JP6482711B1 - Centering / joining method of fluid pipe buried in ground and centering / joining apparatus used therefor - Google Patents

Abstract

Provided is a buried fluid pipe centering method and a centering device used therefor, which can easily perform the centering operation even for a fluid pipe buried in the ground.
A step of attaching a rotary drive device 4 to one end of a fluid pipe 2 and holding the rotary drive device 4 so as to be movable in a direction perpendicular to the pipe axis direction of the fluid pipe 2; At least the other end of the fluid pipe 2 is movable and rotatable in a direction orthogonal to the pipe axis direction of the fluid pipe 2, and the fluid pipe 2 buried in the ground is rotated by the rotary drive device 4 to excavate. The step of stirring the ground around the fluid pipe 2 by the functional unit 3 and moving the fluid pipe in a direction orthogonal to the pipe axis direction make the fluid pipe 2 buried in the ground first in the ground. And a step of aligning the cores.
[Selection] Figure 1

Description

  The present invention relates to a method for centering a fluid pipe buried in the ground and a centering device used therefor.

  When connecting the ends of the fluid pipes, it is important to align the fluid pipes. As a general method for embedding a fluid pipe in the ground, after excavating a work shaft for burying a fluid pipe in the ground extensively, an operator enters the work shaft and introduces a plurality of fluid tubes. After connecting the ends of each other, the work pipe is backfilled to embed the fluid pipe in the ground. In this case, the fluid pipes are centered before the work shaft is backfilled, and the fluid pipes can be freely moved in the vertical and horizontal directions, so that the centering work between the fluid pipes can be easily performed. .

  However, in such a fluid pipe embedding method, centering work is easy, but on the other hand, large-scale excavation work for excavating a work shaft longer than the length of the fluid pipe or earth retaining of the work shaft is required. Since it is necessary to perform the work of introducing the fluid pipe and the work of backfilling the work shaft after the work is performed, there is a problem that a long work time is required and the work efficiency is poor.

  In order to solve such a problem, the applicant of the present application has a projecting excavation function portion on the outer peripheral surface, and rotates the fluid pipe held substantially horizontal with respect to the ground by a rotary drive device. An introduction device and a burying method for introducing a fluid pipe into the ground while excavating the ground by the excavation function unit while moving it downward are already patented (see Patent Document 1).

Japanese Patent No. 5647292 (second page, FIG. 5, FIG. 6)

  However, when the fluid pipe is buried in the ground by the introduction device and the burying method described in Patent Document 1, the buried fluid pipe receives the strong restraining force of the ground and can be easily moved in the vertical and horizontal directions by human power. Therefore, it is difficult to align the fluid pipes after embedding, and it has been required to develop a new centering method and apparatus.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and even a fluid pipe buried in the ground can be easily centered, and the buried fluid pipe can be centered and the core used therefor. It is intended to provide a dispensing device.

In order to solve the above problems, the centering / joining method of the fluid pipe embedded in the ground of the present invention is:
A projecting excavation function part is provided on the outer peripheral surface, and the fluid pipe held substantially horizontal to the ground is moved downward toward the ground while rotating. The excavation function part excavates the ground while excavating the ground. A method for centering and joining fluid pipes embedded in
At one end of the fluid pipe , a rotation driving device and an axial direction moving means for moving the fluid pipe in the tube axis direction are mounted, and the rotation driving device is attached to the fluid pipe in the tube axis direction by a first holding body. And can be moved in a direction perpendicular to the tube axis direction .
A step of holding at least the other end of the fluid pipe in a tube axis direction of the fluid pipe by a second holding body , movable in a direction orthogonal to the tube axis direction , and rotatably.
Rotating the fluid pipe embedded in the ground by the rotation driving device, and stirring the ground around the fluid pipe by the excavation function unit;
By moving the fluid pipe in a direction orthogonal to the pipe axis direction, the fluid pipe is aligned with the fluid pipe previously embedded in the ground ,
With the first holding body and the second holding body holding the fluid pipe and the rotation driving device, the axial movement means moves the fluid pipe toward the fluid pipe previously embedded. Moving in the axial direction;
Joining the end of the fluid pipe and the fluid pipe buried previously;
It is characterized by having.
According to this feature, the ground around the fluid pipe is agitated and softened by the excavation function part on the outer peripheral surface of the fluid pipe by rotating the fluid pipe buried in the ground by the rotation driving device. After reducing the restraining force of the fluid pipe, both ends of the fluid pipe are moved in the vertical and horizontal directions perpendicular to the pipe axis direction so that the fluid pipes are aligned with each other, so even if the fluid pipe is buried in the ground The centering work can be performed efficiently.
Further, according to this feature, the centering work and the joining work between the fluid pipes can be continuously performed.
Further, according to this feature, after the centering operation is performed, the axial movement means can be operated to move the fluid pipe toward the previously introduced fluid pipe. The joining operation between the tubes can be performed continuously.

In the step of stirring the ground, the fluid pipe is moved in a direction orthogonal to the pipe axis direction while rotating.
According to this feature, the ground around the fluid pipe can be agitated and softened extensively by the excavation function unit, and the range of movement of the fluid pipe in the vertical and horizontal directions can be increased. Can be dealt with even if there is a large misalignment.

A centering / joining device used for a centering / joining method of a fluid pipe buried in the ground,
A rotary drive device mounted on one end of the fluid pipe and rotating the fluid pipe;
An axial movement means connected to the rotary drive device for moving the fluid pipe in the pipe axis direction;
A first holding body that holds the rotation driving device so as to be movable in the direction of the pipe axis of the fluid pipe and to be movable in a direction perpendicular to the direction of the pipe axis ;
A second holding body that holds at least the other end of the fluid pipe in a direction of the pipe axis of the fluid pipe, is movable in a direction orthogonal to the pipe axis direction of the fluid pipe , and is rotatable. ,
First moving means for moving the first holding body in a direction orthogonal to the pipe axis direction of the fluid pipe;
Second moving means for moving the second holding body in a direction perpendicular to the tube axis direction of the fluid pipe;
It is characterized by having.
According to this feature, the fluid pipe buried in the ground is rotated by the rotation driving device, and the ground around the fluid pipe is stirred and softened by the protruding excavation function part on the outer peripheral surface of the fluid pipe, Since the restraint force of the fluid pipe by the ground is reduced, the first and second moving means move the first and second holding bodies and the fluid pipe held thereby by the vertical and horizontal directions, so that they are buried in the ground. Even if the fluid pipe is made, it can be easily moved in the vertical and horizontal directions to perform the centering operation efficiently.
Further, according to this feature, the centering work and the joining work between the fluid pipes can be continuously performed.
Further, according to this feature, after the centering operation is performed, the axial movement means can be operated to move the fluid pipe toward the previously introduced fluid pipe. The joining operation between the tubes can be performed continuously.

The first and second holding bodies each have a frame shape surrounding ends of the rotation driving device and the fluid pipe, and are assembled so as to be disassembled.
According to this feature, after performing the centering operation, the first and second holding bodies can be disassembled and easily removed.

A support roller for rotatably supporting the outer peripheral surface of the fluid pipe is provided on the inner surface of the second holding body.
According to this feature, the fluid pipe can be smoothly rotated without resistance.

The support roller is attached to the second holding body so that the fluid pipe can be guided in the pipe axis direction.
According to this feature, when the fluid pipe is moved in the pipe axis direction by the axial movement means, it is easily guided in the pipe axis direction without damaging the fluid pipe by being guided in the pipe axis direction by the support roller. Can be moved.

The second moving means has a guide roller that is movable in the vertical direction along the inner wall of the work shaft.
According to this feature, the first and second holding bodies can be smoothly moved up and down along the inner wall of the work shaft.

It is a perspective view of the state where the fluid pipe introducing device and the centering device according to the embodiment of the present invention are mounted on the fluid pipe. (A) is a top view which shows the sheet | seat member attached to the outer peripheral surface of a fluid pipe | tube, (b) is a side view similarly. It is a sectional side view which shows the process which fixes a sheet | seat member to a fluid pipe | tube. It is a side view which shows the modification of the fluid pipe | tube which has the excavation function part formed by adhering metal rib members along a pipe-axis direction. It is an enlarged side view which cuts and shows a part of rotation drive device and the 1st holding body with which the front end part of the fluid pipe was equipped. It is a longitudinal cross-sectional view in the VI-VI line of FIG. It is an enlarged vertical sectional view in the VII-VII line of FIG. It is a longitudinal cross-sectional view in the VIII-VIII line of FIG. (A)-(c) is a sectional side view which shows the procedure of the introduction process of a fluid pipe | tube. (A)-(e) is front sectional drawing which similarly shows the procedure of the introduction process of a fluid pipe | tube. (A)-(c) is a side view which shows the adjustment procedure in case the end surfaces of fluid pipes incline.

  EMBODIMENT OF THE INVENTION The form for implementing the centering method of the embedded fluid pipes which concerns on this invention, and the centering apparatus used therewith is demonstrated below based on an Example. In the following description, the right side of FIG. 1 and FIG. 9 is the front side (front side) of the centering device, the right side of FIG. 1 and FIG. 9 is the front side, and the left side is the rear side.

  A centering method for fluid pipes according to an embodiment and a centering device used therefor will be described with reference to the drawings. First, the fluid pipe introduction device will be described before describing the centering method and the centering device.

  Reference numeral 1 in FIG. 1 is a fluid pipe introduction device (hereinafter simply referred to as introduction device 1) used for efficiently introducing (embedding) the fluid pipe 2 into the ground. The introduction device 1 is mounted on a sheet member 3, 3 ′ provided along the tube axis direction of the fluid pipe 2, and one end portion (end portion on the front side) of the fluid pipe 2. Of the fluid pipe 2, the first holding body 5 that holds the rotation driving apparatus 4, and the outer peripheral surface of the other end (rear end) of the fluid pipe 2. A second holding body 6 that holds the fluid pipe 2 rotatably, and an advancing / retreating drive device 7 that moves the fluid pipe 2 forward and backward toward the ground while being held by the first and second holding bodies 5, 6, 7 is mainly composed. In addition, the rotation drive device 4, the 1st holding body 5, and the 2nd holding body 6 serve also as the structural member of the centering apparatus based on this invention so that it may mention later.

  As shown in FIGS. 1 and 2, the sheet members 3, 3 ′ include a plurality of sheet-like portions 3 a that cover the outer peripheral surface of the fluid pipe 2 and a plurality of protrusions that are scattered from the outer surface 3 c of the sheet-like portion 3 a. A provided blade portion 3b. The sheet members 3 and 3 'are spirally wound from the one end 2a and the other end 2b of the fluid pipe 2 toward the center so that the winding directions are opposite to each other. It functions as an excavation function part. Accordingly, the respective blade portions 3b, 3b,... Of the sheet member 3, 3 'are formed in a reverse spiral shape with a substantially central portion in the tube axis direction of the fluid tube 2 as a boundary.

  The excavation function unit refers to a portion provided along the tube axis direction of the fluid pipe 2 and having a function of excavating the ground, and the sheet members 3 and 3 ′, which are separate members from the fluid pipe 2, are wound around the fluid pipe 2. Thereby, the blade part 3b which is a protrusion which excavates the ground substantially is formed along the pipe axis direction of the fluid pipe 2. The excavation function unit is not limited to a separate sheet member, and a plurality of blades may be projected at the time of casting, for example. The blade portion is not limited to a plurality of protrusions, and may be formed continuously, for example.

  By applying an unillustrated adhesive or heat welding between the inner surface 3d (see FIGS. 2 and 3) of the sheet-like portion 3a and the outer peripheral surface of the fluid pipe 2, the sheet members 3 and 3 ′ are attached to the fluid pipe 2. It is fixed. In addition, the seat members 3 and 3 ′ are connected to each other by a fixing means (not shown) and integrated to improve the workability of attachment to the fluid pipe 2. However, the seat members 3 and 3 ′ may not necessarily be connected integrally. Good. In addition, it is preferable that the sheet-like portion 3a is formed of a synthetic resin or the like that is easily deformed, and the blade portion 3b is preferably formed of a hard synthetic resin or the like as compared with the sheet-like portion 3a. The material is not limited to this, and for example, the sheet-like portion may be formed of a highly flexible metal or the like, and the blade portion may be formed of a hard metal or the like having high wear durability.

  As shown in FIGS. 2 and 3, a groove 3e that opens toward the outer surface 3c and a ridge 3g that extends along the groove 3e are formed on one side of the sheet-like portion 3a. The other side portion of the sheet-like portion 3a is formed with a groove 3h that opens toward the inner surface 3d, and a ridge 3k that extends along the groove 3h. As shown in FIG. 3, when the sheet members 3 and 3 'are wound, the protrusions 3g and 3k are fitted into the adjacent grooves 3e and 3h, so that the sheet-like portion 3a is tubed. The strength of the excavation function part is increased by being connected in the axial direction.

  As shown in FIG. 2, each blade 3b, 3b,... Is disposed at a substantially central portion of the sheet-like portion 3a and spaced at regular intervals along the longitudinal direction. Each is provided with a tapered surface 3f. In addition, the blade portions 3b, 3b,... Are arranged at angles so that the tapered surface 3f is slightly inclined with respect to the sheet-like portion 3a in plan view. As a result, when the sheet members 3 and 3 ′ are wound around the fluid pipe 2, substantially the entire tapered surface 3 f of the blade portion 3 b faces the center direction of the fluid pipe 2 as shown in FIG. 3. .

  In addition to forming the excavation function part by spirally winding the sheet members 3 and 3 ′ having a plurality of blade parts 3b around the fluid pipe 2, as shown in FIG. A plurality of linear metal rib members 8 having a blade shape 8a are detachably attached along the pipe axis direction, or fixed by welding or the like, so that a drilling function portion is formed on the outer peripheral surface of the fluid pipe 2. May be. At this time, it is preferable to bend the both ends of the rib member 8 obliquely toward the circumferential direction of the fluid pipe 2 so that the soil excavated by the excavating function part is brought toward the center of the fluid pipe 2.

  As shown in FIGS. 5 and 6, the rotary drive device 4 described above is a casing in which a rotary shaft 4a extending coaxially with the fluid pipe 2, a reduction gear and an electric motor are integrated, and rotates the rotary shaft 4a. The geared motor 4b includes a first holding body 5 in a state in which the rotating shaft 4a protrudes toward the fluid pipe 2 side. Is held by. An axial movement means 10 of the centering device according to the present invention is attached to the center of the front surface of the geared motor 4b.

  The pipe holding portion 9 includes a clamp 9a having an inner diameter larger than the outer diameter of the fluid pipe 2, and four upper / lower / left / right expandable members 9c that can be expanded and contracted from the center of the clamp 9a toward the inner peripheral surface 9b of the clamp 9a. A head 9d that abuts against the inner peripheral surface of the fluid pipe 2 is provided at the distal end of each expansion member 9c. Although not particularly shown, the expansion and contraction members 9c can be expanded and contracted by moving a fluid such as hydraulic pressure or air pressure from the outside of the clamp 9a with a piston. In addition, the expansion-contraction member 9c may be expanded-contracted when the gear etc. which were incorporated by electric control drive.

  After the fluid tube 2 is inserted into the clamp 9a, the tube holding portion 9 presses the inner peripheral surface of the fluid tube 2 toward the inner peripheral surface 9b of the clamp 9a by the extension of each expansion member 9c. The end of the is held in a relatively non-rotatable manner.

  The fluid pipe 2 is rotated about the pipe axis by driving the rotation driving device 4 while being held by the pipe holding portion 9, and the sheet members 3, 3 are rotated along with the rotation of the fluid pipe 2. 'Rotates around the tube axis of the fluid tube 2. As described above, the rotational drive device 4 employs the geared motor 4b, so that the fluid pipe 2 can be rotated with a strong torque.

  As shown in FIGS. 1 and 9, the advancing / retreating drive devices 7 and 7 described above are supported by two self-propelled heavy machines 30 and 30 arranged on the ground, and can extend and contract with respect to the ground 7a. And a pressure device (not shown), and the above-mentioned first expansion / contraction means 11 described later is a part of a constituent member of the centering device of the present invention at the tip of each cylinder 7a. A holding body 5 and a second holding body 6 are attached. The fluid pipe 2 is held substantially parallel to the ground by the forward / backward drive device 7.

  Next, a fluid pipe introduction (embedding) method using the introduction device 1 will be described with reference to FIGS. As shown in FIG. 9A, first, rectangular work shafts 12, 12 are excavated on the ground using a power shovel (not shown) or the like. The work shafts 12 and 12 are formed so as to be spaced apart from the both ends of the fluid pipe 2 by substantially the same width as the length in the tube axis direction so that both ends of the fluid pipe 2 buried in the ground protrude from the ground. The first and second holding bodies 5 and 6 and the advancing / retreating drive device 7 that hold the sway are movable in the vertical direction in the work shafts 12 and 12. Note that a retaining plate 13 such as a sheet pile (see FIG. 6) is driven so that the surrounding earth and sand in the work shaft 12 does not collapse.

  Next, the rotation drive device 4 attached to the front end portion of the fluid pipe 2 is held by the first holding body 5 and the rear end portion of the fluid pipe 2 is held by the second holding body 6. 4 and the first and second holding bodies 5, 6 are moved so as to be positioned immediately above the work shafts 12, 12, and the fluid pipe 2 is rotated by the rotation driving device 4.

  Next, as shown in FIG. 9B, while the fluid pipe 2 held in a substantially horizontal direction with respect to the ground is rotated, the fluid pipe 2 is advanced substantially horizontally toward the ground by the advancing / retreating drive devices 7 and 7. Let Thereby, the fluid pipe 2 is gradually introduced into the ground while the blade 3b of the sheet members 3 and 3 'excavates the ground, and the fluid pipe 2 can be introduced to a desired position shown in FIG. 9C. .

  At this time, each blade portion 3b provided on both sides of the substantially central portion of the fluid pipe 2 is formed in a spiral shape opposite to each other toward the substantially central portion of the fluid tube 2, The earth and sand generated at the time of excavation are drawn toward the position on the substantially central portion side of the fluid pipe 2, and the inflow of the earth and sand into the work shafts 12 and 12 where the rotary drive device 4 moves forward is suppressed. Furthermore, as described above, since the blade portion 3b is provided with an inclination, the substantially entire surface of the tapered surface 3f is directed toward the center of the fluid pipe 2. (See FIG. 3).

  The introduction process of the fluid pipe 2 will be described in more detail. As shown in FIG. 10A, after the fluid pipe 2 has been moved downward by a predetermined distance, as shown in FIG. The advancement of the drive and advance / retreat drive device 7 is temporarily stopped. Then, as shown in FIG. 10 (c), the fluid pipe 2 is retreated upward within a range shorter than its advance. Thereby, the earth and sand scraped up above the fluid pipe | tube 2 is compressed, and the state compressed is maintained. Thereafter, as shown in FIG. 10 (d), the fluid pipe 2 is introduced to a desired position while repeating the fluid pipe 2 for a predetermined distance again. By having such a process, the introduction operation can be continued in a state where no load is applied to the fluid pipe 2 due to the earth and sand scraped upward. In addition, when the embedding position is shallow and the weight of earth and sand on the fluid pipe 2 is small, the operation of retracting the fluid pipe 2 by the advance / retreat drive device 7 may be omitted.

  As described above, by rotating and driving the sheet members 3 and 3 ′ by the rotation drive device 4, the advancing / retreating drive device 7 is moved forward from above through the work shaft 12, thereby allowing the ground by the sheet members 3 and 3 ′. Since the fluid pipe 2 is gradually introduced into the ground while excavating, the excavation work of the ground and the introduction work of the fluid pipe 2 can be performed collectively, and the introduction work of the fluid pipe 2 can be performed efficiently. .

  After the introduction process of the plurality of fluid pipes 2 is completed, the adjacent fluid pipes 2 and 2 are connected using the work shaft 12. When the fluid pipes 2 and 2 need not be aligned with each other, the rotary drive device 4 and the first and second holding bodies 5 and 6 are removed from the fluid pipe 2 and the advance / retreat drive device 7 is removed from the work shaft 12. Then, the fluid pipes 2 can be connected to each other by a pipe joint or the like. However, when misalignment occurs between the fluid pipes 2 and 2, the centering operation can be performed by the centering method and the centering apparatus according to the present invention.

  Next, the centering method and centering apparatus of the present invention will be described. First, the centering device will be described. The centering device includes the rotary drive device 4 described above, the first and second holding bodies 5 and 6, the axial movement means 10, the first expansion / contraction movement means 11, and the second expansion / contraction movement means 15 described later. The fluid pipe 2 can be continuously centered without removing them after the introduction process of the fluid pipe 2 is completed.

  As shown in FIGS. 5 and 6, the axial movement means 10 attached to the front surface of the geared motor 4b is operated by fluid pressure supplied from, for example, a compressed air supply device or a hydraulic supply device installed on the ground surface. And a piston rod 10a that is extended with respect to the cylinder by the fluid pressure. When the tip of the piston rod 10 a presses the retaining plate 13 of the work shaft 12, the fluid pipe 2 can be moved rearward in the axial direction together with the rotation drive device 4.

  The first holding body 5 on the front side holding the rotation drive device 4 includes a frame body 14 formed in a frame shape in front view so as to surround the geared motor 4b. The frame body 14 includes a pair of upper and lower horizontal frame members 14a, 14a facing in the left-right direction, and a pair of left and right vertical frame members 14b facing in the up-and-down direction with both upper and lower ends screwed to opposite surfaces of both ends. 14b, and the frame body 14 is assembled so as to be disassembled.

  A holding member 15 that holds the upper, lower, left and right outer peripheral surfaces of the geared motor 4b movably in the tube axis direction is provided at the inner surface center of the upper and lower horizontal frame members 14a, 14a and the inner surface center of the left and right vertical frame members 14b, 14b. Are fixed to face each other. A sliding member 15a made of synthetic resin or the like having a low frictional resistance is fixed to the contact surface of the holding member 15 with the geared motor 4b at the front end portion in order to reduce the sliding frictional resistance with the outer peripheral surface of the geared motor 4b. Has been. When the piston rod 10 a of the axial movement means 10 is extended and the retaining plate 13 of the work shaft 12 is pressed, the entire rotary drive device 4 including the geared motor 4 b and the fluid pipe 2 receive reaction force from the retaining plate 13. The received axial movement means 10 moves rearward in the tube axial direction with respect to the first holding body 5.

  On the left and right outer surfaces of the horizontal frame members 14a and 14a, a pair of upper and lower second expansion / contraction moving means 16 and 16 are respectively attached so as to protrude leftward and rightward. For example, a fluid pressure cylinder that is operated by a fluid pressure supplied from a compressed air supply device or a hydraulic pressure supply device installed on the ground surface is used as the second expansion / contraction moving means 16, and a piston rod 16 a that is expanded and contracted by the fluid pressure is used. Have. A guide roller 17 that rotates about an axis that faces in the front-rear direction is attached to the tip of the piston rod 16a. When the piston rods 16 a, 16 a of the upper and lower second expansion / contraction moving means 16, 16 are extended in synchronization and the retaining plate 13 of the work shaft 12 is pressed by the guide roller 17, the fluid pipe 2 is moved together with the first holding body 5. The front side can be moved in the left-right direction.

  The first telescopic movement means 11 attached to the lower end of the cylinder 7a of the advance / retreat drive device 7 is, for example, a fluid operated by a fluid pressure supplied from a compressed air supply device or a hydraulic supply device provided in the heavy machine 30. A pressure cylinder is used, and at the lower end portion of the piston rod 11a facing downward, the central portion in the left-right direction of the mounting plate 18 fixed to the center of the upper surface of the upper horizontal frame member 14a in the first holding body 5, The brackets 19 and 19 are connected to each other through two front and rear brackets 19 and 19 fixed to the mounting plate 18. When the first expansion / contraction moving means 11 is operated to expand and contract the piston rod 11a in the vertical direction, the front side of the fluid pipe 2 can be moved in the vertical direction together with the first holding body 5.

  Next, with reference to FIGS. 7 and 8, the second holding body 6 holding the rear side of the fluid pipe 2 and the second expansion / contraction moving means 16 provided on the second holding body 6 will be described. The second holding body 6 and the second expansion / contraction moving means 16 are basically the same in configuration as the first holding body 5 and the second expansion / contraction moving means 16 provided on the first holding body 5 and are the same as the members common to them. The detailed description is abbreviate | omitted and only a different part is demonstrated.

  In the central part of the inner surfaces of the upper and lower horizontal frame members 14a and 14a and the left and right vertical frame members 14b and 14b in the frame body 14 constituting the second holding body 6, there is an outer peripheral surface of the rear end portion of the fluid pipe 2. Support rollers 20 that support upper, lower, left, and right outer peripheral surfaces at four locations are rotatably supported by roller support members 21 attached to the horizontal frame member 14a and the vertical frame member 14b. The support member 21 pivotally supporting the upper and lower support rollers 20 is attached to the horizontal frame member 14a so as to be horizontally rotatable, and the roller support member 21 pivotally supporting the left and right support rollers 20 is It is attached to the vertical frame member 14b so as to be vertically rotatable. That is, each support roller 20 has a caster structure that rotates in all directions via the roller support member 21. When the fluid pipe 2 is held by such a support roller 20, when the fluid pipe 2 is rotated by the rotation driving device 4, the fluid pipe 2 is smoothly rotated with a light driving force without damaging the outer peripheral surface of the fluid pipe 2. be able to. Further, when the fluid pipe 2 is moved in the pipe axial direction by the axial movement means 10 described above, all the support rollers 20 automatically follow the fluid pipe 2 and change the direction of 90 °. It can be moved in the tube axis direction while smoothly guiding.

  When performing a centering operation to be described later, when the piston rods 16a, 16a of the upper and lower second expansion / contraction moving means 16, 16 are extended in synchronization and the earth retaining plate 13 of the work shaft 12 is pressed by the guide roller 17, the second The rear side of the fluid pipe 2 together with the holder 6 can be moved in the left-right direction. Similar to the first holding body 5, the second holding body 6 is attached to the lower end of the cylinder 7 a of the advance / retreat driving device 7 via the first telescopic movement means 11, and when performing a centering operation described later, When the first expansion / contraction moving means 11 is operated to expand and contract the piston rod 11a in the vertical direction, the rear side of the fluid pipe 2 can be moved in the vertical direction together with the second holding body 6.

  Next, a centering method for centering the fluid pipes 2 and 2 using the above-described centering apparatus will be described. In the present embodiment, as described above, the centering operation is continuously performed after the step of introducing the fluid pipe 2 is completed. However, the centering operation is not limited to this. You may carry out in parallel with a process. That is, when the fluid pipe 2 introduced up to the position shown in FIG. 9C is misaligned with respect to the previously introduced fluid pipe 2, the rotary drive device 4, the first and second holding members Since the bodies 5 and 6 and the advancing and retracting devices 7 and 7 are used as they are for the centering operation without being removed, the mounting process of the rotational driving device 4 to the front end of the fluid pipe 2 and the rotational driving device 4 are held first. The step of holding by the body 5 and the step of holding the rear end portion of the fluid pipe 2 by the second holding body 6 are omitted. Further, since the work shafts 12 and 12 have already been excavated, the excavation process can be omitted.

  First, the fluid pipe 2 introduced to the position shown in FIG. 9C is rotated by the rotation driving device 4 and is configured by the blade portions 3b of the sheet members 3 and 3 ′ fixed to the outer peripheral surface of the fluid pipe 2. The ground around the fluid pipe 2 is stirred and softened by the excavation function unit. At this time, the advancing / retreating devices 7 and 7 reciprocate the fluid pipe 2 in the vertical direction by a predetermined range, and operate the second expansion / contraction moving means 16 provided on the first and second holding bodies 5 and 6. Thus, it is preferable to move the fluid pipe 2 in the left-right direction. In this way, since the ground around the fluid pipe 2 is softened in a wide range, the upper and lower sides that are orthogonal to the pipe axis direction of the fluid pipe 2 held substantially horizontal (also referred to as the pipe axis orthogonal direction) The range of movement in the left-right direction can be increased, and even when the fluid pipe 2 is largely misaligned, it can be dealt with.

  Next, either one or both of the front and rear first expansion / contraction moving means 11 are operated simultaneously to move the fluid pipe 2 held by the first and second holding bodies 5 and 6 in the vertical direction, and the first The fluid pipe 2 is moved in the left-right direction by simultaneously operating one or both of the second expansion / contraction moving means 16 provided on the second holding bodies 5 and 6, and the fluid pipe 2 introduced earlier. Perform center alignment. At this time, since the ground around the fluid pipe 2 is weakened in the previous process and the restraining force of the fluid pipe 2 by the ground is reduced, the embedded fluid pipe 2 can be easily moved in the vertical and horizontal directions. it can. Further, since the guide roller 17 that moves up and down while rotating along the retaining plate 13 is attached to the piston rod 16a of the second expansion / contraction moving means 16, the first and second holding bodies 5, 6 can be moved up and down smoothly along the retaining plate 13.

  Next, after performing the centering operation with the fluid pipe 2 introduced earlier, as shown by a two-dot chain line in FIG. 9C, the axial movement means 10 attached to the rotation drive device 4 is operated, By extending the piston rod 10 a and pressing the retaining plate 13, the fluid pipe 2 is moved to the rear side in the pipe axis direction together with the rotation driving device 4. At this time, the rotation driving device 4 is held by the first holding body 5 so as to be slidable in the tube axis direction, and the support roller 20 of the second holding body 6 changes the direction of 90 °, and further the fluid pipe 2 Since the ground around is softened, the fluid pipe 2 can be easily moved in the pipe axis direction.

  Next, the fluid pipe 2 is moved rearward in the pipe axis direction until it contacts the end face of the previously introduced fluid pipe 2, and then the ends of the fluid pipes 2 and 2 are joined together by welding or a pipe joint. At the time of joining, when the end surfaces of the fluid pipes 2 and 2 are inclined with respect to the vertical direction as shown in FIG. 11 (a) and a gap is formed on the abutting surface, as shown in FIG. 11 (b). Then, after rotating the fluid pipe 2 by a predetermined angle by the rotation driving device 4 so that the end faces of the fluid pipes 2 and 2 are parallel to each other, the axial movement means 10 is operated as shown in FIG. Then, the fluid pipe 2 may be moved backward. If it does in this way, the end surfaces of fluid pipes 2 and 2 can be faced and joined without gap.

  After joining the ends of the fluid pipes 2 and 2, the advancing / retracting drive device 7 is removed, and the first and second holding bodies 5 and 6 assembled so as to be disassembled are disassembled and removed, and further rotated. After the drive device 4 is removed from the fluid pipe 2 and removed, the introduction operation of the next fluid pipe 2 is started. After joining the fluid pipes 2, 2, the work shaft 12 is backfilled with a liquid containing a solidifying agent or muddy water composed of a solidifying agent and earth and sand.

  As described above, according to the centering method and the centering device according to the embodiment, the fluid pipe 2 introduced and buried in the ground is rotated by the rotation driving device 4, and the protrusions on the outer peripheral surface of the fluid pipe 2 are formed. After the ground around the fluid pipe 2 is agitated and softened by the excavating function portion of the digging function portion, the restraining force of the fluid pipe 2 by the ground is reduced, and then the first and second telescopic movement means 11, 16 Since the second holding bodies 5 and 6 and the fluid pipe 2 held thereby are moved in the vertical and horizontal directions, even the fluid pipe 2 embedded in the ground can be easily moved in the vertical and horizontal directions. Centering work can be performed efficiently.

  In addition, since the axial movement means 10 is operated after the centering operation is performed, the fluid pipe 2 can be moved toward the previously introduced fluid pipe 2. Can be continuously performed.

  Furthermore, since the first and second holding bodies 5 and 6 are assembled so as to be disassembled, their removal work is also easy.

  As mentioned above, although the Example of this invention has been described based on drawing, a concrete structure is not restricted to these Examples, Even if there is a change and addition in the range which does not deviate from the summary of this invention, this invention. include.

  For example, in the above embodiment, one support roller 20 is attached to each of the upper, lower, left and right inner surfaces of the second holding body 6 that holds the rear end of the fluid pipe 2, but the outer peripheral surface of the fluid pipe 2 is stable. In order to hold it, a plurality of support rollers 20 may be arranged side by side in the tube axis direction.

  Moreover, in the said Example, although the 1st, 2nd holding bodies 5 and 6 are attached to the cylinder 7a of the advancing / retreating drive device 7 with the 1st expansion-contraction moving means 11 and 11 which move an up-down direction, A pair of right and left may be provided on top of the first and second holding bodies 5 and 6 so that the second holding bodies 5 and 6 are directly moved in the vertical direction. In this case, what is necessary is just to support the upper end part of a 1st expansion-contraction moving means with the support body installed, for example in the ground surface.

  Moreover, in the said Example, although the 2nd holding body 6 hold | maintains the rear-end part of the fluid pipe | tube 2, when the fluid pipe | tube is elongate, the 2nd which hold | maintains the rear-end part of this fluid pipe | tube. In addition to the holding body 6, another second holding body that holds the intermediate portion of the fluid pipe may be configured.

DESCRIPTION OF SYMBOLS 1 Introduction apparatus 2 Fluid pipe 3, 3 'Sheet member (excavation function part)
3a Sheet-like part 3b Blade part 3f Tapered surface 4 Rotation driving device 4a Rotating shaft 4b Geared motor 5 First holding body 6 Second holding body 7 Advance / retreat driving device 7a Cylinder 8 Rib member 8a Serrated tooth 9 Tube holding part 9a Clamp 9c Telescopic member 9d Head 10 Axial moving means 10a Piston rod 11 First telescopic moving means (first moving means)
11a Piston rod 12 Work shaft 13 Earth retaining plate 14 Frame 14a Horizontal frame member 14b Vertical frame member 15 Holding member 15a Sliding member 16 Second expansion / contraction moving means (second moving means)
16a Piston rod 17 Guide roller 18 Mounting plate 19 Bracket 20 Support roller 21 Roller support member

Claims (7)

A projecting excavation function part is provided on the outer peripheral surface, and the fluid pipe held substantially horizontal to the ground is moved downward toward the ground while rotating. The excavation function part excavates the ground while excavating the ground. A method for centering and joining fluid pipes embedded in
At one end of the fluid pipe , a rotation driving device and an axial direction moving means for moving the fluid pipe in the tube axis direction are mounted, and the rotation driving device is attached to the fluid pipe in the tube axis direction by a first holding body. And can be moved in a direction perpendicular to the tube axis direction .
A step of holding at least the other end of the fluid pipe in a tube axis direction of the fluid pipe by a second holding body , movable in a direction orthogonal to the tube axis direction , and rotatably.
Rotating the fluid pipe embedded in the ground by the rotation driving device, and stirring the ground around the fluid pipe by the excavation function unit;
By moving the fluid pipe in a direction orthogonal to the pipe axis direction, the fluid pipe is aligned with the fluid pipe previously embedded in the ground ,
With the first holding body and the second holding body holding the fluid pipe and the rotation driving device, the axial movement means moves the fluid pipe toward the fluid pipe previously embedded. Moving in the axial direction;
Joining the end of the fluid pipe and the fluid pipe buried previously;
A method for centering and joining a fluid pipe buried in the ground, comprising: In the step of stirring the soil, centering of the fluid pipe being buried in the ground according to claim 1, wherein the moving in the direction perpendicular to the tube axis direction while rotating the fluid tube, Joining method. A centering / joining device for use in the centering / joining method of a fluid pipe buried in the ground according to claim 1 or 2 ,
A rotary drive device mounted on one end of the fluid pipe and rotating the fluid pipe;
An axial movement means connected to the rotary drive device for moving the fluid pipe in the pipe axis direction;
A first holding body that holds the rotation driving device so as to be movable in the direction of the pipe axis of the fluid pipe and to be movable in a direction perpendicular to the direction of the pipe axis ;
A second holding body that holds at least the other end of the fluid pipe in a direction of the pipe axis of the fluid pipe, is movable in a direction orthogonal to the pipe axis direction of the fluid pipe , and is rotatable. ,
First moving means for moving the first holding body in a direction orthogonal to the pipe axis direction of the fluid pipe;
Second moving means for moving the second holding body in a direction perpendicular to the tube axis direction of the fluid pipe;
A centering / joining apparatus comprising: Said first, second retaining member is a core according to claim 3, with each forming the rotary driving device and a frame shape surrounding the end portion of the fluid conduit, characterized in that it assembled degradable Out / joining equipment. The centering / joining device according to claim 4 , wherein a support roller that rotatably supports an outer peripheral surface of the fluid pipe is provided on an inner surface of the second holding body. 6. The centering / joining apparatus according to claim 5 , wherein the support roller is attached to the second holding body so that the fluid pipe can be guided in a pipe axis direction. The centering / joining device according to any one of claims 3 to 6, wherein the second moving means includes a guide roller that is movable in the vertical direction along the inner wall of the work shaft.

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