JP7598635B2 - Unsolidified liquid collecting device and unsolidified liquid recovery method - Google Patents

Description

The present invention relates to an unsolidified liquid collection device and an unsolidified liquid recovery method.

Conventionally, a configuration has been known in which a sampling port that opens in the vertical direction is provided at the bottom of a sampling chamber of a sampling device, and the sampling port is opened and closed by rotating a horizontal plate horizontally around the vertical axis of the sampling chamber (Patent Document 1).
In addition, a configuration in which a sampling port is provided next to the sampling chamber of a sampling device, the open sampling port is opened and closed by moving the top and bottom of a vertically movable cylinder, and the top and bottom of the vertically movable cylinder are opened and closed by combining a spring and a shaft pushing in (Patent Document 2).
In addition, a configuration in which a sampling port is provided next to the sampling chamber of a sampling device, the open sampling port is opened and closed by moving a vertically movable plate up and down, and the sampling port is opened and closed by pushing and pulling an operating rod up and down (Patent Document 3).

JP 2015-81424 A JP 2001-73360 A JP 2013-122166 A

Of the known examples, the one described in Patent Document 1 is configured to open and close the sampling port by rotation alone, and because it is configured to rotate a horizontal rotating plate, it is not easy to seal the rotating sliding surface of the rotating plate with a sealing member, and there is an issue of poor sealing.
Among the known examples, the one described in Patent Document 2 has a spring that blocks the sampling port, which has the problem that if soil or other debris gets stuck while the sampling device is being lowered to the recovery position, there is a risk that the sampling port will open unintentionally.
Among the known examples, the one disclosed in Patent Document 3 has a configuration in which the sampling port is opened and closed by an operating rod, and therefore requires the rod to be inserted into the borehole at the same time, which is problematic in that it is time-consuming.
The present invention provides an improved opening and closing mechanism for the collection port, which allows for the recovery of unsolidified liquid with simple operation and ensures reliable recovery.

The invention of claim 1 is an unsolidified liquid sampling device comprising a case 12 provided with a sampling chamber 11 having a sampling port 13 for sampling unsolidified liquid, a cover 14 for opening and closing the sampling port 13, and an opening/closing mechanism 15 for opening and closing the sampling port 13, the cover 14 and the case 12 being configured to be able to move up and down relative to each other, and the opening/closing mechanism 15 being configured with a screw body 16 provided on either the case 12 or the cover 14 and a screw groove 17 provided on the other, and by rotating either the screw body 16 or the screw groove 17, they are rotated relative to each other to move the cover 14 or the case 12 up and down relative to each other to open and close the sampling port 13.
In the invention of claim 2, the screw body 16 and the screw groove 17 are between the cover 14 and the case 12 and are surrounded by the cover 14 in the unsolidified liquid sampling device.
The invention of claim 3 is an unsolidified liquid sampling device in which the opening and closing mechanism 15 has a screw body 16 on the outer periphery of the case 12 and a screw groove 17 on the inner periphery of the cover 14, and is configured to rotate either the screw body 16 or the screw groove 17 to move the case 12 or the cover 14 up and down to open and close the sampling port 13.
The invention of claim 4 is an unsolidified liquid sampling device in which an upper and lower guide portion 34 for fixedly attaching the rotation transmission member 40 of the drilling shaft 4 is provided on the upper part of the cover 14, and a hole bottom engaging portion 20 for engaging with the bottom surface T of the drilling hole to hold the case 12 in an unrotatable state is provided on the lower part of the case 12, and the cover 14 is rotated forwards and backwards relative to the case 12 to raise and lower the cover 14 relative to the case 12.
The invention of claim 5 is an unsolidified liquid collecting device in which a shaft portion 25 is provided on the upper portion of the screw body 16 of the case 12, into which a rotating cylinder portion 35 of a vertical guide portion 34 of the case 12 is fitted.
The invention of claim 6 is an unsolidified liquid sampling device in which the cover 14 is configured to have a non-perforated blocking tubular portion 30 capable of blocking the sampling port 13, a threaded tubular portion 32 provided above the blocking tubular portion 30 with a thread groove 17 on its inner surface, and an upper and lower guide portion 34 having a rotating tubular portion 35 that fits onto the shaft portion 25 of the case 12 provided above the threaded tubular portion 32, and the blocking tubular portion 30, the threaded tubular portion 32, and the upper and lower guide portions 34 are separate and can be freely attached and detached from each other.
The invention of claim 7 is an unsolidified liquid sampling device in which the cover 14 is configured to have a non-perforated blocking tubular portion 30 capable of blocking the sampling port 13, a threaded tubular portion 32 having a thread groove 17 formed on the upper inner circumference of the blocking tubular portion 30, and an upper and lower guide portion 34 that fits onto the shaft portion 25 of the case 12 provided on the upper side of the threaded tubular portion 32, and a pair of upper and lower sealing members 31 are provided on the inner circumference of the blocking tubular portion 30 of the cover 14 to be positioned on both the upper and lower sides of the sampling port 13 when the cover 14 is in a position to block the sampling port 13.
The invention of claim 8 is an unsolidified liquid sampling device in which the cover 14 is configured to have a non-perforated blocking tubular portion 30 capable of blocking the sampling port 13, a threaded tubular portion 32 having a threaded groove 17 formed on the inner circumference of the upper side of the blocking tubular portion 30, and an upper and lower guide portion 34 that fits into the shaft portion 25 of the case 12 provided on the upper side of the threaded tubular portion 32, a rotation transmission member 40 of the drilling shaft 4 is attached to the upper part of the rotating tubular portion 35 of the upper and lower guide portion 34, and an anti-rotation mechanism 43 is provided between the rotation transmission member 40 and the rotating tubular portion 35 of the upper and lower guide portion 34, and the rotation transmission member 40 and the cover 14 are rotated together by the anti-rotation mechanism 43.
The invention of claim 9 is an unsolidified liquid sampling device in which the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and while the cover 14 and a part of the case 12 are fixed to the ground, the cover 14 is moved up and down by rotating the screw body 16 of the case 12 to open and close the sampling port 13.
The invention of claim 10 is an unsolidified liquid sampling device in which the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, the cover 14 is fixed to the ground, and the case 12 is moved up and down by rotating the screw body 16 to open and close the sampling port 13.
In the invention of claim 11, the sampling device 10 is lowered and inserted into a vertical excavation hole at a construction site excavated by a drilling device, the hole bottom engagement part 20 of the case 12 of the sampling device 10 is inserted and engaged with the bottom surface T of the excavation hole, the rotation of the drilling shaft 4 rotated by the rotary drive part 3 is transmitted to the cover 14 of the sampling device 10, and the cover 14 is moved upward relative to the threaded body 16 of the case 12 by the forward or reverse rotation of the screw groove 17 of the cover 14, thereby opening the sampling port 13 of the sampling chamber 11 of the case 12. The unsolidified liquid is then collected into the collection chamber 11 through the collection port 13, and once the unsolidified liquid has been collected, the rotary drive unit 3 rotates the drilling shaft 4 in reverse or forward direction, and the reverse or forward rotation of the cover 14 causes the screw groove 17 of the cover 14 and the screw body 16 of the case 12 to move the cover 14 downward relative to the case 12, so that the cover 14 closes the collection port 13 of the collection chamber 11 of the case 12, and the collection device 10 is raised to collect the unsolidified liquid, resulting in a method of collecting unsolidified liquid.

In the invention of claim 1, a cover 14 for opening and closing the sampling port 13 is attached to a case 12 having a sampling chamber 11, and an opening/closing mechanism 15 for opening and closing the sampling port 13 is composed of a screw body 16 provided on either the case 12 or the cover 14, and a screw groove 17 provided on the other. Since the opening/closing mechanism 15 is between the cover 14 and the case 12 and surrounded by the cover 14, the opening/closing mechanism 15 operates reliably without being affected by soil and sand in the excavated hole, and unsolidified liquid can be reliably collected. Furthermore, since the opening/closing mechanism 15 is configured to raise and lower the cover 14 using a mechanical element provided between the cover 14 and the case 12, it can be simply configured, and an unsolidified liquid sampling device can be provided at low cost.
In the invention of claim 2, the screw body 16 and the screw groove 17 are located between the cover 14 and the case 12 and are surrounded by the cover 14. Therefore, the screw body 16 and the screw groove 17 are surrounded by the cover 14 and can operate reliably without being affected by soil and sand in the excavated hole, ensuring the collection of unsolidified liquid.
In the invention of claim 3, the opening and closing mechanism 15 is configured to have a screw body 16 on the upper outer periphery of the case 12 and a screw groove 17 on the inner periphery of the cover 14, and to open and close the sampling port 13 by rotating either the screw body 16 or the screw groove 17 to move the case 12 or the cover 14 up and down, thereby ensuring design freedom and providing an unsolidified liquid sampling device.
In the invention of claim 4, an upper and lower guide portion 34 is provided on the upper part of the cover 14 to fix the rotation transmission member 40 of the drilling shaft 4 in a fixed state, and a hole bottom engagement portion 20 is provided on the lower part of the case 12 to engage with the bottom surface T of the drilling hole to keep the case 12 in an unrotatable state, and the cover 14 is rotated forwards and backwards relative to the case 12 to raise and lower the cover 14 relative to the case 12. Therefore, the cover 14 can be raised and lowered reliably in a rational configuration relative to the case 12 to open and close the sampling port 13. Furthermore, since the lower part of the case 12 is engaged with the bottom surface T of the drilling hole and only the cover 14 is raised and lowered, the soil sample (unsolidified liquid) can be collected without the entire sampling device 10 extending and retracting up and down, improving operability.
In the invention of claim 5, a shaft portion 25 into which the vertical guide portion 34 and rotating cylinder portion 35 of the case 12 are fitted is provided on the upper portion of the screw body 16 of the case 12, so that the cover 14 can rotate smoothly and move smoothly up and down.
In the invention of claim 6, the cover 14 is configured to have a non-perforated blocking tubular portion 30 capable of blocking the sampling port 13, a threaded tubular portion 32 having a thread groove 17 formed on the inner circumference of the upper side of the blocking tubular portion 30, and an upper and lower guide portion 34 that fits into the shaft portion 25 of the case 12 provided on the upper side of the threaded tubular portion 32, and the blocking tubular portion 30, the threaded tubular portion 32, and the upper and lower guide portion 34 are configured as separate bodies that can be freely attached and detached from each other, making manufacture, assembly, and maintenance easy.
In the invention of claim 7, a pair of upper and lower sealing members 31 are provided on both the upper and lower inner circumferences of the blocking tube portion 30 at a position corresponding to the sampling port 13 of the sampling chamber 11 of the case 12, so that the sealing performance when the cover 14 blocks the sampling port 13 can be ensured, the recovery accuracy of the soil sample (unsolidified liquid) can be improved, and the configuration can be simplified.
In the invention of claim 8, a rotation prevention mechanism 43 is provided between the rotation transmission member 40 and the rotating cylinder portion 35 of the upper and lower guide portion 34, so that the upper and lower guide portion 34 can rotate integrally with the rotation transmission member 40 while allowing the upper and lower guide portion 34 to move up and down relative to the rotation transmission member 40, and the cover 14 can be rotated relative to the case 12 to move up and down to open and close the sampling port 13.
In the invention of claim 9, the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and while the cover 14 and a part of the case 12 are fixed to the ground, the cover 14 is moved up and down by rotating the screw body 16 to open and close the sampling port 13. Therefore, the opening/closing mechanism 15 operates reliably without being affected by soil and sand in the excavated hole, and unsolidified liquid can be reliably sampled.
In the invention of claim 10, the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and the cover 14 is fixed to the ground and the case 12 is moved up and down by rotating the screw body 16 to open and close the sampling port 13, so that the opening/closing mechanism 15 operates reliably without being affected by soil and sand in the excavated hole, and unsolidified liquid can be reliably sampled.
In the invention of claim 11, the sampling device 10 is lowered and inserted into a vertical excavation hole at a construction site excavated by a drilling device, the hole bottom engagement part 20 of the case 12 of the sampling device 10 is inserted and engaged with the bottom surface T of the excavated hole, the rotation of the drilling shaft 4 rotated by the rotary drive part 3 is transmitted to the cover 14 of the sampling device 10, and the cover 14 is raised relative to the threaded body 16 of the case 12 by the forward or reverse rotation of the screw groove 17 of the cover 14, thereby opening the sampling port 13 of the sampling chamber 11 of the case 12, and the unsolidified liquid is collected from the sampling port 13 into the sampling chamber 11. When the unsolidified liquid is collected, the rotary drive part 20 is rotated. The moving part 3 rotates the drilling shaft 4 in the reverse or forward direction, and the reverse or forward rotation of the cover 14 causes the screw groove 17 of the cover 14 and the screw body 16 of the case 12 to move the cover 14 downward relative to the case 12, so that the cover 14 closes the sampling port 13 of the sampling chamber 11 of the case 12 and the sampling device 10 is raised to recover the unsolidified liquid.Therefore, the sampling device 10 operates reliably without being affected by soil and sand in the excavated hole and can reliably collect unsolidified liquid.Furthermore, the cover 14 is raised and lowered by a mechanical element provided between the cover 14 and the case 12, so that the configuration is simple.

A side view of the base machine with the collection device attached. FIG. 2 is a front view of the sampling port of the sampling device in an open state. FIG. 2 is a front view of the collection port of the collection device in a closed state. FIG. FIG. 1 is a front view of the sampling device inserted into the drilling hole. FIG. 1 is a front view of the sampling device reaching the bottom of the borehole. FIG. 13 is a front view of the state in which unsolidified liquid flows into the sampling chamber of the sampling device. 1 is a front view of the state in which the sampling chamber of the sampling device is filled with unsolidified liquid and the sampling port is closed. FIG. FIG. 1 is a front view of the sampling device being raised (pulled up) from the drilling hole. 1A is an exploded view of another embodiment of the sampling device, (B) is a partial vertical sectional front view of the same sampling port in an open state, (C) is a partial vertical sectional front view of the same sampling port in a closed state. FIG. 13 is an exploded view of another embodiment of a collection device. 1A is a partial vertical sectional front view of the sampling port in a closed state, and FIG.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a base machine, 2 denotes a leader attached to the base machine 1, and 3 denotes a rotary drive unit (earth auger) attached to the leader 2 so as to be able to rise and fall. The upper part of an excavation shaft 4 is attached to the rotary drive unit 3 (Figure 1).
A screw 5 is provided on the outer periphery of the drilling shaft 4 .
A sampling device 10 for sampling unsolidified liquid (sample) is provided under the excavation shaft 4. Although not shown, the sampling device 10 is used to excavate a vertical hole in the ground using a soil improvement excavation device, and to mix the excavated soil with soil improvement material (cement milk, etc.) to collect a sample of the improved soil.

The sampling device 10 is configured to include a case 12 having a sampling chamber 11, a cover 14 for opening and closing a sampling port 13 of the sampling chamber 11, and an opening/closing mechanism 15 for opening and closing the sampling port 13 (FIG. 2).
The opening/closing mechanism 15 is composed of a screw body (male screw) 16 provided on either the case 12 or the cover 14, and a screw groove (female screw/screw hole) 17 provided on the other, and is configured to open and close the sampling port 13 by moving the cover 14 up and down relative to the case 12 by the action of the screw body 16 and the screw groove 17.
In this embodiment, a screw body 16 is provided on the upper outer periphery of the case 12, and a screw groove 17 is provided on the inner periphery of the cover 14, and the collection port 13 is opened and closed by rotating either the screw body 16 or the screw groove 17 to move the cover 14 up and down relative to the case 12.

A hole bottom engaging part (insertion part) 20 that engages with the bottom T of the vertical hole excavated by the soil improvement excavation device is provided at the bottom of the case 12, and a sampling chamber 11 for sampling soil samples is provided above the hole bottom engaging part 20 (Fig. 2). The sampling chamber 11 is formed in a cylindrical shape, and a sampling port 13 is opened at the top of the sampling chamber 11. The sampling port 13 is opened by penetrating the cylindrical part 21 of the sampling chamber 11 in a direction intersecting the axis so that the vertical hole in the ground and the sampling chamber 11 communicate with each other (Figs. 2 and 5).
Reference numeral 18 denotes a plug for closing a sample outlet (not shown) of the sampling chamber 11, and the plug 18 is removed above ground to remove and recover the sample in the sampling chamber 11.
For ease of understanding, the sampling port 13 is disposed at the front in FIG. 2 and opens at the front and side in FIG. 5, but the location of the opening is arbitrary and is not limited to the configuration shown in the figure.
The lower part of the threaded body 16 that constitutes a part of the opening/closing mechanism 15 is integrally provided on the upper side of the sampling chamber 11 (cylindrical part 21) (FIG. 4). The threaded body 16 is formed into a threaded shaft shape with a thread groove formed on the outer periphery.
The cover 14 is provided on the lower side with a blocking tubular portion 30 capable of blocking the sampling port 13 (FIG. 4). The blocking tubular portion 30 is formed of a tubular member with a non-perforated outer periphery, and is configured so as to be capable of blocking the sampling port 13. A pair of seal members (O-rings, etc.) 31 are provided on the inner periphery of the blocking tubular portion 30 at a position corresponding to the sampling port 13 in the blocked state so that the blocking tubular portion 30 is positioned above and below the blocked sampling port 13 (FIG. 3).

A threaded cylindrical portion 32 having a thread groove 17 formed on its inner circumference is provided on the upper side of the closing cylindrical portion 30, and a vertical guide portion 34 is provided on the upper portion of the threaded cylindrical portion 32.
The vertical guide portion 34 has a rotating cylinder portion 35 which rotates relative to the case 12 which is in a fixed state, and the rotating cylinder portion 35 is fitted onto the shaft portion 25 of the case 12 (FIG. 2).
Thus, the cover 14 is moved up and down relative to the case 12 by the action of the screw body 16 and the screw groove 17 to open and close the sampling port 13, and the rotation of the drilling shaft 4 is transmitted to the upper part of the cover 14 to rotate the cover 14, and the screw groove 17 is rotated relative to the screw body 16 to move the cover 14 up and down.
Therefore, the cover 14 can be raised and lowered by utilizing the rotation of the drilling shaft 4, resulting in a simple structure and reliable operation.

The configuration for rotating the cover 14 by the rotation of the drilling shaft 4 is arbitrary, but in one example, a rotation transmission member 40 is attached to the lower part of the drilling shaft 4, and the rotating cylinder part 35 of the vertical guide part 34 of the cover 14 is fitted into the rotation transmission member 40. A rotation stop mechanism 43 is provided between the rotation transmission member 40 and the rotating cylinder part 35 of the vertical guide part 34, which rotates the vertical guide part 34 integrally with the rotation transmission member 40 while allowing the vertical guide part 34 to move up and down relative to the rotation transmission member 40. The rotation stop mechanism 43 forms an attachment hole 36 in the rotating cylinder part 35, and fits the key member 24 into the attachment hole 36 so as to be vertically movable, and the key member 24 is attached in a fixed state to the rotation transmission member 40.
Therefore, the hole bottom engagement portion 20 at the bottom of the case 12 is engaged with the bottom surface T of the excavation hole to hold the case 12 in an unrotatable state, and the cover 14 is rotated forwards and backwards relative to the case 12 to raise and lower the cover 14 relative to the case 12.

That is, the sampling device 10 is lowered and inserted into a vertical excavation hole at the construction site excavated by the excavation device, the hole bottom engagement portion 20 of the case 12 of the sampling device 10 is inserted and engaged with the bottom surface T of the excavation hole, the rotation of the drilling shaft 4 rotated by the rotation drive unit 3 is transmitted to the cover 14 of the sampling device 10, and the cover 14 is raised relative to the screw body 16 of the case 12 by rotation of the screw groove 17 of the cover 14, thereby opening the sampling port 13 of the sampling chamber 11 of the case 12, and unsolidified liquid is collected into the sampling chamber 11 from the sampling port 13. Once the unsolidified liquid has been collected, the drilling shaft 4 is rotated in the reverse direction by the rotation drive unit 3, and the reverse rotation of the cover 14 causes the screw groove 17 of the cover 14 and the screw body 16 of the case 12 to move the cover 14 downward relative to the case 12, so that the cover 14 closes the sampling port 13 of the sampling chamber 11 of the case 12, and the sampling device 10 is raised to collect the unsolidified liquid.
In this case, the key member 24 of the rotation prevention mechanism 43 of the cover 14 moves within the movement groove 36A of the rotation transmission member 40 together with the up and down movement of the cover 14.
Incidentally, the drilling shaft 4 has a double shaft configuration consisting of an outer cylinder equipped with the screw 5 and a shaft portion attached to the rotation transmission member 40, but this is not a requirement of the present invention, and the symbol in the figure indicates the shaft portion attached to the rotation transmission member 40.

Furthermore, Figure 10 shows another embodiment, which is composed of a case 12 provided with a sampling chamber 11 having a sampling port 13 for sampling unsolidified liquid, a cover 14 for opening and closing the sampling port 13, and an opening and closing mechanism 15 for opening and closing the sampling port 13. The opening and closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and while the cover 14 and a part of the case 12 are fixed to the ground, the screw body 16 is rotated to move the cover 14 up and down relative to the case 12 in a non-rotating state, thereby opening and closing the sampling port 13.
The specific configuration is arbitrary, but as an example, a screw body 16 that forms part of the opening and closing mechanism 15 is provided on the underside of the sampling chamber 11 (cylindrical portion 21) of the case 12, and the lower part of the drilling shaft 4 is fixedly attached to the upper part of the sampling chamber 11 by a bolt 21A, so that the case 12 can be freely rotated in both forward and reverse directions by the drilling shaft 4.

A shaft 25 is provided at the bottom of the threaded body 16 of the case 12, and the shaft 25 is fitted into a cylindrical fixed cylinder 37 so as to be rotatable only, and a hole bottom engagement part 20 is provided at the lower end of the fixed cylinder 37, which engages with the bottom surface T of the excavation hole to keep the fixed cylinder 37 in an unrotatable state. 25A is a bearing provided at the top of the fixed cylinder 37. The cover 14 has a closing cylinder 30 on the upper side that can close the sampling port 13, and a pair of seal members (O-rings, etc.) 31 are provided on the inner periphery of the closing cylinder 30 to prevent the soil sample from leaking when the sampling port 13 is closed.
A threaded cylindrical portion 32 having a thread groove 17 formed on its inner circumference is provided below the closing cylindrical portion 30 , and a cover side fixed cylindrical portion 38 that fits onto the outer circumference of a fixed cylindrical portion 37 of the case 12 is provided below the threaded cylindrical portion 32 .

An anti-rotation mechanism 43 for stopping rotation of the cover 14 is provided between the fixed cylinder portion 37 of the case 12 and the cover side fixed cylinder portion 38. The anti-rotation mechanism 43 forms a mounting hole 36 in the cover side fixed cylinder portion 38, and fits a key member 24 into the mounting hole 36. The key member 24 engages with a moving groove 39 (corresponding to moving groove 36A) provided on the outer periphery of the fixed cylinder portion 37 of the case 12 so as to be movable up and down.
Therefore, the case 12 is rotated forwards or backwards relative to the cover 14, and the cover 14 is moved up and down in a non-rotating state to move downwards, thereby opening and closing the sampling port 13.
11 and 12 show another embodiment, which is composed of a case 12 provided with a sampling chamber 11 having a sampling port 13 for sampling unsolidified liquid, a cover 14 for opening and closing the sampling port 13, and an opening/closing mechanism 15 for opening and closing the sampling port 13. The opening/closing mechanism 15 is composed of a screw body 16 provided in the case 12 and a screw groove 17 provided in the cover 14, and the cover 14 is fixed to the ground. The case 12 is moved up and down by rotating the screw body 16, thereby opening and closing the sampling port 13.

The specific configuration is arbitrary, but as an example, a screw body 16 that forms part of the opening and closing mechanism 15 is provided on the underside of the sampling chamber 11 (cylindrical portion 21) of the case 12, and the lower part of the drilling shaft 4 is attached to the upper part of the sampling chamber 11, so that the case 12 can be freely rotated forward and backward by the drilling shaft 4.
The cover 14 has a blocking tube portion 30 on the upper side capable of blocking the sampling port 13, and a pair of sealing members (O-rings, etc.) 31 are provided on the inner circumference of the blocking tube portion 30 to prevent the soil sample from leaking when the sampling port 13 is blocked.
A threaded cylindrical portion 32 having a thread groove 17 formed on its inner circumference is provided below the closing cylindrical portion 30, and a space cylindrical portion 34A is attached to the lower part of the threaded cylindrical portion 32 to ensure space for the threaded body 16 of the case 12 to move up and down. A hole bottom engaging portion 20 is provided below the space cylindrical portion 34A to engage with the bottom surface T of the excavated hole to keep the cover 14 unable to rotate.
Therefore, the case 12 is rotated forwards or backwards relative to the cover 14 which is fixed by the hole bottom engagement portion 20, and the case 12 is moved up and down relative to the cover 14 to open and close the sampling port 13.

(Operation of the embodiment)
The present invention has the above-mentioned configuration. First, a drilling device (not shown) is attached to the drilling shaft 4 of the rotary drive unit 3, a vertical hole is excavated at the construction site, and a ground improvement material (cement milk, etc.) for ground improvement is stirred and mixed into the excavated soil to perform ground improvement.
Next, in place of the excavation device of the excavation shaft 4, a sampling device 10 is attached for sampling soil samples (unsolidified liquid) from the stirred and mixed soil and sand before it solidifies.
In this state, the rotary drive unit 3 is lowered so that the hole bottom engagement portion 20 of the case 12 of the sampling device 10 is inserted into and engaged with the bottom of the excavated hole, and the case 12 of the sampling device 10 is held in a fixed state so that it cannot move up and down or rotate.

Next, when the drilling shaft 4 is rotated by the rotary drive unit 3 , the rotation of the drilling shaft 4 is transmitted to the upper and lower guide parts 34 of the cover 14 via the rotary transmission member 40 and the anti-rotation mechanism 43 , and the cover 14 begins to rotate around the center of the case 12 .
When the cover 14 begins to rotate, the cover 14 moves upward relative to the case 12 due to the action of the threaded groove 17 of the cover 14 and the screw body 16 of the case 12, and when the lower end of the blocking tube portion 30 of the cover 14, which was blocking the sampling port 13 of the sampling chamber 11 of the case 12, is positioned above the sampling port 13, unsolidified liquid flows into the sampling chamber 11 from the sampling port 13, and the collection (flow) of the unsolidified liquid can be confirmed by any method.

Once the collection of unsolidified liquid has been confirmed by any method, the drilling shaft 4 is rotated in the opposite direction by the rotary drive unit 3, causing the cover 14 to begin reverse rotation. The reverse rotation of the cover 14 causes the thread groove 17 of the cover 14 and the screw body 16 of the case 12 to act in the opposite manner to that described above, causing the cover 14 to move downward relative to the case 12, and the closing tube portion 30 of the cover 14 to close the collection port 13 of the collection chamber 11 of the case 12. Once the collection port 13 is closed, the rotary drive unit 3 is raised, the collection device 10 is positioned above the ground surface, and the plug 18 of the collection chamber 11 of the case 12 is removed to recover the unsolidified liquid (sample) from within the collection chamber 11.
The sampling device 10, which is provided at the bottom of the drilling shaft 4, is composed of a case 12 having a sampling chamber 11, a cover 14 which opens and closes the sampling port 13 of the sampling chamber 11, and an opening/closing mechanism 15 which opens and closes the sampling port 13. The cover 14 is configured so that it can move freely up and down relative to the case 12, and the opening/closing mechanism 15 is located between the cover 14 and the case 12 and surrounded by the cover 14, so that the opening/closing mechanism 15 operates reliably without being affected by soil and sand, ensuring the collection of unsolidified liquid.

The opening and closing mechanism 15 is configured to raise and lower the cover 14 by a mechanical element provided between the cover 14 and the case 12, so that the configuration is simple and an unsolidified liquid sampling device can be provided at low cost.
The opening/closing mechanism 15 is composed of a screw body 16 provided on either the case 12 or the cover 14, and a screw groove 17 provided on the other, so that the cover 14 can be moved up and down relative to the case 12 by the action of the screw body 16 and the screw groove 17, thereby opening and closing the sampling port 13.
A threaded body 16 is provided on the upper outer periphery of the case 12, and a threaded groove 17 is provided on the inner periphery of the cover 14. Either the threaded body 16 or the threaded groove 17 is rotated to move the cover 14 up and down relative to the case 12 to open and close the sampling port 13, thereby ensuring freedom of design and providing an unsolidified liquid sampling device.

In addition, since the cover 14 alone is moved up and down while the hole bottom engagement portion 20 at the bottom of the case 12 is engaged with the bottom surface T of the excavated hole, soil samples (unsolidified liquid) can be collected without the entire sampling device 10 extending or retracting up and down, improving operability.
A screw body 16 is provided on the upper outer periphery of the case 12, an upper and lower guide portion 34 for fixedly attaching the rotation transmission member 40 of the drilling shaft 4 is provided on the upper part of the cover 14, and a hole bottom engagement portion (insertion portion) 20 for engaging with the bottom surface T of the drilling hole to keep the case 12 imrotatable is provided on the lower part of the case 12. The cover 14 is configured to be raised and lowered by rotating forward and backward relative to the case 12, so that the cover 14 can be raised and lowered relative to the case 12 in a rational configuration.
Since a shaft portion 25 into which a rotating cylinder portion 35 of a vertical guide portion 34 of the case 12 is fitted is provided on the upper portion of the threaded body 16 of the case 12, the cover 14 rotates smoothly and moves smoothly up and down.

The cover 14 is composed of a non-perforated closure tubular portion 30 capable of closing the sampling port 13, a threaded tubular portion 32 having a thread groove 17 formed on the inner circumference of the upper side of the closure tubular portion 30, and an upper and lower guide portion 34 that fits into the shaft portion 25 of the case 12 provided on the upper side of the threaded tubular portion 32. The closure tubular portion 30, the threaded tubular portion 32, and the upper and lower guide portions 34 are separate and can be freely attached and detached from each other, making manufacture, assembly, and maintenance easy.
A pair of upper and lower sealing members 31 are provided on both the upper and lower inner circumferences of the blocking tube portion 30 at a position corresponding to the sampling port 13 of the sampling chamber 11 of the case 12, thereby simplifying and improving the sealing performance when the cover 14 blocks the sampling port 13.

An anti-rotation mechanism 43 is provided between the rotation transmission member 40 and the rotating cylinder portion 35 of the upper and lower guide portion 34. The anti-rotation mechanism 43 forms an attachment hole 36 in the rotating cylinder portion 35 and engages the key member 24 into the attachment hole 36 so that it can move freely up and down. The key member 24 is fixedly attached to the rotation transmission member 40 side, so that the upper and lower guide portion 34 can rotate integrally with the rotation transmission member 40 while being allowed to move up and down relative to the rotation transmission member 40. The cover 14 can be rotated relative to the case 12 to move it up and down to open and close the sampling port 13.
In addition, in the embodiment of Figure 10, the lower part of the drilling shaft 4 is attached to the upper part of the sampling chamber 11 of the case 12, a fixed cylindrical portion 37 is provided which is rotatably attached to the lower part of the threaded body 16 of the case 12, and a hole bottom engaging portion 20 is provided at the lower end of the fixed cylindrical portion 37 which engages with and holds the bottom surface T of the drilling hole. Therefore, the hole bottom engaging portion 20 of the fixed cylindrical portion 37 of the case 12 is engaged with the bottom surface T of the drilling hole, thereby holding the fixed cylindrical portion 37 of the case 12 in an unrotatable state relative to the ground.

The fixed cylinder portion 37 of the case 12 is provided with an anti-rotation mechanism 43 that stops the rotation of the cover 14, so that the cover 14 is fixed to the ground together with the fixed cylinder portion 37 by the anti-rotation mechanism 43.
When the drilling shaft 4 is rotated in this state, the sampling chamber 11 (cylindrical portion 21) and the screw body 16 of the case 12 rotate relative to the fixed tube portion 37 and the ground, and due to the action of the screw body 16 of the case 12 and the screw groove 17 of the cover 14, the cover 14 moves downward relative to the case 12, and the blocking tube portion 30 of the cover 14, which was blocking the sampling port 13 of the sampling chamber 11 of the case 12, is positioned lower than the sampling port 13, and unsolidified liquid flows into the sampling chamber 11 from the sampling port 13. This inflow of unsolidified liquid can be confirmed by any method.

Once the inflow and collection of unsolidified liquid has been confirmed by any method, the drilling shaft 4 is rotated in the opposite direction by the rotary drive unit 3, causing the case 12 to rotate backwards, and the screw body 16 of the case 12 and the screw groove 17 of the cover 14 act in the opposite manner to the above, causing the cover 14 to move upward relative to the case 12, and the closing tube portion 30 of the cover 14 closes the collection port 13 of the collection chamber 11 of the case 12. Once the collection port 13 is closed, the entire collection device 10 is raised, and the collection device 10 is positioned above the ground surface, and unsolidified liquid is collected from the collection chamber 11 of the case 12.
In this manner, by rotating the case 12 forward or backward relative to the cover 14 and the screw body 16 of the case 12 forward or backward relative to the fixed screw groove 17, the cover 14 is raised or lowered in a non-rotating state to open or close the sampling port 13.

In this case, the up and down movement of the cover 14 is permitted by moving the key member 24, which is fitted into the mounting hole 36 of the cover side fixed tube portion 38 of the cover 14, up and down within a moving groove 39 provided on the outer periphery of the fixed tube portion 37 of the case 12.
In addition, since the lower part of the drilling shaft 4 is fixed to the upper part of the cylindrical part 21 of the sampling chamber 11 by a bolt 21A, the drilling shaft 4, the cylindrical part 21 of the sampling chamber 11 and the screw body 16 rotate integrally.
In addition, the lower shaft portion 25 of the screw body 16 of the case 12 is fitted into the fixed cylindrical portion 37 via the bearing 25A so as to be freely rotatable only. Therefore, with the shaft portion 25 of the case 12 supported by the fixed cylindrical portion 37 which is held in a fixed state on the ground by the hole bottom engaging portion 20, the entire case 12 can rotate smoothly and without contact with the axis, and the cover 14 can be reliably raised and lowered.
In another embodiment of Figures 11 and 12, the cover 14 is moved up and down relative to the case 12 to open and close the sampling port 13, and the hole bottom engagement portion 20 of the space cylinder portion 34A of the cover 14 is engaged with the bottom surface T of the excavation hole to keep the cover 14 in an unrotatable state.

When the drilling shaft 4 is rotated in this state, the case 12 rotates, and due to the action of the screw body 16 of the case 12 and the screw groove 17 of the cover 14, the case 12 moves upward relative to the cover 14.When the case 12 is positioned above the lower end of the blocking tube portion 30 of the cover 14, which was blocking the sampling port 13 of the sampling chamber 11 of the case 12, unsolidified liquid flows into the sampling chamber 11 from the sampling port 13, and the collection of the unsolidified liquid can be confirmed by any method.
Once the collection of unsolidified liquid has been confirmed by any method, the drilling shaft 4 is rotated in the opposite direction by the rotary drive unit 3, causing the case 12 to begin reverse rotation, and the screw body 16 of the case 12 and the screw groove 17 of the cover 14 act in the opposite manner to the above, causing the case 12 to move downward relative to the cover 14, and the collection port 13 of the collection chamber 11 of the case 12 is blocked by the blocking tube portion 30 of the cover 14. Once the collection port 13 is blocked, the rotary drive unit 3 is raised, the collection device 10 is positioned above the ground surface, and the unsolidified liquid is collected from the collection chamber 11 of the case 12.

1...base machine, 2...leader, 3...rotary drive unit, 4...drilling shaft, 5...screw, 10...collection device, 11...collection chamber, 12...case, 13...collection port, 14...cover, 15...opening/closing mechanism, 16...threaded body, 17...thread groove, 20...hole bottom engagement part, 21...cylindrical part, 24...key member, 25...bearing part (shaft part), 25A...bearing, 30...closure tube part, 31...sealing member, 32...thread groove tube part, 34...upper and lower guide part, 35...rotating tube part, 36...mounting hole, 36A...moving groove, 37...fixed tube part, 38...cover side fixed tube part, 39...moving groove, 40...rotation transmission member, 43...anti-rotation mechanism.

Claims (11)

An unsolidified liquid collection device that is configured to open and close the collection port 13 by rotating either the case 12, which has a collection chamber 11 with a collection port 13 for collecting unsolidified liquid, a cover 14 for opening and closing the collection port 13, and an opening and closing mechanism 15 for opening and closing the collection port 13, the cover 14 and the case 12 being configured to be movable up and down relative to each other, and the opening and closing mechanism 15 being configured to be a screw body 16 provided on either the case 12 or the cover 14, and a screw groove 17 provided on the other, and the cover 14 or the case 12 being moved up and down relative to each other by rotating either the screw body 16 or the screw groove 17, opening and closing the collection port 13. In claim 1, the screw body 16 and the screw groove 17 are between the cover 14 and the case 12, and are surrounded by the cover 14. An unsolidified liquid collection device. In claim 1 or claim 2, the opening/closing mechanism 15 is configured to have a threaded body 16 on the outer periphery of the case 12, a threaded groove 17 on the inner periphery of the cover 14, and to rotate either the threaded body 16 or the threaded groove 17 to move the case 12 or the cover 14 up and down to open and close the collection port 13. An unsolidified liquid collection device. In claim 3, an unsolidified liquid collection device is provided in which an upper and lower guide portion 34 is provided on the upper portion of the cover 14 to which the rotation transmission member 40 of the drilling shaft 4 is fixedly attached, and a hole bottom engagement portion 20 is provided on the lower portion of the case 12 to engage with the bottom surface T of the drilling hole to hold the case 12 in an unrotatable state, and the cover 14 is rotated forward and backward relative to the case 12 to raise and lower the cover 14 relative to the case 12. In claim 4, the unsolidified liquid collection device has a shaft portion 25 on the upper part of the screw body 16 of the case 12, into which the rotating cylinder portion 35 of the upper and lower guide portion 34 of the case 12 fits. In claims 1 to 5, the cover 14 is configured to have a non-perforated blocking tube 30 capable of blocking the sampling port 13, a threaded tube 32 provided on the upper side of the blocking tube 30 with a threaded groove 17 on the inner peripheral surface, and an upper and lower guide section 34 having a rotating tube section 35 that fits onto the shaft section 25 of the case 12 provided on the upper side of the threaded tube section 32, and the blocking tube section 30, the threaded tube section 32, and the upper and lower guide sections 34 are configured as separate bodies that can be attached and detached from each other. An unsolidified liquid sampling device. In claims 1 to 6, the cover 14 is configured with a non-perforated blocking tube 30 capable of blocking the sampling port 13, a threaded tube 32 with a threaded groove 17 on the inner circumference of the upper side of the blocking tube 30, and an upper and lower guide portion 34 that fits onto the shaft portion 25 of the case 12 provided on the upper side of the threaded tube 32, and an unsolidified liquid sampling device in which a pair of upper and lower seal members 31 are provided on the inner circumference of the blocking tube 30 of the cover 14 and positioned on both the upper and lower sides of the sampling port 13 when the cover 14 is in a position to block the sampling port 13. In claims 1 to 7, the cover 14 is configured to have a non-perforated blocking tube 30 capable of blocking the sampling port 13, a threaded tube 32 with a threaded groove 17 on the inner circumference of the upper side of the blocking tube 30, and an upper and lower guide section 34 that fits onto the shaft section 25 of the case 12 provided on the upper side of the threaded tube 32, a rotation transmission member 40 of the drilling shaft 4 is attached to the upper part of the rotating tube section 35 of the upper and lower guide section 34, and a rotation stop mechanism 43 is provided between the rotation transmission member 40 and the rotating tube section 35 of the upper and lower guide section 34, and the rotation stop mechanism 43 rotates the rotation transmission member 40 and the cover 14 together. In claim 1, the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and the cover 14 and a part of the case 12 are fixed to the ground, and the cover 14 is moved up and down by rotating the screw body 16 of the case 12 to open and close the sampling port 13. In claim 1, the opening/closing mechanism 15 is composed of a screw body 16 provided on the case 12 and a screw groove 17 provided on the cover 14, and the cover 14 is fixed to the ground, and the case 12 is moved up and down by rotating the screw body 16 to open and close the sampling port 13. An unsolidified liquid sampling device. The sampling device 10 is lowered and inserted into a vertical excavation hole at the construction site excavated by the excavation device, the hole bottom engagement part 20 of the case 12 of the sampling device 10 is inserted and engaged with the bottom surface T of the excavation hole, the rotation of the drilling shaft 4 rotated by the rotation drive part 3 is transmitted to the cover 14 of the sampling device 10, and the cover 14 is raised relative to the threaded body 16 of the case 12 by the forward or reverse rotation of the screw groove 17 of the cover 14, thereby opening the sampling port 13 of the sampling chamber 11 of the case 12. , unsolidified liquid is collected from the collection port 13 into the collection chamber 11, and once the unsolidified liquid has been collected, the rotary drive unit 3 rotates the drilling shaft 4 in the reverse or forward direction, and the reverse or forward rotation of the cover 14 causes the screw groove 17 of the cover 14 and the screw body 16 of the case 12 to move the cover 14 downward relative to the case 12, causing the cover 14 to close the collection port 13 of the collection chamber 11 of the case 12, and the collection device 10 is raised to collect the unsolidified liquid.

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