JP7144366B2 - Soil sampling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a soil sampling device for sampling soil such as a field.

Conventionally, a soil sampling device disclosed in Patent Document 1 is known.
The soil sampling device disclosed in Patent Literature 1 includes a cylindrical portion that is pushed into the ground to accommodate soil therein, and a transmission portion that transmits rotational force to the cylindrical portion. This soil sampling device has a soil intake at the bottom of the cylindrical portion, and the soil stored in the cylindrical portion through the intake is taken out from the same intake.

JP-A-2002-286593

However, in the soil sampling apparatus disclosed in Patent Document 1, there are cases where the tubular portion is not sufficiently filled with soil due to the skill of the extractor or the quality of the soil. It is easy to generate, and it is difficult to collect a fixed amount of soil accurately.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a soil sampling apparatus capable of accurately sampling a fixed amount of soil.

A soil sampling device according to an aspect of the present invention includes a sampling tube for sampling soil and a pusher for pushing out the soil sampled in the sampling tube, wherein the sampling tube is an intake for taking in the soil. and an outlet for taking out the soil taken in from the inlet, the inlet opening facing one of the axial directions of the sampling tube, and the outlet intersecting the axial direction. The pusher pushes out the soil from the outlet.

Preferably, the outlet includes a pair of outlets arranged to face each other, and the pusher moves from one of the pair of outlets to the other to push out the soil.
Preferably, the soil sampling device includes an elevating mechanism for elevating the sampling tube, and the elevating mechanism moves the sampling tube to a sampling position where soil is sampled in the soil and an extraction position where the soil is pushed out by the pushing tool. and move to

Preferably, the soil sampling device includes a container for receiving the soil extruded by the pushing tool, the container has a receiving port for receiving the soil, and the pushing tool penetrates the receiving port through the receiving port. to guide the soil to the receiving port.
Preferably, the container has a plurality of storage sections partitioned by partition walls, each of the plurality of storage sections has the receiving port, and each receiving port is sequentially moved to an insertion position where the pusher can be inserted. do.

Preferably, the soil sampling device includes an interlocking mechanism for moving the receiving port to the insertion position in conjunction with the elevation of the sampling tube from the sampling position to the extraction position.
Preferably, the container is rotatable around a central axis parallel to the direction of movement of the pusher, and the plurality of storage sections are arranged circumferentially around the central axis and rotate around the central axis. By rotating to the above-mentioned insertion position sequentially.

Preferably, the soil sampling device includes a moving mechanism for moving the pushing tool to a first position for pushing soil from the outlet and a second position for removing from the outlet, wherein the moving mechanism an urging member that urges the pushing tool in the direction to move it to the first position; a holding state that holds the pushing tool at the second position against the urging force of the urging member; and a holding state that releases the holding. and a switching unit for alternately switching between the released state and the released state.

According to the above-mentioned soil sampling apparatus, of the soil taken into the sampling pipe from the intake port, only the soil at the position facing the extraction port can be pushed out by the pushing tool and taken out, so that a certain amount of soil can be accurately collected. It is possible to collect.

1 is a side view showing an example of a working vehicle equipped with a soil sampling device; FIG. FIG. 4 is a side view showing the soil sampling device having the first lifting mechanism, showing a state in which the sampling tube is in the lowered position (sampling position). It is a partial cross-sectional front view which shows the soil sampling apparatus provided with the 1st raising/lowering mechanism. FIG. 10 is a side view showing the soil sampling device provided with the first lifting mechanism, showing a state in which the sampling tube is in the raised position (extraction position). FIG. 10 is a side view showing the soil sampling device provided with the second elevating mechanism, showing a state in which the sampling tube is in the lowered position (sampling position). It is a partial cross-sectional front view which shows the soil sampling apparatus provided with the 2nd raising/lowering mechanism. FIG. 10 is a side view showing the soil sampling device having the second elevating mechanism, showing a state in which the sampling tube is in the raised position (extraction position). FIG. 10 is a side view showing the soil sampling device provided with a cover member that closes the inlet, showing a state in which the sampling tube is in the lowered position (sampling position). Fig. 10 is a side view of the soil sampling device having a cover member for closing the inlet, showing a state in which the sampling tube is in the standby position; FIG. 10 is a side view showing the soil sampling device having a cover member that closes the inlet, showing a state in which the sampling tube is in the raised position (extraction position). FIG. 10 is a side view showing the soil sampling device provided with a cover member for closing the discharge port, showing a state in which the sampling tube is in the lowered position (sampling position) and a state in which it is in the standby position. FIG. 10 is a side view showing the soil sampling device provided with a cover member that closes the discharge port, showing a state in which the sampling tube is in the raised position (extraction position). FIG. 10 is a diagram showing an embodiment in which the cover member is an opening/closing plate capable of opening or closing the inlet by swinging; FIG. 10 is a diagram showing an embodiment in which the cover member is an opening/closing plate capable of opening or closing the discharge port by swinging; FIG. 15 is a diagram showing an embodiment in which the configuration shown in FIG. 13 and the configuration shown in FIG. 14 are combined; Fig. 2 is a side view of the soil sampling device showing the configuration of the pusher, the container, the interlocking mechanism, etc., and shows the state in which the sampling tube is in the lowered position (sampling position). FIG. 2 is a partially cross-sectional front view of the soil sampling device showing the configuration of the pushing tool, the container, the interlocking mechanism, and the like. FIG. 18 is an enlarged view of a part of FIG. 17; It is a figure which shows the structure of the moving mechanism of a pusher. It is a figure explaining the effect|action (operation|movement) of a switching part. It is a figure explaining the effect|action (operation|movement) of a switching part. It is a figure explaining the effect|action (operation|movement) of a switching part. It is a figure explaining the effect|action (operation|movement) of a switching part. Fig. 2 shows a part of the container and the interlocking mechanism; It is a figure which shows some interlocking mechanisms. It is a figure explaining an effect|action (operation) of an interlocking mechanism. It is a figure explaining an effect|action (operation) of an interlocking mechanism. It is a figure explaining an effect|action (operation) of an interlocking mechanism. FIG. 11 is a side view showing a working vehicle equipped with a soil sampling device including a moving mechanism according to a second embodiment; FIG. 11 is a side view showing the second embodiment of the pusher moving mechanism, showing a state in which the operation lever is positioned rearward. FIG. 10 is a partial cross-sectional rear view showing a second embodiment of a moving mechanism for the pusher; FIG. 11 is a side view showing the second embodiment of the pusher moving mechanism, showing a state in which the operation lever is swung forward. The state in which the rotary tiller is raised with respect to the vehicle body of the tractor is shown. FIG. 11 shows another embodiment of a soil sampling tool (sampling tube); FIG. 11 shows another embodiment of a soil sampling tool (sampling tube); FIG. 11 shows another embodiment of a soil sampling tool (sampling tube); FIG. 11 shows another embodiment of a soil sampling tool (sampling tube); FIG. 11 shows another embodiment of a soil sampling tool (sampling tube); FIG. 11 shows another embodiment of a soil sampling tool (sampling tube);

FIG. 1 is a side view showing one embodiment of a soil sampling device 1 according to the present invention.
In the following description, the direction of arrow X1 in FIG. 1 is referred to as the front, the direction of arrow X2 is referred to as the rear, and the direction of arrow X is referred to as the front-rear direction. A horizontal direction perpendicular to the front-rear direction X (perpendicular to the paper surface) is referred to as a device width direction.
As shown in FIG. 1, the soil sampling device 1 is attached to the traveling body 2. As shown in FIG. The soil sampling device 1 samples soil by moving together with the traveling body 2 . In the case of this embodiment, the traveling body 2 is a tractor. Although the traveling body 2 is not limited to a tractor, the traveling body 2 is assumed to be the tractor 2 in the following description. The front side of the driver sitting on the driver's seat 3 mounted on the vehicle body 6 of the tractor 2 is the front side, and the rear side of the driver is the rear side. Further, the width direction of the tractor 2 is the device width direction.

The tractor 2 is equipped with a ground working machine 4 for working (agricultural work) on a field. Hereinafter, the tractor 2 equipped with the ground working machine 4 will be referred to as a work vehicle. A soil sampling device 1 is attached to the ground working machine 4 . In the case of this embodiment, the ground working machine 4 is a rotary tiller for tilling a field. Although the ground working machine 4 is not limited to a rotary tiller, the ground working machine 4 is assumed to be a rotary tiller 4 in the following description. In the case of this embodiment, the soil sampling device 1 is indirectly attached to the traveling body 2 via the rotary tiller (ground working machine) 4, but the soil sampling device 1 is directly attached to the traveling body 2. You may

As shown in FIG. 1 , the rotary tiller 4 is attached to the rear portion of the vehicle body 6 of the tractor 2 via a link mechanism 5 and can be raised and lowered with respect to the vehicle body 6 of the tractor 2 . The rotary tiller 4 has an input shaft 10 that receives power from a PTO shaft 9 projecting from the rear portion of the vehicle body 6 of the tractor 2 . The PTO shaft 9 and the input shaft 10 are connected by a universal joint (not shown).

Power input to the input shaft 10 is transmitted to the pawl shaft 12 via a power transmission mechanism such as a gear mechanism housed in the transmission case 11 . The pawl shaft 12 rotates around an axis extending in the width direction of the device. A tillage tine 13 is attached to the tine shaft 12 . The tillage tines 13 rotate in the arrow A1 direction together with the tine shaft 12 to rake up the soil rearward. A tilling section 14 is constituted by the claw shaft 12 and the tilling claw 13 .

The upper part of the plowing section 14 is covered with an upper cover 7 . The rear part of the tilling section 2 is covered with a rear cover (not shown). The sides (left and right sides) of the plowing section 2 are covered with side covers (not shown).
<Collection tube>
As shown in FIGS. 1 to 7, the soil sampling device 1 has a sampling tube 15 which is a soil sampling tool for sampling soil. The sampling pipe 15 moves in the soil and samples the soil.

The collection tube 15 has an intake 16 capable of taking in soil and an outlet 17 capable of discharging the soil taken in from the intake 16 . The sampling tube 15 is open at both ends, one end forming an intake port 16 and the other end forming an outlet port 17 . The inlet 16 and the outlet 17 are arranged side by side in the axial direction C<b>1 of the collection tube 15 .
The sampling pipe 15 is placed under the ground G1 (see FIGS. 1 and 2) and moves along with the running of the tractor 2 to take in soil from an inlet 16 and discharge the soil from an outlet 17. .

In the case of the present embodiment, the sampling tube 15 is arranged with the axial direction C1 facing the horizontal direction (parallel to the ground G1). In other words, the centerline connecting the center of the inlet 16 and the center of the outlet 17 is arranged horizontally. Therefore, the inlet 16 and the outlet 17 are arranged side by side in the front-rear direction. The sampling tube 15 has an inlet 16 and an outlet 17 arranged side by side in the moving direction of the tractor 2 (which is also the moving direction of the sampling tube 15).

The collection tube 15 may be inclined upward or downward with respect to the horizontal direction in the axial direction C1. However, in order to smoothly take in the soil from the intake port 16 and discharge the soil from the discharge port 17 along with the movement of the sampling pipe 15, it is necessary that the axial direction C1 is oriented horizontally. more preferred.
The collection tube 15 is cylindrical, and the tip (front end) where the inlet 16 opens is inclined with respect to the horizontal direction (the axial direction C1). That is, the collection tube 15 has a shape in which the front part of the cylinder is obliquely cut. The direction of inclination (the direction of the notch) is a direction (diagonally downward forward) that gradually shifts forward as it goes downward from above.

The collection pipe 15 also has an extraction port 18 for taking out the soil taken in from the intake port 16 . The intake port 16 opens in one axial direction of the sampling tube 15 , while the extraction port 18 opens in a direction crossing the axial direction of the sampling tube 15 . Specifically, the outlet 18 opens in a direction orthogonal to the axial direction C1 of the collection tube 15 . In the case of this embodiment, the outlet 18 has a circular shape, but is not limited to a circular shape. As shown in FIG. 3, the outlet 18 includes a pair of outlets 18a, 18b. The pair of outlets 18a and 18b are arranged side by side in the axial direction orthogonal to the axial direction C1 of the sampling tube 15 so as to face each other. The outlets 18a and 18b have the same shape and size.

The shape of the sampling tube 15 is not limited to the shape shown in FIGS. 1 to 7, and may be changed to another shape within the range where the positional relationship of the intake port 16, the discharge port 17, and the extraction port 18 described above is not changed. is possible. For example, although the sampling tube 15 of the present embodiment has a circular cross-sectional shape in the direction perpendicular to the axial direction, the cross-sectional shape may be polygonal (triangular, quadrangular, hexagonal, etc.). Also, other shapes, which will be described later, may be used.
<Lifting mechanism>
As shown in FIGS. 1 to 7, the soil sampling device 1 has an elevating mechanism 20 for elevating the sampling tube 15. As shown in FIGS.

The elevating mechanism 20 can elevate the sampling tube 15 between a lowered position P1 positioned below the ground G1 and an elevated position P2 positioned above the ground G1 (see solid lines and virtual lines in FIG. 1). The descending position P1 is the soil sampling position (the depth position at which the soil is sampled). The raised position P2 is a take-out position (height position at which the soil is taken out), which is above the collecting position and where the collected soil is taken out. Hereinafter, the lowered position P1 may be referred to as the collection position P1, and the raised position P2 may be referred to as the extraction position P2.

As shown in FIG. 2, the elevating mechanism 20 has a fixed body 21, a drive mechanism 22, and an elevating body .
As shown in FIG. 1, the stationary body 21 is attached to the tractor 2 . More specifically, the fixed body 21 is attached to the rotary tiller 4 attached to the rear portion of the tractor 2 . Thus, the lifting mechanism 20 is attached to the rotary tiller (ground working machine) 4 attached to the rear portion of the tractor 2 .

Specifically, the fixed body 21 is detachably attached to the front portion of the side surface of the upper cover 7 with a fastener such as a bolt. Thereby, the fixed body 21 is fixed in its vertical position with respect to the tractor 2 . The soil sampling device 1 is arranged behind the tractor 2 and in front of the plowing section 14 .
As shown in FIGS. 2 and 3, a roller member 24 is attached to the fixed body 21 . In the case of this embodiment, the roller member 24 is a bearing having an inner ring fixed to a support shaft 28 and an outer ring rotatable. A plurality (two) of the roller members 24 are arranged at intervals in the lifting direction of the lifting body 23 (direction of arrow A2 in FIG. 2).

The fixed body 21 has an extending portion 21a extending forward from the upper cover 7 . A drive mechanism 22 and an elevating body 23 are attached to the extending portion 21a.
The drive mechanism 22 is a mechanism for raising and lowering the elevating body 23 . The drive mechanism 22 has a drive source 25 , a drive gear 26 rotated by power from the drive source 25 , and a transmission mechanism 27 that transmits power from the drive source 25 to the drive gear 26 . In the case of this embodiment, the drive source 25 is a motor 25 having an output shaft rotatable in forward and reverse directions. The transmission mechanism 27 has a first gear 29 and a second gear 30 . The first gear 29 is attached to the output shaft of the motor 25 . The second gear 30 meshes with the first gear 29 . The second gear 30 is a reduction gear and has more teeth than the first gear 29 . The drive gear 26 is attached to the same shaft 37 as the second gear 30 and rotates integrally with the second gear 30 . The drive gear 26 has fewer teeth than the second gear 30 . The shaft 37 is supported by a support 38 attached to the fixed body 21 .

The lifting body 23 is provided so as to be able to move up and down with respect to the fixed body 21 . The lifting body 23 is a thin plate-shaped member extending in the vertical direction (lifting direction A2), and is arranged with one surface facing left and the other surface facing right. As shown in FIG. 3, the thickness of the lifter 23 is smaller than the outer diameter of the collection tube 15 . One surface of the lifting body 23 is in contact with or close to the fixed body 21 . A cover plate 32 is provided in contact with or in close proximity to the other surface of the lifting body 23 .

The lifting body 23 is arranged to be inclined with respect to the ground G1. Specifically, the lifting body 23 is inclined forward as it goes downward. However, the lifting body 23 may be arranged perpendicular to the ground G1. The elevation direction A2 of the elevation body 23 is the direction in which the elevation body 23 extends. In the case of FIG. 2, the elevation direction A2 is diagonally forward downward and diagonally rearward upward. When the lifting body 23 is arranged perpendicular to the ground G1, the lifting direction A2 is upward or downward perpendicular to the ground G1.

The upper part of the lifting body 23 is attached to the fixed body 21 so as to be able to move up and down. A collection tube 15 is attached to the lower end of the lifting body 23 .
As shown in FIG. 2 and the like, the lifting body 23 has a plurality of teeth 23a arranged along the lifting direction A2 along the rear edge. Teeth 23 a arranged in rows on the lifting body 23 mesh with the teeth of the drive gear 26 . The elevating body 23 is formed with a housing hole 23 b capable of housing the roller member 24 . The accommodation hole 23b is formed in an oval shape that is long in the moving direction of the lifting body 23 (lifting direction A2). A plurality (two) of roller members 24 are accommodated in the accommodation hole 23b. The outer peripheral surface of the roller member 24 is in contact with the inner surface of the accommodation hole 23b. The roller member 24 accommodated in the accommodation hole 23 b is arranged at a position sandwiched between the fixed body 21 and the cover plate 32 . The roller member 24 changes its position in the accommodation hole 23b as the elevating body 23 moves up and down. Specifically, when the lifting body 23 is at the lowered position P1, the roller member 24 is at an upper position within the accommodation hole 23b (see FIG. 2). When the elevating body 23 is at the elevated position P2, the roller members 24 are at a lower position within the accommodation hole 23b (see FIG. 4).

Here, the action (operation) of the lifting mechanism 20 will be described.
When the drive source (motor) 25 is driven to rotate the output shaft in the forward direction (direction of arrow A31 in FIG. 2) from the state in which the sampling tube 15 shown in FIG. 2 is at the lowered position P1, the first gear 29 rotates rotate in the direction The rotation of the first gear 29 is transmitted to the driving gear 26 via the second gear 30, and the driving gear 26 rotates in the arrow A41 direction. The rotation of the driving gear 26 raises the lifting body 23 . As a result, the lifting body 23 moves to the raised position P2, and the sampling tube 15 is lifted above the ground G1 (see FIG. 4).

When the drive source 25 is driven to rotate the output shaft in the opposite direction (arrow A32 direction in FIG. 4) from the state where the collection tube 15 shown in FIG. 4 is at the raised position P2, the drive gear 26 rotates in the arrow A42 direction. Then, the lifting body 23 descends. As a result, the lifting body 23 moves to the lowered position P1, and the sampling tube 15 is buried below the ground G1 (under the ground) (see FIG. 2).
The depth (set depth) when the sampling tube 15 is at the lowered position P1 is adjusted by adjusting the length of the elevating body 23, the length of the housing hole 23b, the number of teeth 23a arranged in a row on the elevating body 23, and the like. can be set arbitrarily. As a result, the depth when the extraction tube 15 is at the lowered position P1 can be set to a desired depth.

A method of sampling soil with the sampling tube 15 using the lifting mechanism 20 is as follows.
First, as shown in FIG. 2, the tractor 2 is driven while the sampling tube 15 is in a lowered position P1 at a desired depth (set depth) below the ground surface G1. Then, since the inlet 16 and the outlet 17 of the sampling tube 15 are arranged side by side in the axial direction C1, the soil is taken in from the inlet 16 of the sampling tube 15 and discharged from the outlet 17 (arrow D1 reference). Next, at a desired soil sampling location, the lifting mechanism 20 is driven to move the lifting body 23 to the raised position P2, and the sampling tube 15 is lifted above the ground G1. As a result, the soil of a desired depth stored in the sampling tube 15 can be sampled at a desired location.

If it is desired to continue collecting soil from another desired location, the lifting mechanism 20 is driven to move the lifting body 23 to the lowered position P1 to run the tractor 2, and the lifting mechanism 20 is driven at another desired location. Then, the lifting body 23 can be moved to the raised position P2. As a result, the soil stored in the sampling tube 15 at a desired depth can be sampled at another desired location.
In the above-described soil sampling work, since the thickness of the lifting body 23 is smaller than the outer diameter of the sampling tube 15, the resistance that the lifting body 23 receives from the soil can be reduced, and the sampling tube 15 can smoothly move at the lowered position P1. It is possible to move. The lifting body 23 may have a soil-cutting blade 23c (see FIG. 2) at a portion located under the ground when the sampling tube 15 is at the lowered position P1. The earth-cutting blade 23c is formed in a wedge shape that gradually becomes narrower toward the front (the front side in the running direction). By providing such a soil cutting blade 23c, the resistance that the lifting body 23 receives from the soil can be further reduced.

5 to 7 show another embodiment (second embodiment) of the lifting mechanism 20. FIG. Hereinafter, for convenience of explanation, the lift mechanism 20 of the second embodiment will be referred to as a second lift mechanism 20B, and the lift mechanism 20 of the above embodiment (first embodiment) will be referred to as a first lift mechanism 20A.
In the following description, the differences of the second lifting mechanism 20B from the first lifting mechanism 20A will be mainly described. About the structure which is common to 20 A of 1st raising/lowering mechanisms among the structures of the 2nd raising/lowering mechanism 20B, description is abbreviate|omitted except for one part. The configuration employed in the first elevating mechanism 20A can also be employed in the second elevating mechanism 20B as long as there is no inconvenience.

The second elevating mechanism 20B has a pipe 33 with a non-circular cross section attached to the fixed body 21 . The pipe 33 is composed of, for example, a square pipe with a square cross section. The pipe 33 extends in the elevation direction A2 of the elevation body 23 .
The drive mechanism 22 has a drive source 34 and a screw shaft 35 . The drive source 34 is a motor. The threaded shaft 35 is inserted through the pipe 33 . An upper end portion of the screw shaft 35 is connected to an output shaft 34 a of a drive source (motor) 34 via a coupling 36 . As a result, the screw shaft 35 is rotated around the central axis by the power from the drive source 34 .

The elevating body 23 is fitted in the pipe 33 so as to be non-rotatable around the central axis and movable along the pipe 33 . The lifting body 23 has an upper portion 231 and a lower portion 232 , and the upper portion 231 is fitted into the pipe 33 . The upper portion 231 has a non-circular cross-section like the pipe 33 . Since the upper portion 231 and the pipe 33 are non-circular in cross section, the lifting body 23 cannot rotate around the central axis. In the case of this embodiment, the upper part 231 of the lifting body 23 is made of a square pipe that is one size smaller than the pipe 33 . The elevating body 23 has a female threaded portion 233 that meshes with the threaded shaft 35 . The female threaded portion 233 is provided at the upper end of the upper portion 231 .

The lower part 232 is connected to the lower end of the upper part 231 . The lower part 232 is a plate-like member extending downward from the upper part 231, and is arranged with one surface facing left and the other surface facing right. A collection tube 15 is attached to the lower end of the lower portion 232 . As shown in FIG. 5, the lower portion of lower portion 232 is located below ground level G1 when collection tube 15 is in lower position P1. The lower part 232 may be provided with the earth-cutting blade 23c in the same manner as the first elevating mechanism 20A.

Here, the action (operation) of the second lifting mechanism 20B will be described.
When the drive source (motor) 34 is driven to rotate the output shaft 34a in the forward direction from the state where the extraction tube 15 shown in FIG. 5 is at the lowered position P1, the screw shaft 35 rotates in the same direction. Rotation of the screw shaft 35 is transmitted to the lifting body 23 via the female thread portion 233 . Then, since the pipe 33 and the upper part 231 of the lifting body 23 are formed to have a non-circular cross section, the lifting body 23 rises without rotating around the central axis. As a result, the lifting body 23 moves to the raised position P2, and the sampling tube 15 is lifted above the ground G1 (see FIG. 7).

When the drive source 34 is driven to rotate the output shaft 34a in the opposite direction from the state in which the collection tube 15 shown in FIG. 7 is at the raised position P2, the elevating body 23 descends. As a result, the lifting body 23 moves to the lowered position P1, and the sampling tube 15 is buried below the ground G1 (under the ground) (see FIG. 5).
Since the method of collecting soil with the collecting pipe 15 using the second elevating mechanism 20B is the same as the method of collecting soil using the first elevating mechanism 20A, the description thereof is omitted.

As described above, according to the soil sampling apparatus 1 of the above-described embodiment, the sampling tube 15 is moved to the desired depth below the ground at the lowering position P1, and the lifting mechanism 20 is driven at the desired location to lower the sampling tube 15. to a raised position P2 on the ground, soil can be easily collected at a desired location and at a desired depth.
The driving of the lifting mechanism 20 (driving of the driving source 34) can be performed by a driver seated in the driver's seat 3 of the tractor 2 by operating a switch. In this case, when the driver switches the switch to one side at a desired location where he/she wishes to collect soil, the lifting mechanism 20 is driven to move the lifting body 23 from the lowered position P1 to the raised position P2, thereby lifting the sampling tube 15. can be lifted. After the soil is collected, the operator switches the switch to the other side to drive the lifting mechanism 20 to move the lifting body 23 from the raised position P2 to the lowered position P1, thereby returning the sampling tube 15 to the ground again. can be buried.

The lifting mechanism 20 can be driven by another method instead of the driver operating the switch. For example, a time measuring device such as a timer or a clock and a control device for controlling the driving of the drive source 34 based on the time information measured by the time measuring device are used, and these devices are installed in the soil sampling device 1 or the tractor 2. As a result, the lifting mechanism 20 may be automatically driven to lift the lifting body 23 at predetermined time intervals. Further, the tractor 2 is equipped with a distance measuring device that measures the traveled distance, and the soil sampling device 1 or the tractor 2 is equipped with a control device that controls the driving of the drive source 34 based on the traveled distance measured by the distance measuring device. By doing so, the lifting mechanism 20 may be automatically driven to lift the lifting body 23 at predetermined travel distance intervals. Also, a storage device for storing a map of the field where the tractor 2 travels, a position detection device for detecting the traveling position of the tractor 2 based on positioning information from a positioning satellite or the like, and a desired soil sampling based on the map of the field. By equipping the soil sampling device 1 or the tractor 2 with an input device for inputting a location and a control device for controlling the driving of the driving source 34 based on the soil sampling position input by the input device, The lifting mechanism 20 may be automatically driven to lift the lifting body 23 at the soil sampling position.
<Lid member, etc.>
As shown in FIGS. 8 to 15, the soil sampling device 1 has a lid member 40. As shown in FIGS. The lid member 40 inhibits intake of soil from the intake port 16 between the collection position (lowered position) P1 and the take-out position (raised position) P2. "Between the picking position P1 and the picking position P2" means above the picking position P1 and below the picking position P2, and does not include the picking position P1. Although it is preferable to include the take-out position P2, it may not be included. The take-out position P2 is a position where soil is taken out from the collection tube 15 .

8 to 15 show a configuration in which the lid member 40 is provided on the soil sampling device 1 having the second elevating mechanism 20B. may be provided. 8 to 15, the elevating body 23 of the second elevating mechanism 20B is composed only of the upper part 231, but as shown in FIG. is more preferable. 8 to 10, the cover member 40 is applied to the sampling tube 15 whose axial direction C1 is inclined with respect to the horizontal direction. The lid member 40 may be applied to the collection tube 15 in which C1 is arranged horizontally.

The lid member 40 closes at least one of the intake port 16 and the discharge port 17 (hereinafter referred to as "opening 19") between the collection position P1 and the extraction position P2. As described above, the intake port 16 and the discharge port 17 are arranged side by side in the axial direction C1 of the sampling tube 15. Therefore, by closing the opening 19 of at least one of the intake port 16 and the discharge port 17, Soil uptake from inlet 16 can be inhibited.

The lid member 40 opens the opening 19 at the sampling position P1, and closes the opening 19 at least in the soil above the sampling position P1 (under the ground between the sampling position P1 and the ground G1). Preferably, the lid member 40 opens the opening 19 at the collection position P1 and closes the opening over the entire area between the collection position P1 and the removal position P2.
8 to 10 show a first embodiment of a mechanism (hereinafter referred to as "inhibition mechanism 41") that inhibits the intake of soil from the intake port 16 using the cover member 40. FIG. In the inhibition mechanism 41 (hereinafter referred to as “first inhibition mechanism 41A”) of the first embodiment, the lid member 40 closes the inlet 16 of the collection tube 15 . 8 to 10 show an example in which the first inhibition mechanism 41A is applied to the collection tube 15 whose axis is inclined with respect to the horizontal direction. The first inhibition mechanism 41A may be applied to the collection tube 15 that However, the end face of the sampling tube 15 that constitutes the opening 19 (intake port 16 and/or discharge port 17) on the side closed by the lid member 40 is arranged parallel to the elevation direction A2.

The first inhibition mechanism 41A has a lid member 40 and a support mechanism 42 that movably supports the lid member 40 . The lid member 40 and the support mechanism 42 are arranged in front of the elevator 23 .
The lid member 40 has a shielding portion 40a and a base portion 40b.
The shielding part 40 a is plate-shaped and formed in a size and shape that can cover the intake port 16 of the sampling tube 15 . The shielding portion 40a is arranged such that one surface (rear surface) faces the rear (intake port 16 side) and the other surface faces forward (the side opposite to the intake port 16). One surface (rear surface) of the shielding portion 40 a is parallel to the elevation direction A2 of the elevation mechanism 20 . One surface (rear surface) of the shielding portion 40 a can come into contact with or come close to the surface forming the intake port 16 of the sampling tube 15 . The intake 16 of the sampling tube 15 is closed by the shielding part 40 a coming into contact with or close to the surface forming the intake 16 (covering the intake 16 ). Hereinafter, for convenience of explanation, of the shielding portion 40a of the lid member 40, the area that abuts or approaches the surface forming the intake 16 (covers the intake 16) is referred to as the "intake shielding area".

The base portion 40b is formed integrally with the shield portion 40a. The base portion 40b is bent from the upper end portion of the shielding portion 40a and extends rearward (toward the elevator 23). The base portion 40b and the shielding portion 40a are formed by bending one plate material.
The support mechanism 42 has a support rod 43 , a fixing member 44 and biasing means 45 .
The support rod 43 is arranged in front of the lifting body 23 and the pipe 33 . The support rod 43 extends upward from the base portion 40b of the lid member 40. As shown in FIG. The direction in which the support rod 43 extends is parallel to the elevation direction A2. The fixing member 44 is fixed to the front outer surface of the pipe 33 and protrudes forward from the outer surface. A through hole is formed in the fixing member 44, and the support rod 43 is inserted through the through hole. The biasing means 45 is composed of a coil spring, and the support rod 43 passes through the inside of this coil spring. One end of the biasing means 45 abuts on the fixing member 44 , and the other end abuts on a collar portion 43 a provided at the bottom of the support rod 43 . As a result, the support rod 43 is urged downward by the urging means 45 . Therefore, the cover member 40 attached to the support rod 43 is also urged downward by the urging means 45 .

A holding member 46 is provided on the upper portion of the support rod 43 . The holding member 46 is a rod body penetrating the support rod 43 in the direction orthogonal to the support rod 43 . The support rod 43 can be lowered until the holding member 46 hits the upper surface of the fixed member 44 . The lowest position (depth) of the support rod 43 and the cover member 40 is determined by the position (height) at which the holding member 46 contacts the fixing member 44 .
The lid member 40 is lowered by the biasing force of the biasing means 45 . FIG. 8 shows a state in which the lid member 40 is at the lowest position (hereinafter referred to as "standby position P3"). The standby position P3 is above the picking position P1 and below the picking position P2. The biasing means 45 applies a biasing force to the lid member 40 to lower it to the standby position P3. When the lid member 40 is at the standby position P3, the intake shielding area of the shielding part 40a is positioned below the ground G1 and above the sampling position (lowered position) P1 of the sampling tube 15. As shown in FIG. Further, when the lid member 40 is at the standby position P3, the lower end portion of the lid member 40 is at a position (depth) that substantially coincides with the upper end portion of the intake port 16 of the sampling tube 15 .

The lifting body 23 has a contact plate 47 that contacts the lid member 40 when the lifting body 23 is lifted. The contact plate 47 is fixed to the front outer surface of the lifting body 23 and protrudes forward from the outer surface. The contact plate 47 is fixed to the lower portion of the lifting body 23 (near the lower end portion). The contact plate 47 is located below the base portion 40 b of the lid member 40 . The protruding length of the contact plate 47 from the outer surface of the lifting body 23 is shorter than the gap (front-rear distance) between the lifting body 23 and the shielding portion 40a, and the gap (front-rear distance) between the lifting body 23 and the base portion 40b. distance). As a result, the contact plate 47 contacts the base portion 40b when the elevating body 23 is lifted, but does not contact the shield portion 40a.

The action (operation) of the first inhibition mechanism 41A will be described below.
As shown in FIG. 8, when the sampling tube 15 is at the sampling position (lowered position) P1, the cover member 40 is lowered by the biasing force of the biasing means 45 and stands by at the standby position P3. In this state, the intake port 16 of the sampling tube 15 is not closed by the lid member 40. As shown in FIG. Therefore, as the tractor 2 travels, the soil is taken in through the inlet 16 of the sampling tube 15 and discharged through the outlet 17 by the movement of the sampling tube 15 .

Next, when the lifting mechanism 20 is driven at a desired sampling location to lift the sampling tube 15 together with the lifting body 23, the inlet 16 of the sampling tube 15 is covered and closed by the lid member 40 positioned at the standby position P3. (See Figure 9). This prevents the intake of soil from the intake port 16 . Therefore, it is possible to prevent soil at a position shallower than the sampling position P<b>1 (a position shallower than the desired depth) from being taken in from the intake port 16 of the sampling pipe 15 . At this time, the contact plate 47 of the lifting body 23 contacts the lower surface of the base portion 40 b of the lid member 40 .

From the state shown in FIG. 9 , when the lifting mechanism 20 is continuously driven to further lift the sampling tube 15 together with the lifting body 23 , the contact plate 47 rises to push up the lid member 40 . That is, the lid member 40 rises together with the sampling tube 15 when the sampling tube 15 ascends from the sampling position P1 toward the extraction position P2. As the cover member 40 rises together with the collection tube 15, the coil spring that constitutes the biasing means 45 is compressed. In other words, the lifting mechanism 20 lifts the lid member 40 together with the sampling tube 15 against the biasing force of the biasing means 45 . The inlet 16 of the sampling tube 15 is kept closed by the lid member 40 while both the sampling tube 15 and the lid member 40 are raised.

The upward movement of the sampling tube 15 and the lid member 40 is stopped when the female threaded portion 233 of the elevating body 23 hits the upper limit setting member 52 provided at the upper end of the pipe 33 (see FIG. 10). At this time, the collection tube 15 is at the removal position (up position) P2. That is, the upward movement of the sampling tube 15 and the lid member 40 stops when the sampling tube 15 reaches the extraction position P2.
The upper limit setting member 52 is composed of a male screw. This male thread is screwed into a female thread formed in an upper lid 48 fixed to the upper end of the pipe 33 and fixed with a lock nut. By rotating the male screw to change the amount of downward projection (in the direction toward the female screw portion 233) from the upper lid 48, the upper limit height of the female screw portion 233 is set and the height of the removal position P2 is adjusted. It is possible.

As described above, according to the first inhibition mechanism 41A, the lid member 40 opens the intake port 16 at the collection position P1, and the entire area between the collection position P1 and the removal position P2 (not including the collection position P1). The inlet 16 is closed for . As a result, it is possible to prevent soil from being collected at a depth other than the collection position P1. Moreover, it is possible to reliably prevent the soil from spilling out of the inlet 16 while the sampling pipe 15 is moving from the sampling position P1 to the extraction position P2.

11 and 12 show a second embodiment of the blocking mechanism 41. FIG. In the inhibition mechanism 41 (hereinafter referred to as “second inhibition mechanism 41 B”) of the second embodiment, the lid member 40 closes the outlet 17 of the collection tube 15 .
In the following description, the points in which the second inhibition mechanism 41B differs from the first inhibition mechanism 41A are mainly explained. Among the configurations of the second inhibition mechanism 41B, descriptions of the configurations common to the first inhibition mechanism 41A are omitted except for some. The configuration employed in the first inhibition mechanism 41A can also be employed in the second inhibition mechanism 41B as long as there is no inconvenience.

In the second inhibition mechanism 41B, the lid member 40 and the support mechanism 42 are arranged behind the lifting body 23. As shown in FIG.
The shielding portion 40 a of the lid member 40 is plate-shaped, and is formed in a size and shape capable of covering the discharge port 17 of the sampling tube 15 . The shielding portion 40a is arranged with one surface facing forward (the side of the discharge port 17) and the other surface facing the rear (the side opposite to the discharge port 17). One surface of the shielding portion 40 a is parallel to the elevation direction A<b>2 of the elevation mechanism 20 . One surface (front surface) of the shielding part 40 a can come into contact with or come close to the surface forming the discharge port 17 of the collection tube 15 . The outlet 17 of the sampling tube 15 is closed by the shielding part 40a abutting or approaching the surface forming the outlet 17 (covering the outlet 17). Hereinafter, for convenience of explanation, of the shielding portion 40a of the lid member 40, the area that abuts or is close to the surface forming the discharge port 17 (covers the discharge port 17) will be referred to as "discharge port shielding region". The base portion 40b is bent from the upper end portion of the shielding portion 40a and extends forward (toward the elevator 23).

The support rod 43 is arranged behind the lifting body 23 and the pipe 33 . The fixing member 44 is fixed to the rear outer surface of the pipe 33 and protrudes rearward from the outer surface.
The lid member 40 is lowered by the biasing force of the biasing means 45 . FIG. 11 shows a state in which the lid member 40 is at the standby position P3. When the cover member 40 is at the standby position P3, the outlet shielding area of the shielding part 40a is located below the ground G1 and above the sampling position (lowered position) P1 of the sampling tube 15. As shown in FIG. Further, when the lid member 40 is at the standby position P3, the lower end portion of the lid member 40 is at a position (depth) that substantially coincides with the upper end portion of the discharge port 17 of the sampling tube 15 .

The contact plate 47 of the lifting body 23 is fixed to the rear outer surface of the lifting body 23 and protrudes rearward from the outer surface. A guide member 49 is provided on the outer surface of the rear side of the lifting body 23 . The guide member 49 is a member that guides the lifting of the lid member 40 . The guide member 49 is an L-shaped plate that protrudes rearward from the outer surface of the elevating body 23 and is bent forward. abutting. Although not shown, a similar guide member 49 can also be provided in the first inhibition mechanism 41A.

The action (operation) of the second inhibition mechanism 41B will be described below.
As shown in FIG. 11, when the sampling tube 15 is at the sampling position (lowered position) P1, the lid member 40 is lowered by the biasing force of the biasing means 45 and stands by at the standby position P3. In this state, the discharge port 17 of the collection tube 15 is not closed by the lid member 40 . Therefore, as the tractor 2 travels, the soil is taken in through the inlet 16 of the sampling tube 15 and discharged through the outlet 17 by the movement of the sampling tube 15 .

Next, when the lifting mechanism 20 is driven at a desired sampling location to lift the sampling tube 15 together with the lifting body 23, the outlet 17 of the sampling tube 15 is covered and closed by the lid member 40 positioned at the standby position P3. (See phantom lines in FIG. 11). This prevents the intake of soil from the intake port 16 . Therefore, it is possible to prevent the soil at a position shallower than the sampling position P<b>1 (a position shallower than the desired depth) from being taken into the sampling pipe 15 . At this time, the contact plate 47 of the lifting body 23 contacts the lower surface of the base portion 40 b of the lid member 40 .

From the state indicated by the phantom line in FIG. 11 , when the lifting mechanism 20 is continuously driven and the collection tube 15 is lifted together with the lifting body 23 , the contact plate 47 is lifted to push up the cover member 40 . That is, the lid member 40 rises together with the sampling tube 15 when the sampling tube 15 ascends from the sampling position P1 toward the extraction position P2. The outlet 17 of the sampling tube 15 is kept closed by the lid member 40 while the sampling tube 15 and the lid member 40 are raised together.

The upward movement of the sampling tube 15 and the lid member 40 is stopped when the female threaded portion 233 of the elevating body 23 hits the upper limit setting member 52 provided at the upper end of the pipe 33 (see FIG. 12). At this time, the collection tube 15 is at the removal position (up position) P2.
As described above, according to the second inhibition mechanism 41B, the cover member 40 opens the discharge port 17 at the collection position P1, and the entire area between the collection position P1 and the removal position P2 (not including the collection position P1). The outlet 17 is closed throughout. As a result, it is possible to prevent soil from being collected at a depth other than the collection position P1. In addition, it is possible to reliably prevent soil from spilling out of the discharge port 17 while the sampling pipe 15 is moving from the sampling position P1 to the extraction position P2.

Moreover, although not shown, a configuration in which the first inhibition mechanism 41A and the second inhibition mechanism 41B are combined can be adopted. In this case, the lid member 40 and the support mechanism 42 are arranged both in front of and behind the elevator 23 . The cover member 40 blocks the intake of soil from the intake port 16 by closing the openings of both the intake port 16 and the discharge port 17 between the collection position P1 and the extraction position P2.

This configuration also prevents soil from being collected at a depth other than the collection position P1. Moreover, according to this configuration, it is possible to reliably prevent soil from spilling out of the intake port 16 and the discharge port 17 while the sampling pipe 15 is moving from the sampling position P1 to the extraction position P2.
13-15 illustrate yet another embodiment of the blocking mechanism 41. FIG.
In the embodiment shown in FIGS. 13 to 15, the inhibition mechanism 41 (hereinafter collectively referred to as “third inhibition mechanism 41C”) has a lid member 40 attached to the collection tube 15. As shown in FIG. The lid member 40 is opening/closing plates 40C1 and 40C2 that can open or close the opening 19 by swinging. The third inhibition mechanism 41C does not include the support mechanism 42 that movably supports the lid member 40. As shown in FIG.

The lid member 40 of the third inhibition mechanism 41C shown in FIG. 13 is an opening/closing plate 40C1. The opening/closing plate 40C1 can open or close the inlet 16 by swinging. The opening/closing plate 40C1 has an upper end attached to the upper part of the intake port 16, and can swing around the upper end as a fulcrum. The opening/closing plate 40C1 is biased by the biasing force of the biasing member 50 in the direction of opening the inlet 16 (see arrow A5). The biasing member 50 is a torsion coil spring having one end in contact with the upper portion of the inlet 16 and the other end in contact with the upper portion of the opening/closing plate 40C1.

According to the third inhibition mechanism 41C shown in FIG. 13, when the sampling tube 15 is in the sampling position (lowered position), the opening/closing plate 40C1 is swung upward by the biasing force of the biasing member 50, and the inlet 16 is closed. Open (see phantom line). Therefore, soil can be taken into the sampling pipe 15 from the intake port 16 . Then, when the sampling tube 15 is lifted from the sampling position by the lifting mechanism 20 at a desired soil sampling location, the opening/closing plate 40C1 receives the resistance of the soil and swings against the biasing force of the biasing member 50, thereby opening the intake port. 16 (see arrow A6). As a result, it is possible to prevent the soil from being collected at a depth other than the collection position.

In the example shown in FIG. 13, the lower portion of the intake port 16 of the sampling tube 15 is blocked by the blocking plate 51, and the opening/closing plate 40C1 is designed to close only the portion of the intake port 16 above the blocking plate 51. However, the opening/closing plate 40C1 may be configured to close the entire intake port 16 without providing the closing plate 51. FIG.
The lid member 40 of the third inhibition mechanism 41C shown in FIG. 14 is an opening/closing plate 40C2. The opening/closing plate 40C2 can open or close the discharge port 17 by swinging. The opening/closing plate 40C2 has an upper end attached to the upper part of the discharge port 17, and can swing around the upper end as a fulcrum. The opening/closing plate 40C2 is biased by the biasing force of the biasing member 50 in the direction of opening the discharge port 17 (see arrow A7). The biasing member 50 is a torsion coil spring having one end in contact with the upper portion of the discharge port 17 and the other end in contact with the upper portion of the opening/closing plate 40C2.

According to the third inhibition mechanism 41C shown in FIG. 14, when the sampling tube 15 is in the sampling position (lowered position), the opening/closing plate 40C2 is swung upward by the biasing force of the biasing member 50, and the discharge port 17 is closed. Open (see phantom line). Therefore, the soil can be taken into the sampling pipe 15 from the inlet 16 and discharged from the outlet 17 . Then, when the sampling tube 15 is lifted from the sampling position by the lifting mechanism 20 at a desired soil sampling location, the opening/closing plate 40C2 receives the resistance of the soil and swings against the biasing force of the biasing member 50, thereby opening the discharge port. 17 (see arrow A8). As a result, it is possible to prevent the soil from being collected at a depth other than the collection position.

The third inhibition mechanism 41C shown in FIG. 15 is configured such that the lid member 40 comprises an opening/closing plate 40C1 capable of opening or closing the inlet 16 by swinging and an opening/closing plate 40C2 capable of opening or closing the discharge port 17 by swinging. It is configured. That is, the third inhibition mechanism 41C shown in FIG. 15 has a configuration in which the third inhibition mechanism 41C shown in FIG. 13 and the third inhibition mechanism 41C shown in FIG. 14 are combined.

According to the third inhibition mechanism 41C shown in FIG. 15, when the sampling tube 15 is in the sampling position (lowered position), the opening/closing plates 40C1 and 40C2 are swung upward by the biasing force of the biasing member 50, thereby opening the intake port. 16 and outlet 17 are open (see phantom lines). Therefore, the soil can be taken into the sampling pipe 15 from the inlet 16 and discharged from the outlet 17 . Then, when the sampling tube 15 is lifted from the sampling position by the lifting mechanism 20 at a desired soil sampling location, the opening/closing plates 40C1 and 40C2 receive the resistance of the soil and swing against the biasing force of the biasing member 50. Inlet 16 and outlet 17 are closed (see arrows A9 and A10). As a result, it is possible to prevent the soil from being collected at a depth other than the collection position.

In the examples shown in FIGS. 13 to 15, the axial direction of the sampling tube 15 is inclined with respect to the horizontal direction, and the front end is positioned lower than the rear end. The above-described third inhibition mechanism 41C may be applied to the collection tube 15 whose center direction is horizontal.
Further, as still another embodiment (not shown) of the blocking mechanism, the lid member 40 may be configured to be able to close the opening 19 at the sampling position P1 when soil sampling is completed. In this case, the lid member 40 of the first inhibition mechanism 41A or the lid member 40 of the second inhibition mechanism 41B can be moved up and down in the vertical direction by an arbitrary elevating mechanism such as an air cylinder. 40 is lowered to the sampling position P1 to close the opening 19 (intake port 16 and/or discharge port 17), and with the opening 19 closed, the lid member 40 is raised to the extraction position together with the sampling tube 15. be able to.

This configuration also prevents soil from being collected at a depth other than the collection position. In addition, it is possible to reliably prevent soil from spilling from the opening 19 while the sampling tube 15 is moving from the sampling position to the extraction position.
<Extruder>
As shown in FIGS. 16 to 19, the soil sampling device 1 includes a pusher 60 for pushing out the soil sampled in the sampling tube 15. As shown in FIGS. The push-out tool 60 pushes out the soil sampled in the sampling tube 15 at the aforementioned take-out position P2.

The pusher 60 pushes out the soil from the extraction port 18 of the collection tube 15 . More specifically, the pusher 60 is a rod-shaped member that moves from one of the pair of outlets 18a and 18b (the outlet 18a) toward the other (the outlet 18b) to push out the soil.
The soil sampling device 1 has a moving mechanism 61 that moves the pusher 60 . As shown in FIG. 18 , the moving mechanism 61 moves the pushing tool 60 to a first position (position indicated by solid lines) for pushing out the soil from the outlet 18 and a second position (position indicated by phantom lines) for disengaging from the outlet 18 . ) and .

As shown in FIGS. 17 to 19, the moving mechanism 61 has a guide cylinder 62, an urging member 63, and a switching portion 64. As shown in FIGS.
The guide cylinder 62 is a cylinder with one end and the other end open. One end of the guide cylinder 62 is connected to the outer surface of the pipe 33 of the lifting mechanism 20 . As shown in FIGS. 18 and 19, the pipe 33 has through holes 33a and 33b formed at a portion to which the guide tube 62 is connected and at a position facing the portion, respectively. A cylindrical body 65 forming part of the switching portion 64 is connected to the other end of the guide tube 62 . The central axis direction of the guide tube 62 is perpendicular to the central axis direction of the pipe 33 . The guide tube 62 accommodates the pushing tool 60 . The pusher 60 is movable along the guide tube 62 . The pusher 60 protrudes from one end of the guide tube 62 when it is in the first position (solid line position in FIG. 18), and protrudes from the other end of the guide tube 62 when it is in the second position (phantom line position in FIG. 18). do. Further, when the pushing tool 60 is at the first position, it penetrates through the through holes 33a and 33b of the pipe 33, and the tip of the pushing tool 60 penetrates into a container 90 which will be described later.

The biasing member 63 is housed inside the guide cylinder 62 . The biasing member 63 biases the pusher 60 in the direction of moving to the first position (see arrow A11 in FIG. 18). The biasing member 63 is composed of a coil spring. The base end side of the pusher 60 (the other end side of the guide tube 62 ) is inserted through a coil spring forming a biasing member 63 .
The switching portion 64 alternately switches between a holding state in which the pusher 60 is held at the second position against the biasing force of the biasing member 63 and a release state in which the holding is released. When the switching portion 64 is in the holding state, the pusher 60 is held at the second position. When the switching portion 64 is in the released state, the pusher 60 is moved to the first position by the biasing force of the biasing member 63 .

As shown in FIGS. 18 to 23, the switching portion 64 has a drive source 66, a cylindrical body 65, a power transmission mechanism 67, and a cam plate 68. As shown in FIGS.
The drive source 66 is a motor. As shown in FIG. 19, the drive source 66 is supported by a support member 69. As shown in FIG. The support member 69 is attached to a projecting plate 70 projecting from the outer surface of the pipe 33 . As shown in FIGS. 18 and 19, the cylindrical body 65 is rotatably attached to the other end of the guide tube 62 via a support shaft 71. As shown in FIGS. The cylindrical body 65 is a bearing having an inner ring attached to the support shaft 71 and an outer ring rotating around the support shaft 71 . As shown in FIG. 18 , the support shaft 71 protrudes from a tube portion 72 provided at the other end of the guide tube 62 . The support shaft 71 protrudes in a direction orthogonal to the central axis of the guide tube 62 (in a direction parallel to the central axis direction of the pipe 33).

The power transmission mechanism 67 transmits the rotational power of the drive source (motor) 66 to the cam plate 68 to rotate the cam plate 68 . As shown in FIGS. 18 to 20, etc., the power transmission mechanism 67 has a small gear 73, a medium gear 74, and a large gear 75. As shown in FIGS. The small gear 73 is attached to the output shaft of the drive source (motor) 66 . The middle gear 74 is a gear having more teeth than the small gear 73 and meshes with the small gear 73 . The middle gear 74 is rotatably supported by a first support shaft 77 projecting from a first bracket 76 via a first bearing 78 . The first bracket 76 is attached to the support member 69 . The large gear 75 has more teeth than the medium gear 74 and meshes with the medium gear 74 . The large gear 75 is rotatably supported by a second support shaft 80 projecting from a second bracket 79 via a second bearing 81 . A second bracket 79 is attached to the support member 69 .

As shown in FIG. 20, when the drive source 66 is driven, the small gear 73 rotates along with the output shaft in the direction of arrow A12. Along with the rotation, the large gear 75 rotates in the arrow A14 direction.
A cam plate 68 is attached to the large gear 75 . Therefore, by driving the drive source 66, the cam plate 68 rotates together with the large gear 75 in the arrow A14 direction.

As shown in FIGS. 18, 20, etc., the cam plate 68 has a mounting plate 68a and a receiving plate 68b. The mounting plate 68a is mounted on one surface of the large gear 75 (the surface on the cylindrical body 65 side). The mounting plate 68a has an arcuate portion 68a1 and an overhanging portion 68a2. The arc-shaped portion 68 a 1 is an arc-shaped portion extending along the circumferential direction of the large gear 75 . The length of the arc-shaped portion 68a1 is longer than 1/3 and shorter than 1/2 of the total circumferential length of the large gear 75. As shown in FIG. The protruding portion 68a2 protrudes outward (in the direction away from the center of the large gear 75) from the arc-shaped portion 68a1. The projecting portion 68 a 2 projects outward from the outer edge of the large gear 75 .

The receiving plate 68b is attached to the mounting plate 68a. The receiving plate 68b is attached perpendicularly to the cylindrical body 65 side surface of the mounting plate 68a, and stands up from the cylindrical body 65 side surface toward the cylindrical body 65 side. As shown in FIG. 20, the receiving plate 68b has a first portion 68b1 and a second portion 68b2. The first portion 68b1 extends along the arcuate portion 68a1. The second portion 68b2 extends along the projecting portion 68a2. The first portion 68b1 and the second portion 68b2 are continuous. The first portion 68b1 is formed in an arc shape along the outer circumference of the large gear 75, and the distance from the center of the large gear 75 is constant. The second portion 68b2 is formed in an arc shape that separates from the outer periphery of the large gear 75 (the distance from the center of the large gear 75 increases) as it separates from the first portion 68b1.

The cam plate 68 includes a first cam plate 68A and a second cam plate 68B. The first cam plate 68</b>A and the second cam plate 68</b>B have the same shape and are arranged at positions that are point-symmetrical with respect to the center of the large gear 75 . In other words, the first cam plate 68A and the second cam plate 68B are arranged 180° apart in the circumferential direction of the large gear 75 . 19 to 23, only the receiving plate 68b of the second cam plate 68B is shown with the mounting plate 68a omitted. 19 to 23, the outermost locus of movement of the cam plate 68 is indicated by an imaginary circle E1.

Here, the action (operation) of the switching unit 64 will be described with reference to FIGS. 20 to 23. FIG.
FIG. 20 shows the pusher 60 moved to the first position by the biasing force of the biasing member 63 . In this state, when the cam plate 68 rotates in the arrow A14 direction, the second portion 68b2 of the receiving plate 68b of the cam plate 68 contacts the outer peripheral surface of the cylindrical body 65. As shown in FIG.

When the cam plate 68 further rotates in the direction of arrow A14 together with the large gear 75 from the state shown in FIG. Therefore, the cylindrical body 65 moves in the direction of arrow A15 as shown in FIG. to move in the direction of arrow A15.

When the cam plate 68 further rotates in the direction of arrow A14 from the state shown in FIG. It moves further in the direction of arrow A15 against the force. Then, when the cylindrical body 65 reaches the boundary between the first portion 68b1 and the second portion 68b2, the pusher 60 is in the second position and is separated from the extraction port 18 of the sampling tube 15 (see FIG. 22).

When the cam plate 68 further rotates in the arrow A14 direction from the state shown in FIG. 22, the cylindrical body 65 moves relative to the first portion 68b1 of the receiving plate 68b. At this time, since the first portion 68b1 is at a constant distance from the center of the large gear 75, the actual position of the cylindrical body 65 is changed only by changing the position of the cylindrical body 65 relative to the first portion 68b1. do not do. Therefore, the pusher 60 is held at the second position. Then, when the cam plate 68 rotates further and the cylindrical body 65 passes over the end of the first portion 68b1, the cam plate 68 is in a released state, and the pusher 60 is moved by the biasing force of the biasing member 63. Move in the direction of arrow A11 (see FIG. 23). The pushing tool 60 in the released state moves to the first position, penetrates the extraction port 18 of the sampling tube 15, and pushes out the soil from the extraction port 18. - 特許庁

After the first cam plate 68A operates as described above, the second cam plate 68B also operates in the same manner. That is, the second cam plate 68B moves the second pusher 60 from the first position to the second position and holds it at the second position, and then releases the hold and moves it to the first position, thereby moving the collection tube. Soil is extruded from the outlet 18 of 15. After that, the first cam plate 68A and the second cam plate 68B alternately repeat the above operation. As a result, the pushing tool 60 repeats reciprocating movement between the first position and the second position, and the pushing out of the soil from the extraction port 18 of the sampling tube 15 by the pushing tool 60 is performed intermittently at a constant cycle.
<Container>
As shown in FIGS. 16 to 18, the soil sampling device 1 has a container 90 that receives the soil pushed out by the pusher 60. As shown in FIG. As shown in FIG. 24, the container 90 has a plurality of storage portions 91. As shown in FIG. As shown in FIGS. 18 and 24, the container 90 is formed in a flat cylindrical shape. The center of the container 90 is rotatably supported by a central shaft 92 projecting from the outer surface of the pipe 33 (the outer surface opposite to the side to which the guide tube 62 is connected) via a bearing 93 . The central axis 92 extends in parallel with the movement direction of the pusher 60 (same as the central axis direction of the guide tube 62).

The container 90 has a bottom body 94 and a lid body 95 .
The bottom body 94 has a disk-shaped bottom plate 94a, and an inner peripheral wall 94b and an outer peripheral wall 94c rising from one surface of the bottom plate 94a. The other surface of the bottom plate 94a is in contact with the outer surface of the pipe 33 (the outer surface opposite to the side to which the guide tube 62 is connected). A plurality of through holes 94e are formed in the bottom plate 94a. The plurality of through holes 94e are arranged at regular intervals in the circumferential direction around the central axis 92 . The inner peripheral wall 94b is formed in a cylindrical shape. The inner peripheral wall 94 b is fitted to the outer peripheral surface of the bearing 93 . Thereby, the bottom body 94 can rotate around the central axis 92 together with the outer ring of the bearing 93 . The outer peripheral wall 94c is formed in a cylindrical shape with a larger diameter than the inner peripheral wall 94b.

A screw shaft 94d is fixed to the inner peripheral wall 94b. The threaded shaft 94 d extends parallel to the central axis 92 . Two screw shafts 94d are arranged at symmetrical positions with the central axis 92 interposed therebetween.
The lid body 95 has a lid plate 96 and a plurality of housing portions 91 . The cover plate 96 is disc-shaped and arranged parallel to the bottom plate 94a. FIG. 24 shows an example in which the cover plate 96 is made of a transparent plate (for example, an acrylic plate or the like) so that the inside of the container 90 can be visually recognized, but the cover plate 96 may be opaque. As shown in FIG. 18, the cover plate 96 is formed with two through holes 96a and 96b. A screw shaft 94d passes through each of the two through holes 96a and 96b. The screw shaft 94 d protrudes from the cover plate 96 .

A nut (wing nut) 97 is screwed onto the screw shaft 94d. The lid body 95 is fixed to the bottom body 94 by screwing a nut 97 onto the screw shaft 94d. Further, the cover 95 can be removed from the bottom 94 by unscrewing the nut 97 . That is, the lid body 95 can be attached to and detached from the bottom body 94 .
The plurality of housing portions 91 are arranged in an annular shape in a circumferential direction around the central axis 92 . In the case of this embodiment, the number of accommodating portions 91 is twelve, but the number of accommodating portions 91 is not particularly limited. The plurality of housing portions 91 are partitioned by partition walls 98 . The housing portion 91 has an inner wall 91a, an outer wall 91b, and a bottom wall 91c. The inner wall 91a is arranged on the inner peripheral wall 94b side of the bottom body 94 . The outer wall 91b is arranged on the outer peripheral wall 94c side of the bottom body 94 . The inner wall 91a and the outer wall 91b are fixed to the cover plate 96. As shown in FIG. The bottom wall 91 c abuts on the bottom plate 94 a of the bottom body 94 . A plurality of through holes 91d are formed in the bottom wall 91c. The plurality of through holes 91d are arranged at regular intervals in the circumferential direction around the central axis 92 . The position of the through hole 91d of the bottom wall 91c corresponds (overlaps) with the position of the through hole 94e of the bottom plate 94a. The storage part 91 stores soil in a space surrounded by a partition wall 98 , an inner wall 91 a , an outer wall 91 b , a bottom wall 91 c and a cover plate 96 .

The through hole 91d of the bottom wall 91c and the through hole 94e of the bottom plate 94a are a receiving port 99 for receiving soil in the container 90. As shown in FIG. Therefore, the plurality of housing portions 91 each have a receiving port 99 . As shown in FIG. 18, the pushing tool 60 is inserted through the extraction port 18 of the sampling tube 15 and into the receiving port 99 (through hole 91d, through hole 94e). As a result, the soil can be guided to the receiving port 99 , and the soil sampled by the sampling tube 15 is stored in the storage portion 91 .

The container 90 is rotatable around the central axis 92 together with the outer ring of the bearing 93 . Container 90 is rotatable in the direction indicated by arrow A16 in FIG. By rotating the container 90 around the central axis 92, the plurality of receiving openings 99 (the through hole 91d of the housing portion 91 and the through hole 94e of the bottom plate 94a) are sequentially moved to the insertion position P4 where the pusher 60 can be inserted. . In the case of this embodiment, the insertion position P4 is a position corresponding to one accommodation portion (accommodation portion 91A in the case of FIGS. 16 and 24) located in the lower portion of the container 90, and is the axial direction of the central axis 92. It overlaps with the lifting body 23 when viewed from above.
<Interlocking mechanism>
As shown in FIGS. 16 to 19, the soil sampling apparatus 1 includes an interlocking mechanism 100 that moves the receiving port 99 to the insertion position P4 in conjunction with the elevation of the sampling tube 15 from the sampling position P1 to the extraction position P2. there is The interlocking mechanism 100 moves the receiving port 99 to the insertion position P4 by rotating the container 90 around the central axis 92 in conjunction with the elevation of the sampling tube 15 from the sampling position P1 to the extraction position P2.

As shown in FIG. 16 and the like, the interlocking mechanism 100 has a push-up member 101 and a receiving member 102 .
As shown in FIGS. 16 and 25, the push-up member 101 is attached to the lower portion of the pipe 33. As shown in FIG. As shown in FIG. 25, the push-up member 101 has a first portion 101a, a second portion 101b, and a third portion 101c. The first portion 101a extends linearly along the elevation direction of the elevation body 23 (arrow A2 direction). The second portion 101b is bent and extends downward from the upper end portion of the first portion 101a. The third portion 101c bends from the lower end portion of the second portion 101b and extends in the horizontal direction (perpendicular to the paper surface of FIG. 25). A flange portion 101d is provided at the upper end portion of the first portion 101a.

A first portion 101 a of the push-up member 101 is inserted through the support tube 103 . The support tube 103 is fixed to the lower portion of the outer surface of the pipe 33 . The push-up member 101 is supported by the support tube 103 by inserting the first portion 101a into the support tube 103. As shown in FIG. The first portion 101a slides along the support tube 103, so that the push-up member 101 can move up and down along the elevation direction of the elevation body 23 (arrow A2 direction). The lowermost position of the push-up member 101 is defined by the flange portion 101 d coming into contact with the upper surface of the support cylinder 103 .

The hole of the support tube 103 has a non-circular cross section (for example, an oval shape). The first portion 101 a of the push-up member 101 has a non-circular cross-section corresponding to the shape of the hole of the support tube 103 at least at the portion that slides along the support tube 103 . This prevents the push-up member 101 from rotating about the axis of the support cylinder 103 and changing the orientation of the third portion 101c.
As shown in FIGS. 18 and 24, the receiving member 102 is attached to the container 90 . Specifically, the receiving member 102 is attached to the outer peripheral wall 94 c of the bottom body 94 . A plurality of receiving members 102 are provided along the outer circumference of the container 90 . The plurality of receiving members 102 are arranged along the outer periphery of the container 90 at regular intervals in the circumferential direction around the central axis 92 . The number of receiving members 102 is the same as the number of accommodating portions 91 . Each receiving member 102 is arranged at a position corresponding to each housing portion 91 . The receiving member 102 has a base portion 104 , a support shaft 105 , a rotating body 106 and an urging spring 107 . The base 104 is fixed to the outer peripheral wall 94c. The support shaft 105 is provided through the base portion 104 . The support shaft 105 extends parallel to the central axis 92 . The rotating body 106 is rotatable about the support shaft 105 in one direction and the other direction with respect to the base portion 104 . The biasing spring 107 is a torsion coil spring, and has one end in contact with the outer peripheral wall 94c of the discharge port 17 and the other end in contact with the rotating body 106 . The biasing spring 107 biases the rotating body 106 to rotate in one direction around the support shaft 105 . One direction around the support shaft 105 is the same direction as the rotation direction of the container 90 (the direction indicated by the arrow A16).

As shown in FIGS. 18, 24, and 25, the soil sampling device 1 includes a regulation mechanism 110 that regulates rotation of the container 90. As shown in FIGS. The regulation mechanism 110 prevents the container 90 from rotating unintentionally due to vibration or the like. Also, the regulation mechanism 110 defines a reference position for rotation of the container 90 . Although the figure shows a configuration in which one regulation mechanism 110 regulates the rotation of the container 90 at one position, a plurality of (for example, two) regulation mechanisms 110 are provided to regulate the rotation of the container 90 at a plurality of positions. may be configured.

The regulation mechanism 110 has a ball 111 and a coil spring 112 . A portion of the ball 111 is fitted in a recessed portion 94f formed in the bottom plate 94a of the container 90 when the container 90 is at the reference position. Ball 111 is attached to the tip of coil spring 112 . The ball 111 is pressed against the bottom plate 94 a by the biasing force of the coil spring 112 . A proximal end portion of the coil spring 112 abuts the shaft portion of the bolt 113 . A shaft portion of the bolt 113 extends in a direction perpendicular to the bottom plate 94a (a direction parallel to the central axis 92). The bolt 113 is screwed into the cylindrical body 114 . The tubular body 114 is fixed to a projecting plate 115 projecting from the outer surface of the pipe 33 . The regulating mechanism 110 prevents the container 90 from unintentionally rotating due to the ball 111 being pressed against the bottom plate 94 a by the biasing force of the coil spring 112 .

The regulation by the regulation mechanism 110 is released when a rotational force acts on the container 90 by the operation of the interlocking mechanism 100 described below. Specifically, when a rotational force is applied to the container 90 by the operation of the interlocking mechanism 100, the coil spring 112 is shortened, the ball 111 is separated from the recessed portion 94f, and the bottom plate 94a slides relative to the ball 111. , the container 90 can be rotated.

Here, the action (operation) of the interlocking mechanism 100 will be described.
FIG. 26 shows a state in which the container 90 is at the rotational reference position and the sampling tube 15 is at the sampling position P1. At this time, the push-up member 101 is at the lowest position and separated from the receiving member 102 . Further, the receiving port 99 of one accommodating portion 91A of the plurality of accommodating portions 91 is located at the insertion position P4 where the pushing tool 60 can be inserted.

When the sampling tube 15 that has sampled the soil rises from the state shown in FIG. 26, the sampling tube 15 hits the lower end of the first portion 101a of the push-up member 101 and pushes up the push-up member 101 as shown in FIG. 27 (see arrow A17). ).
When the sampling tube 15 that has sampled the soil is further raised from the state shown in FIG. 27, the pushing-up member 101 is further pushed up. As a result, the third portion 101c of the push-up member 101 comes into contact with the rotating body 106 of the receiving member 102 (see the third portion 101c indicated by phantom lines in FIG. 28). After that, the extraction tube 15 is further raised to the take-out position P2 and the push-up member 101 is pushed up, so that the third portion 101c of the push-up member 101 moves from the virtual line position to the solid line position. As a result, the receiving member 102 is pushed up, so that the container 90 rotates around the central axis 92 (see arrow A16). The rotation angle of the container 90 at this time is a rotation angle corresponding to one accommodation portion 91 . For example, when there are 12 accommodating portions 91, the rotation angle is 360°/12=30°. In order to accurately define the rotation angle of the container 90 at this time, it is preferable to provide a mechanism that enables rotation by a constant rotation angle (for example, by 30 degrees). This mechanism may be a ratchet mechanism, or may be a mechanism using the coil spring 112, the ball 111, and the recess 94f similar to the regulation mechanism 110 described above. Due to this rotation of the container 90, the receiving port 99 of the accommodating portion 91B adjacent to the accommodating portion 91A moves to the insertion position P4 where the pushing tool 60 can be inserted.

In the state shown in FIG. 28, the pushing tool 60 pushes out the soil collected in the sampling tube 15, so that the tip of the pushing tool 60 enters the container 90 (see the solid line position of the pushing tool 60 shown in FIG. 18). ), and the soil is stored in the storage portion 91 ( 91 B) of the container 90 .
After that, the pushing tool 60 retreats and separates from the container 90 and the sampling tube 15 , and then the elevating body 23 descends together with the sampling tube 15 . While the lifting body 23 descends, the push-up member 101 hits (interferes with) the rotating body 106 of the receiving member 102 below, but the rotating body 106 rotates downward against the biasing force of the biasing spring 107. Therefore, the receiving member 102 does not hinder the descent of the elevating body 23 . After rotating downward, the rotating body 106 rotates upward by the biasing force of the biasing spring 107 and returns to its original position (orientation).

By reciprocating the sampling tube 15 between the sampling position P1 and the taking-out position P2, the above-described rotation of the container 90 and pushing out of the soil from the sampling tube 15 into the container 90 by the pushing tool 60 are repeated. As a result, soil can be sequentially stored in the plurality of storage portions 91 while rotating the container 90 . By removing the lid 95 from the bottom 94 after the soil is completely stored in all the storage portions 91 , the storage portions 91 can be removed together with the lid 95 .

As shown in FIGS. 16, 27, etc., the soil sampling device 1 has an adjustment bolt 116 for adjusting the position of the extraction port 18 with respect to the reception port 99. As shown in FIG. The adjusting bolt 116 is screwed onto a nut 117 fixed to the outer surface of the pipe 33 . The shaft portion of the adjustment bolt 116 passes through the wall of the pipe 33 and contacts the outer surface of the lifting body 23 inside the pipe 33 . By rotating the adjusting bolt 116 , the lifting body 23 is pushed by the shaft portion of the adjusting bolt 116 , and the lifting body 23 tilts inside the pipe 33 . This allows fine adjustment of the position of the extraction port 18 when the extraction tube 15 is moved to the extraction position P2. As a result, when the collection tube 15 moves to the extraction position P2, it can be ensured that it overlaps with the extraction port 18 .

A moving mechanism 61 for moving the pusher 60 moves the pusher 60 so that the pusher 60 moves to the first position (the position indicated by the solid line in FIG. 18) when the collection tube 15 is at the extraction position P2. The timing (period, speed, etc.) is adjusted.
<Another Embodiment of Pusher Moving Mechanism>
29 to 33 show another embodiment of the moving mechanism 61 of the pusher 60 (hereinafter referred to as second embodiment). The moving mechanism 61 of the pusher 60 of the above-described embodiment (hereinafter referred to as the first embodiment) has a drive source (motor) 66, but the moving mechanism 61 of the second embodiment (hereinafter referred to as the " The second moving mechanism 61B'') does not have a drive source 66. As shown in FIG. The second moving mechanism 61B is a mechanism for manually moving the pusher 60. As shown in FIG.

In all of the soil sampling devices 1 described above (for example, the soil sampling device 1 shown in FIGS. 16 to 28, the soil sampling device 1 shown in FIGS. 8 to 12, etc.), the moving mechanism 61 of the first embodiment has A second moving mechanism 61B can be employed instead. In this case, the configuration of the soil sampling device 1 other than the moving mechanism 61 can be the same as that of the soil sampling device 1 described above, except for the points described below. 29 to 33 show only part of the configuration of the soil sampling device 1. FIG. FIG. 29 shows a working vehicle provided with the soil sampling device 1 including the second moving mechanism 61B, but the configuration other than the moving mechanism 61B is omitted. For convenience of illustration, FIGS. 30 and 32 show cross-sectional views of the container 90 and the like as viewed from above.

In the following description, the differences of the second moving mechanism 61B from the moving mechanism 61 of the first embodiment will be mainly described. About the structure which is common to the moving mechanism 61 of 1st Embodiment among the structure of the 2nd moving mechanism 61B, description is abbreviate|omitted except for one part. The configuration employed in the moving mechanism 61 of the first embodiment can also be employed in the second moving mechanism 61B as long as there is no inconvenience.

As shown in FIGS. 29 to 31 and the like, the second moving mechanism 61B includes a swingable operating lever 120, and swinging of the operating lever 120 to reciprocate the pusher 60 between the first position and the second position. and a conversion mechanism 121 for conversion. As described above, the first position is the position where the soil is pushed out from the extraction port 18 of the sampling tube 15, and the second position is the position where the extraction port 18 is separated. In FIG. 31, the pusher 60 at the first position is indicated by phantom lines, and the pusher 60 at the second position is indicated by solid lines.

The position of the collection tube 15 is set at a predetermined position by the setting unit 122 . The predetermined position is the take-out position P2 described above. In the example shown in FIG. 31, the setting unit 122 is composed of the lifting mechanism 20 configured as described above. The lifting mechanism 20 moves the sampling tube 15 between a sampling position P1 for sampling soil and a predetermined position (retrieving position P2). That is, the elevating mechanism 20 can set the position of the collection tube 15 at the predetermined position (extraction position P2) by elevating the elevating body 23 . The pusher 60 pushes out the soil in the sampling tube 15 set at the predetermined position (extraction position P2) by the setting unit 122 to the outside of the sampling tube 15 .

The elevating mechanism 20 constituting the setting portion 122 of the second moving mechanism 61B may be the first elevating mechanism 20A or the second elevating mechanism 20B. Further, the elevation direction (angle with respect to the ground) of the elevation body 23 by the elevation mechanism 20 may be the same as that of the elevation mechanism 20 described above, or may be changed.
As shown in FIG. 29 , the operating lever 120 is attached to the rotary tiller 4 via an attachment bracket 123 . The mounting bracket 123 is fixed to the top mast 8 of the rotary tiller 4 with bolts or the like. As shown in FIG. 30, the mounting bracket 123 has a first plate portion 123a and a second plate portion 123b. The second plate portion 123b extends horizontally from the upper portion of the first plate portion 123a. An upright portion 123c is formed at the rear end of the second plate portion 123b. A slot 123d extending in the front-rear direction is formed in the second plate portion 123b. A base end portion of the operating lever 120 is rotatably supported by a horizontal shaft 124 attached to the first plate portion 123a. The horizontal axis 124 extends in the width direction of the device. The operating lever 120 extends through the slot 123d. A grip portion 125 is provided at the upper end of the operating lever 120 to be gripped by the operator during operation. The operating lever 120 can swing back and forth along the slot 123d with the horizontal shaft 124 as a fulcrum.

A locking piece 126 is provided on the front portion of the mounting bracket 123 so as to protrude downward. One end of a tension spring 127 is locked to the locking piece 126 . The other end of the tension spring 127 is engaged with a through hole 120a formed in the operating lever 120. As shown in FIG. A tension spring 127 pulls the operating lever 120 in the direction of swinging backward. FIG. 30 shows a state in which the operating lever 120 is pulled by the tension spring 127 and swings backward.

A mounting portion 129 to which one end side of a cable 128 is mounted is provided at a position above the through hole 120a of the operating lever 120. As shown in FIG. The cable 128 extends rearward through a first guide tube 130 attached to the upright portion 123c of the attachment bracket 123 .
A support 131 is fixed to the outer surface of the guide cylinder 62 through which the pusher 60 is inserted. A second guide tube 132 is attached to the support 131 . The cable 128 passing through the first guide tube 130 passes through the second guide tube 132 and extends further rearward.

A pressing body 133 is in contact with the proximal end portion of the pushing tool 60 . The pressing body 133 is fixed to one end of an arm member 134 bent in an L shape. A shaft 135 protrudes from the bent portion of the arm member 134 . The shaft 135 is inserted into a boss 137 fixed to one end of the stay 136 . The other end of the stay 136 is fixed to the outer surface of the guide cylinder 62 . As the shaft 135 rotates about its axis within the boss 137 , the arm member 134 rotates about its axis. The other end of the cable 128 is locked to the other end of the arm member 134 .

The cable 128, the arm member 134, and the pressing member 133 described above constitute a conversion mechanism 121 that converts the swinging motion of the operating lever 120 into reciprocating movement of the pusher 60 between the first position and the second position.
The action (operation) of the second moving mechanism 61B will be described below.
FIG. 30 shows a state in which the operating lever 120 is not operated. In this state, the operating lever 120 is pulled by the tension spring 127 and is in the rearward position. Also, the pushing tool 60 is at the second position away from the outlet 18 .

From the state shown in FIG. 30, when the operating lever 120 is swung forward against the tensile force of the tension spring 127, the cable 128 moves forward and the other end of the arm member 134 moves forward. It rotates around the axis of the shaft 135 (see arrow A18 in FIG. 30). As a result, the pressing body 133 presses the proximal end portion of the pusher 60, and the pusher 60 moves to the first position to push out the soil from the extraction port 18 of the sampling tube 15 into the container 90 (phantom line in FIG. 31). , see FIG. 32). In other words, the pushing tool 60 stores the soil in the container 90 by penetrating the pair of outlets 18 a and 18 b of the sampling tube 15 and entering the container 90 .

According to the second moving mechanism 61B, by manually operating the operation lever, the soil can be pushed out from the extraction port 18 of the sampling tube 15 into the container 90 with a strong force. Therefore, even if the soil collected in the collection tube 15 hardens and cannot be easily pushed out, the soil can be reliably pushed out from the collection tube 15 .
FIG. 33 shows a state in which the rotary tiller 4 is raised with respect to the vehicle body 6 of the tractor 2. As shown in FIG. The operating lever 120 is arranged at a position where it can be operated from the driver's seat 3 when the rotary tiller 4 is raised with respect to the vehicle body 6 of the tractor 2 . In other words, the operating lever 120 is arranged at a position where the hand HD of the driver sitting on the driver's seat 3 can reach the grip portion 125 of the operating lever 120 . As a result, the driver can operate the operation lever 120 without getting off the driver's seat 3, which improves workability. However, the operation lever 120 may be configured so that it can be operated without raising the rotary tiller 4 with respect to the vehicle body 6 by increasing the length of the operation lever 120 and extending it forward.

When the above-described second moving mechanism 61B is used, the sampling tube 15 containing the soil may be manually held at the extraction position (without using the lifting mechanism 20). In this case, the setting unit 122 is configured as a holder capable of holding the sampling tube 15 at a position where the soil can be taken out by the pushing tool 60 and moved to the container 90, and the holding fixture manually holds the sampling tube 15. After that, the operating lever 120 is operated to take out the soil from the sampling tube 15 by the pusher 60 and store it in the container 90 .
<Another embodiment of collection tube>
34-39 show another embodiment of the sampling tube (soil sampling tool) 15. FIG. The sampling tube 15 shown in FIGS. 34 to 39 moves in the soil and samples the soil in the same manner as the sampling tube 15 described above. A sampling tube 15 shown in FIGS. 34 to 39 can be applied to the soil sampling apparatus 1 in place of the sampling tube 15 described above. In other words, the sampling tube 15 described below can be applied as the sampling tube of the soil sampling device 1 of all the above-described embodiments.

34, (a) is a cross-sectional view of the sampling tube 15 cut along a plane perpendicular to the axial direction C1, and (b) is a cross-sectional view of the sampling tube 15 cut vertically along a plane parallel to the axial direction C1. is. 35 to 38, (a) is a view of the sampling tube 15 as seen from the intake port 16 side, and (b) is a cross-sectional view of the sampling tube 15 cut vertically along a plane parallel to the axial direction C1. . 39, (a) is a cross-sectional view of the sampling tube 15 cut along a plane perpendicular to the axial direction C1, and (b) is a cross-sectional view of the sampling tube 15 cut vertically along a plane parallel to the axial direction C1. , (c) is a cross-sectional view of the sampling tube 15 cut horizontally along a plane parallel to the axial direction C1.

The sampling tube 15 shown in FIGS. 34 to 39 is open at both ends, one end forming the intake port 16, and the other end forming the discharge port 17, like the sampling tube 15 described above. . The inlet 16 and the outlet 17 are arranged side by side in the axial direction C<b>1 of the collection tube 15 .
In the extraction tube 15 shown in FIG. 34, the distal end (front end) where the intake port 16 opens and the base end (rear end) where the discharge port 17 opens are perpendicular to the axial direction C1. Also, the tip and rear ends of the collection tube 15 are parallel. The collection tube 15 has a cylindrical shape extending linearly, and has a constant outer diameter and inner diameter over the entire length in the axial direction C1. This collection tube 15 has an extraction port 18 for taking out the soil taken in from the intake port 16 . The inlet 16 opens forward in the moving direction, and the outlet 18 opens in a direction intersecting (specifically, perpendicular to) the moving direction. The outlet 18 includes a pair of outlets 18a, 18b. The pair of outlets 18a and 18b are arranged side by side in the axial direction orthogonal to the axial direction C1 of the sampling tube 15 so as to face each other. The outlets 18a and 18b have the same shape and size. Although the collection tube 15 shown in FIG. 34 has a circular cross-sectional shape taken along a plane orthogonal to the axial direction C1, the cross-sectional shape may be rectangular (triangular, quadrangular, hexagonal, etc.).

The collection tube 15 shown in FIGS. 35 to 38 has a tubular portion 15a and a ridge portion 15b.
The tubular portion 15a has an intake port 16 at the front end arranged forward in the movement direction, through which soil can be taken in, and a discharge port 17 at the rear end, through which the soil taken in from the intake port 16 can be discharged. there is The cylindrical portion 15a has an outlet 18 for taking out the soil taken in from the inlet 16. As shown in FIG. The inlet 16 opens forward in the moving direction, and the outlet 18 opens in a direction intersecting (specifically, perpendicular to) the moving direction. The outlet 18 includes a pair of outlets 18a, 18b. The pair of outlets 18a and 18b are arranged side by side in the axial direction perpendicular to the axial direction C1 of the tubular portion 15a. The outlets 18a and 18b have the same shape and size.

As shown in FIGS. 35(b) to 38(b), the ridge portion 15b protrudes from the outer surface of the tubular portion 15a and extends from the front end to the rear end of the tubular portion 15a. . As shown in FIGS. 35(a) to 38(a), the ridge portion 15b projects with a width narrower than the outer diameter of the cylindrical portion 15a. Preferably, the width of the ridge portion 15b is set to be half or less of the outer diameter of the tubular portion 15a. Incidentally, in FIGS. 35(b) to 38(b), the hatching representing the cross section of the protrusion 15b is omitted.

The collection tube 15 shown in FIGS. 35 to 38 is provided with a hardened portion 15d obtained by hardening the ridge portion 15b. The hardened portion 15d has higher hardness than the portion of the ridge portion 15b that is not subjected to the effect treatment and the tubular portion 15a. The hardening treatment is, for example, induction hardening. 35 to 38, the cross-hatched portion is the hardened portion 15d. The hardened portion 15d is provided in the lower portion including the lower end of the ridge portion 15b. However, the hardened portion 15d may be provided on the entire protruded portion 15b.

The sampling tube 15 shown in FIG. 35 differs in the area of the inlet 16 and the area of the outlet 17 . Specifically, the area of inlet 16 is larger than the area of outlet 17 . Both inlet 16 and outlet 17 are circular. The cylindrical portion 15a has a tapered portion 15c whose inner and outer diameters gradually change from the intake port 16 side toward the discharge port 17 side. The tapered portion 15c has an inner diameter and an outer diameter that gradually decrease from the intake port 16 side toward the discharge port 17 side. The width of the ridge portion 15b gradually narrows downward (as it moves away from the cylindrical portion 15a). The ridge portion 15b has an inverted triangular shape when viewed from the intake port 16 side. The lower end of the protrusion 15b is pointed at an acute angle.

The sampling tube 15 shown in FIG. 36 differs in the area of the inlet 16 and the area of the outlet 17 . Specifically, the area of inlet 16 is smaller than the area of outlet 17 . Both inlet 16 and outlet 17 are circular. The cylindrical portion 15a has a tapered portion 15c whose inner and outer diameters gradually change from the intake port 16 side toward the discharge port 17 side. The tapered portion 15c has an inner diameter and an outer diameter that gradually increase from the intake port 16 side toward the discharge port 17 side. The ridge portion 15b has an upper portion 15b1 that protrudes downward with the same width, and a lower portion 15b2 that gradually narrows downward (as the distance from the tubular portion 15a increases). The lower portion 15b2 has an inverted triangular shape when viewed from the inlet 16 side. The lower end of the ridge portion 15b (the lower end of the lower portion 15b2) is pointed at an acute angle.

In the collection tube 15 shown in FIG. 37, the cylindrical portion 15a includes a first cylindrical portion 15a1 forming the inlet 16 and a second cylindrical portion 15a2 forming the outlet 17. As shown in FIG. The opening area of the first tubular portion 15a1 is smaller than the opening area of the second tubular portion 15a2. Accordingly, the area of the intake port 16 and the area of the discharge port 17 are different. Specifically, the area of inlet 16 is smaller than the area of outlet 17 . Both inlet 16 and outlet 17 are circular. The first tubular portion 15a1 is fitted inside the front portion of the second tubular portion 15a2 and protrudes forward from the front end of the second tubular portion 15a2. The ridge portion 15b protrudes from the outer surface of the second tubular portion 15a2 and extends from the front end to the rear end of the second tubular portion 15a2. The width of the ridge portion 15b gradually narrows downward (as it moves away from the cylindrical portion 15a). The ridge portion 15b has an inverted triangular shape when viewed from the intake port 16 side. The lower end of the protrusion 15b is pointed at an acute angle. The ridge portion 15b has a protruding portion 15b3 that protrudes forward from the front end portion of the tubular portion 15a (forward from the front end portion of the first tubular portion 15a1). The front edge of the protruding portion 15b3 is inclined so as to move forward as it goes downward from above. The front end of the projecting portion 15b3 is pointed at an acute angle.

The sampling tube 15 shown in FIG. 38 differs in the area of the inlet 16 and the area of the outlet 17 . Specifically, the area of inlet 16 is smaller than the area of outlet 17 . Also, the shape of the intake port 16 and the shape of the discharge port 17 are different. Specifically, the inlet 16 is circular and the outlet 17 is square. Specifically, the discharge port 17 has a rectangular shape that is longer in the vertical direction than in the width direction (horizontal direction). The tubular portion 15a has a tapered portion 15c whose opening area changes gradually from the intake port 16 side toward the discharge port 17 side. In the tapered portion 15c, the distance between the upper end and the lower end gradually widens from the intake port 16 side toward the discharge port 17 side. The ridge portion 15b has an upper portion 15b1 that protrudes downward with the same width, and a lower portion 15b2 that gradually narrows downward (as the distance from the tubular portion 15a increases). The lower portion 15b2 has an inverted triangular shape when viewed from the inlet 16 side. The lower end of the ridge portion 15b (the lower end of the lower portion 15b2) is pointed at an acute angle. The ridge portion 15b has a protruding portion 15b3 that protrudes forward from the front end portion of the tubular portion 15a. The front edge of the protruding portion 15b3 is inclined so as to move forward as it goes downward from above. The front end of the projecting portion 15b3 is pointed at an acute angle.

The tubular portion 15a of the sampling tube 15 shown in FIGS. 35 to 38 is cut along a plane perpendicular to the axial direction C1 except for the outlet 17 side of the tubular portion 15a of the sampling tube 14 shown in FIG. Although the cross-sectional shape is circular, the cross-sectional shape may be square (triangular, quadrangular, hexagonal, etc.). Moreover, when adopting the usage method which does not require the outlet 18, the outlet 18 can be omitted.
35 to 38 may be provided on the sampling tube 15 shown in FIG. 34 or the sampling tubes 15 shown in FIGS. 1 to 5 and the like.

In the sampling tube 15 shown in FIG. 39, the distal end (front end) where the intake port 16 is open and the base end (rear end) where the discharge port 17 is open are perpendicular to the axial direction C1. Also, the leading end and the trailing end are parallel. The collection tube 15 has a cylindrical shape extending linearly, and has a constant outer diameter and inner diameter over the entire length in the axial direction C1. This collection tube 15 has an extraction port 18 for taking out the soil taken in from the intake port 16 . The inlet 16 opens forward in the moving direction, and the outlet 18 opens in a direction intersecting (specifically, perpendicular to) the moving direction. The outlets 18 include a pair of outlets 18 (outlets 18a, 18b) arranged opposite to each other. The outlets 18a and 18b are arranged in an axial direction perpendicular to the axial direction C1 of the sampling tube 15 and face each other. The outlets 18a and 18b have the same shape and size. A plurality of pairs of outlets 18 are provided. A plurality of pairs of outlets 18 are arranged side by side at intervals in the axial direction C1. In FIG. 39, the number of pairs of outlets 18 is 5, but may be 2 to 4, or may be 6 or more. The collection tube 15 shown in FIG. 39 has a circular cross-sectional shape taken along a plane perpendicular to the axial direction C1.

When the sampling tube 15 shown in FIG. 39 is used, while moving the sampling tube 15 from which the soil has been sampled in the axial direction C1, the pushers 60 described above are sequentially inserted into the plurality of pairs of outlets 18 one by one. As a result, the soil sampled in the sampling tube 15 can be pushed out from each pair of outlets 18 in order.
<effect>
According to the working vehicle provided with the soil sampling device 1, the soil sampling tool (sampling pipe 15), and the soil sampling device 1 of the above embodiment, the following effects are obtained.

The soil sampling device 1 is a soil sampling device 1 attached to a traveling body 2, and is a sampling pipe having an intake 16 capable of taking in soil and an outlet 17 capable of discharging the soil taken in from the intake 6. 15, and an elevating mechanism 20 capable of elevating the sampling tube 18 between a lowered position P1 located below the ground and a raised position P2 located above the ground. are arranged side by side in the axial direction C1.

According to this configuration, since the intake port 16 and the discharge port 17 of the sampling pipe 15 are arranged side by side in the axial direction C1, the soil is discharged from the intake port 16 of the sampling pipe 15 as the traveling body 2 travels. It becomes possible to circulate to the discharge port 17 . Therefore, by arranging the sampling pipe 15 at a desired depth under the ground and raising it at a desired location, soil at a desired depth can be efficiently collected.

Also, the sampling pipe 15 has an inlet 16 and an outlet 17 arranged side by side in the movement direction of the traveling body 2 .
According to this configuration, the soil can be smoothly circulated from the intake port 16 of the sampling pipe 15 to the discharge port 17 as the traveling body 2 travels. Therefore, it is possible to efficiently collect soil at a desired depth.

The elevating mechanism 20 includes a fixed body 21 attached to the traveling body 2, an elevating body 23 provided to be able to move up and down with respect to the fixed body 21 and having the collection tube 15 attached thereto, and a driving mechanism for elevating the elevating body 23. and a mechanism 22 .
According to this configuration, the extraction tube 15 can be moved up and down with respect to the traveling body 2 by driving the driving mechanism 22 to move the lifting body 23 up and down. Therefore, the height (depth) of the sampling tube 15 can be changed and set based on the height of the traveling body 2 .

The drive mechanism 22 has a drive source 25 and a drive gear 26 that rotates by power from the drive source 25, and the elevating body 23 has teeth 23a that mesh with the drive gear 26 arranged along the elevation direction. ing.
According to this configuration, the lifting body 23 can be lifted and lowered by utilizing the engagement between the driving gear 26 and the teeth 23a of the lifting body 23, so that the lifting body 23 can be moved reliably and quickly without requiring a complicated structure. It can be raised and lowered.

The lifting mechanism 20 includes a pipe 33 having a non-circular cross-section attached to the fixed body 21 . The driving mechanism 22 includes a driving source 34 and a driving mechanism 22 which is inserted through the pipe 33 and driven by power from the driving source 34 to rotate around the center axis. The elevating body 23 is fitted into the pipe 33 so as to be movable along the pipe 33 without being rotatable around the central axis, and is engaged with the screw shaft 35. 233.

According to this configuration, the lifting body 23 can be lifted and lowered using the rotation of the screw shaft 35, so that the lifting body 23 can be lifted and lowered reliably and with a strong force without requiring a complicated structure. In addition, since the elevating body 23 cannot rotate around the central axis, it is possible to prevent the orientation of the collection tube 15 from changing due to the elevating body 23 rotating around the central axis.
Further, the lifting body 23 has an earth cutting edge 23c, which is located under the ground when the sampling tube 15 is at the lowered position P1, and whose width gradually becomes narrower toward the front side in the traveling direction.

According to this configuration, when the lifting body 23 moves under the ground together with the sampling tube 15, it can move while cutting the soil with the soil cutting blade 23c. Therefore, the resistance of soil can be reduced and the lifting body 23 can be moved smoothly.
Further, the sampling tube 15 has a center line connecting the center of the intake port 16 and the center of the discharge port 17 arranged in the horizontal direction.

According to this configuration, the soil can be smoothly circulated from the intake port 16 toward the discharge port 17 when the sampling pipe 15 is moved in the soil along with the movement of the traveling body 2 . Therefore, the resistance that the sampling tube 15 receives from the soil can be reduced, and the soil can be smoothly sampled.
The traveling body 2 is the tractor 2 , and the lifting mechanism 20 is attached to the ground working machine 4 attached to the rear portion of the tractor 2 .

According to this configuration, while the tractor 2 is traveling and the ground work is performed by the ground work machine 4, soil can be collected at the same time.
The soil sampling device 1 also includes a sampling tube 15 for sampling soil, and a pusher 60 for pushing out the soil sampled in the sampling tube 15. The sampling tube 15 has an intake 16 for taking in the soil, and an extraction port 18 for taking out the soil taken in from the intake port 16, the intake port 16 opening toward one side of the axial direction C1 of the sampling pipe 15, and the extraction port 18 being in the axial direction C1. The pusher 60 pushes out the soil from the outlet 18 with an opening facing the cross direction.

According to this configuration, of the soil taken into the collection pipe 15 from the intake port 16, only the soil at the position facing the extraction port 18 can be pushed out by the pushing tool 60 and taken out. Therefore, even if the sampling tube 15 is not sufficiently filled with soil, a certain amount of soil can be accurately sampled.
The outlet 18 includes a pair of outlets 18a and 18b arranged to face each other, and the pusher 60 moves from one of the pair of outlets 18a and 18b to the other to push out the soil.

According to this configuration, the soil taken in the sampling tube 15 can be reliably pushed out by the pushing tool 60 and taken out.
A lifting mechanism 20 for lifting the sampling tube 15 is provided, and the lifting mechanism 20 moves the sampling tube 15 between a sampling position P1 where soil is sampled from the ground and an extraction position P2 where the soil is pushed out by the pushing tool 60. Let

According to this configuration, the collecting tool 15 can be moved from the collecting position P1 to the taking-out position P2 by the lifting mechanism 20, and the soil in the collecting tube 15 moved to the taking-out position P2 can be pushed out by the pusher 60. Collection and extraction can be efficiently performed in a series of operations.
The soil sampling apparatus 1 also includes a container 90 for receiving the soil pushed out by the pushing tool 60. The container 90 has a receiving port 99 for receiving the soil. The soil is guided to the inlet 99 by being inserted into the inlet 99 .

According to this configuration, the soil collected by the collection tube 15 can be accommodated in the container 90 via the receiving port 99 by the pushing tool 60 . Therefore, the operation of transferring the soil collected in the collection tube 15 to the container 90 can be performed efficiently and smoothly.
Further, the container 90 has a plurality of storage portions 91 partitioned by partition walls 98, and each of the plurality of storage portions 91 has a receiving port 99, and each receiving port 99 is an insertion position P4 into which the pushing tool 60 can be inserted. sequentially move to

According to this configuration, soil collected at a plurality of different locations can be divided and stored in a plurality of storage sections 91 partitioned by partition walls 98 . Therefore, soil collected at a plurality of different locations can be stored in one container 90 without being mixed together. Moreover, the soil can be continuously and efficiently stored in the plurality of storage portions 91 .
The soil sampling apparatus 1 also includes an interlocking mechanism 100 that moves the receiving port 99 to the insertion position P4 in conjunction with the elevation of the sampling tube 15 from the sampling position P1 to the extraction position P2.

According to this configuration, since it is possible to move the receiving port 99 of the container 90 to the insertion position P4 in time with the timing when the sampling tube 15 rises, the soil sampled by the sampling tube 15 can be quickly pushed out. It can be extruded by 60 and stored in container 90 .
Further, the container 90 is rotatable around a central axis 92 parallel to the moving direction of the pusher 60, and the plurality of accommodating portions 91 are arranged around the central axis 92 in the circumferential direction and arranged around the central axis 92. , and then sequentially move to the insertion position P1.

According to this configuration, the container 90 having the plurality of storage portions 91 can be arranged in a small space, and the mechanism for moving the storage portions 91 to the insertion position P1 can be miniaturized.
The soil sampling device 1 also includes a moving mechanism 61 that moves the pushing tool 60 between a first position for pushing out the soil from the outlet 18 and a second position for disengaging from the outlet 18. The moving mechanism 61 includes: A biasing member 63 that biases the pusher 60 in the direction of moving it to the first position, a holding state that holds the pusher 60 at the second position against the biasing force of the biasing member 63, and a release that releases the holding. and a switching unit 64 for alternately switching between the states.

According to this configuration, the moving mechanism 61 can reliably and smoothly move the pusher 60 back and forth between the first position and the second position.
In addition, the soil sampling apparatus 1 includes a sampling tube 15 having an inlet 16 capable of taking in soil at one end, and a soil sampling position P1 and a soil sampling position P1 above the sampling position P1. A lifting mechanism 20 capable of moving up and down to a take-out position P2 from which soil is taken out, and a lid member 40 that inhibits take-in of soil from the intake port 16 between the take-out position P1 and the take-out position P2 are provided.

According to this configuration, the lid member 40 inhibits the intake of soil into the sampling pipe 15 between the sampling position P1 and the extraction position P1, thereby preventing the soil from being sampled at a depth different from that of the sampling position P1. can be prevented, and the soil at the desired depth can be reliably and efficiently sampled.
The collecting pipe 15 has an outlet 17 for discharging the soil discharged from the inlet 16 at the other end, and the lid member 40 is positioned between the inlet 16 and the outlet between the sampling position P1 and the extraction position P2. At least one opening 19 of 17 is closed.

According to this configuration, the cover member 40 closes the opening 19 between the sampling position P1 and the extraction position P2, thereby preventing soil at a depth different from that of the sampling position P1 from being collected. , the soil collected in the collection pipe 15 can be prevented from spilling out of the opening 19 between the collection position P1 and the extraction position P2.
Further, the lid member 40 opens the opening 19 at the collecting position P1 and closes the opening 19 at least in the soil above the collecting position P1.

According to this configuration, soil can be taken into the sampling tube 15 at the sampling position P1, and soil can be prevented from being taken into the sampling tube 15 in the soil above the sampling position P1.
Further, the lid member 40 opens the opening 19 at the collection position P1 and closes the opening 19 over the entire area between the collection position P1 and the removal position P2.

According to this configuration, soil can be taken into the sampling tube 15 at the sampling position P1, and soil can be prevented from spilling from the sampling tube 15 between the sampling position P1 and the extraction position P2.
Further, when the sampling tube 15 is at the sampling position P1, the lid member 40 waits at a standby position P3 above the sampling position P1 and below the extraction position P2. When it rises from to the extraction position P3, it rises together with the collection tube 15.

According to this configuration, when the sampling tube 15 ascends from the sampling position P1 to the extraction position P2, the cover member 40 can be raised from the standby position P3 to the extraction position P2 along with the sampling tube 15.
The soil sampling apparatus 1 also includes a biasing means 45 that applies a biasing force to lower the cover member 40 to the standby position P3. 15, the lid member 40 is lifted.

According to this configuration, the biasing force of the biasing means 45 can reliably cause the cover member 40 to wait at the standby position P3.
In addition, the lifting mechanism 20 has a fixed body 21 whose vertical position is fixed, and a lifting body 23 that can move up and down with respect to the fixed body 21 and to which the collection tube 15 is attached. It has a contact plate 47 that contacts the lid member 40 when the elevating body 23 is raised.

According to this configuration, the lid member 40 can be reliably lifted as the elevating body 23 is lifted.
The lid member 40 is attached to the sampling tube 15 and includes opening/closing plates 40C1 and 40C2 that can open or close the opening 19 by swinging. is urged in the direction of opening the opening 19, and when it rises from the sampling position P1, it receives the resistance of the soil and swings against the urging force to close the opening 19. - 特許庁

According to this configuration, the opening 19 can be opened or closed by the lid member 40 without requiring a large-scale structure.
The soil sampling apparatus 1 also includes a sampling tube 15 for sampling soil, a setting unit 122 for setting the position of the sampling tube 15 at a predetermined position, and the soil in the sampling tube 15 set at the predetermined position by the setting unit 122. and a pusher 60 for pushing out of the collection tube 15 .

According to this configuration, the soil in the sampling tube 15 set at a predetermined position by the setting unit 122 can be pushed out of the sampling tube 15 by the pushing tool 60, so that a complicated sampling tube is not required. The collected soil can be easily taken out.
Further, a container 90 for receiving the soil pushed out by the pusher 60 is provided, and the pusher 60 penetrates the collection tube 15 and enters the container 90 .

According to this configuration, the soil collected in the collection tube 15 can be pushed out into the container 90 by the pushing tool 60 . Therefore, the operation of transferring the soil collected in the collection tube 15 to the container 90 can be performed easily and efficiently.
The sampling tube 18 has a pair of outlets 18a and 18b arranged facing each other, the container 90 has a receiving port 99 for receiving soil, and the pusher 60 has a pair of outlets 18a and 18b. is inserted into the receiving port 99 through the .

According to this configuration, the soil collected in the collection tube 18 can be reliably pushed out by the pusher 60 and transferred from the receiving port 99 to the container 90 .
Further, a moving mechanism 61 is provided to move the pushing tool 60 between a first position passing through the pair of outlets 18 a and 18 b and a second position away from the outlet 18 .
According to this configuration, by moving the pushing tool 60 with the moving mechanism 61, the work of pushing out the soil from the sampling tube 15 by the pushing tool 60 can be easily performed.

Further, the moving mechanism 61 (second moving mechanism 61B) includes a swingable operating lever 120 and a conversion mechanism that converts swinging of the operating lever 120 into reciprocating movement of the pusher 60 between the first position and the second position. 121 and .
According to this configuration, by manually operating the operating lever 120, the soil can be pushed out from the outlet 18 of the sampling tube 15 into the container 90 with a strong force. Therefore, even if the soil collected in the collection tube 15 hardens and cannot be easily pushed out, the soil can be reliably pushed out from the collection tube 15 .

Further, the container 90 has a plurality of storage portions 91 partitioned by partition walls 98, and each of the plurality of storage portions 91 has a receiving port 99, and each receiving port 99 is an insertion position P4 into which the pushing tool 60 can be inserted. sequentially move to
According to this configuration, the soil collected at a plurality of different locations can be stored in one container 90 without being mixed, and the soil stored in each storage section 91 can be pushed out in order by the pushing tool 60. can be done.

The soil sampling apparatus 1 also includes an elevating mechanism 20 for elevating the sampling tube 15. The elevating mechanism 20 moves the sampling tube 15 between a sampling position P1 for sampling soil and a predetermined position (retrieving position) P2. move.
According to this configuration, the lifting mechanism 20 can move the sampling tube 15 between the sampling position P1 and the predetermined position (retrieving position) P2, so that the soil sampling and the soil extraction can be performed continuously and efficiently. can be done.

Further, the working vehicle includes a vehicle body 6 having a driver's seat 3, a ground working machine 4 that can move up and down with respect to the vehicle body 6 and performs work on a field, and the soil sampling device 1. The lever 120 is arranged at a position that can be operated from the driver's seat 3 when the ground work implement 4 is raised with respect to the vehicle body.
According to this configuration, the operator of the work vehicle can operate the operation lever 120 without getting off the driver's seat 3, so workability is excellent.

Further, the ground working machine 4 is a rotary tiller 4 for tilling a field.
According to this configuration, while the tractor 2 is traveling and the soil is tilled by the rotary tiller 4, soil can be collected at the same time.
Also, the soil sampling tool (sampling tube) 15 is a soil sampling tool that moves in the soil and samples soil, and has an intake port 16 that can take in the soil at the front end portion arranged forward in the movement direction. A cylindrical portion 15a having a discharge port 17 capable of discharging the soil taken in from the intake port 16 at the rear end, and a projecting portion having a width narrower than the outer diameter of the cylindrical portion 15a on the outer surface of the cylindrical portion 15a. and a ridge portion 15b extending from the front end to the rear end.

According to this configuration, the soil can be collected by the tubular portion 15a by moving through the soil while cutting the soil by the protruding portion 15b. can be collected at
Further, the area of the intake port 16 and the area of the discharge port 17 of the cylindrical portion 15a are different.
According to this configuration, it is possible to adjust the balance between the intake of soil from the intake port 16 and the discharge of soil from the discharge port 17 .

Also, the area of the inlet 16 is smaller than the area of the outlet 17 .
According to this configuration, the soil is smoothly discharged from the discharge port 17, so that clogging of the cylindrical portion 15a with soil can be effectively prevented.
Also, the area of the inlet 16 is larger than the area of the outlet 17 .
According to this configuration, soil can be smoothly taken into the cylindrical portion 15a from the inlet 16. As shown in FIG.

Further, the ridge portion 15b has a projecting portion 15b3 that projects forward from the front end portion.
According to this configuration, when the soil sampling tool (sampling tube) 15 moves in the soil, it can move while cutting the soil with the projecting portion 15b3 in front of the cylindrical portion 15a, thereby reducing soil resistance. It is possible to move smoothly.
Further, the front end of the projecting portion 15b3 is pointed at an acute angle.

According to this configuration, it is possible to move while the front end of the protruding portion 15b3 is digging into the soil, so that the resistance of the soil is greatly reduced and smooth movement is possible.
Further, the lower end of the ridge portion 15b is pointed at an acute angle.
According to this configuration, since it is possible to move while cutting the soil with the lower end of the protrusion 15b, it is possible to greatly reduce the resistance of the soil and move smoothly.

Further, the tubular portion 15a includes a first tubular portion 15a1 that forms the intake port 16 and a second tubular portion 15a2 that forms the discharge port 17. The opening area of the first tubular portion 15a1 is the second It is smaller than the opening area of the cylindrical portion 15a2.
According to this configuration, the soil is smoothly discharged from the discharge port 17, so that clogging of the cylindrical portion 15a with soil can be effectively prevented. Further, the strength is improved by configuring the tubular portion 15a from two tubular portions.

Further, the tubular portion 15a has a tapered portion 15c whose inner diameter gradually changes from the intake port 16 side toward the discharge port 17 side.
According to this configuration, the inner diameters of the intake port 16 and the discharge port 17 can be made different, and the flow of soil from the intake port 16 having a different inner diameter to the discharge port 17 can be facilitated.
In addition, the cylindrical portion 15a has an outlet 18 for taking out the soil taken in from the inlet 16. The inlet 16 opens forward in the moving direction, and the outlet 18 extends in a direction intersecting the moving direction. The opening is facing the

According to this configuration, of the soil taken into the cylindrical portion 15a from the inlet 16, only the soil at the position facing the outlet 18 can be pushed out by the pusher 60 and taken out. Therefore, even if the cylindrical portion 15a is not sufficiently filled with soil, it is possible to collect a certain amount of soil accurately.
Further, according to the soil sampling apparatus 1 having the soil sampling tool 15, soil resistance can be reduced when the soil sampling tool 15 moves through the soil, and the soil can be smoothly sampled.

Although one embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative in all respects and is not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

1 Soil Sampling Device 15 Sampling Pipe 16 Inlet 18 Outlet 18a, 18b Pair of Outlets 20 Elevating Mechanism 60 Extruding Tool 61 Moving Mechanism 63 Biasing Member 64 Switching Portion 90 Container 92 Central Axis 98 Partition Wall 99 Receiving Port 100 Interlocking Mechanism 1 Axial direction P1 Extraction position P2 Extraction position P4 Insertion position

Claims (8)

a sampling tube for sampling soil;
an extruder for extruding the soil collected in the collection tube;
with
The collection tube has an intake for taking in soil and an outlet for taking out the soil taken in from the intake,
the intake port opens toward one of the axial directions of the collection tube, the extraction port opens toward the direction intersecting with the axial direction;
The pushing tool is a soil sampling device for pushing soil from the outlet. The outlet includes a pair of outlets arranged facing each other,
2. The soil sampling device according to claim 1, wherein said pushing tool moves from one of said pair of outlets toward the other to push out the soil. An elevating mechanism for elevating the collection tube is provided,
3. The soil sampling apparatus according to claim 1, wherein the elevating mechanism moves the sampling tube between a sampling position for sampling the soil in soil and an extraction position for pushing the soil out by the pushing tool. A container for receiving the soil extruded by the extruding tool,
The container has a receiving port for receiving soil,
4. The soil sampling apparatus according to claim 3 , wherein the pushing tool is inserted through the outlet and into the receiving port to guide the soil to the receiving port. The container has a plurality of storage units partitioned by partition walls,
5. The soil sampling apparatus according to claim 4, wherein each of said plurality of housing portions has said receiving port, and each receiving port moves sequentially to an insertion position into which said pushing tool can be inserted. 6. The soil sampling apparatus according to claim 5, further comprising an interlocking mechanism that moves the receiving port to the insertion position in conjunction with the upward movement of the sampling pipe from the sampling position to the extraction position. The container is rotatable around a central axis parallel to the direction of movement of the pusher,
The soil sampling device according to claim 5 or 6, wherein the plurality of storage portions are arranged in a circumferential direction around the central axis, and are sequentially moved to the insertion position by rotating about the central axis. a moving mechanism for moving the pushing tool to a first position where the soil is pushed out from the outlet and a second position where the soil is separated from the outlet;
The moving mechanism includes an urging member that urges the pusher in a direction to move it to the first position, and a holding state that holds the pusher at the second position against the urging force of the urging member. The soil sampling device according to any one of claims 1 to 7, further comprising a switching unit for alternately switching between the holding state and the released state of releasing the holding.

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