JP2003214089A - Insertion pipe supporting device for sheath pipe jacking method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device with favorable jacking efficiency and providing safe construction for supporting an insertion pipe in regard to a sheath pipe jacking method for burying fluid transport piping to be used for water, gas, sewerage or the like underground. <P>SOLUTION: The insertion pipe supporting device for a sheath pipe jacking method for advancing the insertion pipes in a sheath pipe while joining them is provided with a clamp device provided with a plurality of rotors flexibly abutting on an outer circumference part of a precedent insertion pipe and supporting the insertion pipe, a jack moving the clamp device in a diametral direction of the insertion pipe, and a plurality of rails for passing casters or sleds attached to the insertion pipes. It is favorable to use a roller pair inclined in a V-shape and rotatably supported in a space part provided in the clamp device and energized outward by a spring as the rotors supporting the insertion pipe. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to support an insertion pipe in a sheathing propulsion method, which is a non-excavation propulsion method for burying fluid transportation piping used for water supply, gas, sewerage, etc. underground. The present invention relates to a supported device.

[0002]

2. Description of the Related Art As one construction method for burying a fluid transportation pipe such as a ductile cast iron pipe, there is a sheath pipe method. This method is a method of propelling a reinforced concrete pipe, a steel pipe, or the like as a sheath pipe, and inserting an insertion pipe such as a ductile cast iron pipe into the sheath pipe, which does not require excavation and is widely adopted.

FIGS. 14 and 15 show an outline of the above-mentioned conventional sheath tube type propulsion method, in which a sheath pipe (existing pipe) P ', which is buried between the starting pit H and the reaching pit, is constructed. Also, insert a new pipe (insertion pipe) P with a small diameter. The starting pit H is provided with a starting table B, and the plurality of rollers R mounted on the starting table support and propel the insertion tube P. The starting table for embedding the sheath is used as the starting table for the insertion tube. In this case, since the sheath tube and the insertion tube have different outer diameters, prepare multiple types of rollers (pipes) with different heights, and select and use a roller that is suitable for the dimensions of the insertion tube. The tube and the insertion tube are aligned. Further, even when the starting table for the new pipe (insertion pipe) is used, the centering is performed by using rollers or the like as described above. The starting table B has a pressing member (propelling table) C that moves back and forth along the upper surface of the starting table.
Is provided, and the pressing member is pressed by the hydraulic cylinder D. The insertion tube P is spliced by inserting the insertion opening S at the front end of the insertion side into the receiving opening U of the preceding insertion tube P. Many joint structures, including seismic joints, are known as joint structures for the insertion pipes, and thus specific details are omitted.

A propulsive force transmitting member (ring) 100 is attached near the insertion port of the insertion tube P, and between the rear end surface of the receiving end of the preceding pipe and the propulsive force transmitting member 100.
A collar 101 is provided which transmits the propulsive force but which is broken or contracted when a strong pushing force due to an earthquake or the like is applied to allow pushing of the pipe. During propulsion, the propulsion force transmission member pushes the preceding insertion tube through this collar and advances the row of insertion tubes. Therefore, it is possible to prevent the insertion port of the insertion tube from being pushed into the receiving port of the preceding tube during propulsion, and it is possible to secure the pushing white in the event of an earthquake. In addition,
Casters (or sleds) 103, which facilitate the movement of the pipe, are provided on the outer peripheral portion of the propulsion force transmitting member so that smooth propulsion is performed.

When the insertion tube is propelled by the above propulsion method,
Caster (or sled) for the propulsive force transmission member of the succeeding pipe
In order to prevent the insertion pipe from falling off until the pressing member (insertion base) C on the starting base retracts after the insertion pipe has been inserted and until 103 reaches the inside of the sheath, wood, a concrete block, It is necessary to support the receptacle U of the preceding pipe with a supporting member such as a hydraulic jack J. However, since the support member that supports the receiving port interferes with the joint portion, the support member must be removed when the pipe joint is joined and the pipe is inserted again. At this time, if the support member is removed, there is nothing to support the pipe joint, so another support member (rail, etc.) that supports the insertion tube until the caster of the propulsive force transmission member of the succeeding tube reaches the inside of the sheath tube. Had to use.

As described above, the conventional propulsion method is
Not only there is the problem that work efficiency is poor because complicated work is required, but the block or hydraulic jack that supports the insertion pipe during insertion or joint joining falls off and falls, and in the worst case the insertion pipe There was a risk that it could fall off the starting board and lead to a serious accident, and there was also a safety issue.

[0007]

Therefore, the present invention solves various problems in the above-mentioned conventional sheath tube propulsion method,
An object of the present invention is to provide a device that enables smooth, efficient, and safe construction.

[0008]

In order to solve the above problems, the present invention employs the following configurations. That is, the insertion tube support device for the sheath tube propulsion method according to the present invention is an insertion tube support device for the sheath tube propulsion method for propelling while inserting the insertion tube into the sheath tube, and is provided on the outer peripheral portion of the preceding insertion tube. A clamp device including a plurality of rotating bodies that elastically abut and support the insertion tube, a jack that moves the clamp device in the radial direction of the insertion tube, and a plurality of casters or sleds attached to the insertion tube that pass through. It is characterized by including a rail. As the rotating body that supports the insertion tube, a roller pair or a caster that is rotatably supported in a space provided in the clamp device in a substantially V-shaped inclination and is urged outward by a spring is used. You can

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described more specifically below based on the embodiments of the present invention shown in the drawings.
FIG. 1 shows an embodiment of the present invention. In this insertion tube supporting device 1, a pair of upper and lower clamps 3 and 4 are provided on a machine frame 2 having a substantially gate shape. The upper clamp 3 is a chain 10 stretched on sprockets 6 and 7 attached to the machine frame 2.
A weight 12, which is heavier than the upper clamp 3, is suspended at one end of the chain. Reference numerals 14 and 14 in the figure are elevating guides on which the upper clamp slides.

The lower clamp 4 is supported by a jack 15 so as to be vertically movable. The jack 15 is a pantograph type jack including four links 16, ..., The lower part is attached to the base 17, and the upper part is attached to the lower clamp 4. The lower ends of the upper pair of links and the upper ends of the lower pair of links are pivotally attached to nut-shaped members 19, 19 that are screwed onto the screw shaft 18 of the jack, respectively. A handle 20 is attached to the screw shaft 18 of the jack. When the handle is rotated in the forward or reverse direction, the left and right nut-shaped members 19 and 19 move in the directions toward and away from each other, and the jack expands and contracts vertically.
Therefore, the lower clamp 4 is moved up and down.

A pair of left and right sprockets 21 and 21 are provided on the base 17, and chains 22 and 22 connected to both ends of the upper clamp 3 are hooked on the sprockets 21 and 21.
The other end of this chain is connected to the lower clamp 4. Therefore, when the lower clamp 4 is raised by the jack 15, the upper clamp 3 is pulled down by the chains 22 and 22, and when the lower clamp 4 is lowered, the upper clamp 3 rises in the opposite direction. That is, by expanding and contracting the jack 15, the upper and lower clamps 3 and 4 can be moved in a direction toward each other or in a direction away from each other.
A combination of a pulley and a wire may be used instead of the combination of the sprocket and the chain.

The insertion tube support portions of the upper and lower clamps 3 and 4 are
Each has a structure as shown in FIG. That is, a hollow portion 30 is provided in the main body of the clamps 3 and 4, and a support frame 32 is housed in the hollow portion so as to be vertically movable. The lower surface of the support frame 32 is pressed outward by the springs 33, 33, and the pair of left and right rollers 35, 35 are rotatably supported by the shafts 36, 36 on the support frame in an inclined state in which the central side is lowered. Has been done. Therefore, a substantially V-shaped support surface is formed by these rollers.

The lower clamp 4 is provided with a pair of left and right rails 40, 40 extending above the starting table. The surfaces of the rails 40 facing each other, that is, the inner surfaces are formed as inclined surfaces, and the casters or the sleds of the propulsion force transmitting members attached to the insertion tube P move on the inclined surfaces. FIG. 6 shows a mounting structure of this rail. Groove-like frames 41 and 42 that open upward are provided in parallel with each other at intervals, and these frames 41 and 42 are provided downward at the base of the rail 40. The slide guides 43 and 44 protruding in the respective directions are slidably fitted. A slide guide 44 fitted to the rear frame 42
A threaded rod 45 is screwed into the screw. The threaded rod 45 has a left-handed and right-handed thread opposite to the center, and a handle 46 is provided at one end. This handle 46 is an interval adjustment handle for adjusting the rail interval, and by rotating this handle forward and backward,
The interval of 0 and 40 expands and contracts.

When the insertion tube supporting device 1 is used to propel the insertion tube into the sheath tube, as shown in FIG. 1, the insertion tube supporting device 1 is installed near the inlet of the sheath tube and the insertion tube P is moved up and down. With the jack 15 inserted between the clamps 3 and 4, the clamps 15 are moved toward each other.
The insertion tube is a roller 3 elastically supported by a spring.
Although elastically supported by 5, ..., Since the upper and lower rollers are provided so as to be inclined in a V shape having a concave central portion, centering of the insertion tube is simultaneously performed.

In this state, propulsion is performed by advancing the pressing member with a hydraulic jack. Since the rollers 35 supporting the insertion tube are rotatable, they support the insertion tube while rolling. Therefore, even when the pressing member C on the starting table B pushes the insertion tube P and moves backward, the insertion tube is supported by the clamps 3 and 4 and does not fall off.

On the other hand, when joining a joint with the preceding pipe, the insertion port of the next pipe is deposited in the receiving port of the preceding pipe, and the pressing member is pushed forward to push it in. When the bulging mouth of the roller hits the clamp part, the roller 3
5, gradually sinks into the groove-shaped recess of the clamp against the spring, and finally the non-rotating portion of the clamp (indicated by 3a in FIG. 5) directly supports the pipe. As a result, the pipe is fixed so that the joint can be joined.

At the time when the joining of the joints is completed, the caster of the propulsive force transmitting member of the next pipe is placed on the rails 40, 40, so that the pipe will not fall off. When the joining is completed and the propulsion is performed, the jack 15 is operated to widen the interval between the clamps 3 and 4, and the clamps 3 and 4 are passed through the receiving port having a large diameter. When the propulsion further progresses and the joint passes through the clamp, the clamps 3 and 4 are closed again to bring the rollers 35, ... The jack 15 in the illustrated example is
Although it is a manual jack and can be used for small and medium diameter pipes, when it is used for heavy pipes such as large diameter ductile pipes, hydraulic jacks may be used.

Further, since the intervals between the rails 40, 40 can be adjusted, the intervals may be adjusted according to the diameter of the pipe. This adjustment is easy because you only have to turn the handle. Instead of a manual type, the width may be adjusted by a hydraulic mechanism or the like. Since the rail 40 is fixed by the screw mechanism, the gap does not normally open even when a heavy pipe is placed, but a stopper is provided on the handle or rod to prevent the rail from being opened more reliably. You may do it.

Next, FIG. 8 shows an embodiment different from the above. In this embodiment, three rails 51, ... Are radially provided on the frame 50, and the propulsive force transmitting member of the insertion tube is provided on these rails. 100 casters 103 or sleds come into contact and move. Frame 5
The 0 and the rail 51 can be replaced with appropriate ones according to the dimensions of the insertion tube. Instead of such an exchange type, the rail 51 itself may be moved by a hydraulic mechanism or the like. Casters 53 on both sides of the rail 51
Supporting members 54, 54 are provided. The casters 53 are biased in the protruding direction by springs 55. The support member 54 having the casters 53 corresponds to the above-mentioned roller, and the support members 54 on both sides of the rail 51 are inclined in a substantially V shape.

The rail 51 is divided into three pieces, each of which is foldably connected by two hinges 58, 58. In addition, the rail 51 and the support member 5
The combination with 4, 54 is supported by a hydraulic cylinder 57, and the rail 51 is expanded and contracted by the expansion and contraction of the hydraulic cylinder.
Bends or becomes straight. Note that the three hydraulic cylinders are adapted to expand and contract in synchronization, as illustrated in FIG. 7. The tuning mechanism for extending and contracting the three hydraulic cylinders in synchronization with each other is not limited to the illustrated example, and may have another structure.

When the insertion tube is propelled using this insertion tube supporting device 1 ', as shown in FIGS. 10 to 12, the hydraulic cylinder 57 is extended and inserted by the casters 53 of the supporting member 54. Support the tube. The caster is pushed to the insertion tube side by the spring 55 and supports the tube while rolling. Even if the pressing member C on the starting table B pushes the insertion tube and moves backward, the insertion tube is supported by the casters 53, and does not fall off. The casters 53, ... Support the insertion tube and center the insertion tube.

On the other hand, when joining the joint, the insertion port S of the next pipe (subsequent pipe) is deposited in the receiving port U of the preceding pipe,
The pressing member is advanced and the insertion tube is pushed in. At this time,
When the receiving opening reaches the caster portion, the caster 53 sinks and the end of the bent rail 51 fixes the insertion tube (FIG. 13). In this state, the succeeding pipe is joined to the preceding pipe. After the joining is completed, the hydraulic cylinder 57 is contracted to pull in the caster to release the pipe, and the insertion is restarted.

Since the casters 103, ... Of the propulsive force transmitting member 100 for the next pipe are on the rails 40, ..., the pipe will not drop out even if the hydraulic cylinder 57 is contracted. When the propulsive force transmitting member of the next insertion tube reaches the inside of the sheath tube, the hydraulic cylinder 57 is extended again and the caster 5 is inserted.
Insertion is restarted with 3, ... supporting the insertion tube.

Since each of the insertion tube supporting devices 1 and 1'has a rotating body in which a member that also functions as a clamp for supporting the insertion tube is held by an elastic body, it must be compatible with the dimensional tolerance of the tube. You can The table that supports the insertion tube is
At the time of joining the pipes, the taper of the receiving port pushes the rotating body into the case, whereby the pipe is held and fixed by the fixing members such as blocks and rails provided around the rotating body. Therefore, unlike the conventional case, it is not necessary to attach a pipe support tool or a pipe fixing tool for joining joints, and the insertion tube can be fixedly supported only by the insertion work.

Further, even if the fixation of the pipe is released after the joining is completed, the caster of the propulsive force transmitting member of the next pipe is mounted on the rail of the supporting base, so that it is not necessary to re-support the pipe, and the work can be performed. The property is improved. Further, in the case of the conventional starting stand, a jig for supporting the insertion tube when the tube is pushed down and the pressing member C is retracted is necessary, but since this device always supports the insertion tube, There is no need to attach or remove such a jig. In the above embodiment, three rails have been described, but the number of casters is not limited to this, and it goes without saying that the number can be appropriately changed.

[0026]

As is apparent from the above description, the insertion tube supporting device for the sheath tube propulsion method according to the present invention can support the tube by the rotating body during the tube propulsion for smooth propulsion. At the same time, when joining the joints, it is possible to fix and hold the pipes as they are and to easily join them without the need to attach or detach jigs for supporting the pipes. It has become possible to construct efficiently.

[Brief description of drawings]

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

FIG. 2 is a side view of the insertion tube supporting device.

FIG. 3 is a front view of the insertion tube supporting device.

FIG. 4 is an open state (a) and a closed state (b) of the clamp.
It is a front view showing.

FIG. 5 is a front sectional view (a) and a side sectional view (b) of a roller supporting portion.

FIG. 6 is a plan view (a), a view on arrow B (b), and a view on arrow AA (c) of the rail.

FIG. 7 is an explanatory diagram of a hydraulic cylinder tuning mechanism.

FIG. 8 is a side view showing an embodiment different from the above.

FIG. 9 is a front view thereof.

FIG. 10 is a side view showing a pipe fixed state.

FIG. 11 is a front view thereof.

FIG. 12 is a side view when joining the joints.

FIG. 13 is a side view during the propulsion.

FIG. 14 is an explanatory diagram of a conventional propulsion method.

FIG. 15 is an explanatory diagram of a conventional socket supporting method.

[Explanation of symbols]

1 Insertion tube support device 2 frames 3 Upper clamp 4 Lower clamp 7 Sprocket (pulley) 10 chain (wire) 15 jacks 20 handles 33 spring 35 Laura 40 rails 50 frames 51 rails 53 casters 55 spring 57 hydraulic cylinder

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoki Tomita             1-12-19 Kitahorie, Nishi-ku, Osaka City, Osaka Prefecture             Kurimoto Iron Works Co., Ltd. (72) Inventor Yoshinori Yoshida             1-12-19 Kitahorie, Nishi-ku, Osaka City, Osaka Prefecture             Kurimoto Iron Works Co., Ltd. F term (reference) 2D054 AC18 AD32

Claims (4)

[Claims] 1. An insertion tube supporting device for a sheath tube propulsion construction method for propelling an insertion tube while joining the insertion tube into the sheath tube, wherein the insertion tube supporting device elastically abuts an outer peripheral portion of a preceding insertion tube to support the insertion tube. A sheath tube comprising: a clamp device having a plurality of rotating bodies; a jack for moving the clamp device in the radial direction of the insertion tube; and a plurality of rails through which casters or sleds attached to the insertion tube pass. Insertion tube support device for propulsion method. 2. A pair of rollers, which are rotatably supported in a space provided in the clamp device in a substantially V-shaped manner and are urged outward by a spring, are provided as a rotating body for supporting the insertion tube. The insertion tube supporting device for the sheath tube propulsion method according to claim 1. 3. The insertion tube supporting device for a sheath tube propulsion method according to claim 1, wherein the rail is movable in accordance with a position of a caster or a sled attached to the insertion tube. 4. The clamp device is provided with a pair of casters urged outward by a spring as a rotating body supporting the insertion tube, and the clamp device and the rail are integrated. Insertion tube support device for the nose tube propulsion method.