JP6293496B2 - Simple rotary shaft device for main pusher in small-diameter propulsion method and propulsion method using the same - Google Patents

Description

The present invention relates to a separate simple rotating shaft device that rotates a propulsion pipe or a casing when a direction is corrected in a main pushing device in a small-diameter propulsion method, and a propulsion method using the same.

The main pusher used in the small-diameter propulsion method can be broadly divided into two types: (1) the push-in function only, and (2) the push-in function plus the rotary shaft for excavation / soil removal and direction correction. being classified.

When the function of the main pushing device (1) is “push-in function only”, there are many cases where a semi-shield machine having excavation / soil removal and direction correction functions is provided at the tunnel tip. Since the semi-shield machine is driven independently from the main pusher, it can be used for curved construction and 300m long-distance construction. The construction diameter is generally 250 mm or more because various functions are provided in the semi-shield machine.

When the function of the main pushing device in (2) above is “equipped with push-in function + rotating shaft”, since the various functions are concentrated in the main pushing part, the semi-shield machine is not adopted, and the tunnel tip Employs a simple head that is driven by a main pusher. The construction diameter is generally applied to construction diameters of less than 800 mm, but it is limited to straight construction because the head at the tunnel tip is driven by the main pushing device, and a drive loss to the tunnel tip occurs, so about 100 m It is applied to up to construction.

The principle of excavation / soil removal and direction correction in the small-diameter propulsion method utilizing the function of the above-mentioned pushing device “with push-in function + rotating shaft” is shown below based on FIG.

The apparatus for excavation and earthing is composed of an auger shaft 41 connected to the first rotating shaft 40 of the main pushing device and a bit 42 for excavating a natural ground attached to the tip thereof. Further, on the outer periphery of the auger shaft 41, a casing tube 43 and a propelling tube 45 connected to the tip head 44 are respectively crowned on the outer periphery of the casing tube 43, and these are the main push jacks 46 of the push device. It is connected to the.

When the first rotating shaft 40 of the main pushing device rotates, the auger shaft 41 and the bit 42 rotate at the same time, and the bit 42 excavates a natural ground and the main pushing jack 46 extends, whereby the tip head 44 and the casing tube 43 are rotated. The propulsion tube 45, the bit 42, and the auger shaft 41 propel the natural ground. At the same time, excavated earth and sand are taken in between the inner circumference of the casing tube 43 and the outer circumference of the auger shaft 41, and the excavated earth and sand are carried into the start shaft 47 by the rotation of the auger shaft 41.

The device for correcting the direction is connected to the casing tube 43 connected to the second rotating shaft 48 of the main pushing device and the distal end head 44 attached with the direction correcting body 49 eccentric to the excavation shaft. Configured. When the second rotating shaft 48 of the main pushing device rotates, the direction correcting body 49 at the tip rotates through the casing tube 43, and the bulge rides on the ground and corrects in the opposite direction by pushing in by changing the position of this bulging. It is something to be made.

As described above, when direction correction and earth removal are performed in the propulsion method, the main pushing device needs a two-axis rotating device. The thing of this structure is disclosed by description of the prior art of patent document 1 and patent document 2. FIG.

Among the small-diameter propulsion methods, the construction method corresponding to space saving (1.5m or less) requires downsizing of the start shaft where the main pushing device is installed, so there is no need to install a semi-shielded machine. A small pusher with a rotating function is used.

In the compact main pushing device, the rotating shaft is omitted to reduce the size so that only the hydraulic jack functions, or the rotating shaft is limited to one axis of the excavating and discharging function and the direction correcting function is omitted. Compatible with miniaturization. In such a construction method that does not have a direction correcting function, the working distance is short-distance construction due to the problem of construction accuracy.

At present, as a device for adding a rotation shaft for correcting the direction of the main pushing device as a retrofit, a device in which a plurality of hydraulic jacks are combined has been developed.

The principle of the device that adds a plurality of hydraulic jacks to add the rotation shaft of the main pushing device is that two first hydraulic jacks that grip the propulsion pipe from two locations outside and one second that rotates the propulsion pipe. It consists of a hydraulic jack. In order to rotate the propulsion pipe, first, the propulsion pipe is gripped by two first hydraulic jacks. In this state, the second hydraulic jack is extended and rotated together with the first hydraulic jack. When the rotation is finished, the first hydraulic jacks are loosened, the propelling pipes are released, the second hydraulic jacks are contracted, and the initial state is restored. This is repeated to rotate the propulsion pipe by the required amount.

Japanese Utility Model Publication No. 62-159596 Japanese Patent Laid-Open No. 9-310579

However, when a small main pushing device is used in “sand ground” to which the press-fitting method cannot be applied, the single axis of rotation corresponds to excavation and soil removal, so the direction cannot be corrected and the necessary construction accuracy cannot be ensured. Moreover, the apparatus which adds the rotating shaft of the said main pushing apparatus by retrofitting is not large, and cannot be applied to the space-saving construction of a starting shaft.

Accordingly, the present invention provides a rotary shaft device with a simple retrofit, which can reduce the size of the rotary shaft device and can easily increase the rotary shaft of the main push device by one in a small-bore propulsion main push device. It is intended to provide.

According to the first aspect of the present invention, the front end device provided in the start shaft pushes the rear end of the propulsion pipe to which the front end head is connected and propels it while connecting a plurality of propulsion pipes in the soil, and the front end head Has a drill bit in the opening, and a rotary shaft is provided at the rear end of the drill bit. The rotary shaft passes through a plurality of casing pipes connected to the propulsion pipe, and In the small-diameter propulsion device that is rotated by a drive motor provided at the device location, a simple rotation shaft device for a casing tube is provided between the main pushing device and the rear end of the propulsion tube, and the simple rotation shaft device for the casing tube has a central hole The locking portions provided on both sides of the main body frame are locked to the guide bodies on both sides of the main pushing jack of the main pushing device to support the main body frame, and on one side of the main body frame, Rotate against An annular large-diameter gear is provided, a small-diameter gear meshing with the annular large-diameter gear is also rotatably provided, a handle with a ratchet that rotates the small-diameter gear is pivotally supported, and the other side of the main body frame and the propulsion pipe An annular propulsion pipe push ring is interposed between the rear end and the annular large-diameter gear and the casing pipe at the rear end are connected through a central hole of the main body frame, and the rear end connected to the rear end of the excavation bit. The rotary shaft is connected to the main pushing device through the propulsion pipe push ring , the central hole of the main body frame and the annular large diameter gear, and the small diameter gear and the annular large diameter gear are rotated by rotating the handle with the ratchet, The rotary shaft device in the main pusher for small-diameter propulsion is configured such that the casing tube and the tip head rotate by the rotation of the annular large-diameter gear.

According to a second aspect of the present invention, the rotary shaft is an auger shaft, a soil discharge spacer is provided between the casing shaft rotary shaft device and the main pushing device, and the earth and sand excavated by a tip excavating bit is passed through the casing tube to form the soil discharge. The simple rotary shaft device in the main pusher for small-diameter propulsion according to claim 1 is configured to discharge from the earth discharge port of the spacer for use.

According to a third aspect of the present invention, the leading end device provided in the start shaft pushes the rear end of the propulsion pipe to which the tip head is connected and propels it while connecting a plurality of propulsion pipes in the soil, and the tip head Has a drill bit in the opening, and a rotary shaft is provided at the rear end of the drill bit. The rotary shaft passes through a plurality of casing pipes connected to the propulsion pipe, and In a small-diameter propulsion method that is rotated by a drive motor provided at the device location, a simple rotary shaft device for a casing tube is detachably provided between the main pushing device and the rear end of the propulsion tube, and the simple rotary shaft device for the casing tube is The locking portions on both sides of the main body frame having the central hole are locked to the guide bodies on both sides of the main pressing jack of the main pressing device to support the main body frame, and the main body frame is provided on one side of the main body frame. Against A rotatable annular large-diameter gear is provided, a small-diameter gear that meshes with the annular large-diameter gear is also rotatably provided, a handle with a ratchet that rotates the small-diameter gear is supported, and propelled with the other side of the main body frame A rotating shaft connected to the rear end of the excavation bit by interposing a propulsion pipe push ring between the rear end of the pipe, connecting the annular large-diameter gear and the casing pipe of the rear end through a central hole of a main body frame Is connected to the main pushing device through the push ring for the propulsion pipe, the center hole of the main body frame, and the annular large diameter gear, and the small diameter gear and the annular large diameter gear are rotated by rotating the handle with the ratchet of the propulsion pipe. Then, a small-diameter propulsion method was adopted in which the casing tube and the tip head can be rotated by the rotation of the annular large-diameter gear.

According to a fourth aspect of the present invention, the leading end device provided in the start shaft pushes the rear end of the propulsion pipe to which the tip head is connected and propels it while connecting a plurality of propulsion pipes in the soil, and the tip head Has an excavation bit at the opening, and an auger shaft for earth removal is provided at the rear end of the excavation bit, and the auger shaft passes through a casing pipe connected to the propulsion pipe through the casing pipe. The leading end of the casing tube is connected to the leading end head, and the leading end head and the casing tube are rotated by a drive motor provided at the position of the leading pressing device in the small diameter propulsion device. An auger shaft simple rotation shaft device is provided between the device and the rear end of the propulsion pipe, and the auger shaft simple rotation shaft device is provided with a locking mechanism provided on both sides of a main body frame having a central hole. Dress The main pusher jack is engaged with the guide bodies on both sides to support the main body frame, and on one side of the main body frame, an annular large-diameter gear that is rotatable with respect to the main body frame is provided. A small-diameter gear to be engaged is also provided so as to be freely rotatable, a handle with a ratchet that rotates the small-diameter gear is pivotally supported, the annular large-diameter gear and the auger shaft at the rear end are connected through a central hole of the main body frame, A simple rotating shaft device in a small-diameter propulsion main pushing device in which a small-diameter gear and an annular large-diameter gear are rotated by rotating a handle with a ratchet, and the auger shaft is rotated by the rotation of the annular large-diameter gear. It was.

According to a fifth aspect of the present invention, the front end device provided in the start shaft pushes the rear end of the propulsion pipe to which the front end head is connected and propels it while connecting a plurality of propulsion pipes in the soil, and the front end head Has an excavation bit at the opening, and an auger shaft for earth removal is provided at the rear end of the excavation bit, and the auger shaft passes through a casing pipe connected to the propulsion pipe through the casing pipe. In the small-diameter propulsion method, the leading end of the casing tube is connected to the leading end head, and the leading end head and the casing tube are rotated by a driving motor provided in the main pushing unit. An auger shaft simple rotation shaft device is provided between the device and the rear end of the propulsion pipe, and the auger shaft simple rotation shaft device is provided with a locking mechanism provided on both sides of a main body frame having a central hole. Dress The main pusher jack is engaged with the guide bodies on both sides to support the main body frame, and on one side of the main body frame, an annular large-diameter gear that is rotatable with respect to the main body frame is provided. A small-diameter gear to be engaged is also provided so as to be freely rotatable, a handle with a ratchet that rotates the small-diameter gear is pivotally supported, the annular large-diameter gear and the auger shaft at the rear end are connected through a central hole of the main body frame, By rotating the handle with a ratchet, the small-diameter gear and the annular large-diameter gear were rotated, and the auger shaft was made rotatable by the rotation of the annular large-diameter gear.

The invention of claim 6 is a small-diameter propulsion device that pushes the rear end of the propulsion pipe connected to the tip head by a main pushing device provided in the shaft and propels it while connecting a plurality of propulsion pipes in the soil. A simple rotating shaft device for a propelling tube is provided between the main pushing device and the rear end of the propelling tube, and the simple rotating shaft device for the propelling tube has locking portions provided on both sides of a main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main push jack of the pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the radial gear is also rotatably provided, supports a handle with a ratchet that rotates the small-diameter gear, and connects the annular large-diameter gear and the rear end of the propulsion pipe through the central hole of the main body frame. The ratchet Simple rotation in a small small-diameter propulsion main pushing device, in which a small-diameter gear and an annular large-diameter gear are rotated by rotating the attached handle, and the propulsion pipe and the tip head are rotated by the rotation of the annular large-diameter gear. A shaft device was used.

The invention of claim 7 is a small-diameter propulsion method for propelling while connecting a plurality of propulsion pipes in the soil by pressing the rear end of the propulsion pipe connected to the tip head by a main pushing device provided in the shaft. A simple rotation shaft device for propulsion pipe is detachably provided between the main pushing device and the rear end of the propulsion tube, and the simple rotation shaft device for propulsion tube is provided with locking portions on both sides of a main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main push jack of the main push device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the large-diameter gear is also rotatably provided, pivotally supports a handle with a ratchet that rotates the small-diameter gear, and connects the annular large-diameter gear and the rear end of the propulsion pipe through the central hole of the main body frame. And the laci By rotating the Tsu bets with handles, to rotate the small diameter gear and the annular large-diameter gear, the rotation of the annular large-diameter gear and a rotatable propulsion tube and the tip head, and a small small-diameter jacking method

According to the first and third aspects of the invention, when the casing tube is rotated around the central axis for the purpose of correcting the direction, the operator raises and lowers the handle with the ratchet of the simple rotary shaft device for the casing on the main pushing device side. When the reciprocating rotation is performed, the annular large-diameter gear and the casing pipe connected thereto rotate, and the tip head rotates. Accordingly, when the tip head has a direction correcting body, the direction of the direction correcting body can be changed by rotation of the tip head, and the direction can be corrected by propulsion with a push jack.

The simple rotating shaft device for a casing tube having such a function can be manually operated by an operator by adopting the simple and small configuration as described above, and can be made compact compared with a conventional drive motor. It can also be applied to narrow start shafts. Further, this simple rotating shaft device for casing pipe can be easily attached between the propulsion pipe at the rear end and the main pushing jack, and can be removed when not required, thus saving space.

Further, in the first and third aspects of the invention, the tip of the tip head is opened, and a drill bit is provided at the location, and the drill bit is rotated by a rotating shaft connected to the rear end. Yes. Accordingly, the tip head propels the soil with the pressing force of the main push jack and pushes while cutting the ground with the excavation bit. And the earth and sand shaved by the excavation bit is sent to the start shaft side through the space between the casing pipe and the rotary shaft in accordance with the propulsion into the soil, and is discharged to the start shaft.

According to the second aspect of the present invention, the earth removal spacer having the auger shaft as the rotation shaft and having the discharge port for discharging the earth excavated by the excavation bit is provided between the simple rotation shaft device for the casing pipe and the main pushing device. Since it is provided in between, the above-mentioned soil removal is positively conveyed to the start shaft by the auger shaft, and the soil removal from the discharge port of the soil removal spacer can be performed smoothly.

According to the inventions of claims 4 and 5, the propulsion and the direction correction are rotated by a drive motor provided in the main pushing device, and when the earth needs to be discharged, the operator can easily rotate the auger shaft. If the handle with a ratchet of the device is reciprocated up and down, the auger shaft rotates and the earth and sand excavated by the excavation bit can be conveyed into the start shaft, and the soil can be conveyed according to the soil during Tonel excavation. The efficiency of the propulsion method can be improved.

In addition, according to the inventions of claims 6 and 7, in the small-sized small-diameter propulsion device that propels the soil with the pressing force of the main push jack, the rotation shaft is provided by attaching the simple rotation shaft device for the propulsion pipe, The propulsion tube can be easily rotated. Therefore, if the tip head is provided with a direction correcting body, the propulsion direction can be corrected. Moreover, the propulsion pipe simple rotating shaft device has a simple configuration, can be made compact, and is very easy to install.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration side view of a small-diameter propulsion device in a state where a simple rotating shaft device for a casing tube according to Embodiment 1 of the present invention is attached between a rear end of a propulsion tube and a main push jack. It is a longitudinal cross-sectional view of the simple rotating shaft device for casing pipes of Embodiment 1 of this invention. It is a rear view of the simple rotating shaft device for casing pipes of Embodiment 1 of this invention. It is a front view of the simple rotating shaft device for casing pipes of Embodiment 1 of this invention. It is a schematic block diagram which shows the state which pushed the rear end propulsion pipe | tube, the casing pipe | tube, and the auger shaft in the earth in the small diameter propulsion method using the simple rotating shaft apparatus for casing pipe | tubes of Embodiment 1 of this invention. In the small-diameter propulsion method using the simple rotating shaft device for casing pipe according to the first embodiment of the present invention, the newly connected propulsion pipe, casing tube and auger shaft and the simple rotating shaft device for casing pipe are connected to the small-diameter propelling device. It is a schematic decomposition | disassembly block diagram which shows the state to do. It is a longitudinal cross-sectional view of the modification of the simple rotating shaft apparatus for casing tubes of Embodiment 1 of this invention. It is a partially expanded explanatory sectional view in the modification of the simple rotating shaft device for casing pipe of Embodiment 1 of this invention. It is a longitudinal cross-sectional view which shows the other modification of the simple rotating shaft apparatus for casing pipe | tubes of Embodiment 1 of this invention. It is a front view which shows the other modification of the simple rotating shaft apparatus for casing pipe | tubes of Embodiment 1 of this invention. It is a schematic structure side view of the small caliber propulsion device in a state in which the auger shaft simple rotary shaft device according to the second embodiment of the present invention is attached between the rear end of the propulsion tube and the main push jack. It is a longitudinal cross-sectional view of the simple rotating shaft apparatus for auger shafts of Embodiment 2 of this invention. It is a schematic structure side view of the small diameter propulsion device in a state where the simple rotary shaft device for a propulsion tube according to Embodiment 3 of the present invention is attached between the rear end of the propulsion tube and a main push jack. It is a longitudinal cross-sectional view of the simple rotating shaft apparatus for propulsion pipes of Embodiment 3 of this invention. It is a schematic structure side view of the rotating shaft apparatus for casing pipes in the conventional small diameter propulsion apparatus.

(Embodiment 1)
Hereinafter, a small-diameter propulsion device using a simple rotating shaft device A for casing pipe according to Embodiment 1 of the present invention will be described with reference to FIGS.

As shown in FIG. 1, a direction correcting body 2 is provided on the outer periphery of one side surface of the substantially cylindrical tip head 1, and a plurality of propulsion pipes 3 are connected to each other on the rear side (however, FIG. 1). In FIG. 3, a plurality of connected propulsion pipes 3 are drawn together.) A plurality of casing pipes 4 are connected to each other on the inner periphery of these propulsion pipes 3 (however, in FIG. 1, the plurality of connected casing pipes 4 are drawn integrally). An auger shaft 5 is provided in the casing tubes 4, and a drilling bit 6 protruding from the front opening of the tip head 1 is provided at the tip of the auger shaft 5.

The earth and sand excavated by the excavating bit 6 enters between the casing tube 4 and the auger shaft 5 and is sent backward by the rotation of the auger shaft 5. The tip head 1, the propulsion pipe 3, the casing pipe 4 and the auger shaft 5 are propelled into the soil by a main pushing jack 8 provided in the start shaft 7. The auger shaft 5 is driven at the front end of the main pushing jack 8. The auger hydraulic motor 10 provided in the transmission housing 9 is rotated.

A simple rotating shaft device A for casing pipe is provided between the front end of the drive transmission housing 9 and the rear end of the propulsion pipe 3 and the rear end of the casing pipe 4. As shown in FIGS. 2 to 4, the casing tube simple rotating shaft device A includes hook-shaped locking portions 13 and 13 provided on both sides of a main body frame 12 having a central hole 11. The main body frame 12 is supported by being engaged with guide bodies (not shown) on both sides.

The guide body is slidably crowned by guide shafts provided on both sides of the pressing cylinder of the main pushing jack 8 and moves integrally with the pressing body pressed by the pressing cylinder. It is a guide. In Embodiment 1, the locking portion 13 has a hook shape, but holes provided on both sides of the main body frame 12 may be used. In this case, the front guide body is inserted into the holes on both sides to support the main body frame 12.

In addition, a core tube 14 is provided in the central hole 11 of the main body frame 12 so as to be rotatable with respect to the main body frame 12, and an annular ring is rotatable on one side of the main body frame 12 with respect to the main body frame 12. A large-diameter gear 15 is provided. The annular large-diameter gear 15 is fixed to the rear end surface of the core tube 14 by a bolt 16. The central hole of the annular large-diameter gear 15 and the hole of the core tube 14 have the same central axis and the same inner diameter, A communication hole 17 is formed.

A small-diameter gear 18 that meshes with the annular large-diameter gear 15 is also rotatably provided on one side of the main body frame 12, and a handle 19 with a ratchet that rotates the small-diameter gear 18 coaxially with the small-diameter gear 18 is provided as a shaft. It is supported. In addition, on the other side of the main body frame 12 on the opposite side to the annular large-diameter gear 15 and the small-diameter gear 18, a plurality of the annular body on the front surface of the annular body is spaced apart on the central axis of the annular body. A propulsion tube pusher 20 from which the small protrusion 20a protrudes is provided.

Further, a plurality of holes 21 are provided at equal intervals along the outer peripheral edge of the communication hole 17 of the annular large-diameter gear 15, and a stepped hole 22 having a small diameter at the tip is formed following each hole 21. Plural screw holes 23 are provided on the rear end face of the casing 4. The corresponding holes 21, the stepped holes 22 and the screw holes 23 are configured such that the central axes are located on the same line.

In order to connect the casing tube rotary shaft device A to the small-diameter propulsion device, the casing tube is inserted between the front end of the drive transmission housing 9 and the rear end of the propulsion tube 3 and the rear end of the casing tube 4. 4 is aligned with the front end surface of the core tube 14 of the casing tube rotating device A, and a plurality of bolts 24 are inserted from the respective holes 21 of the annular large-diameter gear 15 through the stepped holes 22 of the core tube 14. The tip is screwed into each screw hole 23 on the rear end surface of the casing tube 4 and tightened. At that time, the heads of the bolts 24 are locked to the step portions of the stepped holes 22.

Thereby, the casing pipe | tube 4 and the cyclic | annular large diameter gearwheel 15 are connected integrally. At the same time, the plurality of small projecting pieces 20 a of the propulsion pipe push ring 20 of the casing pipe rotating device A are locked to the rear end of the propulsion pipe 3. Further, the auger shaft 5 is passed through the hole of the propelling tube push ring 20 and the communication hole 17 of the casing tube rotating shaft device A, the end of the auger shaft 5 is connected to the drive transmission housing 9, and the casing tube rotating shaft is connected. A soil removal spacer 25 is interposed between the device A and the drive transmission housing 9.

The soil removal spacer 25 has an inverted U-shaped section having a soil discharge port 26 in the lower portion, is supported by the drive transmission housing 9, and is used for the annular large-diameter gear 15 and the small-diameter gear 18 of the casing tube rotating device A. The structure does not hinder the rotation. Although not shown, the drive transmission housing 9 is supported on a rail installed at the bottom of the start shaft 7 and can be moved and fixed along the rail.

In order to drive the small-diameter propulsion device having the above-described configuration to propel the propulsion pipe 3 and the like into the soil, the main push jack 8 is extended to extend the tip head 1, the propulsion pipe 3 and the casing pipe 4 subsequent thereto, The excavation bit 6 and the auger shaft 5 are pressed and propelled. At the same time, the auger hydraulic motor 10 is driven to rotate the auger shaft 5 and the excavation bit 6, and the ground bit is scraped off by the excavation bit 6, and the shaved earth and sand are carried backward in the casing tube 4 by the auger shaft 5. Then, the material is discharged from the earth discharge port 26 of the earth removing spacer 25 into the start shaft 7.

When the propulsion direction of the small-diameter propulsion device is to be corrected, the driving of the main push jack 9 and the auger hydraulic motor 10 is stopped, and the operator can use the ratchet handle 19 of the casing tube simple rotary shaft device A. Is reciprocated up and down around the shaft support. As a result, the small-diameter gear 18 and the annular large-diameter gear 15 are rotated, the casing pipe 4 connected thereto is rotated, the tip head 1 connected to the casing casing 4 at the tip is rotated, and the direction correcting body 2 is moved to a desired position. Rotate to position.

In this state, by driving the former pushing jack 8 and the auger hydraulic motor 10 again, the direction correcting body 2 of the tip head 1 hits the ground, and the tip head 1 advances to the opposite side of the direction correcting body 2. The propulsion direction of the small diameter propulsion device can be corrected.

In this way, by driving the main jack 8 and the auger hydraulic motor 10, the tip head 1 and the propelling pipe 3 following this propel the soil, and as shown in FIG. When the rearmost propelling pipe 3 connected to the device A approaches the start side wall of the start shaft 7 (left side wall in FIG. 1), the propulsion is stopped.

Then, as shown in FIG. 6, the earth removal spacer 25 is removed, the auger shaft 5 is removed from the drive transmission housing 9, the main push jack 8 and the drive transmission housing 9 are returned to the original positions in the oscillation shaft 7, Further, the simple rotating shaft device A for casing pipe is removed from the casing pipe 4 at the rearmost part.

Thereafter, a new casing pipe 4 is added to the rear end casing pipe 4, and a new propulsion pipe 3 is added to the rear end propulsion pipe 3. Similarly to the above, the simple rotary shaft device A for casing pipe is connected to the new casing pipe 4. 4 and propulsion pipe 3 are connected. Further, the newly connected rear end auger shaft 5 is connected to the drive transmission housing 9, and the earth removal spacer 25 is interposed between the casing tube simple rotating shaft device A and the drive transmission housing 9, and the main push is again performed. The jack 8 and the auger hydraulic motor 10 are driven to propel the tip head 1 and the propelling pipe 3 subsequent thereto into the soil.

7 and 8 are a longitudinal sectional view and a partially enlarged explanatory sectional view of a casing tube simple rotating shaft device A1 in which the structure of the propelling tube push ring 20 of the casing tube simple rotating shaft device A of the present invention is modified.

This simple rotating shaft device A1 for casing tube is provided with a tapered outer edge 20b by inclining the outer surface of the tip end of each small projection piece 20a of the propulsion tube push ring 20. As a result, as shown in FIG. 8, even the propulsion pipes 3 having different diameters can be locked at different portions of the tapered outer edge 20b, and can be applied to the propulsion pipes 3 having different diameters. .

FIGS. 9 and 10 are a longitudinal sectional view and a front view of a simple rotary shaft device A2 for a casing tube, which is a further modification of the configuration of a part of the simple rotary shaft device A for a casing tube of the present invention. In this simple rotating shaft device A2 for casing tube, the propelling tube pusher 27 is different from the propelling tube pusher 20 of the simple rotating shaft device A for casing tube. The propulsion tube pusher ring 27 is formed by projecting a plurality of projecting pieces 28 on the front surface of the annular body at intervals on the radiation of the central axis of the annular body. The provided key-type locking claw 29 is configured to be locked to the end of the propelling tube 3.

In the first embodiment, an example in which the direction is corrected by rotating the casing tube 4 and the tip head 1 has been described. However, the casing tube 4 and the tip head 1 are not limited to the direction correction and are used for other purposes. May be rotated.

(Embodiment 2)
The second embodiment is a small-diameter propulsion device that propels the soil with the pressing force of the main push jack, the tip head 1 and the casing tube 4 are rotated by a drive motor, and the auger shaft 5 is rotated for the casing tube. The auger shaft simple rotation shaft device B having a configuration substantially similar to that of the simple rotation shaft device A is configured to be rotated.

In the small-diameter propulsion device according to the second embodiment, as shown in FIG. 11, the rear end of the casing tube 4 is connected to a gear 37 that interlocks with the hydraulic motor 36 provided in the drive transmission housing 35 of the main push jack 8. The casing tube 4 is rotated by the hydraulic motor 36. Thereby, direction correction etc. are performed.

The auger shaft 5 extends to a hollow portion in the drive transmission housing 35 and is connected to an auger shaft simple rotary shaft device B provided in the hollow portion. The simplified auger shaft device B for auger shaft is not shown in the figure, but as in the first embodiment, the locking portions 13 and 13 (not shown) on both sides of the body frame 12 are guided by the push jack 8. The main body frame 12 is supported by being locked to a body (not shown). At this time, the locking portions 13 on both sides of the main body frame 12 project outside the drive transmission housing 35 through the openings on both sides of the drive transmission housing 35 and are supported by the guide body.

Then, as shown in FIG. 12, the rear end surface of the auger shaft 5 is brought into contact with the outer peripheral edge of the hole of the core tube 14 rotatably provided in the center hole 11 of the main body frame 12, and the core tube 14 and the bolt 16 are contacted. The bolt 24 is passed through the stepped hole 22 provided in the core tube 14 from the hole 21 on the outer surface of the annular large-diameter gear 15 integrated with the screw, and the screw hole 38 formed in the rear end surface of the auger shaft 5 The tip of the bolt 24 is screwed and tightened, and the auger shaft 5 and the annular large-diameter gear 15 are integrally fixed via the core tube 14.

As a result, when the operator reciprocally rotates the ratchet handle 19 in the vertical direction around the shaft support portion, the small-diameter gear 18 rotates, and the annular large-diameter gear 15 meshed with the small-diameter gear 18 rotates. As a result, the auger shaft 5 rotates. Although not shown, the drive transmission housing 35 is supported on a rail installed at the bottom of the start shaft 7 and can be moved and fixed along the rail.

Therefore, in the propulsion method, when excavation of the ground with the excavation bit 6 is necessary, when the soil is conveyed by rotating the auger shaft 5, if the operator operates the handle 19 with the ratchet, the auger shaft 5 Can be easily rotated and the discharged soil can be conveyed to the start shaft 7. Other configurations and operations are the same as those of the first embodiment.

(Embodiment 3)
In the third embodiment, in the small-diameter propulsion device that propels the soil with the pressing force of the main push jack, the simple rotation shaft device C for propulsion pipe having the same configuration as the simple rotation shaft device A for casing pipe is attached. Thus, the propulsion pipe 3 can be easily rotated.

In this case, the propulsion pipe simple rotating shaft device C is configured to connect the rear end surface of the propulsion tube 3 located at the rearmost portion and the annular large-diameter gear 15 of the propulsion pipe simple rotating shaft device C. Etc. are not required. Further, the auger shaft 5 and the auger shaft hydraulic motor 10 are not provided. Other configurations are the same as those of the first embodiment.

FIG. 13 shows a small-diameter propulsion device that pushes a plurality of propulsion pipes 3 sequentially connected by a main push jack 30 into the soil by pressing. The tip of the propelling tube 3 is connected to a tip head 31 whose tip is cut obliquely, and the tip surface of the tip head 31 is not open.

And the simple rotating shaft apparatus C for propulsion pipes is connected between the propulsion pipe 3 located in the last part among the several propulsion pipes 3 and the main pushing jack 30. FIG. First, although not shown in the drawing, the simple rotation shaft device C for the propulsion pipe is guided by the locking jacks 13 and 13 (not shown) on both sides of the main body frame 12 as in the first embodiment. The main body frame 12 is supported by being locked to a body (not shown).

Furthermore, as shown in FIG. 14, the rear end of the propulsion pipe 3 at the rearmost part is put into the central hole 11 of the main body frame 12 of the simple rotation shaft device C for propulsion pipe and applied to one outer peripheral side surface of the hole of the core pipe 14. Each bolt 24 is inserted into each stepped hole 22 from each hole 21 of the annular large-diameter gear 15, and further, a tip end portion is screwed into a screw hole 32 formed in the rear end surface of the propulsion tube 3, and each bolt 24 is tightened. .

As a result, the propulsion pipe 3 and the annular large-diameter gear 15 of the propulsion pipe simple rotating shaft C are integrally connected. Then, a drive transmission housing 34 provided at the front portion of the push jack 30 is applied with a spacer 33 interposed behind the propulsion tube simple rotating shaft C. In this state, the main push jack 30 is expanded and contracted, and the tip head 31 and the propelling pipe 3 following the propelling head 31 propel the soil. Although not shown, the drive transmission housing 34 is supported on a rail installed at the bottom of the start shaft 7 and can be moved and fixed along the rail.

When the propulsion direction is to be corrected, the driving of the main push jack 30 is stopped, and the operator reciprocates the handle 19 with a ratchet of the simple rotation shaft C for propelling pipes up and down around the shaft support portion. As a result, the small-diameter gear 18, the annular large-diameter gear 15, the propulsion pipe 3, and the tip head 31 rotate. Then, when the inclined surface of the tip head 31 is directed in the direction opposite to the direction desired to be bent and the main jack 30 is extended again in this state, the direction is corrected.

Thus, even in a small-diameter propulsion device that is only pushed in, the propulsion tube 3 can be easily rotated by attaching the propulsion tube simple rotation device C of the present invention. Therefore, the rotation of the propulsion pipe 3 can be used for other operations such as direction correction.

In the first and second embodiments, the earth removing spacer 25 or the spacer 33 is provided. However, the earth removing spacer 25 or the spacer 33 may not be provided. Alternatively, the space between the propulsion pipe simple rotating shaft device C and the drive transmission housing 9 or 34 is opened. In the case of the simple rotating shaft device A for casing pipe, the earth and sand can be discharged from the rear end of the communication hole 17 of the simple rotating shaft device A for casing pipe.

A Simple rotating shaft device for casing pipe
B Simple rotation shaft device for auger shaft C Simple rotation shaft device for propulsion tube 1 Tip head 2 Direction correction head 3 Propulsion tube 4 Casing tube
DESCRIPTION OF SYMBOLS 5 Auger shaft 6 Excavation bit 7 Starting shaft 8 Propulsion jack 9 Drive transmission housing 10 Auger hydraulic motor 11 Central hole 12 Main frame 13 Locking part 14 Core pipe 15 Annular large diameter gear 16 Bolt 17 Communication hole 18 Small diameter gear 19 Ratchet Handle 20 Propeller Push Wheel 20a Small Projection Piece 21 Hole 22 Stepped Hole 23 Screw Hole 24 Bolt 25 Earth Removal Spacer 26 Earth Removal Port 27 Propeller Push Wheel 28 Projection Piece 29 Locking Claw 30 Main Push Jack 31 Tip Head 32 Screw Hole 33 Spacer 34 Drive transmission housing 35 Drive transmission housing 36 Hydraulic motor 37 Gear 38 Screw hole

Claims (7)

By pushing the rear end of the propulsion pipe to which the tip head is connected by the main pushing device provided in the start shaft, the propulsion pipe is propelled while connecting a plurality of propulsion pipes in the soil. A driving motor having a drilling bit in the opening, a rotary shaft provided at the rear end of the drilling bit, the rotary shaft passing through a plurality of casing pipes connected to the propulsion pipe, and provided at the position of the main pushing device In the small-diameter propulsion device rotated by
A simple rotating shaft device for a casing tube is provided between the main pushing device and the rear end of the propulsion tube, and the simple rotating shaft device for the casing tube has locking portions provided on both sides of a main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main push jack of the pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the gear is also rotatably provided, supports a handle with a ratchet that rotates the small-diameter gear, and an annular propulsion-pipe push ring between the other side of the main body frame and the rear end of the propulsion pipe Intervene,
The annular large-diameter gear and the casing pipe at the rear end are connected through a central hole of the main body frame, and the rotary shaft connected to the rear end of the excavation bit is connected to the propelling pipe push ring , the central hole of the main body frame, and the large annular ring. By connecting the main pushing device through the diameter gear and rotating the handle with the ratchet, the small diameter gear and the annular large diameter gear are rotated, and the casing tube and the tip head are rotated by the rotation of the annular large diameter gear. A rotary shaft device in a small-diameter propulsion main pushing device.   The rotary shaft is an auger shaft, a soil removal spacer is provided between the casing tube simple rotation shaft device and the main pushing device, and the earth and sand excavated by the excavation bit at the tip is passed through the casing tube and the discharge port of the soil removal spacer. The rotary shaft device in the main pusher for small-diameter propulsion according to claim 1, wherein the rotary shaft device is configured to discharge from a small diameter. By pushing the rear end of the propulsion pipe to which the tip head is connected by the main pushing device provided in the start shaft, the propulsion pipe is propelled while connecting a plurality of propulsion pipes in the soil. A driving motor having a drilling bit in the opening, a rotary shaft provided at the rear end of the drilling bit, the rotary shaft passing through a plurality of casing pipes connected to the propulsion pipe, and provided at the position of the main pushing device In small-diameter propulsion method rotated by
A simple rotating shaft device for a casing tube is detachably provided between the main pushing device and a rear end of the propelling tube, and the simple rotating shaft device for the casing tube has a locking portion on both sides of a main body frame having a central hole. The main body frame is supported by engaging the guide bodies on both sides of the main jack of the main pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the radial gear is also rotatably provided, a handle with a ratchet that rotates the small-diameter gear is pivotally supported, and a propulsion pipe push ring is provided between the other side of the main body frame and the rear end of the propulsion pipe. Intervene,
The annular large-diameter gear and the casing pipe at the rear end are connected through a central hole of the main body frame, and the rotary shaft connected to the rear end of the excavation bit is connected to the propelling pipe push ring, the central hole of the main body frame, and the large annular ring. By connecting the main pusher through the radial gear and rotating the handle with the ratchet, the small-diameter gear and the annular large-diameter gear rotate, and the casing pipe and the tip head are rotated by the rotation of the annular large-diameter gear. A small-diameter propulsion method characterized by being made possible. By pushing the rear end of the propulsion pipe to which the tip head is connected by the main pushing device provided in the start shaft, the propulsion pipe is propelled while connecting a plurality of propulsion pipes in the soil. There is a drill bit in the opening, an auger shaft for earth removal is provided at the rear end of the drill bit, the auger shaft reaches the main pushing device through a plurality of casing pipes connected in the propulsion pipe, The tip of the casing pipe is connected to the tip head, and the tip head and the casing pipe are rotated by a small-diameter propulsion device that is rotated by a drive motor provided at the former pushing device location.
An auger shaft simple rotation shaft device is provided between the main pushing device and the rear end of the propelling tube, and the auger shaft simple rotation shaft device has locking portions provided on both sides of the main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main jack of the main pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the large-diameter gear is also rotatably provided, and a handle with a ratchet that rotates the small-diameter gear is pivotally supported.
The annular large-diameter gear and the auger shaft at the rear end are connected through a central hole in the main body frame, and the handle with the ratchet is rotated to rotate the small-diameter gear and the annular large-diameter gear. A simple rotating shaft device in a small-diameter propulsion main pushing device, wherein the auger shaft rotates by rotation. By pushing the rear end of the propulsion pipe to which the tip head is connected by the main pushing device provided in the start shaft, the propulsion pipe is propelled while connecting a plurality of propulsion pipes in the soil. There is a drill bit in the opening, an auger shaft for earth removal is provided at the rear end of the drill bit, the auger shaft reaches the main pushing device through a plurality of casing pipes connected in the propulsion pipe, The tip of the casing pipe is connected to the tip head, and the tip head and the casing pipe are rotated by a drive motor provided at the former pushing device location in a small diameter propulsion method,
An auger shaft simple rotation shaft device is provided between the main pushing device and the rear end of the propelling tube, and the auger shaft simple rotation shaft device has locking portions provided on both sides of the main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main jack of the main pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the large-diameter gear is also rotatably provided, and a handle with a ratchet that rotates the small-diameter gear is pivotally supported.
The annular large-diameter gear and the auger shaft at the rear end are connected through a central hole in the main body frame, and the handle with the ratchet is rotated to rotate the small-diameter gear and the annular large-diameter gear. A small-diameter propulsion method characterized in that the auger shaft is rotatable by rotation. In the small-diameter propulsion device that pushes the rear end of the propulsion pipe connected to the tip head by the main pushing device provided in the shaft and propels it while connecting a plurality of propulsion pipes in the soil,
A simple rotating shaft device for a propelling tube is provided between the main pushing device and the rear end of the propelling tube, and the simple rotating shaft device for the propelling tube has locking portions provided on both sides of a main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main push jack of the pushing device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the radial gear is also rotatably provided, and a handle with a ratchet that rotates the small-diameter gear is pivotally supported.
By connecting the annular large-diameter gear and the rear end of the propulsion pipe through the central hole of the main body frame, and rotating the handle with the ratchet, the small-diameter gear and the annular large-diameter gear rotate, and the annular large-diameter gear rotates. The rotary shaft device in the main pusher for small-diameter propulsion is characterized in that the propulsion pipe and the tip head rotate by the above. In the small-diameter propulsion method that pushes the rear end of the propulsion pipe connected to the tip head by the main pushing device provided in the shaft and connects the plural propulsion pipes in the soil,
A simple rotation shaft device for propulsion pipe is detachably provided between the main pushing device and the rear end of the propulsion tube, and the simple rotation shaft device for propulsion tube is provided with locking portions on both sides of a main body frame having a central hole. The main body frame is supported by engaging with guide bodies on both sides of the main push jack of the main push device, and an annular large-diameter gear that is rotatable with respect to the main body frame is provided on one side of the main body frame. A small-diameter gear that meshes with the large-diameter gear is also rotatably provided, and a handle with a ratchet that rotates the small-diameter gear is pivotally supported.
By connecting the annular large-diameter gear and the rear end of the propulsion pipe through the central hole of the main body frame, and rotating the handle with the ratchet, the small-diameter gear and the annular large-diameter gear rotate, and the annular large-diameter gear rotates. A small-diameter propulsion method characterized in that the propulsion pipe and the tip head can be rotated by the above-mentioned.

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