JPH0649595U - Underground piping equipment - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To improve the efficiency of the work of pushing the pipe into the ground. [Structure] A pushing base 8 is disposed so as to be propulsive along an inner rail, and the pushing base pushes into the ground while rotating the screw 1 and an excavating blade fixed to the tip thereof and surrounds the screw 1. One end of the arranged pipe 3 is fixed and pushed into the ground. A hydraulic unit including a piston 13 and a cylinder 11 causes the push-in base 8 to be repeatedly driven and stopped. The inner clamp 14 is connected to the push-in base and one end of the cylinder, and integrally propels and stops along the inner rail, and is fixed to the inner rail by hydraulic pressure when stopped. The outer clamp 15 is connected to one end of the piston 13 and repeatedly propels and stops by hydraulic pressure, and when stopped, is hydraulically fixed to the outer rail 12. The supply / discharge lever 17a switches between pushing and stopping of the push-in table 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for underground piping in which a horizontal hole is formed in the ground or on the surface from the starting shaft to the reaching shaft, and a soft pipe or the like used for a water pipe or the like is inserted into the hole.

[0002]

[Prior art]

 The structure of a conventional underground piping device is, as shown in Japanese Patent Laid-Open No. 1-125495, a device for excavating the earth or the surface of the earth to carry out earth and sand, and a spiral on the outer periphery of a screw having an excavating blade at the tip. -Shaped screw blades are connected in series, the screw is loosely fitted inside the pipe, and the rotation of the screw causes the excavating blade at the tip to move forward while excavating the ground, and the screw blades gradually convey the earth and sand toward you. Therefore, the step of forming a hole in the ground and the step of inserting the pipe can be performed simultaneously by press fitting the pipe and the screw into the ground at the same time.

[0003]

[Problems to be solved by the device]

 However, due to the size restrictions of the hydraulic cylinders and pistons for propulsion of underground piping equipment, pipes that should be piped into the ground do not have to be propelled once along the rails, but rather the hydraulic cylinders and pistons. A pipe is completely pushed into the ground only after repeated propulsion and stoppage of the above. Therefore, when the cylinder is propelling forward, the piston will slip if not stopped, and conversely, when the piston is propelling forward, slip if the cylinder is not stopped. I will end up. Therefore, two stoppers for alternately fixing the cylinder and piston to the rail are provided, and the two locking devices provided on these two stoppers are repeatedly operated by hand, and one end of the cylinder and piston is fixed. Must be alternately fixed to or removed from the rail. Therefore, the operation of the stopper was very complicated and the work efficiency was low.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention is arranged so that it can be moved along the rails and pushes it into the ground while rotating the screw and the excavating blade fixed to the tip of the screw, and at least the pipe in which the screw is loosely fitted. A pusher with one end fixed and pushing it into the ground, an oil pressure unit with a piston and a cylinder that repeatedly move and stop the pusher, and a pusher that is movable along the rails. It is connected to one end of the hydraulic unit and moves and stops along the rail integrally with them, and when stopped, the first clamp fixed to the rail and the movable unit is arranged so as to be movable along the rail. , The second clamp connected to the other end of the hydraulic section is repeatedly moved and stopped by hydraulic pressure, and at the time of the stop, the second clamp fixed to the rail and the moving and stopping of the push-in base are switched, and in accordance with that, And gist underground piping system, characterized in that it comprises and one clamp and switching unit for moving or stopped and selectively switched first clamp and the second clamp to move or stop of the second clamp alternately.

[0005]

[Action]

 The switching unit alternately moves and stops the first clamp and the second clamp. When one of them is stopped, one of them is automatically fixed to the rail and the other is movable relative to the rail. On the contrary, when the other is stopped, the other is automatically fixed to the rail and one is movable relative to the rail. Therefore, it is not necessary to manually operate the fixing device to fix the stopper to the rail or release the stopper from the rail every time the vehicle is stopped. Therefore, the time for underground piping work can be greatly reduced.

[0006]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a device for underground piping according to an embodiment of the present invention, and FIG. 2 is a rear view thereof. A blade (not shown) is provided around a screw rod of the screw 1, and a vinyl chloride pipe 2 in which the screw 1 is loosely fitted is arranged. The tip of the screw 1 on the propulsion side is connected to the digging blade 3, and the rear end of the screw 1 is connected to the rotating portion 4. The rear end of the pipe 2 is fixed by the chuck 6 to control the movement of the pipe 2 in the circumferential direction. An inner rail 10 and an outer rail 12 are fixed to the base 9 in parallel. A pair of hydraulic cylinders 11 provided on both right and left sides of the push-in base 8 are connected to the push-in base 8 and the inner clamp 14 via the support portion 7, and can be propelled along the outer rail 12 integrally with them. The inner clamp 14 can be propelled along the inner rail 10. A pair of pistons 13 cooperating with a pair of cylinders 11 are fixedly mounted on the outer clamp 15. A pair of outer clamps 15 are provided on both left and right sides of the push-in table 8 and can be propelled along the outer rail 12. Therefore, the support portion 7, the push-in base 8, the cylinder 11 and the inner clamp 14, and the piston 13 and the outer clamp 15 are alternately propelled and stopped. The feeding / discharging lever 17a and the clamp lever 17b are composed of a lever type switch, and each of them can be switched to three positions. That is, the supply / discharge lever 17a has three switching positions: an oil supply position for supplying oil from the push-in base 8 to the cylinder 11, a neutral position, and an oil discharge position for discharging oil from the cylinder 11 to the push-in base 8. The clamp lever 17b has three switching positions: an inner clamp position for fixing the inner clamp 14 to the inner rail 10, a neutral position, and an outer clamp position for fixing the outer clamp 15 to the outer rail 12. The hydraulic hose 18a is a passage through which oil is supplied from the hydraulic pressure source to the pushing table 8, and the hydraulic hose 18b is a passage through which oil is discharged from the pushing table 8 to the hydraulic source. Pressurized water is supplied from a water supply hose (not shown) to the central shaft 23 of the excavating blade 1 through a hollow portion (not shown) of the screw 1, and pressurized water is jetted from a jet port 25 at the tip of the central shaft 23 to facilitate excavation. .

FIG. 3 is a left side portion of the rear view of the device for underground piping, showing a cross section of the inner clamp 14. When oil is supplied from the inlet 27, the spring 35 is pushed up by hydraulic pressure to raise the rod 29, and the gripper 31 fixed to the rod 29 sandwiches the inner rail 10 together with the hard metal pressing portion 33. As a result, the inner clamp 14 is fixed to the inner rail 10. On the contrary, when oil is not supplied, the rod 29 descends due to the urging force of the spring 35, and a clearance of 0.1 to 0.2 cm is formed between the inner rail 10 and the gripper 31, so that the inner clamp 14 moves inward. The rail 10 can be moved. Further, the silencer 37 removes oil and prevents clogging of dust. The rod 29 reciprocates up and down in the housing 39. The parts marked with dots in FIG. 3 indicate that the material is hard metal, and the backsides of the rotating part 4 and the chuck 6 are shown. By turning the separating lever 41 with a screw, the pushing base 8 and the inner clamp 14 are separated, and the underground piping device can be disassembled.

FIG. 4 is a part of the right side of the rear view of FIG. 1, and the outer clamp 15 is shown in a partial cross section. A pair of outer clamps 15 are arranged outside the inner clamp 14 with the base 9 interposed therebetween. A cylinder 43 and a piston 45 are provided below the inner clamp 14, and the piston 45 is fitted into the cylinder 43 to fill the space 47 inside with oil. Therefore, the piston 45 can be moved up and down according to the supply and discharge of oil. In addition, the contact plates 49 and 50 contacting the outer clamp 15 are made of hard metal at places where friction between members is likely to occur to prevent abrasion. The abutment plate 49 is fixed to the outer clamp 15 by screws 52, while the abutment plate 50 is integrated with the intermediate plate 56 by screws 54. The upper end of the piston 45 is connected to the head 51 via the connecting portion 48. As shown in FIGS. 5 (A) and 5 (C), a plurality of teeth 53 are connected to the head 51 in parallel with each other. The teeth 53 are configured to mesh with the teeth provided on the lower surface of the outer rail 12. The support portion 57 can be moved in the left-right direction in the drawing within the adjustment groove 55 shown in FIG. 5B so that the meshing is properly performed. The head 51 can be driven up and down by a piston 59 and a cylinder 61, and when the head 51 is driven upward, meshing is performed and the outer clamp 15 is fixed to the outer rail 12. On the contrary, when the head 51 is driven downward, the engagement is released and the outer clamp 15 can be propelled along the outer rail 12. A pair of guide bars 63 are provided close to both side surfaces of the piston 59 and the cylinder 61 to appropriately guide the head 51 in the vertical direction. The cover 65 protects the bottom of the guide bar 63.

Next, the propulsion operation of the device for underground piping will be described with reference to FIGS. 3 to 6. First, the underground piping system is installed in the starting shaft. Then, the screw 1 and the pipe 2 are attached to the push-in base 8. In the initial state, the piston 13 is fully pushed into the cylinder 11. First, the supply / discharge lever 17a is switched to the oil supply position, and the clamp lever 17b is switched to the outer clamp position. Then, oil is supplied to the cylinder 11 via the hydraulic hose 19a, and the cylinder 11 is propelled and propelled in a direction away from the piston 13 and the outer clamp 15. At the same time, no oil pressure is supplied to the inner clamp 14 via the hydraulic hose 20a, so that the inner clamp 14 is not fixed to the inner rail 10 and the clamp function does not work. On the other hand, oil is supplied to the outer clamp 15 via the hydraulic hose 21, and the outer clamp 15 is fixed to the outer rail 12. Therefore, as shown by the arrow E in FIG. 6 (A), the support portion 7, the push-in base 8, the cylinder 11 and the inner clamp 14 are integrally propelled to a predetermined position, while the piston 13 and the outer clamp 15 are placed outside. It is fixed to the rail 12 so that the above propulsion does not slip (see FIGS. 6A and 6B). In this way, the screw 1, the pipe 2, and the excavating blade 3 are pushed into the ground while being rotated by the thrust of the pushing table 8. Further, when the pushing platform 8 and the like are propelling on the inner rail 10 and the outer rail 12, pressurized water is supplied from the water supply hose (not shown) to the central shaft 23 of the excavating blade 1 through the hollow portion (not shown) of the screw 1. The pressurized water is supplied from the injection port 25 at the tip of the central shaft 23 to facilitate excavation and transportation of earth and sand.

When the pushing table 8 and the like have finished propelling to a predetermined position, the supply / discharge lever 17a is switched from the previous oil supply position to the oil discharge position through the neutral position, and at the same time, the clamp lever 17b is changed to the outer clamp position described above. To the inner clamp position through the neutral position. In this case, hydraulic pressure is not supplied to the cylinder 11 via the hydraulic hose 19a, and conversely, pressure oil is discharged from the cylinder 11 via the hydraulic hose 19b. At the same time, the hydraulic pressure is supplied to the inner clamp 14 via the hydraulic hose 20a, and the inner clamp 14 is fixed to the inner rail 10 to function as a clamp. On the other hand, oil is not supplied to the outer clamp 15 via the hydraulic hose 21, and as a result, the outer clamp 15 is not fixed to the outer rail 12 but movable. Therefore, as shown by the arrow F in FIG. 6 (B), the support portion 7, the pushing base 8, the cylinder 11 and the inner clamp 14 are fixed to the inner rail 10, while the piston 13 and the outer clamp 15 are fixed to the outer rail. It is propelled along the rule 12, approaches the support portion 7 and the cylinder 11, and is propelled to a predetermined position (see FIG. 6C). Therefore, the piston 13 approaches the cylinder 11 in the direction of approaching and propels forward.

When the embedding of the first screw 1 and the pipe 2 into the ground is completed, the first screw 1 and the pipe 2 are separated from the push-in base 8 with a tool or the like by using a tool or the like. Next, in order to connect the first screw 1 and the pipe 2 and the second screw and the pipe, the retracting operation of the device for underground piping is performed. The reverse operation is only the reverse of the case where the position of the supply / discharge lever 17a is the propulsive operation, and is almost the same as the propulsive operation except that the moving direction is opposite to that of the propulsive operation. First, the initial state is a state in which the piston 13 is fully pushed into the cylinder 11. The supply / discharge lever 17a is switched to the oil supply position, and at the same time, the clamp lever 17b is switched to the inner clamp position. Thus, as shown by the arrow H in FIG. 6 (B), the support portion 7, the pushing base 8, the cylinder 11 and the inner clamp 14 are fixed to the inner rail 10, while the piston 13 and the outer clamp 15 are fixed to the outer rail 12. It retreats along it, approaches the support part 7 and the cylinder 11, and retreats to a predetermined position (see FIG. 6 (B)).

Next, the supply / discharge lever 17a is switched from the previous oil supply position to the oil discharge position through the neutral position, and at the same time, the clamp lever 17b is switched from the previous inner clamp position to the outer clamp position through the neutral position. . Then, as shown by an arrow I in FIG. 6 (A), the support portion 7, the pushing base 8, the cylinder 11 and the inner clamp 14 are integrally retracted to a predetermined position, while the piston 13 and the outer clamp 15 are moved to the outer side. It is fixed to the rail 12 so that the above retreat does not slip (see FIGS. 6 (A) and 6 (B)). It should be noted that hydraulic power is not transmitted when the vehicle is retracted, and work safety is ensured. Further, when the push-in table 8 is retracted, water supply is not necessary, so that pressurized water does not jet from the jet port 25 at the tip of the central shaft 23.

When the push-in table 8 or the like is retracted to the predetermined position in this way, the second screw is put in the empty space and connected to the first screw 1 so that the second pipe surrounds the second screw. To place. Then, the positions of the supply / discharge lever 17a and the clamp lever 17b are operated to propel the second pipe and the screw until the rear ends of the screws come into contact with the push-in base 8. Next, the rear end of the second screw is fixed to the rotating portion 4 and the second pipe is held by the chuck 6.

Then, when the preparation for pushing the second pipe is completed, the positions of the feeding / discharging lever 17a and the clamp lever 17b are switched to operate until the second pipe is buried in the ground as described above. The same operation as the pushing operation of the first pipe 2 is performed for the second pipe and the screw and embedded in the ground. Repeat the third and fourth pipes and screws one after the other until they are buried in the ground and the last pipe is finished. The alternating propulsion work of the inner clamp 14 and the outer clamp 15 is repeated until the pipe 2 initially buried in this way gradually propels and reaches the reaching pit (see FIGS. 6A to 6D). Finally, when the work of pushing the pipe is completed, the screw is pulled out from the pipe.

It goes without saying that various embodiments can be taken without departing from the scope of the present invention. For example, the supply / discharge lever 17a and the clamp lever 17b may be replaced with automatic operation by a program built in the microprocessor, if necessary. At this time, it can be simplified by pushing or releasing the push button, the backward button, and the pipe attaching / detaching button. Alternatively, the rails may be integrated to provide the first clamp and the second clamp on one rail.

[0016]

[Effect of device]

 The switching unit alternately moves and stops the first clamp and the second clamp, and when one of them stops, one of them is automatically fixed to the rail and the other can move relatively to the rail. Is. On the contrary, when the other one is stopped, the other is automatically fixed to the rail and one is movable relative to the rail. Therefore, it is not necessary to manually operate the fixing device to fix the stopper to the rail or release the stopper from the rail each time the vehicle is stopped. Therefore, the time for underground piping work can be greatly reduced.

[Submission date] September 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Compensation target item name] Detailed explanation of the device

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for underground piping in which a horizontal hole is formed in the ground or on the surface from the starting shaft to the reaching shaft, and a soft pipe or the like used for a water pipe or the like is inserted into the hole.

[0002]

[Prior art]

 The structure of the conventional underground piping device isJapanese Patent Publication No. 61-44198 etc.As shown in Fig. 3, it is a device for excavating the earth or the surface of the earth to carry out the earth and sand.(Buried Installation pipe) It is loosely fitted inside and the tip of the excavating blade is rotated by the screw rotation.(Top cutter)Moves forward while excavating the ground, and the screw wings gradually convey the earth and sand toward you. Therefore With a pusher that can move the rails By press-fitting the pipe and the screw into the ground at the same time, the step of forming a hole in the ground and the step of inserting the pipe can be performed at the same time.

[0003]

[Problems to be solved by the device]

However, since should one pushed without the hard vinyl chloride pipe with push, the entire underground piping system it may increase the length of the cylinder and the piston rod together with the heavy Kunar large, start installing the underground piping system There were points to be improved such as the diameter of the shaft increased and the construction work range increased.

Therefore, an object of the present invention is to reduce the size and weight of an underground piping device , reduce the diameter of a starting shaft, and narrow the construction range.

[0005]

[Means for Solving the Problems]

 Therefore, the present invention is arranged so that it can be moved along the rails and pushes it into the ground while rotating the screw and the excavating blade fixed to the tip of the screw, and at least the pipe in which the screw is loosely fitted. A pusher with one end fixed and pushing it into the ground, an oil pressure unit with a piston and a cylinder that repeatedly move and stop the pusher, and a pusher that is movable along the rails. It is connected to one end of the hydraulic unit and moves and stops along the rail integrally with them, and when stopped, the first clamp fixed to the rail and the movable unit is arranged so as to be movable along the rail. , The second clamp connected to the other end of the hydraulic section is repeatedly moved and stopped by hydraulic pressure, and at the time of the stop, the second clamp fixed to the rail and the moving and stopping of the push-in base are switched, and in accordance with that, And gist underground piping system, characterized in that it comprises and one clamp and switching unit for moving or stopped and selectively switched first clamp and the second clamp to move or stop of the second clamp alternately.

[0006]

[Action]

Cylinder and piston rod are alternately propelled by oil control by the switching unit, The clamp and the second clamp are alternately moved and stopped repeatedly. One of them When stopped, one of them is fixed to the rail and the other is movable relative to the rail Is. Conversely, when the other of them stops, the other is fixed to the rail and the other is locked. It is possible to move relative to the game. That is, the cylinder and piston rod The length of the cylinder and piston rod are It is greatly shortened and the hydraulic underground piping system becomes extremely small.

[0007] cylinder and it is conceivable to provide two lock each since the piston rod is fixed to the rail alternately, the cylinder and the piston rod due to complicated operations of the two lock in such locking rail It is not necessary to alternately fix or release to , and switching can be done easily. Therefore, the work efficiency is high, and the time for underground piping work can be significantly reduced.

[0008]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an apparatus body for hydraulic small underground piping according to an embodiment of the present invention, and FIG. 2 is a rear view thereof. Hydraulic unit, a power supply, peripheral devices transit such as explaining the apparatus main body underground piping omitted. Wing screw rod of the screw 1 (not shown) is circumferentially provided, Ru Tei vinyl chloride pipe 2 loosely fitting the screw 1 is disposed. Tip of the propulsion side of the screw 1 is connected to the digging edge (top cutter) 3, is linked to a rotating part 4 of the rear end portion of the screw-1 is at the front of the center of the push block 8 (FIG. 2). The rear end portion of the pipe 2 is fixed by the chuck 6 regulates the movement in the circumferential direction of the pipe 2. Also the fact that the inner rail 10 and outer rail 12 are a pair fixed to the left and right sides parallel to the base 9. A pair of hydraulic cylinders 11 provided on both right and left sides of the pushing table 8 are fixed on the slider 16 and connected to the pushing table 8 via the slider 16 , and the pushing table 8 is connected to the inner clamp 14 . The slider 16 is Ri propulsion can der along the outer rail 12, the inner clamp 14 has a possible promotion along the inner rail 10. A pair of piston rods 13 of a pair of cylinders 11 cooperating with the Ru Tei is fixed on the outer clamp 15. Its outer clamp 15 Are What Do enable promotion as monorail along the outer rail 12 provided in a pair on left and right sides of the push block 8. Thus, pressing Komidai 8 and the cylinder 11 and the inner clamp 14 and the slider 16, and a piston rod 13 and the outer clamp 15 is able to repeat the propulsion and stop alternately. The feeding / discharging lever 17a and the clamp lever 17b are composed of lever-type switches, and can be switched among three positions. That is, the supply / drain lever 17a is switched between three positions, that is, an oil supply position for supplying oil to the cylinder 11 from the pushing table 8 communicating with the hydraulic unit , a neutral position, and an oil discharging position for discharging oil from the cylinder 11 to the pushing table 8. position and have a. The clamp lever 17b has an inner clamping position for securing the inner rail 10 over the clamp inside the clamp 1 4, the neutral position置及beauty fixed to the outer clamping the outer clamp 15 over the clamp outwardly clamp 15 to the outer rail 12 those having three switching positions of the position. The hydraulic hose 18a is a passage through which oil is supplied from the hydraulic pressure source to the pushing table 8, and the hydraulic hose 18b is a passage through which oil is discharged from the pushing table 8 to the hydraulic source. Further, pressurized water is supplied from a water supply hose (not shown) to the central shaft 23 of the excavating blade 1 through a hollow portion (not shown) of the screw 1, and the pressurized water is ejected from the injection port 25 at the tip of the central shaft 23 to facilitate excavation. am I Do not like.

FIG. 3 showsHydraulic compactLeft side of rear view of underground piping equipmentPartial sectional view showingAnd the cross section of the inner clamp 14 is shownTheIt When oil is supplied from the inlet 27, the spring 35 is pushed up by hydraulic pressure to raise the rod 29, and the gripper 31 fixed to the rod 29 sandwiches the inner rail 10 with the pressing portion 33 made of hard metal. Is becoming . Thereby, the inner clamp 14 is fixed to the inner rail 10. Will be . On the contrary, when oil is not supplied, the rod 29 descends due to the urging force of the spring 35, so that the distance between the inner rail 10 and the gripper 31 is 0.1 to 0. A gap of 2 cm is formed so that the inner clamp 14 can move the inner rail 10.Become ing . Further, the silencer 37 removes oil and prevents clogging of dust.Because Ru . The rod 29 reciprocates up and down in the housing 39.Will be. The parts marked with dots in FIG. 3 indicate that the material is hard metal, and the back side of the rotating part 4 and the chuck 6 are shown.TheIt It should be noted that by turning the separation lever 41 with a screw, the push-in base 8 and the inner clamp 14 are separated, and the underground piping device can be disassembled.Is .

[0010] Figure 4 is a partial sectional view showing a right-hand portion of the rear view of FIG. 1, the outer clamp 15 is Ru Tei shown in partial section. Outer clamp 15 is intended to be a pair disposed on the outside of the inner clamp 14 at a base 9. Cylinder 43 and the piston 45 is provided in a lower portion of the inner clamp 14, Ru Tei oil is filled in the space 47 inside the piston 45 is fitted into the cylinder 43. Therefore, the piston 45 can move up and down according to the supply and discharge of oil. Also is prone locations friction between members and thus that will be in contact with the contact plate 49 and 50 and the hard metal on the outside clamp 15 to prevent wear. The abutment plate 49 screws 52 are secured to the outer clamp 15, while, so that the contact plate 50 screws 54 are integrated with the intermediate plate 56. The upper end of the piston 45 is intended for connecting the head 51 via a connecting portion 48. The Ru Tei plurality of teeth 53 are parallel to mutually contiguous as shown in FIG. 5 (A) (C) in the head 51. The teeth 53 are configured to mesh with the teeth provided on the lower surface of the outer rail 12. The supporting portion 57 can be moved in the left-right direction in the drawing within the adjustment groove 55 shown in FIG. 5B so that the meshing can be properly performed. Head 51 can be driven up and down by a piston 59 and shea cylinder 61, the outer clamp 15 is performed meshing the head 51 is driven in the above Ru Tei is fixed to the rail 12. On the contrary, when the head 51 is driven downward, the engagement is released and the outer clamp 15 can be propelled along the outer rail 12. A pair of guide bars 63 are provided close to both side surfaces of the piston 59 and the cylinder 61, so that the head 51 can be guided vertically. Incidentally, Ru Tei bottom of the guide bar 63 is protected by a cover 65.

Next, the propulsion operation of the device for underground piping will be described with reference to FIGS. 3 to 6. First, the underground piping system is installed at the bottom of the starting shaft. Then, the screw 1 and the pipe 2 are attached to the pushing table 8. In the initial state, the piston rod 13 is fully pushed into the cylinder 11. First, the supply / discharge lever 17a is switched to the oil supply position, and the clamp lever 17b is switched to the outer clamp position. Then, the oil is supplied to the cylinder 11 via the hydraulic hose 19a, and the cylinder 11 propels the cylinder 11 and the piston rod 13 and the outer clamp 15 away from each other. At the same time, the hydraulic pressure is not supplied to the inner clamp 14 via the hydraulic hose 20a, and the inner clamp 14 is not fixed to the inner rail 10 and the function of the clamp does not work. On the other hand, oil is supplied to the outer clamp 15 via the hydraulic hose 21, and the outer clamp 15 is fixed to the outer rail 12. Accordingly, the slider 16 and the pusher table 8 and Siri Sunda 11 and the inner clamp 14 as indicated by an arrow E shown in FIG. 6 (A) is promoted to integrally place while the piston rod 13 and the outer clamp 15 It is fixed to the outer rail 12 so that the above propulsion does not slip (see FIGS. 6A and 6B). Thus Kezuha 3 drilling and screw 1 Ri by the promotion of push-base 8 is rarely pushed into the ground while rotating, pipe 2 is pushed as it is without being rotated. When the pushing platform 8 and the like are propelling on the inner rail 10 and the outer rail 12, pressurized water is supplied from the water supply hose (not shown) to the central shaft 23 of the excavating blade 1 through the hollow portion (not shown) of the screw 1. The pressurized water is jetted from the jet port 25 at the tip of the central shaft 23 to facilitate excavation and transportation of earth and sand.

When the pushing table 8 and the like have finished propelling to a predetermined position, the supply / discharge lever 17a is switched from the previous oil supply position to the oil discharge position through the neutral position, and at the same time, the clamp lever 17b is changed to the outer clamp position described above. To the inner clamp position through the neutral position. In this case, hydraulic pressure is not supplied to the cylinder 11 via the hydraulic hose 19a, and conversely, pressure oil is discharged from the cylinder 11 via the hydraulic hose 19b. At the same time, the hydraulic pressure is supplied to the inner clamp 14 via the hydraulic hose 20a, and the inner clamp 14 is fixed to the inner rail 10 to function as a clamp. On the other hand, oil is not supplied to the outer clamp 15 via the hydraulic hose 21, and as a result, the outer clamp 15 is not fixed to the outer rail 12 but movable. Therefore, as shown by the arrow F in FIG.Slider 16And push-in base 8 and cylinder 11Outer rail 12 Fixed to Inner clamp 14And withinFixed to side rail 10, while pistonrod13 and outer clamp 15 propel along outer rail 12,Sly Da 16 And the cylinder 11 are approached and propelled to a predetermined position (see FIG. 6C). Therefore the pistonrod13 approaches the cylinder 11 in the approaching direction and propels it forward. In this way, the pushing table 8, the cylinder 11, the inner clamp 14, the slider 16, and the pin. The stone rod 13 and the outer clamp 15 alternately repeat propulsion and stop. That is, The cylinder and piston rod move like a so-called "shokuzushi". Therefore, 1 The length of the cylinder and piston rod is large compared to the conventional device that pushes the pipe in every time. The width is shortened and the hydraulic small underground piping system can be made smaller and lighter.

When the embedding of the first screw 1 and the pipe 2 into the ground is completed, the first screw 1 and the pipe 2 are separated from the push-in table 8 with a tool or the like by using a tool or the like.

Next, the retracting operation of the device for underground piping for connecting the first screw 1 and the pipe 2 and the second screw and the pipe will be described. The reversing operation only switches the position of the feeding / discharging lever 17a in the opposite manner to the case of the propulsion operation, and is almost the same as the propulsion operation except that the movement direction is opposite to the propulsion operation. Therefore, only the difference will be described. First, the initial state is a state in which the piston rod 13 is fully pushed into the cylinder 11. The supply / discharge lever 17a is switched to the oil supply position, and at the same time, the clamp lever 17b is switched to the inner clamp position. Thus urchin I indicated by the arrow H in FIG. 6 (B), the slider 16 and the pusher table 8 and the cylinder 11 are outside Le - fixed to both inner clamp when secured to Le 12 1 4 inner rail 10, whereas the piston The rod 13 and the outer clamp 15 retreat along the outer rail 12 to a predetermined position away from the slider 16 and the cylinder 11 (see FIG. 6B).

Next, the supply / discharge lever 17a is switched from the previous oil supply position to the oil discharge position through the neutral position, and at the same time, the clamp lever 17b is switched from the previous inner clamp position to the outer clamp position through the neutral position. . Then, as shown by the arrow I in FIG. 6 (A), the slider 16 , the push-in base 8, the cylinder 11 and the inner clamp 14 are integrally retracted to a predetermined position, while the piston rod 13 and the outer clamp 15 are moved to the outer rail. It is fixed to 12 so that the above retreat does not slip (see FIGS. 6A and 6B). Note that hydraulic power is not transmitted during backward movement, ensuring work safety. Further, when the push-in table 8 is retracted, water supply is not necessary, so that pressurized water does not jet from the jet port 25 at the tip of the central shaft 23.

When the pushing table 8 and the like are retracted to the predetermined position in this way, the second screw is put in the empty space and connected to the first screw 1 so that the second pipe surrounds the second screw. thereby disposed to connect by screwing to the first pipe. Then, the positions of the supply / discharge lever 17a and the clamp lever 17b are operated to propel the push-in base 8 until the second pipe and the rear end of the screw come into contact with the push-in base 8 . Next, the rear end of the second screw is fixed to the rotating part 4 and the second pipe is held by the chuck 6.

Then, when the preparation for pushing the second pipe is completed, the positions of the feeding / discharging lever 17a and the clamp lever 17b are switched to operate until the second pipe and the screw are buried in the ground. As described above, the same operations as the pushing operation and the retreating operation of the first pipe 2 are performed for the second pipe and the screw and embedded in the ground. Below, the third, while the fourth and one after another replenishing the pipe and screw, and repeats the same work until the end of the buried the last of the pipe went embedded in the ground. That is, up to the first gradually promoted head of the pipe 2 embedded reaching anti repeats alternate propulsion work inside the clamp 14 and the outer clamp 15 (see Figures 6 (A) (D)) . Finally, when all the pipe burying work is completed, the push-in base 8 is retracted and pulled out from the pipe in which the screw is embedded by using a pull-out metal fitting .

It is needless to say that various embodiments can be taken without departing from the scope of the present invention. For example, the supply / discharge lever 17a and the clamp lever 17b may be replaced with automatic operation by a program built in the microprocessor, if necessary. At this time, it can be simplified by pushing or releasing the push button, the backward button, and the pipe attaching / detaching button. Further, the inner rail and the outer rail may be integrated to provide the first clamp and the second clamp on one rail. That, push table depending on the oil pressure in the supply and discharge of the cylinder and the front clamp and the slider, and a piston rod and the rear clamp may be configured to repeat the propulsion and stop alternately along the one rail.

[0019]

[Effect of device]

The switching unit alternately moves and stops the first clamp and the second clamp, and when one of them stops, one of them is automatically fixed to the rail and the other can move relatively to the rail. Is. On the contrary, when the other one is stopped, the other is automatically fixed to the rail and one is movable relative to the rail. Since these propulsion and fixed are repeated, miniaturization and weight reduction of the hydraulic type small underground piping system length of Cylinders and piston rod is significantly shortened is achieved as compared with the device to push the pipe at a time . Therefore, it is sufficient to close the road on one side even if the road is not closed on both sides during the underground pipe burying work.The construction area is also extremely narrow, and even if the road is narrow , the hydraulic small underground piping system can be transported by a small truck. There is a merit that can be done. It is conceivable setting takes that the two locking for fixing the rail to the cylinder and piston rod are alternately Furthermore, because it is clamped, the a first clamp operating the lock each time by hand every stop two There is no need to secure the clamps to the rails or release the first and second clamps from the rails. Therefore, the time for underground piping work can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an entire underground piping device.

FIG. 2 is a rear view of the underground piping device.

FIG. 3 is a view showing a part of the left side of the rear view of the device for underground piping.

FIG. 4 is a diagram showing a part of the right side of the rear view of the device for underground piping.

FIG. 5 is a view showing a main part of an outer clamp of the device for underground piping.

FIG. 6 is a schematic diagram showing operations of an inner clamp, an outer clamp, and the like of the device for underground piping.

[Explanation of symbols]

 1 Screw 2 Pipe 3 Drilling Blade 8 Inner Rail 10 Inner Rail 11 Cylinder 12 Outer Rail 13 Piston 14 Inner Clamp 15 Outer Clamp 17a Feed / Discharge Lever 17b Clamp Lever 18a, 18b Hydraulic Hose 20a, 20b Hydraulic Hose 21 Hydraulic Hose

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[Procedure amendment]

[Submission date] September 7, 1993

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an entire underground piping device.

FIG. 2 is a rear view of the underground piping device.

[Figure 3] Part of a portion of the left rear view for underground piping system
It is a partial cross-sectional view.

[4] Part of a portion of the right rear view for underground piping system
It is a partial cross-sectional view.

FIG. 5 is a view showing main components of an outer clamp of the device for underground piping.

FIG. 6 is a schematic plan view showing operations of an inner clamp, an outer clamp, and the like of the underground piping device.

[Explanation of Codes] 1 Screw 2 Pipe 3 Excavation Blade 8 Pushing Stand 10 Inner Rail 11 Cylinder 12 Outer Rail 13 Piston Rod 14 Inner Clamp 15 Outer Clamp 16 Slider 17a Feed / Discharge Lever 17b Clamp Lever 18a, 18b Hydraulic Hose 20a, 20b Hydraulic Pressure Hose 21 hydraulic hose

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Scope of utility model registration request] 1. A pipe, which is movably arranged along a rail, is pushed into the ground while rotating a screw and an excavating blade fixed to the tip of the screw, and at least one end of a pipe in which the screw is loosely fitted is fixed. And a hydraulic unit having a piston and a cylinder for repeatedly moving and stopping the pushing base, and a hydraulic unit provided so as to be movable along the rail. The first clamp is connected to one end and moves and stops along the rail integrally with them, and when stopped, the first clamp is fixed to the rail and the other end of the hydraulic unit is movably arranged along the rail. The second clamp fixed to the rail at the time of stop and the movement and stop of the push-in base are switched, and the first clutch is correspondingly changed. Underground piping system, characterized in that it comprises a switching unit for selectively switching to move or stop the first clamp and the second clamp alternately movement or stop of the flop and the second clamp.