JPH0684087U - Ribbed tube - Google Patents

Abstract

(57) [Summary] [Structure] Mark lines 16 extending in the direction parallel to the tube axis are formed on the tip surfaces (outer peripheral surfaces) of the plurality of circumferential ribs 14. [Effect] The marking line 16 is hardly hidden by the earth and sand,
Even if the marked line 16 is covered with earth and sand, since the earth and sand can be wiped away in the pipe axis direction, the marked line 16 can be easily exposed and workability can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ribbed pipe, and more particularly to a ribbed pipe used in, for example, a sewer pipe buried underground.

[0002]

[Prior art]

 In conventional ribbed pipes, for example, an inkjet printer or the like is used to form a marked line for leveling between the outer surfaces of the main pipe, that is, between the ribs.

[0003]

[Problems to be solved by the device]

 If the marked line cannot be seen due to the adhered sediment on the ribbed pipe, it is necessary to remove the sediment during the leveling work to expose the marked line. However, in the conventional ribbed pipe in which a marked line is formed between the ribs, the ribs hinder the removal of soil and sand only in the circumferential direction, not in the pipe axis direction, resulting in poor workability. There was a problem. For example, in the case of one span of 40 to 50 m, it takes a very long time just to remove the soil for leveling.

Therefore, a main object of the present invention is to provide a ribbed tube capable of improving workability for leveling.

[0005]

[Means for Solving the Problems]

 This invention relates to a rib-equipped pipe including a main pipe and a plurality of circumferential ribs formed on the outer surface of the main pipe, wherein the end faces of the plurality of circumferential ribs extend parallel to the pipe axis of the main pipe. The ribbed tube is characterized in that

[0006]

[Action]

 Since the marked line is written on the tip surface of the rib, the marked line is rarely buried in the sediment during backfilling, and even if the marked line is hidden by the sediment, the adhered sediment is directed toward the pipe axis. It is possible to easily expose the marked line by removing it.

[0007]

[Effect of device]

 According to this invention, since the marked line can be easily exposed, the leveling operation can be speeded up. The above-mentioned objects, other objects, features and advantages of the present invention will be more apparent from the following detailed description of the embodiments with reference to the drawings.

[0008]

【Example】

 1 and 2, a ribbed pipe 10 of this embodiment includes a main pipe 12 having a substantially circular cross section, and a plurality of main pipes 12 are arranged on the outer surface of the main pipe 12 at predetermined intervals in the pipe axial direction. Circumferential ribs 14 are formed. Then, on the tip end surface (outer peripheral surface) of each circumferential rib 14, a marked line 16 extending in a direction parallel to the tube axis of the main tube 12 is formed by, for example, an ink jet. The marked line 16 may be formed as a groove or a protrusion.

Such a ribbed pipe 10 is laid in the ground as, for example, a sewer pipe line. When laying the ribbed pipe 10, first, for example, a sand foundation is formed at the bottom of the excavated laying groove, and the ribbed pipe 10 is placed on the sand foundation. Then, the leveling of the ribbed tube 10 is performed with reference to the marked line 16. At this time, if the sediment 16 adheres and the reference line 16 is no longer visible, the reference line 16 is exposed by wiping off the sediment with the hands or feet in the axial direction of the pipe. After completing the leveling, the laying groove is backfilled.

According to the present invention, even if the earth and sand adhere to the marking line 16, it can be removed in the axial direction of the pipe, so that the marking line 16 can be easily exposed and the leveling work can be performed. It is possible to speed up.

[Brief description of drawings]

FIG. 1 is an illustrative view showing one embodiment of the present invention.

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

[Explanation of symbols]

 10 ... tube with rib 12 ... main tube 14 ... rib 16 ... marked line

Claims (1)

[Scope of utility model registration request] 1. A ribbed pipe comprising a main pipe and a plurality of circumferential ribs formed on an outer surface of the main pipe, wherein tip ends of the plurality of circumferential ribs are parallel to a pipe axis of the main pipe. A ribbed tube, characterized in that it extends a marked line.