JP3396665B2 - Propulsion device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion device used for inserting an insertion pipe into the ground by press fitting and laying a sewer pipe or other pipe in the ground.

[0002]

13 and 14 show an example of an apparatus for carrying out a conventional press-fitting propulsion method. The original pushing device 1 constituting the propulsion device of FIGS. 13 and 14 has a fixed mount 4 provided with guide rails 3 extending in the propulsion direction forward and backward in parallel to the left and right at the bottom of a starting shaft 2 excavated in the ground. A tip of a rod 6 of a propulsion jack 5 having a required expansion / contraction stroke is attached to a reaction force receiving frame 4a of the fixed mount 4 by a pin 7. Further, a pressing plate 9 movable along the guide rail 3 by the traveling wheel 8 is provided, and the pressing plate 9 is provided with a fitting hole 10 into which the propulsion jack 5 is fitted. The propelling jack 5 and the pressing plate 9 can be moved relative to each other in a state in which 5 is held horizontally.

On the outer periphery of the end (right side end) of the propulsion jack 5 on the rod 6 side, there is formed a convex portion 11 that abuts the rear surface (right side surface) of the pressing plate 9, and the tip of the propulsion jack 5 is formed. A vertical pin hole 12 is provided on the (left end), and a pin hole 13 that matches the pin hole 12 is also provided on the pressing plate 9. The pressing plate 9 can be connected to the front end of the propulsion jack 5 by inserting the engagement pin 14 in a state where the pin hole 12 of the jack 5 is aligned with the pin hole 12. Reference numeral 15 in the drawing is an insertion pipe, and the insertion pipe 15 is a front end (left side) of the pressing plate 9 and a tip device (not shown) already inserted into the ground or another insertion by a suspension device 16 such as a crane. It is hung from the rear end of the pipe 15.

In the above propulsion device, first, the propulsion jack 5
Initial position A when the pressure plate 9 is retracted to the end by reducing
In the state shown by the solid lines in FIGS. 13 and 14, the tip device (not shown) or the insertion tube 15 is suspended and installed on the front side of the pressing plate 9. Then, when the propulsion jack 5 is extended to the pushing end (stroke end), the pressing plate 9 is pushed to the refilling position B by the convex portion 11 of the propulsion jack 5, and the tip of the insertion tube 15 is pressed into the ground.

Next, the propelling jack 5 is reduced in size, and when the pin hole 12 at the tip of the propelling jack 5 coincides with the pin hole 13 of the pressing plate 9 at the relocation position B, the engaging pin 1 is fitted into the pin holes 13 and 12.
4 is inserted and the propulsion jack 5 and the pressing plate 9 are connected (replacement work). Then, when the propelling jack 5 is extended again to the pushing end (stroke end), the engaging pin 1
The pressing plate 9 connected at 4 is pushed to the position C, so that the pressing plate 9 moves by a distance about twice the stroke of the propulsion jack 5, and the insertion pipe 15 is pressed into the ground for almost the entire length. Thus, the press fitting of the single insertion tube 15 is completed.

Next, the pushing jack 5 is contracted to the stroke end to move the pressing plate 9 from the position C to the repositioning position B, and then the engaging pin 14 is pulled out to separate the pushing jack 5 and the pressing plate 9. Release the connection. Subsequently, the operator manually moves the pressing plate 9 at the refill position B to the initial position A shown by the solid line, presses the next insertion tube 15 in the same manner as described above, and repeats the above operation. , Form a conduit in the ground.

[0007]

However, FIG. 13 and FIG.
In the conventional source pusher 1 shown in FIG. 4, the insertion pipe 15 is hung from the starting shaft 2 and the insertion pipe 15 is added to the front insertion pipe 15 or the like. Operation of removing and inserting the engaging pin 14 for moving instead of
All the operations such as adjusting the expansion and contraction of the propulsion jack 5 so that the pin holes 12 and 13 are aligned for the insertion and removal of the engagement pin 14 are manually performed while an operator enters the starting shaft 2 and visually checks them. Therefore, there is a problem that the work efficiency is poor, and that there is a problem that the work in the starting shaft under bad environmental conditions is forced.

The present invention has been made to solve the above conventional problems, and provides a propulsion device capable of efficiently performing a propulsion operation by a former push device by remote control from the outside of a starting shaft. The purpose is to do.

[0009]

SUMMARY OF THE INVENTION The present invention is a propulsion device for advancing a tip device into the ground through an insertion tube by means of an extruding device provided in the starting shaft, which is provided in the starting shaft. However, at the bottom of the starting shaft, fixed pedestals provided with guide rails extending in the propulsion direction forward and backward at the required intervals on the left and right, and at the respective upper portions of the guide rails, the rear end of the rod is connected to the rear portion of the fixed pedestal, A cylinder provided with a cylinder cylinder having fins having recesses formed at the front end and the rear end, and a propulsion jack having traveling wheels traveling on the guide rails at the front end of the cylinder cylinder, and a cylinder provided with fins. A pusher equipped with a running wheel that has an opening through which the cylinder can penetrate at a right angle, has a built-in engagement pin that projects into the opening by a drive device and can be inserted into and removed from the recess of the fin, and that travels on the guide rail. A plate, provided at the front and rear of the propulsion jacks, front and rear stopper for positioning the contact with the pressing plate to the pressing plate when a recess provided in the front end and the rear end portion of the fin matches the position of the engagement pin , it is composed of, further in the starting pit, and supports the insertion tube, provided with a positioning means defining the vertical and lateral position of the insertion pipe, the positioning instrumentation
The device can be stored in a position where it does not interfere with the pressing plate,
Insert the insertion pipe into the ground by remote control from the outside of the mine.
Those of the propulsion device, characterized in that that.

In the above means, the positioning device may be a guide roller that is vertically movable at the lower part of the fixed mount and receives the insertion tube suspended by the suspension device and positions the insertion tube.

The present invention operates as follows.

When the insertion tube is suspended from the ground to the original pushing device portion inside the starting shaft, the positioning device automatically positions the left, right, up and down positions of the insertion pipe with respect to the original pushing device. Further, by the front and rear stoppers provided at the required positions of the propulsion jack, the positions of the recesses provided at the front and rear ends of the fins and the engaging pins are surely aligned when the propulsion jack is maximally extended and minimally contracted. . Further, the engagement pin is retracted and retracted by the drive device. Therefore, all operations of positioning the insertion tube, positioning the relative position of the propulsion jack and the pressing plate during the reshuffling work, retracting the engaging pin, and moving the pressing plate by expanding and contracting the telescopic jack can be controlled from the ground. Therefore, it is possible to efficiently and safely perform the laying work of the pipeline by remote control from the ground without the worker entering the start shaft.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 11 show an example of the form of an extruding device provided in the starting shaft of the propulsion device of the present invention. In FIGS. 1 to 4, reference numeral 24 denotes a starting shaft formed in the ground by a concrete frame 25 so as to install the former pushing device 59. At the inner bottom of the starting shaft 24, a frame is formed in a box shape. A fixed mount 26 is installed. A sliding plate 27 made of synthetic resin or the like is provided at the bottom of the fixed base 26 for slipping and positioning, and the fixed base 26 is further provided with overhanging legs 28 of an outrigger structure provided on the left and right front and back. It is positioned and fixed to the concrete frame 25.

On the lower frame 26a of the fixed mount 26, two guide rails 29, 29 extending horizontally in the front-rear direction in the starting shaft 24 are provided in parallel with each other in the left and right directions.

A propulsion jack 30 is arranged above each of the guide rails 29, 29, and a rear end of a rod 31 of the propulsion jack 30 is connected to a reaction force receiving frame 26b at a rear portion of the fixed mount 26. They are connected via 32. As shown in FIG. 5 and FIG. 6, thick fins 34 having a required width are integrally formed above and below the outer surface of the cylinder cylinder 33 of each propulsion jack 30 over substantially the entire length of the cylinder cylinder 33. Moreover, recesses 34a and 34b are formed at the positions of the front and rear ends of the upper and lower fins 34, respectively. The distance between the front concave portion 34a and the rear concave portion 34b is slightly shorter than the expansion / contraction stroke of the propulsion jack 30. Further, below the front end portion of the propulsion jack 30, traveling wheels 35 traveling on the guide rail 29 via a bracket 35a are provided. In addition, on the upper side of the front end of the propulsion jack 30, the fixed mount 26
A guide member 35b that is movable along a guide member 29a provided on the upper frame 26c on the upper side of is provided.

As shown in FIGS. 1 and 5, the connecting portion 32 has a hemispherical portion 3 through a ring groove 36 at the rear end of the rod 31.
7 is formed, and has a structure in which a split fixing plate 38 that fits in the ring groove 36 is fixed to the reaction force receiving frame 26b of the fixed mount 26. With this structure, the propulsion jack 30 is fixed to the reaction force receiving frame 2 of the fixed base without unnecessarily increasing the front-rear length of the propulsion jack 30.
6b can be connected.

Further, as shown in FIGS. 4 and 7, on the guide rail 29, a thick pressing plate 40 having an opening 39 through which the left and right propulsion jacks 30 having the fins 34 can penetrate at a right angle. Are arranged, and the pressing plate 40 is
It is supported by traveling wheels 41 so that it can travel on the guide rail 29.

Further, at the position of the opening 39 of the pressing plate 40, as shown in FIGS. 1, 2 and 7, there is provided an engaging pin 42 which is built in the pressing plate 40 and can be extended and retracted with respect to the opening 39. When the recesses 34a, 34b of the fins 34 of the propulsion jack 30 come to the position of the opening 39, the opening 39 is provided.
By engaging the engaging pin 42 with the concave portion 34a, 34b, the cylinder cylinder 33 of the propulsion jack 30
And the pressing plate 40 can be integrally connected.

The engagement pin 42 has the recesses 34a, 3a.
When it is fitted to 4b, it is hidden in the guide groove 43,
When the fitting with the recesses 34a and 34b is released and the pressing plate 40 is moved inward in the left-right direction, the guide groove 43 can be moved to the exposed portion. A pin arm 44 fixed to the engaging pin 42 is provided at an exposed portion of the guide groove 43, and the pin arm 44 is driven by a driving device 45 including an expansion jack 30 provided on the rear surface of the pressing plate 40 in parallel with the guide groove 43. By pushing and pulling, the engaging pin 42 can be moved to a position where it is fitted into the recesses 34a and 34b of the fin 34 and a position where the fitting is released. Reference numeral 46 in the figure denotes a connecting member that connects the upper and lower pin arms 44 so that the upper and lower engaging pins 42 move simultaneously.

At the front end of the fixed mount 26, a tip device (not shown) and a V-shaped support roller 47 that supports the insertion tube 15 from the lower part so that the position thereof can be adjusted, and the upper and lower sides of the support roller 47. An up-down adjustment base 49 whose position can be adjusted by a screw 48 is provided. In addition, the support roller 47
At the front wall of the starting shaft 24 at the position where is provided the insertion port S for inserting the tip device or the insertion tube 15 into the ground.
Are formed.

As shown in FIGS. 1 and 7, the propelling jack 30 is pushed at a required position so that the engaging pin 42 of the pushing plate 40 and the recesses 34a and 34b of the fin 34 are aligned with each other. Front and rear stoppers 50 and 51 for positioning the plate 40 are provided.

That is, the pressing plate 4 is provided on the bracket 35a and the guide member 35b provided on the front side of the propulsion jack 30 when the engaging pin 42 is aligned with the front concave portion 34a.
0 is fixed to the front side stopper 50 so that the front surface of the push pin 4 is in contact with the front side of the pushing jack 4.
The stopper 51 is fixed so that the rear surface of 0 abuts.

Further, FIGS. 10 and 11 are schematic views for explaining the operation of the propulsion jack 30 and the pressing plate 40 in a simplified manner. Detectors 52 and 53 for detecting that the pressing plate 40 is in contact with 51 are arranged. The detectors 52 and 53 include a contact type switch such as a limit switch, a proximity switch using light, magnetism or the like, and a pressing plate 40 for a cord fed from a reel attached to the propulsion jack 30. It is possible to employ various methods such as a method in which the position of the pressing plate 40 is detected from the extension length of the cord-like member by fixing it to the.

As shown in FIGS. 8 and 9 for example, the insertion shaft 15 is supported in the starting shaft 24 so that the vertical and horizontal positions of the insertion pipe 15 with respect to the original pushing device 59 are defined. The positioning device 60 described above is provided.

In this positioning device 60, a lower frame 26a of the fixed mount 26 is provided with a lower pedestal 61, which is undulated by a driving device (not shown), with a predetermined space in front and back, and each lower part. A guide roller 62 inclined in a V shape is attached to the pedestal 61. Then, when the lower pedestal 61 is erected, the guide tube 62 receives the insertion tube 15 suspended by the various suspension devices 16 so that the position of the insertion tube 15 in the left-right direction and the vertical direction with respect to the original pushing device 59. So that it can be positioned.
8 and 9, a case where the lower pedestal 61 is ups and downs is illustrated, but the lower pedestal 61 having the guide roller 62 on the upper part may be configured to be moved up and down.

10 and 11 show an example of the suspension device 16. As shown in the drawing, it has two split structures on the left and right sides, and is provided with clamp blocks 64 and 65 that are configured to approach and separate by the drive motor 63 to clamp and unclamp the insertion tube 15. 15
The hanging device 16 having the longitudinal middle portion thereof clamped is hung by the hanging wire 66 on the guide roller 62.

The engagement and disengagement of the engagement pin 42 by the drive unit 45, the expansion and contraction of the propulsion jack 30, and the ups and downs of the lower pedestal 61 of the positioning unit 60 can be performed remotely by a control unit (not shown) on the ground via the control cable 58. It has become.

Next, the operation of the above embodiment will be described.

To lay a pipeline in the ground, first,
As shown in FIG. 4, the starting shaft 24 is excavated to construct the concrete skeleton 25, and the original pushing device 59 is installed inside the constructed starting shaft 24.

1 and 12 (a) show the propulsion jack 3
In the state in which 0 is reduced, the engaging pin 42 provided on the pressing plate 40 is fitted in the rear concave portion 34b formed in the fin 34 of the cylinder tube 33, and the pressing plate 40 is the rearmost part. It is located at the initial position A waiting for the position.

In this state, the lower pedestal 61 of the positioning device 60 shown in FIG. 8 and FIG.
2 is lifted, the insertion tube 15 is grasped by the suspension device 16 shown in FIGS. 10 and 11 and is suspended in the starting shaft 24, and placed on the guide roller 62 of the positioning device 60. Then,
The insertion tube 15 is positioned at the left, right, up and down positions with respect to the original pushing device 59 by the guide of the guide roller 62.

Next, when the propulsion jack 30 is extended to the stroke end, the pressing plate 40 advances to the repositioning position B (FIG. 12 (b)), and the insertion tube 15 is pushed at its rear end by the pressing plate 40. The tip of the insertion tube 15 is connected to the rear part of the insertion tube 15 which has already been inserted into the ground, and is pushed into the ground. Subsequently, the driving device 45 retracts the engagement pin 42 into the pressing plate 40 to release the connection between the propulsion jack 30 and the pressing plate 40 (FIG. 12C). Next, the propulsion jack 30 is reduced to the stroke end (FIG. 12 (d)). At this time, the engaging pin 4 of the pressing plate 40
With respect to 2, when the concave portion 34a on the front side of the fin 34 is aligned, the stopper 50 on the front side contacts the front surface of the pressing plate 40. When the stopper 50 on the front side and the front surface of the pressing plate 40 come into contact with each other, the contact is gently performed.
It is preferable to slow down the reduction operation at the stroke end of the propulsion jack 30. It is detected by the front detector 52 that the stopper 50 comes into contact with the front surface of the pressing plate 40 and the positions of the engaging pin 42 and the front concave portion 34a are aligned with each other. Next, the propulsion jack 30 is further reduced by a slight distance X, so that the stopper 50 is reliably brought into contact with the front surface of the pressing plate 40 (FIG. 12 (e)). At this time, the expansion / contraction stroke of the propulsion jack 30 is set to the front and rear recesses 34a, 34
Since the distance b is set to be slightly larger than the mutual distance, it is possible to perform an operation in which the stopper 50 is reliably brought into contact with the front surface of the pressing plate 40 by further reducing the distance X. As described above, since the positions of the engagement pin 42 and the front concave portion 34a are surely aligned with each other, the engagement pin 42 is extended and fitted into the front concave portion 34a to connect the propelling jack 30 and the pressing plate 40 ( FIG. 12F). As a result, the work of rearranging the pressing plate 40 is completed.

Then, when the propelling jack 30 is extended to the stroke end again, the pressing plate 40 advances to the position C, and the rear end of the insertion tube 15 is pressed by the pressing plate 40, and the insertion tube 15 is pushed into the ground for substantially the entire length. (Fig. 12
(G)). This completes the press-fitting of one insertion tube 15.

Next, the propulsion jack 30 is reduced to the stroke end (FIG. 12 (h)), and the pressing plate 40 is retracted to the rearrangement position B (FIG. 12 (i)). Subsequently, the driving device 45 retracts the engagement pin 42 into the pressing plate 40 to release the connection between the propulsion jack 30 and the pressing plate 40 (FIG. 12 (j)). Next, the propulsion jack 30 is extended to the stroke end (FIG. 12 (k)). At this time,
The rear stopper 51 abuts the rear surface of the pressing plate 40 when the recess 34b on the rear side of the fin 34 is aligned with the engagement pin 42 of the pressing plate 40. When the rear stopper 51 and the rear surface of the pressing plate 40 come into contact with each other, it is preferable to slow down the extension operation at the stroke end of the propulsion jack 30 so that the contact is made gently.
The contact of the stopper 51 with the rear surface of the pressing plate 40 is detected by the rear detector 53. Next, by extending the propulsion jack 30 by a slight distance X, the stopper 51 is surely brought into contact with the rear surface of the pressing plate 40 (see FIG. 1).
2 (l)).

Due to the above, the engaging pin 42 and the rear concave portion 3 are formed.
Since the positions of 4b are surely matched with each other, the engaging pin 42 is extended and fitted into the front concave portion 34b to connect the propulsion jack 30 and the pressing plate 40, whereby the pressing plate 40 is rearranged. Ends (FIG. 12 (m)).

Subsequently, when the propelling jack 30 is contracted to the stroke end (FIG. 12 (n)), the pressing plate 40 retracts to the initial position A and returns to the state of FIG. 12 (a). After that, by repeating the above operation, the insertion pipe 15 is pushed in order to lay a conduit in the ground.

According to the above-described propulsion device, the insertion tube 15 can be positioned vertically and horizontally by merely placing the insertion tube 15 on the guide roller 62 of the positioning device 60.
Moreover, the engagement pin 42 is retracted and retracted by the drive device 45 while the positions of the engagement pin 42 and the recesses 34a, 34b are surely aligned by the front and rear stoppers 50, 51, and the pressing plate 40 is expanded and contracted by the expansion and contraction of the propulsion jack 30. The movement can be performed by a control device on the ground via the control cable 58 or the like, and therefore, the insertion pipe 15 can be safely pushed in remotely without an operator entering the starting shaft 24. You can
Although the operation of pushing the insertion tube 15 has been described above, the pushing operation of the distal end device (not shown) which performs the pushing operation first can be performed remotely in the same manner.

Further, the propulsion jack 30 includes the cylinder tube 3
Since the thick fins 34 are provided on the cylinder 3, the bending strength of the cylinder tube 33 can be increased.

In the above description, the case where the insertion tube 15 is a circular tube has been described, but even when the insertion tube 15 has a two-split structure, the suspension device 16 separates the two split members separately. If the suspending device 16 is provided with a structure in which the pipes are formed by fitting the two split members after supporting and positioning by the positioning device 60, the same can be applied.

The present invention is not limited to the above embodiment, but the shape of the pressing plate, the driving method of the driving device for driving the engaging pins to project and retract, the shape of the stopper and its position, and the positioning device. The configuration of can be changed in various ways,
It goes without saying that other various changes can be made without departing from the scope of the present invention.

[0042]

According to the present invention, when the insertion pipe is suspended from the ground to the original pushing device portion inside the starting shaft, the positioning device automatically positions the left, right, up and down positions of the insertion pipe with respect to the original pushing device. Also, the front and rear stoppers provided at the required position of the propulsion jack ensure that the positions of the engagement pins match the recesses provided at the front and rear ends of the fin when the propulsion jack is maximally extended and contracted minimum. Further, since the engaging pin is projected and retracted by the drive device, positioning of the insertion tube, positioning of the relative position between the propulsion jack and the pressing plate at the time of the refilling work, and projection and withdrawal of the engaging pin. All operations of the movement of the pressing plate due to the expansion and contraction of the telescopic jack can be controlled from the ground, so that the operation of the pipeline can be performed remotely from the ground without an operator entering the start shaft.設作 industry there is an effect that can be carried out efficiently and safely.

[Brief description of drawings]

FIG. 1 is a side view showing an example of the form of an original pushing device in a propulsion device of the present invention.

FIG. 2 is a view taken along the line II-II in FIG.

3 is a III-III direction arrow view of FIG. 1. FIG.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a side view of the propulsion jack.

6 is a VI-VI direction arrow view of FIG.

FIG. 7 is an enlarged arrow view in the VII-VII direction of FIG.

FIG. 8 is a side view showing an example of a positioning device.

9 is a front view of FIG. 8. FIG.

FIG. 10 is a side view showing an example of a suspension device.

11 is a front view of FIG.

FIG. 12 is a schematic view for explaining an operating procedure in which the propulsion jack and the pressing plate of the present invention are shown in a simplified manner.

FIG. 13 is a side view showing an example of a conventional propulsion device that performs a refill operation.

FIG. 14 is a plan view of FIG.

[Explanation of symbols]

24 starting shaft 26 Fixed stand 29 Guide rail 30 propulsion jack 31 rod 33 cylinder tube 34 fins 34a recess 34b recess 35 running wheels 39 openings 40 pressure plate 41 running wheels 42 Engagement pin 45 Drive 50 stopper 51 stopper 59 original pusher 60 Positioning device 62 guide roller

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takayuki Yoshikawa 11-1 Kitahama-cho, Chita-shi, Aichi Ishikawajima Harima Heavy Industries, Ltd. Aichi factory (72) Minor Tanaka 2-3-3 Otemachi, Chiyoda-ku, Tokyo No. 1 Inside Nippon Telegraph and Telephone Corporation (72) Inventor Toshihiko Takanashi 2-3-3 Otemachi, Chiyoda-ku, Tokyo No. 1 Inside Nippon Telegraph and Telephone Corporation (72) Hidenori Hino 2-3-3 Otemachi, Chiyoda-ku, Tokyo No. 1 in Nippon Telegraph and Telephone Corporation (56) Reference JP 2000-54787 (JP, A) JP 10-2194 (JP, A) JP 7-139289 (JP, A) JP 2000-45688 (JP, A) J. Kohei 4-47278 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/06 311

Claims (2)

(57) [Claims] 1. A propulsion device for advancing a tip device into the ground through an insertion tube by means of an extruding device provided in the starting shaft, wherein the extruding device provided in the starting shaft is propelled at the bottom of the starting shaft. Fixed bases provided with guide rails extending forward and backward in the left and right directions at required intervals, and the rear end of the rod is connected to the rear part of the fixed base at the upper part of each of the guide rails, and the front end part and the rear end part are connected. A cylinder tube having a fin with a recess formed in
The front end of the cylinder cylinder has a propulsion jack having traveling wheels that travel on the guide rail, and an opening through which the cylinder cylinder having fins can penetrate at a right angle. connecting or disconnecting incorporates a possible engagement pin, and the pressing plate and provided with running wheels which travel on the guide rail, provided on the front and rear portions of the propulsion jacks, provided in the front end and the rear end portion of the fin And a stopper before and after positioning the pressing plate by abutting against the pressing plate when the recess coincides with the position of the engaging pin, and further supports the insertion pipe in the starting shaft and inserts the insertion pipe. It comprises a positioning means defining the vertical and horizontal position of the tube, the positioning
The device can be stored in a position where it does not interfere with the pressing plate, and the insertion pipe is advanced into the ground by remote control from the outside of the starting shaft.
A propulsion device characterized by being inserted . 2. The positioning device is a guide roller that is vertically movable at a lower portion of the fixed mount and receives the insertion tube suspended by the suspension device and positions the insertion tube. 1. The propulsion device according to 1.