JP2002039438A - Buried marker sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the fracture of a buried matter without being broken by a excavator by inhibiting the sinking of the excavator in burying a buried marker sheet just above the buried matter buried at a position of a depth half of the conventional depth. SOLUTION: This buried marker sheet 1 has a sheet strip 5 made of a desired material and having a predetermined rupture strength, on its rear face. Its attachment strength is determined to allow the buried marker sheet 1 to be easily separated when it is pulled with the predetermined force by the excavator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a water pipe, a sewer pipe,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a buried marker sheet that is buried directly above an underground object such as a gas pipe and a high-voltage power cable, and that informs an operator of the presence of the object immediately below the ground when excavating the ground.

[0002]

2. Description of the Related Art When repairing water pipes, gas pipes, high-voltage power cables, and the like buried underground, or when burying a new buried object near an existing buried object, excavation of the ground is required. Work is required. At this time, the work is usually performed by an excavator such as a power shovel.

However, if these excavating machines dig vigorously, the buried object may be inadvertently damaged. For this purpose, a buried sign sheet printed with sign characters such as "Water pipe caution", "Be aware of the water pipe under this, please seek witness", etc., is buried directly above the buried object. In this way, workers are informed of the existence of the buried object, thereby preventing breakage.

[0004] When burying a buried object such as a water pipe or a gas pipe, the depth from the ground surface is determined. It depends on the object to be buried, for example 120 cm for water pipes. However, this depth will be revised in half in the future.

[0005] When the burying depth is changed as described above,
The depth varies depending on the existing buried object, and when digging the ground to repair a buried object at a shallow position from the buried surface according to the new standard, workers mistakenly think that the depth is the same as the conventional one, It is possible that a digging machine such as a power shovel digs deeply and deeply.

[0006] In this case, there is a possibility that a part of the buried sign sheet near the ground surface (about 30 cm) is strongly pulled downward by a digging machine such as a power shovel, and may be extended and broken. is there. When the sheet is broken, the buried marker sheet does not catch on the excavated body of the excavator such as the power shovel and cannot be lifted. For this reason, the worker cannot be notified of the existence of the buried object, and there is a risk that the buried object may be damaged. In this case, there is no point in burying the buried marker sheet.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to be used when a buried object is buried directly above a buried object at a half depth of a conventional structure. Without breaking by excavators such as power shovels,
Another object of the present invention is to provide a buried marker sheet which can prevent the excavating machine from digging down and prevent the buried object from being damaged.

[0008]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a label made of a synthetic resin band-shaped sheet, and to print a sign on the surface thereof and to provide a fold and overlap portion at regular intervals in the length direction. In the embedded marker sheet, a band-shaped sheet made of an appropriate material and having a predetermined breaking strength is attached to the back surface thereof, and the attachment is such that the embedded marker sheet is easily separated when pulled with a predetermined force. A buried sign sheet characterized by the following.

In the above structure, a cushioning material made of an appropriate material may be further attached to the back surface of the attached belt-like sheet. Thus, when the buried marker sheet is pushed deeply by the excavating machine, the excavated body of the excavating machine does not strongly hit the buried object, so that it can be prevented from being damaged.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line II in FIG. 1, and FIG.
It is an enlarged view of middle A part.

In the drawing, reference numeral 1 denotes a synthetic resin band-like sheet,
On the surface "Water pipe attention""Below there is a water pipe attention,
Please seek witness. ”And the like, and at the same time in the length direction, fold and overlap portions 3,
This is a buried sign sheet provided with 3, 3,.... The synthetic resin belt-like sheet is made by laminating low-density polyethylene and a woven fabric by lamination, and the material, the sign, the width, and the like are the same as those of the conventional one.

The folding and overlapping portions 3, 3, 3
, A heating needle (not shown) is inserted, and three layers are integrally welded along the inner periphery of the needle hole of the needle.
... is formed.

Reference numeral 5 denotes a band-shaped sheet made of an appropriate material and having a predetermined breaking strength and attached to the back surface of the buried marker sheet 1. In this embodiment, the same material as that of the buried marker sheet 1 is used, but its thickness is doubled.

Further, the band-shaped sheet 5 can be easily attached to the back surface of the buried marker sheet 1 when the buried marker sheet 1 is pulled with a predetermined force by an excavating body (not shown) of an excavating machine. It is about to be separated. For this reason, in the present embodiment, similarly to the folded and overlapped portion of the embedded marker sheet 1, the heating needle (not shown) is placed in a state where the portion other than the folded and overlapped portion of the embedded marker sheet 1 and the belt-shaped sheet 5 are overlapped. ) Is inserted, and these two layers are integrated by heat welding along the inner periphery of the needle hole of the needle. In addition, 6 is a welding part.

Thus, in the case of the present embodiment, even if the excavated body of the excavating machine hits the buried marker sheet 1 and pushes it down, the back surface of the buried marker sheet 1 has a band shape having a predetermined breaking strength. Since the sheet 5 is lined, the buried marker sheet 1 does not extend and expand. Therefore, breakage of the embedded marker sheet 1 can be prevented.

Further, since the buried marker sheet 1 and the belt-shaped sheet 5 are easily separated when a predetermined force is applied to the buried marker sheet 1, the buried marker sheet 1 is excavated by an excavating machine. Only this is pulled to the ground when it gets stuck.

Further, since the belt-like sheet 5 lined with the buried marker sheet 1 does not stretch and has a considerable breaking strength, the digging body of the digging machine is prevented from penetrating deeply, so that the digging body directly hits the buried object. Can be prevented.

Next, a second embodiment of the present invention shown in FIG. 4 will be described. The difference between the present embodiment and the first embodiment is that, in the present embodiment, the folded and overlapped portion of the buried marker sheet is not welded, and the whole of the buried marker sheet and the band-shaped sheet are stitched. is there. still,
Other configurations and operations are the same as those of the first embodiment, and therefore, the same members are denoted by the same reference numerals and detailed description thereof will be omitted. In FIG. 4, reference numeral 7 denotes a sewing thread.
In this embodiment, the number of sewing locations is one at the center in the width direction, but may be increased as appropriate.

Next, a third embodiment of the present invention shown in FIG. 5 will be described. The difference between the present embodiment and the first embodiment is that, in the present embodiment, the embedded marker sheet and the belt-shaped sheet are integrated by sewing without being welded to each other. is there.
Since other configurations and operations are the same as those of the first embodiment, the same members are denoted by the same reference numerals and detailed description is omitted. In FIG. 5, reference numeral 8 denotes a sewing thread. In this embodiment, two sewing positions are provided near both ends in the width direction in the present embodiment.
Alternatively, it may be reduced.

Next, a fourth embodiment of the present invention shown in FIG. 6 will be described. The difference between the present embodiment and the first embodiment is that, in the present embodiment, a buffer material made of an appropriate material is further attached to the back surface of the attached band-shaped sheet. Since other configurations are the same as those of the first embodiment, the same members are denoted by the same reference numerals, and detailed description is omitted. In FIG. 6, reference numeral 9 denotes a cushioning member made of a rubber sheet. In this embodiment, a rubber sheet is used, but foamed polyurethane or other appropriate material can be used.

Thus, in the case of this embodiment, the first
In addition to the operation of the embodiment, when the buried sign sheet is pushed deeply by the excavating machine, the excavated body of the excavating machine does not strongly hit the buried object and has an effect of preventing damage to the buried object. Things.

[0022]

Since the present invention has the above-described configuration and operation, when burying a buried object at a half depth of a conventional position and burying the buried object directly above the digging machine, the digging machine such as a power shovel or the like can be used. Therefore, it is possible to prevent breakage of the buried object by preventing the excavating machine from digging down without breaking.

In the case where a cushioning material is further attached to the back surface of the attached strip-shaped sheet, the excavated body of the excavating machine strongly hits the buried object when the buried marker sheet is pushed deeply by the excavating machine. That can prevent that.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line II in FIG.

FIG. 3 is an enlarged view of a portion A in FIG. 2;

FIG. 4 is a perspective view of a second embodiment of the present invention.

FIG. 5 is a perspective view of a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional side view of a fourth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 buried sign sheet 2 sign character 3 folded and overlapped part 4 welded part 5 belt-shaped sheet 6 welded part 7 sewing thread 9 cushioning material

Claims (2)

[Claims] 1. A buried marker sheet comprising a synthetic resin band-shaped sheet, on which a marker character is printed and a folding and overlapping portion is provided at equal intervals in a length direction,
A belt-shaped sheet made of an appropriate material and having a predetermined breaking strength is attached to the back surface thereof, and the attachment is such that the embedded marker sheet is easily separated when pulled with a predetermined force. Buried sign sheet. 2. The buried marker sheet according to claim 1, wherein a buffer material made of an appropriate material is further attached to the back surface of the attached band-shaped sheet.