JP6997983B2 - Unsolidified liquid recovery device and unsolidified liquid recovery method - Google Patents

Description

The present invention relates to an unsolidified liquid recovery device and an unsolidified liquid recovery device method used for collecting unsolidified liquid in operations such as root consolidation at the lower end of a pile, bulb formation, and fixing around a pile in foundation pile construction. It is a thing.

Conventionally, for example, in the implementation of a ready-made pile embedding method, a root-solidifying liquid is injected into the ground and mixed with soil, and then the root-solidifying liquid is collected in an unsolidified state and mixed with the soil. We are conducting quality control work to investigate the stirring state and predict the strength after solidification.
For collecting this uncured liquid, conventionally, for example, a collector is attached to the lower end of the rod of the excavator used for building piles, and an operation rod for opening and closing the uncured liquid collection port of the collector is moved upward along the excavation rod. There is known a structure that extends to and opens and closes the collection port by rotating the operation rod (Patent Document 1).
Further, a configuration in which the operation rod is moved up and down to open and close the collection port is known (Patent Document 2).
Further, a configuration in which the operation rod is rotated and then moved upward to open the collection port is known (Patent Document 3).

Japanese Unexamined Patent Publication No. 2015-81424 Japanese Unexamined Patent Publication No. 2001-73360 Japanese Unexamined Patent Publication No. 2012-144914

Among the known examples, those described in JP-A-2015-81424 have a problem that the sealing property is low and foreign matter is mixed in the unsolidified liquid because the operation rod is rotated to open and close the collection port. There is.
Further, among the above-mentioned known examples, those described in JP-A-2001-73360 have a structure in which the collection port is opened by earth pressure, and therefore, when they are pushed into the accumulated earth and sand while being lowered to a desired depth. There is a problem that the collection port opens unintentionally.
Further, among the above-mentioned known examples, those described in Japanese Patent Application Laid-Open No. 2012-144914 have a structure in which the collection b is opened by the rotation of the operation rod and the spring pressure. It has to be pushed downward against the spring pressure, and there is a problem that it can be collected only at the bottom of the drilling hole.
The present invention has a simple structure, but enables reliable collection of an unsolidified liquid having a desired depth.

According to the first aspect of the present invention, the inner rod 10 formed of the hollow cylindrical member is vertically fitted to the inside of the outer rod 2 formed of the hollow cylindrical member, and the outer collection port 7 formed on the side surface of the outer rod 2 is fitted. , The inner collection port 15 formed on the side surface of the inner rod 10 is matched to collect the uncured liquid in the recovery chamber 14 of the inner rod 10, and the uncured liquid is collected between the outer rod 2 and the inner rod 10. This is an unsolidified liquid recovery device provided with an operation mechanism 20 that regulates the rise of the inner rod 10 due to the hydrostatic pressure of the above by a mechanical mechanism.
According to the second aspect of the present invention, the operating mechanism 20 causes the inner rod 10 to rise due to the hydrostatic pressure of the unsolidified liquid, and the inner rod 10 is restricted from rising and lifted by the restricting body of the operating mechanism 20. It is an unsolidified liquid recovery device configured to switch to.
According to the third aspect of the present invention, in the operation mechanism 20, the lower portion of the push rod 21 is fixedly attached to the upper portion of the inner rod 10, and the upper portion of the push rod 21 is projected upward from the upper portion of the outer rod 2 to casters. 23 is attached, a flat plate-shaped lower restrictor 24 and an upper regulator 28 are provided so as to intersect the vertical movement path of the caster 23, and the lower regulator 24 is provided with a lower passage port 26 through which the caster 23 passes. The upper restricting body 28 is provided with an upper passing port 30 through which the caster 23 passes, and the lower passing port 26 and the upper passing port 30 are provided in different phases to form an unsolidified liquid recovery device. be.
In the invention of claim 4, the lower passage port 26 provided in the lower restrictor 24 is provided with an arcuate passage groove 27 centered on the axis of the inner rod 10 and is connected to the upper regulator 28. An arcuate upper passage groove 31 centered on the axis of the inner rod 10 is continuously provided in the upper passage port 30, and casters 23 are provided on the lower surface of either the lower regulation body 24 or the upper regulation body 28. When the operation mechanism 20 is in contact with the inner rod 10, the raising of the inner rod 10 is restricted, and the rotation shaft 25 of the operation mechanism 20 is rotated so that the caster 23 passes through either the lower passage port 26 or the upper passage port 30. The unsolidified liquid recovery device is configured so that the rod 10 is restricted from rising by the operating mechanism 20 so as to be in a deregulated state.
In the invention of claim 5, the lower restricting body 24 is arranged and set at a predetermined distance from the upper part of the outer rod 2 so that the inner collecting port 15 is located below the outer collecting port 7, and the upper side thereof. The regulator 28 is an unsolidified liquid recovery device arranged and set at a predetermined interval above the lower regulator 24 so that the caster 23 abuts on the lower surface in a state where the inner sampling port 15 coincides with the outer sampling port 7. It is a thing.
In the invention of claim 6, the outer collection port 7 of the outer rod 2 and the inner collection port 15 of the inner rod 10 are opened in the crossing direction with respect to the axial centers of the outer rod 2 and the inner rod 10, and the outer rod 2 is provided with the outer collection port 7. On the inner peripheral surface, a plurality of sealing members 40 are arranged side by side at predetermined intervals in the vertical direction on both the upper and lower sides of the outer sampling port 7 to form an unsolidified liquid recovery device.
The invention according to claim 7 is an unsolidified liquid recovery device provided with a resistance plate 35 projecting in the radial direction with respect to the axial center of the outer rod 2 at a predetermined position on the outer peripheral surface of the outer rod 2.
According to the eighth aspect of the present invention, the inner rod 10 formed of the hollow cylindrical member is vertically fitted to the inside of the outer rod 2 formed of the hollow cylindrical member to form the unsolidified liquid collecting device 1, and the outer rod 2 is formed. Under the condition regulated by the operation mechanism 20 in which the inner sampling port 15 formed on the side surface of the inner rod 10 is located below the outer sampling port 7 formed on the side surface of the unsolidified liquid, the unsolidified liquid sampling device 1 wishes to collect the unsolidified liquid. It is lowered to a desired depth, the regulation of the operation mechanism 20 is released at the desired depth, and the inner rod 10 is raised by the hydrostatic pressure of the unsolidified liquid in the ground to form the inner sampling port 15 of the inner rod 10. In the same state as the outer sampling port 7 of the outer rod 2, the operating mechanism 20 regulates the rise of the inner rod 10 due to the hydrostatic pressure, and the unsolidified liquid flows into the recovery chamber 14, and then again. The regulation of the operation mechanism 20 is lifted, the inner rod 10 is raised by the hydrostatic pressure of the unsolidified liquid in the ground, and the inner sampling port 15 of the inner rod 10 is positioned above the outer sampling port 7 of the outer rod 2. The inner sampling port 15 of the inner rod 10 is closed by the inner peripheral surface of the outer rod 2, and in this state, the entire unsolidified liquid sampling device 1 is raised from the ground to recover the unsolidified liquid. It is a method.

In the invention of claim 1, since the inner rod 10 that rises by utilizing the hydrostatic pressure of the unsolidified liquid in the ground is regulated by the operation mechanism 20 of the mechanical mechanism, a drive mechanism (actuator) such as a drive cylinder or the like is used. The unsolidified liquid having a desired depth can be recovered without using the above method, the manufacturing cost and the working cost can be reduced, and the unsolidified liquid recovery work can be facilitated.
In the invention of claim 2, since the ascending of the inner rod 10 due to the hydrostatic pressure is switched between the ascending restricted state and the ascending restricting state of the inner rod 10 by the restricting body of the operating mechanism 20, the operating mechanism 20 can be simply configured. It is possible to reduce the manufacturing cost and working cost of the unsolidified liquid recovery device.
In the third aspect of the present invention, the flat plate-shaped lower restricting body 24 and the upper restricting body 28 intersecting the vertical movement path of the caster 23 of the push rod 21 on the upper part of the inner rod 10 are different in phase from each other. Since the operation mechanism 20 is configured by providing the 26 and the upper passage port 30, it is possible to switch between the ascending regulation release state of the operating mechanism 20 and the ascending regulation releasing state of the operating mechanism 20 with this simple configuration.
In the invention of claim 4, the lower passage port 26 and the upper passage port 30 of the lower regulation body 24 and the upper regulation body 28 have an arcuate lower passage groove 27 centered on the axis of the inner rod 10, respectively. Since the upper passage groove 31 is continuously provided, it is possible to switch between the ascending regulation release state of the operating mechanism 20 and the ascending restricting state of the operating mechanism 20.
In the invention of claim 5, since the lower control body 24 is arranged and set so that the inner collection port 15 is located below the outer collection port 7, it is possible to reliably close the inner collection port 15 to a desired depth. In addition, since the upper restricting body 28 is arranged so that the caster 23 abuts on the lower surface in a state where the inner sampling port 15 coincides with the outer sampling port 7, the outer sampling port 7 and the inner sampling port 15 are arranged. It can be reliably matched and retained.
In the invention of claim 6, the outer collection port 7 of the outer rod 2 and the inner collection port 15 of the inner rod 10 are opened in the crossing direction with respect to the axial center of the outer rod 2 and the inner rod 10, and the inner side of the outer rod 2 is opened. Since a plurality of sealing members 40 are arranged side by side on the peripheral surface on both the upper and lower sides of the outer sampling port 7 at predetermined intervals in the vertical direction, sufficient sealing performance can be ensured, and cement milk is added to the collected unsolidified liquid. And water can be prevented from entering.
In the invention of claim 7, since the resistance plate 35 projecting in the radial direction with respect to the axial center of the outer rod 2 is provided at a predetermined position on the outer peripheral surface of the outer rod 2, the outer rod 2 is held in a fixed state. The lower restrictor 24 and the upper regulator 28 can be rotated, and the operation mechanism 20 can be reliably switched.
In the invention of claim 8, since the sample of the unsolidified liquid can be recovered by utilizing the hydrostatic pressure of the unsolidified liquid in the ground, a drive mechanism (actuator) such as a drive cylinder is not required, and the manufacturing cost and work are performed. The cost can be reduced, and the unsolidified liquid recovery work can be facilitated.

The side view which shows an example of the state before the work start of the unsolidified liquid recovery apparatus. Front view of the unsolidified liquid recovery device. A cross-sectional view of the ascending restricted state of the operating mechanism and a plan view of the lower and upper restricting bodies of the operating mechanism. A cross-sectional view of the matching state between the outer sampling port and the inner sampling port, and a plan view of the lower and upper regulators of the operating mechanism. A cross-sectional view of a state in which the inner collection port is raised from the outer collection port, and a plan view of the lower control body and the upper control body of the operation mechanism. A cross-sectional view of the recovery state of the unsolidified liquid recovery device and a plan view of the lower control body and the upper control body of the operation mechanism.

Explaining one embodiment of the present invention with a figure, 1 is an unsolidified liquid sampling device, and the unsolidified liquid sampling device 1 is a root hardening liquid and a pile peripheral liquid injected into the ground in the implementation of the ready-made pile embedding method. An unsolidified liquid (sample) mixed with soil is collected. The unsolidified liquid sampling device 1 has an outer rod 2 formed of a vertically long hollow cylindrical member, the outer rod 2 forms an air chamber 4 in the outer cylindrical portion, and the lower end of the outer cylindrical portion 3 is opened to open the lower end. It is formed in the portion 5, and the upper portion of the outer cylindrical portion 3 is closed by the upper plate portion 6.

The unsolidified liquid collecting device 1 is formed to have a predetermined length in the vertical direction, and an outer sampling port 7 for collecting the unsolidified liquid in the ground is formed at a predetermined position in the vertical direction of the outer cylindrical portion 3. The outer sampling port 7 is opened in the lateral direction which is the crossing direction with respect to the axial direction of the outer rod 2.
A vertically long inner rod 10 is tightly fitted to the outer rod 2 so as to be slidable up and down. The inner rod 10 also forms the inner cylindrical portion 11 by the hollow cylindrical member. The lower end of the inner cylindrical portion 11 is closed by the lower closing portion 12, the upper portion of the inner cylindrical portion 11 is closed by the upper closing portion 13, and a recovery chamber 14 for collecting the unsolidified liquid is formed in the inner cylindrical portion 11. .. The inner rod 10 is formed with a lateral inner collection port 15 communicating with the collection chamber 14, and the collection chamber 14 of the inner rod 10 has an inner cylindrical portion 11, a lower closing portion 12, and an upper side except for the inner collection port 15. It is formed in a closed state by the closing portion 13.

Then, the uncured liquid collecting device 1 raises the inner rod 10 having the recovery chamber 14 in a closed state by the hydrostatic pressure of the uncured liquid in the ground, and raises the inner collecting port 15 of the inner rod 10 to the outer rod. The uncured liquid is collected in the recovery chamber 14 of the inner rod 10 so as to coincide with the outer sampling port 7 of 2, and then the inner rod 10 is further raised by the hydrostatic pressure of the uncured liquid in the ground to further raise the outer side. The inner sampling port 15 of the inner rod 10 is closed by the inner circumference of the rod 2, and in this state, the entire unsolidified liquid collecting device 1 is raised from the ground to collect the unsolidified liquid.
That is, the hydrostatic pressure that raises the inner rod 10 is the pressure acting on the stationary liquid, the pressure acting on one point in the liquid has the same magnitude regardless of the direction, and the magnitude is the density of the liquid.・ Equal to the product of gravity acceleration and depth.

The side surface and the lower surface of the inner rod 10 are in contact with the uncured liquid, and the pressure acting on the side surface of the inner rod 10 acts on the entire circumference to balance the forces, so that the increase of the inner rod 10 is not affected. However, since the upper surface of the inner rod 10 is in contact with the air in the air chamber 4 of the outer rod 2, the hydrostatic pressure does not act, and the density of the unsolidified liquid acting on the lower surface of the inner rod 10 and the outer rod 2 The force acts upward due to the difference in the density of the air (atmosphere) in the air chamber 4.
As a result, the position of the unsolidified liquid sampling device 1 becomes deeper, so that the upward force of the hydrostatic pressure increases, and the hydrostatic pressure is constantly increased so as to increase the inner rod 10 which can move up and down with respect to the outer rod 2. It acts to raise the inner rod 10 even after the unsolidified liquid is recovered in the recovery chamber 14.

An operating mechanism 20 that regulates the rise of the inner rod 10 due to this hydrostatic pressure and releases the regulation to match the inner sampling port 15 and the outer sampling port 7 and then allows the inner rod 10 to rise further. It is provided between the outer rod 2 and the inner rod 10.
The operation mechanism 20 attaches the lower part of the push rod 21 to the upper part of the inner rod 10 in a fixed state. The upper part of the push rod 21 penetrates the upper plate portion 6 of the outer rod 2 and protrudes upward, and the caster 23 is attached to the upper part of the push rod 21. The caster 23 is brought into contact with the lower surface of the lower regulating body 24 of the operating mechanism 20 to regulate the rise of the inner rod 10 due to the hydrostatic pressure.

The lower restricting body 24 is fixed to the rotating shaft 25 of the operating mechanism 20, and the rotating shaft 25 is freely attached to the upper plate portion 6 of the outer rod 2 only in rotation. The lower restricting body 24 is provided with a lower passage port 26 that allows the caster 23 to move upward, and the lower passage port 26 is provided with a passage groove 27 that allows the push rod 21 to move upward in a communicating state. An upper regulator 28 is provided on the rotating shaft 25 at an upper position at a predetermined interval of the lower regulator 24.
The upper regulator 28 is set so that when the caster 23 comes into contact with the lower surface thereof, the inner sampling port 15 of the inner rod 10 coincides with the outer sampling port 7 of the outer rod 2.
Therefore, in the operation mechanism 20, when the caster 23 of the push rod 21 passes through the lower passage port 26 of the lower restrictor 24 and the caster 23 comes into contact with the lower surface of the upper regulator 28, the outer collection of the outer rod 2 is performed. The inner collection port 15 of the inner rod 10 is aligned with the port 7, and the unsolidified liquid M (FIG. 4) is collected from the outer collection port 7 and the inner collection port 15 into the collection chamber 14.

The upper restricting body 28 is provided with an upper passing port 30 that allows the caster 23 to move upward, and the upper passing port 30 is provided with an upper passing groove 31 that regulates the allowing the upward movement and the downward movement of the push rod 21 in a communicating state. ..
Therefore, when the caster 23 of the push rod 21 passes through the upper passage port 30 of the upper restrictor 28 and the caster 23 moves above the upper regulator 28, the operation mechanism 20 is connected to the outer collection port 7 of the outer rod 2. The inner sampling port 15 of the inner rod 10 that had been used has come off above the outer sampling port 7, and the inner sampling port 15 is blocked by the inner peripheral surface of the outer rod 2. In this state, the entire unsolidified liquid sampling device 1 is removed from the ground. Raise and collect the uncured liquid.
In this case, the lower passage port 26 of the lower regulation body 24 and the upper passage port 30 of the upper regulation body 28 have different phases in a plan view, and the caster 23 that has passed through the lower passage port 26 is always the upper regulation body. It is configured to abut on the lower surface of 28.

Further, when the inner sampling port 15 is closed by the inner peripheral surface of the outer rod 2, the rotating shaft 25 is reversed in this state, the caster 23 is retracted from above the upper passing port 30 of the upper restricting body 28, and the upper restricting body 28 It is moved upward on the upper surface, and in this state, the entire unsolidified liquid sampling device 1 is raised from the ground, and the entire unsolidified liquid sampling device 1 is supported by the contact between the upper regulator 28 and the caster 23.
Further, an air hole 33 communicating with the outside air is provided at the center of the rotating shaft 25, and the air pressure in the air chamber 4 of the outer rod 2 is set to atmospheric pressure, whereby the inner rod 10 is set by the pressure difference from the hydrostatic pressure. Raise it.

Further, the lower restricting body 24 and the upper restricting body 28 are configured to be integrally rotated with respect to the caster 23 (outer rod 2) by the rotating shaft 25, and the rotating shaft 25 is formed on the upper plate portion 6 of the outer cylindrical portion 3. It is installed freely only in rotation.
In the present embodiment, a resistance plate 35 is provided at a predetermined position on the outer peripheral surface of the outer rod 2 so as to project in the radial direction with respect to the axis of the outer rod 2, and the contact resistance between the resistance plate 35 and the uncured liquid causes the outer side. The rod 2 and the inner rod 10 are fixed by taking a reaction force with respect to the rotating shaft 25.

Stoppers 38 are provided in the lower passage port 26 and the upper passage port 30 of the lower regulation body 24 and the upper regulation body 28, respectively, and the lower passage port 26 and the upper passage port of the lower regulation body 24 and the upper regulation body 28 are provided. When the casters 23 match each of the 30s, the rotation of the rotating shaft 25 is stopped.
Therefore, the lower passage port 26, the upper passage port 30, and the caster 23 can be surely matched, and the regulation of the operation mechanism 20 can be surely released.
A plurality of sealing members 40 are arranged side by side on the inner peripheral surface of the outer cylindrical portion 3 of the outer rod 2 at predetermined intervals in the vertical direction. A plurality of seal members 40 are arranged side by side on both the upper and lower sides of the outer sampling port 7.

The means for collecting the unsolidified liquid in the ground by the unsolidified liquid collecting device 1 is arbitrary, but an example is shown below. Reference numeral 45 denotes a base machine installed on the ground. The earth auger 47 is vertically and vertically attached to the mast 46 of the base machine 45, and the rotating shaft 25 of the unsolidified liquid sampling device 1 is attached to the lower part of the excavation rod 48 of the earth auger 47. Install. The earth auger 47 is configured to rotatably drive the excavation rod 48 in the forward and reverse directions, whereby the rotating shaft 25 of the unsolidified liquid collecting device 1 is configured to rotate forward and reverse in the ground to collect the unsolidified liquid.

(Action of Embodiment)
The present invention has the above-mentioned configuration, and the base machine 45 is installed at a predetermined position on the ground and cement milk or the like is injected into the ground to improve the ground or construct piles.
In the uncured liquid collecting device 1, the inner rod 10 formed by the hollow cylindrical member is fitted inside the outer rod 2 formed by the hollow cylindrical member, and the uncured liquid is placed between the outer rod 2 and the inner rod 10. Since the operation mechanism 20 is provided to regulate the rise of the inner rod 10 due to the hydrostatic pressure by a mechanical mechanism, the inner collection port 15 of the inner rod 10 is provided below the outer collection port 7 of the outer rod 2 by the operation mechanism 20. In the positioned restricted state, the earth auger 47 is lowered with respect to the mast 46, and the unsolidified liquid collecting device 1 is lowered to a desired depth for collecting the unsolidified liquid.

After lowering the unsolidified liquid sampling device 1 to a desired depth, the restriction of the operation mechanism 20 is released, and the inner rod 10 is raised by the hydrostatic pressure of the unsolidified liquid in the ground to raise the inner rod 10 to the inner sampling port of the inner rod 10. The unsolidified liquid is allowed to flow into the recovery chamber 14 by aligning the 15 with the outer collection port 7 of the outer rod 2.
Next, when the uncured liquid flows into the recovery chamber 14, the regulation of the operation mechanism 20 is released again, and the inner rod 10 is raised by the hydrostatic pressure of the uncured liquid in the ground, and the inner rod 10 is raised. The inner sampling port 15 of the inner rod 2 is positioned above the outer sampling port 7 of the outer rod 2, and the inner sampling port 15 of the inner rod 10 is closed by the inner peripheral surface of the outer rod 2.
In this state, the earth auger 47 is raised to raise the entire unsolidified liquid collecting device 1 from the ground, and the unsolidified liquid is recovered.

Therefore, since the inner rod 10 is configured by the operation mechanism 20 that regulates the inner rod 10 that rises by utilizing the hydrostatic pressure of the unsolidified liquid in the ground by a mechanical mechanism, the drive cylinder or the like is driven. The unsolidified liquid at a desired depth can be recovered without using a mechanism (actuator) or the like, the manufacturing cost and the work cost can be reduced, and the unsolidified liquid recovery work can be facilitated.
Further, since the inner rod 10 is raised by utilizing the hydrostatic pressure of the unsolidified liquid in the ground to open and close the inner sampling port 15 of the inner rod 10, not only the bottom of the excavation hole but also the intermediate desired It is possible to recover the unsolidified liquid in the part.

Then, in the unsolidified liquid collecting device 1, the inner rod 10 formed of the hollow cylindrical member is fitted to the inside of the outer rod 2 formed of the hollow cylindrical member so as to be slidable up and down, and the outer rod 2 and the inner rod 10 are fitted. Since the operation mechanism 20 for restricting the rise of the inner rod 10 due to the hydrostatic pressure of the unsolidified liquid is provided between the above and the above, the unsolidified liquid having a desired depth is recovered without using a drive mechanism such as a drive cylinder. be able to.
Further, since the operation mechanism 20 releases the restriction on the rise of the inner rod 10 and makes the inner collection port 15 of the outer rod 2 and the outer collection port 7 of the inner rod 10 coincide with each other, the drive mechanism of the drive cylinder or the like is also in this respect. The unsolidified liquid having a desired depth can be recovered without using.

Further, since the operation mechanism 20 releases the restriction on the rise of the inner rod 10 after the unsolidified liquid is recovered, the outer sampling port 7 of the inner rod 10 can be closed in a sealed state by the inner peripheral surface of the outer rod 2 and recovered. It is possible to prevent cement milk, water and the like from being mixed into the uncured liquid, and it is possible to improve the detection accuracy of the uncured liquid.
That is, the air chamber 4 was formed in the outer cylindrical portion 3 of the outer rod 2, the lower end of the outer cylindrical portion 3 was opened to form the lower end opening 5, and the recovery chamber 14 was formed inside the outer rod 2. Since the inner rod 10 is tightly fitted so as to be slidable up and down, when the restriction of the operation mechanism 20 is released, the inner collection port of the inner rod 10 located below the outer collection port 7 of the outer rod 2 is released. 15 rises due to the hydrostatic pressure of the unsolidified liquid of the inner rod 10, and as described above, the inner collection port 15 of the inner rod 10 coincides with the outer collection port 7 of the outer rod 2 to collect the inner rod 10. The unsolidified liquid can flow into the chamber 14.

Then, when the regulation of the operation mechanism 20 is further lifted after the recovery of the uncured liquid, the inner rod 10 further rises due to the hydrostatic pressure of the uncured liquid, and the inner sampling port 15 of the inner rod 10 is the outer side of the outer rod 2. Positioned above the sampling port 7, the inner sampling port 15 is closed by the inner peripheral surface of the outer rod 2, so that the outer sampling port 7 of the inner rod 10 is sealed by the inner peripheral surface of the outer rod 2. It is possible to prevent the unsolidified liquid that can be closed and recovered from being mixed with the unsolidified liquid other than the target depth, and it is possible to improve the detection accuracy of the unsolidified liquid.
In this case, since a plurality of sealing member sealing members 40 are juxtaposed on the inner peripheral surface of the outer rod 2 at predetermined intervals in the vertical direction, the inner sampling port 15 of the inner rod 10 collects the unsolidified liquid. Both before and after recovery, it is blocked by the inner peripheral surface of the outer rod 2, and it is possible to prevent foreign matter from being mixed in the recovered unsolidified liquid.

Further, since the inner sampling port 15 of the inner rod 10 that moves up and down with respect to the outer rod 2 is closed by the sealing member 40, the sealing performance can be improved in this respect as well.
In the operation mechanism 20, the lower part of the push rod 21 is fixedly attached to the upper part of the inner rod 10, the upper part of the push rod 21 is projected upward from the upper part of the outer rod 2, and the caster 23 is attached, and the caster 23 moves up and down. The lower regulator 24 and the upper regulator 28 are provided so as to intersect the road, and the lower regulator 24 and the upper regulator 28 are out of phase with each other and the lower passage port 26 and the upper passage port through which the caster 23 passes. Since 30 is provided and configured, first, when the rotary shaft 25 of the unsolidified liquid sampling device 1 is attached to the lower part of the excavation rod 48 of the earth auger 47 of the base machine 45, the unsolidified liquid sampling device 1 becomes the outer rod 2 The inner rod 10 descends by its own weight with respect to the caster 23, and the caster 23 is positioned below the lower surface of the lower restricting body 24 of the operating mechanism 20, and the operating mechanism 20 regulates the ascending of the inner rod 10.

In this state, the earth auger 47 is lowered with respect to the mast 46, and the unsolidified liquid collecting device 1 is lowered to a desired depth for collecting the unsolidified liquid.
After lowering the unsolidified liquid sampling device 1 to a desired depth, the rotating shaft 25 of the operating mechanism 20 is rotated (for example, forward rotation), and the lower passing port 26 of the lower restricting body 24 of the operating mechanism 20 is connected to the caster 23. When positioned upward, the operating mechanism 20 allows the casters 23 to rise, and as a result, the inner rod 10 starts to rise due to the hydrostatic pressure of the unsolidified liquid in the ground, and the casters 23 are the upper restrictors of the operating mechanism 20. The ascending of the inner rod 10 stops in contact with the lower surface of the 28, and the operating mechanism 20 restricts the ascending of the inner rod 10 further.
When the ascent of the inner rod 10 is stopped, the inner collection port 15 of the inner rod 10 coincides with the outer collection port 7 of the outer rod 2, so that the unsolidified liquid flows into the collection chamber 14.

Next, when the rotating shaft 25 of the operating mechanism 20 is rotated in the reverse direction and the upper passing port 30 of the upper restricting body 28 of the operating mechanism 20 is positioned above the caster 23, the ascending restriction of the inner rod 10 by the operating mechanism 20 is released. The inner rod 10 starts to rise further due to the hydrostatic pressure of the unsolidified liquid in the ground, and the caster 23 passes through the upper passage port 30 of the upper regulator 28 of the operation mechanism 20 and is above the upper surface of the upper regulator 28. Located in.
When the caster 23 is located above the upper surface of the upper restricting body 28 of the operating mechanism 20, the inner sampling port 15 of the inner rod 10 is located above the outer sampling port 7 of the outer rod 2, and the inner sampling port 15 is the outer rod 2. It becomes a state of being blocked by the inner peripheral surface of.
In this state, if the earth auger 47 is raised, the entire unsolidified liquid collecting device 1 is raised from the ground, and the lower obstruction portion 12 of the inner rod 10 is removed, the unsolidified liquid can be recovered from the recovery chamber 14.

As described above, since the operation mechanism 20 is composed of a pair of upper and lower lower restrictors 24, an upper restrictor 28, and casters 23 attached to the inner rod 10 side, a mechanism for mechanically restricting the ascent of the inner rod 10. Is easy to configure, and moreover, the rotation shaft 25 of the operation mechanism 20 is simply rotated in the forward and reverse directions, so that the operation is easy.
Further, in the inner rod 10, the lower end of the inner cylindrical portion 11 formed by the hollow cylindrical member is closed by the lower closing portion 12 and the upper portion of the inner cylindrical portion 11 is closed by the upper closing portion 13 to form a recovery chamber recovery chamber 14 inside. Therefore, the collection chamber 14 of the inner rod 10 is sealed by the inner cylindrical portion 11, the lower closing portion 12 and the upper closing portion 13 except for the inner sampling port 15, and the inner rod 10 rises due to the hydrostatic pressure. The certainty of action can be improved.

Further, since the air hole 33 communicating with the outside air is provided at the center of the rotating shaft 25, the air pressure in the air chamber 4 of the outer rod 2 is set to atmospheric pressure, whereby the pressure difference from the hydrostatic pressure causes the inner rod. Raise 10
Further, the operation mechanism 20 simply provides the lower passage port 26, the upper passage port 30, the passage groove 27, and the upper passage groove 31 on the pair of upper and lower lower regulation bodies 24 and the upper regulation body 28, respectively, to provide the caster 23. Since the ascent can be regulated and deregulated, the configuration of the operation mechanism 20 can be simply realized.

Further, since the operation mechanism 20 is configured by attaching the casters 23 to the upper portion of the pair of push rods 21 having the lower portion attached to the upper portion of the inner rod 10 in a fixed state, the lower restrictor 24 or the upper regulator 28 is configured. With the casters 23 in contact with the lower surface, the rotational resistance of the lower regulator 24 or the upper regulator 28 can be reduced, and the operation mechanism 20 can be smoothly operated.
Further, the operation mechanism 20 is set so that when the caster 23 comes into contact with the lower surface of the upper restricting body 28, the inner sampling port 15 of the inner rod 10 coincides with the outer sampling port 7 of the outer rod 2. The matching operation between the outer sampling port 7 of the rod 2 and the inner sampling port 15 of the inner rod 10 can be reliably performed, and the matched state can be reliably maintained.

Similarly, since the operating mechanism 20 provides the upper restricting body 28 with the upper passing port 30 that allows the caster 23 to move upward, the inner collecting port 10 of the inner rod 10 that matches the outer collecting port 7 of the outer rod 2 is collected. The port 15 is detached from the outer collection port 7, and the inner collection port 15 can be reliably closed by the inner peripheral surface of the outer rod 2.
In this case, since the lower passage port 26 of the lower regulation body 24 and the upper passage port 30 of the upper regulation body 28 have different phases in a plan view, the caster 23 that has passed through the lower passage port 26 must be used. It abuts on the lower surface of the upper regulator 28 and maintains a state of coincidence between the outer sampling port 7 of the outer rod 2 and the inner sampling port 15 of the inner rod 10.
Further, since the lower restricting body 24 and the upper regulating body 28 of the operation mechanism 20 are configured to rotate integrally with respect to the caster 23 (outer rod 2) by the rotation shaft 25, excavation by the earth auger 47. The operation mechanism 20 can be regulated and deregulated simply by rotating the rod 48 in the forward and reverse directions.

Since the inner sampling port 15 of the inner rod 10 forms the inner sampling port 15 opened in the lateral direction in the inner cylindrical portion 11 of the inner rod 10, it is compared with the inner sampling port 15 opened in the vertical direction. It is possible to easily secure the shielding property.
Since a resistance plate 35 projecting in the radial direction with respect to the axis of the outer rod 2 is provided at a predetermined position on the outer peripheral surface of the outer rod 2, the outer side is affected by the contact resistance between the resistance plate 35 of the outer rod 2 and the ground. The rod 2 and the inner rod 10 can be fixed by taking a reaction force with respect to the rotating shaft 25, and the operation of the operation mechanism 20 for regulation and deregulation can be reliably performed.

1 ... Unsolidified liquid sampling device, 2 ... Outer rod, 3 ... Outer cylindrical part, 4 ... Air chamber, 5 ... Lower end opening, 7 ... Outer sampling port, 10 ... Inner rod, 11 ... Inner cylindrical part, 12 ... Lower Side obstruction, 13 ... upper obstruction, 14 ... collection chamber, 15 ... inner collection port, 20 ... operation mechanism, 21 ... push rod, 22 ... upper plate, 23 ... caster, 24 ... lower regulator, 25 ... Rotating shaft, 26 ... Lower passage port, 27 ... Lower passage groove, 28 ... Upper regulation body, 30 ... Upper passage port, 31 ... Upper passage groove, 33 ... Air hole, 35 ... Resistance plate, 38 ... Stopper, 40 ... seal member, 45 ... base machine, 46 ... mast, 47 ... earth auger, 48 ... excavation rod.

Claims (8)

The inner rod 10 formed by the hollow cylindrical member is vertically fitted to the inside of the outer rod 2 formed by the hollow cylindrical member, and the outer collection port 7 formed on the side surface of the outer rod 2 is fitted to the side surface of the inner rod 10. The formed inner sampling port 15 is matched to collect the uncured liquid in the recovery chamber 14 of the inner rod 10, and the inner rod between the outer rod 2 and the inner rod 10 is formed by the hydrostatic pressure of the uncured liquid. An unsolidified liquid recovery device provided with an operation mechanism 20 that regulates the rise of 10 by a mechanical mechanism. In claim 1, the operation mechanism 20 changes the rise of the inner rod 10 due to the hydrostatic pressure of the unsolidified liquid into an ascending restricted state and an ascending regulation released state of the inner rod 10 by the restricting body of the operating mechanism 20. Unsolidified liquid recovery device configured to switch. In claim 1 or 2, the operating mechanism 20 attaches the lower portion of the push rod 21 to the upper portion of the inner rod 10 in a fixed state, and the upper portion of the push rod 21 projects upward from the upper portion of the outer rod 2. A flat plate-shaped lower restrictor 24 and an upper regulator 28 are provided so as to intersect the vertical movement path of the caster 23, and the lower regulator 24 has a lower passage port through which the caster 23 passes. An unsolidified liquid recovery device in which 26 is provided, an upper passage port 30 through which the caster 23 passes is provided in the upper regulation body 28, and the lower passage port 26 and the upper passage port 30 are provided in different phases. In claim 3, an arcuate passage groove 27 centered on the axis of the inner rod 10 is continuously provided in the lower passage port 26 provided in the lower regulation body 24, and is provided in the upper regulation body 28. An arc-shaped upper passage groove 31 centered on the axis of the inner rod 10 is continuously provided in the upper passage port 30, and the caster 23 abuts on the lower surface of either the lower regulator 24 or the upper regulator 28. Then, assuming that the operation mechanism 20 is in a state where the inner rod 10 is restricted from rising and the rotation shaft 25 of the operation mechanism 20 is rotated so that the caster 23 passes through either the lower passage port 26 or the upper passage port 30, the operation mechanism 20 is set. An unsolidified liquid recovery device configured so that the restriction on the rise of the rod 10 by 20 is released. In claim 3, the lower restricting body 24 is arranged and set at a predetermined distance from the upper part of the outer rod 2 so that the inner collecting port 15 is located below the outer collecting port 7, and the upper restricting body is set. 28 is an unsolidified liquid recovery device arranged and set at a predetermined interval above the lower regulator 24 so that the caster 23 abuts on the lower surface in a state where the inner sampling port 15 coincides with the outer sampling port 7. In any one of claims 1 to 5, the outer collection port 7 of the outer rod 2 and the inner collection port 15 of the inner rod 10 intersect with the axial center of the outer rod 2 and the inner rod 10. An unsolidified liquid recovery device in which a plurality of sealing members 40 are juxtaposed on the inner peripheral surface of the outer rod 2 at predetermined intervals in the vertical direction on both upper and lower sides of the outer sampling port 7. In any one of claims 1 to 6, the unsolidified liquid is recovered by providing a resistance plate 35 projecting in the radial direction with respect to the axis of the outer rod 2 at a predetermined position on the outer peripheral surface of the outer rod 2. Device. The inner rod 10 formed of the hollow cylindrical member is vertically fitted to the inside of the outer rod 2 formed of the hollow cylindrical member to form the unsolidified liquid collecting device 1, and the outer collecting formed on the side surface of the outer rod 2 is formed. Under the regulated state by the operation mechanism 20 in which the inner sampling port 15 formed on the side surface of the inner rod 10 is located below the port 7, the unsolidified liquid sampling device 1 is lowered to a desired depth for collecting the unsolidified liquid. The regulation of the operation mechanism 20 is released at a desired depth, and the inner rod 10 is raised by the hydrostatic pressure of the unsolidified liquid in the ground, so that the inner sampling port 15 of the inner rod 10 and the outer sampling port of the outer rod 2 are raised. In this state, the operating mechanism 20 regulates the rise of the inner rod 10 due to the hydrostatic pressure to allow the uncured liquid to flow into the recovery chamber 14, and then the regulation of the operating mechanism 20 is lifted again. Then, the inner rod 10 is raised by the hydrostatic pressure of the unsolidified liquid in the ground, the inner sampling port 15 of the inner rod 10 is positioned above the outer sampling port 7 of the outer rod 2, and the inner side of the inner rod 10 is set. A method for recovering an unsolidified liquid by closing the collection port 15 with the inner peripheral surface of the outer rod 2 and raising the entire unsolidified liquid collecting device 1 from the ground in this state to recover the unsolidified liquid.

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