JP3525293B2 - Buried sign sheet - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention 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] 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 work on the ground 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. SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is to be buried directly above a buried object when it is buried at a half depth of a conventional position. In the case, without breaking by excavator such as power shovel,
In addition, it is possible to prevent the digging machine from digging down and prevent the buried object from being damaged, and when the buried sign sheet is pushed deeply by the digging machine, the digging body of the digging machine hits the buried object strongly. An object of the present invention is to provide a buried sign sheet which can prevent such a situation. Accordingly, the gist of the present invention is to provide a label made of a synthetic resin band-like sheet, having a sign printed on the surface thereof, and having a fold-overlapping portion at equal intervals in the length direction. In the buried marker sheet provided, a band-shaped sheet made of an appropriate material and having a predetermined breaking strength is attached to the back surface, and the attachment is easily separated when the buried marker sheet is pulled by a predetermined force. A buried marker sheet characterized in that a buffer material made of an appropriate material is further attached to the back surface of the attached strip-shaped sheet. Further, as described above, a cushioning material made of an appropriate material is further attached to the back surface of the attached strip-shaped sheet. Therefore, when the embedded marker sheet is pushed deep by the excavating machine, the excavation of the excavating machine is performed. The body does not strongly hit the buried object, which can be prevented from being damaged. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a strip-shaped sheet is attached to the back surface of an embedded marker sheet, FIG. 2 is a cross-sectional view taken along the line II in FIG. 1, and FIG. 3 is an enlarged view of a portion A in FIG. 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. In such a case, 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 is lined with a band-shaped sheet 5 having a predetermined breaking strength. The buried sign sheet 1
Does not expand 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 modified example of the method of attaching the buried marker sheet and the belt-shaped sheet shown in FIG. 4 will be described. The difference between this embodiment and the embodiment shown in FIGS. 1 to 3 is that, in this 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 sewn. It is a point that did. Since other configurations and operations are the same as those of the example shown in FIGS. 1 to 3, the same members are denoted by the same reference numerals and detailed description is omitted. In FIG. 4, reference numeral 7 denotes a sewing thread. In this embodiment, the number of sewing positions is one at the center in the width direction, but may be increased as needed. Next, another modification of the method of attaching the buried marker sheet and the belt-like sheet shown in FIG. 5 will be described. The difference between this embodiment and the embodiment shown in FIGS. 1 to 3 is that, in this embodiment, the embedded marker sheet and the band-shaped sheet are integrated by sewing the entirety thereof without welding. It is a point. Since other configurations and operations are the same as those of the example shown in FIGS. 1 to 3, the same members are denoted by the same reference numerals and detailed description thereof will be omitted. In FIG. 5, reference numeral 8 denotes a sewing thread. In this example, the number of sewing positions is two in the vicinity of both ends in the width direction in this example, but may be further increased or decreased. FIG. 6 shows a configuration which is a feature of the present invention. The strip-shaped sheet 5 is attached to the back surface of the buried marker sheet 1 as described above, and On the back surface, a cushioning material 9 made of an appropriate material is further attached. In this embodiment, a rubber sheet is used as the cushioning material 9, but foamed polyurethane or other suitable material can be used. In the case of such a construction, in addition to the actions and effects in the examples shown in FIGS. 1 to 5, in addition to the fact that the buried sign sheet is It also has the function and effect that the body does not strongly hit the buried object and can be prevented from being damaged. Since the present invention has the above-described structure and operation, when a buried object is buried just above a half depth of a conventional buried object, a power shovel or the like is used. Without breaking by the excavating machine and preventing the excavating machine from digging down, thereby preventing damage to the buried object. Since a cushioning material such as a rubber sheet is further attached to the back surface of the attached belt-like 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. It can prevent that.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a state in which a band-shaped sheet is attached to the back surface of an embedded marker sheet 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 modified example of the method for attaching an embedded marker sheet and a belt-shaped sheet according to the present invention. FIG. 5 is a perspective view of another modification of the method of attaching the embedded marker sheet and the belt-shaped sheet according to the present invention. FIG. 6 is a vertical sectional side view of a main part showing a configuration which is a feature of the present invention. [Description of Signs] 1 Embedded marker sheet 2 Marker character 3 Folding and overlapping part 4 Welding part 5 Band-shaped sheet 6 Welding part 7 Sewing thread 9 Buffer material

Claims (1)

(57) [Claim 1] A buried marker sheet made of a synthetic resin band-shaped sheet, on which the sign characters are printed and provided with folding and overlapping portions at equal intervals in the length direction,
A band-shaped sheet made of an appropriate material and having a predetermined breaking strength is attached to the back surface, and the attachment is such that the embedded marker sheet is easily separated when pulled by a predetermined force. A buried marker sheet characterized in that a buffer material made of an appropriate material is attached to the back surface of the sheet.