JP2022043473A - In-hole imaging device - Google Patents

Abstract

To provide an in-hole imaging device that can easily and continuously photograph a condition of the ground in a hole in an axial direction simply by pulling out a drilling rod.SOLUTION: An in-hole imaging device 1 that photographs an inside of a hole A drilled by a drilling rod 4 with a drilling bit 3 attached to a tip of a rod 2 includes a capsule body that communicates from a hole opening side of the drilling rod 4 to the tip and can be inserted into a hollow tube 5 opened at a tip of the drilling bit 3, and a fixing mechanism (guidance function 20) that fixes a capsule body 13 transported toward the tip of the drilling rod 4 by air flow or water flow to the tip of the drilling rod 4, and the capsule body 13 includes therein, a camera 12 that photographs the inside of the hole, a recorder 31 that records an image captured by the camera 12, and a battery 32 that supplies power to the camera 12 and the recorder 31.SELECTED DRAWING: Figure 1

Description

The present invention relates to an in-hole imaging device that photographs the inside of a bowling hole.

In order to grasp the geological condition in the hole by advanced boring, a camera is inserted in the hole and a video is taken to check the geology and spring points at each depth. The camera is inserted into the hole on the premise that the hole wall is self-supporting, and after the boring work is completed, the hole-retaining pipe and the drilling rod are all collected.

Therefore, when the self-supporting property of the hole wall is poor or when there is a lot of slime in the hole, it is difficult to take a picture due to the insertion of the camera into the hole itself or the deposit on the tip of the camera. In addition, when the hole wall collapsed during the observation inside the hole, it became difficult to collect the camera, and the camera was often abandoned. In addition, the hole wall often collapsed immediately after the rod was pulled out.

Therefore, the endoscope insertion part of the industrial endoscope device is sent from the hole opening side of the rod provided with the drilling bit at the tip through the drilling water supply path, and the tip is the drilling water of the drilling bit. A geological exploration method has been proposed in which the object is projected outward from the discharge hole and the state of the ground in front of the drilling bit is explored by the endoscope insertion portion (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-1330811

However, in the prior art, when continuously exploring the condition of the ground in the hole in the axial direction, it is necessary to pull out the rod with a traction device and pull out while synchronizing the endoscope insertion part. Will end up. Further, since the drilling rods are connected every predetermined length (for example, 3 m), it is necessary to rotate and remove the drilling rods when pulling out. Therefore, the cable connected to the endoscope insertion portion must also be connected at a predetermined length, and it is necessary to repeat disconnection and connection when pulling out.

The present invention has been made in view of the above problems, and it is possible to easily and continuously photograph the state of the ground in the hole in the axial direction simply by pulling out the drilling rod to solve the problem. The purpose is to provide an in-hole photographing device capable of performing.

The in-hole photographing device of the present invention is an in-hole photographing device that photographs the inside of a hole drilled by a drilling rod having an excavation bit attached to the tip of the rod, and is a tip from the hole opening side of the drilling rod. The drilling rod has a capsule body that can be inserted into a hollow tube that is open at the tip of the drilling bit and the capsule body that has been transported toward the tip of the drilling rod by air flow or water flow. The capsule body is provided with a fixing mechanism for fixing to the tip of the capsule, and the capsule body includes a camera for photographing the inside of a hole, a recorder for recording an image captured by the camera, and a power source for the camera and the recorder. It is characterized by having a built-in battery to supply.
Further, the in-hole photographing apparatus of the present invention includes a plurality of connected capsule bodies, and the camera, the recorder, and the battery may be dispersed and built in the plurality of capsule bodies.
Further, in the in-hole photographing apparatus of the present invention, the plurality of capsule bodies may be connected via a damper member.
Further, in the in-hole photographing apparatus of the present invention, as a guide mechanism for guiding the transportation of the capsule body, a guide member abutting on the inner peripheral surface of the hollow tube is attached, and the attached guide member is attached in the radial direction. The guide member is fitted into a peripheral groove formed on the inner peripheral surface of the tip of the drilling rod, and the cover member is urged on the inner peripheral surface of the hollow pipe. The guide mechanism may function as the fixing mechanism by abutting.
Further, in the in-hole photographing apparatus of the present invention, in a state where the capsule body is fixed to the tip of the drilling rod by the fixing mechanism, the fixing mechanism shields the air flow or the water flow that transports the capsule body. It may function as a shielding mechanism.

According to the present invention, the drilling rod can be pulled out with the in-hole photographing device equipped with the camera, the recorder and the battery fixed to the tip of the drilling rod, so that the drilling rod can be easily pulled out by simply pulling out the drilling rod. It has the effect of being able to continuously photograph the condition of the ground in the hole in the axial direction. In addition, you can shoot the entire line without worrying about the hole wall collapsing.

It is a figure which shows the structure of embodiment of the hole photographing apparatus which concerns on this invention. It is a figure which shows the structure at the time of transportation of the camera capsule shown in FIG. It is a figure which shows the structure at the time of positioning of the camera capsule shown in FIG. It is a figure which shows the structure of the guide mechanism shown in FIG. 2 and FIG. It is a figure which shows the configuration example which provided a plurality of guide mechanisms shown in FIGS. 2 and 3.

Next, an embodiment for carrying out the present invention (hereinafter, simply referred to as “embodiment”) will be specifically described with reference to the drawings.

As shown in FIG. 1A, the in-hole photographing apparatus 1 of the present embodiment has a drilling bit in the drilling rod 4 after boring drilling by a drilling rod 4 having a drilling bit 3 attached to the tip of the rod 2. It is inserted into a hollow tube 5 communicating to the tip of 3 and transported toward the tip of the drilling rod 4 by an air flow or a water flow toward the tip. In this embodiment, the direction of the hole is described as horizontal, but the direction of the hole is not particularly limited.

Then, as shown in FIG. 1B, the transported in-hole photographing apparatus 1 is positioned and fixed by the peripheral groove 51 formed on the inner peripheral surface of the tip end portion of the drilling rod 4. In this state, the in-hole imaging device 1 can photograph the in-hole A, and simply by extubating the drilling rod 4, the in-hole imaging device 1 continuously photographs the ground condition of the in-hole A in the axial direction. Can be done.

The hollow pipe 5 may communicate from the hole opening side of the drilling rod 4 to the tip thereof and may be opened at the tip of the excavation bit 3. For example, a drilling water may be supplied to the tip of the drilling bit 3. When the hole water supply pipe or the hole drilling rod 4 is a reverse circulation drill, an internal rod that discharges the hole drilling powder to the outside can be used. If the inner peripheral surface of the drilling rod 4 is not uneven, the hollow tube 5 itself may be used as a substitute. Further, in FIGS. 1 and 2, the diameter of the hollow tube 5 is set to the maximum diameter that can be accommodated in the rod 2 for the sake of explanation. Is unlimited.

Referring to FIG. 1, the hole shooting device 1 includes a lighting 11 for irradiating the hole A with light, a camera capsule 10 having a built-in camera 12 for shooting the hole A, and an image taken by the camera 12. It has a configuration in which a recording capsule 30a having a built-in recorder 31 for recording a video recording and a battery capsule 30b having a built-in battery 32 for supplying power to the lighting 11, the camera 12, and the recorder 31 are connected.

The camera capsule 10 and the recording capsule 30a are connected by a cable 40 for power supply and shooting data, and a damper member 50 such as a spring for avoiding a collision between the camera capsule 10 and the recording capsule 30a is provided. Has been done. Similarly, the recording capsule 30a and the battery capsule 30b are also connected by a power cable 40, and a damper member 50 such as a spring for avoiding a collision between the recording capsule 30a and the battery capsule 30b is provided. Has been done. Each configuration of the camera capsule 10, the camera 12, and the like is selected to have dimensions according to the shapes of the drilling rod 4 and the hollow tube 4.

In this way, by configuring the in-hole imaging device 1 by connecting a plurality of capsules, each capsule can be miniaturized, and even if the hollow tube 5 is bent in the middle, it is transported to the tip. Will be possible. If the diameter of the hollow tube 5 is large or if there is no bent portion, the camera capsule 10 may also incorporate the recorder 31 and the battery 32 so that one capsule can handle the problem.

The in-hole photographing apparatus 1 is inserted into the hollow tube 5 with the camera capsule 10 at the head. With reference to FIGS. 2 and 3, the camera capsule 10 abuts on the inner peripheral surface of the hollow tube 5 and the capsule body 13 in which the illumination 11 is attached to the tip of the camera capsule 10 and has the camera 12 built therein. It is equipped with a guidance mechanism 20 for guiding transportation.

The camera 12 is composed of a CCD camera or a CMOS camera that can capture the state of the hole A as a moving image or a still image. The camera 12 may be a borehole camera.

The capsule body 13 is a tubular body having a camera 12's photographing port formed at the tip thereof, and in the present embodiment, the capsule body 13 is formed in a cylindrical shape having a diameter smaller than the inner diameter of the hollow tube 5.

The guide mechanism 20 includes a pair of cover members 22 to which a guide member 21 composed of rollers that abut on the inner peripheral surface of the hollow tube 5 is attached. The cover member 22 is, for example, a member made of a resin such as rubber and having an outer peripheral surface having the same curvature as the inner peripheral surface of the hollow tube 5 and having an arcuate cross section.

The pair of cover members 22 are attached at axially symmetrical positions on the outer circumference of the capsule body 13 so as to be movable in the radial direction along the guide member 14 standing on the outer circumference of the capsule body 13. The pair of cover members 22 are connected by an urging member 23 such as a spring that urges the pair of cover members 22 in a direction away from the cover member 22.

The guide member 21 is attached so that the contact portion with the inner peripheral surface of the hollow tube 5 projects from the outer peripheral surface of the cover member 22. Therefore, when the camera capsule 10 shown in FIG. 2 is transported, the guide member 21 is urged toward the inner peripheral surface of the hollow tube 5, and is between the inner peripheral surface of the hollow tube 5 and the outer peripheral surface of the cover member 22. Is in a state where a gap X is formed. This gap X serves as an escape route for the air flow or water flow that transports the in-hole photographing device 1.

Further, the recording capsule 30a and the battery capsule 30b also include a capsule body 33 in which the recorder 31 and the battery 32 are built, respectively, and are composed of rollers that abut on the inner peripheral surface of the hollow tube 5 on the peripheral surface of the capsule body 33. The guide member 34 is attached. As a result, the gap between the inner peripheral surface of the hollow tube 5 and the capsule body 33 also becomes an escape route for the air flow or water flow that transports the in-hole photographing apparatus 1. Therefore, the in-hole photographing apparatus 1 to which the camera capsule 10, the recording capsule 30a, and the battery capsule 30b are connected is transported at an appropriate speed on an air stream or a water stream.

As shown in FIG. 3, the camera capsule 10 is positioned with the guide member 21 fitted in the peripheral groove 51. The peripheral groove 51 is formed at a depth equal to or greater than the protrusion length from the outer peripheral surface of the cover member 22 of the guide member 21. Therefore, in the positioning state in which the guide member 21 is fitted in the peripheral groove 51, the outer peripheral surface of the cover member 22 is urged and abuts on the inner peripheral surface of the hollow tube 5, so that the guide mechanism 20 functions as a fixing mechanism. The camera capsule 10 is fixed to the tip of the drilling rod 4, and the gap X that serves as an escape route for air flow or water flow disappears.

Further, although omitted in FIGS. 2 and 3, referring to FIG. 4, there is an air flow or an air flow between the peripheral surface of the capsule body 13 and the cover member 22 and the connection portion of the pair of cover members 22. A sheet member 15 that blocks the water flow is provided. At the time of transportation, as shown in FIG. 4A, the sheet member 15 is in a folded state. Then, in the positioning state, as shown in FIGS. 4 (b) to 4 (d), the sheet member 15 is hung between the peripheral surface of the capsule body 13 and the cover member 22 and the connection portion of the pair of cover members 22. Passed to block air or water flow.

That is, in the positioning state in which the guide member 21 is fitted in the peripheral groove 51, the guide mechanism 20 functions as an air flow or a water flow shielding mechanism, and the air flow or the water flow does not escape toward the tip of the excavation bit 3. As a result, the propulsive force due to the air flow or the water flow is lost, and the recording capsule 30a and the battery capsule 30b following the camera capsule 10 are also safely stopped (without collision).

When the camera capsule 10 is in the positioning state, the air pressure or the water pressure on the hole opening side of the drilling rod 4 increases. Therefore, it is advisable to detect an increase in air pressure or water pressure, stop the pumping to the air flow or water flow, or limit the air pressure or water pressure so that it does not increase above a predetermined value.

The camera 12 may insert the in-hole photographing device 1 into the hollow tube 5 in a state where imaging is started, but a sensor (for example, a cover) for detecting that the guide member 21 is fitted in the peripheral groove 51 may be inserted. A sensor) for detecting the distance of the member 22 from the capsule body 13 may be provided to start shooting in the positioned state.

Further, when taking a picture with the extubation work of the drilling rod 4, the camera capsule 10 fixed to the tip of the drilling rod 4 also rotates, but an image processing and a gyro meter for detecting the rotation angle are used. By providing it, the orientation of the image can be corrected.

Further, the peripheral groove 51 is formed so as to have a gentler inclination on the rear end side than on the front end side. As a result, the guide member 21 can be pulled out of the peripheral groove 51 by an air flow or a water flow in the opposite direction, and the in-hole photographing apparatus 1 can be easily recovered.

As shown in FIG. 5, the guide mechanism 20 may be provided on the peripheral surface of the capsule body 13 by changing the angle around the axis. In this case, the transportation of the camera capsule 10 is stable, and the air flow or the water flow can be blocked more reliably in the positioning state. The same number of peripheral grooves 51 as the guide mechanism 20 will be formed at the tip of the hollow tube 5, but the peripheral groove 51 located on the tip side of the hollow tube 5 will have the preceding guide mechanism 20. It is preferable to form the slope on the tip side gently so that it can easily pass through.

As described above, the present embodiment is an in-hole imaging device 1 for photographing the inside A formed by the drilling rod 4 having the drilling bit 3 attached to the tip of the rod 2, and the drilling rod. The capsule body, which communicates from the hole opening side of 4 to the tip and can be inserted into the hollow tube 5 opened at the tip of the excavation bit 3, and is transported toward the tip of the drilling rod 4 by an air flow or a water flow. The capsule body 13 is provided with a fixing mechanism (guidance function 20) for fixing the capsule body 13 to the tip of the drilling rod 4, and the capsule body 13 has a camera 12 for photographing the inside of the hole and an image captured by the camera 12. A recorder 31 for recording and a battery 32 for supplying power to the camera 12 and the recorder 31 are built-in.
With this configuration, the drilling rod 4 can be pulled out with the in-hole photographing device 1 provided with the camera 12, the recorder 31 and the battery 32 fixed to the tip of the drilling rod 4, so that the drilling rod 4 is pulled out. It is possible to easily and continuously photograph the condition of the ground in the hole in the axial direction. Further, since the electric wire connected to the in-hole photographing device 1 from the hole opening side of the drilling rod 4 is not required, the drilling rod 4 can be smoothly pulled out.

Further, in the present embodiment, a plurality of connected capsule bodies 13 and 33 are provided, and the camera 12, the recorder 31 and the battery 32 are dispersed and built in the plurality of capsule bodies 13 and 33.
With this configuration, the capsule bodies 13 and 33 can be miniaturized, and even if the hollow tube 5 is bent in the middle, it can be transported to the tip.

Further, in the present embodiment, the plurality of capsule bodies 13, 33 are connected via a damper member.
With this configuration, it is possible to avoid damage due to collision of the plurality of capsule bodies 13, 33.

Further, in the present embodiment, as a guide mechanism 20 for guiding the transportation of the capsule body 13, a guide member 21 that abuts on the inner peripheral surface of the hollow tube 5 is attached, and the attached guide member 21 is attached in the radial direction. The cover member 22 is provided to be urged, the guide member 21 is fitted into the peripheral groove 51 formed on the inner peripheral surface of the tip of the drilling rod 4, and the cover member 22 is urged to the inner peripheral surface of the hollow pipe 5. Upon contact, the guide mechanism 20 functions as a fixing mechanism.
With this configuration, the guide mechanism 20 can also be used as a fixing mechanism.

Further, in the present embodiment, in a state where the capsule body 13 is fixed to the tip of the drilling rod 4 by the fixing mechanism, the fixing mechanism functions as a shielding mechanism for shielding the air flow or the water flow that transports the capsule body 13.
With this configuration, transportation by air flow or water flow can be stopped.

The present invention has been described above based on the embodiments. It is understood by those skilled in the art that this embodiment is an example, and that various modifications are possible in the combination of each of these components, and that such modifications are also within the scope of the present invention.

1 In-hole imaging device 2 Rod 3 Drilling bit 4 Drilling rod 5 Hollow tube 10 Camera capsule 11 Lighting 12 Camera 13 Capsule body 14 Guide member 20 Guide mechanism 21 Guide member 22 Cover member 23 Bounce member 30a Recording capsule 30b Battery capsule 31 Recorder 32 Battery 33 Capsule body 34 Guide member 40 Cable 50 Damper member 51 Circumferential groove

Claims (5)

An in-hole imaging device that photographs the inside of a hole drilled by a drilling rod with a drilling bit attached to the tip of the rod.
A capsule body that communicates from the hole opening side of the drilling rod to the tip and can be inserted into a hollow tube opened at the tip of the excavation bit.
A fixing mechanism for fixing the capsule body transported toward the tip of the drilling rod by an air flow or a water flow to the tip of the drilling rod is provided.
The capsule body is characterized by having a built-in camera for taking a picture of the inside of the hole, a recorder for recording an image taken by the camera, and a battery for supplying power to the camera and the recorder. In-hole imaging device. The capsule body is provided with a plurality of connected capsule bodies, and the capsule body is provided.
The in-hole photographing apparatus according to claim 1, wherein the camera, the recorder, and the battery are dispersed and built in the plurality of capsule bodies. The in-hole photographing apparatus according to claim 2, wherein the plurality of capsule bodies are connected via a damper member. As a guide mechanism for guiding the transportation of the capsule body, a guide member abutting on the inner peripheral surface of the hollow tube is attached, and a cover member for urging the attached guide member in the radial direction is provided.
The guide member fits into a peripheral groove formed on the inner peripheral surface of the tip of the drilling rod, and the cover member is urged and abuts on the inner peripheral surface of the hollow pipe to cause the guide mechanism to come into contact with the inner peripheral surface. The in-hole photographing apparatus according to any one of claims 1 to 3, wherein the device functions as the fixing mechanism. A claim characterized in that, in a state where the capsule body is fixed to the tip end portion of the drilling rod by the fixing mechanism, the fixing mechanism functions as a shielding mechanism for shielding an air flow or a water flow for transporting the capsule body. Item 4. The in-hole photographing apparatus according to any one of Items 1 to 4.

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