JPH0781260B2 - Method for punching underground lining pipe and punching machine therefor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Objects of the Invention (1) Field of Industrial Application The present invention relates to a lining pipe provided in an underground buried pipe such as a sewer pipe, and a mounting pipe communicating from the ground to the above-ground buried pipe. The present invention relates to a drilling method for achieving continuous open and cut and a drilling machine implemented in the drilling method.

(2) Conventional technology When the existing underground burial site needs to be deteriorated and needs to be renewed, it has already been attempted to insert a lining pipe (also called an inner tube) into the existing pipe. Then, a backfill material such as cement milk is generally injected into the gap between the lining pipe and the existing pipe.

In this case, the connection between the existing pipe and the pipe for flowing down the sewage / rainwater from the ground to the existing pipe is interrupted.
For this reason, it is known to make a hole from the inner side of the existing pipe in order to establish communication with the mounting pipe, as disclosed in JP-A-58-186600. According to this, it is possible to perform the drilling work without cutting the ground from the ground surface to the existing pipe, which is convenient, but it is difficult to accurately detect the drilling position corresponding to the mounting pipe. There are various drawbacks such that this work becomes more difficult as the diameter of the pipe becomes smaller.

(3) Problems to be Solved by the Invention Under such circumstances, the present invention focuses on the use of a mounting pipe without making an excavation from the surface of the earth, and makes a hole from the mounting pipe. It was made based on such an idea.

Therefore, it is an object of the present invention to provide a drilling method and device which can be inserted into a mounting tube having a bent portion having a small diameter and a very small curvature and performing the drilling operation.

B. Structure and Action of the Invention (1) Means for Solving the Problems In order to achieve the above object, the method for perforating an underground buried pipe lining pipe according to the first invention (hereinafter referred to as “first invention”), The following configuration (technical means) is adopted. That is, the rotary drive shaft 16 is driven by the drive motor 11, and an impact torque is applied to the rotary drive shaft 16 by the impact mechanism 12 provided on the rotary drive shaft, and at the same time, the machine frame 10 is vibrated by the vibration due to the impact torque. A thrust force is applied to the attached stopper 32, and the cutting tool 76 attached to the tip of the rotary drive shaft 16 is driven through the rotary drive shaft 16 to punch.

A second underground invention (hereinafter referred to as "second invention") is a drilling machine for an underground buried pipe lining pipe, which is a device for carrying out the first invention, and has the following configuration. That is, the impact mechanism 12 is provided on the rotary drive shaft 16 rotated by the drive motor 11, and the impact mechanism 12 vibrates outside the machine frame 10 rotatably fitted on the rotary drive shaft 16. A stopper 32 for obtaining thrust is attached, and a cutting tool 76 is attached to the tip of the rotary drive shaft 16.

In the first and second inventions described above, the drive motor 11 may apply the rotational driving force either internally or externally. Further, it does not matter whether the rotary drive shaft 16 is provided with a universal joint. Further, the cutting tool 76 may be fixed or freely opened and closed.

A third (hereinafter referred to as "third invention") underground lining pipe piercing machine is an invention of a further embodied device, and has the following configuration. That is, in the drive unit 1, the impact mechanism 12 is provided on the rotary drive shaft 16 rotated by the drive motor 11, and the overhanging device 20 having the stopper 32 at the tip end is mounted on the outside of the machine casing 10 by the cylinder mechanism. As a result, the intermediate support unit 2 is the rotary drive shaft 16 of the drive unit 1.
Has a rotary shaft 40 that is interlocked via a universal shaft joint 4, a support main body 42 is rotatably fitted on the rotary shaft 40, and is expanded and contracted by a cylinder mechanism that slides in the axial direction with respect to the support main body 42. An arm 50 having a wheel 52 at its tip is mounted on the rotary shaft 40 of the intermediate support unit 2 and the head unit 3 is
Body 60 having a cylinder space 63 and rotating in conjunction with the universal shaft joint 5, a piston rod 67 slidably mounted in the cylinder space 63 of the body 60, and the piston rod 67. Opening and closing by moving forward and backward of the cutting bit 76 at the tip
And a bite holder 75 to which is attached.

(2) Action Regarding the first and second inventions, the cutting tool 76 requires pressing force against the lining pipe to be drilled, but the stopper 32
Is pressed against the inner surface of the mounting pipe with vibration, a forward thrust is generated and this pressing force is obtained. at the same time,
The impact torque increases the cutting force of the cutting tool 76.

The piercing of the lining pipe by the punching machine of the third invention is performed as follows.

Contracting each cylinder mechanism of the punching machine (that is, in motion)
Insert it into the mounting pipe from the ground while keeping it. The punching machine is divided into three parts and is connected by the universal shaft joints 4 and 5, so that it follows the curvature of the mounting pipe well and reaches the main pipe part.

When the tip of the head portion 3 reaches the main portion, each cylinder mechanism is extended (that is, out operation), and the extension device 20 of the drive portion 1, the arm 50 of the intermediate support portion 2, and the head portion 3 are extended.
Each of the bite holders 75 is expanded. This allows
The stopper 32 of the overhanging device 20 of the drive unit 1 is pressed against the inner wall surface of the mounting pipe, and the wheel 52 at the tip of the arm 50 of the intermediate support unit 2 is pressed against the inner wall surface of the mounting pipe to maintain the center position of the head portion 3. None, and the cutting tool 76 of the tool holder 75 of the head part 3 is expanded to a predetermined diameter.

Due to the driving of the drive motor 11, its rotation increases the rotational torque via the impact mechanism 12, and a forward pressing force is applied to the overhanging device 20 of the drive unit 1 to obtain a cutting tool 76 at the tip of the tool holder 75. To pierce the main section.

When the boring is completed, the cylinder mechanism is contracted again, and the boring machine is pulled out from the mounting pipe in accordance with the inserting operation.

(3) Example An example of the present invention will be described with reference to the drawings.

1 to 9 show an embodiment thereof. That is, the first
The figure shows a schematic drawing of the invention applied to a sewer pipe, the second
Figures 9 to 9 show details of each part.

In the figure, P is a main sewer pipe, and R is a lining pipe newly installed in the main sewer pipe P. When the lining pipe R is installed in the sewer main pipe P, the backfill filler Q such as cement milk is filled in these gaps. The mounting pipe S connects the rainwater basin T arranged between the gutters on the ground and the sewer main P, and the rainwater / sewage collected in the gutter is sewer main P
Pour inside. Usually, the mounting pipe S is connected with a curvature into the sewer main pipe P.

The perforator H is arranged in the mounting pipe S. Further, a power source and an air pressure source connected to the punching machine H are arranged on the ground. Preferably, these are mounted on a vehicle and unitized.

The punching machine H includes a drive shaft 1, an intermediate support portion 2, and a punching head portion 3 as main parts, and includes universal shaft couplings 4 and 5 that flexibly connect these components.

Further, the guide hose 6 is connected to the mounting portion 7 at the rear of the punching machine H from the ground portion.

Drive Unit The drive unit 1 (see FIG. 2 to FIG. 4) applies a rotational force to the rotary drive shaft mechanism by the rotary power and increases the rotary torque by an impact mechanism interposed in the rotary drive mechanism. By utilizing the vibration generated by the impact mechanism, the pushing-out force to the front is obtained by the overhanging device which is attached to the machine frame so as to be able to extend and contract.

The front portion 10a of the machine frame 10 of the drive unit 1 forms a housing portion, and the rear portion 10b forms a cover portion. The housing portion 10a has a hexagonal shape, and the rotation drive shaft mechanism is housed in the hollow portion of the housing portion 10a.
The motor 11 is housed in 10b.

An electric induction motor is used as the motor 11.

In a housing portion 10a of the machine frame 10, an impact mechanism 12 and a rotary shaft 16 that constitute a rotary drive shaft mechanism are rotatably supported by bearings and sealed by an oil seal.

The motor rotating shaft 11a of the motor 11 is a housing portion 10a of the machine casing 10.
It projects into the inner hollow portion and is connected to the impact mechanism 12.

The impact mechanism 12 has a collar 13a at the rear part of the rotary shaft 13, and a hammer 14 is fitted to the front part so as to be slidable in the axial direction (spline engagement). A coil spring 15 is mounted around the rotating shaft 13 between the collar 13a and the hammer 14 to urge the hammer 14 forward.

A rotary shaft 16 is arranged on the same axis line so as to be continuous with the rotary shaft 13.
At the rear part of this rotary shaft 16, there is a striking receiving member which is in abutting engagement with the hammer 14.
17 is attached.

The hammer 14 tries to rotate with the rotation of the rotary shaft 13, but is stopped by the projection of the striking pad 17 to stop the rotation, and strikes the projecting portion every time it gets over the bump, and hits the striking pad 17 and then the rotating shaft 16. give. As a result, the rotational torque of the rotary drive mechanism increases.

An overhanging device 20 is arranged outside the housing portion 10a of the machine frame 10 with the following configuration.

That is, the cylinder fixing brackets 21 are arranged at three circumferential positions on the outer surface of the housing portion 10a, and the air cylinders 22 are fixed to the respective brackets 21. A ring body 25 that is loosely fitted to the outside of the housing portion 10a is fixed to the piston 23 of the air cylinder 22. When the compressed air in and out of the air cylinder 22 moves in and out, the piston 23 moves forward and backward, causing the ring body 25 to move forward and backward (direction of FIG. 2 and FIG. 4A). Brackets 26 are formed on the back surface of the ring 25 at three locations.

Brackets 27 and 28 for fixing the arm are brackets 2 of the ring 25.
Corresponding to 6, fixed between the air cylinders 22 adjacent to each other at the front and rear of the housing portion 10a. Brackets 27 and 28 have arms 30 and 3 that pivotally cross each other with pins 29.
One end of 1 is pivotally supported, and the other ends of the arms 30 and 31 are stoppers 32.
Is pivotally supported by brackets 33 and 34 fixed to the inside of the. Sliding grooves 27a and 33a are formed in the brackets 27 and 33 in the axial direction.

The arm 3 is attached to the shaft 26a attached to the bracket 26 of the ring 25.
0 is pivotally supported, and this shaft 26a is mounted on the sliding device 27 of the bracket 27.
accommodated in a. With this, as the annulus 25 moves forward and backward,
When the arms 30 and 31 are raised, the stopper 32 is expanded and contracted in the radial direction (direction of FIG. 2 and FIG. 4B).

The outer surface of the stopper 32 is formed into a saw-like uneven shape,
When it is pressed against the inner wall surface of the mounting pipe S, a forward driving force is obtained by the addition of vibration.

In the above configuration, the air cylinder 22, the ring body 25, the arm
30, 31 and the stopper 32 form a main part of the overhang device 20.

A mounting part 7 arranged at the rear part of the drive part 1 is connected to a guide hose 6 guided from the above-ground part, and simultaneously connects a compressed air conduit housed in the hose 6 and an electric wiring. Is.

That is, the mounting portion 7 is composed of the out manifold 35 and the in manifold 36. These manifolds 35,3
6 is a disk body having circular holes 35a, 36a in the center, and is airtightly connected through a packing 37, and the outer and inner air passages 35 are
It communicates with b and 36b. These air passages 35b, 36b have three outlets, respectively, and are distributed from these outlets to the respective air passages of the perforator H via appropriate air conduits.

The mounting portion 7 and the machine frame 10b are connected by a leaf spring 38.

The hose 6 is fitted around the outer periphery of the small-diameter outlet manifold 35.

The compressed air conduits (for out and in) housed in the hose 6 are connected to the manifold air passages 35b, 36b and through the manifold circular holes 35a, 36a and the machine frame 10b end plate circular hole 10c. And is guided to the cylinder mechanism of each pneumatic actuator. Further, the electric wiring accommodated in the hose 6 is also connected to the motor 11 through the circular holes 35a and 36a of the manifold and the circular hole 10c of the machine frame through the appropriate connector.

Intermediate Support Unit The intermediate support unit 2 (see FIGS. 5 and 6) is the drive unit 1.
Is interposed between the head portion 3 and the head portion 3 to smoothly transmit power of the rotary drive shaft mechanism of the punching machine H and maintain the center position of the tip portion of the head portion 3 in the mounting pipe S.

The rotary shaft 40 at the center of the intermediate support portion 2 is interlocked with the rotary shaft 16 of the drive portion 1 via the universal joint 4. The universal shaft coupling 4 and the rotary shaft 40 are included in a part of the rotary drive shaft mechanism.
A cylindrical support body 42, which has been turned off, is fitted through bearing bushes 41 arranged in front of and behind the rotary shaft 40.

An annular piston ring body 43 is fixed to the rear part of the support body 42 in an airtight manner, and a movable cylinder 45 is slidably mounted on the support body 42 so as to surround the piston ring body 43. 46 is a lid of the movable cylinder 45.

In the movable cylinder 45, an out air passage 45a and an in air passage 45b connected to the compressed air conduit are formed in different systems, and the out air passage 45a is guided to the cylinder space in the front part of the annular piston 43, The in-air passage 45b is guided to the cylinder space behind the annular piston 43.

As shown in the drawing, a scraper and an O-ring are attached to the sliding portions of the support body 42, the piston ring 43, the movable cylinder 45, and the cylinder lid 46 to prevent dust from entering and airtightness.

Brackets 48 are fixed to the front portion of the support main body 42 at three positions at equal intervals in the circumferential direction, and correspondingly, movable cylinders are provided.
A bracket 49 is also attached to the front of the 45. A long groove 49a is formed in the bracket 49 in an oblique direction. The arm 50 has shafts 50a, 50b, 50c in the outer diameter direction from the central axis,
The shaft 50a is fitted in the long groove 49a of the bracket 49, and the shaft 50b is pivotally supported by the bracket 48. Shaft 50a is a movable cylinder 45
As the bracket 49 moves forward and backward (direction C in FIG. 5), the arm 50 swings about the shaft 50b (direction D in FIG. 5) by sliding in the long groove 49a.

A wheel carrier 53 having wheels 52, 52 is mounted on the shaft 50c of the arm 50 while allowing some swing.

With this configuration, when compressed air is introduced into the front cylinder space through the out air passage 45a, the movable cylinder 45
Moves forward, the shaft 50a of the arm 50 is drawn inward of the long groove 49a of the bracket 49, and the arm 50 moves about the shaft 50b.
Will be projected outward (state shown in FIG. 5). As a result, the vehicle support installed over the rotating shaft 40 in three directions
The wheels 52 of 53 are pressed against the inner wall surface of the mounting pipe S to hold the center of the head portion 3 at the tip of the punching machine H.

When compressed air is introduced into the rear cylinder space through the in-air passage 45b, the movable cylinder 45 moves rearward, and the shaft 50a of the arm 50 is displaced outward of the long groove 49a of the bracket 49. The arm 50 is pulled inward about the axis 50b (shown by a chain line in Fig. 5). The wheel 52 is located at the outermost side of the punching machine H even when the arm 50 is retracted.

The universal shaft joint 4 includes a joint member 55 fitted and fixed to the end of the rotary shaft 16 and a joint member 56 fitted and fixed to the end of the rotary shaft 40.
And the link member 5 interposed between these joint members 55 and 56.
It consists of 7 and. That is, the end portions of the joint members 55 and 56 are divided into two forks, these are arranged orthogonally to each other, and the cross-shaped link member 57 is swingably attached to these two forks. The universal joint 4 has a known structure. As a result, the rotary drive shaft smoothly transmits the rotation according to the curvature of the mounting pipe S.

Head Part The head part 3 (see FIGS. 7 and 8) is for punching with a cutting tool which can be opened by receiving a driving force from the rotary driving shaft mechanism.

The main body portion 60 of the head portion 3 is interlocked with the rotary drive shaft mechanism via the universal shaft coupling 5 and is composed of a rotary shaft portion 61 and a rotary cylinder portion 62. A cylinder space 63 is formed at a connecting portion between the rotating shaft portion 61 and the rotating cylinder portion 62.

A coupling 65, which is connected to a compressed air conduit, is rotationally cut off and fitted airtightly to the rotary shaft 61. The coupling 65 remains stationary.

An out air passage 65a and an in air passage 65b are formed in the coupling 65, and the out air passage 65a is formed in the rotation shaft portion 61 of the main body portion 60.
Communicate with. The end portion of the air passage 61a for OUT opens to the rear portion of the cylinder space 63. Also, the in-air passage 65b
Communicate with the in-air passages 61b, 62b formed in the rotary shaft portion 61 and the cylinder portion 62 of the main body portion 60. In air passage 6
The end of 2b opens to the front of the cylinder space 63.

The piston rod 67 is composed of a piston 68 and a rod 69, and moves the piston 68 housed in the cylinder chamber 63 to move the rod.
Move 69 forward and backward (in the direction of Fig. 7E). An operation fitting (knuckle) 70 including a disc body 71 is attached to the tip of the rod 69, and has a tapered surface 70a and a vertical wall 70b.

Brackets 72 are stretched at 90 ° intervals at the tip of the rotary cylinder portion 62, and a bite holder 75 is pivotally supported on the bracket 72 by a shaft 74. The bite holder 75 has a base portion 75a formed in an arc shape and has a shaft hole 75b through which the shaft 74 is inserted.
Are formed in two steps.

The cutting tool 76 is detachably attached to the tool holder 75. As the piston rod 67 moves forward and backward, the operating bracket 70
Tool holder sandwiched between taper surface 70a and vertical surface 70b
When the base 75a of 75 is pushed, the bite holder 75 swings around the shaft 74 (direction toward FIG. 7). 77 is a stopper using an adjusting screw.

At the tip of the bite holder 75, a wheel bridge 79 pivotally supporting a wheel 78 is fixed by a stopper so as to be detachable. The wheel 78 guides the inner wall surface of the mounting pipe S without damaging the inner wall of the mounting pipe S when the bite holder 75 is expanded.

With this configuration, when compressed air is introduced into the rear cylinder space 63 via the out air passages 65a and 61a, the cylinder 68 and thus the piston rod 67 are pushed forward. By the forward movement of the piston rod 67, the taper portion 70a of the operation fitting 70 pushes out the base portion 75a of the bite holder 75 and pushes and expands the bite holder 75 outward about the shaft 74 (state of FIG. 7).

When compressed air is introduced into the front cylinder space 63 via the in-air passages 65b, 61b, 62b, the cylinder 68 retracts. When the piston rod 67 is retracted, the disc portion 70b of the operation fitting 70 pulls in the base portion of the bite holder 75 and pulls the bite holder 75 inward (indicated by a chain line in FIG. 7).

The structure of the universal shaft joint 5 conforms to that of the universal shaft joint 4. That is, the shaft joint 80 is attached to the end of the rotating shaft 40, and the shaft joint 81 is attached to the end of the rotating shaft 61. A link member 82 is swingably supported between these shaft couplings 80, 81.

Pneumatic Circuit FIG. 9 shows the pneumatic circuit used in the punching machine H.

The compressor or the switching valve is arranged on the ground, and the out conduit and the in conduit branching from the switching valve are housed in the hose 6, the ends of which are respectively the outlet manifold 35 and the inlet manifold 36 of the mounting portion 7. Connected to. From each of the manifolds 35, 36 to the pneumatic actuator in the punching machine H (that is, the air cylinder 22 of the drive unit 1, the movable cylinder 45 of the intermediate support unit 2, and the main body unit 60 of the head unit 3).
Is connected to the out air passage and the in air passage.

It can be seen from the figure that the out and in pneumatic actuations are performed simultaneously by switching the switching valve.

In addition, although the solenoid valve is used as the switching valve in the drawing, it goes without saying that it can be manually operated. By using the electromagnetically operated valve, it is possible to automate the operation via the control unit (relatively including the control unit) by receiving the detection signal of the sensor appropriately arranged in the punching machine H.

Operation of the punching machine The punching work performed using the punching machine H will be described.

Hereinafter, it demonstrates according to a construction procedure.

(1) On the ground, the punching machine H is connected to the electric wiring and the compressed air conduit. That is, the electrical wiring and the two compressed air conduits for out and in are connected to the guide hose 6
It is housed inside and these ends are set via a mounting part 7.

(2) When the compressor is started, the switching valve is switched so that air pressure is sent to the in-air passage, and each cylinder of the perforator H is stored (that is, in-operation). As a result, the overhanging device 20 of the drive unit 1, the arm 50 of the intermediate support unit 2, and the bite holder 75 of the head unit 3 are contracted.

(3) Attach the pipe S from the rainwater basin T to the perforator H in this state.
Insert inside. The punching machine H enters the mounting pipe S by its own weight and the pushing force of the hose 6. At this time,
The punching machine H is divided into three parts, and can be flexibly bent by the universal shaft couplings 4 and 5, so that the mounting pipe S can be smoothly inserted without being caught by the small curvature. Further, although the arm 50 of the intermediate support part 2 is in a contracted state (the fifth
Since the wheel 52 mounted on the wheel bridge 53 at the tip of the arm 50 projects outward, the boring machine H rolls smoothly by the wheel 52.

(4) Cutting bite at the tip of the punching machine H as the approach further progresses
76 collides with the surface of the lining pipe R or the backfill material Q installed in the main sewer pipe P and stops. In this state, the guide hose 6 is pulled, and the punching machine H is slightly pulled back.

(5) In the above state, the switching valve of the pneumatic circuit is switched to send compressed air to the air passage for out, and each cylinder of the perforator H is extended (that is, out operation).

As a result, the overhanging device 20 of the drive unit 1 is expanded, and the stopper 32 at the tip thereof is pressed against the inner wall surface of the mounting pipe S. Further, the arm 50 of the intermediate support portion 2 expands and is pressed against the inner wall surface of the mounting pipe S by the wheel 52 at the tip thereof.
Further, the bite holder 75 of the head portion 3 is expanded, and the cutting tool 76 is expanded to a predetermined diameter.

(6) Next, the electric motor 11 of the drive unit 1 is driven. As a result, the motor rotating shaft 11a rotates and the shaft 1 of the impact mechanism 12
By turning 3, the impact action of the hammer 14 applies impact torque to the rotary drive shaft mechanism to increase the rotary torque.

The vibration generated by the impact mechanism 12 is the overhang device of the drive unit 1.
The thrust is transmitted to the stopper 32 at the end of 20, and the thrust causes the main punch H to be pushed forward.

In the intermediate support part 2, the support body 42 is a rotary shaft.
Since the rotation with respect to 40 is cut off, the arm 50 maintains a fixed position and holds the center position of the head unit 3.

The impact torque introduced into the rotary drive shaft mechanism described above is transmitted to the main body portion 60 of the head portion 3 to rotate the bite holder 75,
Back-filling material Q by cutting tool 76 attached at the end
And, open a circular hole in the lining pipe R.

(7) When the backfill material Q and the lining pipe R are perforated,
The perforated piece is dropped inside the lining pipe R, and the electric motor 11
Is turned off and the drilling work is stopped.

(8) The switching valve of the pneumatic circuit is switched to introduce compressed air into the in-air passage to contract each cylinder of the perforator H. Then, the hose 6 is pulled to lift the punching machine H from the inside of the mounting pipe S.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

The drive motor 11 is not limited to the electric motor, and other appropriate motors,
For example, a pneumatic motor or a hydraulic motor can be used. Then, when an air pressure motor is used, the drive pressure source is branched from the compressor shown in FIG. 9 through the three-point set shown in the drawing, and is guided to this air pressure motor through another switching valve. It is possible to use the same drive source, which is convenient. Further, it is possible to adopt an external drive in which the drive motor is provided outside the ground or the like and is connected to the rotary shaft 13 via the flexible shaft.

The bite holder 75 of the head portion 3 is not limited to four as shown in the figure, but may be three 120 ° phase or two 180 ° phase.

Further, as the cutting means of the head portion 3, it is possible to use thermal fusing regardless of the cutting tool method.

C. Effect of the present invention The present invention having the above-mentioned configuration and having the operation has the following unique effects.

According to the present invention, since the position is held and the thrust is obtained by the stopper, it is possible to perform the drilling work in the pipe without the scaffold, and it is possible to perform the drilling work not only in the mounting pipe but also in other pipes.

By providing the rotary drive shaft with the impact mechanism, the cutting torque of the cutting tool is increased, and in addition, the driving force is obtained by the vibration of the stopper, so that the cutting can be reliably performed.

According to the punching machine of the third aspect of the invention, the curvature of the mounting pipe can be followed well, and the mounting pipe can be used as it is.
It is economical because it does not require ground excavation work.

Since it is operated from the rainwater basin on the ground surface, the work space on the ground surface is wider and the operation is easier than that of drilling from inside the lining pipe.

Since the mounting pipe is directly drilled into the lining pipe, no detection mechanism is required, and the mechanism can be simplified accordingly.

[Brief description of drawings]

Drawing shows an embodiment of a drilling machine for lining pipe of the present invention,
FIG. 1 is a schematic view of a drilling work performed using this punching machine, FIG. 2 is a vertical cross-sectional view of a drive unit, FIG. 3 is an exploded perspective view of an impact mechanism in the drive unit, and FIG. 4 is a drive unit. 3 is a three-dimensional view of the overhang device in FIG. 5, FIG. 5 is a vertical cross-sectional view of the intermediate support portion,
6 is a front view of FIG. 5 (a view in the X direction), FIG. 7 is a longitudinal sectional view of the head portion, FIG. 8 is a front view of the FIG. 7 (a view in the Y direction), and FIG. FIG. 4 is a pneumatic circuit diagram of the punching machine. 1 ... Drive part, 2 ... Intermediate support part, 3 ... Drilling head part, 4,5 ... Universal shaft joint, 10 ... Machine frame, 11 ... Drive motor, 12 ... Impact mechanism, 16 ... Rotational drive shaft, 20 …… Overhang device, 32 …… Stopper, 40 …… Rotation shaft, 42 …… Support body, 50 …… Arm, 52 …… Wheel, 60 …… Main body part, 63
…… Cylinder space, 67 …… Piston rod, 75 …… Bite holder, 76 …… Cutting tool

Claims (3)

[Claims] 1. A rotary drive shaft (16) driven by a drive motor (11).
The impact mechanism (12) that drives the
Impact torque is applied to the rotary drive shaft (16) by means of which the thrust torque is applied to the stopper (32) attached to the machine frame (10) by the vibration due to the impact torque, and the thrust torque is applied via the rotary drive shaft (16). A method for perforating an underground buried pipe lining pipe, characterized by driving a cutting bite (76) attached to the tip of the rotary drive shaft (16) to perforate the pipe. 2. A machine frame (rotatably fitted on the rotary drive shaft (16), wherein an impact mechanism (12) is provided on the rotary drive shaft (16) rotated by the drive motor (11). 1
A stopper (32) that obtains thrust by the vibration of the impact mechanism (12) is attached to the outside of (0), and a cutting tool (76) is attached to the tip of the rotary drive shaft (16). Characteristic drilling machine for underground buried pipe lining pipe. 3. The drive unit (1) has a rotary drive shaft (16) rotated by a drive motor (11) with an impact mechanism (12) interposed, and a cylinder mechanism provided outside the machine casing (10). An overhanging device (20) which is expanded and contracted and has a stopper (32) at the tip is mounted, and the intermediate support part (2) has a universal shaft joint (4) attached to the rotary drive shaft (16) of the drive part (1). A cylinder mechanism that has a rotating shaft (40) interlocked with it via which a support body (42) is rotatably fitted on the rotating shaft (40) and slides in the axial direction with respect to the support body (42). And an arm (50) having a wheel (52) at its tip end is mounted by the head part (3) via the universal joint (5) to the rotary shaft (40) of the intermediate support part (2). Body part (60) that rotates in conjunction with each other and has a cylinder space (63), and a cylinder of the body part (60) It consists of a piston rod (67) slidably mounted in the space (63), and a bite holder (75) that opens and closes by the forward and backward movement of the piston rod (67) and has a cutting bite (76) attached to the tip. A drilling machine for underground buried pipe lining pipe, which is characterized by: