JP2002129867A - Rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rod capable of supplying air to individual air hammers of a multiple air hammer device and efficiently discharging earth. SOLUTION: The rod 1 comprises a plurality of air supply pipes 3A, 3B and so forth arranged around a hollow main pipe 2. An auger blade 5 is mounted around the main pipe 2 and flanges 6a and 6b are formed at both ends of the blade. Air is supplied to the individual air hammers of the multiple air hammer device via the air supply pipes 3A, 3B and so forth. The air hammers can thus be actuated individually. By using the auger blade 5, the excavated earth and sand can be efficiently discharged regardless of the excavation distance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rod, and more particularly to a rod used for a multi-air hammer device having a plurality of air hammers.

[0002]

2. Description of the Related Art A multi-air hammer device is disclosed in
As disclosed in Japanese Patent No. 5195, the air hammer is configured by bundling a plurality of air hammers, and the air supplied from one air supply line is distributed and supplied to each air hammer.

[0003]

For this reason, the conventional multi-air hammer has a drawback that each air hammer cannot be operated individually.

[0004] Further, in the conventional multi-air hammer device, excavated earth and sand is discharged by exhausting the air hammer.
In the discharge of soil by the exhaust of the air hammer, a rod having an outer diameter larger than the excavation diameter is required in order to secure a supply air amount and an air passage cross-sectional area, which is disadvantageous in weight and cost. In addition, there is a drawback that depending on the excavation distance, uncertainty is caused by the exhaust resistance.

The present invention has been made in view of such circumstances, and has as its object to provide a rod that can individually supply air to each air hammer of a multi-air hammer device.

[0006]

In order to achieve the above object, the present invention is connected to a multi-air hammer device having a plurality of air hammers, supplies air to the multi-air hammer device, and provides a rotary / propulsive force. A main pipe formed in a hollow shape, a plurality of air supply pipes disposed around the main pipe and individually supplying air to the air hammer, and a connection formed at both ends of the main pipe. And a rod comprising:

According to the present invention, air can be individually supplied to each air hammer from a plurality of air supply pipes provided around the main pipe. Thereby, each air hammer can be operated individually. Moreover, the excavated earth and sand can be efficiently discharged regardless of the excavation distance by the auger blade attached around the main pipe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a rod according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1, 2 and 3 are a side view, a front view and a side sectional view, respectively, showing the configuration of an embodiment of the rod according to the present invention. FIG. It is sectional drawing. The rod 1 shown in FIG. 1 is applied to a multi-air hammer apparatus having three air hammers, and three air supply pipes 3A, 3B, 3C and one water supply pipe 4 are provided around a main pipe 2. It is configured to be integrally fixed.

The main pipe 2 is formed in a hollow shape, and an auger blade 5 formed in a spiral shape is integrally fixed to a peripheral surface thereof. Rods 1 are provided at both ends of the main pipe 2.
Flanges 6a and 6b for connecting each other are integrally fixed. A plurality of bolt holes 7, 7,... For fastening the flanges with bolts are formed in the flanges 6a, 6b. Positioning pins 8 protrude from one flange 6a. Rods connected to each other by fitting the positioning pins 8 into pin holes (not shown) formed in the flange 6b on the other side. Are positioned relative to each other. That is, the main pipes, the air supply pipes, and the water supply pipes of the rods 1 connected to each other are positioned so as to communicate with each other.

The three air supply pipes 3A, 3B, 3C are formed in a hollow shape and have the same length as the main pipe 2. These three air supply pipes 3A, 3B, 3C
Are arranged in parallel with the main pipe 2, and are arranged at equal intervals on a concentric circle centered on the main pipe 2. Also,
The three air supply pipes 3A, 3B, 3C are integrally fixed to the peripheral surface of the main pipe 2 via fixing parts 3a, 3b, 3c, respectively.

The water pipe 4 is formed in a hollow shape and has the same length as the main pipe 2. This water pipe 4
Are arranged in parallel with the main pipe 2 and are integrally fixed to the peripheral surface of the main pipe 2 via a fixing portion 4a.

The rod 1 of the present embodiment is configured as described above. According to the rod 1, the air supply pipes 3A, 3A
Since three B and 3C are provided independently, air can be individually supplied to each air hammer. Thereby, each air hammer can be operated individually. Further, the auger blades 5 can efficiently excavate excavated earth and sand regardless of the excavation distance.

Next, the configuration of a multi-air hammer device using the rod 1 of the present embodiment will be described.

FIG. 5 is an overall configuration diagram of the horizontal excavation of the multi-air hammer device. As shown in the figure, the multi-air hammer device includes a leading hammer body 10 for leading a casing 12.
And a propulsion device 38 for propelling the leading hammer body 10.

First, the configuration of the leading hammer 10 will be described. The leading hammer body 10 includes three air hammers 16A, 16B, and 16C as shown in FIGS. 6, 7, and 8. Each of the air hammers 16A to 16C is housed in a hammer case 18, and the hammer case 1
8 are arranged at substantially equal intervals on a concentric circle centered on the axis of 8.

The air hammers 16A to 16C are composed of hammer cylinders 20A to 20C formed in a cylindrical shape, and hammer pistons 22A to 22C which slide in the hammer cylinders 20A to 20C. Hammer cylinders 20A to 20C have bit chucks 24A to
24C, and the bits 26A to 26C are slidably supported by the bit chucks 24A to 24C.
The hammer pistons 22A to 22C are driven by air supplied from an air supply line described later to
It slides in 0A-20C. When the hammer pistons 22A to 22C slide, the bit 26
A to 26C are hammer pistons 22A to 22C.
Being hit.

As shown in FIG. 7, all of the bits 26A to 26C are formed in the same shape, and are formed to be circular as a whole. Also, each bit 26A
26C are provided with bit teeth 28A to 28C that protrude from the outer periphery and increase in diameter. Bit tooth 28A
To 28C are bits 26A to 26C as shown in FIG.
Are slidably provided in the guide grooves 30A to 30C formed at the distal end of the bit, and slide along the guide grooves 30A to 30C to protrude and retract from the outer periphery of the bits 26A to 26C.

Exhaust passages 34A to 34C are formed in each of the bits 26A to 26C.
The exhaust ports 34a to 34c of the 34C are guide grooves 30A to 30C.
C is formed. The air used for the operation of each of the air hammers 16A to 16C is exhausted from the exhaust ports 34a to 34c into the excavation hole 82 via the exhaust paths 34A to 34C.

Further, a sufficient number of metal chips 36, 36,... Made of cemented carbide are fixed to the end surfaces of the bits 26A to 26C and the enlarged bit teeth 28A to 28C, respectively. 36, ... and the ground is excavated.

Next, the configuration of the propulsion device 38 will be described. As shown in FIG. 5, a propulsion base 44 is horizontally installed in the starting shaft 42. A guide rail 46 is provided on the propulsion base 44, and the propulsion device 40 is slidably supported on the guide rail 46. A propulsion cylinder 48 is connected to the propulsion device 40. By driving the propulsion cylinder 48, the propulsion device 4 is driven.
0 slides on the guide rail 46.

As shown in FIG. 5, an earth discharging case 50 is connected to the propulsion device 40. The casing 12 is supported on the front surface of the earth discharging case 50, and the rod 1 is inserted therein. The tip of the rod 1 is connected to a case rod 60 formed on the leading hammer body 10. This case rod 60 has the same configuration as the rod 1. That is, three air supply pipes 66A, 66B, 66C and one water supply pipe (not shown) are provided around the main pipe 62, and the auger blade 64 is attached around the circumference. I have.

Further, the propulsion device 40 is provided with a rod rotation device 68 provided with a rotation angle detection device. The rod 1 is driven by the rod rotating device 68 to rotate or swing continuously or intermittently. When the rod 1 rotates or swings, the leading hammer body 10 is rotated.
Rotates or swings.

The propulsion device 40 is provided with an air swivel 70 having three independent flow paths. Air is supplied to the three air supply pipes 3A, 3B, 3C of the rod 1 from the air compressor 72 installed on the ground via the air swivel 70. Then, the air supplied to the air supply pipes 3A, 3B, 3C is supplied to the respective air hammers 16A to 16C via the air supply pipes 66A, 66B, 66C of the case rod 60, and the respective air hammers 16A to 16C are provided.
A to 16C are activated.

The amount of air supplied from the air compressor 72 to each of the air hammers 16A to 16C is controlled by valves 73A to 73C corresponding to the respective air hammers 16A to 16C.
It is adjusted by controlling the opening and closing of. By controlling the opening and closing of the valves 73A to 73C to control the amount of air supplied to each of the air hammers 16A to 16C, the striking force of each of the air hammers 16A to 16C is adjusted to operate or stop. . These valves 73A-7
Opening / closing of 3C is individually controlled by operation from operation panel 74 or manual opening / closing operation.

In FIG. 5, reference numeral 78 denotes an earth discharging device, and the excavated earth and sand collected in the earth discharging case 50 is discharged to the ground by the earth discharging device 78. Bits 26A-
Excavated earth and sand excavated at 26C is carried into the casing 12 by the exhaust air, and is conveyed to the earth discharging case 50 by the rod 1 rotating together with the exhaust air.

In FIG. 5, reference numeral 80 denotes a hydraulic unit for driving the propulsion cylinder 48 and the like, and reference numeral 81 denotes an entrance packer for injecting a lubricant and preventing air leakage.

In FIG. 5, reference numeral 76 denotes a laser theodolite, which is used for measuring the amount of deflection of the leading hammer 10. The method of measuring the amount of deviation of the leading hammer body 10 using the laser theodolite 76 is as follows.

The laser theodolite 76 irradiates a laser beam toward a target 63 provided on the case rod 60. This laser beam is irradiated in parallel with the plan line, and when the leading hammer body 10 is dug along the plan line,
The laser light is applied to the center of the target 63. Therefore, by measuring the amount of deviation of the laser beam irradiated on the target 63 with respect to the center of the target 63, the amount of deviation of the leading hammer body 10 with respect to the planning line can be measured. For example, when the laser beam is shifted above the center of the target 63, it indicates that the leading hammer body 10 is shifted below the plan line. This target 6
The display on 3 is transmitted by wire or wireless by a position sensor (not shown) installed in the main pipe 62, and the image is displayed on a monitor (not shown) on an operation panel 74 installed on the ground. The operator operates the operation panel 74 while viewing the screen of the monitor, and makes necessary corrections.

The operation of the multi-air hammer device using the rod 1 according to the present embodiment configured as described above is as follows.

First, the bits 26A to 26C provided at the tip of the leading hammer body 10 are brought into contact with the face. Then, the propulsion cylinder 48 of the propulsion device 40 is driven. Thereby, the leading hammer body 10 and the casing 12 are propelled.

At the same time as driving the propulsion cylinder 48, the rod rotating device 68 is driven to rotate the rod 1. Accordingly, the rotation of the rod 1 is transmitted to the leading hammer body 10, and the leading hammer body 10 rotates.

Further, at the same time when the rod rotating device 68 is driven, the compressor 72 is driven, and each of the valves 73A to 73A is driven.
Release 73C. Thereby, each air supply pipe 3 of the rod 1 is supplied from the compressor 72 through the air swivel 70.
Air is supplied to A, 3B and 3C. Then, this air is supplied to each of the air hammers 16A to 16C of the leading hammer body 10, and the air hammers 16A to 16C operate. That is, the hammer piston 2 of each of the air hammers 16A to 16C.
2A to 22C are activated and strike bits 26A to 26C. Thereby, the face face is repeatedly set to bits 26A to 26A.
C is hit and crushed. At this time, each bit 26A ~
Bit teeth 28A to 28C provided in 26C are expanded by contacting the face face, and as a result, a drill hole 82 having a diameter larger than the outer diameter of casing 12 is excavated.

The excavated earth and sand excavated by the bits 26A to 26C is discharged into the casing 12 from between the casing 12 and the hammer case 18 by the action of the exhaust air. Then, the excavated earth and sand discharged into the casing 12 is subjected to the auger blade 64 of the rod 1 rotating together with the exhaust air.
Is transported to the earth discharging case 50 and collected from the earth discharging case 50 to the earth discharging device 78.

As described above, normally, the ground is excavated by uniformly operating the air hammers 16A to 16C while rotating the leading hammer body 10 in one direction. On the other hand, when the leading hammer body 10 deviates from the plan line, excavation is performed as follows.

The deviation of the leading hammer body 10 from the planned line can be confirmed on a monitor on the operation panel 74. In this case, first, the excavation work is temporarily stopped, and the direction to be corrected is confirmed from the display on the monitor. Next, only the air hammer of the bit in the direction to be corrected is operated. At the same time, the rod rotating device 68 is driven to swing the leading hammer body 10 in a predetermined angle range. As a result, only the ground in the direction to be corrected is excavated.

When the ground in the direction to be corrected is excavated by a predetermined amount as described above, all the air hammers 16A to 16C
Operates uniformly, and the ground is hit with all the bits 26A to 26C. At the same time, the leading hammer body 10 is rotated in one direction by the rod rotating device 68. This allows
The entire face is hit by the bits 26A to 26C and excavated. And, in this way, all bits 26A-26
After operating C to excavate the ground by a predetermined amount, the ground is excavated by operating only the bit in the direction to be corrected again.

As described above, by repeatedly performing the excavation only in the direction to be corrected and the entire surface excavation, the excavation direction is corrected by gradually leading the leading hammer body 10 in the direction to be corrected.

As described above, according to the multi-air hammer device using the rod 1 of the present embodiment, the air hammer 16A
Since air can be individually supplied to the air hammers 16A to 16C, the air hammers 16A to 16C can be individually operated. Thus, the direction of excavation can be easily corrected, and excavation with high energy efficiency can be performed.

Further, since the auger blades 5 are attached to the rod 1, excavated earth and sand can be efficiently discharged regardless of the excavation distance.

In this embodiment, an example is described in which the present invention is applied to a multi-air hammer device having three air hammers 16A to 16C. However, the multi-air hammer device to which the rod of the present invention is applied is not limited to this. Not something.
For example, the present invention can be applied to a multi-air hammer device having four or two air hammers. In this case,
Increase or decrease the number of air supply pipes arranged around the main pipe according to the number of air hammers.

[0042]

As described above, according to the present invention,
Air can be individually supplied to each air hammer from a plurality of air supply pipes disposed around the main pipe. Thereby, each air hammer can be operated individually. Moreover, the excavated earth and sand can be efficiently discharged regardless of the excavation distance by the auger blade attached around the main pipe.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration of an embodiment of a rod according to the present invention.

FIG. 2 is a front view showing a configuration of an embodiment of a rod according to the present invention.

FIG. 3 is a side sectional view showing a configuration of an embodiment of a rod according to the present invention.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

FIG. 5 is an overall configuration diagram of an embodiment of a multi-air hammer device according to the present invention.

FIG. 6 is a side sectional view showing a configuration of a leading hammer body.

FIG. 7 is a front view of a leading hammer body.

FIG. 8 is a sectional view taken along line 8-8 of the leading hammer shown in FIG. 6;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rod, 2 ... Main pipe, 3A-3C ... Air supply pipe, 4 ...
Water pipe, 5 auger blade, 6a, 6b ... flange, 7 ...
Bolt holes, 8 positioning pins, 10 leading hammer, 1
2. Casing, 16A-16C ... Air hammer, 18 ...
Hammer case, 20A-20C ... Hammer cylinder, 2
2A to 22C: hammer piston, 26A to 26C: bit, 28A to 28C: bit tooth, 36: metal chip, 40: propulsion device, 42: starting shaft, 44: propulsion base, 48: propulsion cylinder, 50: unloading case, 60 ...
Case rod, 62 ... Main pipe, 63 ... Target, 64 ...
Auger blades, 66A-66C air supply pipe, 68 rod rotating device, 72 compressor, 73A-73C valve, 74 operation panel, 76 laser theodolite, 7
8: earth removal device, 80: hydraulic unit, 82: borehole

Claims (3)

[Claims] A rod connected to a multi-air hammer device having a plurality of air hammers to supply air to the multi-air hammer device and transmit rotation and propulsion; and a hollow main pipe; A rod comprising: a plurality of air supply pipes disposed around the main pipe to individually supply air to the air hammer; and connecting portions formed at both ends of the main pipe. 2. The rod according to claim 1, wherein a water pipe is provided around the main pipe. 3. The rod according to claim 1, wherein an auger blade is provided around the main pipe.