JPH074592U - Hydraulic small underground piping system - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To reduce the size and weight of an underground piping device that pushes a hard vinyl chloride buried pipe into the ground by pushing multiple times. A first and second lock portions alternately repeat locking and unlocking, and a cylinder and a cylinder rod are alternately propelled or retracted, whereby the first slider and the second slider alternately move and stop. When one of them is fixed to the rails 11 and 12, the other is movable relative to the rail, and conversely when the other is movable relative to the rail, the other is relative to the rail. Fixed. The pushing table 19 rotates the screw rod 6 to excavate the soil, and the pushing table pushes the buried pipe 7 into the ground. Next, the embedded pipe and the screw are separated from the pusher table, the pusher table is retracted along the rail, a new buried pipe and a screw rod are added, and the other end is connected to the pusher table.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic small underground piping device which is disposed in a starting shaft and which pushes while adding a buried pipe while forming a lateral hole in the ground from the starting shaft to the reaching shaft.

[0002]

[Prior art]

 As shown in Japanese Patent Publication No. 61-44198, the structure of the conventional underground piping device is a device for excavating the ground or the ground surface to carry out the earth and sand, and the push-in base of the buried pipe can slide on the rail. It is provided in. In addition, screw-shaped screw blades are connected to the outer circumference of the screw rod having the leading cutter, the screw rod is inserted into the buried pipe, and the leading cutter moves forward while excavating the ground by rotating the screw rod. The earth and sand are gradually transported to the front and discharged. Therefore, the buried pipe and the screw rod can be pressed into the ground all at once, so that the buried pipe can be piped while forming a hole in the ground.

[0003]

[Problems to be solved by the device]

 However, since the hard vinyl chloride pipe must be pushed in by one push, the length of the propulsion cylinder and propulsion cylinder rod becomes long, the whole underground piping device becomes large and heavy, and the underground piping device is installed. There were some points to be improved, such as the diameter and length of the starting shaft becoming larger and the construction work range becoming larger.

Therefore, an object of the present invention is to downsize and lighten the underground piping device, and to reduce the diameter and length of the starting shaft to narrow the construction range.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention provides a rail, a first slider for moving a cylinder along the rail, a second slider for moving a cylinder rod along the rail, and a first slider for fixing the first slider to the rail. A lock unit, a second lock unit that can fix the second slider to the rail, a control unit that can control the oil flow in the cylinder, and a rail that is moved by the first slider or the second slider. And a screw rod that can be separably connected to the push table so that it can be placed in front of the push table and can be separably connected to each other and can be rotated by the push table, and the embedding in which the screw rod is inserted. A holding part that allows the pipe to be detachably connected to the push-in table and a leading cutter that can be connected to the screw rod are provided so that the embedded pipes can be connected The structure is intended to summarized as hydraulic small underground piping system which is characterized by comprising reducing the length of one step of the cylinder and the cylinder rod than the pipe length of the buried pipe.

[0006]

[Action]

 According to the present invention, the length of one step of the cylinder and the cylinder rod is made smaller than the pipe length of the buried pipe, and by alternately locking and unlocking the first lock part and the second lock part a plurality of times. One step of the cylinder and the cylinder rod is repeated to alternately propel or retract the cylinder and the cylinder rod, thereby alternately moving and stopping the first slider and the second slider. When one of them is fixed to the rail, the other is movable relative to the rail, and conversely when one of them is movable relative to the rail, the other is It will be fixed to the rail. Therefore, the cylinder and the cylinder rod move like a so-called “shokuzoku” movement, and the pusher rotates the screw rod to excavate the soil, while the pusher pushes the buried pipe into the ground. Next, the buried pipe and the screw are separated from the pusher, the pusher is retracted along the rail, and a new buried pipe and screw rod are inserted into the buried pipe and screw rod buried in the ground. The other end is also connected to the push-in base. By repeating the pushing, separating, retracting, and connecting in this manner, a plurality of buried pipes can be connected and piped underground. Therefore, the length of the cylinder and the cylinder rod is greatly shortened, and the hydraulic small underground piping system becomes extremely small.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The underground propulsion method includes a two-step method requiring the accuracy of 1A on the left side of FIG. 1 and a one-step method of 1B on the right side of FIG. In the practical example, the two-step construction method is applied, but it goes without saying that it can also be applied to the one-step construction method. In the two-step method, the lead hole is formed by the lead tube, then the lead cutter is attached to the lead tube, and the screw rod and the buried tube are pushed in.The one-step method, the screw rod and the buried tube are installed without the lead tube. It is attached and pushed in.

The hydraulic small-sized underground piping device 1 of the embodiment is a vertical 1. It is a very small and lightweight device measuring 25 meters, 1 meter wide, and weighing 750 kilograms. The hydraulic small underground piping system 1 can be installed at the bottom of a small vertical shaft around which a circular liner plate with a diameter of about 2 meters is installed, and lateral excavation can be performed from there. Next, as shown in FIG. 2, the hydraulic small underground piping device 1 includes a propulsion device main body 2, a hydraulic unit 3 for generating hydraulic pressure, a water pressure generating device 4, a directional control transit 5, and rotating soil. A screw rod 6 with spiral wings for moving to the starting shaft and provided with connecting screw parts at both ends, made of hard vinyl chloride with a nominal diameter of 150-350 mm and a length of 800 mm. The embedded pipe 7 provided with a screw part for connecting the above, the leading cutter 8 for excavating the soil, the speeder head 9 attached to the leading end, the screw rod 6 and the embedded pipe 7 can be attached and detached, and the screw rod 6 can be rotated. While being pushed into the ground while being pushed, the pushing pipe 19 is pushed in without rotating the buried pipe 7. In the construction of the first step, the lead tube is pushed in and the course is set in advance, and in the construction of the second step, the screw rod 6 as shown in FIG. 2 is connected to the lead tube. The propulsion unit main body 2 includes a base assembly 10, two rails 11 and 12 fixed to both sides of an upper portion of the base assembly 10, a pair of front sliders 13 and 14 traveling on the rails 11 and 12, and a front surface. A rear slider 15 that is driven in pairs with the sliders 13 and 14 (the rear slider on the opposite side in the drawing is shaded and not visible in the drawing and is not numbered), a hydraulic unit 16 that supplies hydraulic pressure, and a buried unit. It comprises a buried pipe push plate set 17 capable of connecting or disconnecting the pipe 7, and a buried pipe holding guide ring 18 for supporting the buried pipe. Since the auger excavation method is used, it can be used for various soils such as sand, gravel, silt, and clay by using a water-stop head and core cutter.

Next, the front slider 13 and the rear slider 15 will be described with reference to FIGS. 3 to 6. As shown by the arrow A in FIGS. 3 and 4, they are movable in the front-rear direction along the rails 11, and the shape thereof is box-shaped, and the upper surface and the inner side surface are open, and the front slider 13 and When the rare slider 15 approaches, the outer boundary line looks substantially M-shaped when viewed from the front (FIG. 2). Then, the propulsion cylinder 20 is fixed to the center of the inner wall surface of the front slider 13, and the cylinder head 22 of the propulsion cylinder rod 21 is fixed to the center of the inner wall surface of the rear slider 15 (FIGS. 3 and 4). As is clear from the figure, one step of the propulsion cylinder 20 and the propulsion cylinder rod 21 (the distance that the propulsion cylinder rod 21 moves from one end to the other end of the propulsion cylinder 20) is approximately four quarters of the length of the buried pipe 7. It's number one. Naturally, the length ratio is not limited to one quarter, and it is sufficient that the one step is smaller than the pipe length of the buried pipe 7. The front slider 13 and the rear slider 15 are configured so that when one of them moves, the other one stops so that they are alternately moved in order. That is, the front slider 13 and the rear slider 15 are repeatedly separated and approached, and the buried pipe 7 is intermittently advanced by performing a propulsion or a retreat similar to the operation of a "measurement insect". Thus, the pressure oil is supplied to the propulsion cylinder 20 so that the propulsion cylinder 20 moves away from the propulsion cylinder rod 21 to the maximum distance, and the front slider 13 and the rear slider 15 operate so as to be apart from each other by the maximum distance, or The pressure oil is discharged from the cylinder 20, and the front slider 13 and the rear slider 15 are brought into close contact with each other until the distance becomes the minimum. Further, when the front slider 13 and the rear slider 15 are close to each other, the combined length thereof is about 30% of the length of the rail 11, so that the size of the cylinder portion is extremely smaller than that of the conventional device. As a result, the entire device is downsized. In this embodiment, the two do not come into contact with each other even when they are close to each other, and there is a small gap.

Next, the connection between the front sliders 13 and 14 and the push-in base 19 will be described with reference to FIG. A plurality of screw holes 24 are provided in the mounting portion 23 extending from the front slider 13 in a plate shape, a hexagon bolt 25 is screwed into the hole 24, and further screwed into a screw hole (not shown) of the pusher base 19. As a result, the front slider 13 and the push-in base 19 are connected. Similarly, the front slider 14 is also connected to the push-in base 19, and the front sliders 13 and 14 support the push-in base 19 from both sides, so that these can be integrally moved. Note that the front slider 14 and the rear slider 15 on the opposite side of the push base 19 are only symmetrically arranged, and the front slider 13 and the rear slider 15 have exactly the same structure and operation, and therefore are explained. Is omitted.

Next, the relationship between the front slider 13, the rear slider 15, and the rail 11 will be described with reference to FIGS. 3 to 8. The front slider 13 is fixed to the rail 11 by hooking a hook 27 with a handle 26, while the front slider 13 can be propelled on the rail 11 by releasing the hook 27. This is for fixing the front slider 13 and propulsion alternately and downsizing the propulsion cylinder 20 and the propulsion cylinder rod 21. FIG. 3 shows a state in which the hook 27 is hooked. The upper end of the hook 27 is fixed to the outer wall of the front slider 13 by a hexagon bolt 28a and a hexagon nut 28b shown in FIG. 6 so as to be rotatable about 145 degrees clockwise or counterclockwise (arrow B in FIG. 3). The curved inner portion of the lower end of the hook 27 is hooked on the hook bolt 30. In such a state, the continuous tooth 32 provided at the left end of the lock 31 connected to the latch bolt 30 of FIG. 5 engages with the continuous tooth 11a provided on the side surface of the rail 11, and the front slider 13 is Movement is blocked and it is impossible to move on rail 11. Here, the latch bolt 30, the connecting teeth 32, and the lock 31 are taken out and shown separately in FIG. 8, and the lock 31 has a measuring rack 31a and a spacer 31b by means of hexagon socket head bolts 31c and 31d. It is configured by being connected. The take-up rack 31a is provided with continuous teeth 32, and the retaining bolt 30 is screwed and fixed to the spacer 31b.

On the other hand, returning to FIG. 3, when the handle 26 is rotated clockwise to release the engagement, the curved lower end portion of the hook 27 is supported by the stopper bolt 29 and holds its position. By doing so, the lock 31 can move to the left and right as shown by the arrow C in FIG. 5, and the movement of the connecting teeth 32 provided at the left end of the lock 31 is changed by the connecting teeth provided on the side surface of the rail 11. It cannot be stopped by 11a. Thus, the front slider 13 can freely move on the rail 11. A stopper wall 33 is provided on the side surface of the front slider 13 to restrict the movement of the lock 31. The gripper 34 holds the rail 11 and secures the smooth movement of the front slider 13. The gripper 35 is provided with end stoppers 35a and 35b, which come into contact with end stoppers (not shown) at both ends of the rail 11 to prevent derailment of the front slider 13. Further, the die slide rail 46 of FIG. 7 is provided to facilitate the propulsion.

Similar to the front slider 13, the rear slider 15 has handles 36, hooks 37, hexagon bolts 38 a, hexagon nuts 38 b, stopper bolts 39, locking bolts 40, locks 41, connecting teeth 42, stopper walls 43, grippers 44. Although the end stoppers 45a and 45b are provided, the structure is the same as that described above, and thus detailed description thereof is omitted.

Next, the base assembly 10 will be described with reference to FIGS. 9 and 10. The base 47 is formed in the shape of the Japanese character "Sun" when viewed from directly above, and rail assemblies are erected at both ends like an overpass, and rails 11 and 12 are connected to them with screws. . The above-mentioned continuous teeth 32 and 42 are provided on the outer surfaces of the rails 11 and 12, respectively, so that the front sliders 13 and 14 repeatedly propel and stop on the rails 11 and 12. Support rails 48 and 49 are erected on the base 47 to support the pushing base 19 and the embedded pipe holding guide ring 18. The end stoppers 50 and 51 prevent the front sliders 13 and 14 from derailing from the rails 11 and 12.

Next, the operation of the hydraulic small-sized underground pipe apparatus according to the embodiment of the present invention in two steps will be described. First, the first step (previous step) will be described. First, as shown in Fig. 1, the underground piping device is placed at the bottom of the starting shaft, the rotational force and propulsion force are adjusted, the transit stand is attached, and the transit 5 in Fig. 2 is aligned with the planned center and slope. In the construction of the first process, a lead pipe (not shown) is used instead of the screw rod 6 and the buried pipe 7 in FIG. Then, the lead tube adapter is attached to the pushing table 19 and the lead tube is attached to the lead tube adapter, so-called mirror cutting is performed. First, assuming that the cylinder rod 21 is pushed all the way into the propulsion cylinder 20 in the initial state, the lock of the hook 27 is released and the hook 37 is locked, and the front slider 13 cannot move on the rail 11. However, it is assumed that the rear slider 15 is fixed to the rail. First, when the supply / discharge lever 60 is switched to the oil supply position, oil is supplied to the propulsion cylinder 20 via the hydraulic hose 61, and the propulsion cylinder 20 and the front slider 13 are propelled in the direction away from the rear slider 15 and the propulsion cylinder rod 21. In this way, the speeder head 9 and the lead tube are pushed into the ground by propelling the pushing table 19 connected and supported by the front sliders 13 and 14. It is possible to correct the direction of the lead tube while checking the high-intensity light-emitting diode inside the speeder head 9 attached to the head of the hollow lead tube with the transit 5, and it is possible to correct the direction in any 360 ° circumferential direction. Yes, these orientation corrections are as accurate as 3 mm at 50 meters. Then, the lead tube is pushed toward the reaching shaft.

When a certain amount of oil has been supplied to the propulsion cylinder 20, the propulsion is ended, the supply / discharge lever 60 is switched from the previous oil supply position to the oil discharge position through the neutral position, and the front slider 13 is moved. The handle 26 is turned counterclockwise to hook the hook 27 so that the front slider 13 cannot move on the rail 11. On the other hand, the handle 36 of the rear slider 15 is turned clockwise to unlock the hook 37 and the rear slider 13. 15 makes it possible to move on the rail 11. As a result, the hydraulic pressure is discharged from the propulsion cylinder 20 via the hydraulic hose 62, and the rear slider 15 moves forward to approach the front slider 13. Therefore, in this case, since the pushing base 19 cannot be moved, the lead tube is not pushed. When one measuring operation is completed in this way, the same operation may be repeated.

When the embedding of the first lead tube into the ground is completed, the rear part of the lead tube is cut off from the lead tube adapter by a tool or the like to separate it from the pushing table 19 by using a tool or the like. Next, in order to secure a space for connecting the first lead tube and the second lead tube, the push-back table 19 is retracted. The backward movement is only the combination of the positions of the hooks 27 and 37 opposite to that of the propulsion, and the operation of the lever 60 is the same as that of the propulsion, and there is almost no difference except that the propulsion operation and the moving direction are opposite. The description is omitted. Then, the front slider 13 and the rear slider 15 retreat to a predetermined position. When the pushing table 19 and the like are retracted to the predetermined position in this way, the second lead tube is placed in the vacant space and screwed into the first lead tube to connect. Then, the feeding / discharging lever 60 is operated to propel it until the rear end of the second lead tube comes into contact with the push-in base 19. Next, the rear end of the second lead tube is fixed to the rotating part of the push-in table 19. Then, when the preparation for pushing the second lead tube is completed, the position of the feeding / discharging lever 60 is switched to operate until the second lead tube is buried in the ground, as described above. The operation similar to the pushing operation of the pipe is also buried in the ground for the second lead pipe. After that, while replenishing the third and fourth lead pipes one after another, the lead sliders are buried in the ground and the alternate propulsion work of the front slider 13 and the rear slider 15 is repeated until the last lead pipe reaches the reaching shaft. Once the reed tube reaches the reaching pit, the operation is suspended. Then, the lead tube adapter of the rearmost lead tube is removed to separate the lead tube and the pushing table 19, and then the pushing table 19 is retracted.

Next, the second step (post-step) will be described. This is because the screw rod 6 and the buried pipe 7 were connected to each other after the speeder head 9 and the lead pipe in FIG. First, a screw rod adapter is connected instead of the lead pipe adapter, the embedded pipe push plate set 17 is mounted as shown in FIG. 2, the screw rod 6 is attached to the screw rod adapter, and the embedded pipe 7 is attached to the push-in base 19. It is attached to the buried pipe pushing plate set 17 and the buried pipe holding guide ring 18. The head cutter 8 is attached to the head of the screw rod 6, and the rotary joint is attached. The type of head cutter can be selected according to the soil quality. Then, the rear part of the lead tube and the tip of the screw rod 6 are connected. Next, a swivel is attached and mirror cutting is performed. First, in the initial state, the cylinder rod 21 is fully pushed into the propulsion cylinder 20, the lock of the hook 27 is released, the hook 37 is locked, and the front slider 13 can move on the rail 11, and the rear slider 15 moves on the rail 11. It is fixed to. When the supply / discharge lever 60 is first switched to the oil supply position, oil is supplied to the propulsion cylinder 111 via the hydraulic hose 61 to propel the propulsion cylinder 20, so that the front slider 13 moves forward and the rear slider 15 and the propulsion cylinder rod. Drive away from 21. In this way, the leading cutter 8 and the screw rod 6 are pushed into the ground while being rotated by the thrust of the pushing base 19 connected and supported by the front sliders 13 and 14, and the buried pipe 7 is not rotated into the ground. It is pushed in as it is. At the beginning, the lead pipe is pushed out to the reaching shaft, the soil excavated by the leading cutter 8 is discharged by the screw rod 6, and the soil is carried to the starting shaft. In addition, when the pushing table 19 or the like is propelled on the rails 11 and 12 as required due to the soil condition, the water pressure generator 4 passes through the water supply hose and passes through the hollow portion (not shown) of the screw rod 6 to lead the cutter. Pressurized water is supplied to the central axis of No. 8, and the pressurized water is ejected from the injection port at the tip of the central axis to facilitate excavation and sediment transport.

When the supply of a fixed amount of oil to the propulsion cylinder 20 is completed, the propulsion is terminated, and the supply / discharge lever 60 is switched from the previous oil supply position to the oil discharge position through the neutral position. The handle 26 of the front slider 13 is turned counterclockwise to lock it so that the front slider 13 cannot move on the rail 11, while the handle 36 of the rear slider 15 is turned clockwise to release the lock and the rear slider 15 is locked. Can move on the rail 11. As a result, the hydraulic pressure is discharged from the propulsion cylinder 20 via the hydraulic hose 62, and the rear slider 15 moves forward to approach the front slider 13. During this push-in preparation work, the push-in base 19 cannot be moved, so that the embedded pipe 7 is not pushed in. Further, the front slider 13 is movable without being fixed to the rail 11. When one push-in preparation and push-in operation are completed in this way, the same operation may be repeated thereafter. On the other hand, since the lead pipe is pushed out at the reaching shaft, the lead pipe is removed at the reaching shaft to collect it. The length of the reed tube is 600 mm so that it can be easily taken out from the reaching shaft.

When the embedding of the first screw rod 6 and the buried pipe 7 into the ground is completed, the first screw rod 6 and the buried pipe 7 are cut from the pushing table 19 with a tool etc. using a tool or the like. Let go. Next, in order to connect the first screw rod 6 and the buried pipe 7, and the second screw rod and the buried pipe, the push-in base 19, the front slider 13, and the rear slider 15 are retracted to predetermined positions. The backward movement is only the reverse combination of the positions of the hooks 27 and 37, and the operation of the lever 60 is the same as that of the advanced movement, and is almost the same as the movement except that the moving direction is opposite to the propulsion movement. Absent. Further, when the pushing base 19 is retracted, water supply is not necessary, so that pressurized water does not jet from the jet port at the tip of the central shaft. When the push-in table 19 and the like retracts to the predetermined position in this way, the second embedded pipe in which the second screw rod is loosely fitted in the vacant space is screwed into the first embedded pipe to connect it, and the second screw is connected. The tip of the rod is connected to the tail of the first screw rod and is passed through the buried pipe guide ring 18. The connection of the buried pipe uses a waterproofing lubricant to improve the reliability of the joint. Then, the supply / discharge lever 60 is operated to propel the second buried pipe and the rear end of the screw rod until the rear end of the screw rod comes into contact with the push-in base 19. Next, the rear end of the second screw rod is fixed to the rotating portion of the push-in base 19 and the second embedded pipe is fixed to the embedded pipe push plate set 17.

Then, when the connection work between the second buried pipe and the screw rod is completed, the position of the supply / discharge lever 60 is switched until the second buried pipe and the screw rod are buried in the ground. As described above, the same operation as the pushing operation of the first screw rod 6 and the buried pipe 7 is performed, and the second buried pipe and the screw rod are buried in the ground. The third, the fourth, and the like, one after the other, the buried pipe and the screw rod are successively added, and the buried pipe 7 is buried in the ground. The buried pipe 7 that is buried first is gradually propelled until it reaches the vertical shaft. Alternate propulsion or back-and-forth work of 13 and rear slider 15, separation and connection work of the screw rod, the buried pipe and push-in base, and connection work of the screw rod and the buried pipe are repeated. When the buried pipe reaches the reaching shaft, the leading cutter 8 is removed. Next, a vinyl chloride pipe cleaner is attached to the leading screw rod 6, the push-in base 19 is moved backward, the screw rod is pulled out toward the front, and the inside of the pipe is cleaned with a cleaner. The ends of a series of continuously connected screw rods are pulled out from the buried pipe by the pull-out metal fittings connected to the push-in base 19, and the screw rods are turned to release the screw engagement between the screw rods. Then, the pushing base 19 is moved forward, the next screw rod is similarly pulled out by the pulling metal fitting, and the screw rod is completely pulled out by repeating such an operation.

Needless to say, various embodiments can be adopted without departing from the scope of the present invention.

[0023]

[Effect of device]

 The present invention is provided with a cylinder and a cylinder rod in which one step is made smaller than the length of the buried pipe, and the operation of the hydraulic operating portion and the locking and unlocking or the clamping and unclamping of the hydraulic clamp are alternately repeated. Thus, the cylinder, the cylinder rod, the first slider, and the second slider can be alternately moved and stopped repeatedly. That is, when one of the first slider and the second slider is fixed to the rail, the other is movable relative to the rail, and conversely, when one of them is movable along the rail, the other is fixed to the rail. It will be fixed. In this way, the cylinder and the cylinder rod move like the movement of a so-called shakutai insect. Therefore, by repeatedly moving and stopping the pushing table, the cylinder capacity required for one process is greatly reduced, the cylinder and cylinder rod are greatly downsized, and the hydraulic small underground piping system is extremely small. It will be lightweight.

Therefore, the diameter and length itself of the starting shaft for installing the underground piping device can be reduced, so that the construction work range can be limited and the diameter of the reaching shaft can also be reduced. Therefore, both the starting construction department and the arrival construction department have a small work occupation area, and the construction range is limited. Therefore, it is sufficient to close the road on one side, and it will be convenient for transportation. In addition, a small number of workers can carry out propulsion work, and even with a narrow road width (for example, at least 1.2 meters), it is possible to carry in and carry out a hydraulic small piping device. Construction is possible even in areas where it was difficult to construct pipes, which has the advantage of expanding the area for piping work.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a one-step construction method and a two-step construction method of an apparatus for underground piping.

FIG. 2 is a schematic perspective view of the entire embodiment.

FIG. 3 is a front view of a propulsion cylinder, a propulsion cylinder rod, and a related portion.

FIG. 4 is a plan view of a propulsion cylinder, a propulsion cylinder rod, and a related portion.

5 (a) is a sectional view taken along line Va-Va of FIG.
FIG. 5B is a Vb-Vb sectional view.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a plan view of a lock 31, connecting teeth 32, and a retaining bolt 30.

9 is a plan view of the rail assembly 47. FIG.

FIG. 10 is a side view of the rail assembly 47.

[Explanation of symbols]

 1 Hydraulic type small underground piping device 2 Propulsion machine main body 3 Hydraulic unit 4 Water pressure generator 5 Transit 6 Screw rod 7 Buried pipe 8 Leading cutter 9 Speeder head 10 Base assembly 11, 12 Rail 13, 14 Front slider 15 Rear slider 16 Hydraulic pressure Part 17 Buried pipe push plate set 18 Buried pipe holding guide ring 19 Pushing base 20 Propulsion cylinder 21 Propulsion cylinder rod 23 Attachment part 26, 36 Hand 27, 37 Hook 29, 39 Stopper bolt 30, 40 Lock bolt 31, 41 Lock 32 , 42 Connecting teeth 33, 43 Stopper wall 60 Feed / eject lever 61 Hydraulic hose 62 Hydraulic hose

Claims (4)

[Scope of utility model registration request] 1. A rail, a first slider for moving a cylinder along the rail, a second slider for moving a cylinder rod along the rail, and a first lock for fixing the first slider to the rail. Part, a second lock part capable of fixing the second slider to the rail, a control part capable of controlling the oil flow in the cylinder, and a movable part along the rail by the first slider or the second slider. Pushing the pushing table, the screw rod that can be separably connected to the pushing table so that it can be placed in front of the pushing table and can be separably connected to each other, and can be rotated by the pushing table, and the embedded pipe in which the screw rod is inserted. A holding part that can be separably connected to the base and a leading cutter that can be connected to the screw rod are provided, and the embedded pipes can be connected to each other, Hydraulic small underground piping system which is characterized by comprising reducing the length of one step of the cylinder and the cylinder rod than pipe length 設管. 2. A cylinder is fixed on the first slider,
While fixing the cylinder rod on the second slider,
The hydraulic small underground pipe apparatus according to claim 1, further comprising a connecting portion that connects the first slider or the second slider to the push-in base. 3. The hydraulic small underground pipe apparatus according to claim 1, wherein the control section is provided with an operation lever for controlling the hydraulic pressure of the cylinder to propel or retreat the cylinder and the cylinder rod. 4. The first lock portion and the second lock portion, a rotatable handle, a lock movable by the handle in a direction orthogonal to the rail, continuous teeth provided on the lock, and the continuous installation. It is comprised of a series of teeth provided along a rail that can engage with teeth, and the movement of the first slider or the second slider is blocked by the locking of the first lock portion or the second lock portion. Item 1. A small hydraulic underground piping device according to item 1.