JP2015013394A - Cutting device, sample collection system, and sample collection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unfailingly collect a sample from a cut object and inhibit cost increase of a cutting device.SOLUTION: A cutting device 20 is used for collecting a columnar sample 102 from a cut object 100 and includes: a housing 31; a rotation shaft 32 which is rotatably supported by the housing 31, the rotation shaft 32 where a first through hole 38 is formed along its center axis; a cutting bit 50 which is attached to the rotation shaft 32 at a base part 51 and has a cylindrical bit part 52 extending from the base part 51 into a cylindrical shape, the cutting bit 50 where a second through hole 44, in which one end communicates with the first through hole 38 and the other end communicates with the cylindrical bit part 52, is formed at the base part 51; and a driving source 33 which is disposed offset from the center axis of the rotation shaft 32 to the lateral side and rotationally drives the rotation shaft 32. A hollow tube 61 may be inserted into the first through hole 38 and the second through hole 44.

Description

  The present invention relates to a cutting device, a sampling system, and a sampling method used to collect a cylindrical sample.

In order to investigate mineral resources buried in the ground and hydrocarbon-based resources such as natural gas, a sample core may be collected from the bedrock and rock mass, and a cylindrical sample may be further collected from this sample core. .
To collect a sample like this, a cylindrical cutting bit is attached to the tip of the cutting device, and the cutting bit is pressed against a sample core collected from a rock mass or rock block while rotating around the central axis, and this sample core is cut. It is done by doing.
In addition, the same processing may be performed on an artificial object such as concrete in order to measure a composition distribution such as alkalinity.

  By the way, when cutting with a cutting blade such as the above-described cutting bit, the cooling action of the cutting blade that rises in temperature due to the friction with the cutting object, the lubricating action that reduces the friction with the cutting object, and the cutting object is cut. In order to obtain the action of discharging the chips generated by the above, it is widely performed to supply water or oil between the cutting blade and the object to be cut.

  Patent Document 1 discloses a configuration in which liquefied gas is supplied to the tip of a drill bit through a hollow drill bit in order to obtain a higher cooling effect.

  Further, in Patent Document 2, a tool having a bit at the tip and a rotating shaft are provided in a cylindrical shape, and liquid nitrogen or dry ice is passed through the rotating shaft or a compressed gas is adiabatically expanded. And the structure which cools a motor is disclosed.

JP 7-237214 A JP 2002-51586 A (paragraph 0063)

By the way, when water and oil are used to collect a cylindrical sample for analysis with a cylindrical cutting bit from a cutting target such as a sample core cut out from a rock mass or a rock mass, the cutting target is sandstone or the like. If it is fragile, water or oil may permeate into the object to be cut, and the object to be cut may be destroyed during cutting, and the sample may not be collected.
Further, when water or oil penetrates into the object to be cut, there is a problem that depending on the sample, components contained in the sample are dissolved by water or oil, and the internal composition changes. For example, when investigating the composition distribution of concrete, there is a possibility that the composition of the surface and the cut part may change due to the dissolution of alkali by water.

On the other hand, the problems as described above can be avoided by using liquefied gas, liquid nitrogen, dry ice or the like as in Patent Documents 1 and 2.
However, if a cryogenic medium such as liquefied gas, liquid nitrogen, or dry ice is passed through a drill bit, tool, or rotating shaft, the drill bit or the bearing that rotatably supports the rotating shaft will freeze and be damaged. It can also be considered. Therefore, these components must be able to withstand extremely low temperatures, resulting in an increase in device cost.
An object of the present invention made there is to provide a cutting device, a sampling system, and a sampling method capable of reliably collecting a sample from a cutting object and suppressing an increase in cost of the cutting device.

The present invention employs the following means in order to solve the above problems.
That is, the present invention is a cutting device for collecting a columnar sample from a cutting object, a housing, a rotation shaft rotatably supported by the housing, a base is mounted on the rotation shaft, A cutting bit having a cylindrical bit portion extending in a cylindrical shape from the base portion, a drive source for rotationally driving the rotary shaft, the rotary shaft and the base portion of the cutting bit penetrating from above the cutting device A through-hole communicating to the inside of the cylindrical bit portion, and a hollow tube can be inserted into the through-hole.
According to this cutting apparatus, it is possible to form a cylindrical cut in the cutting object by cutting the cutting object while rotating the cutting bit by rotationally driving the rotation shaft by the drive source. A hollow tube can be inserted through the penetration portion. When a supply source of a liquefied refrigerant such as liquefied nitrogen or liquefied argon is connected to the hollow tube body and the liquefied refrigerant is supplied from the supply source, the liquefied refrigerant can be sent into the cutting bit. With this liquefied refrigerant, the object to be cut is cooled in the cutting bit and frozen and solidified. Further, the liquefied refrigerant performs lubrication between the cutting bit and the cutting object, discharge of chips generated by cutting the cutting object, and cooling of the cutting bit.
In addition, the hollow tube through which the liquefied refrigerant passes is inserted into the penetrating portion, so that the rotating shaft does not come into direct contact with the liquefied refrigerant to be cooled, and the temperature of components such as bearings around the rotating shaft is reduced. Can be suppressed. Thereby, an increase in apparatus cost can be suppressed without using an expensive part capable of supporting extremely low temperatures for a bearing or the like.

In the present invention, a ring-shaped tube support member formed of a material having a lower thermal conductivity than the rotating shaft may be provided on the inner peripheral surface of the penetrating portion.
Thereby, heat transfer from the liquefied refrigerant passing through the tube to the rotating shaft can be further suppressed while the tube is supported in the penetrating portion.

In the present invention, the tubular body may be supported by the tubular body supporting member so as to be movable relative to the rotational shaft in the central axis direction of the rotational shaft.
Thereby, it can cut by making a housing, a rotating shaft, and a cutting bit approach a cutting subject, with a pipe connected to a supply source of liquefied refrigerant being fixed.

In the present invention, the tubular body may be arranged such that a distal end portion projects from the base portion into the cylindrical bit portion.
Thereby, it can suppress that the rotating shaft side is cooled with a liquefied refrigerant through the base of a cutting bit.

The present invention is a sample collection system for collecting a cylindrical sample from a cutting object, a housing provided so as to be relatively movable in a direction approaching and separating from the cutting object, and the housing is rotatable. A rotating shaft supported by the base, a cutting portion having a cylindrical bit portion that is attached to a tip portion of the rotating shaft and extending in a cylindrical shape from the base portion, a drive source that rotationally drives the rotating shaft, and the cutting A refrigerant supply pipe for feeding a liquefied refrigerant supplied from an external liquefied refrigerant supply source into the cylindrical bit portion of the bit is provided.
According to this sample collection system, it is possible to form a cylindrical cut in the cutting object by cutting the cutting object while rotating the cutting bit by rotating the rotation shaft by the drive source. By supplying the liquefied refrigerant to the refrigerant supply pipe from the liquefied refrigerant supply source into the cylindrical bit portion of the cutting bit, the object to be cut is cooled and solidified in the cutting bit. Further, the liquefied refrigerant performs lubrication between the cutting bit and the cutting object, discharge of chips generated by cutting the cutting object, and cooling of the cutting bit.
Further, by feeding the liquefied refrigerant through the refrigerant supply pipe, the rotating shaft does not come into direct contact with the liquefied refrigerant and is not cooled, and the temperature drop of components such as a bearing around the rotating shaft can be suppressed.

In the present invention, a liquefied refrigerant guide portion that hangs the liquefied refrigerant on the inner peripheral wall surface of the cylindrical bit portion may be formed at the tip of the refrigerant supply pipe.
Thereby, a liquefied refrigerant can be flowed along the inner peripheral surface of a cylindrical bit part.

Moreover, in this invention, you may make it the said front-end | tip part of the said refrigerant | coolant supply pipe | tube being curved or bent toward the inner peripheral wall of the said cylindrical bit part as said liquefied refrigerant guide part. .
Thereby, a liquefied refrigerant can be flowed along the inner peripheral surface of a cylindrical bit part.

In the present invention, a plate-shaped guide member orthogonal to the central axis of the cylindrical bit portion may be provided as the liquefied refrigerant guide portion so as to face the tip portion of the refrigerant supply pipe. Good.
This also allows the liquefied refrigerant to flow along the inner peripheral surface of the bit portion.

The present invention is a sampling method using the above-described sampling system, the step of rotating the cutting bit together with the rotating shaft by the drive source, and bringing the housing close to the cutting object, and the refrigerant Feeding the liquefied refrigerant from the supply pipe into the cylindrical bit portion and cutting the cutting object with the cutting bit while freezing and solidifying at least a part of the cutting object. .
According to this sample collection method, the object to be cut is cooled and frozen and solidified in the cutting bit, so that the sample can be reliably collected while preventing the object to be cut from collapsing.

  According to the present invention, it is possible to reliably collect a sample from an object to be cut and suppress an increase in cost of the cutting apparatus.

It is an elevation sectional view showing the composition of the sample collection system concerning this embodiment. FIG. 2 is a vertical sectional view showing a state in which a cutting object is being cut by the sampling system shown in FIG. 1. FIG. 2 is an elevational sectional view showing a state in which cutting of a cutting object is completed by the sampling system shown in FIG. 1. It is an elevation sectional view showing other examples of the sampling system concerning this embodiment. It is an elevational sectional view showing still another example of the sample collection system according to the present embodiment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a cutting device, a sampling system, and a sampling method according to the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited only to this embodiment.
FIG. 1 is an elevational sectional view showing the configuration of the sampling system according to the present embodiment. FIG. 2 is an elevational sectional view showing a state in which a cutting object is being cut by the sampling system shown in FIG. FIG. 3 is an elevational sectional view showing a state in which the cutting of the object to be cut has been completed by the sampling system shown in FIG.
As shown in FIG. 1, the sampling system 10 includes a cutting device 20 and a liquefied refrigerant supply device 60 that supplies a liquefied refrigerant such as liquid nitrogen to the cutting device 20.

The cutting device 20 includes a base 21 and a cutting device main body 30.
The base 21 can mount the cutting object 100 on the upper surface thereof. A plate-like stage 23 is disposed above the base 21 in parallel with the upper surface 21 a of the base 21. The stage 23 is provided so as to be movable along a guide column 24 that extends orthogonally upward from the base 21. The stage 23 is moved along the guide column 24 by a stage drive mechanism (not shown), and can be moved up and down in a direction approaching and separating from the base 21.

  The cutting device main body 30 includes a housing 31 supported by the stage 23, a rotary shaft 32 that is rotatably supported by the housing 31, and a cutting bit 50 is detachably attached to a distal end portion thereof, and rotationally drives the rotary shaft 32. And a motor (drive source) 33.

  The housing 31 has a cylindrical shape that continues along the central axis C extending in the vertical direction. On the outer peripheral surface of the intermediate portion in the vertical direction of the housing 31, a flange portion 31 f that protrudes to the outer peripheral side is formed. The housing 31 is inserted into a through-hole 23h formed in the stage 23, provided with a flange portion 31f abutting against the upper surface 23a of the stage 23, and a lower end portion 31c projecting downward from the stage 23. The stage 23 and the housing 31 are fixed by connecting means including bolts.

In addition, outer rings 37 a and 37 a of annular bearings 37 and 37 are fitted into the upper and lower portions of the inner peripheral surface of the housing 31. Between the upper and lower bearings 37, 37, a cylindrical spacer 34S is provided. By the spacer 34S, the distance between the upper and lower bearings 37 is kept constant.
Further, an upper cap 35 and a lower cap 36 having through holes 35 h and 36 h formed in the center are attached to the upper opening 31 a and the lower opening 31 b of the housing 31. Since the upper cap 35 and the lower cap 36 abut against the upper and lower bearings 37, 37, the positions of the bearings 37, 37 in the vertical direction are fixed.

The rotating shaft 32 is continuous along the central axis C extending in the vertical direction, and is supported by the inner rings 37b and 37b of the bearings 37 and 37 in the housing 31 so as to be rotatable around the central axis C of the housing 31. Has been. The rotating shaft 32 has a length such that the lower end portion protrudes below the housing 31 through the through hole 36 h of the lower cap 36.
The upper cap 35 and the rotary shaft 32 are formed with tube insertion holes 38A and 38B extending in the vertical direction at the center thereof. A refrigerant supply tube 61 described later is inserted through the tube insertion holes 38A and 38B. The tube insertion holes 38A and 38B are provided with cylindrical pipe guides (tube support members) 39 made of a material having a lower coefficient of friction and heat transfer than the rotating shaft 32, such as nylon resin, as necessary. .

As described above, the following drive mechanism is not particularly limited as long as the tube insertion holes 38A and 38B are formed continuously in the rotation shaft 32 and the rotation shaft 32 is rotated.
For example, a driven pulley 40 is provided at a portion of the rotating shaft 32 that protrudes downward from the housing 31.
The motor 33 that rotationally drives the rotary shaft 32 is offset on the stage 23 in a direction perpendicular to the central axis C of the rotary shaft 32 and is fixed at a position adjacent to the housing 31. A drive shaft 33 s of the motor 33 protrudes below the stage 23 through a through hole 23 i formed in the stage 23. The drive shaft 33s is provided with a disk-like drive pulley 41.
A drive belt 42 is stretched between the driven pulley 40 of the rotating shaft 32 and the drive pulley 41 of the motor 33. In such a drive mechanism including the motor 33, the drive pulley 41, the driven pulley 40, and the drive belt 42, when the motor 33 is operated, the rotation of the drive shaft 33s of the motor 33 causes the drive pulley 41, the drive belt 42, and the driven pulley 40 to rotate. The rotation shaft 32 is transmitted to the rotation shaft 32, and the rotation shaft 32 is rotationally driven around the central axis C.
As described above, the structure in which the tube is inserted into the rotation shaft 32 can be easily realized by providing the power source for driving the rotation shaft 32 by being offset from the center axis of the rotation shaft 32 to the side.

  Further, a bit mounting portion 45 for mounting the cutting bit 50 is provided at the lower end portion (tip portion) of the rotating shaft 32. The bit mounting portion 45 can be formed by a chuck having a shape corresponding to a predetermined standard or a screw portion. The bit mounting portion 45 is formed with a mounting recess 45 a for mounting the head (base) 51 of the cutting bit 50. A lower end portion of the tube insertion hole 38B of the rotating shaft 32 is opened in the mounting recess 45a.

The cutting bit 50 includes a head portion 51 having a chuck and a screw portion that fits into the mounting recess 45a, and a cylindrical bit portion 52 that extends from the head portion 51 in a cylindrical shape.
Here, the head 51 is formed so that its outer shape fits into a mounting recess 45a having a chuck and a screw portion. The cylindrical bit portion 52 includes a disc-shaped plate portion 52a formed integrally with the lower end portion of the head portion 51, and a cylindrical peripheral wall portion extending from the outer peripheral portion of the plate portion 52a to the side opposite to the head portion 51. 52b and a cutting blade part 52c formed continuously in the circumferential direction at the tip of the peripheral wall part 52b. The plate part 52 a and the peripheral wall part 52 b are formed so that the outer diameters thereof are larger than those of the head part 51 and the rotating shaft 32.
Further, the bit side tube is disposed on the head 51 of the cutting bit 50 so that one end is continuous with the tube insertion hole 38B and the other end faces the cylindrical bit portion 52 in a state where the cutting bit 50 is mounted in the mounting recess 45a. An insertion hole 44 is formed.

  Thus, the cutting device main body 30 has tube insertion holes 38A and 38B formed through the upper cap 35 and the rotating shaft 32, and a bit side tube insertion hole 44 formed in the head 51 of the cutting bit 50. Thus, a tube insertion part (penetration part) 46 penetrating in the vertical direction is formed.

The liquefied refrigerant supply device 60 includes a refrigerant supply tube (hollow tube, refrigerant supply pipe) 61 inserted into the tube insertion portion 46, a liquefied refrigerant supply source 62 that stores the liquefied refrigerant, a liquefied refrigerant supply source 62, and a refrigerant. A connection pipe 63 that connects the supply tube 61 and an open / close valve 64 provided in the connection pipe 63 are provided. The refrigerant supply tube 61 is made of a steel tube having a predetermined length in the vertical direction, for example, having a circular cross section. The refrigerant supply tube 61 penetrates through the tube insertion portion 46, and its distal end portion 61 b is inside the cylindrical bit portion 52 of the cutting bit 50. The upper end portion 61 a is provided so as to protrude above the rotation shaft 32.
Here, the refrigerant supply tube 61 is relatively movable in the vertical direction by the pipe guides 39 and 39 provided vertically in the tube insertion holes 38A and 38B, and is relatively rotatable around the central axis C. It is supported by. The refrigerant supply tube 61 is fixedly provided on the base 21 via a stay (not shown) or the like. That is, even if the housing 31, the rotating shaft 32, and the motor 33 of the cutting apparatus main body 30 are moved up and down and rotated together with the stage 23, the refrigerant supply tube 61 is fixed without being moved up and down integrally with them. For this reason, the refrigerant supply tube 61 is configured to allow the relative movement in the vertical direction and the relative rotation of the rotating shaft 32 by the lifting and lowering of the rotating shaft 32 by the pipe guide 39.

The refrigerant supply tube 61 is connected to a liquefied refrigerant supply source 62 such as a cylinder or a tank that stores the liquefied refrigerant through a connecting pipe 63 connected to the upper end portion 61a. In the present embodiment, the liquefied refrigerant supply source 62 stores liquefied nitrogen or liquefied argon as the liquefied refrigerant.
The connection pipe 63 is provided with an open / close valve 64 so that the supply of the liquefied refrigerant from the liquefied refrigerant supply source 62 can be interrupted.

Next, a sample cutting method from the cutting object 100 in the sample collection system 10 having the above-described configuration will be described.
In order to cut out a sample from the cutting object 100 in the sample collection system 10, first, the cutting object 100 and the base plate 110 are set on the base 21 with a fixed holding means (not shown). At this time, the stage 23 is raised and the cutting bit 50 is retracted above the cutting position of the cutting object 100. For example, the refrigerant supply tube 61 is fixed in a state in which the distal end portion 61 b is close to the cutting object 100.

Next, by operating the motor 33, the cutting bit 50 is rotated around the central axis C together with the rotating shaft 32.
Further, the open / close valve 64 is opened, and the liquefied refrigerant is jetted from the tip portion 61 b of the refrigerant supply tube 61 to the inside of the cylindrical bit portion 52 of the cutting bit 50 from the liquefied refrigerant supply source 62 through the connection pipe 63. The liquefied refrigerant may be ejected after the cutting blade 52c is brought close to the cutting object 100.
Then, the stage 23 is lowered, and the cutting object 100 is cut by the cutting blade portion 52 c of the cutting bit 50. At this time, the cutting device main body 30 and the motor 33 are lowered together with the stage 23, whereas the refrigerant supply tube 61 is not lowered.

As shown in FIG. 2, a cylindrical cut 101 is formed in the cutting object 100 by lowering the cutting blade 52c while rotating it.
At this time, the cutting object 100 inside the cutting bit 50 is cooled by the liquefied refrigerant ejected into the cutting bit 50. By using cryogenic liquefied nitrogen as the liquefied refrigerant, the cutting object 100 is frozen and solidified during cutting. The overflowing liquefied refrigerant and chips are prevented from scattering to the surroundings by the oil pan-like guide means 111 and sucked up by vacuum from the discharge port 112.
In addition, although liquid nitrogen is normally used from a cost and temperature, liquefied refrigerant | coolant does not prevent using liquid argon or helium depending on a use.

As shown in FIG. 3, when the cutting blade 52 c comes into contact with the upper surface of the cutting object 100 and descends by a predetermined dimension, the stage 23 is raised, and the cutting blade 52 c of the cutting bit 50 is removed from the cut 101. Pull out.
Then, the operation of the motor 33 is stopped, and the rotation of the rotating shaft 32 and the cutting bit 50 is stopped. At the same time, the opening / closing valve 64 is closed to stop the ejection of the liquefied refrigerant into the cutting bit 50.

  Thereafter, in the cutting object 100, a columnar sample 102 can be collected by extracting a portion below the cut line 101 formed in a cylindrical shape.

  As described above, by supplying a liquefied refrigerant to the inside of the cutting bit 50, the cutting object 100 is frozen and solidified, and the cutting object 100 collapses during cutting, or a highly water-soluble one contained in the cutting object 100. Dissolution can be prevented, and the columnar sample 102 can be reliably collected.

Further, the motor 33 for rotating the rotary shaft 32 is arranged not on the same axis as the rotary shaft 32 but on the side of the rotary shaft 32, so that the tube insertion holes 38A and 38B and the bit side are arranged. A tube insertion portion 46 including a tube insertion hole 44 is formed, and the refrigerant supply tube 61 can be inserted therethrough. Since the liquefied refrigerant passes through the stainless steel refrigerant supply tube 61, the rotating shaft 32 and the bearing 37 are not directly cooled, and they can be prevented from freezing. Thereby, damage to the cutting device main body 30 can be prevented, the reliability of the cutting device main body 30 can be improved, freezing of the bearing 37 can be suppressed, and an increase in the component cost of the bearing 37 can be suppressed.
In addition, the refrigerant supply tube 61 is supported by the housing 31 via a pipe guide 39 made of a material having a heat transfer coefficient lower than that of the rotating shaft 32. For this reason, it is difficult for the heat of the liquefied refrigerant in the refrigerant supply tube 61 to be transmitted to the housing 31 side, and also in this respect, freezing of the rotating shaft 32 and the bearing 37 can be reliably prevented.

  Further, the liquefied refrigerant also provides a cooling action for the cutting bit 50, a lubrication action between the cutting bit 50 and the object to be cut, and a chip discharging action.

(Other embodiments)
The cutting device, the sampling system, and the sampling method of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various modifications can be considered within the technical scope.
For example, the liquefied refrigerant is jetted into the cutting bit 50 from the tip 61b of the refrigerant supply tube 61, but the tip 61b is used as a liquefied refrigerant guide 80 as a peripheral wall of the cutting bit 50 as shown in FIG. You may curve or bend | fold toward the inner peripheral surface of the part 52b. As a result, the liquefied refrigerant is ejected from the tip end portion 61 b of the refrigerant supply tube 61 toward the peripheral wall portion 52 b of the bit 50.
Then, the liquefied refrigerant flows downward along the peripheral wall portion 52b while being hung on the entire circumference of the peripheral wall portion 52b of the rotating cutting bit 50, and the cutting bit 50 is cooled more efficiently and the liquefied refrigerant cools the object to be cut. It can be frozen and solidified from the outer peripheral side of 100 cuts 101. Therefore, the outer peripheral portion of the sample 102 collected from the cutting object 100 can be reliably and efficiently cooled.

  Further, as shown in FIG. 5, the liquefied refrigerant flows so that the liquefied refrigerant flows toward the peripheral wall portion 52 b of the cutting bit 50, with the tip portion 61 b of the refrigerant supply tube 61 facing downward, and vertically below the tip portion 61 b. As the guide portion 80, a plate-shaped guide member 70 orthogonal to the central axis C of the coolant supply tube 61 and the cutting bit 50 may be provided. Also by this, the liquefied refrigerant ejected from the tip end portion 61b of the refrigerant supply tube 61 flows downward along the peripheral wall portion 52b while being hung on the entire periphery of the peripheral wall portion 52b of the rotating cutting bit 50. Even in such a configuration, the outer peripheral portion of the sample 102 collected from the cutting object 100 can be reliably and efficiently cooled.

  In addition to this, for example, the liquefied refrigerant guide portion 80 having an appropriate configuration, such as branching the tip portion of the refrigerant supply tube 61 into a plurality or forming a plurality of openings and directing them to the peripheral wall portion 52b of the cutting bit 50, The liquefied refrigerant may be guided toward the peripheral wall portion 52b of the cutting bit 50.

In the above embodiment, the rotation shaft 32 is rotated only in one direction by the motor 33. However, the rotation direction of the rotation shaft 32 and the cutting bit 50 is switched between one direction and the other direction by the control of the motor 33. It may be.
In addition, the rotation of the motor 33 is transmitted to the rotary shaft 32 via the driven pulley 40, the drive pulley 41, and the drive belt 42. However, the rotation is not limited to this, and is transmitted via a gear (gear) or the like. May be.

Further, the refrigerant supply tube 61 is supported so as to be relatively movable in the vertical direction with respect to the rotating shaft 32 and the cutting bit 50. For example, the connection pipe 63 is formed of a flexible material. In this case, the refrigerant supply tube 61 can be fixedly provided with respect to the rotating shaft 32 and the cutting bit 50, and can be moved integrally therewith.
The refrigerant supply tube 61 may be separated from the liquefied refrigerant supply device 60 and included in the cutting device 20.

Furthermore, a series of operations of the sample collection system 10 described in the above embodiment may be performed by an operator manually operating the sample collection system 10 or may be performed in advance by a control unit (not shown) of the sample collection system 10. You may make it implement automatically based on the memorize | stored computer program.
In addition, in the above embodiment, the sample collection system 10 collects the columnar sample 102 using the rock mass set on the base 21 as the cutting object 100, but the rock forming the ground is cut. As the object 100, a cylindrical sample 102 may be collected by the cutting device 20.
Further, the type of the cutting object 100 is not limited at all.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

DESCRIPTION OF SYMBOLS 10 Sampling system 20 Cutting device 31 Housing 32 Rotating shaft 33 Motor (drive source)
39 Pipe guide (tube support member)
46 Tube insertion part (penetration part)
50 Cutting bit 51 Head (base)
52 Cylindrical Bit 61 Refrigerant Supply Tube (Hollow Tube, Refrigerant Supply Tube)
70 Guide member 80 Liquefied refrigerant guide 100 Cutting object

Claims (9)

A cutting device for collecting a cylindrical sample from a cutting object,
A housing;
A rotating shaft rotatably supported by the housing;
A cutting bit having a cylindrical bit portion attached to the rotating shaft and extending in a cylindrical shape from the base;
A drive source for rotationally driving the rotary shaft;
A penetrating portion that penetrates the rotating shaft and the base of the cutting bit and communicates from an upper portion of the cutting device to the inside of the cylindrical bit portion; and
With
A cutting device characterized in that a hollow tubular body can be inserted into the penetrating portion. The cutting apparatus according to claim 1, wherein a ring-shaped tube support member made of a material having a lower thermal conductivity than the rotating shaft is provided on an inner peripheral surface of the penetrating portion.   The cutting apparatus according to claim 2, wherein the tubular body is supported by the tubular body support member so as to be relatively movable with respect to the rotation shaft in a central axis direction of the rotation shaft.   The cutting device according to claim 2 or 3, wherein the tubular body is disposed such that a tip portion projects from the base portion into the cylindrical bit portion. A sampling system for collecting a cylindrical sample from a cutting object,
A housing provided so as to be relatively movable in a direction approaching and separating from the cutting object;
A rotating shaft rotatably supported by the housing;
A cutting bit having a cylindrical bit portion attached to the distal end portion of the rotating shaft and extending in a cylindrical shape from the base portion;
A drive source for rotationally driving the rotary shaft;
A refrigerant supply pipe for feeding a liquefied refrigerant supplied from an external liquefied refrigerant supply source into the cylindrical bit portion of the cutting bit;
A sampling system comprising:   6. The sampling system according to claim 5, wherein a liquefied refrigerant guide portion for suspending the liquefied refrigerant on an inner peripheral wall surface of the cylindrical bit portion is formed at a distal end portion of the refrigerant supply pipe.   The sample according to claim 6, wherein the leading end portion of the refrigerant supply pipe is provided as the liquefied refrigerant guide portion by being bent or bent toward an inner peripheral wall of the cylindrical bit portion. Collection system.   The plate-shaped guide member orthogonal to the central axis of the said cylindrical bit part is provided as the said liquefied refrigerant guide part facing the said front-end | tip part of the said refrigerant | coolant supply pipe | tube, The Claim 6 characterized by the above-mentioned. The sampling system described. A sampling method using the sampling system according to claim 5,
A step of causing the housing to approach the object to be cut while rotating the cutting bit together with the rotating shaft by the driving source;
Cutting the cutting object with the cutting bit while feeding the liquefied refrigerant from the refrigerant supply pipe into the cylindrical bit portion and freezing and solidifying at least a part of the cutting object;
A sample collection method comprising:

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