JP4758881B2 - Boring drilling device tip position detection system and drilling tube - Google Patents

Description

  The present invention relates to a tip position detection system that drills while detecting a tip position of a drilling tube of a boring drilling device, and a drilling tube.

  In oblique boring and horizontal boring, there is often a case where a load is not uniformly applied to the tip of the rod. Therefore, a technique for constantly measuring the position of the tip is necessary to perform highly accurate drilling.

  Conventionally, as a system for detecting the position of the tip of the boring, (1) intermittently inserting a measuring instrument into a boring rod (drilling pipe) and measuring (2) in the head part of the drilling pipe There were two types of installations of measuring instruments.

  There are two types of drilled pipes of (1): a measuring instrument comprising an inclinometer and an azimuth meter is inserted into a boring rod, and a measuring instrument comprising a gyro sensor. These measuring instruments are inserted into the drilled pipe from the ground boring machine side through the drilled holes.

  The types of drilled pipes in (2) include a mud pulse system (using pressure fluctuations of drilling fluid in the drilled pipe), a hard wire system (electric wire), and an electromagnetic field (EM (Electro-Magnetic)) system. is there.

  The mud pulse method is a method in which a measurement signal from a measuring instrument installed at the tip of a rod is converted into a pressure change of excavating mud and transmitted, and the pressure change is measured by a pressure sensor at the top of the rod. According to this method, since the muddy water in the excavation hole is used as the transmission medium, measurement up to a large depth is possible.

  On the other hand, the hard wire system is a system in which a measurement signal of a measuring instrument installed at the tip of a rod is transmitted to the ground side using an electric wire arranged in a drilled tube. According to this method, the power required for the measuring instrument can be sent from the ground through the electric wire, and there is an advantage that the power supply speed is very fast in addition to the necessity of the in-pipe power source.

  In the electromagnetic field method, an electromagnetic coil is installed inside the rod tip to generate an electromagnetic field, and the strength of the electromagnetic field is measured on the ground to measure the position of the rod tip. In this method, information can be transmitted between the transmitting antenna in the pipe and the receiving antenna on the ground, so that the measurement contents are simple and the workability is high.

In addition, there existed what was shown to patent document 1. FIG. This boring drilling device is provided with a measuring device for measuring the position and inclination of the boring head and a transmitter for transmitting measurement data measured by the measuring device. The receiver is provided with the position information received by the receiver.
Japanese Patent Laid-Open No. 10-30392

  However, in the case of measuring by intermittently inserting the measuring instrument into the boring rod (drilling pipe) of (1) described above, it is necessary to stop the drilling operation and insert the measuring instrument. There was a problem that would become longer. Furthermore, there has been a problem that it takes time to feed back the results to the drilling staff during data processing.

  Also, in (2) drilling pipe mud pulse method. A pressure conversion device or the like is necessary, and the current technology has a problem that the device becomes very large and costly.

  Furthermore, the hard wire method requires a problem that workability is deteriorated by connecting the cable in the drilling tube, and it is necessary to consider to always prevent the cable from rotating with respect to the rotation of the drilling tube, and the structure is complicated. There was a problem of becoming.

  Also, in the electromagnetic field method, the intensity of the electromagnetic field generated at the tip of the rod is measured on the ground, but since the transmission distance of the electromagnetic field is as short as several meters, the ground receiving antenna must be placed directly above the rod. When there is an obstacle such as a building on the ground, there is a problem that measurement cannot be performed.

  Further, also in the boring drilling device described in Patent Document 1, the transmitter provided in the boring head has a short signal transmission distance of several meters. Since it is necessary to arrange it directly above, there is a problem that measurement cannot be performed when there is an obstacle on the ground.

  Accordingly, the present invention has been devised to solve the above-described problem, and has a simple structure and can detect the tip position of a drilling tube without being affected by an obstacle on the ground. It is an object of the present invention to provide an apparatus tip position detection system and a drilled tube.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a tip position detection system for detecting a tip position of a drilling tube of a boring drilling device, and detects a tip position of the drilled tube in the drilling tube. And a wireless signal generator for converting position data measured by the position measuring device into a wireless signal, and a coil is formed by winding a conducting wire around a part of the body of the drilled tube. A tip of a boring hole drilling device, wherein the coil is configured to transmit a radio signal converted by the radio signal generator by the coil, and a receiving device for receiving the radio signal is provided on the ground. It is a position detection system.

  According to such a configuration, the number of turns and the winding diameter of the conductive wire of the coil can be increased, and the transmission distance of the radio signal converted by the radio signal generator can be greatly increased. Therefore, even if the tip portion of the boring hole drilling device is drilling the lower part of an obstacle such as a building, the position (the tip position of the hole drilling tube) can be detected. Thereby, the operation of the boring hole drilling device can be controlled based on the tip position of the hole drilling tube, and high-precision hole drilling can be performed. Further, unlike the hard wire system, it is not necessary to connect a cable in the drilling pipe, so that workability is not deteriorated, and it is not necessary to provide a mechanism for preventing the cable from being rotated, thereby preventing the structure from being complicated. In addition, unlike the conventional mud pulse method, it is not necessary to provide a pressure conversion device, so that the boring drilling device can be prevented from becoming enormous and costly. Furthermore, in such a boring drilling device, the tip position can be detected without stopping the drilling operation. In addition, if the receiving device is connected to a control device that controls the operation of the boring drilling device, the operation of the boring drilling device can be controlled immediately according to the position of the tip portion, and when data processing, It takes no time to feed back the results to the hole manager. Therefore, the entire construction time can be shortened and efficient drilling can be performed.

  According to a second aspect of the present invention, in the boring hole drilling device according to the first aspect, the conductive wire is wound around a cylindrical member provided in a part of a body portion of the hole drilling tube. It is a tip position detection system.

  According to such a configuration, since the conducting wire is wound around a tubular member separate from the drilled tube, if the tubular member is made to have a length equivalent to that of the coil, the winding operation of the conducting wire can be easily performed. The coil portion can be easily transported.

  The invention according to claim 3 is characterized in that the position measuring device and the wireless signal generating device are accommodated in a container separable from the drilled tube and configured to be recoverable. A tip position detection system for a boring hole drilling device according to claim 1 or 2.

  According to such a configuration, the position measuring device and the radio signal generating device can be easily collected after the drilling is completed, and these devices can be reused, and cost reduction can be achieved. it can. In addition, it is useful for ground improvement to install only a drilled tube having a hollow inside in the ground.

  The invention according to claim 4 is the tip position detection system for a boring hole drilling device according to claim 3, wherein the container is constituted by a pressure vessel.

  According to such a configuration, even when the drilled tube is bent excessively, the container is not deformed, so that the position measuring device and the radio signal generating device can be prevented from being damaged.

  According to a fifth aspect of the present invention, in the boring according to any one of the first to fourth aspects, the position measuring device is fixed to the drilled tube via an impact absorbing material. It is a tip position detection system of a hole drilling device.

  According to such a configuration, the position measuring device can detect the position without being affected by vibration during drilling, and can perform highly accurate position detection and drilling.

  According to a sixth aspect of the present invention, the position measuring device is fixed to a shaft member that can rotate relative to the drill tube, and the shaft member holds the vertical direction of the position measuring device constant. A tip position detection system for a boring hole drilling device according to any one of claims 1 to 5, wherein a weight member is provided.

  According to such a configuration, since the vertical direction of the position measuring device is kept constant, the tilt angle and the rotation angle can be easily detected accurately, and highly accurate position detection and drilling can be performed. it can.

The invention according to claim 7 is a drilling tube having a cylindrical barrel portion that is pushed into a drilling hole by a boring machine of a boring drilling device, wherein a lead wire is connected to a cylindrical member provided in a part of the barrel portion. Is a drilling tube having a cylindrical body that is pushed into a drilling hole by a boring machine of a coil boring drilling device for wireless signal transmission, and the tip of the drilling tube is inserted into the drilling tube A position measuring device for detecting a position; and a wireless signal generating device for converting position data measured by the position measuring device into a wireless signal. A wire is wound around a cylindrical member provided in a part of the body portion. A boring drilling device comprising: a coil for radio signal transmission for transmitting the radio signal; and the position measuring device and the radio signal generating device are configured to be recoverable from the drilling tube. Is a perforated tube

According to the hole drilling tube having such a configuration, a coil having a large number of windings and a winding diameter of a conducting wire can be formed, so that the transmission distance of a radio signal can be greatly increased. Therefore, even if the tip portion of the boring drilling device is drilling under an obstacle such as a building, the position (tip position of the drilling tube) can be detected, and high-precision drilling is performed. be able to. Further, by collecting the position measuring device and the radio signal generating device from the inside of the drilling tube, only the drilling tube having a hollow inside can be laid in the ground, which is useful for improving the ground. Needless to say, these expensive devices can be reused.

  According to the present invention, the boring hole drilling device can have a simple structure, and the excellent effect that the tip position of the hole drilling tube can be detected without being affected by a ground obstacle is exhibited.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is an overall cross-sectional view showing the best mode for carrying out a tip position detection system and a drilling tube of a boring drilling device according to the present invention, and FIG. 2 shows a tip of the boring drilling device according to the present invention. FIG. 3 is a cross-sectional view showing the best mode for carrying out the position detection system and the drilling pipe, and FIG. 3 is a partial view showing the tip position detection system and the coil of the drilling pipe according to the present invention. FIG. 4 is a sectional side view showing a tip position detection system for a boring drilling device and a radio signal generator for a drilling tube, and a coil connection state according to the present invention, and FIG. 5 is a collecting knob and a collecting jig. It is sectional drawing which showed the tool.

  First, the configuration of the tip position detection system and the drilling pipe of the boring drilling apparatus according to the present embodiment will be described.

  As shown in FIG. 1, a boring drilling device 1 that performs oblique boring and horizontal boring is a device that pushes a drilling tube 10 from behind with a boring machine 2 installed on the ground and propels it into the ground. . A drilling head 11 is provided at the tip of the drilling tube 10. The tip of the drilling head 11 is formed to be inclined in a taper shape. When straight drilling, the drilling pipe 10 and the drilling head 11 are rotated while rotating, and when drilling curved, the drilling pipe 10 In addition, the hole is pushed with the earth pressure acting on the inclined portion of the hole drilling head 11 by press-fitting the hole drilling head 11 in a non-rotating state. A position measuring device 30 that detects the tip position of the hole drilling tube 10 (the position of the hole drilling head 11) is provided inside the hole drilling tube 10. In addition, a radio signal generator 50 that converts position data measured by the position measuring device 30 into a radio signal is provided in the drill tube 10 so as to be electrically connected to the position measuring device 30. As shown in FIG. 2, the position measuring device 30 and the radio signal generating device 50 are accommodated in a container (pressure vessel 15) described later.

  As shown in FIG. 2, a coil 70 for transmitting a radio signal converted by the radio signal generator 50 to the ground is formed in a part of the body portion 12 of the drilled tube 10. The coil 70 is composed of a conductive wire 72 wound around a cylindrical member 71 provided in a part of the body portion 12 of the drilled tube 10. In addition, in this Embodiment, although comprised so that the conducting wire 72 may be wound around the cylindrical member 71, you may wind a conducting wire directly around the trunk | drum of a drilling pipe. A receiving device 90 for receiving a radio signal transmitted from the coil 70 is provided on the ground.

  The position measuring device 30 includes a tilt angle meter and an azimuth meter (both not shown), and can measure the tilt angle and the azimuth angle of the drilling head 11 in real time. Both the clinometer and the azimuth meter are electrically connected to the processing means (electronic board 51) of the radio signal generator 50. Both the tilt angle meter and the azimuth meter are accommodated in the housing 31 and integrated.

  The housing 31 for accommodating the clinometer and the azimuth meter is housed in a container separable from the drilling tube 10 together with the radio signal generator 50, and is configured to be recoverable after the drilling is completed. Yes. The container separable from the drilling tube 10 is constituted by a pressure-resistant container 15. The pressure vessel 15 is formed in a cylindrical shape that is arranged at a predetermined interval from the inner peripheral surface of the hole drilling tube 10, and is disposed concentrically with the hole drilling tube 10 in the hole drilling tube 10. A front shaft member 13 that extends forward in the drilling direction is provided at the front portion of the pressure vessel 15, and a rear shaft member 14 that extends rearward in the drilling direction is provided at the rear portion of the pressure vessel 15. . The front shaft member 13 and the rear shaft member 14 are fixed to the shaft core portion inside the hole drilling tube 10 by a leaf spring type fixing member (centrizer) 16, and the pressure vessel 15 is always the shaft core portion of the hole drilling tube 10. It is comprised so that it may be located in. Specifically, the fixing member 16 is fixed to the front shaft member 13 and the rear shaft member 14, and is pressed against the inner peripheral surface of the drilled tube 10 when the spring member is biased radially outward. Yes. Thereby, the fixing member 16 is configured to fix the pressure vessel 15 to the drilling tube 10 so as not to rotate, and the pressure vessel 15 is configured to rotate together with the drilling tube 10. Furthermore, the fixing member 16 is configured to fix the pressure vessel 15 to the hole drilling tube 10 by pressing the inner peripheral surface of the hole drilling tube 10 with a predetermined biasing force (biasing force due to water pressure). When the pressure vessel 15 is pulled out from the bore tube 10 after the drilling is completed, the water pressure is removed, and the pressure vessel 15 is pulled with a force that overcomes the frictional resistance of each contact point between the bore tube 10 and the fixing member 16. Thus, the pressure resistant container 15 is recovered along the inner peripheral surface of the hole drilling tube 10. A drilling head 11 is integrally fixed to the front portion of the front shaft member 13.

  The housing 31 is rotatably supported inside the pressure vessel 15. Specifically, a front shaft member 32 extending forward in the drilling direction is provided at the front portion of the housing 31, and a rear shaft member 33 extending rearward in the drilling direction is provided at the rear portion of the housing 31. Is provided. The front shaft member 32 and the rear shaft member 33 are rotatably supported via bearings 34 and 34, respectively. That is, the position measuring device 30 is fixed to the shaft members (the front shaft member 32 and the rear shaft member 33) that can rotate relative to the drill tube 10.

  A weight member 35 is provided on a part of the outer peripheral surface of the front shaft member 32 in the circumferential direction so that the portion to which the weight member 35 is attached is always on the lower side even when the drilling tube 10 rotates. Further, the front shaft member 32 rotates relative to the bearing 34. As a result, the vertical direction of the position measuring device 30 is held constant. That is, the weight member 35 has a function of preventing the position measuring device 30 from rotating.

  In the present embodiment, the weight member 35 is also provided on a part of the outer peripheral surface of the rear shaft member 33 in the circumferential direction. The weight member 35 provided on the rear shaft member 33 is also attached at the same circumferential position as the weight member 35 provided on the front shaft member 32. Thereby, the anti-rotation function of the position measuring device 30 is enhanced.

  A shock absorber 36, which is a shock absorbing material, is provided at the attachment portion of the front shaft member 32 at the front portion of the housing 31. That is, the front shaft member 32 is attached to the front portion of the housing 31 via the shock absorber 36. A shock absorber 36 that is a shock absorbing material is also provided at a mounting portion of the rear shaft member 33 at the rear portion of the housing 31. That is, the rear shaft member 33 is attached to the rear portion of the housing 31 via the shock absorber 36. The shock absorber 36 is constituted by a laminated rubber formed by laminating plate materials formed of an elastic member such as rubber, and is arranged so that the plate materials are laminated in the axial direction of the drilling tube 10.

  A slip ring 37 for transmitting electric power and signals to a rotating object is provided behind the rear shaft member 33. Behind the slip ring 37, a potentiometer 38, which is a part of the components of the position measuring device 30 and detects a rotation angle, is provided. The potentiometer 38 is fixed inside the pressure vessel 15 so as to rotate together with the pressure vessel 15, and the pressure vessel 15 and the drilled tube 10 rotate together. Therefore, the potentiometer 38 is a rotation angle meter that measures the rotation angle of the drilling tube 10.

  At the rear part of the potentiometer 38, an electronic board 51 and a battery 52 constituting the wireless signal generator 50 are provided. The battery 52 is connected to the electronic board 51. The electronic board 51 is electrically connected to a potentiometer 38 that is a part of the position measuring device 30, and an inclination angle meter and an azimuth meter that are the position measuring device 30 in the housing 31 through the slip ring 37. Electrically connected. The electronic board 51 is configured to convert the position data measured by the position measuring device 30 into a radio signal and transmit it to the coil 70, and the position data can be transmitted at all times. Further, the electronic board 51 includes a storage unit (not shown), and is configured to be able to save the position data measured by the position measuring device 30 and to always read it. The electronic board 51 is provided with a wiring 54 extending to a connection terminal 53 connected to the coil 70.

  The coil 70 is for transmitting the radio signal converted by the radio signal generator 50 to the ground receiver 90 (see FIG. 1). As shown in FIGS. Is configured as part of The coil 70 is constituted by a conducting wire 72 wound around a cylindrical member 71 provided in a part of the body portion 12 of the drilled tube 10. The cylindrical member 71 is provided at a connecting portion between the drilled tubes 10 and 10 and constitutes a part of the body portion 12 of the drilled tube 10. The cylindrical member 71 has a diameter substantially equal to that of the drilled tube 10 and is formed in a cylindrical shape having an axial length necessary for the coil 70. On the outer peripheral surface of the cylindrical member 71, a concave section 73 having a rectangular cross section with a predetermined depth is formed in an annular shape along the circumferential direction, and constitutes a casing of an antenna for transmitting signals. A conducting wire 72 is wound around the recess 73 of the tubular member 71. A protective coating layer 74 is formed on the surface of the wound conductive wire 72. The protective coating layer 74 is formed so as to cover the entire conductor 72 with, for example, hard epoxy, and has durability against friction with the drilled surface ground. The surface of the protective coating layer 74 is configured to be flush with the surface of the flange portions 77 (see FIG. 3 (maximum diameter portion of the tubular member 71)) on both axial sides of the recess 73 of the tubular member 71. ing. That is, the upper portion 77 is formed on the front and rear of the protective coating layer 74 in the direction of drilling (both sides in the axial direction). As a result, when drilling, as seen in the drilling direction (the axial direction of the drilling tube 10), the upper portion 77 pushes away the surface earth and sand of the drilling hole, and wear of the protective coating layer 74 can be reduced. . Thus, by winding the conducting wire 72 around the cylindrical member 71 which is separate from the drilling tube 10 and shorter than the drilling tube 10, the winding work of the conducting wire 72 can be easily performed. Transport and carry-in can be performed easily.

  As shown in FIG. 4, a key groove 75 in which the connection terminal 53 provided in the pressure resistant container 15 is attached is formed at the rear end portion of the inner peripheral surface of the cylindrical member 71. The key groove 75 is formed in a rectangular cross section and is formed so as to open inward and backward. A connection terminal is detachably inserted into the key groove 75 from the rear. A wiring 76 extending to the conducting wire 72 of the recess 73 is connected to the connection portion of the key groove 75.

  As shown in FIG. 5, a recovery knob 17 is formed at the rear end of the rear shaft member 14 at the rear of the pressure vessel 15 to which the recovery jig 20 is locked during recovery after the drilling operation is completed. Yes. The recovery knob 17 is formed in a triangular pyramid shape that is reduced in diameter toward the rear, and the pressure vessel 15 can be pulled backward by locking the bottom portion of the triangular pyramid with the recovery jig 20. It has become.

  As shown in FIG. 1, the receiving device 90 is disposed in the vicinity of the boring machine 2 and is connected to a control device 91 that controls the operation of the boring machine 2. The control device 91 adjusts the propulsion speed and rotation angle of the drilling tube 10 based on the position data (tilt angle, azimuth angle, and rotation angle) of the drilling head 11 received by the receiving device 90. Yes.

  Next, the tip position detection system of the boring drilling device 1 having the above-described configuration, the drilling work process of the drilled tube 10, and the operation thereof will be described.

  When drilling using such a boring drilling device 1, a drilling tube 10 provided with a drilling head 11 at the tip is set in the boring machine 2, and the drilling tube 10 is pushed into the ground from behind. The drilling head 11 pushes away the ground soil and the drilling pipe 10 is pushed forward.

  At this time, the position measuring device 30 (tilt angle meter, azimuth meter, and rotation angle meter (potentiometer 38)) measures the tilt angle, azimuth angle, and rotation angle of the drilling head 11 at the tip of the drill tube 10. Here, since the tilt angle meter and the azimuth meter are rotatably supported by the bearing 34 and are accommodated in the housing 31 in which the vertical direction is held constant by the weight member 35, the rotation of the drilling tube 10 is performed. The tilt angle and the azimuth angle can be accurately measured without being affected by. Moreover, since the potentiometer 38 is being fixed to the pressure | voltage resistant container 15 rotated with the drilling pipe 10, the rotation angle of the drilling pipe 10 can be measured correctly.

  Further, when the drilling tube 10 is propelled, the coil 70 moves in the drilling hole. However, since the protective coating layer 74 is formed around the conducting wire 72, the conducting wire 72 is not damaged. Further, since the flange portion 77 of the cylindrical member 71 is positioned before and after the protective coating layer 74 in the drilling direction, the upper portion 77 is the surface of the drilling hole when viewed in the drilling direction when drilling. It will serve as a weir to push away the earth and sand, and wear of the protective coating layer 74 can be reduced.

  Further, since the housing 31 that accommodates the tilt angle meter and the azimuth meter is fixed to the drilling tube 10 via the shock absorber 36, vibration during drilling is absorbed by the shock absorber 36 and the tilt angle meter and the azimuth meter. It is not transmitted to the angle meter. Therefore, the tilt angle meter and the azimuth meter can accurately detect the position without being affected by vibration during excavation, and can detect the position with high accuracy.

  Further, since the housing 31 is connected to the radio signal generator 50 via the slip ring 37, the measured tilt angle and azimuth angle position data is transmitted with the drill tube 10; Even when the housing 31 that accommodates the tilt angle meter and the azimuth meter rotates relative to each other, the position data can be transmitted to the electronic board 51 without twisting the wiring (not shown) or the like. Since the potentiometer 38 and the radio signal generator 50 are both rotated, the measured rotational angle position data is directly transmitted to the electronic board 51 through normal wiring (not shown).

  The position data transmitted to the electronic board 51 is converted into a radio signal and transmitted to the coil 70 via the wiring 54 and the connection terminal 53 in real time. The electronic board 51 is configured so that the position data measured by the position measuring device 30 can be stored and can be read at all times, so that it can be printed out later, which is convenient for document creation.

  Here, since the coil 70 is formed by winding the conducting wire 72 around the cylindrical member 71 having substantially the same diameter as the body portion 12 of the hole drilling tube 10, it is provided inside the hole drilling tube as in the prior art. Compared with the coil, the number of windings and the winding diameter of the conducting wire 72 can be increased, and the transmission distance of the radio signal converted by the radio signal generator 50 can be greatly increased. As a result, even when the tip of the boring hole drilling device 1 is drilling the lower part of an obstacle such as a building, the receiving device 90 in the vicinity of the boring machine 2 can receive a radio signal of position data. . Then, the position data radio signal received by the receiving device 90 is transmitted to the control device 91. If such a coil 70 is used, the detected position of the tip of the drilling tube 10 can be constantly transmitted to the control device 91 that controls the operation of the boring machine 2. Therefore, the control device 91 controls the operation of the boring machine 2 by adjusting the propulsion speed and the rotation angle of the drilling tube 10 based on accurate position data (tilt angle, azimuth angle, and rotation angle) in real time. Can be drilled with high accuracy.

  Further, since the battery 52 is provided in the pressure vessel 15, it is not necessary to connect a power supply or data transmission cable in the drilling pipe as in the conventional hard wire system, so that the workability of drilling is deteriorated. There is nothing. In addition, since it is not necessary to provide a mechanism for preventing the cable from being routed, the structure can be prevented from becoming complicated. Further, since it is not necessary to provide a pressure conversion device as in the conventional mud pulse method, it is possible to prevent the boring drilling device from becoming enormous and costly.

  And in this boring drilling apparatus 1, the front-end | tip position of the drilling pipe | tube 10 is detectable, without stopping drilling operation | work. Further, since the receiving device 90 is directly connected to the control device 91, the operation of the boring drilling device can be immediately controlled according to the position of the tip portion of the drilling tube 10, and data processing is performed as in the conventional case. It takes no time to feed back the results to the drilling staff. Therefore, the entire construction time can be greatly shortened, and efficient drilling can be performed.

  After the drilling operation is completed, a recovery device (not shown) including a recovery jig 20 is inserted from the rear of the hole drilling tube 10, and the recovery jig 20 is attached to the recovery knob at the rear end of the rear shaft member 14. 17 is connected to the pressure vessel 15. Then, the pressure vessel 15 is pulled to the boring machine 2 side by the collecting device, and the position measuring device 30 and the radio signal generating device 50 are collected together with the pressure vessel 15. At this time, the fixing member 16 that fixes the pressure vessel 15 to the hole drilling tube 10 is pressed and elastically fixed to the inner peripheral surface of the hole drilling tube 10 by a predetermined urging force such as water pressure. The pressure member 15 is pulled by a pulling force that overcomes the frictional resistance of each contact point between the drilling tube 10 and the fixing member 16 by removing the water pressure, and the fixing member 16 slides on the inner peripheral surface of the drilling tube 10. The pressure vessel 15 is pulled out from the drilling tube 10 and collected. Further, the connection terminal 53 protruding from the pressure vessel 15 is extracted rearward from the opening at the rear end of the key groove 75. A drilling head 11 is fixed to the tip of the pressure vessel 15, and the drilling head 11 is also collected at the same time. In this way, the position measuring device 30 and the radio signal generating device 50 can be easily recovered, and the devices 30 and 50 can be reused, and the cost can be reduced. In particular, since the position measuring device 30 and the radio signal generating device 50 are accommodated in the pressure vessel 15, the pressure vessel 15 is not deformed even when the drilling tube 10 is bent excessively during drilling. Therefore, it is possible to prevent the position measurement device 30 and the radio signal generation device 50 from being damaged, and the devices 30 and 50 can be reliably reused. In addition, after the collection of the pressure vessel 15, only the drilled tube 10 whose tip is released and the inside is hollow can be laid in the ground, which is very useful for ground improvement.

  FIG. 6 is a cross-sectional view showing another best embodiment for carrying out a tip position detection system and a drilling pipe of a boring drilling apparatus according to the present invention.

  In the present embodiment, the container for housing the position measuring device 30 and the like is composed of two pressure-resistant containers 25a and 25b. A front shaft member 13 is provided in front of the front pressure vessel 25a, and a rear shaft member 14 is provided behind the rear pressure vessel 25b. The front pressure vessel 25a and the rear pressure vessel 25b are arranged at a predetermined interval, and the front pressure vessel 25a and the rear pressure vessel 25b are connected via an intermediate shaft member 18. The front shaft member 13, the rear shaft member 14, and the intermediate shaft member 18 are each fixed to the drilled tube 10 via a fixing member 16.

  In the front pressure vessel 25a, an inclination angle meter, an azimuth angle meter, a housing 31 for accommodating these, and a slip ring 37 are accommodated. A front shaft member 32 and a rear shaft member 33 are provided before and after the housing 31 via shock absorbers 36, as in the embodiment shown in FIG. The front shaft member 32 and the rear shaft member 33 are rotatably supported via bearings 34 and 34, respectively. Weight members 35 are respectively provided on the outer peripheral surfaces of the front shaft member 32 and the rear shaft member 33, and the vertical direction of the position measuring device 30 (tilt angle meter and azimuth meter) is held constant. A slip ring 37 is provided at the rear part of the rear shaft member 33, and wiring between the housing 31 and the pressure-resistant container 25a that rotate relative to each other is made possible.

  A potentiometer 38 which is a part of the components of the position measuring device 30 is provided in the rear pressure vessel 25b. At the rear part of the potentiometer 38, an electronic board 51 and a battery 52 constituting the wireless signal generator 50 are provided. The electronic board 51 is provided with a wiring 54 extending to a connection terminal 53 connected to the coil 70.

  In addition, since it is the same as that of the boring apparatus 1 shown in FIG. 2 about another structure, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to the configuration as described above, the same effects as the embodiment shown in FIGS. 1 to 5 can be obtained, and the pressure-resistant containers 25a and 25b are divided and reduced in size. It is easy to recover and even holes with a small radius of curvature can be easily recovered.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in the above-described embodiment, the position measuring device 30 is configured by an inclination angle meter, an azimuth angle meter, and a rotation angle meter, but is not limited thereto. For example, a gyro may be used. In this case, the same effect as that of the above embodiment can be obtained.

It is the whole sectional view showing the best embodiment for carrying out the tip position detection system and drilling pipe of the boring drilling device concerning the present invention. [BRIEF DESCRIPTION OF THE DRAWINGS] It is sectional drawing which showed the best embodiment for implementing the front-end | tip position detection system and drilling pipe | tube of a boring drilling apparatus based on this invention. It is a partially broken side view showing a tip position detection system of a boring drilling device and a coil of a drilling tube according to the present invention. It is sectional drawing which showed the connection state of the front-end | tip position detection system of the boring drilling apparatus which concerns on this invention, the radio | wireless signal generator of a drilling pipe, and a coil. It is sectional drawing which showed the collection knob and the collection jig | tool. It is sectional drawing which showed other embodiment of the best for implementing the front-end | tip position detection system of a boring drilling apparatus which concerns on this invention, and a drilling pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Boring drilling apparatus 2 Boring machine 10 Drilling pipe 12 Body 15 Pressure-resistant container 16 Fixed member 25a Pressure-resistant container 25b Pressure-resistant container 30 Position measuring apparatus 32 Front shaft member (shaft member)
33 Rear shaft member (shaft member)
35 Weight member 36 Shock absorber (Shock absorber)
50 Radio Signal Generator 70 Coil 71 Tubular Member 72 Conductor

Claims (7)

In the tip position detection system that detects the tip position of the drilling tube of the boring drilling device,
In the drilling tube, a position measuring device for detecting the tip position of the drilling tube is provided, and a radio signal generator for converting position data measured by the position measuring device into a radio signal is provided,
A coil is formed by winding a conducting wire around a part of the body of the hole drilling tube, and the coil is configured to transmit a radio signal converted by the radio signal generator,
A receiving device for receiving the radio signal is provided on the ground. A tip position detection system for a boring hole drilling device. The tip position detection system for a boring drilling device according to claim 1, wherein the conducting wire is wound around a cylindrical member provided in a part of a body portion of the drilling tube. The said position measuring device and the said radio | wireless signal generator are accommodated in the container separable from the said drilling pipe, and are comprised so that collection | recovery is possible. The Claim 1 or Claim 2 characterized by the above-mentioned. Borehole drilling device tip position detection system. The tip position detection system for a boring hole drilling device according to claim 3, wherein the container is configured by a pressure resistant container. The tip position detection system for a boring hole drilling device according to any one of claims 1 to 4, wherein the position measuring device is fixed to the hole drilling tube via an impact absorbing material. . The position measuring device is fixed to a shaft member that can rotate relative to the drilling tube,
The boring hole according to any one of claims 1 to 5, wherein the shaft member is provided with a weight member for keeping the vertical direction of the position measuring device constant. Device tip position detection system. A drilling tube having a cylindrical body that is pushed into a drilling hole by a boring machine of a boring drilling device,
In the hole drilling tube, a position measuring device that detects the tip position of the hole drilling tube, and a radio signal generator that converts position data measured by the position measuring device into a radio signal,
A coil for wireless signal transmission for transmitting the wireless signal by winding a conductive wire around a cylindrical member provided in a part of the body part,
A drilling tube for a boring drilling device, wherein the position measuring device and the wireless signal generator are configured to be recoverable from the drilling tube.

Images