JP4704060B2 - Boundary display method and boundary indicator - Google Patents

Description

    The present invention relates to a boundary display method and a boundary indicator for a branch pipeline that branches an underground cable from a public pipeline and draws it into a residential area.

Conventionally, underground cables for power supply and communication have been branched from mains buried underground such as roads and sidewalks through hand holes and branch fittings, etc. It is inserted through the protection tube and drawn into the residential area.
When laying a pipeline that draws in this type of underground cable, private works will be done after government works are done.

In public works construction, a branch line is connected from the main to the boundary with the residential district, and a bag or cap is attached and sealed at the end of the branch line, and the branch line is buried. And in private construction, the end of the branch pipe buried in the government office construction is dug, the bag and the cap are removed, and the piping to the residential area is connected to the building.
In addition, the indicator which is attached to the underground burial pipe | tube for communication cables and displays the burial position of piping with a sign etc., and prevents pipe breakage at the time of road excavation etc. has already been disclosed (patent documents 1 and 2). reference).
Japanese Utility Model Publication No.59-126278 Japanese Utility Model Publication No. 63-28463

Conventionally, there is no method for accurately grasping the end position of the above-mentioned branch pipe, and when carrying out private construction, it has been searching while digging up several places of sand and sand depending on the intuition of the operator. For this reason, there was a problem that workability was not good.
In addition, the above-described conventional indicator only displays the piping position, and cannot display the piping work classification between the public works construction area and the private construction area.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a boundary display method and a boundary indicator capable of displaying the piping work division between the public works area and the private works area.

In order to achieve the above object, the invention according to claim 1 is to attach a branch pipe joint to a public pipe buried underground in a road or a sidewalk, and connect the branch pipe to the branch pipe joint. After connecting one end of the pipe joint to the end of this branch pipe at the boundary with, and attaching a lid to the other end side of this pipe joint, sealing the pipe line and conducting public works, Remove this lid, connect the lead-in pipe that is buried toward the building in the residential area to the other end of the pipe joint, perform civil work, branch the underground cable from the public pipe, Is a boundary display method that displays the boundary of the piping construction division between the government office construction and the private construction, and a bar is installed on the pipe joint, and a ground mark is provided at the upper end of the bar , As the boundary of the above plumbing classification is there.
In the invention according to claim 1 configured as described above, the public pipeline is buried along a road or a sidewalk, and an underground cable is laid in the pipeline. The underground cable referred to in the present invention is a power cable or a communication cable such as an optical fiber or a telephone line, and is branched from the public pipeline via a handhole or a free access pipe.

The branched underground cable is connected to the handhole, the free access pipe, and the like, and is inserted into a branch pipe buried toward the residential district.
The public pipeline referred to in the present invention may be a pipeline with high publicity, and is not limited to a pipeline of a public office, but may be a pipeline of a private company such as a communication industry.

  As described above, when a pipe joint is used, unlike the case where a mark is provided on the pipe itself, the mark can be reliably provided at a predetermined position. That is, when it is provided on a long pipe or the like, a degree of freedom is generated in the marker position, and it is left to the operator's judgment. On the other hand, when a marker is provided on the pipe joint as in the present invention, since the degree of freedom is hardly generated at the marker position, variations due to the operator are eliminated.

A bar having a length corresponding to the embedding depth of the pipe joint is erected on the pipe joint. Then, the marker provided at the upper end portion of the bar becomes visible on the ground surface.
In addition, although the ground mark is employ | adopted, the sign concerning this invention should just show the boundary of a piping construction division, and the sign embed | buried under the ground, the sign which protrudes on the ground, etc. may be sufficient as it. .

As an example of a mode in which the bar material is erected on the pipe joint, the invention according to claim 2 is the boundary display method according to claim 1, wherein the bar material stands on the top portion of the pipe joint. It is supposed to be established.
In the invention according to claim 2 configured as described above, when the bar is erected at the top portion of the pipe joint, the mark is disposed vertically above the top portion of the pipe joint. The Rukoto.
In addition, the height from the top portion of the pipe joint to the ground surface is measured in advance, and based on the measurement result, the bar is made to have a length corresponding to the embedment depth of the pipe joint. When the pipe joint is erected at the top of the pipe joint, the mark is reliably exposed on the ground surface without being embedded in embankment or the like.

As described above, the present invention is useful not only as a method but also as a boundary indicator used in this method. As an example thereof, the invention according to claim 3 is that a branch pipe joint is attached to a public pipe buried underground in a road or a sidewalk, and a branch pipe is connected to the branch pipe joint so that the boundary between the residential district image and the sidewalk At the end of the branch pipe, one end of the pipe joint is connected, and a lid is attached to the other end of the pipe joint, thereby sealing the pipe line and carrying out government work. When the private pipe is connected to the other end of the pipe joint and the underground cable is branched from the public pipe and drawn into the residential area. , A boundary indicator arranged at the boundary of the plumbing division between the public office construction and the private construction,
A bar with ground markings that display the boundary of the piping work section at the upper end part, and a cylindrical shape that is integrated from the wall surface of the pipe joint and protrudes outward, and can be erected by inserting the bar It is set as the structure which comprises this bar-stand standing part.

In the invention according to claim 3 configured as described above, the pipe joint has a cylindrical bar standing portion that is integrally projected from the wall surface and protrudes outward. The bar is inserted and installed on the installation portion. The top part of this bar is provided with a ground marking, and the pipe joint is connected to a branch pipe that branches the underground cable from the public pipe and draws it into the residential area, and the branch pipe is buried. Sometimes, the boundary of piping work classification is displayed on the ground surface.

Here, the bar may be inserted in advance at the time of factory shipment or may be inserted at a construction site. When inserting at a construction site, it is preferable in that the length of the bar can be adjusted according to the embedment depth of the pipe joint.
In addition, the insertion of the bar material referred to in the present invention is only required to attach the same bar material to the above-mentioned bar upright portion so that the bar material can be erected with respect to the pipe joint. The bar may be press-fitted into the bar standing part, or the bar may be inserted and bonded to the bar standing part, or may be screwed together using the mutual screw structure. It may be a thing.

As another example of the boundary indicator, the invention according to claim 4 attaches a branch pipe joint to a public pipe buried under the road or sidewalk, and connects the branch pipe joint to the branch pipe joint. One end of the pipe joint was connected to the end of this branch pipe at the boundary between the pipe and the sidewalk, and the lid was attached to the other end of the pipe joint, thereby sealing the pipe line and carrying out public works. Then, remove this lid, connect the lead-in pipe buried toward the building in the residential area to the other end of the pipe joint, perform civil work, branch off the underground cable from the public pipe, and When drawing into the compartment, a boundary indicator arranged at the boundary of the plumbing division between the government office construction and the private construction mentioned above, and a bar with a ground sign indicating the boundary of the plumbing division at the upper end part; , And can be erected by inserting the bar, It has a configuration comprising a fixture attached to the serial fitting.
In the invention concerning Claim 4 comprised as mentioned above, the said fixture is attached to the pipe joint connected to the branch pipeline which branches an underground cable from a public pipeline, and draws it in a residential area drawing. The bar is inserted and erected on the fixture. A ground mark is provided at the upper end portion of the bar, and when the pipe joint is buried, the boundary of the piping work division is displayed on the ground surface.

As an example of the standing state of the bar in the boundary indicator, the invention according to claim 5 is the boundary indicator according to claim 3 or claim 4, wherein the bar is the pipe joint. It is set as the structure standing at a pipe top site | part. That is, it becomes a useful structure like the said Claim 2.
As an example of the bar structure in the boundary indicator, the invention according to claim 6 is the boundary indicator according to any one of claims 3 to 5, wherein the bar has an upper end portion having a rectangular cross section. In addition, the lower end side has a circular cross section.
In the invention according to claim 6 configured as described above, the upper end portion has a rectangular cross section to ensure a wide marking surface, and the lower end side has a circular cross section to reduce the cutting area. Then, when adjusting the length of the bar, the cutting work of the bar becomes easy.

As described above, the present invention can provide a boundary display method capable of displaying the piping construction division between the public works construction area and the private construction area.
In addition, it is possible to reliably display the piping work classification without variation.
Further, it is possible to provide a boundary display method in which the display of the piping work division can be easily visually confirmed.

Furthermore, according to the invention concerning Claim 2 or Claim 5, while being able to display the position of a branch pipe line reliably, a piping construction division can be reliably displayed on the ground surface.
Furthermore, according to the invention concerning Claim 3 or Claim 4, the boundary indicator which can display the piping construction division of a government office construction area and a private construction area can be provided.
Furthermore, according to the invention concerning Claim 6, the construction work of a boundary indicator can be made efficient.

Here, embodiments of the present invention will be described in the following order.
(1) Laying structure of underground cable:
(2) Explanation of pipeline construction procedure and boundary indicator:
(3) Other boundary indicators:
(4) Summary:

(1) Laying structure of underground cable:
FIG. 1 schematically shows an underground cable laying structure according to an embodiment of the present invention.
In the figure, a sidewalk B is provided on the side edge of the road A, and a private residential district image C is formed adjacent to the sidewalk B. In the present embodiment, the sidewalk B is interposed between the road A and the residential district image C, but the present invention can also be applied when the sidewalk B is not provided.
A public pipeline 10 is embedded in the basement of the road A in parallel with the road A, and an underground cable is inserted into the public pipeline 10. The public pipeline 10 here is a pipeline called a so-called main pipeline or main pipeline.

A branch pipe joint 20 is provided in the public pipeline 10 at a predetermined interval. As shown in FIG. 2, the branch pipe 30 is embedded to the vicinity of the boundary between the residential area picture C and the sidewalk B through the branch pipe joint 20, and the end portion of the branch pipe 30, that is, the residential area picture C and the sidewalk. One end of the pipe joint 40 is connected to the boundary with B.
In this sense, the branch pipe 30 and the pipe joint 40 constitute a branch pipe referred to in the present invention. In addition, a lead-in pipe 50 is connected to the other end side of the pipe joint 40 toward the building in the residential area drawing C.

Here, a branch cable branched from the public pipeline 10 is inserted into the branch pipe 30, and the branch cable is drawn toward the building in the residential district image C via the pipe joint 40 and the lead-in pipe 50.
In the present embodiment, the pipeline is branched through the branch pipe joint, but the scope of application of the present invention is not limited by the branch structure, and can be similarly applied to the case of branching through the hand hole.

(2) Explanation of pipeline construction procedure and boundary indicator:
The pipe drawing work to the residential area picture C is divided into public works and private works. That is, the public pipe 10 and the branch pipe 30 buried under the road A and the sidewalk B are constructed as public works, and then the connection and burial of the lead-in pipe 50 in the residential area C are constructed as private works. .
In the public works, the branch pipe joint 20 is attached to the public pipeline 10 and the branch pipe 30 is connected to the branch pipe joint 20. Further, one end of the pipe joint 40 is bonded and connected to the end of the branch pipe 30 at the boundary between the residential area picture C and the sidewalk B.
Further, as shown in FIG. 3, a lid 40a is attached to the other end side of the pipe joint 40 to seal the pipe line, thereby preventing earth and sand or rainwater from entering the pipe line.

4-7 has shown the structure of the pipe joint 40 concerning this embodiment.
As shown in these drawings, a cylindrical marker bar standing portion 41 is projected vertically upward on the top of the pipe at the central portion of the pipe joint 40. As shown in FIG. Here, the marker bar standing part 41 constitutes a bar material standing part according to the present invention, and the marker bar 60 constitutes a bar material according to the present invention.

FIG. 8 shows a configuration of the marker bar 60 according to the present embodiment.
In the figure, the sign bar 60 has a circular shape on the left side of about 3/4 and a rectangular shape on the right side of about 1/4. In addition, a ground mark 61 such as “communication” or “pipe →” is provided on the right end surface of the sign bar 60.
The marker rod 60 having such a configuration is erected so that the left side in the drawing is press-fitted into the marker rod standing portion 41 of the pipe joint 40 and the marker portion is oriented vertically upward.

  At this time, the construction worker measures the dimension from the top of the pipe joint 40 to the ground surface position (GL shown in FIG. 3), and the length of the marker rod 60 is equal to this dimension. The left end side of the marker bar 60 in FIG. 8 is cut out and attached to the marker bar standing portion 41 of the pipe joint 40. Here, since the cross-sectional area is reduced by making the cutting portion of the marker rod 60 into a circular cross section, the cutting operation is facilitated.

Here, the reason why the length of the marker rod 60 is adjusted is that the ground marker 61 provided at the upper end portion of the marker rod 60 is embanked even when the embedding depth of the branch pipe 30 is different from the predetermined value. This is to prevent the material from being buried by or protruding upward from the ground surface.
It is preferable to set the dimensions at the time of shipment so that the sign bar 60 can be cut out about 1/4 of the entire length and the remaining 3/4 can be used. For example, it is good to cut out about 200 mm of the labeling rod shipped at 800 mm and use 600 mm.

As described above, after the marker rod 60 is erected on the marker rod standing portion 41 of the pipe joint 40, the branch pipe 30 and the pipe joint 40 are backfilled to form the predetermined ground surface shown in FIG. Is completed. At this time, the ground marker 61 provided at the upper end portion of the marker rod 60 is exposed on the ground surface.
After that, private works will be carried out on the residential area painting side. The construction worker looks for the ground surface sign 61 indicating the public-private boundary position, and confirms that the pipe joint 40 is buried vertically below the ground surface sign 61. In the present embodiment, since the cross section of the ground mark 61 is rectangular and a large display area is secured, the confirmation work is easy.

Then, the construction worker digs up the mark position to expose the pipe joint 40, removes the cover 40a, and inserts the pipe end of the lead-in pipe 50 embedded in the building into the receiving port of the pipe joint 40. Connecting. As shown in FIG. 6, the pipe joint 40 is provided with a rubber ring 42 on the inner wall of the receiving port on the side to which the lead-in pipe 50 is connected, and a sealing property between the pipe joint 40 and the lead-in pipe 50 is ensured. .
After that, the construction worker backfills the piping and completes the private construction as shown in FIG. At this time, after removing the marker rod 60 from the pipe joint 40, the pipe may be backfilled.

(3) Other boundary indicators:
9 to 14 show a pipe joint having another configuration.
In the pipe joint 40 of the above-described embodiment, as shown in FIGS. 4 to 6, a portion having a small diameter is provided between the outlet of the branch pipe 30 and the inlet of the lead-in pipe 50, and this small diameter portion Although the marker bar standing part 41 is provided on the outer wall of 43, the marker bar standing part may be provided without providing the small-diameter part as shown in FIGS. That is, the marker rod 60 may be erected above the top of the branch pipe 30 or the lead-in pipe 50. With this configuration, it is possible to save space in the pipe length direction of the pipe joint.

From the same viewpoint, a pipe joint in which a rubber ring receiving port and a differential port are combined may be employed. Moreover, as shown in FIG. 11 and FIG. 12, a receiving port for inserting and connecting a corrugated pipe having a sealing material attached to the outer periphery on the front end side, and a differential port for inserting and connecting to a receiving pipe of a PVC pipe A combined pipe joint may be employed.
Further, as shown in FIG. 13, a pipe joint in which a marker rod 60 is erected above the abutting position of the branch pipe 30 and the drawing pipe 50 may be used. As shown in FIG. It is also possible to use a pipe joint in which a corrugated pipe fitted with a sealing material is inserted on both sides and connected to both sides, and a marker rod 60 is erected on the small diameter part in the center.

FIG. 15 is a side view showing an external appearance when the pipe joint and the attachment of the marker bar 60 are separated. In the figure, a cylindrical fixture 70 having a marker bar standing portion 71 projecting outward is adopted, and a general-purpose pipe joint having no marker bar standing portion is press-fitted into the fixture 70.
The inner diameter of the fixture 70 is set in accordance with the outer diameter standard of general-purpose pipe fittings, and can be used regardless of the type of pipe fitting. Note that the mounting tool 70 is not limited to one in which the pipe joint can be inserted and the marker rod 60 can be erected, and is not limited to one that press-fits the pipe joint, and may be one that is adhesively fixed after insertion.

FIG. 16 is a plan view showing a marker bar 80 having another configuration.
In the figure, the left end portion is a mounting section 81 having a circular cross section, and the other right side portion is a rectangular cross section. The length of the attachment portion 81 is substantially the same as the insertion length into the marker rod standing portion 41. When the marker rod 80 is standing, the attachment portion 81 is accommodated in the marker rod standing portion 41.
In addition, when it is necessary to adjust the length of the marker rod 80, it is possible to cut and use a portion having a rectangular cross-section by a desired length. Also good.

(4) Summary:
In this way, when the underground government office construction is performed at the public-private boundary position, the pipe joint 40 is connected to the end of the branch pipe 30 and the sign bar 60 having a predetermined length is erected on the sign bar standing portion 41 of the pipe joint 40. After installation, the pipe joint 40 is backfilled. As a result, the ground surface marker 61 provided at the upper end portion of the marker bar 60 is exposed on the ground surface. For this reason, when the private construction is subsequently performed on the residential area drawing side, the construction worker can easily confirm the ground surface sign 61 and grasp the public-private boundary position where the pipe joint 40 is buried.

It is the schematic which shows the laying structure of the underground cable concerning one Embodiment of this invention. It is the schematic which shows the buried pipe path | route after construction completion. It is the schematic which shows the buried pipe route after completing government office construction. It is a front view which shows the structure of the pipe joint concerning this embodiment. It is a top view which shows the structure of the pipe joint concerning this embodiment. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a front view which shows the structure of the label stick | rod concerning this embodiment. It is a front view which shows the pipe joint which has a structure different from this embodiment. It is CC sectional drawing of FIG. It is a front view which shows the pipe joint which has a structure different from this embodiment. It is DD sectional drawing of FIG. It is sectional drawing which shows the pipe joint which has a structure different from this embodiment. It is sectional drawing which shows the pipe joint which has a structure different from this embodiment. It is a side view which shows the external appearance of the pipe joint at the time of making the attachment tool of a label | marker rod into a different body. It is a top view which shows the marker stick | rod which has a structure different from this embodiment.

30 Branch pipe 40 Pipe joint 41 Marking bar standing part 50 Pull-in pipe 60 Marking bar 61 Ground mark

Claims (6)

Attach a branch pipe joint to a public pipe buried underground on a road or sidewalk, connect a branch pipe to this branch pipe joint, and connect the pipe joint to the end of this branch pipe at the boundary between the residential area and the sidewalk. By connecting one end and attaching a lid to the other end of this pipe joint, after sealing the pipeline and carrying out government work, remove this lid and embed it toward the building in the residential area To connect the other pipe to the other end of the pipe joint, perform civil works, branch the underground cable from the public pipe, and draw it into the residential area. A boundary display method for displaying the boundary of
A boundary display method characterized in that a bar material is erected on the pipe joint, a ground mark is provided at an upper end portion of the bar material, and a boundary of the piping work section is displayed.       The boundary display method according to claim 1, wherein the bar is erected at a top portion of the pipe joint. Attach a branch pipe joint to a public pipe buried underground on a road or sidewalk, connect a branch pipe to this branch pipe joint, and connect the pipe joint to the end of this branch pipe at the boundary between the residential area and the sidewalk. By connecting one end and attaching a lid to the other end of this pipe joint, after sealing the pipeline and carrying out government work, remove this lid and embed it toward the building in the residential area To connect the other pipe to the other end of the pipe joint, perform civil works, branch the underground cable from the public pipe, and draw it into the residential area. A boundary indicator disposed at the boundary of
A bar with a ground sign that displays the boundary of the piping work classification at the upper end part,
A boundary indicator, comprising: a cylindrical bar standing portion integrally formed from a wall surface of the pipe joint and projecting outward and capable of being erected by inserting the bar. Attach a branch pipe joint to a public pipe buried underground on a road or sidewalk, connect a branch pipe to this branch pipe joint, and connect the pipe joint to the end of this branch pipe at the boundary between the residential area and the sidewalk. By connecting one end and attaching a lid to the other end of this pipe joint, after sealing the pipeline and carrying out government work, remove this lid and embed it toward the building in the residential area To connect the other pipe to the other end of the pipe joint, perform civil works, branch the underground cable from the public pipe, and draw it into the residential area. A boundary indicator disposed at the boundary of
A bar with a ground sign that displays the boundary of the piping work classification at the upper end part,
A boundary indicator that is capable of being erected by inserting the bar, and having a fixture attached to the pipe joint.     The boundary indicator according to any one of claims 3 and 4, wherein the bar is erected at a pipe top portion of the pipe joint.     The boundary indicator according to any one of claims 3 to 5, wherein the bar has an upper end portion having a rectangular cross section and a lower end side having a circular cross section.

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