JPH0776987A - Swivel device for boring, and boring method - Google Patents

Abstract

PURPOSE:To dispense with that a worker climbs on a tower to perform the attachment and detachment of a wire to a swivel device, and allow the worker writing on the ground or on a working base on the ground to perform the wire attachment and detachment to the swivel device in that position. CONSTITUTION:A boring swivel device has a fixed part 20, a rotating part 30 rotatably connected to the fixed part 20, and an engaging and disengaging raising and lowering member 40 capable of being engaged and disengaged to the fixed part 20, and the fixed part 20 is formed to have a reversed truncated conical outer circumferential side surface in which the outer circumferential side surface 200 of its body 201 is gradually narrowed in diameter from the upper part to the lower part. The member 40 is formed into a cylinder or ring, and the inner circumferential surface is formed in such a manner that the diameter is gradually reduced from the upper part to the lower part with the same gradient as the outer circumferential surface gradient of the body 201. The member 40 can be fitted onto and engaged with, or separated from the body 201 by relatively rising and lowering to the body 201.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel device for boring used for boring ground and a boring method using the swivel device.

[0002]

2. Description of the Related Art Ground boring is a well for water supply,
It will be carried out to build wells and oil wells for hot springs, to survey the geology of structures and to form the foundation on the ground. A typical example of bowling is shown in FIG.
This will be described with reference to FIG.

As shown in FIG. 3, a turret 2 is assembled on a work table 1 assembled on the ground L, and a boring machine 4 is arranged on the table 1 via a base 3. A wire 6 is wound around a pulley 5 provided at the upper end of the turret 2. One end of the wire 6 is connected to a winch 7 installed on a boring machine 4 so that an article connected to the other end of the wire can be lifted and lowered. It has become.

As shown in FIGS. 3A and 3B, at the time of excavation, a swivel device 9 is hung from the other end of the wire 6 via a twisting back 8 and a shackle 81 connected thereto, and this device is suspended. The Kelly rod 10 and the air hammer drill 11 are sequentially connected to the rotating part of the. Drill 1
1 has a drill bit 12 at its lower end. Drill 1
1 and bit 12 form the original excavation.

The Kelly rod 10 is a rod having a quadrangular cross section, and an air passage is vertically penetrated therein. The lower end of the kelly rod 10 is connected to an air hammer type drill 11 via an intermediate joint member 13, and the kelly rod 10 is inserted into and held by a spindle 14 of a boring machine 4 so as to be vertically movable. Intermediate joint member 1
3 is detachably fitted to the small diameter portion 100 at the lower end of the rod 10 and is connected by a removable pin 131, and is also detachably fitted to the small diameter portion 110 at the upper end of the drill 11 for extraction. It is connected by a pin 132 which is possible [Fig. 3
(See (C)]. A seal member 133 is fitted in the member 13 so that upper and lower members fitted to the member 13 come into contact with each other.

An air hose 15 is connected to an air hose joint portion 91 of the swivel device 9 which is a fluid supply side fixed portion. In this example, compressed air is supplied from a compressor 16 attached to the boring machine 4. This air is
The swivel device 9, the kelly rod 10, the intermediate joint member 13, and the air hammer type drill 11 flow through the drill bit 12 to the outside and apply a drill hammer force to the drill bit 12 of the drill 11. In addition to the compressed air supply, the spindle drive unit 14 of the boring machine 4
By the drive of 1, the Kelly rod 10 and the air hammer type drill 11 and the excavation bit 12 connected thereto rotate,
The ground below the excavation bit 12 is excavated.

As the excavation progresses, the swivel device 9 becomes the spindle 1
When descending to the vicinity of 4, the tip of the wire 6 will be the winch 7
Kelly rod 1 by ascending by winding the wire
0 and the excavation parts 11 and 12 are lifted up, and then, as shown in FIG. 4, a side surface recess 111 provided in the head of the drill 11.
The supporting member 17 on the workbench 1 is inserted into the workbench 1 as shown in FIG. 3C, and the drill 11 is locked on the workbench 1.

Further, as shown in FIG. 5, the lower end portion 100 of the kelly rod 10 [FIG.
After the pin is removed from the intermediate joint member 13 by pulling up the rod, the rod is slightly raised, and then the boring machine 4 is laterally moved.
Is once placed on the base 3. Next, as shown in FIG. 6, the operator climbs up the ladder 18 provided on the turret 2 and attaches the shackle 81 connected to the twisting back 8 to the swivel device 9.
Remove from After that, the wire 6 is moved down and moved to the cover rod 19 which is an intermediate replenishing member lying at the cover rod standby position (not shown). A cover rod lifting auxiliary member 191 is detachably fitted to the small-diameter portion 195 at the upper end of the cover rod 19 at this point or before, and is connected by a pin 192 that can be pulled out.
In addition, a recess 194 for engaging a supporting member similar to that provided on the head of the drill 11 is formed on the upper portion of the auxiliary member 19, and the lower end portion of the small diameter portion 1 at the upper end of the drill 11 is formed.
10 or another cover rod 19 has an upper end small-diameter portion 195 formed with a recess into which it can be detachably fitted, and the small-diameter portion fitted therein is connected by a removable pin 193. The drill thin portion 110 and the cover rod thin portion 195 have the same diameter.

Next, the shackle 81 is connected to the auxiliary member 191, the cover rod 19 is lifted by the wire 6, and the cover rod 19 is connected to the air hammer type drill 11. Prior to this connection, the intermediate joint member 13 is removed from the drill 11, and the lower end of the cover rod 19 is detachably pin-connected to the top of the drill 11. Thus, a new excavation part to which the cover rod 19 is connected is formed.

Further, the shackle 81 is removed from the auxiliary member 191 by an operator on the workbench, the intermediate joint member 13 is connected to the upper end of the cover rod 19 in place of the auxiliary member 191, and then the operator returns to the ladder 18. Ascending and connecting the shackle 81 to the swivel device 9
To device 9 again. The swivel device 9 and the kelly rod 10 are again lifted by the wire 6, and the boring machine 4 is moved to the initial position.
The 0 bottom end is connected to the intermediate joint member 13.

In this way, as shown in FIG. 7, the boring can be restarted and the digging can be further advanced. When the excavation further progresses and the next cover rod 19 is connected between the already connected cover rod 19 and the kelly rod 10, the same work as the cover rod connecting work is repeated.

In the boring described above, compressed air is used as the excavating fluid, but in addition to this, a fluid such as a liquid or a slurry-like fluid is used to carry out the boring while letting this flow out from the excavating bit or its vicinity. There is also.

[0013]

However, in any case, the swivel device is connected to the upper end of the rod having the fluid passage hole, the excavation part is connected to the lower end of the rod, and the rod can be moved up and down by the rod rotation drive part. In boring performed while supplying the fluid for excavation to the excavation unit via the swivel device and the Kelly rod while rotating the excavation unit by rotating while holding it, like a cover rod with the progress of boring. Each time the splicing member is connected, the worker must climb the ladder of the turret, remove the wire from the swivel device, connect it to the splicing device, and then climb the ladder again and reconnect it to the swivel device. .

As described above, the work of attaching and detaching the wire connecting member such as the shackle is all performed by the operator, which is inefficient, and when attaching and detaching the wire connecting member to the swivel device,
Workers have to climb the ladder to work, which is very dangerous. Furthermore, since such wire connecting members are usually heavy items and often have oil or the like attached to them, they are slippery when handled with the hands fitted with rubber gloves, and the work of removing the connecting members and retightening them is very difficult. Difficult and risk falling. Boring work is often done in the mountains, but it is particularly difficult and painful in the winter because of the cold and freezing.
In addition, the turret and ladder freeze and become slippery, making the work even more dangerous.

Therefore, in the present invention, a swivel device is connected to an upper end of a rod having a fluid passage hole, an excavation unit is connected to a lower end of the rod, and the rod is rotated while being held by a rod rotation drive unit so that the excavation can be performed. In the boring performed while supplying a fluid for excavation to the excavation section through the swivel device and the rod while rotating the section, in connecting the replenishment member between the excavation section and the rod as the boring progresses, work It is not necessary for a worker to climb up a turret using a ladder to attach and detach the wire to and from the swivel device, and an operator standing on the ground or on a workbench on the ground can attach and detach the wire to and from the swivel device at that position. It is an object of the present invention to provide a swivel device for boring and a boring method using this device.

[0016]

A swivel device for boring according to the present invention, which solves the above-mentioned problems, comprises a fixed part on the fluid supply side and a rotary part on the fluid supply side rotatably connected to the fixed part. An engaging and disengaging lifting member that can be engaged with and disengaged from the fixed portion, and the fixed portion is formed in the shape of an inverted frustoconical outer peripheral side surface in which the outer peripheral side surface of the main body gradually decreases in diameter from top to bottom The engagement / disengagement lifting member is formed in a tube or ring shape, and the inner peripheral surface thereof is formed to have a gradually decreasing diameter from top to bottom at the same gradient as the outer peripheral side surface gradient of the fixing portion main body. It is characterized in that it can be externally engaged with the main body by being raised, and can be detached from the main body by being lowered with respect to the main body.

Further, in the boring method of the present invention for solving the above problems, a swivel device is connected to the upper end of a rod having a fluid passage hole, and an excavation part is connected to the lower end of the rod so that the rod can be moved up and down by a rod rotation drive part. In the boring method which performs boring while supplying the fluid for excavation to the excavation part via the swivel device and the rod while rotating the excavation part by rotating while holding, the swivel device as the swivel device. 2. The swivel device according to claim 1, wherein the upper end of the rod is connected to the rotating part of the swivel device to connect the replenishing member between the excavating part and the rod as the boring progresses. And the excavation unit by raising the main body while externally engaging and engaging the member with the main body of the swivel device fixing unit by suspending with a wire. Outside the excavation part by raising the rod to a predetermined position, holding the excavation part in that position, removing the rod from the excavation part, and laterally moving the rod rotation drive part while suspending it with a wire together with the swivel device. Moving to a position, lowering and stopping, lowering the wire to detach the engaging / disengaging member from the main body of the swivel device fixing part, and lowering to a position where an operator waits while the rod is loosely fitted. Step to make,
A step of removing the wire from the engagement / disengagement lifting member and connecting the wire to the splicing member that has been waiting in a predetermined position in advance; lifting the splicing member with a wire to move it to the excavating portion and connecting to the excavating portion. Step, remove the wire from the replenishing member and connect again to the engaging / disengaging lifting member,
Next, raising and lowering the wire to externally engage the engaging / disengaging raising / lowering member with the fixed portion main body, thereby further raising the swivel device to raise the rod.
The step of moving the rod rotation driving unit to the initial position to move the rod to the connecting member and connecting to the member is sequentially performed.

[0018]

According to the swivel device for boring and the boring method using this device of the present invention, the swivel device is connected to the upper end of the rod having the fluid passage hole and the excavation part is connected to the lower end of the rod, and the rod is connected to the rod as in the prior art. The excavation unit is rotated by being driven and rotated while being held up and down by the rotation drive unit, and the boring is performed while the excavation fluid is supplied to the excavation unit through the swivel device and the rod. .

In connecting the replenishment member between the excavation part and the rod as the boring progresses, first, the engagement / disengagement elevating / lowering member of the swivel device is lifted by a wire to externally engage with the main body of the swivel device fixing part. The swivel device is raised while being raised, whereby the excavation unit is lifted to a predetermined position and held at that position. Then, after the rod is removed from the excavation section by an operator on the ground or on a work table on the ground, the rod rotation drive section is laterally moved while the rod is suspended by a wire and moved to a position outside the excavation section. Be lowered. Next, when the wire is unloaded, the engagement / disengagement lifting member is detached from the fixing portion main body,
The rod is loosely fitted and lowered to a position where the operator stands by. Therefore, the worker removes the wire from the engagement / disengagement lifting member, the wire is connected to the replenishment member that has been waiting in a predetermined position in advance, and the replenishment member is hung by the wire and moved to the excavation unit, It is connected to the excavation section.

Next, a worker on the ground or on a workbench on the ground removes the wire from the connecting member, connects it again to the engaging / disengaging lifting member, and then raises the wire to lift / disengage the engaging / disengaging member. The member is externally fitted and engaged with the fixed portion main body. Further, the wire is pulled up and the swivel device is also pulled up to raise the rod, and the rod rotation drive unit is returned to the initial position, whereby the rod is moved to the replenishment member, and the member is moved. Connected to. Thus, a new excavation part including the additional member is formed, and the boring operation is restarted again.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a swivel device for boring which is one embodiment of the present invention, and FIG. 2 illustrates the usage state of the swivel device. The swivel device S includes a fixed part 20 on the fluid supply side, a rotary part 30 on the fluid supply side rotatably connected to the fixed part, and an engagement / disengagement lifting member 40 that can be engaged / disengaged with the fixed part. It consists of

The fixed portion 20 has a fixed portion main body 201 having an outer peripheral side surface 200 whose diameter is gradually reduced from the top to the bottom, and a fixed wearer main body 201, and a ring-shaped wear bushing 202 located inside the main body 201. A cylindrical side surface seal member 203 fitted to the main body 201 so as to surround the bushing 202,
It is composed of a cover member 204 fixed to the main body 201 with a bolt and an L-shaped tube 205 for an air hose joint screwed to the cover member 204. The wear bushing 202 and the seal member 203 are the cover member 20.
It is pressed down from above at 4. Also, the L-shaped tube 20
A ring-shaped seal member 205a is fitted to the lower end of the ring 5.

The rotating unit 30 includes a spindle 302, which is supported by a two-stage bearing 301 fitted below the bushing 202 in the main body 201 and is in close contact with the wear bushing 202 so as to be slidably rotatable. There is. The rotating portion 30 further includes a tube member 303 for connecting the kelly rod 10 that is screwed to the spindle 302, and a seal member 304 that is closely sandwiched between the lower end surface of the spindle 302 and the upper end surface of the tube member 303. The tube member 303 is fixed. It is tightly surrounded by an oil seal 305 attached to the body 201.

The engaging / disengaging member 40 is a ring-shaped or tubular member, and the inner peripheral side surface 400 thereof is formed to have a gradually decreasing diameter from top to bottom at the same slope as the outer peripheral side surface 200 of the fixed part main body 201. By being relatively raised with respect to the fixed part main body 201, the main body 201 can be externally fitted and engaged, and by being relatively lowered with respect to the main body 201, it can be detached from the main body. A ring portion 401 that can come into contact with the lower surface of the fixed portion main body 201 is integrally formed at the lower end.

A pair of eye bolts 41 are screwed on the upper surface of the engaging / disengaging member 40, and a hanging chain 42 is connected to these eye bolts. Next, an example of boring performed using the swivel device S described above will be described. Here, a case where the conventional swivel device 9 is used instead of the conventional swivel device 9 in the conventional boring work described with reference to FIGS. 3 to 7 will be described.

In the swivel device S of the present invention, as shown in FIG. 2, the chain 42 connected to the engaging / disengaging lifting member 40 is
The tip of the wire 6 fed out from the winch 7 is connected via a twisting back 8 and a shackle 81. Also,
L-shaped tube 205 on the cover member 204 in the fixed portion 20
The air hose 15 from the compressor 16 is connected to. Further, a female screw of the upper end small diameter portion 101 (see FIG. 1) of the Kelly rod 10 is screwed and connected to the tube member 303 of the rotating portion 30.

In the excavation work using the swivel device S, as in the conventional work, the kelly rod 1 having the fluid passage hole is formed.
0 The swivel device S is connected to the upper end and the lower end of the kelly rod 10 is initially connected to the excavating part (the drill 11 equipped with the bit 12), and the rod 10 can be moved up and down to the spindle 14 of the boring machine 4. Is inserted into.

In the swivel device S, the engaging / disengaging lifting member 4
0 is hung on the winch wire 6 via the chain 42,
The inner peripheral surface 400 is externally fitted and engaged with the outer peripheral side surface 200 of the swivel device fixing portion main body 201, and the ring portion 401 at the lower end of the elevating member 40 contacts the lower surface of the fixing portion main body. In this way, both the fixed portion 20 of the swivel device S and the rotating portion 30 connected thereto, and the Kerry rod 10 and the drill 11 connected to the rotating portion are suspended on the wire 6. In this state, in the swivel device S, the elevating member 40 that is in surface contact with and engages with the fixed part main body 201 in the swivel device S.
The relative rotation is sufficiently suppressed by mutual frictional force.

Then, the Kelly rod 10 is rotated by the drive rotation of the spindle 14 by the spindle drive unit 141, whereby the excavation units 11 and 12 are rotated, and the excavation unit 1 is moved through the swivel device S and the rod 10.
Compressed air is supplied to 1 and 12 and boring is performed. When the cover rod 19 is replenished between the excavation part (11, 12) and the kelly rod 10 as the boring progresses, the wire 6 is lifted to lift and lower the engaging / disengaging member 4.
The swivel device S is raised in a state where 0 is externally fitted and engaged with the main body 201 of the swivel device fixing portion 20, whereby the kelly rod 10, the air hammer type drill 11 and the drill bit 12 are raised. Next, as in the case shown in FIG. 4, the air hammer drill 11 is locked on the work table 1 by the support member 17. The worker continues to work on the kelly rod 10.
After removing the lower end from the intermediate joint member 13, the boring machine 4 is laterally moved to temporarily mount the kelly rod 10 on the base 3 as shown in FIG.
Next, by lowering the tip of the wire 6, the engaging / disengaging member 40 is detached from the fixed part main body 201, and is lowered to the position of the worker who stands by on the work table while being loosely fitted to the kelly rod 10. Here, the shackle 81 connected to the twisting back 8 is removed from the hanging chain 42 by the worker, and the shackle 81 is connected to the hoisting auxiliary member 191 connected to the cover rod 19.

Thus, when the wire 6 is connected to the cover rod 19, the wire is rolled up to raise the cover rod 19, and the air hammer type drill 11 is used as shown in FIG.
Connect to. Next, after the shackle 81 is detached from the auxiliary member 91 by the operator on the workbench and is again connected to the hanging chain 42, the wire 6 is lifted to move the engaging / disengaging lifting member 40 to the swivel device fixing portion main body 20.
1 is externally engaged to raise the entire swivel device S, thereby raising the kelly rod 10. Along with this, the boring machine 4 is laterally moved to the initial position,
The operator connects the lower end of the Kelly rod 10 to the cover rod 19 via the intermediate joint member 13. Thus, a new excavation part including the cover rod is formed as shown in FIG. 7, and the boring is restarted.

When the excavation further progresses and the next cover rod 19 is connected between the already connected cover rod 19 and the kelly rod 10, the same work as the cover rod connecting work is repeated. In this case, the excavated portion that is once lifted is placed on the work table by inserting the support member 17 into the recess 194 in the upper portion of the cover rod 19 in the excavated portion, as in the case of holding the drill 11 on the work table shown in FIG. Once held.

According to the swivel device S and the boring method using the swivel device S described above, the work of temporarily removing the wire 6 from the swivel device S in order to suspend the new cover rod 19 with the wire 6 for connecting and connecting the new cover rod 19 and the cover. After the rod is connected, the work of reconnecting the wire 6 to the swivel device S is performed by lowering the wire 6 and engaging / disengaging the lifting member 40.
It can be performed on the ground workbench 1 only by lowering the pedestal, and the operator does not need to go up and down the ladder 18 of the turret 2. Therefore, the boring work becomes simpler.

[0033]

According to the present invention, a swivel device is connected to an upper end of a rod having a fluid passage hole, an excavation unit is connected to a lower end of the rod, and the rod is rotated while being held by a rod rotation drive unit so as to be vertically movable. In boring performed while supplying the fluid for excavation to the excavation unit through the swivel device and the rod while rotating the excavation unit, in connecting the extension member between the excavation unit and the rod as the boring progresses. , It is not necessary for an operator to use a ladder to climb up a turret to attach / detach the wire to / from the swivel device, and a worker standing on the ground or on a workbench on the ground can attach / detach the wire to / from the swivel device at that position. It is possible to provide a swivel device for boring that can be performed and a simple boring method using this device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a swivel device that is an embodiment of the present invention.

FIG. 2 is a diagram showing a use state of the swivel device which is one embodiment of the present invention.

3A is a diagram showing an example of a conventional boring work, FIG. 3B is a side view of a swivel device portion used in the work, and FIG. 3C is a kelly rod and a drill. It is an exploded view of the connection mechanism with.

FIG. 4 is a diagram showing a state in which the excavation unit is temporarily pulled up and held in the boring operation of FIG. 3;

5 is a view showing a state in which the kelly rod is once placed on a workbench from the state shown in FIG.

FIG. 6 (A) is a view showing a state in which a cover rod is added to the original excavation portion, and FIG. 6 (B) is an exploded side view of the cover rod and an auxiliary member for lifting the cover rod.

FIG. 7 is a diagram showing a state in which boring is restarted by a new excavation portion formed by adding a cover rod.

[Explanation of symbols]

 1 Workbench 2 Turret 3 Base 4 Boring Machine 5 Pulley 6 Wire 7 Winch 8 Pinch Back 81 Shackle 9 Conventional Swivel Device 91 Air Hose Joint 10 Kelly Rod 11 Air Hammer Drill 12 Drill Bit 13 Intermediate Joint Member 14 Spindle 141 Spindle Drive Part 15 Air hose 16 Compressor 17 Support member 18 Ladder 19 Cover rod 191 Cover rod lifting auxiliary member 101 Kelly rod female screw part S Swivel device 20 fixing part 201 fixing part main body 200 outer peripheral side surface 202 main body 201 wear bushing 203 side surface Seal member 204 Cover member 205 L-shaped tube for air hose joint 30 Rotating part 301 Two-step bearing 302 Spindle 303 Kelly rod connecting pipe member 304 Series Member 305 Oil seal 40 Engagement lifting member 400 Inner peripheral side surface of member 40 41 Eye bolt 42 Hanging chain

Claims (2)

[Claims] 1. A fluid supply side fixed portion, a fluid supply side rotating portion rotatably connected to the fixed portion, and an engagement / disengagement lifting member that is disengageable with respect to the fixed portion. The fixing portion is formed in the shape of an inverted frustoconical outer peripheral surface whose outer peripheral side surface is gradually reduced in diameter from top to bottom, and the engagement / disengagement lifting member is formed in the shape of a cylinder or ring, and its inner peripheral surface is formed. Is formed to have a small diameter from the top to the bottom at the same gradient as the outer peripheral side surface of the fixed part main body, and by being raised with respect to the fixed part main body, it can be externally fitted and engaged with the main body, A swivel device for boring, which can be detached from the main body by being lowered. 2. A swivel device is connected to an upper end of a rod having a fluid passage hole, and an excavation part is connected to a lower end of the rod. The excavation part is rotated by rotating the rod while holding the rod in a vertically rotatable manner. In the boring method for performing boring while supplying a fluid for excavation to the excavation portion via the swivel device and the rod while performing the swivel device, the swivel device according to claim 1 is adopted as the swivel device, and the rotating portion is provided with the swivel device. The upper end of the swivel device is connected to the upper end of the rod by connecting the upper end of the rod, and the engaging / disengaging member of the swivel device according to claim 1 is hung by a wire to raise the member. A step of raising the excavation unit to a predetermined position by raising the main body while externally engaging with the swivel device fixing unit main body;
Holding the excavation part in its position, removing the rod from the excavation part and hanging the wire together with the swivel device by moving the rod rotation drive part laterally to move it to a position outside the excavation part and lowering it. Steps to stop,
A step of detaching the engagement / disengagement member from the swivel device fixing portion main body by lowering the wire, and lowering it to a position where an operator waits in a loosely fitted state on the rod; And connecting the wire to the replenishment member that has been waiting at a predetermined position in advance, lifting the replenishment member with a wire and moving it to the excavation unit, and connecting to the excavation unit, a wire from the replenishment member. Detaching and connecting again to the engaging / disengaging lifting member, and then raising the wire to externally engage the engaging / disengaging lifting member with the fixing portion main body, thereby further raising the swivel device to raise the rod. , Sequentially performing the steps of moving the rod rotation drive unit to the initial position to move the rod to the replenishment member, and connecting to the member. Bowling wherein the Rukoto.