JP3188152B2 - Small diameter pipe thruster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connecting member of a small-diameter pipe propulsion machine which facilitates a connection operation of a small-diameter pipe, and a method of attaching and detaching the pipe connecting member.

[0002]

2. Description of the Related Art FIG. 1 is an overall side view of a small-diameter pipe propulsion machine. It is installed. Inside the buried pipe 1, a casing 4 in which a screw conveyor for transporting earth and sand excavated by the cutter head 3 backward is disposed. Reference numeral 10 denotes a propulsion device installed in the starting shaft 5, which protrudes underground while sequentially connecting the buried pipe 1 and the casing 4 divided for each unit length. The propulsion device 10 includes a driving device 11 for driving the cutter head 3 and the screw conveyor, and a propulsion cylinder 13 for propelling the buried pipe 1 via a pressing plate member 12.
Is provided. Along the outer peripheral surface of the casing 4,
A pipe 6 through which air, water and pressure oil to be sent to the leading end pipe is laid is connected to a pipe 15 from a control unit 14 disposed on the ground via a connecting member 7.

FIG. 12 is a side view showing a conventional connecting device for connecting a connecting member 70 to a casing 71. The buried pipe 1 is propelled by a push plate member 72. The push plate member 72 has a through hole 73 through which the rear end of the casing 71 is inserted.
A connecting member 7 connected to the pipe 15 from the control unit 14 shown in FIG.
0 is mounted, and the connection member 70 is connected to the drive device 11 by a connection cylinder 74. Since the connection member 70 is heavy and difficult to move by human power, the axial movement is limited to the connection cylinder 74.
Is performed by expansion and contraction. A pipe 77 is laid along the outer peripheral surface of the casing.

FIG. 13 shows a pipe connecting portion between a casing 71 and a connecting member 70. The connecting member 70 is provided with a stud bolt 75 and a nut 7 provided on an end face of the casing 71.
6 and fastened. The pipe 77 laid along the outer peripheral surface of the casing 71 is connected to the flange 71 of the casing 71.
a, and is connected to a joint 78 formed of a quick coupler provided on the connection surface with the connection member 70. The joint 78 includes a male joint 78 a connected to the pipe 77 and a female joint 78 b connected to the pipe 15, and is automatically connected when the casing 71 and the connection member 70 are connected. When connecting the casing 71 and the connection member 70, the connection member 70 is moved in the axial direction by extending the connection cylinder 74, and the connection member 70 is brought into contact with the end face of the casing 71 and fastened by the nut 76. . In that case, the pipe 77 and the pipe 15 are automatically connected as described above.
When removing the connecting member 70 from the casing 71,
After the nut 76 is removed, the connecting cylinder 74 is contracted and the connecting member 70 is moved in the axial direction to be removed.

[0005]

However, according to the above structure, since the connecting member is connected to the driving device by the connecting cylinder, there is no freedom in the vertical and horizontal movement in the plane perpendicular to the axis. The positioning operation when connecting to the casing is difficult, and the connection takes time. In addition, a connection cylinder dedicated for connection is required, and there is a problem that the structure is complicated and the cost is high.

[0006] The present invention has been made in view of the above problems, and the positioning between the casing and the connecting member is easy.
It is an object of the present invention to provide a piping device of a small-diameter pipe propulsion device having a simple structure and a method of attaching and detaching the piping device.

[0007]

According to the present invention, there is provided a small-diameter pipe propulsion apparatus according to the present invention, comprising: a front pipe having a cutter head at a tip and a screw conveyor provided behind the cutter head; A buried pipe sequentially connected behind the front pipe, a screw conveyor behind the front pipe and sequentially connected inside the buried pipe, and for propelling the buried pipe underground,
A propulsion device installed in the starting shaft, a pressing member provided in front of the propulsion cylinder to transmit the pressing force of the propulsion cylinder of the propulsion device to the buried pipe, and a pipe installed along the casing outer peripheral surface of the screw conveyor And a connecting member for connecting a pipe from a control unit installed behind the buried pipe, wherein the connecting member is detachably provided on a pressing member of the buried pipe.

The connecting member can be removably attached to the push plate member via a temporary fixing member, and can be slidably inserted into a casing insertion through hole provided in the push plate member. Also, a connection part of the pipe from the control unit, a joint part with the pipe installed in the casing, a positioning part with the casing, and a positioning guide part with the connection part and the push plate member, and The temporary fixing member may include an engaging portion with a temporary fixing member, and an earth discharging hole, and the temporary fixing member is provided on an engaging portion of a positioning plate fixed to the pressing plate member and on the connecting member. It is also possible to comprise a temporary fixing member engaging portion, a temporary fixing pin for connecting the engaging portion of the positioning plate and the temporary fixing member engaging portion, or a temporary fixing key.

The positioning portion between the connecting member and the casing includes a knock pin and a pin hole, and either the knock pin or the pin hole may be installed on the connecting member. A guide fixed to the pressing plate member and guiding the casing with respect to the pressing plate member may be provided.

In the method of attaching and detaching the pipe connecting member in the small-diameter pipe propulsion device, the method of attaching the connecting member to the casing is as follows: (1) With the connecting member connected to the push plate member by the temporary fixing member, (2) (3) The push plate member is propelled to extend the propulsion cylinder so that the connecting member abuts on the casing. (3) After connecting the connecting member to the casing, the temporary fixing member is removed. Is further extended and the buried pipe is propelled, and the method for removing the connecting member from the casing is as follows: (1) After the propulsion of the buried pipe is completed, the fixed portion between the connecting member and the casing is opened to propell the buried pipe. Retract the push plate member by contracting the cylinder,
After the push plate member and the connection member are connected by the temporary fixing member, or (2) after the completion of the propulsion of the buried pipe, the propulsion cylinder is contracted to retract the push plate member, and the push plate member and the connection member are connected. (3) The propulsion cylinder is further contracted to retract the push plate member by one stroke of the buried pipe, after connecting by the temporary fixing member and opening the fixing portion between the connection member and the casing. The method of attaching and removing the connecting member may be alternately repeated.

[0011]

Since the small-diameter pipe propulsion device according to the present invention has the above-described configuration, the connection member and the push plate member are brought into contact with the casing by extending the propulsion cylinder with the connection member and the push plate member connected. Promote until contact. When the connecting member is connected to the casing while the connecting member is in contact with the casing, the pipe from the control unit is connected to the pipe installed along the outer peripheral surface of the casing, so that the cutter of the leading conduit is driven by the control unit. Is done. In this state, when the connection between the connection member and the push plate member is released and the propulsion cylinder is further extended while driving the cutter of the leading conduit by the control unit, the buried pipe is propelled by the push plate member.

After the propulsion of one buried pipe is completed, the connection between the connection member and the casing is released, the propulsion cylinder is contracted, the push plate member is retracted, and the push plate member and the connection member are connected by the temporary fixing member. Thereafter, the propulsion cylinder is further contracted, the push plate member is retracted by one stroke of the buried pipe, the next buried pipe and the casing are set in front of the push plate member, and the same operation as described above is repeated. In order to release the connection between the connection member and the casing, after completion of the propulsion of one buried pipe, the propulsion cylinder was contracted to retract the push plate member, and the push plate member and the connection member were connected by a temporary fixing member. Later, the connection between the connection member and the casing may be released, and the propulsion cylinder may be further contracted to retract the push plate member by one stroke of the buried pipe.

The connection member and the pressing plate member are detachably connected and released by a temporary fixing member. Since the connection member is slidably inserted into a casing insertion through-hole provided in the push plate member, from when the connection member is connected to the casing until the push plate member starts to propel the buried pipe. After the completion of the propulsion of one buried pipe, the push plate member is retracted, and the connection member is connected to the push plate member in the through hole until the push plate member and the connection member are joined by the temporary fixing member. Slide against it.

Since the guide fixed to the push plate member and guiding the casing to the push plate member is provided, the casing is guided by the guide when the connecting member is connected to the casing by extending the propulsion cylinder. Then, the connection member and the casing are automatically and reliably positioned.

When the connection member is connected to the casing, a pipe from the control unit is connected to a pipe provided on the casing. Further, when the connecting member is connected to the casing by the connecting portion, the positioning is accurately performed by the positioning portion. In addition, the positioning guide portion of the connection member is securely positioned with the pressing plate member, and a temporary fixing pin, a temporary fixing key or the like is temporarily provided between the engaging portion of the connecting member and the engaging portion fixed to the pressing plate member. It is connected by a member. Further, the earth and sand conveyed in the casing is discharged from a discharging hole of the connection member.

The connecting member and the casing are accurately aligned by the knock pin or the pin hole provided in the connecting member, and the pin hole or the knock pin provided in the casing which engages with the knock pin or the pin hole. The connection member and the casing are accurately positioned by a guide fixed to the push plate member and guiding the casing to the push plate member.

In the method for removing the connecting member from the casing, after the propulsion of the buried pipe is completed, the connection between the connecting member and the casing is released, and then the propulsion cylinder is contracted and the push plate member is retracted, so that the connection member is removed. The temporary fixing member is automatically engaged between the mating portion and the engaging portion fixed to the push plate member, and the push plate member and the connection member are connected. Further, after the propulsion of the buried pipe is completed, the propulsion cylinder is contracted to retract the push plate member, and when the engagement portion of the connection member and the engagement portion fixed to the push plate member are aligned, the propulsion cylinder is contracted. The stop may be stopped, and the pressing plate member and the connecting member may be connected by a temporary fixing member.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for attaching and detaching a small-diameter pipe propulsion device and a pipe connecting member according to the present invention will be described below in detail with reference to the drawings.

FIG. 2 is a sectional view taken along the line AA of FIG. 1, and is a front view of the first embodiment of the piping apparatus in which the push plate member and the connecting member are combined. In the center of the push plate member 12, a through hole 20 through which the casing 4 shown in FIG.
Are slidably inserted. The connection member 7 is provided with a pipe 40 connected to the pipe 15 from the control unit 14 shown in FIG. Propulsion cylinders 13 are connected to both wings of the push plate member 12.

FIG. 3 is a detailed front view of the connecting member 7, and FIG. 4 is a perspective view of the connecting member 7. Guide portions 30, 30 are provided above and below the left and right wings of the connection member 7, and the push plate member 1 is provided.
Guide portions 2 provided on the left and right sides of the two through holes 20
1, 21 are slidably inserted. Grooves 3 which are engaging portions for temporary fixing members are provided on the left, right and upper sides of the connecting member 7.
There are provided bars 32, 32 having three. A predetermined gap is provided between the connecting member 7 and the through hole 20 of the pressing plate member 12, and the bar 32 also serves to prevent falling, and the connecting member 7 is aligned with the casing 4 in a plane perpendicular to the axis. The required amount can be moved. Fall prevention guides 31 are provided on the left, right, and lower sides of the connection member 7 to prevent the connection member 7 from falling in the front-rear direction when the connection member 7 is inserted into the guide portions 21 of the push plate member 12. Discharge holes 34 for discharging earth and sand carried out from the screw conveyor are provided at the center of the connection member 7, and bolt holes 35 are provided at four corners.

Although not shown, a joint 78 of a quick coupler similar to the conventional one shown in FIG. 13 attached to the end of the pipe 40 is installed in the pipe hole 36 provided around the discharge hole 34. Is established. Guide portions 21 of push plate member 12
Positioning plates 22, 22 are fastened to the left, right, and upper portions by bolts 23, 23.
2 is provided with a pin hole 24 which engages with a groove 33 provided in a bar 32 of the connecting member 7. The connecting member 7 has the guide portion 30 inserted into the guide portion 21 of the through hole 20, and after the pin hole 24 of the positioning plate 22 is aligned with the groove 33 of the bar 32 of the connecting member 7, is temporarily fixed by the temporary fixing pin 41. Is done.

FIG. 5 is a cross-sectional view taken along the line BB of FIG. 2, which is a side cross-sectional view of the piping device, showing a state before the connection member 7 and the casing 4 are connected. As described with reference to FIG. 3, the guide portion 30 of the connection member 7 is inserted into the guide portion 21 of the through hole 20 of the push plate member 12, and the temporary fixing pins 41 are inserted into the positioning plate 22 and the bar 32 of the connection member 7. Is inserted, and the connecting member 7 is temporarily fixed to the pressing plate member 12. Connection member 7
Is provided with a pipe 40, and the casing 4 is provided with a pipe 6.

FIG. 6 is a rear view of the push plate member 12, as viewed in the direction of the arrow DD in FIG. Connection guides 60 are fastened by bolts 61 in alignment with guide portions 21 provided on both sides of the through hole 20 of the push plate member 12.
Guide portions 50, 50 provided at the ends of the casing 4 are slidably inserted into the connection guides 60, 60. A press ring 62 is fixedly mounted on the outer periphery of the buried pipe 1 to contact the end face of the buried pipe 1 when the buried pipe 1 is propelled.

FIG. 7 is a view taken in the direction of the arrow C in FIG. 3, and is a top view of the first embodiment of the piping device. The state where the positioning plate 22 and the groove 33 of the connection member 7 are temporarily fixed by the pin 41 is shown. The connection member 7 is provided with two knock pins 37, and is engaged with a knock pin hole 51 provided in the casing 4 to perform positioning for connection.
A stud 52 is provided on the end face of the casing 4 so as to match the bolt hole 35 of the connecting member 7 shown in FIG.

When attaching the connecting member 7 to the casing 4, the operation is performed in the following order. (1) As shown in FIG. 5, the guide portion 30 of the connecting member 7 is inserted into the guide portion 21 of the through hole 20 of the push plate member 12, and the pin hole 2 of the positioning plate 22 attached to the push plate member 12 is inserted.
4 is aligned with the groove 33 of the bar 32 of the connecting member 7 and temporarily fixed by the temporary fixing pin 41. (2) Next, the propulsion cylinder 13 of the propulsion device 10 is extended to advance the push plate member 12. At this time, the guide portion 50 on the end surface of the continuation cylinder 4 is slidably inserted into and guided by the connection guide 60 attached to the push plate member 12. (3) When the push plate member 12 is further advanced, the casing 4
The stud 52 is inserted into the bolt hole 35 of the connection member 7, and the knock pin 37 of the connection member 7 is fitted into the knock pin hole 51 of the casing 4. The alignment of these positions is such that the connecting member 7 can be moved by a required amount in the plane perpendicular to the axis, and the connection guide 60 and the guide portion 21
This is done automatically by providing. (4) Next, as shown in FIG. 8, the end surface of the connection member 7 is brought into contact with the end surface of the casing 4, and the connection member 7 is fastened to the casing 4 by the stud 52 and the nut 53. At this time, the pipe 6 and the pipe 40 are automatically connected. (5) Next, the temporary fixing pin 41 is removed, the propulsion cylinder 13 is extended, the push plate member 12 is advanced, and the end face of the push ring 62 is brought into contact with the end face of the buried pipe 1 as shown in FIG.
The buried pipe 1 is propelled.

When removing the connecting member 7 from the casing 4, the operation is performed in the following order. (1) After the embedding of the embedding pipe 1 is completed, the nut 53 is removed and the connection between the casing 4 and the connection member 7 is released. (2) When the temporary fixing pin 41 is inserted into the pin hole 24 of the positioning plate 22 and the pushing plate member 12 is retracted by contracting the propulsion cylinder 13, the positioning plate 2
At the position where the pin hole 24 of the second member and the groove 33 of the bar 32 of the connecting member 7 are aligned, the temporary fixing pin 41 is
The push plate member 12 and the connection member 7 are connected by the temporary fixing pins 41 to be inserted into the second grooves 33. (3) In this state, the propulsion cylinder 13 is further contracted, and the push plate member 12 is retracted by one stroke of the buried pipe, and the next buried pipe is inserted between the rear end of the existing casing 4 and the push plate member 12. And proceed to the same buried pipe propulsion process as described above.

FIG. 10 is a plan view showing a second embodiment of the piping device according to the present invention, which relates to a temporary fixing member. Temporarily fixing the positioning plates 22, 22 mounted on the pressing plate member 12 and the bars 32, 32 provided on the connecting member 7 is performed by the insertion keys 55, 55. Since the operation of the second embodiment is the same as that of the first embodiment, the description is omitted. FIG. 11 is a plan view showing a third embodiment of the piping device according to the present invention, which relates to the connection between the casing and the connection member. Dowel pin 3 for positioning casing 4 and connecting member 7
7 and 37 are attached to the end face of the casing 4, and the connecting member 7 is provided with knock pin holes 51 and 51. Since the operation of the third embodiment is the same as that of the first embodiment, the description is omitted.

[0028]

The present invention has the following effects because it has the above configuration and method. (1) Since the casing and the connecting member can be attached and detached using the existing propulsion cylinder, a dedicated cylinder for moving the connecting member in the axial direction is not required, and the piping device of the small-diameter pipe propulsion machine is greatly reduced. Cost can be reduced. (2) Since the attachment and detachment of the casing and the connecting member can be performed extremely easily using the existing propulsion cylinder, the construction period of the buried pipe propulsion construction can be shortened and the construction cost can be reduced. (3) Since the guide fixed to the pressing plate member and guiding the casing to the pressing plate member is provided, the positioning of the casing with respect to the connecting member connected to the pressing plate member is automatically and reliably performed, and the connection with the casing is established. The efficiency of the connection work with the member can be improved. (4) After connecting the connecting member to the casing and removing the temporary fixing member, the propulsion cylinder is contracted to retract the pressing plate member, and until the pressing plate member and the connecting member are connected by the temporary fixing member. Except that the temporary fixing member is removed only between the casings, the casing and the connecting member are connected by the temporary fixing member, and are constituted by an extremely simplified process.

(5) In the method of attaching and detaching the connection member to and from the casing of the piping device of the small-diameter pipe propulsion device, the connection member is connected to the casing, the temporary fixing member is removed, and then the propulsion cylinder is contracted. The casing and the connecting member are connected by a temporary fixing member, except that the temporary fixing member is removed only until the pressing plate member is retracted and the pressing plate member and the connecting member are connected by the temporary fixing member,
Since the steps are extremely simplified, the efficiency of the connection operation between the casing and the connection member can be greatly improved. (6) In the method of removing the connection member from the casing, the propulsion cylinder is contracted to retract the pressing plate member,
When the contraction of the propulsion cylinder is stopped when the engagement portion of the connection member and the engagement portion fixed to the push plate member are aligned, and the push plate member and the connection member are connected by the temporary fixing member, During the contraction of the propulsion cylinder until the joints are aligned, the stability of the connecting member is improved because the connecting member is connected to the casing. In addition, by temporarily retracting the push plate member by contracting the propulsion cylinder after releasing the connection between the connection member and the casing, a temporary fixing member is provided between the engagement portion of the connection member and the engagement portion fixed to the push plate member. Is automatically engaged,
The connection work efficiency between the connection member and the casing can be improved.

[Brief description of the drawings]

FIG. 1 is an overall side view of a small-diameter pipe thruster.

FIG. 2 is a front view of the first embodiment of the piping device of the present invention.

FIG. 3 is a detailed front view of a connecting member.

FIG. 4 is a perspective view of the same.

FIG. 5 is a side sectional view of the piping device, showing a state in which a pressing plate member and a connection member are temporarily fixed.

FIG. 6 is a plan view of the same.

FIG. 7 is a rear view of the pressing plate member.

FIG. 8 is an explanatory view of a method of attaching and detaching, and is a side sectional view showing a state in which a pressing plate member and a connecting member are abutted and connected.

FIG. 9 is an explanatory view of a mounting and removing method, and is a side cross-sectional view showing a state where a pressing ring of a pressing plate member and a buried pipe are in contact with each other.

FIG. 10 is a top view showing a second embodiment of the piping device of the present invention.

FIG. 11 is a top view showing the third embodiment.

FIG. 12 is a side view showing a configuration of a conventional piping device.

FIG. 13 is a side view of the pipe connection part.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 buried pipe 2 leading pipe 3 cutter head 4 casing 5 starting shaft 6, 15, 40 piping 7 connecting member 10 propulsion device 11 drive device 12 push plate member 13 propulsion cylinder 14 control unit 20 through-hole 21, 30 guide portion 22 positioning plate 23, 61 Bolt 30 Guide part 31 Fall prevention guide 32 Bar 33 Groove (Temporary fixing member engaging part) 34 Discharge hole 35 Bolt hole 36 Hole 41 Temporary fixing pin (temporary fixing member) 50 Guide part 51 Dowel pin hole 52 Stud bolt 53 Nut 55 Insert key (temporary fixing member) 60 Connection guide 62 Press ring 24 Pin hole 37 Dowel pin

Claims (3)

(57) [Claims] 1. A front pipe having a cutter head at a front end and a screw conveyor provided behind the cutter head, a buried pipe connected sequentially behind the front pipe, and a buried pipe behind the front pipe and in the buried pipe. A screw conveyor connected in sequence, a propulsion device installed in the starting shaft for propelling the buried pipe into the ground, and a propulsion cylinder forward for transmitting the pressing force of the propulsion cylinder of the propulsion device to the buried pipe. a push plate member provided, in the small diameter pipe propulsion device comprising a connecting member for connecting the piping from the installed control unit設管rear buried and installed piping along the casing outer peripheral surface of the screw conveyor, the connecting member is small-bore pipe propulsion unit, characterized in that provided detachably on the push plate member. 2. The small-diameter pipe propulsion device according to claim 1, wherein the connecting member is detachably attached to the pressing plate member via a temporary fixing member. 3. The small-diameter pipe propulsion device according to claim 1, wherein the connection member is slidably inserted into a casing insertion through-hole provided in the push plate member. Small diameter pipe propulsion machine.