JP3303161B2 - Laser cutting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser cutting method for efficiently laying laying pipes for sewage systems and dark spots.

[0002]

2. Description of the Related Art Conventionally, when laying laying pipes for sewers and dark spots, a road surface to be laid is subjected to a predetermined excavation with a backhoe or the like, and then the excavated portion is sunk with a wooden sheet pile, and a water thread is used. Construction is performed by centering the laid pipes.

[0003] By the way, in the above-mentioned conventional method of laying pipes in the cut and cut portion, usually 10 m to 30 m is 1 m.
After excavating as a span, do soil retention with a wooden sheet pile,
It has been the mainstream to set the laid pipes at the excavated portion by means of rail-type trenches and to lay the laid pipes while guiding them using water threads.

[0004] The procedure is as follows: first, a heavy machine such as a backhoe is used to excavate a distance of about 10 m to 30 m, then a manhole cylinder for connecting laying pipes is inserted into a predetermined position on the road, and then a stake is drawn out. Has been adopted by nailing on the pipe diameter with a pipe core and setting the height with a pipe core device placed in the center. A predetermined number of laying pipes of about 2 to 4 m are arranged and laid while measuring the height and the gradient in the length direction by level and transit,
At that time, the excavated soil had to be discarded by means of transportation such as dump trucks. The earth and sand for backfilling are then transported to the rear of the excavated portion by a dump truck to backfill the laid pipes.

[0005] However, in the above-mentioned conventional example, when laying pipes, the height and the gradient in the longitudinal direction must be checked by level and transit each time. With the occupied for a long time, heavy equipment such as backhoes and dump trucks must be sequentially moved for excavation work, treatment of generated soil, backfilling, etc.

[0006] Further, when constructing a predetermined length, it is necessary to perform staking a predetermined number of times according to the number of laying pipes to be laid, which is very troublesome.

As described above, the laying work of laying pipes for sewage requires a long excavation extension, and requires transport of generated soil and backfill soil, which requires site management, safety,
Problems have emerged in the traffic aspect. Therefore, by making it possible to construct these laying pipes in a short period of time, reducing the workforce and shortening the construction period, etc., will help to increase the penetration rate by laying long sewers at low unit prices in Japan. It is considered something.

Accordingly, the present inventor has disclosed in Japanese Patent Application No. 3-80812.
No. (Japanese Examined Patent Publication No. 8-231141), a road is cut by a digging machine at a distance corresponding to the length of one laying pipe on the road surface, and the length of one laying pipe is laid on the cut portion. Laying laying pipes by laying ground, digging work is performed while irradiating the slope etc. with the laser irradiation mechanism installed along the laying pipes, and repeating the process of backfilling the cut off part with the above cutting machine sequentially A laser cutting method was developed.

That is, as shown in FIG. 4, in the above-described road surface excavation method, a distance corresponding to the length of one of the pipes 102 to be laid on the road surface 101 is cut by a cutting machine such as a backhoe 103, and the road is laid on the cut portion. After laying the soil for one length of the pipes 102 by using the trench 104 or the like, laying the laid pipes 102, and irradiating the gradient or the like by the laser irradiation mechanism 105 installed along the laid pipes 102. The step of performing a digging operation and backfilling the digged portion with the above-mentioned digging machine is sequentially repeated.

[0010]

According to the above-mentioned invention, the length of digging work in laying pipes can be shortened,
It is very convenient in terms of site management, safety, traffic problems, etc. It is rapidly spreading because it can be constructed in a short time.

However, it has been found that the above-mentioned invention has the following problems. That is, when the diameter of the manhole 106 is large as shown in FIG. 5, the laser irradiation mechanism 105 can be taken out of the laid pipes 102 through the manhole 106 without any problem after the completion of the construction. On the other hand, when the diameter of the manhole 106 is small as shown in FIG. 6, the laser irradiation mechanism 105 cannot be removed from the manhole 106 after the completion of the construction. Incidentally, with the spread of sewerage to households, the construction site extends from the main road to the side road, and the number of cases where the diameter of the manhole 106 decreases accordingly increases.

The present invention solves the above-mentioned drawbacks of the conventional example. Even when the diameter of the manhole is small, the laser irradiation mechanism can be recovered from the manhole without any problem after the completion of the construction, and the laser irradiation mechanism can be installed in the laid pipes. An object of the present invention is to provide a laser digging method that can easily perform fine adjustment of installation, irradiation angle, and the like.

[0013]

That is, according to the laser cutting method of the present invention, a distance corresponding to the length of one pipe laid on a road surface is cut by a digging machine, and one laid pipe is cut on the cut portion. Laying the laying pipes by laying the soil for the length, performing the digging work while irradiating the slope etc. with the laser irradiation mechanism installed along the laying pipes, and backfilling the digging part with the above digging machine In a laser cutting method that is sequentially repeated, at least a laser irradiation portion is separated from a laser irradiation mechanism, and only the separated laser irradiation portion is installed in a laid pipe.

The laser cutting method according to the present invention is characterized in that the laser irradiating section is remotely operated by wire or wirelessly.

The laser cutting method according to the present invention is characterized in that the laser irradiation section is fixed in a pipe by an airbag.

The laser cutting method according to the present invention is characterized in that the laser irradiation section is fixed in a pipe by a telescopic arm.

The laser cutting method according to the present invention is characterized in that the laser irradiating section is fixed in a pipe by a telescopic caster.

Since the laser cutting method according to the present invention is configured as described above, even when the diameter of the manhole is small, the laser irradiation mechanism can be recovered from the manhole without any problem after the completion of the construction.

According to the laser cutting method of the present invention,
Vehicles whose laser irradiation position passes on roads can be easily installed in laying pipes, fine adjustment of irradiation angle, etc., and the laser irradiation unit can be remotely controlled on the ground etc. In the case of deviation due to vibration or the like, fine adjustment of the irradiation angle and the like can be performed easily and quickly in other cases.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the laser cutting method according to the present invention will be described below in detail with reference to the drawings.

That is, as shown in FIG.
Starting from 06, a distance corresponding to the length of one of the laid pipes 102 on the road surface 101 is cut by a cutting machine such as a backhoe 103. The laying pipes 102 are usually made of a PVC pipe or other materials. Then, on the side wall of the cut-out portion, a soil for one length of the laying pipes 102 is provided, preferably by a box-shaped trench 104 or the like, and then the laying pipes 102 are laid. The box-shaped trench 104 is formed by connecting a pair of side plates with a plurality of connecting arms, and laying pipes 102 between the connecting arms.
It can pass through.

After the laying pipes 102 are laid, the cutting work is performed while irradiating a gradient or the like with the laser irradiation mechanism 105 installed along the laying pipes 102. In this way, the distance for the next one of the laid pipes 102 is cut out, and immediately after the laid pipes 102 have been buried, backfilling is performed. At this time, the generated soil is transported by the dump truck 107, but can be almost backfilled by the backhoe 103.

At the time of laying the laying pipes 102, the box-shaped trench 104 having the backhoe 103 mounted thereon is advanced on the cut-off portion, and the 3-meter laid pipes 102 held by the box-shaped trench 104 are cut into the cut-out portion. It is laid by sinking.

The gradient of the laid pipes 102 is measured by a laser irradiation mechanism 105 installed in the laid pipes 102. This laser irradiation mechanism 105 is used for laying pipes 1
It is not necessary to move the installation location every 02, and once installed, the gradient of a predetermined length (for many pipes) can be measured at the same position.

When using the laser irradiation mechanism 105, it is desirable to use a target formed on the end face of the laid pipes 102. For example, laying pipes 102
A transparent film on which a target indicating a tube core is printed is attached to the end face of the laser irradiation mechanism 105 so that the aiming of the laser irradiation mechanism 105 can be prevented, and water or mud is prevented from flowing into the end face. At least four grooves are formed, and these grooves are positioned on a line passing through the pipe core. A water thread or a straight scale is inserted into this groove so that the laser irradiation mechanism 105 can be aimed, or the end face of the laid pipes 102 can be formed. The purpose is to fit a target plate in which a target indicating a tube core is perforated. Then, a target is formed on the end face of the laid pipes 102 by any of the above means, and the gradient of the laid pipes 102 is measured while aiming at the laser irradiation mechanism 105.

After the installation of the laying pipes 102 is completed, the cut portion is back-filled by a cutting machine such as the backhoe 103. This backfilling is performed immediately after the installation of one laying pipe 102 is completed. It is an indispensable condition for promptly performing the construction that the cutting of one laying pipe 102, the installation of the laying pipe 102, the measurement of the gradient, and the backfilling are sequentially repeated.

The laser beam emitted from the laser irradiation mechanism 105 keeps illuminating the cut portion where the cut operation is being performed. Can proceed. As a matter of course, this laser beam is even more effective in nighttime cutting work.

In the laser cutting method, in the present invention, at least the laser irradiating section is separated from the laser irradiating mechanism 105, and only the separated laser irradiating section is laid on the pipes 10 or the like.
2 is provided.

That is, as in the example of FIG. 1, the main body of the laser irradiation mechanism 105 is installed on the road 111. In the laying pipes 102 buried on the road surface 101, a laser irradiation unit 112 separated from the laser irradiation mechanism 105 is provided.
Are introduced through the manhole 106. The laser irradiator 112 is surrounded by an airbag 113, and the airbag 113 is filled with air so as to be in close contact with the inner wall of the laid pipes 102 and held. The airbag 113 is preferably divided into a plurality of sections, and the angle and the like of the laser irradiation section 112 can be finely adjusted by adjusting the amount of air charged into each section.

The laser irradiation mechanism 105 includes various control devices for the laser irradiation unit 112 including a CPU and the like,
Devices for remote control, and compressors, air cylinders, and other control devices for adjusting the angle of the laser irradiation unit 112 by the airbag 113 are built in.

The laser irradiating section 112 can have a compact structure in which a laser emission source lamp and a laser irradiating head are built in. However, the laser irradiating section 112 can be controlled within a size that can be taken out from the manhole 106. Some of the devices, control devices for the airbag 113, or some of them may be incorporated.

In the example of FIG. 2, the laser irradiation mechanism 10
A plurality of telescopic arms 114 are attached to the periphery of the laser irradiation unit 112 separated from 5. The X-leg 115 of the telescopic arm 114 is driven by a motor or the like to expand and contract, so that the pressing plate 116 attached to the end is brought into close contact with the inner wall of the laying pipes 102 and is held. The telescopic arm 114 can not only adjust the laser irradiation unit 112 to the tube core position in the laid pipes 102 but also finely adjust the angle of the laser irradiation direction and the like.

In the example of FIG. 3, the laser irradiation mechanism 10
A plurality of telescopic casters 117 are attached to the lower part of the laser irradiation section 112 separated from the section 5. The telescopic caster 117 is driven by a motor or the like to expand and contract, so that the laser irradiation unit 112 is not only adjusted to the core position in the laid pipes 102, but also the angle of the laser irradiation direction is finely adjusted. You can do it. The laser irradiating unit 112 is configured such that the telescopic casters 117 can be freely rotated in the inner circumferential direction of the laid pipes 102 and the laser is irradiated in the vertical direction as well. It can be easily determined whether or not the laser is correctly irradiated along the line.

In the present invention, at least the laser irradiating section is separated from the laser irradiating mechanism 105 and only the separated laser irradiating section 112 is installed in the laying pipes 102. Therefore, even if the diameter of the manhole 106 is small, the construction can be performed. After the end, the laser irradiation mechanism 105 can be collected from the manhole 106 without any problem.

Further, since the laser irradiation unit 112 can be remotely controlled on the main body of the laser irradiation mechanism 105, the laser irradiation unit 112 can be installed in the laying pipes 102, and the irradiation angle of the laser irradiation unit 112 can be controlled. Adjustment can be easily performed on the road, and fine adjustment of the irradiation height, irradiation angle, and the like can be performed even when the laser irradiation unit 112 is displaced due to vibration of a vehicle passing on the road or the like. Simple and quick.

[0036]

According to the laser cutting method of the present invention constructed as described above, even if the diameter of the manhole is small, the laser irradiation mechanism can be recovered from the manhole without any problem after the completion of the construction.

According to the laser cutting method of the present invention,
By enabling remote control of the laser irradiation unit on the laser irradiation mechanism body side, it is possible to easily install the laser irradiation unit in the laid pipes, fine-tune the irradiation angle of the laser irradiation unit, etc. on the road In addition, even when the laser irradiation unit is displaced due to vibration of a vehicle traveling on a road or the like, and in other cases, fine adjustment of the irradiation height, irradiation angle, and the like can be performed easily and quickly. Was.

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part showing an embodiment of a laser cutting method according to the present invention.

FIG. 2 is a schematic diagram of a main part showing another embodiment.

FIG. 3 is a schematic view of a main part showing another embodiment.

FIG. 4 is a schematic view showing the entire configuration of a laser cutting method according to the present invention.

FIG. 5 is a schematic view of a main part showing a conventional laser cutting method.

FIG. 6 is a schematic diagram of a main part showing a case where a manhole has a small diameter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Road surface 102 Laying pipes 103 Backhoe 104 Box type trench 105 Laser irradiation mechanism 106 Manhole 107 Dump truck 111 On the road 112 Laser irradiation part 113 Airbag 114 Telescopic arm 115 X leg 116 Press plate 117 Telescopic caster

Claims (5)

(57) [Claims] 1. A digging machine cuts a distance corresponding to the length of one laying pipe on a road surface, and lays a laying pipe by digging a ground for one length of the laying pipe on the cut portion. In the laser cutting method in which the cutting work is performed while irradiating by a laser irradiation mechanism installed along the laying pipes such as slopes, and the step of backfilling the cut portion with the above cutting machine is sequentially repeated, A laser cutting method wherein at least a laser irradiation part is separated and only the separated laser irradiation part is installed in a laid pipe or the like. 2. The laser cutting method according to claim 1, wherein the laser irradiation unit is remotely operated by wire or wirelessly. 3. The laser cutting method according to claim 1, wherein the laser irradiation section is fixed in the pipeline by an airbag. 4. The laser drilling method according to claim 1, wherein the laser irradiation section is fixed in the pipeline by a telescopic arm. 5. The laser cutting method according to claim 1, wherein the laser irradiation section is fixed in the pipeline by a telescopic caster.