JPH075831A - Display sheet for burried object - Google Patents

Abstract

PURPOSE:To provide the display sheet for an buried object which is light in weight, flexible and easy to handle, displayed characters are easily visible and can be searched by a metal searcher. CONSTITUTION:This display sheet 1 for the buried object is constituted by printing one surface of a band-shaped non-woven fabric 11, in which stretched yarns formed by splitting a stretched polyethylele (PE) film along the stretching direction are orthogonally arranged in the vertical and horizontal directions, and is adhered to the intersected points of respective pieces of the yarn, by printing ink contg. aluminum powder pigments over the entire surface thereof and laminating a protective layer 13 consisting of a PE film on the printed surface 12 with an adhesive 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried object display sheet used for detecting from the ground the presence of power lines, water pipes, gas pipes, communication lines, etc. buried in the ground.

[0002]

2. Description of the Related Art When repairing power lines, water pipes, gas pipes, communication lines, etc. buried in the ground or performing another excavation work near them, damage may be caused by a power shovel during excavation work, In order to prevent the occurrence of a major accident, a strip-shaped sheet that can be detected by a metal detector is embedded above the embedded object, and the sheet detects the presence of the embedded object.

For example, according to Japanese Patent Application Laid-Open No. 59-159171 (Prior Art 1), a substance such as a metal foil, a metal fiber or the like which can be detected by a metal detector on a base fabric made of a long belt-shaped synthetic resin woven fabric or the like. There is known an underground buried object marking in which a protective sheet made of a synthetic resin film is stuck or laminated and fixed on the surface of the substance.

Also, in Japanese Patent Laid-Open No. 55-40877 (Prior Art 2), reverse letters are printed in advance on the back surface of a transparent synthetic resin thin film sheet, and the sheet is laminated on a sheet made of a tough material. A method for manufacturing an underground buried object display sheet is described.

[0005]

In the prior art 1 described above, the aluminum foil or the metal fibers are laminated on one surface of the base fabric, and therefore the physical properties of the aluminum foil or the metal fibers, that is, the rigidity, appears, and the flexibility is lacking. , Becomes difficult to handle. Further, according to the conventional technique 2, since characters are printed with ordinary ink, it cannot be detected by a metal detector, and the existence of the buried object cannot be known until the display sheet is dug up to find the display sheet. In any of the above cases, there is a problem that the metal foil is likely to have a crease and the displayed characters are difficult to see.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems of the prior art, and to provide an embedded object display sheet which is light and flexible, easy to handle, easy to see displayed characters, and which can be detected by a metal detector. To do.

[0007]

According to the buried object display sheet of the present invention as set forth in claim 1, printing or metal deposition with an ink containing a metal powder pigment is carried on one surface of a long belt-shaped base cloth made of synthetic resin fiber. It is characterized by being applied.

Further, in the embedded object display sheet according to the second aspect of the present invention, reverse characters are printed on one surface of a long strip-shaped transparent synthetic resin film with an ink containing a metal powder pigment, and the printed surface is synthesized. It is characterized in that it is laminated on one surface of a base fabric made of resin fiber.

The base fabric made of synthetic resin fibers used in the present invention is a woven fabric or, for example, a stretched yarn obtained by thinly splitting a stretched polyethylene film along the stretching direction is arranged in parallel with each other. A non-woven fabric in which the intersections of the respective yarns are adhered to each other and the surface of such a woven fabric or non-woven fabric is coated with polyethylene resin or the like is preferable. The ink containing the metal powder pigment may be any ink containing a conductive metal powder such as aluminum or copper that can be detected by a metal detector.

In the buried object display sheet according to the first aspect, printing or metal vapor deposition may be performed on the entire surface of the base fabric or may be partially performed such as characters. Further, it is preferable that a protective layer such as a transparent synthetic resin film is provided on the printed or metal-deposited surface. The protective layer can be provided by a method such as extrusion lamination of synthetic resin, adhesion with an adhesive, or coating. Examples of the metal vapor deposition layer provided include a low-density polyethylene vapor deposition film manufactured by Toyo Metalizing Co., Ltd. on which aluminum is vapor deposited.

The synthetic resin film used for the buried object display sheet according to the second aspect may be any one that has flexibility such as polyethylene, polypropylene, polyamide, vinyl chloride, etc. and is tough and printable. The surface is preferably subjected to corona discharge treatment. Reverse characters are printed with the ink on one surface of the synthetic resin film. In order to protect the printing surface, the printing surface is placed inside so that it is attached to the base cloth, so that the characters are printed as reverse characters.

[0012]

In the buried object display sheet according to the first aspect of the invention, the metal powder pigment or the metal vapor deposition layer in the printing ink can detect with a metal detector from the ground. Since the surface to be detected is a printing ink or a metal vapor deposition layer, it is thinner than the aluminum foil, and the physical properties of the base fabric are directly visible, so it is lightweight, flexible, and has no wrinkles or creases, which makes it easy to handle.

In the embedded object display sheet according to the second aspect, since the printed surface of the reverse character is attached to the base cloth, the character appears correctly from the surface and the printed surface is protected by the base cloth and the synthetic resin film. Further, since the ink contains a metal powder pigment, it can be detected from the ground by a metal detector. Since the surface to be detected is printing ink, it is thinner than the aluminum foil, and the physical properties of the base fabric are directly visible, so it is lightweight, flexible, easy to handle, and has no wrinkles or creases, so the display is easy to read.

[0014]

Embodiments of the present invention will now be described with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional view showing an embodiment of the buried object display sheet according to the present invention. Buried object display sheet 1
Is a band-shaped nonwoven fabric 11 in which stretched yarns formed by splitting a stretched polyethylene film along the stretching direction are arranged orthogonally in the longitudinal and transverse directions, and the intersections of the respective yarns are bonded together.
The entire surface is printed with a printing ink containing an aluminum powder pigment on one surface, and a protective layer 13 made of polyethylene film is laminated on the printed surface 12 with an adhesive 14.

This product is lightweight, and the physical properties of the strip-shaped nonwoven fabric appear as they are, and they are highly flexible. They are easy to handle during transportation and construction, and can be easily detected by a metal detector after construction.

(Embodiment 2) FIG. 2 is a sectional view showing an embodiment of the buried object display sheet according to the present invention. The buried object display sheet 2 was printed with reverse characters 23 on the treated surface of the polyethylene film 22 having one surface subjected to corona discharge treatment with the same printing ink as used in Example 1, and the printed surface was used in Example 1. An adhesive 24 is laminated on the surface of the same band-shaped nonwoven fabric 21 as that used.

This is a laminate of a synthetic resin film and a base cloth, but it is flexible, easy to handle during transportation and construction, can be easily detected by a metal detector after construction, and the printed surface is durable. He was excellent in sex.

[0018]

According to the buried object display sheet of the first aspect of the present invention, it is possible to detect from the ground with a metal detector. The embedded object display sheet is light in weight because the physical properties of the base fabric are directly displayed, and is flexible and easy to handle because it does not have wrinkles or creases.

Further, according to the embedded object display sheet of the present invention, since the printed surface of the reverse character is attached to the base cloth, the character appears correctly from the surface and the printed surface is protected by the base cloth and the synthetic resin film. And has excellent durability. Also, it can be easily detected from the ground with a metal detector. The buried object display sheet is lightweight because the physical properties of the base cloth are directly displayed,
The display is easy to read and easy to handle because it is flexible and does not have wrinkles or folds.

[0020]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an embedded object display sheet according to the present invention.

FIG. 2 is a sectional view showing another embodiment of the buried object display sheet according to the present invention.

[Explanation of symbols]

 1,2: Embedded object display sheet 11,21: Base cloth 12,23: Printing surface 13: Protective layer 14, 24: Adhesive

Claims (2)

[Claims] 1. An embedded object display sheet, characterized in that one surface of a long belt-shaped base cloth made of synthetic resin fiber is printed with an ink containing a metal powder pigment or metal vapor deposition is applied. 2. An inverted character is printed on one surface of a long strip-shaped transparent synthetic resin film with an ink containing a metal powder pigment, and the printed surface is attached to one surface of a base cloth made of synthetic resin fiber. The buried object display sheet, which is characterized in that