Soil sampler

Abstract

To surely pull up and recover soil collected from the ground in a sandwiched state.SOLUTION: A soil collector 1 includes: a sampling unit 4 including a first plate 2 and a second plate 3 horizontally spaced apart from the first plate 2, in which sampled soil enters between the first plate 2 and the second plate 3 when the first plate 2 and the second plate 3 are rotated and pushed into the ground; a rotating body 5 provided in the sampling unit 4 and imparting rotational force to rotate first plate 2 and the second plate 3; and a change mechanism 6 for changing between a first state in which a lower end of the first plate 2 and a lower end of the second plate 3 abut or approach each other and a second state in which the lower end of the first plate 2 and the lower end of the second plate 3 separate from each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a soil sampler for collecting soil to be subjected to soil analysis from a field.

Background Art

[0002] Conventionally, as a technique for collecting soil, soil samplers disclosed in Patent Documents 1 to 3 are known. The soil sampler disclosed in Patent Document 1 is generally called an auger screw. The auger screw of Patent Document 1 has a substantially constant pitch of the spiral blades from the bottom to the top. By rotating it from the ground surface into the soil using an appropriate drive source, it is advanced into the soil by one pitch of the spiral blades in one rotation. After advancing the auger screw to a desired depth in the soil, it is pulled out of the soil without rotating the auger screw. Then, the soil adhering to this auger screw is collected.

[0003] The soil sampler disclosed in Patent Document 2 is a soil sampler capable of reliably collecting soil at a predetermined depth. The soil sampler includes a cylindrical tube and a plurality of blades provided at the lower end of the tube. There is a flat portion between the plurality of blades. The soil sampler includes a cylindrical tube, a handle attachment hole provided at the upper end of the tube, and a handle detachably attached to the handle attachment hole. The soil sampler includes a guide piece attachable to the upper end of the tube, a guide rod inserted into a hole of the guide piece, and a cylindrical driving weight movable up and down along the guide rod.

[0004] The soil sampler disclosed in Patent Document 3 is a hole-drilling head and a hole-drilling device. The hole-drilling device includes a rod held by a drill chuck, a spiral blade disposed at the tip of the rod and rotating around the rod as an axis, and an agitation blade supported by the rod and swirling around the spiral blade together with the rod around the rod as an axis.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 6-346430 [Patent Document 2] Japanese Patent Application Laid-Open No. 2020-159002 [Patent Document 3] Japanese Patent Application Laid-Open No. 2020-176435 [Summary of the Invention] [Problems to be Solved by the Invention]

[0006] The soil samplers disclosed in Patent Documents 1 to 3 are provided with a screw twisted spirally at the tip or a blade at the tip of a cylindrical body. These soil samplers cut the ground with the screw or the blade to excavate the soil. However, when pulling up the excavated soil, the soil is pulled up by placing the excavated soil on the screw or pressing the excavated soil against the inner peripheral surface of the cylindrical body. At that time, an impact may be applied, such as when the screw or the cylindrical body gets caught at the mouth of the hole formed by excavation, or vibration may be applied, such as when the excavating body shakes. Then, since the soil is only placed on the screw, there is a possibility that the soil collected with great effort may fall from the soil sampler. Also, in the case of the cylindrical body, since the soil is only pressed against the vertically extending inner peripheral surface, there is a possibility that the soil collected with great effort may fall from the soil sampler. That is, the soil samplers of Patent Documents 1 to 3 have not been able to reliably collect the soil.

[0007] Therefore, in view of the above problems, an object of the present invention is to provide a soil sampler that can surely pull up and collect the soil collected from underground in a state where the soil is sandwiched. [Means for Solving the Problems]

[0008] The technical means of the present invention for solving this technical problem is characterized by the following points. The soil sampler includes a first plate and a second plate disposed at a distance in the horizontal direction from the first plate. When the first plate and the second plate are pushed into the ground while rotating, a sampling portion into which the soil collected between the first plate and the second plate enters, a rotating body provided in the sampling portion and applying a rotational force to rotate the first plate and the second plate, and a changing mechanism for changing between a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close to each other and a second state in which the lower end of the first plate and the lower end of the second plate are separated. The first plate extends vertically at a distance from the axis of the rotating body towards the outside, the second plate extends downward along the axis of the rotating body, and is formed in an inclined shape towards the lower end of the first plate at the tip of the downward extension, and the second plate is arranged so as to have an angle of attack with respect to the rotation direction of the rotating body 。 The soil sampler includes a first plate and a second plate disposed at a horizontal distance from the first plate. When the first plate and the second plate are pushed into the ground while rotating, a collection portion into which the soil collected between the first plate and the second plate enters, a rotating body provided in the collection portion and applying a rotational force for rotating the first plate and the second plate, a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close to each other, and a second state in which the lower end of the first plate and the lower end of the second plate are separated from each other, and a changing mechanism for changing between the two states. Between the first plate and the second plate, when the collection portion is in the first state, a pressing plate for pressing the soil sandwiched between the first plate and the second plate by moving downward is provided, and a lever for pushing the pressing plate downward is provided on the rotating body 。 The soil sampler includes a first plate and a second plate disposed at a horizontal distance from the first plate. When the first plate and the second plate are pushed into the ground while rotating, a collection portion into which the soil collected between the first plate and the second plate enters, a rotating body provided in the collection portion and applying a rotational force for rotating the first plate and the second plate, a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close to each other, and a second state in which the lower end of the first plate and the lower end of the second plate are separated from each other, and a changing mechanism for changing between the two states. A hinge portion for swingably supporting the first plate is provided at the upper end of the first plate, and a biasing member for applying a biasing force in a direction in which the first plate approaches the second plate is provided between the first plate and the second plate below the hinge portion. The changing mechanism is provided at the upper part of the first plate and is composed of an opening lever for separating the first plate from the second plate against the biasing force of the biasing member 。

[0009] When the soil sampler is pushed into the ground while rotating the first plate and the second plate, the soil is retained between the first plate and the second plate in the ground and is collected by being pulled out from the ground in the first state. The soil sampler takes out the soil sandwiched between the first plate and the second plate by changing the first plate and the second plate from the first state to the second state by the changing mechanism.

[0011] Between the rotating body and the sampling portion of the soil sampler, a pressing plate is formed that contacts the ground surface to suppress the insertion of the sampling portion into the ground. The soil sampler is provided with an adjusting mechanism capable of adjusting the vertical position of the pressing plate with respect to the rotating body. The adjusting mechanism of the soil sampler has an inner cylinder body inserted inside the rotating body and having a first through hole penetrating the peripheral wall, and a pin for positioning the inner cylinder body with respect to the rotating body. The inner cylinder body is disposed above the pressing plate and is movable vertically integrally with the pressing plate along the rotating body. A plurality of second through holes are formed side by side in the axial direction of the rotating body. When the inner cylinder body is moved along the rotating body, any one of the plurality of second through holes communicates with the first through hole, and the pin is inserted into the first through hole and the second through hole in a state where the first through hole and the second through hole communicate with each other.

[0012] The soil sampler is provided with a hook for hooking a sample bag for containing the collected soil.

Advantages of the Invention

[0013] According to the present invention, the soil collected from underground can be surely pulled up and recovered while being sandwiched.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0015] Hereinafter, an embodiment of the present invention will be described with appropriate reference to the drawings. The soil sampler 1 collects soil by pushing the first plate 2 and the second plate 3 into the soil and then rotating them, and pulling up and recovering the collected soil in a state where the collected soil is sandwiched. The rotation of the first plate 2 and the second plate 3 can be performed either manually (by hand) or using a rotational driving force generated by a motor or the like. In this embodiment, the soil sampler 1 of the present invention will be described by taking as an example the one that rotates the first plate 2 and the second plate 3 manually.

[0016] FIG. 1 is a perspective view showing the overall configuration of the soil sampler 1 according to this embodiment. FIG. 2 is a front view of the soil sampler 1 according to this embodiment. FIG. 3 is a side view of the soil sampler 1 according to this embodiment. As shown in FIGS. 1 to 3, the soil sampler 1 includes a first plate 2 and a second plate 3 disposed at a distance from the first plate 2 in the horizontal direction. The soil sampler 1 has a collection part 4 into which the soil collected between the first plate 2 and the second plate 3 enters when the first plate 2 and the second plate 3 are pushed into the ground and rotated in a predetermined direction. The soil sampler 1 is provided with a rotating body 5 provided in the collection part 4 and applying a rotational force for rotating the first plate 2 and the second plate 3.

[0017] Further, the soil sampler 1 is provided with a change mechanism 6 for changing the positional relationship between the first plate 2 and the second plate 3. By the change mechanism 6, the positional relationship between the first plate 2 and the second plate 3 is changed to either a first state or a second state. The first state is a positional relationship in which the lower end of the first plate 2 and the lower end of the second plate 3 are in contact or close to each other (see FIGS. 1 to 4). The second state is a positional relationship in which the lower end of the first plate 2 and the lower end of the second plate 3 are separated from each other (see the rightmost figure in FIG. 7). That is, the soil sampler 1 is provided with a change mechanism 6 for changing between a first state in which the lower end of the first plate 2 and the lower end of the second plate 3 are in contact or close to each other and a second state in which the lower end of the first plate 2 and the lower end of the second plate 3 are separated from each other.

[0018] The soil sampler 1 sandwiches the soil by changing from the second state to the first state by the change mechanism 6. Further, the soil sampler 1 releases the sandwiched soil by changing from the first state to the second state by the change mechanism 6. The soil sampler 1 can reliably collect the soil by sandwiching it by switching between the first state and the second state. Specifically, in the soil sampler 1 of the present embodiment, the second plate 3 is fixed so as not to swing, and the first plate 2 is made swingable. Note that in the soil sampler 1 of the present invention, among the two plate members, the first plate 2 may be fixed and the second plate 3 may be made swingable. Also, both the first plate 2 and the second plate 3 may be made swingable.

[0019] FIG. 5A is a view of the soil sampler 1 seen from below, that is, a bottom view of the soil sampler 1. Further, FIG. 5B is an enlarged view of the portion indicated by “A” in the drawing in FIG. 5A. Note that FIG. 5B shows only the positional relationship among the second plate 3, the rotating body 5, and a pressing plate 7 described later. As shown in FIGS. 4, 5A, and 5B, the first plate 2 is configured by combining three plate pieces extending along the vertical direction. The three plate pieces 2a, 2b, and 2c are arranged at a distance outward from the axis RA of the rotating body 5. The three plate pieces 2a, 2b, and 2c are all arranged such that the normal lines face the axis RA side of the rotating body 5, and are attached to the pressing plate 7 along the rotating direction R when collecting soil. The three plate pieces 2a, 2b, and 2c are arranged adjacent to each other so as to surround a part of the periphery of the rotating body 5. By arranging the three plate pieces 2a, 2b, and 2c adjacent to each other so as to surround a part of the periphery of the rotating body 5 in this way, since all the three plate pieces 2a, 2b, and 2c are attached along the rotating direction R, they can be easily rotated in a state of being inserted into the soil.

[0020] Of the three plate pieces that make up the first plate 2, the plate piece located on the foremost side in the rotation direction R when collecting soil is the first piece 2a. Note that for the soil collection tool 1 of this embodiment, the direction (rotation direction R) for gripping the gripping portion 9 and rotating the rotating body 5 is predetermined. The rotation direction R of the rotating body 5 is the direction of rotating the rotating body 5 counterclockwise around the axis RA when viewed from below. This rotation direction R is illustrated in FIGS. 5A and 5B. The first piece 2a is formed in a rectangle that is the longest in the vertical direction among the three plate pieces (see FIG. 4). Among the three plate pieces, the plate piece located on the rear side of the rotation direction R relative to the first piece 2a is the second piece 2b. The second piece 2b is a strip plate cut in an inclined shape such that the lower end moves downward as it approaches the first piece 2a. The length of the second piece 2b along the vertical direction is formed shorter than that of the first piece 2a. Among the three plate pieces, the plate piece located on the rearmost side of the rotation direction R is the third piece 2c. The third piece 2c is formed in a rectangle that is the shortest in the vertical direction among the three plate pieces.

[0021] As shown in FIG. 4, the above-described three plate pieces 2a, 2b, and 2c are joined together in a state where their upper ends are aligned at the same height. The first plate 2 formed by joining the three plate pieces 2a, 2b, and 2c has a shape (turtle shell bracket shape) in which the three plate pieces are bent and connected at an angle of 130° to 180° when viewed from below. In the first plate 2 formed by joining the three plate pieces in this way, a notch 2d where there is no plate piece is formed in the lower part on the rear side of the rotation direction R. This notch 2d is formed so as to reduce the contact resistance with the soil and make it easier for the first plate 2 to rotate even when inserted into the soil when the rotating body 5 is rotated in the predetermined rotation direction R.

[0022] As shown in FIG. 2, the first plate 2 extends in the vertical direction at a distance from the axis RA of the rotating body 5 to the outside. Therefore, when the rotating body 5 is rotated around the axis, the first plate 2 rotates at a distance from the axis of the rotating body 5 to the outside, and the soil is scraped in a cylindrical surface shape around the axis of the rotating body 5. On the one hand, the second plate 3 is a plate member that extends downward along the axis RA of the rotating body 5 from the lower surface of the pressing plate 7 described later. The second plate 3 is arranged to face the first plate 2. As shown in FIG. 4, the second plate 3 is bent in the middle in the vertical direction, and the upper part 3U and the lower part 3D have different orientation directions. The upper part 3U of the second plate 3 is a rectangular plate member that extends in the vertical direction. Also, the lower part 3D of the second plate 3 is inclined in a direction approaching the lower end of the first plate 2 from the lower end of the upper part 3U of the second plate 3. The lower part 3D of the second plate 3 is formed in a tip-tapering shape such that the plate width becomes narrower as it goes downward. By forming the lower part 3D of the second plate 3 in an inclined shape in this way, it becomes possible to shear and collapse the soil by rotating it around the axis of the rotating body 5.

[0023] As described above, the first plate 2 extends in the vertical direction at a distance from the axis of the rotating body 5 to the outside. And the second plate 3 extends downward along the axis of the rotating body 5 (from the lower surface of the pressing plate 7) and is formed in an inclined shape toward the lower end of the first plate 2 at the end of the downward extension. The second plate 3 is arranged so as to have an approach angle with respect to the rotation direction R of the rotating body 5. Therefore, when the rotating body 5 is rotated around an axis facing the vertical direction, the lower part of the second plate 3 not only shears the soil but also pushes it upward. The pushed-up soil is pushed into the collection part 4 described later. And since the soil sampler 1 itself moves downward by the amount of the pushed-up soil, it advances downward while excavating the soil in the same way as when using a screw-shaped drill or the like.

[0024] FIG. 4 is an enlarged view showing the collection part 4 of the soil sampler 1. As shown in Fig. 4, the collection part 4 is a space formed between the first plate 2 and the second plate 3 facing the first plate 2. The collection part 4 is a part where the soil pushed up by the second plate 3 is accommodated as the collected soil. Specifically, the upper part of the collection part 4 is formed between the upper part of the first plate 2 and the upper part 3U of the second plate 3 that face each other. Also, the lower part of the collection part 4 is formed between the lower part of the first plate 2 with a notch formed therein and the lower part 3D of the second plate 3 inclined to have a rake angle. The lower part of the collection part 4 is a part for excavating soil, and the lower part of the collection part 4 is a part for accommodating the excavated soil. The collection part 4 provided in the soil collection tool 1 of the present embodiment is a part that combines the upper part for excavating soil and the lower part for accommodating soil.

[0025] As described above, the soil collection tool 1 of the present embodiment includes a change mechanism 6 for changing the positional relationship between the first plate 2 and the second plate 3. The change mechanism 6 changes the positional relationship between the two plate members (the positional relationship between the first plate 2 and the second plate 3) between the first state and the second state. The first state is a state where the lower end of the first plate 2 and the lower end of the second plate 3 are in contact or close to each other (see Figs. 1 to 4). In the first state, the soil is sandwiched between the two plate members, and the soil is strongly pushed in the horizontal direction. That is, in the first state, a compressive force in the horizontal direction is applied to the soil in the collection part 4. Therefore, the frictional force between the first plate 2 and the second plate 3 and the soil increases. Since the frictional force is large, it becomes possible to lift or move the soil so that it does not fall.

[0026] The second state is a state where the lower end of the first plate 2 and the lower end of the second plate 3 are separated from each other (see the rightmost figure in Fig. 7). In other words, in the second state, the first plate 2 and the second plate 3 are in a substantially parallel state and are neither close nor in contact. In the second state, the force acting on the soil in the horizontal direction (the force for sandwiching the soil) from the two plate parts 2 and 3 is small. Therefore, in the second state, the compressive force applied to the soil in the collection part 4 in the horizontal direction is also weak. As a result, the frictional force between the first plate 2 and the second plate 3 and the soil decreases. Since the frictional force is small, it becomes possible to release and drop the soil.

[0027] That is, although it will be described later with reference to FIGS. 6 and 7, in the soil sampler 1 of the present embodiment, by changing from the second state to the first state by the changing mechanism 6, soil can be retained in the collection part 4 between the first plate 2 and the second plate 3 in the ground. Then, by pulling up the soil retained in the collection part 4 from the ground while maintaining the first state, the soil can be collected. Next, by changing from the first state to the second state by the changing mechanism 6, the soil retained in the collection part 4 can be dropped, and the collected soil can be collected in a collection container 8 or the like.

[0028] In the soil sampler 1 of the present embodiment, when the first plate 2 and the second plate 3 are pushed into the ground while rotating, the soil is retained between the first plate 2 and the second plate 3 in the ground, and the soil is collected by being pulled up from the ground in the first state. Further, the soil sampler 1 takes out the soil sandwiched between the first plate 2 and the second plate 3 by changing the first plate 2 and the second plate 3 from the first state to the second state by the changing mechanism 6.

[0029] As shown in FIGS. 4 and 5, the soil sampler 1 of the present embodiment includes a pressing plate 7. The above-described first plate 2 and second plate 3 are attached to the pressing plate 7. The pressing plate 7 is provided between the rotating body 5 and the collection part 4, and suppresses the insertion of the collection part 4 into the ground by contacting the ground surface. The pressing plate 7 is a plate arranged along the horizontal direction. In the case of the present embodiment, the planar shape of the pressing plate 7 is substantially square, but other shapes such as a circular shape may be used. A vertically long cylindrical inner cylinder 10 is arranged above the pressing plate 7. The inner cylinder 10 is fixed to the pressing plate 7 and is movable in the vertical direction integrally with the pressing plate 7.

[0030] The above-described second plate 3 is arranged on the lower surface of the pressing plate 7. The upper end of the second plate 3 is fixed to the lower surface of the pressing plate 7, and the second plate 3 moves in the vertical direction and rotates in the horizontal direction integrally with the pressing plate 7. The second plate 3 is arranged at the center of the lower surface of the pressing plate 7. The second plate 3 is arranged at a position where the axis extended when the axis RA of the rotating body 5 is extended downward penetrates the upper part of the second plate 3 vertically.

[0031] As shown in FIG. 4, in the soil sampler 1 of the present embodiment, a hinge portion 11 that swingably supports the first plate 2 is provided at the upper end of the first plate 2. The hinge portion 11 is provided on the side portion of the pressing plate 7. Specifically, the hinge portion 11 has two swing pieces 11a and 11b that are swingable around a swing axis facing the front-rear direction. One swing piece 11a is fixed to the pressing plate 7 using a fastener 21 or the like. The other swing piece 11b is fixed to the left surface (outer surface) of the upper portion of the first plate 2.

[0032] As shown in FIG. 4, the soil sampler 1 of the present embodiment includes a biasing member 12. The biasing member 12 is a member that applies a biasing force to the first plate 2 in a direction approaching the second plate 3. The biasing member 12 is disposed between the first plate 2 and the second plate 3 below the hinge portion 11. In the present embodiment, a metal string wound spring is used for the biasing member 12. By providing the biasing member 12, a biasing force in a direction approaching the second plate 3 is constantly applied to the first plate 2. In other words, the biasing force of the biasing member 12 always acts in a direction to change the positional relationship between the first plate 2 and the second plate 3 from the second state to the first state.

[0033] The change mechanism 6 provided in the soil sampler 1 of the present embodiment is composed of an opening lever 13. The opening lever 13 separates the first plate 2 from the second plate 3 against the biasing force of the biasing member 12. In other words, the opening lever 13 changes the positional relationship between the first plate 2 and the second plate 3 from the first state to the second state against the biasing force of the biasing member 12. Specifically, the release lever 13 is a rod-shaped member that separates the first plate 2 from the second plate 3 against the biasing force of the biasing member 12. The release lever 13 is provided at the upper part of the first plate 2. Specifically, the release lever 13 extends obliquely upward from the left side surface of the first plate 2 and bends upward at the extended end. Further, after bending upward, the release lever 13 extends upward to the vicinity of the lower part of the rotating body 5. Since the lower end of the release lever 13 is fixed to the first plate 2 that can swing by the hinge portion 11, when the release lever 13 is swung left and right, the first plate 2 also swings left and right together with the release lever 13.

[0034] For example, swing the upper part of the release lever 13 to the right. Then, the upper part of the release lever 13 moves in a direction approaching the rotating body 5. The first plate 2 located on the opposite side of the upper part of the release lever 13 across the hinge portion 11 swings to the left, which is opposite to the upper part of the release lever 13. Then, the first plate 2 moves away from the second plate 3, and the positional relationship between the first plate 2 and the second plate 3 changes from the first state to the second state.

[0035] On the other hand, swing the upper part of the release lever 13 to the left. Then, the upper part of the release lever 13 moves in a direction away from the rotating body 5. The first plate 2 located on the opposite side of the upper part of the release lever 13 across the hinge portion 11 swings to the right, which is opposite to the upper part of the release lever 13. Then, the first plate 2 approaches or contacts the second plate 3, and the positional relationship between the first plate 2 and the second plate 3 changes from the second state to the first state.

[0036] Next, the adjustment mechanism 14 will be described. As shown in Fig. 8, the soil sampler 1 is provided with an adjustment mechanism 14 capable of adjusting the vertical position of the pressing plate 7 with respect to the rotating body 5. The adjustment mechanism 14 has the inner cylinder 10 and the pin 15 described above. The inner cylinder 10 is disposed (fixed) on the upper surface of the pressing plate 7. The inner cylinder 10 is movable vertically integrally with the pressing plate 7 along the rotating body 5. Specifically, the inner cylinder 10 is a circular tube member inserted inside the rotating body 5 and is movable vertically inside the rotating body 5. The pin 15 positions the inner cylinder 10 with respect to the rotating body 5. Specifically, the adjustment mechanism 14 adjusts the vertical position of the pressing plate 7 by positioning the position of the inner cylinder 10 with respect to the rotating body 5 using the pin 15.

[0037] Specifically, the inner cylinder 10 is a circular tube member having the same outer diameter as the inner diameter of the rotating body 5, specifically, the inner diameter of the lower body 5D of the rotating body 5 described later, or an outer diameter smaller than the inner diameter of the lower body 5D. As shown in Figs. 3 and 4, the inner cylinder 10 is formed to have dimensions such that when the lower end of the inner cylinder 10 is at the same vertical position as the lower end of the lower body 5D, the upper end of the inner cylinder 10 is located slightly above a lever 16 described later.

[0038] As shown in Fig. 8, a first through hole 17 is formed in the middle part in the vertical direction of the inner cylinder 10. The first through hole 17 is a hole penetrating the peripheral wall of the inner cylinder 10 inside and outside. In the case of this embodiment, the first through hole 17 horizontally penetrates the peripheral wall of the inner cylinder 10 in the front-rear direction. That is, the first through hole 17 has an opening on the outer peripheral surface on the front side of the inner cylinder 10. Then, the first through hole 17 penetrates the inside of the inner cylinder 10 in the front-rear direction from the front opening and reaches the rear opening formed on the outer peripheral surface on the rear side of the inner cylinder 10.

[0039] Note that although only a single first through hole 17 is provided in the adjustment mechanism 14 of this embodiment, a plurality of first through holes 17 can also be formed at different vertical positions in the middle side in the vertical direction of the inner cylinder 10. By forming such a plurality of first through holes 17, it becomes possible to change the vertical position of the pressing plate 7 with respect to the rotating body 5 in multiple steps. As shown in FIGS. 1 to 3 and FIG. 8, a plurality of second through holes 18 are formed in the rotating body 5 side by side in the direction of the axis RA of the rotating body 5. The second through hole 18 is a hole that penetrates the peripheral wall of the rotating body 5 and the peripheral wall of the lower body 5D of the rotating body 5 inside and outside. The second through hole 18 horizontally penetrates the peripheral wall of the rotating body 5 in the front-rear direction. That is, the second through hole 18 has openings on the outer peripheral surface on the front side and the outer peripheral surface on the rear side of the rotating body 5. And the second through hole 18 penetrates the inside of the rotating body 5 in the front-rear direction from the front opening, and reaches the rear opening formed on the outer peripheral surface on the rear side of the rotating body 5.

[0040] In the case of the present embodiment, a plurality of second through holes 18 are formed in the peripheral wall of the rotating body 5 at different vertical positions. Therefore, when the inner cylindrical body 10 is moved vertically inside the rotating body 5, one of the plurality of second through holes 18 communicates with the first through hole 17. In a state where one of the plurality of second through holes 18 communicates with the first through hole 17, the pin 15 can be inserted into both the first through hole 17 and the second through hole 18 in a communicating state.

[0041] The pin 15 is formed longer than the dimension from the front opening to the rear opening of the first through hole 17 (the outer diameter dimension of the inner cylindrical body 10). As shown in FIG. 8, in the case of the adjustment mechanism 14 of the present embodiment, two second through holes 18 are formed in the peripheral wall of the rotating body 5 at different vertical positions. On the left side of FIG. 8, the first through hole 17 of the inner cylindrical body 10 communicates with the upper second through hole 18U of the rotating body 5. And the pin 15 positions the lower body 5D of the rotating body 5 on the inner cylindrical body 10 in a state where the first through hole 17 and the upper second through hole 18U communicate with each other.

[0042] Here, the pin 15 is removed from the first through hole 17 and the second through hole 18, and the inner cylindrical body 10 is moved downward with respect to the rotating body 5. Then, the first through hole 17 of the inner cylindrical body 10 comes to communicate with the lower second through hole 18D of the rotating body 5. When the first through hole 17 and the lower second through hole 18D communicate with each other, the pin 15 is inserted into both the first through hole 17 and the lower second through hole 18D, and the lower body 5D of the rotating body 5 is positioned on the inner cylindrical body 10 as shown on the right side of FIG. 8.

[0043] On the right side of FIG. 8, the inner cylinder 10 is positioned in a state where it protrudes more downward compared to the left side of FIG. 8. Therefore, the pressing plate 7 provided at the lower end of the inner cylinder 10 also comes to be located more downward. By performing the above procedure, the vertical position of the pressing plate 7 with respect to the rotating body 5 can be adjusted and changed downward using the adjustment mechanism 14. In addition, when adjusting and changing the vertical position of the pressing plate 7 with respect to the rotating body 5 upward using the adjustment mechanism 14, by performing the procedure opposite to the above-described procedure, the vertical position of the pressing plate 7 with respect to the rotating body 5 can be adjusted and changed upward.

[0044] Next, the rotating body 5 that rotates the pressing plate 7 and the gripping portion 9 that rotates the rotating body 5 will be described. As shown in FIGS. 1 to 3 and the like, on the upper side of the soil sampler 1 of the present embodiment, there is provided a gripping portion 9 that generates a rotational driving force around a vertical axis for the rotating body 5 by being gripped and rotated by hand. The gripping portion 9 is a long rod-shaped member extending in the horizontal direction (the left-right direction in the illustrated example). The left end portion of the gripping portion 9 is covered with a left-hand gripping cover 19L, and the right end portion is covered with a right-hand gripping cover 19R.

[0045] The rotating body 5 is combined with an upper body 5U formed by combining circular pipe materials in a substantially T shape, and a straight tubular lower body 5D inserted inside the lower side of the upper body 5U. The inner diameter of the pipe material constituting the upper body 5U of the rotating body 5 is set to a size that allows the gripping portion 9 to be inserted therein. At the intersection of the horizontally extending pipe material and the vertically extending pipe material in the upper body 5U, a connector 20 is provided for fixing the upper body 5U and the gripping portion 9 in a state where they are inserted through each other. Inside the vertically extending pipe material in the upper body 5U, the lower body 5D of the rotating body 5 can be inserted from the lower side.

[0046] The lower body 5D of the rotating body 5 is formed of a pipe material that can be inserted inside the upper body 5U. That is, the outer diameter of the pipe material constituting the lower body 5D is made smaller than the inner diameter of the pipe material constituting the upper body 5U, and the lower body 5D can be inserted inside the upper body 5U. On the upper side of the lower body 5D, at the portion that overlaps with the upper body 5U both inside and outside, a fastener 21 is provided to connect and fix the peripheral wall of the upper body 5U and the peripheral wall of the lower body 5D in communication. By providing this fastener 21, the lower body 5D is connected to the upper body 5U in a state where its movement in the vertical direction is restricted.

[0047] At the middle side in the vertical direction of the lower body 5D, a first through-hole 17 of an adjustment mechanism 14 to be described later is formed. The first through-hole 17 is formed so as to penetrate the peripheral wall of the lower body 5D, and a plurality of them are formed with different heights in the vertical direction. That is, the lower body 5D of the rotating body 5 functions as the inner cylinder 10 of the above-described adjustment mechanism 14. As shown in FIGS. 2 and 3, in the soil collection tool 1, a pressing plate 22 is provided between the first plate 2 and the second plate 3. When the collection part 4 is in the first state, the pressing plate 22 moves downward to press the soil sandwiched between the first plate 2 and the second plate 3. And a lever 16 for pushing the pressing plate 22 downward is provided on the rotating body 5.

[0048] The pressing plate 22 is a plate member that can be inserted between the first plate 2 and the second plate 3 in the first state. The pressing plate 22 is arranged along the horizontal direction and is formed in a rectangular plate shape that is long in the front-rear direction. The length of the pressing plate 22 along the front-rear direction is formed longer than the length of either the first plate 2 or the second plate 3 in the front-rear direction, so that the soil collected by the collection part 4 can be reliably compressed.

[0049] A connecting plate 23 extending in the vertical direction is provided at the front end of the pressing plate 22. Also, a lifting plate 24 extending in the front-rear direction is provided at the upper end of the connecting plate 23. The lifting plate 24 is arranged along the horizontal direction so as to be substantially parallel to the pressing plate 22. As shown in FIG. 3, these pressing plate 22, connecting plate 23, and lifting plate 24 are arranged in an arrangement like a "U" shape rotated 90° clockwise when viewed from the left, and are connected to each other.

[0050] The lever 16 is a member that pushes down the pressing plate 22. The lever 16 extends horizontally rightward from the rotating body 5. The left end of the lever 16 is connected to a cylindrical base 26 that is externally inserted into the lower body 5D of the rotating body 5. The base 26 is formed in a cylindrical shape with an inner diameter slightly larger than the outer diameter of the lower body 5D of the rotating body 5, and is movable in the vertical direction while being externally inserted into the lower body 5D of the rotating body 5. And on the outer peripheral surface on the left side of the base 26, a transmission plate 25 is provided which, by being connected to the lifting plate 24 described above, transmits the pushing-down operation of the lever 16 to the pressing plate 22.

[0051] That is, when the lever 16 is pushed down downward, the cylindrical base 26 moves downward while being externally inserted into the lower body 5D of the rotating body 5. Then, the transmission plate 25 fixed to the outer peripheral surface of the base 26 moves downward, and the lifting plate 24 connected to the transmission plate 25 also moves downward. Since the pressing plate 22 is attached to this lifting plate 24 via the connecting plate 23, the pressing plate 22 descends between the first plate 2 and the second plate 3 and pushes the soil collected by the collection part 4 downward, and the soil is compressed.

[0052] As shown in FIGS. 1 and 2, the soil sampler 1 of the present embodiment includes a hook 27 for hooking a sample bag for storing the collected soil. The hook 27 is provided at the rear end of the pressing plate 7. The hook 27 protrudes upward from the rear end of the pressing plate 7. By providing such a hook 27, one or more bags containing soil samples can be suspended.

[0053] For example, when collecting soil multiple times in a vast farmland, in conventional soil collection, an operator who carries the collected soil samples was always necessary in addition to the operator who collects the soil. Although it is possible to temporarily leave the soil samples in the farmland, a great deal of additional labor is required to collect the left-behind bags. However, in the soil sampler 1 of the present embodiment, while a bag containing a soil sample is hung on the hook 27, an operator who performs soil sampling can also handle the sample. That is, since the soil sampling operation that conventionally required multiple people can now be performed by one person, labor saving and efficiency improvement in soil sampling are made possible.

[0054] Next, the procedure for soil sampling using the soil sampler 1 of the present embodiment will be described. First, as shown on the left side of FIG. 6, the soil sampler 1 of the present embodiment is lifted from the ground surface to a predetermined height. At this time, due to the biasing force of the biasing member 12, the first plate 2 is biased to the right (toward the second plate 3 side), and the positional relationship between the first plate 2 and the second plate 3 is in the first state. Next, the soil sampler 1 is thrusted into the ground. Then, while gripping the gripping cover 19 with both hands, the gripping portion 9 is rotated in a predetermined rotation direction R. In the case of the present embodiment, the rotation direction R of the gripping portion 9 (rotating body 5) is clockwise when viewed from above.

[0055] When the gripping portion 9 is rotated in the predetermined rotation direction R, the rotational driving force of the gripping portion 9 is applied to the rotating body 5, and the rotating body 5 rotates about its axis in the predetermined rotation direction R (see FIGS. 5A and 5B). The rotating body 5 has an upper body 5U and a lower body 5D, and the rotation of the upper body 5U is also transmitted to the lower body 5D connected via the coupler 20. The rotation of this rotating body 5 is also transmitted to the inner cylinder 10 positioned by the pin 15 and the pressing plate 7 fixed to the lower side of the inner cylinder 10. Then, when the pressing plate 7 rotates about the axis of the rotating body 5, the second plate 3 fixed to the lower side of the pressing plate 7 also rotates about the axis of the rotating body 5.

[0056] The second plate 3 is bent at a mid-portion in the vertical direction, and the lower portion of the second plate 3 is inclined in a direction approaching the lower end of the first plate 2 from the lower end of the upper portion. By forming the lower portion of the second plate 3 in an inclined shape in this way, it becomes possible to shear and collapse the soil by rotating it about the axis of the rotating body 5. Further, the lower part of the second plate 3 is arranged so as to have an angle of attack with respect to the rotation direction R of the rotating body 5. Therefore, when the rotating body 5 is rotated about the axis facing the vertical direction, the lower part of the second plate 3 not only shears the soil but also pushes it upward. The pushed-up soil is pushed into the collecting part 4 described later. And since the soil sampler 1 itself moves downward by the amount of the pushed-up soil, it advances downward while excavating the soil in the same manner as when using a screw-shaped drill or the like (see the second figure from the left in Fig. 6).

[0057] When the soil sampler 1 advances into the ground in this way, eventually the pressing plate 7 comes into contact with the ground surface (see the third figure from the left in Fig. 6). When the pressing plate 7 comes into contact with the ground surface, the soil sampler 1 stops penetrating into the ground. As a result, the depth of the collecting part 4 from the ground surface is determined, and the depth of the collected soil from the ground surface is determined. At this time, the collecting part 4 contains the soil sheared and broken by the second plate 3. The soil contained in this collecting part 4 may contain air due to excavation. Therefore, the soil is pushed downward and compressed using the pressing plate 22 to extrude the air contained in the accommodated soil.

[0058] As shown in the rightmost figure of Fig. 6, when pressing the soil with the pressing plate 22, the lever 16 extending horizontally rightward from the rotating body 5 is pushed downward. As shown in Fig. 1 and the like, the left end of the lever 16 is connected to the cylindrical base 26, and a transmission plate 25 is provided on the outer peripheral surface on the left side of the base 26. Therefore, when the lever 16 is pushed downward, the cylindrical base 26 moves downward in a state of being inserted into the lower body 5D of the rotating body 5. Then, the transmission plate 25 fixed to the outer peripheral surface of the base 26 moves downward, and the lifting plate 24 connected to the transmission plate 25 also moves downward. Since the pressing plate 22 is attached to this lifting plate 24 via the connecting plate 23, the pressing plate 22 descends and pushes the collected soil downward, and the soil is compressed.

[0059] When the soil is pushed, the compressed soil is crimped to the first plate 2 and the second plate 3, so that it becomes possible to lift the soil collected in the collecting part 4 without dropping it. Next, as shown in the left end of FIG. 7 and the second figure from the left, the collection part 4 of the soil collection tool 1 in which soil has been collected by the collection part 4 is pulled upward from the ground (as indicated by the arrow). At this time, due to the biasing force of the biasing member 12, the first plate 2 is biased to the right (toward the second plate 3 side), and the positional relationship between the first plate 2 and the second plate 3 is in the first state as in the case of FIG. 6.

[0060] When the soil collection tool 1 of the present embodiment is pulled up to the ground, as shown in the right end figure of FIG. 7, the upper part of the opening lever 13 is swung to the right (toward the gripping part 9 side). Then, the upper part of the opening lever 13 moves in a direction approaching the rotating body 5. The first plate 2 located on the opposite side of the upper part of the opening lever 13 across the hinge part 11 swings to the left, which is opposite to the upper part of the opening lever 13. Then, the first plate 2 moves so as to increase the distance from the second plate 3, and the positional relationship between the first plate 2 and the second plate 3 changes to the second state.

[0061] This second state is a state in which the lower end of the first plate 2 and the lower end of the second plate 3 are separated. In the second state, the forces acting on the soil in the horizontal direction from the two plate parts are small. Therefore, in the second state, the compressive force and the frictional force applied to the soil in the collection part 4 in the horizontal direction are also weak. Since the frictional force is small, it becomes possible to release and drop the soil. If there is soil remaining (residual soil) between the first plate 2 and the second plate 3, when the lever 16 is pushed downward in a state where the lower end of the first plate 2 and the lower end of the second plate 3 are separated, it is also possible to drop the residual soil. That is, in this case, the push plate 22 can be used as a scraper.

[0062] In this way, in the soil collection tool 1 of the present embodiment, by pushing the soil collection tool 1 into the ground with the positional relationship between the first plate 2 and the second plate 3 in the first state, the soil in the ground is retained in the collection part 4 between the first plate 2 and the second plate 3. Then, the soil retained in the collection part 4 is pulled up from the ground while remaining in the first state. Next, by changing from the first state to the second state by the changing mechanism 6, the soil retained in the collection part 4 can be dropped, and the collected soil can be reliably collected into the collection container 8 or the like.

[0063] As shown in FIG. 9, the soil sampler 1 of this embodiment may be provided with an information management unit 50 that manages information such as the time, location, or conditions when the soil is sampled. The management of information by the information management unit 50 includes, for example, recording, storing, communicating, and printing of information. The management information managed by the information management unit 50 includes the following. The management information includes the date and time when the soil sampling was performed. The date and time when the soil sampling was performed is indicated by the year, month, day, time, day of the week, morning / afternoon, etc.

[0064] The management information includes information on the location (position information) where the soil sampling was performed. The position information is positioning information received from positioning satellites. The management information includes information on the operator who performed the soil sampling. The information on the operator includes, in addition to the name of the operator, the name of the organization or corporation to which the operator belongs, the address, ID, etc. The management information includes information on the field where the soil sampling was performed. The information on the field includes information useful for judging the results of soil analysis. The information on the field includes, for example, information such as the crop that was planted before the soil sampling and the type of crop to be planted in the next season. If the information on the crop that was planted before the soil sampling is known, it is possible to judge the nutrients in the soil that are likely to have been consumed by the previous planting. Also, if the type of crop to be planted in the next season is known, it is possible to judge the nutrients that will be consumed significantly in the next planting, such as silicon in paddy rice.

[0065] The management information includes information such as the destination to which the soil analysis is to be requested. The above-described management information is obtained via a communication device 30 or the like described later, or is input in advance from a mobile terminal device 37 or the like described later and recorded together with the information that the soil sampling has been performed. Also, the recorded management information is sent to an external storage unit 35 via the communication device 30 and stored in the storage unit 35. Or it is printed on a label or the like using a label printer 36 carried together with the soil sampler 1.

[0066] Next, the collection detection unit 28, communication device 30, storage unit 35, mobile terminal device 37, and label printer 36 provided in the soil collection tool 1 will be described so that information management can be performed by the information management unit 50. The collection detection unit 28 is a part that detects that soil has been collected. The collection detection unit 28 detects that the positional relationship between the first plate 2 and the second plate 3 has changed, in other words, that the soil collection operation has been performed. For such a collection detection unit 28, a sensor such as a limit switch can be used.

[0067] For example, taking the collection detection unit 28 using a limit switch as an example, the limit switch (collection detection unit 28) is provided on the lower body 5D of the rotating body 5 or the opening lever 13. When dropping the collected soil into the collection container 8, the positional relationship between the first plate 2 and the second plate 3 changes from the first state to the second state. When changing from the first state to the second state, the lower end of the first plate 2 separates from the lower end of the second plate 3, and the opening lever 13 approaches the lower body 5D of the rotating body 5. Therefore, the above-mentioned limit switch detects the approach of the opening lever 13 to the lower body 5D of the rotating body 5.

[0068] When detecting the approach of the opening lever 13, the limit switch (collection detection unit 28) switches from an OFF signal to an ON signal. Then, an ON signal of the limit switch is output from the collection detection unit 28 to the communication device 30 as a signal indicating that "soil collection has been performed". Note that the above-mentioned limit switch is just an example, and sensors other than the limit switch can also be used for the collection detection unit 28. For example, a pressure sensor or the like can be provided on the lower body 5D of the rotating body 5 or the opening lever 13 to detect that the opening lever 13 has contacted the lower body 5D of the rotating body 5. Also, a proximity sensor such as an inductive type, capacitive type, or magnetic type, or a sensor such as a photoelectric switch can be provided on the lower body 5D of the rotating body 5 or the opening lever 13 to detect the approach of the opening lever 13 to the lower body 5D of the rotating body 5.

[0069] Furthermore, the sampling detection unit 28 may be provided with a recording switch 29 for the user to manually record that soil sampling has been performed. The recording switch 29 is pressed by the user himself / herself when collecting the soil into the collection container 8. Such a recording switch 29 is provided, for example, in the vicinity of the gripping portion 9 so that it can be easily pressed by the user. The recording switch 29 can be provided instead of, or in addition to, the above-described limit switch (sensor).

[0070] The communication device 30 communicates, via an external network, a signal indicating that "soil collection has been performed" output from the sampling detection unit 28 to the mobile terminal device 37. Further, the communication device 30 receives management information regarding the date and time, location, field, etc. via the external network. As the communication standard of the communication device 30, for example, Wi-Fi (Wireless Fidelity, registered trademark) of the IEEE802.11 series, BLE (Bluetooth (registered trademark) Low Energy), LPWA (Low Power, Wide Area), LPWAN (Low-Power Wide-Area Network), etc. can be used. Also, as the communication device 30, for example, a mobile phone communication network or a data communication network can be used. Although all of the above-described communication standards are wireless communication standards, the communication device 30 may be wired.

[0071] When the information communicated by the communication device 30 includes time information indicating the date and time when soil collection was performed, a time recording unit 34 is provided in the soil sampler 1. The time recording unit 34 includes, for example, an antenna that receives the first satellite signal of GNSS satellites, and the antenna receives L1 signal and L2 signal. The antenna can receive satellite signals (second satellite signals) of quasi-zenith satellites (QZSS (Quasi-Zenith Satellite System) satellites) such as Michibiki. The antenna receives at least the L6 signal (center frequency 1278.75 MHz) transmitted from the QZSS satellite as the second satellite signal. The L6 signal contains correction information (centimeter-level positioning enhancement information). The correction information includes satellite clock error information, satellite signal bias error information, satellite orbit error information, tropospheric propagation error information, ionospheric propagation error information, and the like. Note that the antenna may receive the L1 signal and L2 signal transmitted from GNSS satellites as the second satellite signal. The time recording unit 34 receives correction information from satellites using the antenna, and can accurately record the time when the soil collection operation was performed based on the correction information.

[0072] When a signal indicating that "soil collection has been performed" is output from the collection detection unit 28, management information such as the date and time when the soil collection operation was performed is accurately recorded by the time recording unit 34. Then, the management information regarding the recorded time is sent to the communication device 30, and the management information regarding the date and time is sent to the mobile terminal device 37 together with the information indicating that "soil collection has been performed". Instead of providing the time recording unit 34 in the soil sampler 1, time information can also be acquired through an external network. In this case, a soil sampler 1 without the time recording unit 34 can also be used.

[0073] When the information communicated by the communication device 30 includes positioning information (location information) when the soil collection operation was performed, a positioning device 31 is provided in the soil sampler 1. The positioning device 31 can detect its own position (positioning information including latitude and longitude) by means of a satellite positioning system (positioning satellite) such as D-GPS, GPS, GLONASS, Beidou, Galileo, or Michibiki. That is, the positioning device 31 receives satellite signals (position of the positioning satellite, transmission time, correction information, etc.) transmitted from the positioning satellite, and based on the satellite signals, detects the position of the soil sampler 1 (for example, latitude and longitude), that is, the aircraft position VP1. The positioning device 31 includes a receiving device 32 and an inertial measurement unit (IMU) 33. The receiving device 32 has an antenna or the like and is a device that receives satellite signals transmitted from the positioning satellite. The inertial measurement unit 33 has an acceleration sensor that detects acceleration, a gyro sensor that detects angular velocity, and the like. The inertial measurement unit 33 is provided on the soil sampler 1 and can measure, for example, the inclination angle and displacement of the soil sampler 1. The positioning device 31 sends information such as the position information received by the receiving device 32 and the inclination angle and displacement of the soil sampler 1 measured by the inertial measurement unit 33 to the communication device 30. Then, in the communication device 30, the positioning information measured by the positioning device 31 is sent to the portable terminal device 37 together with information indicating that "soil collection has been performed".

[0074] The information transmitted via the above-described communication device 30 can be received by the portable terminal device 37. The portable terminal device 37 is, for example, a smartphone (multifunctional mobile phone) or a tablet PC with relatively high computing power. As shown in FIG. 9, the portable terminal device 37 is supposed to be held by the user at the time of soil collection and is assigned to each user. The portable terminal device 37 includes a second communication unit 38, a storage unit 35, a control unit 39, and a display unit 40. The second communication unit 38 communicates with the server by, for example, Wi-Fi (Wireless Fidelity, registered trademark) of the IEEE802.11 series, which is a communication standard, or the fifth-generation communication system. The control unit 39 is composed of a CPU or the like and controls the second communication unit 38, the storage unit 35, and the display unit 40. The display unit 40 is composed of a touch panel or the like.

[0075] The control unit 39 stores an application program (application software) for managing the collected soil based on the information communicated by the communication device 30. When the user operates the display unit 40 to start the application program, an input screen for inputting supplementary data is displayed. On this input screen, for example, information regarding the user's name, the name of the field, the type of crop to be cultivated after soil collection, the type of fertilizer to be applied, or the amount of fertilizer to be applied, the type of crop cultivated before soil collection, the type of fertilizer applied, or the amount of fertilizer applied, the destination of the request for soil analysis, etc. is input. Hereinafter, the information input on this input screen is referred to as supplementary information. When the supplementary information is input on the input screen, the application program stores the input supplementary information in the storage unit 35. By storing the supplementary information in the storage unit 35 in this way, the stored supplementary information can be used as a work record regarding soil collection.

[0076] The storage unit 35 is, for example, a RAM (Random Access Memory) built into the mobile terminal device 37, an HDD of an external server accessible via the second communication unit 38, etc. The display unit 40 is a part that displays the time information and position information transmitted via the communication device 30 and the input supplementary information by the application program. On the display unit 40, the information is clearly displayed in a form such as a table by the application program. By clearly displaying the time information, position information, and supplementary information on the display unit 40 in this way, the work already carried out and the work not yet carried out in the field can be accurately confirmed, and the soil collection work can be carried out reliably and without error.

[0077] Also, the application program prints the time information, position information, and supplementary information on a label with the label printer 36. thingIt is possible. The label printer 36 is either installed in the soil sampler 1 or carried by the user. For the label printer 36, a printer connected via a network (network printer) may be used. The label printed by the label printer 36 is preferably capable of being attached to the sample bag with an adhesive or the like. A plurality of labels can be prepared with different colors and patterns.

[0078] If a label printed with time information, location information, and supplementary information is attached to the sample bag, it is possible to prevent misidentification of the sample bag. Sample bags containing soil often have similar appearances and are prone to confusion mistakes such as being mistakenly misidentified as another sample bag. In particular, when multiple sample bags containing the soil collected by the hook 27 described above are hung, confusion mistakes are likely to occur frequently due to the similarity in appearance. However, if a label printed with management information is attached to the sample bag, such confusion mistakes can be avoided. Therefore, when using the sample bag in a state where it is hung on the hook 27, it is particularly preferable to provide the information management unit described above in advance.

[0079] Note that the mobile terminal device 37 can also perform wireless communication with the server 41 using the second communication unit 38 via short-range wireless communication, a data communication network, or a mobile phone communication network. The server 41 (for example, a site for farm management support such as Kubota Smart Agri System) stores software for performing field management, fertilization management, work management, work record, and work progress management. By accessing the server 41 using the mobile terminal device 37, the software can be downloaded and used. If it is possible to access an external server 41 and use each software in this way, the time information, location information, and supplementary information can be utilized in application programs for field management, fertilization management, work management, work record, and work progress management.

[0080] For example, if data on time information, location information, and supplementary information, and data on each component after soil analysis can be obtained, the fertilizer components lacking in the field can be determined, and the type and application rate of fertilizer for supplementing the deficiency can be calculated. Thus, it becomes possible to perform field management and fertilization management more accurately. Also, if the type and application rate of fertilizer can be calculated, it becomes possible to make a more accurate work plan, and work records and work progress management also become easier to perform.

[0081] According to the soil sampler 1 of the above-described embodiment, the following effects can be achieved. The soil sampler 1 includes a first plate 2 and a second plate 3 disposed at a distance in the horizontal direction from the first plate 2. When the first plate 2 and the second plate 3 are pushed into the ground while being rotated, a collecting portion 4 into which the soil collected between the first plate 2 and the second plate 3 enters, a rotating body 5 provided in the collecting portion 4 and applying a rotational force for rotating the first plate 2 and the second plate 3, and a changing mechanism 6 for changing between a first state in which the lower end of the first plate 2 and the lower end of the second plate 3 are in contact or close to each other and a second state in which the lower end of the first plate 2 and the lower end of the second plate 3 are separated from each other.

[0082] According to this configuration, the soil sampler 1 of the present embodiment can hold the collected soil in the collecting portion 4 between the first plate 2 and the second plate 3 by changing the positional relationship between the first plate 2 and the second plate 3 from the second state to the first state by the changing mechanism 6. Also, by moving the soil sampler 1 upward while keeping the soil in the collecting portion 4 (while in the first state), the collected soil can be pulled up to the ground. Further, the soil sampler 1 of the present embodiment can drop the soil held in the collecting portion 4 by changing the positional relationship between the first plate 2 and the second plate 3 from the first state to the second state by the changing mechanism 6, and the collected soil can be collected into a collection container 8 or the like.

[0083] That is, in the soil sampler 1 of the present embodiment, when the first plate 2 and the second plate 3 are pushed into the ground while rotating, the soil is retained between the first plate 2 and the second plate 3 in the ground, and the soil can be collected by being pulled up from the ground in the first state. Further, the soil sampler 1 can take out the soil sandwiched between the first plate 2 and the second plate 3 by changing the first plate 2 and the second plate 3 from the first state to the second state by the changing mechanism 6. As a result, the soil sampler 1 of the present embodiment can collect the soil in the ground, reliably pull up the collected soil in a sandwiched state, and collect it in a recovery container 8, a sample bag, or the like.

[0084] When the soil sampler 1 is pushed into the ground while rotating the first plate 2 and the second plate 3, the soil is retained between the first plate 2 and the second plate 3 in the ground and is pulled up from the ground in the first state. According to this configuration, the collection part 4 formed in the soil sampler 1 of the present embodiment is sandwiched between the first plate 2 and the second plate 3, so that the soil can be stably retained. Further, by rotating the first plate 2 and the second plate 3 pushed into the ground, the soil surely flows into the collection part 4. Therefore, it is possible to surely collect the soil in the ground into the collection part 4, stably retain the collected soil in the collection part 4, and pull it up from the soil.

[0085] The soil sampler 1 takes out the soil sandwiched between the first plate 2 and the second plate 3 by changing the first plate 2 and the second plate 3 from the first state to the second state by the changing mechanism 6. According to this configuration, in the second state, since the first plate 2 and the second plate 3 are separated, it is possible to surely drop the soil retained in the collection part 4. As a result, in the soil sampler 1, it is possible to surely collect the soil pulled up from the ground into a recovery container 8, a sample bag, or the like.

[0086] Further, the first plate 2 extends vertically with a distance from the axis of the rotating body 5 to the outside, and the second plate 3 extends downward along the axis of the rotating body 5 and is formed in an inclined shape toward the lower end of the first plate 2 at the tip of the downward extension. According to this configuration, when the rotating body 5 is rotated around its axis, the first plate 2 rotates at a distance outside the axis of the rotating body 5, and the soil is cut in a cylindrical surface shape around the axis of the rotating body 5. On the other hand, since the lower part of the second plate 3 is formed in an inclined shape toward the lower end of the first plate 2, it becomes possible to shear and collapse the soil by rotating it around the axis of the rotating body 5. As a result, when the first plate 2 and the second plate 3 are rotated around the axis of the rotating body 5, the soil can be excavated in the same manner as when using a screw-shaped drill or the like.

[0087] Further, the second plate 3 is arranged so as to have an approach angle with respect to the rotation direction R of the rotating body 5. According to this configuration, when the rotating body 5 is rotated around an axis facing the vertical direction, the lower part of the second plate 3 can not only shear the soil but also push up the sheared soil upward. The pushed-up soil flows into the collection part 4 described later. And since the soil collection tool 1 itself moves downward by the amount of the pushed-up soil, the soil collection tool 1 can advance downward while excavating the soil in the same manner as when using a screw-shaped drill or the like.

[0088] Further, between the rotating body 5 and the collection part 4, a pressing plate 7 is formed that suppresses the insertion of the collection part 4 into the ground by contacting the ground surface. According to this configuration, when the pressing plate 7 contacts the ground surface, the collection part 4 is suppressed from being inserted into the ground deeper than the required depth. The soil collection tool 1 is provided with an adjustment mechanism 14 capable of adjusting the vertical position of the pressing plate 7 with respect to the rotating body 5.

[0089] According to this configuration, the adjustment mechanism 14 enables the vertical position of the pressing plate 7 with respect to the rotating body 5 to be changed and adjusted upward or downward. The pressing plate 7 suppresses the intrusion of the soil collection tool 1 into the ground by contacting the ground surface. Therefore, when the vertical position of the pressing plate 7 is changed upward or downward by the adjustment mechanism 14, the depth of the collection part 4 from the ground surface can be changed, and the depth of the collected soil from the ground surface can be arbitrarily changed.

[0090] Further, the adjustment mechanism 14 has an inner cylinder 10 which is inserted inside the rotating body 5 and has a first through hole 17 penetrating the peripheral wall, and a pin 15 for positioning the inner cylinder 10 with respect to the rotating body 5. The inner cylinder 10 is disposed above the pressing plate 7 and is movable vertically integrally with the pressing plate 7 along the rotating body 5. A plurality of second through holes 18 are formed in the rotating body 5 side by side in the axial direction of the rotating body 5. When the inner cylinder 10 is moved along the rotating body 5, any one of the plurality of second through holes 18 communicates with the first through hole 17. The pin 15 is inserted into the first through hole 17 and the second through hole 18 in a state where the first through hole 17 and the second through hole 18 communicate with each other.

[0091] According to this configuration, the vertical position of the pressing plate 7 with respect to the rotating body 5 can be changed and adjusted upward or downward. Specifically, two second through holes 18 are formed in the peripheral wall of the rotating body 5 with different vertical positions. When the first through hole 17 of the inner cylinder 10 communicates with the upper second through hole 18U of the rotating body 5, the pin 15 communicates the first through hole 17 and the upper second through hole 18U, and positions the lower body 5D of the rotating body 5 with respect to the inner cylinder 10. The pin 15 is removed from the first through hole 17 and the second through hole 18, and the inner cylinder 10 is moved downward with respect to the rotating body 5. Then, the first through hole 17 of the inner cylinder 10 comes into communication with the lower second through hole 18D of the rotating body 5. When the first through hole 17 and the lower second through hole 18D communicate with each other, the pin 15 is inserted into both the first through hole 17 and the lower second through hole 18D to position the lower body 5D of the rotating body 5 with respect to the inner cylinder 10. In this way, the vertical position of the pressing plate 7 with respect to the rotating body 5 can be changed and adjusted downward by using the adjustment mechanism 14.

[0092] When the vertical position of the pressing plate 7 with respect to the rotating body 5 is changed and adjusted upward by using the adjustment mechanism 14, the vertical position of the pressing plate 7 with respect to the rotating body 5 can be changed and adjusted upward by performing the reverse procedure of the above-described procedure. Also, between the first plate 2 and the second plate 3, there is provided a pressing plate 22 that moves downward when the sampling part 4 is in the first state, and presses the soil sandwiched between the first plate 2 and the second plate 3. On the rotating body 5, a lever 16 that pushes the pressing plate 22 downward is provided.

[0093] According to this configuration, the soil collected by the sampling part 4 can be pressed, and the fall of the soil from the sampling part 4 can be more reliably suppressed. Specifically, the left end of the lever 16 is connected to a cylindrical base part 26, and a transmission plate 25 is provided on the outer peripheral surface on the left side of the base part 26. On the other hand, a lifting plate 24 is connected to the transmission plate 25, and a pressing plate 22 is attached to the lifting plate 24 via a connecting plate 23.

[0094] Therefore, when the lever 16 is pushed downward, the cylindrical base part 26 moves downward in a state of being inserted into the lower body 5D of the rotating body 5. Then, the transmission plate 25 fixed to the outer peripheral surface of the base part 26 moves downward, and the lifting plate 24 connected to the transmission plate 25 also moves downward. Since the pressing plate 22 is attached to the lifting plate 24 via the connecting plate 23, the pressing plate 22 can descend and push the collected soil downward, and compress the soil in the sampling part 4.

[0095] Also, at the upper end of the first plate 2, a hinge part 11 that supports the first plate 2 so as to be swingable is provided. Between the first plate 2 and the second plate 3 below the hinge part 11, a biasing member 12 that applies a biasing force in the direction in which the first plate 2 approaches the second plate 3 is provided. The changing mechanism 6 is provided at the upper part of the first plate 2 and is composed of an opening lever 13 that separates the first plate 2 from the second plate 3 against the biasing force of the biasing member 12.

[0096] According to this configuration, the lower end of the opening lever 13 is fixed to the first plate 2 that can swing by the hinge portion 11. Therefore, when the upper part of the opening lever 13 swings to the right, the upper part of the opening lever 13 moves in a direction approaching the rotating body 5. Also, when the first plate 2 located on the opposite side of the upper part of the opening lever 13 across the hinge portion 11 swings to the left opposite to the upper part of the opening lever 13, the first plate 2 separates from the second plate 3, and the positional relationship between the first plate 2 and the second plate 3 changes to the second state. Note that since the biasing member 12 is provided between the first plate 2 and the second plate 3 below the hinge portion 11, a biasing force in a direction approaching the second plate 3 is constantly applied to the first plate 2. Therefore, when swinging the upper part of the opening lever 13 to the right, it is necessary to resist the biasing force of the biasing member 12. However, when swinging the upper part of the opening lever 13 to the left, the opening lever 13 automatically swings by the biasing force and returns to the state before swinging to the right.

[0097] The soil sampler 1 includes a hook 27 for hooking a sample bag for storing the collected soil. According to this configuration, a plurality of bags containing soil samples can be suspended from the hook 27. That is, in the soil sampler 1 of the present embodiment, while the soil sample is hung on the hook 27, the operator who performs the soil collection work can also engage in carrying the sample, enabling labor saving and efficiency improvement in soil collection.

[0098] The embodiments disclosed this time should be considered as illustrative in all respects and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and all modifications within the meaning and scope equivalent to the claims are intended to be included. For example, in the above-described embodiment, an example where the time recording device 34 is attached to the soil sampler 1 was given. However, instead of the time recording device 34, time information can also be acquired from the network environment via wireless communication.

[0099] In the above-described embodiment, an example was given in which time information, position information, and supplementary information are printed on a label using the label printer 36. However, instead of a label, a QR code (registered trademark), a barcode, or the like may be used, and instead of the label printer 36, a QR code (registered trademark) printer or a barcode printer may be used to print the time information, position information, and supplementary information in a coded state.

Explanation of Signs

[0100] 1 Soil sampler 2 First plate 2a First piece 2b Second piece 2c Third piece 3 Second plate 3U Upper part of the second plate 3D Lower part of the second plate 4 Sampling part 5 Rotating body 5U Upper body 5D Lower body 6 Changing mechanism 7 Pressing plate 8 Collection container 9 Gripping part 10 Inner cylinder 11 Hinge part 11a Oscillating piece of the hinge part 11b Oscillating piece of the other hinge part 12 Biasing member 13 Release lever 14 Adjusting mechanism 15 Pin 16 Lever 17 First through hole 18 Second through hole 18U Upper second through hole 18D Lower second through hole 19L Left-handed gripping cover 19R Right-handed gripping cover 20 Connector 21 Fastener 22 Pressing plate 23 Connecting plate 24 Lifting plate 25 Transmission plate 26 Base 27 Hook 28 Collection detection unit 29 Recording switch 30 Communication device 31 Positioning device 32 Receiver 33 Inertial measurement unit 34 Time recording unit 35 Memory unit 36 Label printer 37 Mobile terminal device 38 Second communication unit 39 Control unit 40 Display unit 41 Server 50 Information management unit M Soil R Rotation direction RA Axis of the rotating body

Claims

1. A first plate and a second plate disposed at a horizontal distance from the first plate, and a collection part into which soil collected between the first plate and the second plate when the first plate and the second plate are pushed into the ground while being rotated, a rotating body provided in the collection part and applying a rotational force for rotating the first plate and the second plate, and a changing mechanism for changing between a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close proximity, and a second state in which the lower end of the first plate and the lower end of the second plate are separated, comprising: the first plate extends vertically at a distance outward from the axis of the rotating body, the second plate extends downward along the axis of the rotating body and is formed in an inclined shape toward the lower end of the first plate at the tip extending downward, the second plate is a soil collection tool arranged to have an approach angle with respect to the rotation direction of the rotating body.

2. A first plate and a second plate disposed at a horizontal distance from the first plate, and a collection part into which soil collected between the first plate and the second plate when the first plate and the second plate are pushed into the ground while being rotated, a rotating body provided in the collection part and applying a rotational force for rotating the first plate and the second plate, and a changing mechanism for changing between a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close proximity, and a second state in which the lower end of the first plate and the lower end of the second plate are separated, comprising: between the first plate and the second plate, when the collection part is in the first state, a pressing plate is provided which moves downward to press the soil sandwiched between the first plate and the second plate, and a lever for pressing the pressing plate downward is provided on the rotating body. Soil collection tool.

3. A first plate and a second plate disposed at a horizontal distance from the first plate, and a collection part into which soil collected between the first plate and the second plate when the first plate and the second plate are pushed into the ground while being rotated, a rotating body provided in the collection part and applying a rotational force for rotating the first plate and the second plate, and a changing mechanism for changing between a first state in which the lower end of the first plate and the lower end of the second plate are in contact or close proximity, and a second state in which the lower end of the first plate and the lower end of the second plate are separated, comprising: a hinge portion that supports the first plate so as to be able to swing freely is provided at an upper end of the first plate, and a biasing member that applies a biasing force in a direction in which the first plate approaches the second plate is provided between the first plate and the second plate below the hinge portion; The change mechanism is provided on the upper part of the first plate and is configured with an opening lever that moves the first plate away from the second plate against the biasing force of the biasing member. Soil sampling equipment.

4. A soil collecting tool as described in any one of claims 1 to 3, wherein when the first plate and the second plate are rotated and pushed into the ground, the soil is trapped between the first plate and the second plate in the ground, and the soil is collected by being pulled up from the ground in the first state.

5. A soil collection tool as described in claim 4, which removes soil sandwiched between the first plate and the second plate by changing the first state and the second plate from the first state to the second state using the change mechanism.

6. A pressing plate is formed between the rotor and the collecting part to prevent the collecting part from being inserted into the ground by contacting the ground surface. The soil sampler according to any one of claims 1 to 5.

7. 7. The soil sampler according to claim 6, further comprising an adjustment mechanism for adjusting the vertical position of the pressure plate relative to the rotor.

8. the adjustment mechanism includes an inner cylindrical body having a first through-hole formed through a peripheral wall thereof and inserted inside the rotating body, and a pin for positioning the inner cylindrical body relative to the rotating body, the inner cylinder is disposed above the pressing plate and is movable vertically along the rotating body together with the pressing plate; The rotor has a plurality of second through holes formed in a line in the axial direction of the rotor, When the inner cylindrical body is moved along the rotating body, any one of the plurality of second through holes communicates with the first through hole, The soil sampler according to claim 7 , wherein the pin is inserted into the first through hole and the second through hole in a state where the first through hole and the second through hole are in communication with each other.

9. A hook is provided for hanging a sample bag containing the collected soil. The soil sampler according to any one of claims 1 to 8.

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