JP2010164072A - Pipe body arrangement method and carrying truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit rolling of a carrying truck for a new pipe, in a small diameter sheath pipe which a man cannot enter. <P>SOLUTION: A rail 40 extending in a pipe axial direction is freely movably mounted in the small diameter sheath pipe 1 which a man cannot enter. The new pipe 2 is fixed on a movable carrying truck 10 along the rail 40, and the new pipe 2 is arranged in the sheath pipe 1 by moving the carrying truck 10 along the rail 40. Load of the carrying truck 10 and the new pipe 2 acts on the rail 40 through wheels 15 of the carrying truck 10. The rail 40 is pressed against a bottom of the sheath pipe 1 by action of the load. Since the rail 40 is pressed against an inner surface of the sheath pipe and is prevented from moving by own weight of the carrying truck 10 and the new pipe 2, work for fixing the rail 40 on in the sheath pipe by bolts is not necessary and rolling of the carrying truck 10 is inhibited by the rail 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a tubular body piping method for piping by inserting a tubular body having a smaller diameter than the sheath pipe into a sheath pipe buried in the ground, and a transportation carriage for a tubular body used in the tubular body piping method. is there.

  When various cables such as electric wires, communication lines, and optical fiber cables are passed through the sheath pipe buried in the ground, a small diameter pipe (hereinafter referred to as “new pipe”) may be inserted into the sheath pipe for piping. is there.

  In many cases, a plurality of new pipes are fixed in the sheath pipe, and the electric wires or the like are passed through corresponding new pipes according to the type.

  When inserting a new pipe into the sheath pipe, there are shafts that lead to the ground at one end and the other end of the sheath pipe, and the new pipes are connected sequentially from the vertical shaft at one end to the vertical shaft at the other end. It will be inserted.

  A rail extending in the tube axis direction is fixed to the bottom of the sheath with a bolt or the like screwed into the inner surface thereof so as not to move. The new pipe is suspended in a vertical shaft at one end and then fixed to a transport carriage that travels along the rail. A plurality of transport carts can be connected in the tube axis direction via rods (connecting rods).

  The newly installed new pipe is already connected to the other new pipe that is fixed to the preceding transport carriage and enters the pipe, and supports the new carriage and the other new pipe. Connect the transport cart with a rod. This operation is repeated, and new pipes are sequentially piped in the sheath pipe.

  At this time, since the rail is fixed so as not to move with respect to the sheath, the transport carriage does not roll (the transport carriage does not rotate around the sheath axis of the sheath). For this reason, a newly installed pipe can be piped in the sheath without twisting (see, for example, Patent Document 1 and Patent Document 2).

JP 2003-83470 A JP-A-6-265050

According to said method, it is necessary to fix so that a rail may not move in a sheath pipe. As described above, this operation is performed by fixing the bolt in the sheath.
However, when the inner diameter of the sheath tube is small, since a person cannot enter the sheath tube, it is difficult to fix the rail to the sheath tube.

  In particular, in the case of a sheath pipe having a diameter of less than φ800 (less than 800 mm in inner diameter), it is forbidden for a person to enter the sheath pipe by notification of the country. It was.

  Accordingly, an object of the present invention is to suppress the rolling of a carriage for a newly installed pipe in a small diameter sheath that cannot be entered by a person.

In order to solve the above problems, the present invention lays a rail extending in the direction of the tube axis in the sheath tube, and fixes a new tube having a smaller diameter than the sheath tube to a carriage that can travel along the rail, In the tubular body piping method for moving the transport carriage along the rail, moving the new pipe fixed to the transport carriage within the sheath pipe and piping the new pipe into the sheath pipe,
The sheath tube has an inner diameter that a person cannot enter inside, and the rail is movably mounted on the bottom of the sheath tube, and the rail passes through the wheels of the transport carriage that travels on the rail. A load is applied to the carriage and the new pipe, and the rail is pressed against the bottom of the sheath pipe and fixed so as not to move by the action of the load.

Since the rail is pressed against the sheath and the inner surface of the tube by the own weight of the transport carriage and the new tube, it is not necessary to fix the rail in the sheath with a bolt or the like. That is, the transport carriage travels along a rail fixed so as not to move due to the weight of the transport carriage and the newly installed pipe, and no rolling occurs in the transport carriage.
In this way, since the work for fixing the rails is unnecessary, rolling of the carriage for a new pipe can be suppressed even in a small-diameter sheath in which a person cannot enter the inside.

In this configuration, only one rail is mounted on the bottom of the sheath tube, and a downward wheel provided on the transport carriage is provided only at one location in the pipe circumferential direction in order to travel the rail. can do.
For example, in addition to the wheels traveling on the rail, it is possible to provide another downward wheel and roll the other downward wheel to the sheath inner surface.
However, in this way, by setting the downward wheel only for rail travel, most of the load of the transport carriage and the new pipe will act on the rail, so the pressing force against the rail is improved and the rail is moved. Can be prevented.

The transport carriage includes a pipe support portion having a vertical frame extending in the vertical direction, the new pipe is fixed to the pipe support portion, and the wheel is provided at a lower portion of the vertical frame. Can be configured.
By providing the rail running wheel at the lower part of the vertical frame, the load of the new pipe fixed to the vertical frame is easily transmitted directly to the wheel along the vertical frame. For this reason, the pressing force with respect to a rail can be improved.

In the configuration in which the vertical frame is provided, the tube support portion may have a cross shape in which a horizontal frame extending in a horizontal direction is fixed to the vertical frame. At this time, the new pipe can be configured to be fixed to the pipe support portion by a holding tool spanned between the vertical frame and the horizontal frame.
If the tube support portion has a cross shape, it is possible to secure at least four spaces sandwiched between the vertical frame and the horizontal frame around the intersection at the center of the cross. If the new pipe is fixed to each of the four spaces using the holders, the weight of the fixed new pipe can be transmitted to the wheel through the vertical frame.

The number of new pipes to be fixed in each of the four spaces, that is, the space between the vertical frame and the horizontal frame, may be one for each location, or multiple for each location. May be.
Further, in order to ensure the running stability of the transport carriage, it is desirable that the weights of the transport carriage and the newly installed pipe are equal on the left and right with the vertical frame as the center.

  When inserting the new pipe into the sheath pipe while sequentially connecting it using the transport carriage, the new pipe has a stepped portion on the outer periphery of the end on the receiving side, and the new pipe has its receiving port. The side end is fixed to the tube support on the insertion port side of the stepped portion, and the insertion port of another subsequent new tube is fitted into the fixed new tube receiving port, and the subsequent another The new pipe can be configured such that the end on the receiving side is fixed by the pipe support part of another subsequent carriage.

If the insertion port side of the stepped portion of the receiving port is fixed to the pipe support portion of the transport carriage, the stepped portion will intervene even in the section where the sheath tube is curved in the vertical direction or the horizontal direction. Is difficult to come off from the tube support. If the end portion on the receiving port side is not easily detached from the tube support portion, the insertion port of another newly installed tube fitted in the receiving port is also difficult to be detached from the tube support portion.
In addition, if the conveyance carriage that fixed the new pipe and the conveyance carriage that fixed another new pipe that follows are connected with a rod, the distance in the tube axis direction between both conveyance carriages can be kept constant, It is possible to more reliably prevent the insertion port from coming out of the receiving port.
The length of the rod is longer than the length when the new pipe is connected, and when the new pipe is connected, a gap in the tube axis direction is created between the pipe bodies in the receiving port. It is possible to prevent the tube main bodies from interfering with each other in the receiving port of the newly installed tube at the curved portion.

  Further, if the wheels that run on the rail are provided on both sides in the tube axis direction with the tube support portion interposed therebetween, the balance with respect to the front and rear direction of the conveyance carriage is improved, and the running stability is improved.

Further, the rail has a cross section that gradually decreases in width from the lower end toward the upper end, the wheel is provided with a groove along its outer periphery, and the groove of the wheel fits at the upper end of the rail. It can be configured.
Since the rail has a cross section that gradually decreases in width from the lower end toward the upper end, the load from the wheel acts on an area having a relatively small area at the upper end of the rail. Further, since the rail becomes wider as it goes from the upper end to the lower end, the load transmitted to the rail is transmitted to a wider range with respect to the bottom of the sheath tube. For this reason, the pressing force of the rail acts on a wider range with respect to the sheath and the rail becomes difficult to move.

  For example, the rail of the cross section whose width gradually decreases from the lower end toward the upper end can be formed of a steel material having an L-shaped cross section in which a pair of plane portions in different plane directions are connected by a bent portion. If the outer surface of the bent portion of the steel material having an L-shaped cross section is in an upward state, the rail can be a cross section that gradually decreases in width from the lower end toward the upper end.

  Moreover, it can be set as the structure which provides the guide wheel which protrudes to a pipe radial direction outer side in the said conveyance trolley, and the guide wheel rolls to the inner surface of the said sheath pipe | tube with the driving | running | working of the said conveyance trolley. If the guide wheel rolls on the inner surface of the sheath, the running stability of the transport carriage is improved.

  Further, when the guide wheel is provided to protrude upward, the reaction force received from the sheath inner surface by the guide wheel protruding upward is applied to the rail through the downward wheel. Since the pressing force against the rail is improved, it is more desirable to fix the rail so as not to move.

  The following configurations can be adopted as a transport carriage used in each of these pipe body piping methods. That is, a wheel that travels on a rail that is movably mounted on the bottom of the sheath pipe, and the load of the new pipe fixed to the transport carriage and the transport carriage is applied through the wheel. It is a transporting carriage for a new pipe having a function capable of fixing the rail so as not to move by pressing the rail against the bottom of the sheath pipe by the action of a load.

  The present invention prevents the movement of the carriage and the newly installed pipe due to the weight of the rail being pressed against the inner surface of the pipe, so that even in a small diameter sheath where the person cannot enter the inside of the pipe, Rolling can be suppressed.

1 shows an embodiment, (a) is a front view, (b) is a side view, and (c) is an enlarged view of the main part of (a). (A) is a cross-sectional view taken along the line aa in (b), (b) is a front view, (c) is a cross-sectional view taken along the line cc in (b), (d) is a bottom view, e) is a sectional view taken along line ee of (c). The detail of the holder for lower spaces is shown, (a) is a front view, (b) is a bottom view, (c) is a side view The detail of the holder for upper spaces is shown, (a) is a top view, (b) is a front view, (c) is a bottom view, (d) is a side view. Explanatory drawing showing the state where new pipes are piped into the sheath pipes using a transport carriage Front view showing details of rail The detail of the rail used for a front-end | tip part is shown, (a) is a front view, (b) is a side view, (c) is a bottom view. The detail of the rail used for the front-end | tip part of other embodiment is shown, (a) is a front view, (b) is a side view, (c) is a bottom view.

  An embodiment will be described with reference to the drawings. In this embodiment, as shown in FIG. 5, a plurality of new pipes 2 are piped while being sequentially connected in a sheath pipe 1 buried in the ground so as to connect a pair of vertical shafts 3 and 4. Is.

  A vertical shaft (one vertical shaft) 4 shown on the right side of FIG. 5 is an arrival side vertical shaft 4 when propelling the sheath tube 1, and a vertical shaft (other shaft) 3 shown on the left side is the starting side of the sheath tube 1. It is a shaft 3.

  A rail 40 extending in the tube axis direction is laid in the sheath tube 1. The rail 40 is inserted into the sheath pipe 1 while sequentially connecting things of a certain length from the arrival side shaft 4 toward the start side shaft 3. In this embodiment, only one rail 40 is arranged at the bottom of the sheath tube 1.

  Details of the rail 40 are shown in FIGS. 6 and 7. The rail 40 is made of a steel material having an L-shaped cross section in which a pair of plane portions 44 whose plane directions are orthogonal to each other are connected by a bent portion 43. Since the outer surface of the bent portion 43 is in an upward state, the rail 40 has a cross section that gradually decreases in width from the lower end toward the upper end.

  As shown in FIG. 6, the rails 40 are connected to each other by attaching two flat connection members 45 to one end of the rail 40. As shown by the arrows in the figure, this connecting member 45 is inserted into the other end of another rail 40, and after aligning the hole 44a and the female screw 45a, a bolt is inserted into the hole 44a and tightened to fix them. To do. By repeating this connection operation, the rail 40 is extended into the sheath 1.

  As shown in FIG. 7, a circular retractor 42 is attached to the leading rail 40. The retractor 42 is provided with a screw shaft portion 42a. The screw shaft portion 42a is fixed to one end of the rail 40 by welding.

  In addition, a guide plate 41 is provided behind the retractor 42 along the bottom surface of the rail 40. Further, a pull-in guide 46 is provided under the guide plate 41. The guide plate 41 has a shape along the inner surface of the sheath tube 1, and the pull-in guide 46 minimizes the area where the tip of the rail 40 contacts the inner surface of the sheath tube 1 and inserts the rail 40. It has a function of reducing the frictional resistance with the sheath 1. Note that a guide plate 41 having a cross-sectional arc shape as shown in FIG. 8 may be employed. The guide plate 41 guides the insertion of the rail 40 while being in surface contact with the inner surface of the sheath 1.

  The sheath tube 1 has an inner diameter that a person cannot enter, and the rail 40 is inserted while being sequentially connected from the reaching side shaft 4, and is placed on the bottom of the sheath tube 1 so as to be movable. The rail 40 is not fixed in the sheath 1 with a bolt or the like.

  Moreover, as shown in FIGS. 1 and 2, the wheel 15 traveling on the rail 40 is provided with a groove along the outer periphery thereof. For this reason, the wheel 15 rotates in a state where the bent portion 43 at the upper end of the rail 40 is fitted in the groove of the wheel 15 so that the wheel 15 does not come off the rail 40.

  The new pipe 2 is fixed to the transport carriage 10 that travels in the sheath pipe 1 along the rail 40 after being withdrawn in the arrival side shaft 4 shown in FIG.

.
As shown in FIGS. 1 and 2, the transport carriage 10 includes a pipe support portion 11 having a cross shape in which a horizontal frame 13 extending in a horizontal direction is fixed to a vertical frame 12 extending in a vertical direction.

  The new pipe 2 is fixed to the pipe support portion 11 with respect to the pipe support portion 11 by a holder 30 that is stretched between the vertical frame 12 and the horizontal frame 13.

The holding tool 30 includes a holding tool 30 for the lower space shown in FIG. 3 and a holding tool 30 for the upper space shown in FIG.
The holder 30 for the lower space includes an arc-shaped portion 32 along the outer peripheral surface of the new pipe 2 and locking portions 31 provided at both ends in the circumferential direction of the arc-shaped portion 32. Since the elastic member 32a is attached to the inner surface of the arc-shaped portion 32, the holder 30 and the outer surface of the new pipe 2 are brought into contact with elasticity.

The locking portion 31 is a steel material having an L-shaped cross section, and is fixed to the arc-shaped portion 32 by welding or the like. Further, the locking portion 31 is provided with an elongated locking hole 31a.
A base 19 is provided at each end of the vertical frame 12 and the horizontal frame 13. In this embodiment, a total of four bases 19 are provided. Each base 19 is provided with a locking hole 19a. The locking hole 19a is formed so as to penetrate each of the frames 12 and 13.

  After the locking hole 31a of the locking part 31 and the locking hole 19a of the base part 19 are aligned, bolts are inserted into both the locking holes 31a and 19a. By tightening the nut to the bolt, the holder 30 is fixed to the tube support portion 11 by the both locking portions 31.

  In addition to the configuration of the lower space holder 30, the upper space holder 30 is provided with a support member 33 and a protruding piece 34, so that the new pipe 2 is also provided on the support member 33. Can be fixed.

  In this embodiment, in each of the four base portions 19, the locking portions 31 of the holder 30 are arranged opposite to each other across the base portion 19. That is, the respective locking portions 31 of the separate holders 30 located on both sides of the base portion 19 are fixed to the common base portion 19 by common bolts and nuts.

  Wheels 15 for traveling on the rail 40 are provided in the lower part of the vertical frame 12.

The method for fixing the wheel 15 to the vertical frame 12 will be described. The base 19 provided at the lower part of the vertical frame 12 is provided with a wheel receiving portion 14 that protrudes on both sides in the tube axis direction.
The wheel receiving portion 14 is formed with a fixing hole 14a, and a wheel fixing frame 15a to which the wheel 15 is rotatably attached is fixed by bolts and nuts through the fixing hole 14a.

  Further, guide wheels 17 are provided above the vertical frame 12 and at each base 19 at both ends of the horizontal frame 13.

The method of fixing the guide wheel 17 to the vertical frame 12 and the horizontal frame 13 will be described. Guide bases 16 that protrude on both sides in the tube axis direction are provided on the base portions 19 of the vertical frame 12 and the horizontal frame 13. It has been.
The guide wheel receiving portion 16 is formed with a fixing hole 16a, and a guide wheel fixing frame 17a to which the guide wheel 17 is rotatably attached is fixed by bolts and nuts through the fixing hole 16a. ing.

  The laying method of the new pipe 2 will be described. First, the rail 40 extending in the pipe axis direction is laid in the sheath pipe 1 so as to connect between the compatible wells 3 and 4. Further, the transport carriage 10 that can travel along the rail 40 is carried into the sheath pipe 1 through the arrival side shaft 4.

  Next, the new pipe 2 is sequentially carried in from the ground through the arrival side shaft 4 in the same manner. In this embodiment, four new pipes 2 smaller in diameter than the sheath pipe 1 are piped in parallel, and three new pipes 2 having a smaller diameter are further piped in parallel on the support member 33. (See FIG. 1A).

  First, the new pipe 2 that becomes the head toward the start side shaft 3 is fixed to the pipe support portion 11 of the transport carriage 10. The end of the newly installed pipe 2 on the side of the insertion port 2 b is fixed to the pipe support part 11 with the holder 30. Further, the receiving port 2a of the new pipe 2 is fixed to the pipe support portion 11 of another transport carriage 10 disposed on the rear side.

Both transport carriages 10 are connected in the tube axis direction via rods (connecting rods) 20 and can travel along the rails 40 while maintaining a certain distance in the tube axis direction.
Both ends of the rod 20 are connected to rod connecting portions 21 provided on the transport carriage 10. In this embodiment, a connecting hole 21 a is formed in the rod connecting portion 21, and connecting holes are also formed at both ends of the rod 20. Both the connecting holes of the rod connecting portion 21 and the rod 20 are aligned and connected by bolts and nuts.

  The transport carriage 10 is made to travel a little toward the start side shaft 3, and the insertion opening 2b of the next new pipe 2 newly suspended is inserted into the receiving port 2a of the new pipe 2 fixed to the rear transport carriage 10. Fit. By inserting the insertion opening 2b of the next new pipe 2 into the receiving opening 2a of the preceding new pipe 2, the end of the next new pipe 2 on the insertion opening 2b side is held with respect to the pipe support portion 11.

  In addition, the end of the next new pipe 2 on the receiving port 2a side is fixed to the pipe support part 11 of still another transport carriage 10 disposed on the rear side. The transport cart 10 is also connected to the transport cart 10 immediately in front by the rod 20.

  At this time, the four new pipes 2 arranged in parallel are connected to each other, and the three new pipes 2 arranged in parallel on the support member 33 are also connected by the same method.

  In this way, the newly installed new pipe 2 is connected to the other new pipe 2 that is already fixed to the preceding transport carriage 10 and enters the sheath pipe 1, and supports the new new pipe 2 The carriage 10 and the transport carriage 10 that supports the preceding new pipe 2 are connected by a rod 20. This operation is repeated, and new pipes are sequentially piped in the sheath pipe.

  At this time, the load of the transport carriage 10 and the new pipe 2 acts downward on the rail 40 through the wheels 15 of the transport cart 10 that travels on the rail 40. Due to the action of the load, the rail 40 is pressed against the bottom of the sheath 1 so as not to move. Since the rail 40 is fixed so as not to move, rolling of the transport carriage 10 is prevented.

  In this embodiment, only one rail 40 is placed on the bottom of the sheath tube 1, and the downward wheels 15 provided on the transport carriage 10 are only the wheels 15 that travel on the rail 40. Therefore, almost all the loads of the transport carriage 10 and the newly installed pipe 2 act on the rail 40, and the sheath pipe 1 is firmly fixed.

  Further, since the guide wheels 17 projecting sideways are provided on both sides in the width direction of the transport carriage 10, the guide wheels 17 roll on the inner surface of the sheath tube 1 as the transport carriage 10 travels. For this reason, the conveyance cart 10 is prevented from falling.

  The guide wheel 17 is provided so as to protrude upward. For this reason, when the guide wheel 17 protruding upward hits the inner surface (ceiling surface) of the sheath tube 1, the reaction force received from the inner surface is applied to the rail 40 through the wheel 15, and the load acts on the rail 40. Has been increased. The upper guide wheel 17 also prevents the new pipe 2 from floating when the air mortar is filled.

  Furthermore, the newly installed pipe 2 of this embodiment has a step portion 2c on the outer periphery of the end portion on the side of the receiving port 2a, and the receiving port 2a side from the step portion 2c becomes a boundary from other portions having a constant tube diameter. It has a slightly enlarged shape.

The pipe support portion 11 of the transport carriage 10 holds the outer periphery of the newly installed pipe 2 on the side of the insertion port 2b with respect to the stepped portion 2c via the holder 30.
Since the tube support portion 11 holds the portion adjacent to the step portion 2c, the tube support portion 11 or the holding tool 30 is also a step portion even in a section where the sheath tube 1 is curved in the vertical direction or the left-right direction. The new pipe 2 is prevented from being detached from the pipe support portion 11 by being caught by 2c.

  Further, if the end of the new pipe 2 on the receiving port 2 a side is not easily detached from the pipe support portion 11, the insertion port 2 b of another new pipe 2 fitted in the receiving port 2 a is not easily detached from the pipe support portion 11.

Furthermore, at this time, since the conveyance carriage 10 to which the new pipe 2 is fixed and the conveyance carriage 10 to which another subsequent new pipe 2 is fixed are connected by the rod 20, in the tube axis direction between the two conveyance carriages 10. Is kept constant, and the insertion port 2b can be more reliably prevented from being removed from the receiving port 2a.
The length of the rod 20 is such that the position of the newly installed pipes 2 to be connected in the tube axis direction is completely fitted to the position where the insertion port 2b of the newly installed pipe 2 is in contact with the inner part of the receiving port 2a. Longer than the length of the tube, that is, when the newly installed tubes 2 are connected to each other, it is set so that a gap in the tube axis direction is generated between the tube main bodies in the receiving port 2a. It is possible to prevent the tube main bodies from interfering with each other in the receiving port 2a of the new pipe 2 at the section.

In this embodiment, the carriage 10 and the new pipe 2 are inserted from the arrival side shaft 4 toward the start side shaft 3 when the sheath tube 1 is propelled. Construction from the vertical shaft 3 toward the arrival side vertical shaft 4 is also possible.
Further, when the new pipe 2 is constructed from the arrival side resistance 4 of the sheath pipe 1 toward the start side resistance 3, the pipe transport carriage 10 is provided with a traction portion 22 having a quoting hole 22a. Therefore, the wire or the like can be locked in the quoting hole 22a, and construction can be performed sequentially. Furthermore, it is also possible to pull the transport carriage 10 from the front by locking a wire or the like in the quotation hole 22a.

  Moreover, the number of the vertical frame 12 and the horizontal frame 13 which comprise the pipe | tube support part 11 of the conveyance trolley | bogie 10 can be selected freely. For example, a mode in which two, three, or more horizontal frames 13 are fixed in a cross shape with respect to one vertical frame 12 positioned at the center in the sheath 1 is also conceivable. Also in this aspect, it is desirable that the loads of the transport carriage 10 and the new pipe 2 are transmitted to the lower wheel 15 through the vertical frame 12.

  Further, for example, a configuration in which two or three vertical frames 12 are juxtaposed, for example, or a configuration in which three or more vertical frames 12 are juxtaposed in the width direction of the transport carriage 10 when the sheath tube 1 has a large diameter is also conceivable. . At this time, it is desirable to provide the wheel 15 in the lower part of each vertical frame 12 in parallel. In that case, the rail 40 can be made into the number corresponding to the parallel number of the wheel 15.

  Moreover, in this embodiment, although the new installation pipe 2 for letting an electric wire, a communication line, other optical fiber cables, etc. pass is made into the object, also when piping the new installation pipe 2 which consists of other uses in the sheath pipe 1, The present invention can be applied.

DESCRIPTION OF SYMBOLS 1 Sheath pipe 2 Newly installed pipe 2a Receiving port 2b Insertion port 2c Step part 3 Vertical shaft (Saddle tube start side shaft)
4 vertical shafts (sheath pipe arrival side vertical shafts)
DESCRIPTION OF SYMBOLS 10 Conveyance carriage 11 Pipe support part 12 Vertical frame 13 Horizontal frame 14 Wheel receiving part 14a Fixing hole 15 Wheel 15a Wheel fixing frame 16 Guide wheel receiving part 16a Fixing hole 17 Guide wheel 17a Guide wheel fixing frame 18 Frame crossing part 19 Base 20 Rod (Connecting rod)
21 Rod connection part 21a Connection hole 22 Towing part 22a Towing hole 30 Holder 31 Locking part 31a Locking hole 32 Arc-shaped part 33 Supporting member 34 Projection piece 40 Rail

Claims (11)

A rail (40) extending in the axial direction of the pipe is laid in the sheath pipe (1), and a new pipe having a smaller diameter than that of the sheath pipe (1) is provided on the transport carriage (10) that can travel along the rail (40). 2) is fixed, and the transporting carriage (10) is moved along the rail (40), so that the new pipe (2) fixed to the transporting carriage (10) is placed in the sheath pipe (1). In the tubular body piping method of moving the new pipe (2) into the sheath pipe (1),
The sheath tube (1) has an inner diameter that a person cannot enter, and the rail (40) is movably mounted on the bottom of the sheath tube (1) and is attached to the rail (40). The load of the transport carriage (10) and the new pipe (2) acts through the wheels (15) of the transport carriage (10) traveling on the rail (40), and the rail (40 ) Is a tubular body pipe construction method that is fixed so as not to move by being pressed against the bottom of the sheath pipe (1).   Only one rail (40) is placed on the bottom of the sheath tube (1), and a downward wheel (15) provided on the transport carriage (10) is a tube for traveling the rail (40). The tubular body piping method according to claim 1, wherein only one portion is provided in the circumferential direction.   The transport carriage (10) includes a pipe support part (11) having a vertical frame (12) extending in the vertical direction, and the new pipe (2) is fixed to the pipe support part (11). And the said pipe | tube (15) is provided in the lower part of the said vertical frame (12), The pipe body piping method of Claim 2 characterized by the above-mentioned.   The pipe support portion (11) has a cross shape in which a horizontal frame (13) extending in the horizontal direction is fixed to the vertical frame (12), and the new pipe (2) is connected to the vertical frame (12). The pipe body piping method according to claim 3, wherein the pipe body is fixed to the pipe support portion (11) by a holding tool (30) spanned between the horizontal frame (13).   The new pipe (2) has a step (2c) on the outer periphery of the end on the side of the receiving port (2a), and the end of the new pipe (2) on the side of the receiving port (2a) has the stepped part. (2c) The insertion port (2b) is fixed to the tube support (11) on the side, and another new tube (2) is inserted into the receiving port (2a) of the fixed new tube (2). The opening (2b) is fitted, and the other new pipe (2) that follows is fixed at the end on the receiving port (2a) side by the pipe support (11) of another subsequent carriage (10). The tubular body piping method according to claim 3 or 4, wherein the tubular body piping method is provided.   The pipe body piping method according to any one of claims 3 to 5, wherein the wheel (15) is provided on both sides in the pipe axis direction with the pipe support portion (11) interposed therebetween.   The rail (40) has a cross section that gradually decreases in width from the lower end toward the upper end, the wheel (15) is provided with a groove along its outer periphery, and the groove of the wheel (15) is The pipe piping method according to any one of claims 1 to 6, wherein the pipe (40) is fitted to an upper end of the rail (40).   The rail (40) is composed of a steel material having an L-shaped cross section in which a pair of flat portions in different plane directions are connected by a bent portion, and an outer surface of the bent portion is in an upward state. Item 8. The pipe body piping method according to Item 7.   A guide wheel (17) protruding outward in the pipe radial direction is provided on the transport carriage (10), and the guide wheel (17) rolls on the inner surface of the sheath pipe (1) as the transport carriage (10) travels. The tubular body piping method according to any one of claims 1 to 8, wherein:   The guide wheel (17) is provided so as to protrude upward, and the reaction force received from the inner surface of the sheath pipe (1) by the guide wheel (17) protruding upward is transmitted through the rail (40) through the downward wheel (15). The pipe body piping method according to claim 9, wherein the pipe body piping method is provided.   It is a conveyance trolley | bogie (10) used for the pipe body piping construction method in any one of Claims 1 thru | or 10, Comprising: It travels along the rail (40) mounted movably on the bottom of the said sheath pipe | tube (1). The wheel (15) is provided, and the load of the conveyance carriage (10) and the new pipe (2) fixed to the conveyance carriage (10) is applied through the wheel (15). A transport carriage having a function of pressing the rail (40) against the bottom of the sheath pipe (1) so as not to move.

Images