JP2017025520A - Soil sampler and soil sampling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil sampler capable of reliably collecting a soil sample at a predetermined depth, and a soil sampling device.SOLUTION: A soil sampler 1 includes a cylinder member 10 which has a tip opened and which has a side surface provided with an exhaust port 13, and a plate member 11 which is provided within the cylinder member 10, which has one end protruded from an opening, which has the other end connected to a bottom 14 of a back end of the cylinder member 10 and which is spirally constituted in a longitudinal direction of the cylinder member 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a soil sampler and a soil sampler.

  In general, in the investigation of the soil quality of the foundation ground of a building structure, after collecting soil at a predetermined depth as a sample, the composition of sand and clay in the collected soil sample is examined.

  For example, Patent Document 1 discloses a sample soil collector having a storage container and a cylindrical opening / closing tube that is rotatably fitted to the outer peripheral side of the storage container and is pushed into the soil while being rotated. Yes. Since this open / close cylinder includes a resistance plate, it opens and closes according to the rotation direction of the sample soil collector. Therefore, when the rotation direction of the sample soil collector is changed at the timing when the sample soil collector reaches a predetermined depth, the open / close cylinder is closed, so that a soil sample at a predetermined depth can be collected.

JP 2013-237994 A

  In the sample soil collector disclosed in Patent Document 1, when sand is sandwiched between the storage container and the open / close cylinder, the open / close cylinder is not opened and closed, and a soil sample can be appropriately collected. There is a problem that cannot be done.

  The present invention has been made paying attention to such a problem, and an object thereof is to provide a soil sampling device and a soil sampling device that can reliably collect a soil sample.

  The soil sampler of one embodiment of the present invention is a soil sampler that collects soil, and is provided with a cylindrical member having a distal end opened and a discharge port provided on a side surface thereof, the cylindrical member being provided in the cylindrical member, and one end being the opening. The other end is connected to the bottom of the rear end of the tubular member, and has a plate member that is spirally formed along the longitudinal direction of the tubular member.

  According to this aspect, when the soil sampler is rotated and pushed into the soil, the soil taken in from the opening at the tip of the cylindrical member is guided by the spirally configured plate member and accommodated in the cylindrical member. . When the soil sampler descends in the soil and the soil is further taken into the cylindrical member from the opening, the soil contained in the rear end of the cylindrical member is pushed out from the discharge port. In this manner, when the soil sampler is lowered while rotating to a predetermined depth, a soil sample at a predetermined depth is accommodated in the cylindrical member.

  Then, after the soil collector is lowered to a predetermined depth, the soil collector is raised to the ground, and the soil sample accommodated in the cylindrical member is taken out. While the soil sampler is raised, the soil sample contained in the cylinder member is held by the inner surface of the cylinder member and the plate member, so that the soil sample is prevented from falling from the opening at the tip of the soil sampler. be able to. Therefore, the soil sampler of a predetermined depth can be reliably collected by the soil sampler.

It is a perspective view of the soil sampling device of a 1st embodiment of the present invention. It is a side view of the front-end | tip of the soil sampling device of 1st Embodiment. It is a partial cross section figure of the rear end of the soil sampling device of a 1st embodiment. It is the schematic of the soil sampling apparatus using the soil sampling device of 1st Embodiment. It is a perspective view of the soil sampler of 2nd Embodiment of this invention.

(First embodiment)
FIG. 1 is a perspective view of a soil sampler 1 according to a first embodiment of the present invention.

  The soil sampling device 1 includes a cylindrical member 10 and a plate member 11. The tubular member 10 and the plate member 11 are both made of iron and have a certain rigidity and heat resistance. In this figure, the left end of the soil sampler 1 in the longitudinal direction is referred to as the front end, and the right end of the drawing is referred to as the rear end.

  The cylindrical member 10 is a cylindrical member, and an opening 12 is provided at the tip, and a discharge port 13 is provided on a side surface. Hereinafter, the solid part at the rear end of the tubular member 10 is referred to as a bottom portion 14. In addition, the cylinder member 10 may be a cylinder having a polygonal cross section instead of a cylindrical member.

  The discharge port 13 is formed from a position on the rear end side with respect to the midpoint in the longitudinal direction of the cylindrical member 10 to an end face (tip face) on the front end side of the bottom portion 14. A pair of discharge ports 13 is provided on the side surface of the cylinder member 10 via a plate member 11 provided in the cylinder member 10. That is, the two discharge ports 13 are provided so as to face each other.

  The bottom portion 14 has a structure having a two-sided width having two planes parallel to each other and facing each other. That is, the side surface of the bottom portion 14 includes two opposing flat surfaces and two curved surfaces having the same curvature as the cylindrical portion of the cylindrical member 10. A welding hole 15 is formed in a plane constituting the two-surface width of the bottom portion 14. A screw portion 16 is provided on an end surface (rear end surface) on the rear end side of the bottom portion 14.

  The plate member 11 is formed in a spiral shape in the longitudinal direction of the tubular member 10 in the tubular member 10. The width of the plate member 11 is slightly smaller than the inner diameter of the cylindrical member 10.

  The plate member 11 has a front end (one end) protruding from the opening 12 of the cylindrical member 10 and a rear end (other end) welded to the front end surface of the bottom portion 14 of the cylindrical member 10. The plate member 11 is welded to the cylindrical member 10 at the edges of the opening 12 and the discharge port 13.

  FIG. 2 is a side view of the tip of the soil sampling device 1.

  According to this figure, the cylindrical member 10 has the taper part 21 comprised so that it might reduce in diameter from the side surface to the opening part 12 in a front-end | tip part.

  The tip of the plate member 11 protruding from the opening 12 is configured as a sharp portion 22 configured with an acute angle of 45 degrees. Note that the sharp portion 22 is formed in a spiral shape.

  FIG. 3 is a partial cross-sectional view around the rear end including the bottom 14 of the soil sampler 1. On the upper side of the bottom 14 in the drawing and the lower side of the drawing, a plane that forms a two-sided width is provided.

  A groove 31 is provided on the tip surface of the bottom portion 14 so as to pass through the center of the tip surface and be parallel to the discharge port 13. The width of the groove 31 is equal to the thickness of the plate member 11. Note that the rear end of the plate member 11 is formed in a flat plate shape instead of a spiral shape by the depth of the groove 31. A flat plate-like portion at the rear end of the plate member 11 is welded to the bottom portion 14 while being inserted into the groove 31.

  Further, a slope portion 32 is provided on both the one surface and the other surface of the rear end surface of the plate member 11 toward the rear end portion of the discharge port 13. The slope part 32 is comprised by the welding member at the time of welding the plate member 11 with the bottom part 14. As shown in FIG. The slope portion 32 may be configured by cutting out a part of the tip surface of the bottom portion 14.

  The bottom portion 14 is provided with a screw hole 33 on the rear end surface. The screw hole 33 is provided in a female screw shape that is screwed with the screw portion 16. The screw hole 33 may be a cylindrical opening having a diameter larger than that of the screw portion 16. In such a case, the screw part 16 inserted into the screw hole 33 is welded to the bottom part 14.

  Further, a welding hole 15 is provided in the bottom portion 14 so as to penetrate the center of the cylindrical member 10. The welding hole 15 communicates with the screw hole 33.

  The screw portion 16 is welded to the bottom portion 14 in the welding hole 15 while being screwed into the screw hole 33. In FIG. 3, a welding member 34 for welding the bottom portion 14 and the screw portion 16 is shown.

  In addition, the soil sampling device 1 can be manufactured as follows, for example. First, a flat plate to be the plate member 11 is inserted into the tubular member 10 from the opening 12, the rear end of this flat plate is inserted into the groove 31 of the bottom portion 14 of the tubular member 10, and the flat plate and the bottom portion 14 are welded. Then, rotational torque about the axis of the cylindrical member 10 is applied to the tip of the plate member 11 to rotate it by a predetermined number of turns. After forming the spiral plate member 11 in this way, the plate member 11 is welded to the cylindrical member 10.

  FIG. 4 is a diagram illustrating a soil collection device 40 using the soil collection device 1.

  The soil sampling device 40 includes a soil sampling device 1 and an excavator 41.

  The excavator 41 is provided with a rod-shaped drive member 42 and moves down while rotating the drive member 42. For example, the excavator 41 lowers the drive member 42 in the soil by a monotonic loading method that increases the load applied to the drive member 42 while rotating the drive member 42.

  The drive member 42 has a female screw structure that is screwed into the screw portion 16 at the tip, and is connected to the soil sampler 1 using the female screw structure.

  The excavator 41 is disposed on the soil from which the soil sample is obtained, and presses the soil while rotating the drive member 42. Then, the soil sampler 1 connected to the drive member 42 is pressed against the soil at the tip while rotating about the axis, and descends in the soil.

  As described above, when the soil sampler 1 is rotated and the soil is lowered, the soil is taken into the cylindrical member 10 from the opening 12. The soil taken into the tubular member 10 is guided by the plate member 11 formed in a spiral shape and is accommodated in the tubular member 10.

  Further, when the soil sampler 1 is lowered while being rotated and the soil material is further taken into the tubular member 10 from the opening 12, the soil material accommodated at the rear end of the tubular member 10 is guided by the slope portion 32. And discharged from the discharge port 13.

  Thus, when the soil sampler 1 reaches a predetermined depth, a soil sample at a predetermined depth is accommodated in the cylindrical member 10.

  After the soil collector 1 reaches a predetermined depth, the excavator 41 raises the drive member 42 connected to the soil collector 1 to the ground surface. Since the soil sample accommodated in the cylindrical member 10 is held by the cylindrical member 10 and the plate member 11, the soil sample from the opening 12 is prevented from falling while the soil sampler 1 is raised. The

  Here, when the excavator 41 rotates the driving member 42 at a high speed or when the pressing force is large, the soil taken in from the opening 12 is seized by friction with the surface of the plate member 11. May end up. In such a case, seizing of the soil sample can be prevented by slowing the rotational speed of the drive member 42 of the excavator 41 or reducing the force pressing the drive member 42. Moreover, seizing of a soil sample can also be prevented by using the soil sampler 1 having a small number of turns of the plate member 11 in the cylindrical member 10.

  The following effects can be obtained by the soil sampler 1 of the first embodiment.

  The soil sampler 1 according to the first embodiment includes a cylindrical member 10 and a plate member 11. The cylindrical member 10 is provided with an opening 12 at the tip and a discharge port 13 on a side surface. The plate member 11 is provided in the cylindrical member 10, and the front end (one end) protrudes from the opening 12, the rear end (the other end) is connected to the bottom portion 14, and is configured in a spiral shape along the longitudinal direction of the cylindrical member 10. Has been.

  The soil sampler 1 is connected to the tip of the drive member 42 of the excavator 41. Then, the tip is pushed into the soil while the soil sampler 1 is rotated by the excavator 41. As a result, the soil taken into the tubular member 10 from the opening 12 is guided by the spirally formed plate member 11 and is accommodated in the tubular member 10. Further, when the soil collector 1 is lowered and soil is further taken into the cylindrical member 10 from the opening 12, the soil stored at the rear end in the cylindrical member 10 is discharged from the discharge port 13. When the soil sampler 1 is lowered to a predetermined depth in this way, a soil sample at a predetermined depth is accommodated in the cylindrical member 10.

  Then, the soil sampler 1 is raised to the ground by the excavator 41, and the soil sample accommodated in the cylindrical member 10 is taken out. While the soil sampler 1 is raised, the soil sample accommodated in the tube member 10 is held by the tube member 10 and the plate member 11, so that the soil sample is prevented from falling from the opening 12. can do. Therefore, a soil sample at a predetermined depth can be reliably collected.

  Moreover, the soil sampling device 1 is formed integrally with the cylindrical member 10 and the plate member 11, and does not include a movable member. Generally, when collecting soil, after excavating a guide hole to a predetermined depth in advance, the soil sampler 1 is inserted into the guide hole and a soil sample at a predetermined depth is collected. Since the soil sampler 1 of the present invention accommodates the soil in the cylindrical member 10 while descending the soil, the soil sample can be collected without providing the guide hole. Can be omitted. Further, since there is no possibility that the movable member is sanded, it is difficult to break and the durability can be improved.

  Moreover, according to the soil sampling device 1 of the first embodiment, a pair of the discharge ports 13 are provided so as to face each other with the plate member 11 interposed therebetween.

  While the soil sampler 1 is descending in the soil, the soil taken in from the opening 12 is one surface side of the surface of the plate member 11 and the other surface side in the cylindrical member 10. Is housed. In this way, by providing the pair of discharge ports 13 so as to face each other with the plate member 11 therebetween, both the one surface side of the plate member 11 and the soil contained in the other surface side are discharged to the discharge port 13 can be discharged. Therefore, the soil at the rear end in the cylindrical member 10 is reliably discharged from the discharge port 13, and a soil sample at a predetermined depth is accommodated in the cylindrical member 10, so that the soil at a predetermined depth is surely received. Samples can be taken.

  Moreover, according to the soil sampling device 1 of the first embodiment, the discharge port 13 is formed from the position on the rear end side to the longitudinal end of the cylindrical member 10 over the front end surface of the bottom portion 14. By doing in this way, even if it is a case where the sandy soil which contains many sandy substances is extract | collected, a soil sample can be extract | collected easily.

  Since the sandy soil is coarse, the sandy soil falls from the opening 12 while the soil collector 1 is raised to the ground after the soil collector 1 reaches a predetermined depth and accommodates the soil sample. There is a risk of it.

  However, unlike the present embodiment, the discharge port 13 is not provided on the tip side of the longitudinal center of the cylindrical member 10. Therefore, the frictional force generated between the soil contained in the cylindrical member 10 and the inner surface of the cylindrical member 10 and the plate member 11 is increased on the distal end side of the cylindrical member 10.

  Therefore, the soil contained in the cylindrical member 10 is reliably held by the cylindrical member 10 and the plate member 11 on the tip side of the longitudinal center of the cylindrical member 10. Therefore, even when sandy soil is collected, the soil sample accommodated in the cylindrical member 10 is prevented from falling from the opening 12, so that the soil sample at a predetermined depth is reliably collected. Can do.

  Moreover, according to the soil extractor 1 of 1st Embodiment, the slope part 32 which goes to the rear-end part of the discharge port 13 is provided in one surface and the other surface of the surface of the rear end of the board member 11. As shown in FIG. ing.

  By doing in this way, when the soil is taken into the cylindrical member 10 from the opening 12 while the soil collector 1 is lowered, the soil already accommodated at the rear end of the cylindrical member 10 is sloped. It is guided by the portion 32 and discharged from the rear end of the discharge port 13. Therefore, when the soil collector 1 reaches a predetermined depth, the cylindrical member 10 contains the soil at a predetermined depth, so that a soil sample at a predetermined depth can be reliably collected. .

  Moreover, according to the soil sampler 1 of 1st Embodiment, the front-end | tip of the board member 11 is comprised as the sharp part 22 formed in the acute angle.

  By doing in this way, the friction with the front-end | tip part of the board member 11 and soil quality which generate | occur | produces while the soil extractor 1 descend | falls in the soil can be reduced. Therefore, even if the soil is hard, the soil sampler 1 can be lowered. In addition, seizure of the soil at the tip of the soil collector 1 is prevented. Therefore, it is possible to appropriately collect a soil sample.

  Moreover, according to the soil sampling device 1 of the first embodiment, the tubular member 10 has the tapered portion 21 whose tip is reduced in diameter from the side surface to the opening portion 12.

  By doing in this way, the friction with the front-end | tip part of the cylinder member 10 and soil which generate | occur | produces while the soil sampling device 1 descend | falls in the soil can be reduced. Therefore, not only the soil sampler 1 can be easily lowered when collecting the soil sample, but also the burnt of the soil sample can be prevented.

(Second Embodiment)
In 1st Embodiment, the discharge port 13 demonstrated the example comprised by the back end side rather than the midpoint of the longitudinal direction of the cylinder member 10. In FIG. In the present embodiment, another configuration of the discharge port 13 will be described.

  FIG. 5 is a diagram showing a soil sampler 1 according to the second embodiment.

  As shown in this figure, the discharge port 13 is formed from the position on the tip side to the center point in the longitudinal direction of the cylindrical member 10 and the tip surface of the bottom portion 14.

  According to the second embodiment, the following effects can be obtained.

  According to the soil sampling device 1 of the second embodiment, the discharge port 13 is formed from the position on the tip side to the bottom portion 14 with respect to the midpoint in the longitudinal direction of the cylindrical member 10. By doing in this way, even if it is a case where silt and clay are extract | collected, a soil sample can be extract | collected easily.

  Since silt and clay have high viscosity, silt and clay taken in from the opening 12 stick to the inner surface of the cylinder member 10 and the surface of the plate member 11. Therefore, the soil contained in the cylindrical member 10 is difficult to be discharged from the discharge port 13.

  However, in the present embodiment, compared to the first embodiment, the opening 12 is also provided at the tip rather than the midpoint in the longitudinal direction of the tubular member 10. Therefore, the frictional force generated between the soil contained in the tubular member 10 and the inner surface of the tubular member 10 and the plate member 11 is small on the distal end side of the tubular member 10. Therefore, for example, when the soil collector 1 is lowered and clay is taken into the cylindrical member 10 from the opening 12, the clay accommodated at the tip of the cylindrical member 10 is guided by the plate member 11, Easy to move to the rear end. Therefore, even when silt or clay is collected, since the soil sample of a predetermined depth is accommodated in the cylindrical member 10, the soil sample of the predetermined depth can be reliably collected.

  In addition, after the soil collector 1 containing silt and clay of a predetermined depth is pulled up to the ground, the discharge port 13 is formed large on the side surface of the cylindrical member 10, so that it can be easily accommodated in the cylindrical member 10. Can be taken out silt and clay.

DESCRIPTION OF SYMBOLS 1 Soil extractor 10 Cylinder member 11 Plate member 12 Opening part 13 Discharge port 14 Bottom part 15 Screw part 21 Taper part 22 Sharp part 32 Slope part 40 Soil sampling apparatus 41 Excavator

Claims (7)

A soil collector that collects soil,
A cylindrical member having an opening at the tip and a discharge port on the side surface;
A plate member provided in the cylindrical member, one end protruding from the opening, the other end connected to a bottom portion of the rear end of the cylindrical member, and configured in a spiral shape along the longitudinal direction of the cylindrical member;
A soil collector. A pair of the discharge ports are provided so as to face each other through the plate member.
The soil sampler according to claim 1. The discharge port is formed from the position on the rear end side with respect to the middle point in the longitudinal direction of the cylindrical member, over the bottom.
The soil sampler according to claim 1 or 2. The discharge port is formed across the bottom from a position on the tip side of the middle point in the longitudinal direction of the cylindrical member.
The soil sampler according to claim 1 or 2. On the surface of the other end of the plate member, a slope portion is provided that goes to the end on the rear end side of the discharge port.
The soil sampler according to any one of claims 1 to 4. The cylindrical member is configured in a tapered shape whose diameter is reduced from the side surface to the opening.
The soil sampler according to any one of claims 1 to 5. A soil collector according to any one of claims 1 to 6,
An excavator that is connected to a rear end of the soil sampler and rotates the soil sampler about an axis while pressing the soil sampler in a distal direction;
Soil sampling device having.

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