so that the warp 5a of the lower sheet member 3 is crossed with the weft 4b of the upper sheet member 3 and connected thereto, but the invention is not limited to this. Not the warp yarns 4a, 5a of the upper and lower sheet members 2, 3.
And the other weft yarns 4b and 5b are interlaced and connected, or the warp yarns 4a and 4b of the upper sheet member 2 and the warp yarns 5a and 5b of the lower sheet member 3 are alternated up and down. It is also possible to bond (so-called air weave).

[0021]

Since the present invention is configured as described above, the following effects can be obtained.

Since the sheet members 2 and 3 are woven in a twill weave structure with synthetic resin warp yarns 4a, 4b, 5a and 5b having high strength and good elasticity, the warp yarns 4a, 4b, 5a and 5 are used.
The floating length of b is very long compared to the conventional plain weave,
The woven structure of the sheet members 2 and 3 is loosened and flexible. For this reason, the work of winding the pipe protection sheet 1 around the pipe 8 can be performed extremely easily and with good workability, and the high-strength and elastic synthetic resin warp yarns 4a, 4b, 5a, and 5b can be used. Together with this, it has sufficient shear resistance and direct impact resistance to the excavation tool.

The upper and lower sheet members 2 and 3 are arranged so that at least one of the warp yarns 4a and 5a has
The connection between the upper and lower sheet members 2 and 3 can be performed reliably and firmly because the connection is made by interlacing with the members b and 5b.

High-strength and highly elastic synthetic resin warp 4a
The upper and lower sheet members 2.3 are woven with 4b, 5a and 5b, and at least one of the warps 4a and 5a of the upper and lower sheet members 2.3 with a predetermined pitch and the other weft yarn 4b and 5b, which are woven in two layers while being joined and joined together, so that the joining between the upper and lower sheet members 2 and 3 can be done without any special device. It can be formed very easily, reliably and with good workability at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention.

FIG. 2 is a partially enlarged plan view showing a main part of the embodiment.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a cross-sectional view showing a use state of the embodiment.

FIG. 6 is a perspective view showing another embodiment of the present invention.

[Explanation of symbols]

 1.1,21,31 Piping protection sheet 2 Upper sheet member 3 Lower sheet member 4a Warp 4b Weft 5a Warp 5b Weft 6.16,26,36 Junction point 7 Marking film 8 Piping

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16L 57/00 B32B 5/26

Claims (5)

(57) [Claims] 1. A synthetic resin warp yarn 4a having high strength and good elasticity.
A pipe protection sheet formed by connecting required number of sheet members 2.3 woven by 4b, 5a and 5b to form a laminated structure, wherein each of the above sheet members 2 -3 is a protective sheet for piping characterized by being woven in a twill weave structure. 2. A synthetic resin warp yarn 4a having high strength and good elasticity.
A pipe protection sheet formed by connecting upper and lower sheet members 2.3 woven by 4b, 5a, and 5b to form a laminated structure, wherein each of the sheet members 2. A protective sheet for piping, characterized in that the bonding of 3 is woven by interlacing at least one of the warps 4a, 5a with the other weft 4b, 5b at a predetermined pitch. 3. The protective sheet for piping according to claim 2, wherein each of said sheet members is woven in a twill weave structure. 4. A high-strength and highly elastic synthetic resin warp yarn 4a.
The upper and lower sheet members 2.3 are woven with 4b, 5a and 5b, and at least one of the warps 4a and 5a of the upper and lower sheet members 2.3 with a predetermined pitch and the other weft yarn A method for forming a protective sheet for piping, characterized in that it is woven in two layers while being joined and bonded to 4b and 5b. 5. A method according to claim 4, wherein each of said sheet members is woven in a twill weave structure.