JPH07127384A - Small-sized pipe jacking and layout device - Google Patents

Abstract

PURPOSE:To make it possible to easily take out and collect a casing and an auger screw or a rotary support shaft while preventing the in-flow of water or earth and sand from a, launching shaft side even when excavation is obstructed or held back. CONSTITUTION:In a small-sized pipe jacking layout device 10, which adds a pipeline 20 one after another while excavating a subsoil 12 by rotating an auger screw 19 with an excavating jacking machine 11 installed in a launching shaft, a projection unit 25 is formed on a peripheral surface of a cylinder-shaped fitting unit 24 formed on one end of a casing 18. When the cylinder-shaped fitting unit 24 is inserted and fitted into the end of a lead pipe 15, the projected unit 25 is axially jacked into an L-shaped notched part 26 formed on the end of the lead pipe 15 and then engaged therewith in the peripheral direction and connected so that it may be possible to separate by handling only from the launching shaft side 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small diameter pipe propulsion installation device, and more particularly to a casing and a front conduit, a tip auger and an auger screw, or a rotary support shaft and a correction blade mounting shaft portion in the small diameter pipe propulsion installation device. The present invention relates to a connecting means capable of disconnecting each by operating from the base end side.

[0002]

2. Description of the Related Art Conventionally, when a cable for electric power or communication is buried in the ground, a pipe is laid in the ground and the cable is passed through the pipe. This pipe is generally a small-diameter pipe that cannot be entered by a person.

As a concrete construction method, an underground portion (starting pit) is formed in the ground for accommodating the excavation propulsion device, and the excavation propulsion device is slidably installed in the ground. And, for example, when propelling the laid pipe while excavating the ground,
A tip conduit having a tip auger with a crusher bit attached at the tip is first attached to an excavator and the tip auger is rotated to advance the tip conduit while excavating.

Then, the front conduit and the tip auger are separated from the excavation propulsion unit to retract the excavation propulsion unit, and a laid pipe, that is, a buried pipe such as a fume pipe or a steel pipe is fitted around the rear end portion of the front pipe. At the same time, a casing is added to the front conduit, and an auger screw is connected to the tip auger to advance the excavator again. By repeating such operations, the laying pipe, the casing and the auger screw are sequentially added to excavate and propel.

On the other hand, a reaching shaft is formed in the ground at a predetermined place apart from the starting shaft for recovering the leading conduit and the like. As a result of the excavation propulsion as described above, the entire leading conduit finally exits the reaching shaft. The leading conduit and the tip auger that have come out to the reaching shaft are removed from the casing and the auger screw, respectively, and are raised to the ground and collected. Then, the casing and the auger screw in the laying pipe are pulled out to the starting shaft side by repeating the retreat of the excavation propulsion device, and are sequentially collected on the ground.

[0006]

By the way, in recent years, in anticipation of the extension of the cable in the future, it has been attempted to advance the excavation beyond the required distance for the time being. However,
In such a case, the tip of the excavation will stop underground (stop). Therefore, the leading conduit and the tip auger cannot be removed, and therefore the casing and the auger screw connected to them cannot be taken out from the laying pipe.

As described above, in the conventional small-diameter pipe propulsion installation device, the casing and auger screw in the installation pipe cannot be recovered unless the reaching shaft is formed and the leading conduit and the tip auger are removed therefrom. Even in such a case, the formation of the reaching shaft was necessary.

However, in this case, the time, labor, and cost required for construction are the same as in the case of installing a normal laying pipe, and the significance of temporarily extending and installing the laying pipe for the future is lost. There was a problem. Therefore, for the work to install the laying pipe in advance for such a future, the casing and the auger screw can be installed from inside the laying pipe without forming the reaching shaft and preventing the inflow of water and earth and sand into the laying pipe. It has been desired to develop a small-diameter pipe laying device that can be taken out and collected to reduce the time, labor, cost, etc. required for this construction.

The object of the present invention is to solve the above-mentioned conventional problems. Even when installing a laying pipe by excavation of a push stop or by press fitting, a casing and an auger screw in the laying pipe, or a rotary support. (EN) It is intended to provide a small-diameter pipe propulsion installation device in which a shaft can be taken out and collected while preventing inflow of earth and sand.

[0010]

The present invention is a small-diameter pipe propulsion installation device, which is configured as follows in order to solve the above-mentioned technical problems. That is, the present invention relates to the first conduit 1 detachably attached to the tip of the casing 18.
5 and a tip auger 17 disposed inside thereof and having a crusher bit 16 at the tip, and an auger screw 19 detachably connected to the tip auger 17, and the excavator 11 installed in the starting shaft 13 In the small-diameter pipe propulsion laying device laid in the ground 12 by rotating the auger screw 19 to excavate the ground 12 and sequentially adding and propelling the laying pipes 20 to the ground pipe 12, Connection part 2
3 is formed on at least one end portion of the leading conduit 15 or the casing 18, and is formed on the cylindrical fitting portion 24 to be inserted into the other end portion and on the peripheral surface of the cylindrical fitting portion 24. The protrusion 25 and the notch 26 formed in the other end and formed in an L-shape for engaging the protrusion 25 in the axial direction after engaging the protrusion 25 in the axial direction. The casing 18 is installed after the installation pipe 20 is installed by a predetermined distance.
Is reversely rotated from the side of the excavator 11 and
It is characterized in that it is separated from 5 and collected.

Further, in the small diameter pipe propulsion installation device of the present invention, the tip auger 17 and the auger screw 1 are used.
A tubular fitting portion 29, which is formed at at least one end portion of the tip auger or auger screw and is inserted into the other end portion, and a tubular fitting portion 29.
A protrusion 30 formed on the peripheral surface of the second end, and a concave groove portion 31 formed on the inner peripheral surface of the other end and formed in an L shape so as to engage in the rear circumferential direction after the protrusion enters the axial direction. The auger screw 19 is reversely rotated from the side of the excavator 11 and separated from the tip auger 17 and recovered after the plurality of laying pipes 20 have been laid for a predetermined distance.

Further, in the present invention, the correction blade mounting shaft portion 34 is detachably attached to the tip of the rotary support shaft 33 that is inserted through the laying pipe 20, and the rotation is performed by the excavation propulsion device 11 installed in the starting shaft 13. A small-diameter pipe propulsion laying device that lays in the ground 12 by sequentially adding the laying pipes 20 while rotating the support shaft 33 and propelling the laying pipes 20 by press-fitting. A connecting portion that is detachably connected is formed on at least one end of the rotation support shaft 33 or the correction blade mounting shaft portion 34,
And a tubular fitting portion to be inserted into the other end portion, a projection portion formed on the peripheral surface of the tubular fitting portion, and an inner circumferential surface of the other end portion, the projection portion in the axial direction. And a recessed groove formed in an L shape so as to engage in the rearward circumferential direction after advancing, and the rotary support shaft is reversely rotated from the side of the excavation propulsion machine after propelling a large number of the laying pipes for a predetermined distance. It is characterized by being separated from the tip auger and collected.

[0013]

According to the small-diameter pipe propelling installation device of the present invention, for example, when the installation pipe 20 is propelled while excavating the ground 12, the tip auger 17 having the crusher bit 16 attached to the tip thereof is connected to the tip conduit 15 of the tip conduit 15. A casing 18 is disposed inside and a casing 18 is detachably connected to the leading conduit 15. Then, the laying pipe 20 is fitted so as to be located outside the casing 18, and then the casing 20
The auger screw 19 is inserted in the tip auger 1
7 is detachably connected.

The connection between the front conduit 15 and the casing 18 is
The tubular fitting portion 24 formed at the end of the casing 18 is inserted into the leading conduit 15. At that time, the projection 25 formed on the peripheral surface of the tubular fitting portion 24 first enters the L-shaped notch 26 formed at the end of the leading conduit 15 in the axial direction first, and then when excavating and propelling. It is rotated in the rotational direction and engaged in the circumferential direction, so that the two are connected.

Next, the auger screw 19 and the casing 18 are rotated, and the ground 12 is crushed by the crusher bit 16.
While excavating, the shear is discharged to the starting shaft 13 by the auger screw 19, and at the same time, the laying pipe 20 is propelled at a predetermined pressure and a new laying pipe 20 is connected and propelled into the ground. When the leading conduit 15 reaches a predetermined distance, the auger screw 19 is first rotated in the direction opposite to that at the time of excavation,
As a result, the connecting portion 28 between the auger screw 19 and the tip auger 15 is disengaged from the engagement in the circumferential direction, and in this state, the auger screw 19 is pulled out in the proximal direction.

Thereafter, the casing 18 is similarly rotated in the opposite direction, and the circumferential engagement of the projection 25 on the circumferential surface of the tubular fitting portion 24 with the notch 26 of the leading conduit 15 is released,
The casing 18 is pulled out in the proximal direction. In this way, the auger screw 19 and the casing 18 are separated from the tip auger 17 and the leading conduit 15 and recovered by the operation from the starting shaft 13.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The small diameter pipe propulsion laying apparatus of the present invention will be described in more detail with reference to the embodiments shown in the drawings. 1 to 4 show a small diameter pipe propulsion laying pipe apparatus 10 according to an embodiment of the present invention.

Small-diameter pipe propulsion installation device 1 according to this embodiment
Reference numeral 0 includes a conventionally known excavation propulsion machine 11. This excavation propulsion machine 11 is an underground part formed on the ground 12, that is, a starting shaft 13
It is installed on the rail 14 laid on the bottom of the rail so that it can slide back and forth. Then, with the excavation propulsion unit 11 retracted, at one end of the rotary shaft of the excavation propulsion unit 11, as shown in FIG. 2, the tip conduit auger 17 and the tip auger 17 having the crusher bit 16 attached to the tip thereof and attached to the tip thereof are attached. And are attached,
While excavating and propelling the excavator 11, the ground 12 is excavated laterally and propelled.

In this way, after the tip conduit 15 having the tip auger 17 arranged therein is first introduced into the ground 12, the excavation propulsion machine 11 is retracted and the tip casing 15 is provided with the first casing 18. An auger screw 19 is detachably connected to the tip auger 17, and a laying pipe 20 is attached to the outer periphery of the casing 18 so as to house the casing 18. And the like.

Then, the excavator 11 is moved forward again,
The laying pipe 20 is propelled while excavating the ground 12.
After that, by repeating the above-described operation, the auger screw 19, the casing 18, and the laying pipe 20 are added each time.

Next, the detachable connecting portion 23 between the leading conduit 15 and the casing 18 will be described in detail with reference to FIGS. 2 to 4. As shown in FIGS. 3 and 4, the connecting portion 23 is formed at the end of the casing 18 on the connection side, and the tubular fitting portion 24 is inserted into the leading conduit 15, and the tubular fitting portion 24. Rectangular protrusions 25 formed at two locations on the peripheral surface of the
And two L-shaped notches 26 formed at the connection-side end of the front conduit 15 and engaged in the rear circumferential direction with the above-mentioned protrusion 25 entering in the axial direction. There is.

At this time, the tubular fitting portion 24 of the casing 18
The direction in which the protrusion 25 formed on the circumferential surface first enters the notch 26 in the axial direction and engages in the rear circumferential direction is the direction in which the casing 18 rotates together with the tip auger 15 during excavation propulsion, that is, during normal operation. It is said to be the direction of rotation. It should be noted that the tip auger 15 and the casing 18 are formed by the connecting portion 23.
When connecting with the reinforcing ring 2 around the end portion of the tip auger 15 in which the notch portion 26 is formed as shown in FIG.
7 is attached.

Further, the structure of the detachable connecting portion 28 between the tip auger 17 and the auger screw 19 is basically the same as the connecting portion 23 between the leading conduit 15 and the casing 18 described above.
The structure is the same as that of the above, and a cylindrical fitting portion 29 is formed at the end of the auger screw 19, and rectangular protrusions 30 are formed at two locations on the peripheral surface thereof.

On the other hand, at the end portion of the tip auger 17, an axial concave portion for receiving the cylindrical fitting portion 29 of the auger screw 19 is formed on the end surface, and the inner peripheral surface of the concave portion has the end portion of the above-mentioned front conduit 15. Groove having the same shape as the notch portion 26, that is, L
A V-shaped groove portion 31 is formed. As a result, the connection between the tip auger 17 and the auger screw 19 is detachably connected in exactly the same manner as in the case of the connection between the leading conduit 15 and the casing 18 described above.

Next, the main operation of the small diameter pipe propulsion laying apparatus 10 according to the above-described embodiment will be described. As described above, the casing 18 and the auger screw 19 are sequentially added and the hollow laying pipe 20 is also sequentially connected while advancing and retracting the excavation propulsion device 11 installed in the starting shaft 13 (the connecting portion is shown in FIG. 1). Sleeve 32
Are engaged) and then excavated and propelled for a predetermined distance and stopped.

After that, the casing 18 which is successively added is added.
In addition, each of the auger screws 19 is rotated in the opposite direction by the excavation propulsion machine 11 from the base end, that is, the side of the starting shaft 13 (when the rotation direction during excavation propulsion is the forward rotation direction, the rotation is the opposite direction). Thereby, regarding the connection between the front conduit 15 and the casing 18, the notch 2 of the front conduit 15 due to the projection 25 on the peripheral surface of the tubular fitting portion 24 of the casing 18 is formed.
The circumferential engagement with 6 is released, and the casing 18 is pulled out in the proximal direction.

At this time, the water and earth and sand around the leading conduit 15 are prevented from flowing into the laying pipe by the seal 21 provided on the inner peripheral portion of the leading end of the laying pipe 20 and the outer peripheral surface of the leading conduit 15. Even if they are pulled out, they never flow into the laying pipe 20.

Further, the connection release of the tip auger 17 and the auger screw 19 is basically the same as the case where the casing 18 and the leading conduit 15 are disconnected, but if the auger screw 19 is disconnected as it is, the tip auger is disconnected. 17
Since earth and sand and water flow in from between the opening of the front conduit 15 and the opening of the front conduit 15, the auger screw 19 is pulled to the base end side before this separation, and as shown in FIG. The seal portion 36 around the large diameter portion is brought into contact with the front end opening surface of the leading conduit 15 to prevent the inflow of earth and sand or water in advance. That is, the tip auger 17 closes the opening of the front conduit 15.

As described above, the casing 18 and the auger screw 19 are separated from the leading conduit 15 and the tip auger 17 and recovered by the operation from the starting shaft. In this case, the tip conduit 15 and the tip auger 17 separated from the casing 18 and the auger screw 19 are used.
Will be left in the ground as it is.

FIG. 5 shows a propulsion tip of a small-diameter pipe propulsion installation device according to another embodiment of the present invention. The small-diameter pipe propulsion laying apparatus of this embodiment is an example of propulsion laying the laying pipe 20 especially in soft ground.
A correction blade mounting shaft portion 34 is detachably attached to the tip of the rotary support shaft 33 that passes through the inside of the shaft 0. The correction blade mounting shaft portion 34 literally has a correction blade 35 attached to the tip thereof. The correction blade mounting shaft portion 34 has a rear end portion to which a first rotation support shaft 33 is detachably connected, and thereafter, together with the laying pipe 20. It will be added in sequence.

In the small diameter pipe propulsion installation device of this embodiment,
The rotary support shaft 33 is pressed into the ground while being rotated by the excavation propulsion machine 11 installed in the starting shaft 13, and at the same time, the laying pipe 20 is also press-fitted and propelled, thereby laying in the ground 12. In such a small diameter pipe propulsion laying apparatus for soft ground, the connecting portion between the rotary support shaft 33 and the correction blade mounting shaft portion 34 has the leading conduit 15 in the above-described embodiment.
And the connecting portion 23 between the casing 18 and the casing 18 are configured in exactly the same manner.

Therefore, even in the case of this small diameter pipe propulsion installation device, after the installation pipe 20 is installed for a predetermined distance, the rotary support shaft 3
3 can be reversely rotated by the propulsion device main body 11 to be separated from the correction blade mounting shaft portion 34, and the rotary support shaft 33 can be easily recovered from the starting shaft 13 side after the installation of the laying pipe.

[0033]

As described above, according to the small-diameter pipe propulsion laying apparatus of the present invention, the casing, the auger screw, or the tip of the auger screw or the correction blade mounting shaft of the casing, the auger screw, or the rotary support shaft is installed from the starting shaft side. Since the connection to the part can be easily released, even when excavating at a stop, these casings, auger screws, or rotary support shafts can be recovered without difficulty and the seal structure does not allow the inflow of water or earth and sand. it can. As a result, according to the small-diameter pipe propulsion installation device of the present invention, it is possible to reduce the time, labor, cost, etc. required for the work for installing the installation pipe in advance for the future.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view schematically showing an overall configuration of a small diameter pipe propulsion installation device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an excavation propulsion tip portion of the small diameter pipe propulsion installation device shown in FIG.

FIG. 3 is a cross-sectional view showing a tip conduit and a tip auger in the excavation propulsion tip shown in FIG.

FIG. 4 is a perspective view showing a configuration of a connecting portion between a leading conduit and a casing.

FIG. 5 is a cross-sectional view showing an excavation propulsion tip portion in a small diameter pipe propulsion laying apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 10 Small Diameter Pipe Propulsion Laying Device 11 Excavation Propulsion Machine 12 Ground 13 Starting Vertical Shaft 14 Rail 15 Lead Conduit 16 Crusher Bit 17 Tip Auger 18 Casing 19 Auger Screw 20 Laying Pipe 21 Seal 22 Bearing 23 Coupling 24 Cylindrical Fitting 25 Protrusion Part 26 Notch part 27 Reinforcement ring 28 Connecting part 29 Cylindrical fitting part 30 Protrusion part 31 Notch part 32 Sleeve 33 Rotation support shaft 34 Correcting blade mounting shaft part 35 Correcting blade 36 Seal

Claims (3)

[Claims] 1. A tip conduit detachably attached to a casing tip, a tip auger disposed inside thereof and provided with a crusher bit at the tip, and an auger screw detachably connected to the tip auger,
In a small diameter pipe propulsion laying device laid in the ground by sequentially adding and propelling the laying pipe while excavating the ground by rotating the auger screw by the excavation propulsion device installed in the starting shaft, A connecting part with the casing is formed on at least one end of the leading conduit or the casing, and is formed on a peripheral surface of the cylindrical fitting part to be inserted into the other end. A plurality of laying pipes, each of which is provided with a plurality of laying pipes and an L-shaped notch formed on the other end of the ridge to engage in the rearward circumferential direction when the boss enters in the axial direction. The small diameter pipe propulsion laying device, wherein the casing is reversely rotated from the excavator side after the propulsion is laid for a predetermined distance, and the casing is separated from the tip conduit and collected. 2. A tip conduit comprising a tip conduit detachably attached to a casing tip, a tip auger disposed inside thereof and having a crusher bit at the tip, and an auger screw detachably connected to the tip auger.
In a small diameter pipe propulsion laying device laid in the ground by sequentially adding and propelling the laying pipe while excavating the ground by rotating the auger screw by the excavation propulsion device installed in the starting shaft, and the tip auger The connection part with the auger screw is
A tubular fitting portion formed on at least one end portion of the tip auger or auger screw and inserted into the other end portion, and a projection portion formed on the peripheral surface of the tubular fitting portion,
A large number of the laying pipes are propelled by a predetermined distance, which is formed on the inner peripheral surface of the other end and is formed of an L-shaped concave groove portion for engaging the projection portion in the axial direction and engaging in the rear circumferential direction. After the installation, the auger screw is reversely rotated from the excavation propulsion machine side to be separated from the tip auger and recovered, and the small diameter pipe propulsion installation device is characterized. 3. A correction blade mounting shaft portion is detachably attached to the tip of a rotary support shaft that is inserted through the laying pipe, and the laying pipe is sequentially rotated while rotating the rotary support shaft by an excavation propulsion machine installed in the starting shaft. A small-diameter pipe propulsion laying device that is laid in the ground by replenishing and press-fitting,
A connecting portion that detachably connects the rotation support shaft and the correction blade mounting shaft portion is formed at at least one end of the rotation support shaft or the correction blade mounting shaft portion, and is inserted into the other end. A tubular fitting portion, a protrusion formed on the circumferential surface of the tubular fitting portion, and an inner circumferential surface of the other end portion,
When the protrusion is axially inserted, it is L to engage in the rear circumferential direction.
It is composed of a concave groove formed in a V shape, and after the installation of a large number of the laying pipes by a predetermined distance, the rotary support shaft is reversely rotated from the excavation propulsion machine side and separated from the tip auger for recovery. A small-diameter pipe propulsion installation device.