JPH08121070A - Vertical hole drilling machine, and forming method of vertical hole by use thereof - Google Patents

Abstract

PURPOSE: To increase the working efficiency, by supplying and exhausting air from a pneumatic cylinder to vibrate a pneumatic vibrator and drive or draw a pile and preventing collapse of the bored hole and also preventing approach to the vibrator or the pile by use of support legs. CONSTITUTION: Pneumatic cylinders 2-4, a support part 9, a pneumatic vibrator of connection members, and a percussion bar 12, are moved up and down together by supplying or exhausting air from a pneumatic cylinder through changeover valves 14-16. The vibrator is actuated by supplying or discharging air through the changeover valves 14-16 and a pipe is detachably connected to the screw part 13 of the percussion bar 12. Collapse of the bored hole is prevented at the lifting or drawing time of the pneumatic vibrator and approach to the pneumatic vibrator or the pile 34 is prevented by the support legs 5-8. In this way, safety and stability are secured and accuracy or driving and drawing or the pile is increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical hole forming device applied to the ground without removing soil.

[0002]

2. Description of the Related Art Conventionally, a pile driving device is disclosed in Japanese Patent Laid-Open No. 3-17.
No. 388, which is for self-propelled impact excavator, especially for soil drilling, impact head (18) to which impact impulse is applied by impact piston (1) mounted on the propulsion side of cylindrical housing. ), The impact piston (1) can drive a pulsating reciprocating operation process by an energy carrier (7, 8, 9) that can be fed into the excavator, and the impact piston (1) can be tensioned periodically as an impact piston drive unit. A relaxing spring (17) is used. For example,
When a hollow is created in the roadbed of a railroad, etc., when reinforcing the roadbed by pouring chemicals into the hollow, the automatic propulsion type impact mining machine vertically propels the vertical hole to the hollow, afterwards,
The roadbed is reinforced by applying a shock to retreat and pulling it out of the soil.

[0003]

However, since the number of piles that can be driven in a day is small in an automatic propulsion type impact mining machine, work efficiency is poor, and an impact is generated even when the automatic propulsion type impact mining machine moves backward. In addition, since the pile is pulled out, the drilling hole is likely to collapse and it often happens that the chemical injection pipe cannot be inserted properly, which requires a great deal of construction time for chemical injection.

Therefore, an object of the present invention is to provide a vertical hole forming device which improves the efficiency of the work of driving and pulling out the pile without removing the soil, and prevents the collapse of the perforation when pulling out the pile. It is a thing.

[0005]

According to the present invention, a plurality of single-acting pneumatic cylinders provided upright, a support leg for movably supporting these pneumatic cylinders, and an upper end portion of a cylinder rod of the pneumatic cylinder are connected. A supporting portion, a connecting rod that hangs from the supporting portion, a pneumatic vibrator that is connected to the lower end of the connecting rod and hangs down, a striking rod that is connected to the lower end of this pneumatic vibrator, and the lower end of this striking rod. The vertical hole forming device is characterized by comprising a screw portion provided on the switch and a switching valve for switching supply and discharge of air pressure from the air pressure source to the pneumatic cylinder and the pneumatic vibrator.

It is preferable that the switching valve switches supply and discharge of air pressure to and from the pneumatic cylinder, switches supply and discharge of air pressure to and from the pneumatic vibrator, and switches communication and cutoff between the pneumatic cylinder and the outside air.

According to the present invention, the threaded portion of the upper portion of the pile is connected to the threaded portion of the striking rod, and the switching valve is switched to drive the pneumatic cylinder to drive the cylinder rod, the support portion, the connecting rod, and the pneumatic vibrator. And the striking rod and the pile are integrally lowered, the tip of the pile is brought into contact with the ground, the switching valve is switched to drive the pneumatic vibrator to drive the pile into the ground, and the switching valve is switched to switch the pneumatic vibrator. The supply of air pressure to the cylinder is cut off, the screwing of the screw part and the screw part of the upper end of the pile is released, and the switching valve is switched to drive the pneumatic cylinder to drive the cylinder rod, the support part and the connecting rod. The pneumatic vibrator and the striking rod are integrally lifted to stop the pneumatic cylinder, the threaded portion of the striking rod is connected to the threaded portion at the upper end of the connecting pile, and the switching valve is switched to switch the pneumatic cylinder. Drive the cylinder rod, the support portion, the connecting rod, the pneumatic vibrator, the striking rod, and the pile to lower them integrally, and screw the lower end of the connecting pile into contact with the upper end of the driven pile. The switching valve, the pneumatic vibrator is driven to drive the pile into the ground, the switching valve is switched to shut off the supply of air pressure to the pneumatic vibrator, and the screw portion of the striking rod and the connection pile are connected. The screw cylinder at the upper end is released, the switching valve is switched to drive the pneumatic cylinder, and the cylinder rod, the support portion, the connecting rod, the pneumatic vibrator, and the striking rod are integrally lifted to raise the pneumatic cylinder. The method is characterized in that the piles are driven to the ground while switching between the piles and stopping the piles and repeating such work to connect the piles.
The vertical hole forming method uses the vertical hole forming device.

According to the present invention, one standing pneumatic cylinder, supporting legs for supporting these pneumatic cylinders, an arm extending from the upper end of the cylinder rod of the pneumatic cylinder, and a wire hanging from this arm. , A pneumatic vibrator that hangs down connected to the wires, a striking rod connected to the lower end of the pneumatic vibrator, a screw portion provided at the lower end of the striking rod, the pneumatic cylinder and the pneumatic vibrator. And a switching valve for switching supply and discharge of air pressure from the air pressure source.

According to the present invention, one standing pneumatic cylinder, supporting legs for supporting these pneumatic cylinders, an arm extending from the upper end of the cylinder rod of the pneumatic cylinder, and a wire hanging from this arm. , A pneumatic vibrator that hangs down connected to the wires, a striking rod connected to the lower end of the pneumatic vibrator, a screw portion provided at the lower end of the striking rod, the pneumatic cylinder and the pneumatic vibrator. And a switching valve for switching supply and discharge of air pressure from the air pressure source.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The vertical hole forming apparatus 1 of the embodiment will be described below with reference to FIG. 1. The vertical hole forming apparatus 1 includes three obliquely erected pneumatic cylinders 2-4 and pneumatic cylinders 2-4. Support legs 5 to 8 for supporting the above, a support portion 9 for connecting the upper end portions of the cylinder rods 2a to 4a of the pneumatic cylinders 2 to 4,
A connecting rod 10 hanging from the support portion 9, a pneumatic hand breaker 11 as a pneumatic vibrator that linearly connects to the end of the connecting rod 10, a striking rod 12 attached to the lower end of the hand breaker 11, and a striking rod. The rod 12 includes a male screw portion 13 provided at a lower end portion thereof, pneumatic cylinders 2 to 4 and pneumatic switching valves 14 to 16 for switching supply and discharge of air to and from the hand breaker 11.

More specifically, the supporting legs 5 to 7 are hinges 5.
It is connected to the pneumatic cylinders 2 to 4 via a to 7a and can swing. The supporting legs 5 to 8 are connected by reinforcing plates 5b to 7b. Pneumatic cylinder 2
Reference numeral 4 designates 1101 to 1200 strokes and a cylinder inner diameter φ80. The cylinder rods 2a to 4a can be moved up and down by supplying and discharging air pressure from the compressor 17 shown in FIG.
4a on top, cylinder head down, and
The pneumatic cylinders 2 to 4 are arranged so as to be inclined so that the interval becomes narrower as they go upward. The upper ends of the cylinder rods 2a to 4a are connected to the supporting portion 9 via hinges 9a to 9c so that the cylinder rods 2a to 4a are prevented from being twisted when the cylinder rods 2a to 4a are moved up and down. The support portion 9 and the upper end of the connecting rod 10 are connected by screws, and the connecting rod 10
The lower end of the hand breaker and the front side of the hand breaker 11 are connected so as to form a straight line.

The hand breaker 11 is used for the crushing of concrete roads and foundations, the breaking of asphalt roads, the removal of slag in the furnace, etc. due to the impact force generated by air pressure, and the total length is 556 mm and the weight is 21.
Kg, cylinder bore 40mm, hammer stroke 1
65 mm, number of hits 1,100 b. p. m, air consumption 1.4 m / min, hose diameter 19 mm, shank size 30φ × 87 liters, and a striking rod 12 is rotatably fitted and connected to the lower end of the hand breaker 11. The air pressure supplied to the hand breaker 11 causes the striking rod 12 to periodically vibrate.

The striking rod 12 having a cylindrical cross-section in FIG. 2 is formed so as to widen toward the bottom, and an annular step portion 12a is provided around the lower end thereof. 13 extends downward, an annular flange 12b is provided at the upper end, and the flange 12b is rotatably and detachably fitted to the holder of the hand breaker 11.

Next, the pneumatic circuit of FIG. 3 will be described. The compressor 17 is connected to the pipe 20, and the branch portion 21 is connected.
The pipes 22 and 23 are separated from each other, and the switching valve 14 is provided in the middle of the pipe 22. The switching valve 14 is a two-position switching valve, the pipes 24a to 27a are separated from the branch portions 24 to 25, and the pneumatic cylinders 2 to 4 are connected in parallel. By switching the switching valve 14 on and off, air pressure can be supplied and discharged,
In response to this, the cylinder rods 2a to 4a, the support portion 9, the connecting rod 10, the hand breaker 11, and the striking rod 12 can be integrally raised and lowered, and at this time, the hinges 5a to 7a.
Of pneumatic cylinders 2-4 and cylinder rod 2
It is configured to move up and down so that the inclinations of a to 4a change, and the supporting portion 9, the connecting rod 10, the hand breaker 11, and the striking rod 12 are vertically moved. Tube 24a
The pipes 28a to 31a, which are different from the pipes 27a to 27a, are attached to the pneumatic cylinder 2.
4 to 4, they are gathered at branch portions 26 and 27, and are connected to the switching valve 16 and the air vent 18. The switching valve 16 is a two-position switching valve, and the air vent 18 and the atmosphere communicate with each other or are shut off according to ON / OFF of the switching valve 16. On the other hand, in the middle of the pipe 23, the switching valve 1
5 is provided so that the air pressure can be supplied to or cut off from the hand breaker 11 according to the on / off state of the switching valve 15.

The conduit 30 shown in FIG. 4 is a cylindrical steel pipe for driving into a roadbed 42 or a roadbed 41 which will be described later. The pile 31 of FIG. 5 has a cylindrical shape with a diameter that can be inserted into the conduit 30, a female screw portion 32 that can be screwed into the male screw portion 13 of the striking rod 12 is provided at the upper end, and a sharp portion 33 is provided at the lower end. Is provided. The pile 34 for driving the roadbed 41 of FIG. 6 has a smaller diameter than the pile 31, a female screw portion 35 that can be screwed into the male screw portion 13 of the striking rod 12 is provided at the upper end, and cut grooves 36a to 36d are provided at the lower end. A sharp portion 37 is provided.

The connecting pile 38 shown in FIG. 7 has the same diameter as the pile 34 shown in FIG. 6, and can be connected to the pile 38. The upper end of the connecting pile 38 can be screwed to the male screw portion 13 of the striking rod 12. A female screw portion 39 is provided, and a male screw portion 40 is provided at the lower end. FIG. 8A shows a pull-out tool, which has a cylindrical connector 50 in which female threads 51a and 51b are provided at the upper and lower ends, respectively, and a male thread portion of a ring 52 is screwed into the female thread portion 51b. Chain 54
And the circular hole 56 and the elliptical hole 5 that are connected to the lower end of the chain 54.
7 and a retaining plate 55. This extractor is for extracting the conduit 30. FIG. 8B shows a retaining plate 58 having a round hole 59 and an elliptical hole 60. The pulling tool in which the retaining plate 55 in FIG. 8A is replaced with the retaining plate 58 is a pile 34, 38. Will be pulled out.

The operation of this embodiment when it is applied to driving a pile into an iron roadbed will now be described with reference to FIGS. 1 to 9. FIG. 9 shows a roadbed 42 and sleepers 43 on a roadbed 41.
And the rail 44 are arranged, the vertical hole forming device 1 is installed on the roadbed 42, and the switching valve 14 of FIG. 2 is switched on.
Cylinder rods 2a to 4a, supporting portion 9, connecting rod 10, hand breaker 11, striking rod 12 (hereinafter referred to as hand breaker 1
(Referred to as "1", etc.) is integrally raised to an appropriate position to turn off the switching valve 14 to stop the hand breaker 11 etc. First, the conduit 30 of FIG. 4 is driven through the track 42. These are piles 3 to be described later on the roadbed 42 and the roadbed 41.
This is to prevent the vertical holes from collapsing in the track bed 42 when the vertical holes are formed by driving the Nos. 4 and 38, and these holes are pulled out. The female screw portion 32 of the pile 31 of FIG. 5 is screwed into the male screw portion 13 of the striking rod 12 of FIG. 2, the conduit 30 is fitted onto the pile 31 from below, and the upper peripheral portion of the conduit 30 is attached to the striking rod 1
When fitted in the second step 12a, the state shown in FIG. 9 is obtained. At this time, the sharp portion 33 is slightly exposed from the lower end of the conduit 30.

When the switching valve 16 is turned on so that the air in the pneumatic cylinders 2 to 4 communicates with the atmosphere, the weight of the hand breaker 11 or the like causes the air to be discharged from the air vent 18 to the atmosphere, so that the hand breaker 11 or the like gradually opens. As it descends, the lower end of the conduit 30 and the sharp portion 33 of the pile 31 come into contact with the track bed 42, and the conduit 30 and the pile 31 are stopped. When the switching valve 15 is switched on, the hand breaker 1
1 is supplied with air pressure and vibration is applied to the striking rod 12 to drive the conduit 30 and the pile 31 into the roadbed 42 and the roadbed 41. Since the switching valve 16 is on and the pneumatic cylinders 2 to 4 are in communication with the atmosphere, the impact force of the impact rod 12 drives the conduit 30 and the pile 31 to lower the hand breaker 11 and the like. At this time, the conduit 30 is not entirely driven into the road bed 42, but a part of the conduit 30 is slightly projected above the ground surface, and the switching valve 15 is switched off.

Next, when the switching valve 16 is turned off to cut off the communication with the atmosphere and the switching valve 14 is turned on to supply air pressure to the pneumatic cylinders 2 to 4, the hand breaker 11 etc. and the pile 31 are raised, and the roadbed. The pile 31 is pulled out from the conduit 30 that is still driven into the road base 42 and the roadbed 41. The switching valve 14 is turned off to stop the hand breaker 11 and the like, the conduit 30 and the pile 31, and the screwing is released to separate the pile 31 from the striking rod 12.

The female screw portion 35 of the pile 34 shown in FIG. 6 and the male screw portion 13 of the striking rod 12 shown in FIG. 2 are screwed together to connect the two as shown in FIG. When the switching valve 16 is turned on, the air in the pneumatic cylinders 2 to 4 communicates with the atmosphere, and the weight of the hand breaker 11 or the like causes the air to be discharged from the air vent 18 to the atmosphere, so that the hand breaker 11 or the like gradually descends. Yuki, the sharp part 3 of the pile 34
When the 7 comes into contact with the track 42, the hand breaker 1
The first grade and the pile 34 are stopped. When the switching valve 15 is switched on, air pressure is supplied to the hand breaker 11 and vibration is applied to the striking rod 12, so that the pile 34 is moved to the road bed 42 and the roadbed 4.
When it is driven to 1, the switching valve 15 is switched off.

In this state, the striking rod 12 is rotated to rotate the pile 34.
The female screw portion 35 and the male screw portion 13 of the striking rod 12 are unscrewed. Next, the switching valve 16 is turned off to cut off communication with the atmosphere, and the switching valve 14 is turned on to turn the pneumatic cylinder 2
When air pressure is supplied to ~ 4, the stakes 34 are moved to the road bed 42 and the roadbed 4.
The hand breaker 11 and the like ascend in a state where the hand breaker 11 is driven. The switch valve 14 is turned off and the hand breaker 11
Etc. are stopped.

The female screw portion 39 of the pile 38 and the male screw portion 13 of the striking rod 12 are screwed together to connect them to each other, so that the pile 38 is striking the rod 1.
Make it hang from 2. When the switching valve 16 is turned on, the air in the pneumatic cylinders 2 to 4 communicates with the atmosphere, and the weight of the hand breaker 11 or the like causes the air to be discharged from the air vent 18 to the atmosphere, so that the hand breaker 11 or the like gradually descends. Then, the upper end of the pile 34 and the lower end of the pile 38 are brought into contact with each other. By rotating the male screw portion 40 of the pile 38, the female screw portion 35 of the pile 34 is rotated.
Screw it in. When the switching valve 15 is switched on, air pressure is supplied to the hand breaker 11 and vibration is applied to the striking rod 12, and when the piles 34 and 38 are driven into the roadbed 42 and the roadbed 41 and descend, the switching valve 15 is switched off. . In this state, the striking rod 12 is rotated to rotate the female screw portion 39 of the pile 38.
And the external thread 13 of the striking rod 12 is unscrewed.

Next, when the switching valve 16 is turned off to cut off the communication with the atmosphere, and the switching valve 14 is turned on to supply air pressure to the pneumatic cylinders 2 to 4, the piles 34 and the piles 38 are connected to the roadbed 4.
The hand breaker 11 and the like ascend in a state where the hand breaker 11 is driven. The switch valve 14 is turned off and the hand breaker 11
Etc. are stopped. After that, the same work is repeated, and the piles 38 are connected one after the other until the pointed portion 37 of the pile 34 reaches the cavity in the roadbed, and the piles 38 are driven in.

The operation of the present embodiment applied to pulling out a pile driven into an iron roadbed will be described with reference to FIGS. 1 to 9. The female screw portion 51a of the connector 50 shown in FIG. 12 is screwed into the male screw portion 13 and is inserted into the driven conduit 30 through the elliptical hole 57 from above, and the switching valve 16 is turned off to cut off communication with the atmosphere.
When 4 is turned on and air pressure is supplied to the pneumatic cylinders 2 to 4, the hand breaker 11 and the like are raised, and the conduit 30 is pulled out from the road bed 42 and the roadbed 41. At this time, the latch plate 55
However, the latch plate 55 can be latched with the conduit 30 by the lever principle and the conduit 30 can be pulled up when it is inclined to some extent. The switching valve 14 is turned off to stop the hand breaker 11 and the like, the conduit 30 is removed from the elliptical hole 57, and the female screw portion 5 of the connector 50 is removed.
The screwing of 1a and the male screw portion 13 of the striking rod 12 is released.

Similarly, for pulling out the piles 34 and 38, the female threaded portion 51a of the connector 50 is screwed into the male threaded portion 13 of the striking rod 12, and the pile 38 is inserted into the elliptical hole 60 from above. When the switching valve 16 is switched off to cut off the communication with the atmosphere, and the switching valve 14 is switched on to supply the pneumatic pressure to the pneumatic cylinders 2 to 4, the hand breaker 11 and the like are raised, and the piles 34 and the piles 38 are connected to the bed 42. Pulled out of the roadbed 41. At this time, the latch plate 58 is pulled up, but when it is tilted to some extent, the latch plate 58 can be latched to the pile 38 by the lever principle and the pile 38 can be pulled up. The switching valve 14 is turned off, the hand breaker 11 and the like are stopped, the piles 34, 38 are removed from the elliptical hole 60, and the screw engagement between the female screw portion 51a of the connector 50 and the male screw portion 13 of the striking rod 12 is released.

Next, the structure and operation of the pneumatic circuit of FIG. 10 will be described. This pneumatic circuit is shown in FIG.
And the operation are the same, but the configuration is different, and the description of the same parts will be omitted. Pipe 22 and air outlet 7
0a is connected to the input port of the push button type 4-port 3-position switching valve 70, and the pipes 72 and 74 are connected to the output port of the 4-port 3-position switching valve 70. A relief valve 80 is provided in the middle of the pipe 74. The pipe 72 branches into pipes 72a to 72c at a branch portion 76 and is connected to one chamber of double-acting pneumatic cylinders 92 to 94. The pipe 74 branches into pipes 74a to 74c at a branch portion 78 and is connected to another chamber of the double-acting pneumatic cylinders 92 to 94. The double-acting pneumatic cylinders 92-94 have cylinder rods 92a-
It has 94a.

Explaining the operation of the pneumatic circuit, in the figure, the 4-port 3-position switching valve 70 is in the shut-off state at the middle position shown in FIG. 10, but when it is switched to the upper position, air passes through the pipes 72, 72a to 72c. Pneumatic cylinders 92-9
4 is supplied to one chamber and air is discharged from the other chamber from the air outlet 70a via the pipes 74, 74a to 74c, and the cylinder rods 92a to 94a rise. On the other hand, when the air is switched to the lower position, the air is supplied to the pipes 74, 74a to 74a.
In addition to being supplied to another chamber via c, the air is discharged from one chamber of the pneumatic cylinders 92 to 94 through the pipes 72 and 72a to 72c from the air outlet 70a. At this time conduit 3
When 0 or the pile 31 comes into contact with the roadbed 42, the cylinder rods 92a to 94a stop and excess air pressure is supplied to other chambers, but the relief valve 80 operates to reduce the air pressure to an appropriate pressure.

Another embodiment of the present invention will be described with reference to FIG. The vertical hole forming apparatus 101 of this embodiment has substantially the same basic configuration and effect as those of the above-described embodiment, but one pneumatic cylinder 102 is vertically installed and the wire 110 is provided.
The difference is that the hand breaker 111 is suspended by c or the like. A cover 109 is attached to the connecting portion of the support legs 105 to 108. The pneumatic cylinder 102 has a base plate 102b connecting the supporting legs 108.
It is fixed with bolts and nuts and extends vertically upward. Arm 1 laterally from the tip of cylinder rod 102a
09 is stretched. A ring 110a is provided on the arm 109.
And the chain 110b are connected. A ring 110d and a chain 110e are connected to the upper end of the hand breaker 111 via a vibration-proof rubber 110f. The chain 110b and the chain 110e are connected by a wire 110c.

The pneumatic circuit is almost the same as the pneumatic circuit of FIG. 3 described above, except that a single pneumatic cylinder is used, and the description thereof will be omitted. The operation is almost the same as that of the above-described embodiment, but in this embodiment, the cylinder rod 1
The difference is that 02a reciprocates vertically. Another difference is that the arm 109 suspends the hand breaker 111. In addition, the pneumatic cylinder of the present embodiment can be downsized and used as a device for driving piles.
In addition to the connection port for the compressor and the connection port for the switching valve, the connection port 21 is provided with another connection port 21, which can be connected to a separate device for extracting the pile. Therefore, it is possible to use the pile driving device of this embodiment in combination with another pile drawing device, which contributes to efficiency improvement.

Although the present embodiment has been described above, it goes without saying that the structure of the present invention can be appropriately changed without departing from the technical idea of the present invention. The hand breaker may be a pneumatic vibrator having another structure such as a pick hammer. FIG.
It is also possible to integrate the switching valve 70 and the switching valve 15 of the pneumatic circuit of 0 into one 5-port 4-position valve. It goes without saying that an electronic control circuit can be used as the electromagnetic switching valve instead of the manual valve. Also, instead of the connecting rod 10, a wire may be used for connection.

[0031]

As described above, according to the present invention, the pneumatic cylinder, the supporting portion, the connecting member, the pneumatic vibrator, and the striking rod can integrally move up and down by supplying / exhausting air from the pneumatic cylinder by the switching valve and switching the switching. Air is supplied and discharged from the pneumatic cylinder by the valve, the vibrator can vibrate, the pipe can be freely attached to and detached from the threaded part of the striking rod, and the number of piles that can be driven in a day increases dramatically, and the pneumatic vibrator Since the pile is not pulled out by applying an impact when rising, the hole for drilling is unlikely to collapse and insertion of a chemical injection pipe or the like is extremely good. Since the pneumatic vibrator can be used as a commercial product with a slight modification, it is a specialized machine and has excellent versatility and can be used at low cost. In addition, the support legs block access to the pneumatic vibrator and piles, providing excellent safety and stability, as well as high accuracy in driving and withdrawing.

[Brief description of drawings]

FIG. 1 is a perspective view of the present embodiment.

FIG. 2A is a front view of a striking rod of the present embodiment, and FIG.
Is a plan view and (c) is a bottom view.

FIG. 3 is a configuration diagram of a pneumatic circuit of the present embodiment.

FIG. 4 (a) is a front view of a pipe for a roadbed of this embodiment,
(B) is an AA sectional view of (a).

FIG. 5 (a) is a front view of a pile for a roadbed of this embodiment,
(B) is a BB sectional view of (a), and (c) is a bottom view.

FIG. 6A is a front view of a pile for a roadbed of the present embodiment,
(B) is a BB sectional view of (a), and (c) is a bottom view.

FIG. 7A is a front view of a relay pile of this embodiment,
(B) is a DD sectional view of (a), and (c) is a bottom view.

FIG. 8A is a front view of the pile pulling tool of the present embodiment,
(B) is a front view of the locking plate of another extraction tool.

FIG. 9 is a configuration diagram when this embodiment is applied to pile driving on a railway roadbed.

FIG. 10 is a configuration diagram of a modified example of the pneumatic circuit.

FIG. 11 is a perspective view of another embodiment.

[Explanation of symbols]

 1, 101 Vertical hole forming device 2-4, 102 Pneumatic cylinder 102b Substrate 2a-4a, 102a Cylinder rod 5-8, 105-108 Support leg 5a-7a Hinge 5b-7b Reinforcing plate 9 Support 109 Arm 9a-9a Hinge 10 connecting rod 110c wire 11,111 hand breaker 12 striking rod 12a step part 12b collar part 13 male screw part 14-16 switching valve 17 compressor 18 air vent 20,22,23,24a-31a pipe 21,24-27 branch part 30 conduit 31, 34, 38 Pile 32, 35, 39 Female screw portion 33, 37 Sharp portion 36a to 36d Cutting groove 40 Male screw portion 41 Roadbed 42 Roadbed 43 Sleeper 44 Rail 50 Connector 51a, 51b Female screw portion 52, 53 Male screw portion 54 Chain 55 , 58 Hook plate 56, 59 Round hole 57 , 60 Elliptical hole 70 Switching valve 72, 74, 72a to 72c, 74a to 74c Pipe 76, 78 Branch portion 80 Relief valve 92 to 94 Pneumatic cylinder 92a to 94a Cylinder rod

Claims (4)

[Claims] 1. A plurality of upright pneumatic cylinders, a support leg for movably supporting these pneumatic cylinders, a support portion for connecting an upper end portion of a cylinder rod of the pneumatic cylinder, and a support portion depending from the support portion. Connecting member, a pneumatic vibrator connected to the lower end of the connecting member to hang down, a striking rod connected to the lower end of the pneumatic vibrator, a screw portion provided at the lower end of the striking rod, and the pneumatic pressure. A vertical hole forming device comprising a cylinder and a switching valve for switching supply and discharge of air pressure from an air pressure source to a pneumatic vibrator. 2. The switching valve switches supply and discharge of air pressure to and from the pneumatic cylinder, switches supply and discharge of air pressure to and from the pneumatic vibrator, and switches communication and cutoff between the pneumatic cylinder and outside air. The vertical hole forming device according to claim 1. 3. The screw portion of the striking rod is connected to the screw portion of the upper end of the pile, and the switching valve is switched to drive the pneumatic cylinder to drive the cylinder rod, the support portion, the connecting rod, the pneumatic vibrator, and the striking portion. Lower the rod and the pile together,
The tip of the pile is brought into contact with the ground, the switching valve is switched to drive the pneumatic vibrator and the pile is driven into the ground, the switching valve is switched to shut off the supply of air pressure to the pneumatic vibrator, and the screw portion The screwing with the threaded portion of the upper end of the pile is released, the switching valve is switched to drive the pneumatic cylinder, and the cylinder rod, the support portion, the connecting rod, the pneumatic vibrator, and the striking rod are integrally lifted. The pneumatic cylinder is stopped, the screw part of the striking rod is connected to the screw part at the upper end of the connecting pile, and the switching valve is switched to drive the pneumatic cylinder to drive the cylinder rod, the support part, the connecting rod, and the pneumatic vibrator. And the striking rod and the pile are integrally lowered, the lower end of the connecting pile is brought into contact with the upper end of the driven pile and screwed, and the switching valve is switched to switch the pneumatic vibrator. Drive the pile to the ground, switch the switching valve to shut off the supply of air pressure to the pneumatic vibrator, and release the screwing of the striking rod and the screw at the upper end of the connecting pile. Then, the switching valve is switched to drive the pneumatic cylinder to integrally raise the cylinder rod, the supporting portion, the connecting rod, the pneumatic vibrator, and the striking rod to switch the pneumatic cylinder to stop the operation. The vertical hole forming method using the vertical hole forming apparatus according to claim 1, wherein the pile is driven repeatedly into the ground while connecting the piles. 4. An upright pneumatic cylinder, a supporting leg for supporting these pneumatic cylinders, an arm extending from an upper end of a cylinder rod of the pneumatic cylinder, and wires hanging down from the arm. , A pneumatic vibrator which is connected to the wires and hangs down, a striking rod connected to the lower end of the pneumatic vibrator, a screw portion provided at the lower end of the striking rod, and pneumatic pressure to the pneumatic cylinder and the pneumatic vibrator. A vertical hole forming device, comprising: a switching valve that switches between supplying and discharging air pressure from a source.