KR101994660B1 - Rotary type sample extraction apparatus for investigation of soft ground - Google Patents

Abstract

The present invention relates to a rotary sample collection device for investigating a soft ground, and more specifically, relates to the rotary sample collection device for investigating the soft ground capable of collecting a sample positioned along a depth of the ground such as a sand layer, an alluvial layer, a weathering soil, and a soft ground in stages. In addition, the finishing block is bounded to a rotary shaft to prevent an incomplete coupling state which can be generated while the finishing block and a drill head are separated from each other.

Description

TECHNICAL FIELD [0001] The present invention relates to a rotary sampling apparatus for investigating soft ground,

The present invention relates to a rotary sampling device for surveying soft grounds in the field of geotechnical research, and more particularly, to a rotary sampling device for sampling a soft spot, an allotment layer, a weathered soil and a soft ground, The present invention relates to a rotary sampler for surveying a soft ground for preventing an incomplete coupling state that may occur when a finishing block is bound to a rotary shaft and is spaced apart from a finishing block and a drill head.

Generally, the process of collecting soil samples such as soil and rock while forming boreholes in the ground must be performed in order to determine the parameters required for the design before almost all civil engineering design. It should be performed in order to obtain various geological data such as physicochemical characteristics and stratigraphic structure of the target soil.

Korean Patent Registration No. 10-1364166 (Feb. 11, 2014) discloses a "sampling device for ground and a sampling method using the same."

However, since the conventional sampling apparatus for ground is difficult to contrast due to the incomplete coupling state between the finishing block and the rotating shaft, it is difficult to expect stable driving with the gap between the finishing block and the drill head, have.

Korea Patent Registration No. 10-1364166 (Feb. 17, 2014) "Sampling device for ground and sampling method using the same"

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for collecting a sample placed in depth on a ground such as a fossil bed, an alluvial bed, a weathered soil, The present invention also provides a rotary sampling device for detecting an incomplete coupling state between a finishing block and a drill head.

The problems to be solved by the present invention are not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above-mentioned object, the present invention provides a rotary compressor comprising: a rotary shaft rotatably connected to a drilling machine, the rotary shaft having a supply passage for supplying pressurized water; A drill head (30) installed at a lower end of the rotary shaft (10) and provided with a plurality of bits (32) for boring the ground; A sampling hole portion 54a through which the sample is introduced is formed in a space in which the sample of the ground to be borne by the drill head 30 is accommodated in the rotary shaft 10, A storage case (50) in which a plurality of storage containers And a finishing block (70) detachably installed at an upper end of the rotary shaft (10) and pressing the storage case (50) toward the drill head (30) A binding portion (100) for binding the finishing block (70) to the rotary shaft (10) to prevent the finishing block (70) and the drill head (30) from being separated from each other; And a protecting part 200 protecting the binding part 100. The finishing block 70 has a binding hole 71 communicating with the inside and the outside at one side thereof and the binding part 100 (110), one end of which protrudes to the outside of the finishing block (70) and the other end is coupled to the binding hole (71) so as to be movable in the longitudinal direction so as to face the rotating shaft (10); A flange 120 protruding outwardly from both ends of the pressure bar 110; And a pressing means 130 which presses the flange 120 to bring the other end of the pressing bar 110 into contact with the rotary shaft 10 and the pressing means 130 moves the pressing bar 110 A fixing ring 131 which is coupled to the outside of the binding hole 71 and blocks the outside of the binding hole 71; And a spring 132 coupled to the outside of the pressing bar 110 so as to be positioned between the fixing ring 131 and the flange 120. The protecting part 200 may be formed in a shape such that the pressing bar A protective cover 210 for protecting the other end of the optical fiber 110; A folding member 220 for opening and closing the protective cover 210 to the finishing block 70; A binding member (230) for binding the protective cover (210) in a closed state to the finishing block (70); And an open / hold unit (240) for maintaining the open state of the protective cover (210) when the protective cover (210) is opened.

According to the present invention, since a plurality of storage cases partitioned from each other are continuously provided and grounds borne by the drill head are collected in a stepwise manner in the storage case, samples can be collected so that the samples are not mixed with each other according to the depth of the ground, The accuracy of the investigation can be enhanced.

Further, by connecting the finishing block to the rotary shaft, it is possible to prevent the imperfect bonding state that may occur while being separated from the finishing block and the drill head.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

1 is a perspective view of a rotary sampling device for soft ground survey according to the present invention.
FIG. 2 is an exploded perspective view showing a rotary sampling device for soft ground survey according to the present invention. FIG.
3 is a front view showing a rotary sampling device for surveying soft ground according to the present invention.
4 is a cross-sectional view of a rotary sampling device for soft ground survey according to the present invention.
FIG. 5 is a use state diagram showing a rotary sample collection apparatus for soft ground survey according to the present invention.
6 is a cross-sectional view illustrating a state in which a binding portion is provided in a rotary sample collection apparatus for soft ground survey according to the present invention.
7 is a partially enlarged cross-sectional view showing the binding portion in Fig.
FIG. 8 is a side view showing a state where a protective part is provided in a rotary sample collection apparatus for soft ground survey according to the present invention.
FIG. 9 is a partially enlarged cross-sectional view showing the protective portion in FIG.
And
FIG. 10 is a state of use in which the protection cover is opened in FIG. 9; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 5, a rotary sampling device (hereinafter referred to as a "sample sampling device") for soft ground survey according to the present invention is rotatably connected to a drilling machine, and a supply channel 12 is provided to supply pressurized water. A drill head 30 installed at the lower end of the rotary shaft 10 and provided with a plurality of bits 32 for rotating and boring the ground, a drill head 30 installed at the rotary shaft 10, A storage case 50 having a sampling hole portion 54a provided with a space in which a sample of the ground to be borne by the rotating shaft 10 is borne and a plurality of which are continuously installed in the axial direction of the rotating shaft 10; And a finishing block 70 which is detachably installed and which presses and restrains the storage case 50 toward the drill head 30 side.

The sample collecting apparatus is used for a sand layer, an alluvial layer, a weathered soil and a soft ground, and even if a rock is present in the sand layer, the alluvial layer and the weathering column, Because it is boring, it is possible to collect soil samples.

The sample collecting device transfers a rotational force from the spindle of the drilling machine, performs a boring operation while rotating the spindle at a minimum rotation speed of about 120 rpm, and a boring depth of about 30 m.

Preferably, the storage case 50 is provided so as to be continuous with a length of about 1 m. After the sample is sampled by boring the sample to a depth of about 1 m, the sample is discharged from the ground to collect the sample. .

The rotary shaft 10 is formed in a hollow shaft shape in which a supply passage 12 is formed in an axial direction. The drill head 30 is coupled to a lower end of the rotary shaft 10, (70).

The drill head 30 is provided with a support panel 34 on an upper surface thereof and the plurality of storage cases 50 are installed between the support panel 34 and the finishing block 70.

In the sample collecting apparatus, the four cases of the storage case 50 are continuously arranged so that the sample in the ground can be divided and collected in four stages.

The pressurized water supplied through the supply passage 12 presses and discharges the sample of the ground excavated by the drill head 30 to the outside of the ground and discharges the sample to the outside of the ground. And then flows into the interior of the storage case 50 through the harvesting hole 54a.

A sample which rises along the outer wall of the storage case 50 due to the pressurized water flows into the storage case 50 arranged at the lower end of the rotary shaft 10 and is stored in the storage case 50 arranged at the lower end of the rotary shaft 10, The sample is filled in the next storage case 50 on the upper side and the sample is filled in the upper direction of the rotation shaft 10 in a stepwise manner.

Accordingly, when the storage case 50 is opened to place the sample on the sample plate, the sample collected at the lower end of the rotating shaft 10 is the sample of the upper portion of the ground, and the sample collected at the deepest portion of the ground, (50) arranged at the upper end of the housing (10).

When the sample is placed on the sample plate in the above-described order, the operator can easily recognize the ground layer data of the ground with the naked eye.

Since the plurality of storage cases 50 are connected to the rotary shaft 10 by driving the drilling machine, the storage case 50 can be deeply inserted into the ground 20 m or more, can do.

Therefore, the sample collecting apparatus can obtain the geological data of the soil layer containing the gold, thereby improving the accuracy of the ground survey.

The storage case 50 includes a partition panel 52 having a through hole 52a into which the rotary shaft 10 is inserted and partitioning a space formed by the storage case 50, A first case 54 integrally formed with the rotary shaft 10 and spaced from the rotary shaft 10 to form a sampling hole 54a through which the sample flows, And a second case 56 provided in close contact with the first case 54 to form a space in which the sample is received.

The partition panel 52 is integrally formed to have a circular shape in which the through hole portion 52a is formed at the central portion and the first case 54 extends in the axial direction at a portion corresponding to a half circle of the rim.

The first case 54 is formed of a curved panel having a semicircular cross-sectional shape, and the sampling hole 54a is formed at an upper portion in the left-right direction.

The second case 56 is confined by the partition panel 52 or the finishing block 70 and is in close contact with the first case 54 to form a space for accommodating the sample. And the like.

That is, both the first and second cases 54 and 56 are arranged in close contact with each other to form a cylindrical space surrounding the rotating shaft 10.

A first insertion stepped portion 54b is formed at an upper end of the first case 54 to be inserted into the lower end of the partition panel 52 or the finishing block 70, And a second inserting step 56a is formed at the lower end to be inserted into the upper end of the partition panel 52, the lower end of the partition panel 52, or the lower end of the finishing block 70.

The first insertion stepped portion 54b is formed to be smaller than the outer diameter of the first case 54 so that the lower end of the partition panel 52 or the lower end of the finishing block 52, So that the upper end of the first case 54 is restricted.

The second insertion stepped portion 56a is formed to be smaller than the outer diameter of the second case 56 so as to form a concave step inward of the second case 56 so that the lower end of the partitioning panel 52, Is inserted into the lower end of the finishing block 70 or the upper end of the finishing block 70 so that the upper and lower ends of the second case 56 are constrained.

The upper and lower ends of the first and second cases 54 and 56 are constrained by the first insertion step 54b and the second insertion step 56a to be spaced from the rotary shaft 10, Shape, thereby forming a space for accommodating the sample.

A finishing connection stepped portion 72 is formed at the lower end of the finishing block 70 to receive and confine the first and second insertion stepped portions 54b and 56a. And the second insertion stepped portions 54b and 56a so as to prevent the upper ends of the first and second cases 54 and 56 from spreading outwardly from the rotary shaft 10, Thereby preventing the sample accommodated in the sample container from being lost.

The support panel 34 is installed on the upper surface of the drill head 30 and the support panel 34 or the first insertion step 54b and the second insertion step And a lower connecting stepped portion 52c into which the second insertion step 56a is inserted and an upper connecting stepped portion 52b into which the second inserted stepped portion 56a is inserted is formed at the upper end of the partitioning panel 52. [

The upper and lower connecting stepped portions 52b and 52c are formed to be larger than the outer diameters of the first and second insertion stepped portions 54b and 56a so that the upper ends of the first and second cases 54 and 56 Thereby preventing the sample stored in the storage case 50 from being lost.

A restraining protrusion 54c is formed at the upper end of the first case 54 and a restraining recess 52d is formed at the lower end of the finishing block 70 and the partition panel 52 to receive the restraining protrusion 54c. do.

That is, the restraining protrusions 54c and the restraining recesses 52d prevent the first and second cases 54 and 56 from rotating idly about the rotation axis 10, 54, 56 are rotated together with the partition panel 52.

The first case 54 and the second case 56 are disposed to intersect with each other along the rotating shaft 10 and the rotating shaft 10 The housing case 50 disposed at the lower end of the housing case 50 is opened while the second case 56 is separated from the first housing case 56 and the housing case 50 disposed on the upper side is opened while the second case 56 is separated from the other housing .

As a result, even when the plurality of storage cases 50 are opened, the storage case 50 is opened while the second case 56 is separated in a direction different from the storage case 50 disposed adjacent thereto, 50) from mixing with each other.

The drill head 30 is formed with an excavation groove portion 36 recessed inward on the bottom surface thereof and a drill block 38 having a jet hole portion 38a and a bit 32 for discharging pressurized water is formed on the excavation groove portion 36, Respectively.

The drilling block 38 is installed on the upper surface of an excavation groove 36 which is recessed inwardly in comparison with the bottom surface of the drill head 30, .

Accordingly, when the ground is borne by the drill head 30, the excavating block 38 maintains a space with the ground, and thus a space for injecting pressure water jetted from the jet hole portion 38a is formed.

A plurality of bits 32 are formed in the periphery of the jet hole 38a to form a jet hole 38a at the center of the excavation block 38. Therefore, And the boulder can be crushed by the bit 32.

The bottom surface of the drill head 30 protrudes downward compared with the drill groove 36, and the bottom surface of the drill head 30 has a ring shape.

A plurality of bits 32 are continuously formed on the bottom surface of the ring-shaped drill head 30, so that the drill head 30 is rotated to borne the ground.

Further, since the pressure of water injected from the jet hole portion 38a is discharged to the outside of the drill head 30 and moved to the upper side of the ground, the excavated ground rises along the outer wall of the drill head 30 together with the pressure water.

6 to 7, the finishing block 70 is coupled to the rotating shaft 10 so that the finishing block 70 and the drill head 30 are spaced apart from each other And a binding portion 100 for preventing the binding.

The binding unit 100 prevents the rotation of the finishing block 70, which is detachably screwed to the outside of the upper portion of the rotating shaft 10, due to an external force, incomplete coupling, (30) are separated from each other.

To this end, the finishing block 70 has a binding hole 71 communicating with the inside and outside at one side thereof.

The binding hole 71 is preferably located in a thread formed on the outer peripheral surface of the rotary shaft 10.

The binding unit 100 includes a pressing bar 110 coupled to the binding hole 71 so as to be movable in the longitudinal direction so that one end thereof protrudes outside the finishing block 70 and the other end faces the rotating shaft 10 A flange 120 protruding outwardly from between the opposite ends of the pressure bar 110 and a pressing means for pressing the flange 120 so as to contact the other end of the pressure bar 110 with the rotary shaft 10, (130).

The pressure bar 110 is formed to extend in a direction in which both ends of the pressure bar 110 intersect with the rotary shaft 10.

The pressing bar 110 may have a pressing protrusion 111 formed at the other end of the rotary shaft 10 to be inserted between the threads.

Accordingly, the pressing bar 110 prevents the rotation shaft 10 from rotating while contacting the rotation shaft 10, and the finishing block 70 can be stably fixed to the rotation shaft 10 .

It is preferable that the pressing projection 111 is coated with an adhesive member (not shown) such as silicone on the outer side.

The contact member prevents abrasion or the like caused by contact with the thread formed on the rotary shaft (10), and prevents a sliding or the like so that stable binding can be achieved.

It is preferable that one end of the pressing bar 110 protrudes outwardly of the finishing block 70 through the binding hole 71 and has a length which does not disturb the sampling as much as possible.

The flange 120 may protrude outwardly from the periphery of both ends of the pressure bar 110 and may be integrally formed with the pressure bar 110.

The diameter of the binding hole 71 formed in the inner periphery of the finishing block 70 is smaller than the diameter of the outer periphery of the finishing block 70, It is preferable to prevent it from being released to the inside of the casing.

The pressing unit 130 includes a fixing ring 131 for blocking the outer side of the binding hole 71 that is coupled to the outside of the pressing bar 110, And a spring 132 coupled to the outside of the pressure bar 110 to be positioned.

The fastening hole 71 is threaded on the inner periphery and the fastening ring 131 can be screwed to the fastening hole 71 while forming a thread on the outer circumferential surface.

It is preferable that the fixing ring 131 is coupled so as not to be easily detached to the binding hole 71. If it is difficult to maintain a stable coupled state by screwing, have.

The spring 132 is coupled to the outer side of the pressing bar 110 so as to be positioned between the fixing ring 131 and the flange 120 and the flange 120 is moved as the pressing bar 110 is moved in the longitudinal direction, And is contracted and relaxed by pressing or releasing the pressure.

The spring 132 contracts due to the urging of the flange 120 as the one end of the pressing bar 110 is pulled outwardly while the spring 132 is loosened as the pulling of the pressing bar 110 is released, 120 so that the other end of the pressing bar 110 is in contact with the rotary shaft 10. [

As the other end of the pressing bar 110 is separated from the rotating shaft 10, the finishing block 70 is unbonded and the other end of the pressing bar 110 contacts the rotating shaft 10 And is bound to the rotating shaft (10).

That is, the spring 132 contacts the rotary shaft 10 while the pressing bar 110 is in a relaxed state, so that the finishing block 70 is bound to the rotary shaft 10, The pressing bar 110 is separated from the rotary shaft 10 while the one end of the bar 110 is contracted as it is pulled outward so that the rotary shaft 10 and the finishing block 70 can be separated from each other.

Accordingly, the pressing unit 130 prevents the finishing block 70 and the drill head 30 from being separated from each other, thereby maintaining a stable engagement state.

The pressing means 130 may further include an elastic force adjusting means 133 for adjusting the elastic force of the spring 132.

The elastic force adjusting means 133 is coupled to the outer side of the pressing bar 110 so as to be positioned between the spring 132 and the fixing ring 131 while a thread is formed on the outer peripheral surface thereof, A control lever 134 extending outwardly from the inner circumferential surface of the pressing ring 134 and protruding out of the finishing block 70 through the binding hole 71; ).

The other end of the control lever 135 is integrally connected to the pressure ring 134, and one end of the control lever 135 protrudes outside the finishing block 70 through the binding hole 71.

The elastic force adjusting means 133 is moved in the longitudinal direction of the pressing bar 110 by artificially rotating one end of the adjusting lever 135.

Accordingly, the elastic force adjusting means 133 can adjust the elastic force of the spring 132 while moving in the longitudinal direction of the pressing bar 110 according to the rotation of the adjusting lever 135.

The binding unit 100 may further include a foreign matter preventing member 140 for preventing the sample from flowing between the pressing bar 110 and the adjusting lever 135.

The presser bar 110 has a thread formed on the outer circumferential surface of one end thereof and the foreign matter preventive member 140 may be screwed to the outside of the one end of the presser bar 110, .

The release preventing member 140 is screwed with the pressing bar 110 and is in contact with the adjusting lever 135 so as to move between the pressing bar 110 and the adjusting lever 135 Prevent the sample from entering.

In addition, the release preventing member 140 may prevent the pressure transmitted to the control lever 135 from being transmitted.

Preferably, the releasing member 140 is separated from the pressing bar 110 when transmitting rotational force to the elastic force adjusting means 133.

The engaging portion 100 engages the finishing block 70 with the rotary shaft 10 to prevent the finishing block 70 and the drill head 30 from being separated from each other, So that the sampling operation can be performed.

The sample collecting apparatus according to the present invention further includes a protection unit 200 for protecting the binding unit 100 from the outside as shown in FIG. 8 to FIG.

The protection unit 200 protects the binding unit 100 from pressure, impact, or the like, which is transmitted from the outside to the binding unit 100 at the time of sampling the soft ground.

The protective unit 200 includes a protective cover 210 for protecting the other end of the pressure bar 110, a folding member 220 for opening and closing the protective cover 210 to the finish block 70, A binding member 230 for binding the protective cover 210 in a closed state to the finishing block 70 and an open holding means 240 for keeping the opened state when the protective cover 210 is opened do.

The other end of the pressure bar 110 may be inserted into the protective cover 210 while the other side thereof is opened. Here, the protective cover 210 must be minimally protruded from the finishing block 70 so as not to interfere with the sampling operation.

The protective cover 210 preferably has a curved surface and stably contacts the outer peripheral surface of the finishing block 70.

The protective cover 210 prevents the binding hole 71 from being exposed to the outside together with the other end of the pressing bar 110 to prevent the sample or the like from flowing into the binding hole 71.

The folding member 220 is made of a hinge or the like, and rotatably connects the upper portion of the protective cover 210 to the finishing block 70.

The protective cover 210 is exposed to the outside while one side of the protective cover 210 is directed downward according to the upward rotation in the closed state.

Accordingly, the binding unit 100 can be operated as well as checked.

The protective cover 210 contacts the finishing block 70 with one side of the protective cover 210 being rotated in the downward direction to prevent the pressure bar 110 from being exposed to the outside, So that the binding hole 71 is not exposed to the outside.

Thus, the binding hole 71 is shielded from the outside with the protection of the binding portion 100 so that a sample or the like is transferred between the rotating shaft 10 and the finishing block 70 through the binding hole 71 It is possible to prevent a loosening phenomenon or the like which may be generated when the sheet is drawn in.

The binding member 230 may be formed of a bolt, a screw, or the like, and fixes the lower portion of the protective cover 210.

The protective cover 210 may be fixed to the finishing block 70 by the binding member 230 while a coupling protrusion 211 is formed at a lower portion thereof.

The coupling member 230 is unlocked from the finishing block 70 in accordance with the rotation so that the protective cover 210 is rotatable.

The open and hold means 240 may be made of a magnet 241 and may be provided on the side adjacent to the protective cover 210 in an open state and the finishing block 70.

For example, the protective cover 210 is provided with a magnet on its upper surface, and the finishing block 70 is disposed at a position adjacent to the upper surface of the protective cover 210 when the protective cover 210 is rotated A magnet may be provided.

Accordingly, when the protective cover 210 is opened, it can be held in the open state while being fixed to the finishing block 70 by the binding member 230.

The operation of the binding portion 100 can be stably performed along with the operation of the binding portion 100 as the protection cover 210 is kept open.

The protection unit 200 may further include a tube 250 provided inside the protective cover 210.

The tube 250 maintains the inflated state while being filled with air.

When the protective cover 210 is closed, the tube 250 maintains an expanded state to the extent that the other end of the pressure bar 110 can be inserted into the protective cover 210.

The tube 250 closely contacts between the pressure bar 110 and the protective cover 210 to buffer external impacts and prevent foreign matter from entering the tube.

Therefore, the protection unit 200 can stably protect the binding unit 100 from pressure, impact or the like transmitted from the outside to the binding unit 100.

The present invention is not limited to the above-described embodiment, but may be applied to other types of apparatuses such as the one described in the following claims It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

10: rotating shaft 12:
30: drill head 50: storage case
70: Finishing block 100:
110: pressure bar 111: pressure projection
120: flange 130: pressing means
131: blocking ring 132: spring
133: elastic force adjusting means 134: pressing ring
135: Control lever 140: Foreign matter preventing member
200: Protective part 210: Protective cover
220: folding member 230: binding member
240: Open holding means

Claims (1)

A rotary shaft (10) rotatably connected to a drilling machine and formed with a supply passage (12) for supplying pressurized water;
A drill head (30) installed at a lower end of the rotary shaft (10) and provided with a plurality of bits (32) for boring the ground;
A sampling hole portion 54a through which the sample is introduced is formed in a space in which the sample of the ground to be borne by the drill head 30 is accommodated in the rotary shaft 10, A storage case (50) in which a plurality of storage containers And
And a finishing block (70) detachably installed at an upper end of the rotary shaft (10) and pressing the storage case (50) toward the drill head (30) As a result,
The finishing block 70 is coupled to the rotating shaft 10 to prevent the finishing block 70, which is threadably engaged with the upper portion of the rotating shaft 10 so as to be detachably coupled to the upper portion of the rotating shaft 10, from rotating due to external force or imperfect coupling A binding portion (100) for preventing the drill head (30) from being separated from the finishing block (70); And
And a protection unit (200) for protecting the binding unit (100) from pressurization or impact transmitted from the outside to the binding unit (100) during a sample collection operation for a soft foundation,
The finishing block (70)
A binding hole 71 communicating with the inside and the outside is formed on one side,
The binding portion (100)
A pressing bar 110 having one end protruded outside the finishing block 70 and the other end movably coupled to the binding hole 71 in the longitudinal direction so as to face the rotating shaft 10;
A flange 120 protruding outwardly from both ends of the pressure bar 110;
A pressing means (130) for pressing the flange (120) so that the other end of the pressing bar (110) contacts the rotating shaft (10); And
A foreign matter prevention member which is screwed outside the one end of the pressure bar 110 to prevent the sample from flowing between the pressure bar 110 and the control lever 135 while keeping the state in contact with the control lever 135 140,
The pressure bar (110)
And a pressing protrusion (111) formed at the other end of the rotating shaft (10)
The pressing projection (111)
A contact member is coated on the outer side so as to prevent abrasion due to contact with the thread formed on the rotary shaft 10 and to prevent slippage,
The pressing means (130)
A fixing ring 131 which is coupled to the outside of the pressure bar 110 and blocks the outside of the binding hole 71 opened;
A spring 132 coupled to the outside of the pressure bar 110 to be positioned between the stationary ring 131 and the flange 120; And
And an elastic force adjusting means (133) for adjusting the elastic force of the spring (132)
The spring (132)
The pressing block 110 is brought into contact with the rotary shaft 10 so that the finishing block 70 is engaged with the rotary shaft 10 while maintaining a normally relaxed state, The pressing bar 110 is separated from the rotating shaft 10 so that the rotating shaft 10 and the finishing block 70 can be separated from each other,
The elastic force adjusting means (133)
A pressure ring 134 coupled to the outside of the pressure bar 110 to be positioned between the spring 132 and the fixing ring 131 and screwed to the inner circumference of the binding hole 71; And
And an adjusting lever 135 extending outward from the inner circumferential surface of the pressing ring 134 and protruding out of the finishing block 70 through the binding hole 71, The spring 132 is moved in the longitudinal direction of the pressing bar 110 to adjust the elastic force of the spring 132,
The protection unit 200 includes:
A protective cover 210 for preventing a sample from flowing into the binding hole 71 by preventing the binding hole 71 from being exposed to the outside together with the other end of the pressing bar 110 when one side is opened;
A folding member 220 rotatably connecting an upper portion of the protective cover 210 to the finishing block 70;
A binding member (230) for binding the protective cover (210) in a closed state to the finishing block (70);
Open holding means (240) for holding the opened state when the protective cover (210) is opened; And
And a tube 250 provided inside the protective cover 210,
The protective cover (210)
One side of the pressing bar 110 is exposed to the outside while one side of the pressing bar 110 faces downwardly in the closed state and the other side of the pressing bar 110 is exposed to the outside, The pressing bar 110 is prevented from being exposed to the outside while protecting the binding portion 100 and preventing the binding hole 71 from being exposed to the outside,
The open /
The protective cover 210 in an opened state and the magnet 241 provided on a surface adjacent to the finishing block 70,
The tube (250)
When the protective cover 210 is closed, an impact from the outside is buffered while maintaining the inflated state to the extent that the other end of the pressure bar 110 can be inserted into the protective cover 210, Is prevented from flowing into the soft ground.

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