JP2015173636A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter capable of preventing damage to a sensor by contacting a farm field or a headland at a time when a machine body is backed, turned, etc.SOLUTION: A rice transplanter equipped with a float that detects a farm field contact area includes a sensor, provided separately from the float, for detecting a farm field surface. The sensor includes a detection part for tracking the farm field surface and a support part for swingably supporting the detection part, and can be held in a state that the detection part is rocked upward with a swing shaft included in the support part of the sensor being a fulcrum.

Description

  The present invention relates to a rice transplanter.

  In Patent Document 1, a rice planting is provided that is provided separately from the float that detects the ground contact surface of the field, and that includes a sensing sensor that senses the surface of the field, and detects the height of the seedling planting device relative to the field surface from the amount of swing of the sensing sensor A machine is disclosed.

JP-A-10-295121

  In a rice transplanter equipped with a sensor for detecting the field surface, there is a possibility that the tip of the sensor that follows the field surface penetrates into the soil in the field when the machine moves backward.

  The rice transplanter of the present invention is a rice transplanter provided with a float for detecting a ground contact surface of a farm, and is provided separately from the float, and includes a sensor for detecting a field surface of the farm, and the sensor detects the surface of the farm field. And a support portion that supports the detection portion in a swingable manner, and can be held in a state where the detection portion is swung upward with a swing shaft included in the support portion of the sensor as a fulcrum.

  The sensor is held in a state of being swung upward with the rocking shaft as a fulcrum when at least the main transmission lever is in the reverse position.

  A structure for interlocking the upward swing operation of the sensor and the operation of the main speed change lever is configured using a wire, and the tension of the wire is adjusted in conjunction with a reverse operation of the main speed change lever, and the sensor Can be held in a state of swinging upward with the swing shaft as a fulcrum.

  ADVANTAGE OF THE INVENTION According to this invention, the damage of the sensor by contacting with a farm field can be prevented at the time of reverse of a body.

It is a side view of a rice transplanter. It is a top view of a planting part. It is a side view of a planting part. It is a perspective view of a sensor. It is a figure which shows storing operation of a sensor. It is a figure which shows the interlocking structure of a sensor and a lever. It is a figure which shows another embodiment of the interlocking structure of a sensor and a main transmission lever. It is a figure which shows the structure which rocks | fluctuates a sensor upwards with a wire.

As shown in FIG. 1, the rice transplanter 1 includes an engine 2, a power transmission unit 3, a planting unit 4, and a lifting unit 5. The planting unit 4 is connected to the airframe via the lifting unit 5, and can be automatically moved up and down by controlling the operation of the lifting unit 5. Power from the engine 2 is transmitted to the planting unit 4 via the power transmission unit 3. The rice transplanter 1 plants seedlings in the field by the planting unit 4 while traveling by driving the engine 2.
This embodiment demonstrates the case where the seedling planting operation | work by the predetermined planting depth is performed from the field surface in the state where the rice field water was stretched in the field. It should be noted that the same technical idea can be applied to planting work in a state where the rice field water is not stretched in the field.

  The driving force from the engine 2 is transmitted to the PTO shaft 7 through the transmission 6 in the power transmission unit 3. The PTO shaft 7 is provided to protrude rearward from the transmission 6. Power is transmitted from the PTO shaft 7 to the planting transmission case 8 through the universal joint, and the planting unit 4 is driven. A drive shaft 9 is provided rearward from the transmission 6, and a driving force is transmitted from the drive shaft 9 to the rear axle case 10.

The planting unit 4 includes a planting arm 11, a planting claw 12, a seedling stage 13, a float 14, and the like. The planting claw 12 is attached to the planting arm 11. The planting arm 11 is rotated by the power transmitted from the planting transmission case 8.
A seedling is supplied to the planting claw 12 from a seedling stage 13. With the rotational movement of the planting arm 11, the planting claws 12 are inserted into the field, and seedlings are planted so as to have a predetermined planting depth (the amount of nail protrusion of the planting claws 12). In this embodiment, a rotary planting claw is employed, but a crank type may be used.

[float]
As shown in FIG. 2, the planting unit 4 includes a plurality of floats (a center float 14 </ b> A and two side floats 14 </ b> B in the present embodiment) arranged in the left-right direction. Each float is attached to a planting frame 15 constituting the planting unit 4. More specifically, the front end of each float is supported so as to be swingable in the vertical direction with respect to the planting frame 15, and the rear end of each float is linked to a rotation support shaft 16 provided on the planting frame 15. It is attached to be movable up and down via.
As shown in FIG. 3, an appropriate sensor such as a potentiometer is attached to the rotation support shaft 16 or the link mechanism 17, and the link height h0 is detected by the sensor. This link height h0 is detected as the amount of protrusion of the planting claw 12 (the distance between the tip of the planting claw 12 and the bottom surface of the float). Then, as will be described later, the actual planting depth h (h = h0 + d) is detected using the settlement amount d of the center float 14A.

  The center float 14A arranged at the center is used as a float detection body for detecting the ground contact surface of the field. Specifically, the target angle β of the float is determined based on the swing angle of the center float 14A that changes according to the unevenness of the field (the rotation angle in the pitching direction according to the resistance received on the front surface of the float: the float angle α). However, the planting part height (planting depth) is controlled so that the float angle α approaches the target angle β.

[Leveling equipment]
As shown in FIG. 2, a leveling device 20 for headland leveling is provided in front of the planting unit 4 and in front of the floats 14 (14 </ b> A and 14 </ b> B). The leveling device 20 is supported by the planting frame 15 so that the height can be changed.
A part of the power from the drive shaft 9 is branched to the leveling transmission shaft 21 via the rear axle case 10, and directed to both sides from the leveling transmission shaft 21 via the universal joint 22, the input shaft 23 and the leveling transmission case 24. Is transmitted to the extended drive shaft 25. A plurality of rotors 26 are fixed to each drive shaft 25, and the rotor 26 is rotated by the rotational drive of the drive shaft 25 to level the field.

  The leveling device 20 is disposed in such a manner that the center is disposed forward, and is inclined from the front toward the rear as it goes from the center to both sides. That is, it is provided so that the central portion is positioned in front of other portions. When viewed from above, the leveling device 20 is arranged in a letter C shape.

  A space can be secured in front of the center float 14 </ b> A by arranging the leveling device 20 in a U-shape when viewed from above. By using this space to move the center float 14A forward, a sensor 30 described later can be arranged without difficulty between the flat part of the center float 14A and the planted seedling. Moreover, even if the position of the rotation support shaft 16 of the center float 14A is arranged at the same side surface position as the side float 14B, the center float 14A can be made as long as possible by using the space in front of the center float 14A.

  Alternatively, using the space formed by the leveling device 20, the position of the rear end surface of the center float 14A can be left as it is, and the front end surface can be extended forward. Improvements can be made. Further, by increasing the area of the center float 14A, the sensing ability is increased, and the raising and lowering of the planting part 4 can be optimally controlled. Furthermore, when changing the float shape of the center float 14 </ b> A, the flow and shape balance of the mud flow can be optimally designed, and the accuracy of the lifting control of the planting unit 4 can be further improved.

[Sensor]
As shown in FIGS. 2 and 3, in the center float 14 </ b> A, a sensor 30 that detects the field surface is provided immediately before the planting position P of the planting unit 4. The sensor 30 extends from the front toward the rear. The sensor 30 is supported by the planting frame 15 so as to be swingable in the pitching direction, and hangs down by gravity around the swing fulcrum, so that the state where the tip is in contact with the field surface is maintained. That is, the rice transplanter 1 proceeds so that the tip of the sensor 30 always follows the field surface.
By measuring the rocking angle θ of the sensor 30, the positional relationship between the sensor 30 and the field can be detected, and the actual height of the field (the height of the field on which the seedling is planted) can be detected. Thus, by detecting the actual height of the field with the sensor 30, the subsidence amount d of the center float 14A (the amount of subsidence into the mud field) can be measured.

As described above, the sensor 30 is provided separately from the center float 14 </ b> A used for detecting the field ground contact surface, and the field surface is detected in the vicinity of the planting position P by the sensor 30. Thus, by realizing sensing immediately before planting seedlings with the sensor 30, the sensing accuracy can be improved.
In this embodiment, the planting position P is the side of the rear end portion of the float that rotates via the link mechanism 17. In addition, the position immediately before the planting position P is a field after leveling with a float to plant seedlings, and in order to sense such a stable field, the uneven shape appearing on the surface of the field is a sensor. 30 and the influence of the muddy water flow caused by the float on the sensor 30 can be reduced.

As shown in FIGS. 2 and 3, the sensor 30 includes a detection unit 31 that follows the unevenness of the field surface and a support unit 32 that supports the detection unit 31 so as to be swingable in the pitching direction.
The detection unit 31 is configured by a plurality of rod bodies 40, and is formed in a rake shape by supporting the same ends of the plurality of rod bodies 40 on the stay 41. Each rod 40 is arranged in parallel in the front-rear direction, and in a side view, extends from the base part toward the rear lower side, and the tip part following the field surface has an angle with the horizontal plane from the base part side. It is bent from the middle so that it becomes smaller. The stay 41 is fixed to the column 42.
The support portion 32 includes a stay 41 that supports each rod body 40, a support column 42 that supports the stay 41, and a swing shaft 43 provided on the planting frame 15. The base end portion of the support column 42 is wound around the swing shaft 43. That is, the swing shaft 43 supports the support column 42 so as to be swingable.
As described above, the detection unit 31 is supported by the support unit 32 in a swingable manner, and detects the field surface by measuring the swing angle when the detection unit 31 follows the field surface.

  As shown in FIG. 4, each bar 40 of the detection unit 31 is formed in a linear shape. After the bars 40 are arranged in parallel, they are fixed to an iron stay 41 and configured in a rake shape. ing. Each rod 40 can be molded individually or integrally so as to connect the base sides thereof. As the rod 40 having a linear shape, a wire or the like having a strength that can hold the shape with respect to a desired length is suitable. The base of each rod 40 is fixed to the stay 41.

Each rod 40 has, for example, a wire diameter of 3 mm and a pitch of 10 mm. In this way, by configuring each rod body 40 to be elongated, the contact area with the farm field and the rice field water is reduced, the lift due to the water flow is reduced, and the detection unit 31 is made difficult to leave the farm field. At the same time, by configuring the detection unit 31 in a rake shape, foreign substances are prevented from being caught between the rod bodies 40, and drainage is improved.
Further, by forming the rod body 40 into a linear shape, it is difficult to be influenced by buoyancy, and the field surface can be followed even when the machine is traveling on a paddy field at high speed.
In addition, as a material constituting the rod body 40, a resin can be used in addition to a metal such as iron. Resin has good moldability and is lighter than iron or the like, so it is difficult to sink against the mud surface of the field.

[Storage of sensor]
As shown in FIG. 5, the wire 50 is connected to the proximal end of the support column 42. The wire 50 extends upward from the connecting portion with the support column 42 and is configured to be able to move the support column 42 upward.
By pulling the wire 50 upward, the support column 42 connected to the wire 50 is swung upward with the rocking shaft 43 as a fulcrum, and the detection unit 31 is swung upward. And the tension | tensile_strength with respect to the wire 50 is maintained, The detection part 31 can be hold | maintained in the state rock | fluctuated upwards. In other words, the detection unit 31 can be retracted from the field surface by storing the sensor 30 upward. In this way, by storing the sensor 30 upward when the vehicle is moving backward, it is possible to avoid the tip of the detection unit 31 from penetrating into the soil of the field, and to prevent the sensor 30 from being damaged.
Moreover, when storing the sensor 30 upward, it is possible to shake off impurities and the like accumulated on the detection unit 31, and the sensor 30 can be expected to maintain the sensing accuracy of the field surface.

  By connecting the wire 50 closer to the base end of the support column 42, it is possible to reduce the influence on the action of the moment when the sensor 30 swings, so that the influence of the sensor 30 on the field surface sensing can be reduced.

In the rice transplanter 1, the planting part 4 is raised at the time of reverse of the body and at the time of turning of the body. Therefore, by interlocking the storing operation of the sensor 30 with the lifting / lowering operation of the planting unit 4, it is possible to prevent the tip of the sensor 30 from penetrating into the soil of the farm field when the vehicle is moving backward.
Specifically, as shown below, the ascending / descending operation of the planting unit 4 and the storing operation of the sensor 30 are linked and connected via a wire 50.

The other end of the wire 50 (the end opposite to the side connected to the support 42) is separated from the connection with the support 42 (more specifically, the position of the connection when not raised) when the planting part 4 is raised. It connects with the place which can maintain the tension | tensile_strength of the wire 50 so that the detection part 31 may be maintained in an upper storage position after the planting part 4 raises.
With this configuration, according to the ascending operation of the planting unit 4, the detection unit 31 gradually swings upward with the swing shaft 43 as a fulcrum, and maintains this state. When the planting unit 4 enters the descending operation, the detection unit 31 gradually swings downward according to the descending operation, and returns to the position where the field surface can be sensed when the planting unit 4 descends to the planting position.

The storing operation above the sensor 30 can be realized by using an operation tool such as a lever.
As shown in FIG. 6, a lever 51 that can store the sensor 30 is provided. The sensor 30 and the lever 51 are connected via a wire 50, and the sensor 30 can be accommodated upward by operating the lever 51.
The lever 51 has an operating body 52 and an arm 53 extending downward from the operating body 52, and a wire 50 is connected to the other end (lower end) of the arm 53. The lever 51 is configured to be rotatable about a rotation fulcrum 54 provided in the middle part of the arm 53. By operating the lever 51, the tension of the wire 50 is adjusted, and the sensor 30 is accommodated.
For example, by placing the lever 51 on the steering column, the storage operation of the sensor 30 can be easily performed when the aircraft is operated.

With the above configuration, the sensor 30 can be accommodated upward in accordance with the operation of the lever 51. Therefore, by operating the lever 51 when the vehicle is moving backward, the sensor 30 can be stored upward, and the tip of the detection unit 31 that follows the surface of the field can be prevented from penetrating into the soil of the field. Can be suppressed.
The above-described configuration may be any configuration as long as the housing of the sensor 30 can be operated. For example, a switch is provided in place of the lever 51 and the tension of the wire 50 is changed according to the operation of the switch to store the sensor 30. It is good also as composition to do.

[Linked with main shift lever operation]
More preferably, the storing operation of the sensor 30 is interlocked with the operation of the main transmission lever 60.
The main speed change lever 60 is linked to the transmission 6 and operates the main speed change lever 60 along a guide groove formed in the steering column, so that the traveling mode of the rice transplanter 1 is advanced, neutral, reverse, seedling. It is possible to switch to each travel mode such as connection and movement.

In the present embodiment, the storage operation of the sensor 30 is linked with the reverse operation of the main transmission lever 60 in order to prevent the sensor 30 from being damaged when the vehicle is moving backward.
The sensor 30 and the main transmission lever 60 are connected via a wire 50. When the operator shifts the main speed change lever 60 to the reverse position, the tension of the wire 50 is adjusted via an appropriate link mechanism connected to the main speed change lever 60, and the sensor 30 swings upward with the swing shaft 43 as a fulcrum. Moved. As long as the main transmission lever 60 is in the reverse position, the tension of the wire 50 is maintained and the sensor 30 is held upward.

In this way, the sensor 30 is swung upward in conjunction with the reverse operation of the operator, so that it is possible to prevent the tip portion of the detection unit 31 from penetrating into the soil of the field and damaging when the machine body reverses. In addition, in conjunction with the reverse operation of the operator, the sensor 30 is housed upward when the aircraft is actually moved backward. Therefore, it is possible to suppress the penetration of the field into the soil due to the storage delay of the sensor 30.
Further, when the storing operation of the sensor 30 is interlocked with the operation of the main transmission lever 60, if the main transmission lever 60 is set to the reverse position, the traveling mode of the rice transplanter 1 is switched to the reverse movement and the sensor 30 can be stored separately. This eliminates the need for operation and improves operability.

Similarly, the storage operation of the sensor 30 can be linked to the operation of the planting lift lever.
The planting elevating lever is configured to operate an elevating cylinder included in the elevating unit 5 that elevates the planting unit 4, and the planting elevating lever is moved along a guide groove formed in the steering column. When operated, it can be switched to each operation such as raising the planting unit 4, lowering the planting unit 4, starting planting, and stopping planting.

  When the storing operation of the sensor 30 and the raising operation of the planting unit 4 by the planting lift lever are linked, the sensor 30 is swung upward by the lifting operation of the planting lift lever. It is possible to suppress a collision with an appropriate portion of the attachment portion 4.

  In addition, the lever for operating other operations such as the main transmission lever 60 and the planting lift lever and the lever 51 for storing operation of the sensor 30 coexist, and either one of these levers is operated. The sensor 30 may be housed. However, in that case, it is preferable that the planting return operation (release of storage of the sensor 30) by a lever for operating other operations such as the main transmission lever 60 and the planting lift lever is prioritized over the storage release operation of the lever 51.

  In the above configuration, when the storing operation of the sensor 30 is interlocked with the operation tools such as the main transmission lever 60, the planting lift lever, and the lever 51, the wire 50 is used. However, the above configuration is not necessarily employed. There is no need. A case where the storing operation of the sensor 30 is interlocked with the reverse operation of the main transmission lever 60 will be described below as an example.

As shown in FIG. 7, a micro switch 70, a control circuit 71, and a clutch motor 72 are provided as a structure that links the storing operation of the sensor 30 and the reverse operation of the main transmission lever 60.
The micro switch 70 is provided so as to come into contact when the main transmission lever 60 is moved to the reverse position. When the main transmission lever 60 is moved to the reverse position, the detection signal of the micro switch 70 is input to the control circuit 71, and the control circuit 71 applies the clutch motor 72 provided on the swing shaft 43 based on the detection signal. By transmitting the control signal, the sensor 30 is swung upward by the power of the clutch motor 72. Details are as follows.

By setting the main transmission lever 60 to the reverse position, the micro switch 70 is turned on, and a detection signal is input to the control circuit 71. Based on the detection signal, the control circuit 71 transmits a control signal to the clutch motor 72 to operate the clutch motor 72.
The clutch motor 72 is actuated by a clutch connection signal from the control circuit 71, its output shaft is connected to the swing shaft 43, and the output from the clutch motor 72 is further applied to the swing shaft 43 by an operation signal from the control circuit 71. By being transmitted, the sensor 30 is swung upward and stored.
As long as the main transmission lever 60 is in the reverse drive position, the microswitch 70 is maintained in the on state, so that the sensor 30 is held upward.
When the main speed change lever 60 is moved from the reverse position to another operation position, the micro switch 70 is turned off, and the fact that the reverse switch is operated from the reverse position to the release position is input to the control circuit 71 as a detection signal. Then, a control signal is transmitted to the clutch motor 72.
The clutch motor 72 is actuated by a clutch disconnection signal from the control circuit 71, the output shaft thereof is disconnected from the swing shaft 43, and the power from the clutch motor 72 is cut off from the swing shaft 43. Is swingable with respect to the swing shaft 43 and returned to a position where the field surface can be sensed by the detection unit 31.

As shown in FIG. 8, the wire 50 can be connected to the base side of the support column 42 through a long hole 81. A locking projection 82 that can be locked to the lower portion of the elongated hole 81 is formed on the base side of the support column 42, and a motor 83 is provided on the upper portion of the elongated hole 81 via the wire 50.
The elongated hole 81 is disposed at a position that does not hinder the swing of the sensor 30, and the locking projection 82 is configured to be movable in the elongated hole 81 in accordance with the swing of the sensor 30. The long hole 81 is attached to a position where it does not move as the sensor 30 swings so as to be movable up and down. For example, it is attached to the planting frame 15 in the vicinity of the support 42 base side.

  By pulling the wire 50 upward by the motor 83, the elongated hole 81 moves upward. After the locking projection 82 is locked to the lower part of the long hole 81, the sensor 30 is swung upward with the rocking shaft 43 as a rocking fulcrum as the long hole 81 moves upward.

  As described above, since the tension of the wire 50 is not directly applied to the swing shaft 43 and the support column 42 by pulling the sensor 30 upward through the elongated hole 81, the durability of the sensor 30 is unlikely to be impaired. Sensing accuracy can be maintained.

  1: Rice transplanter, 4: Planting part, 5: Lifting part, 12: Planting claw, 14: Float, 15: Planting frame, 20: Leveling device, 30: Sensor, 31: Detection part, 32: Support part , 40: rod, 41: stay, 42: support, 43: swing shaft, 50: wire, 51: lever, 60: main speed change lever

Claims (3)

A rice transplanter equipped with a float for detecting a ground contact surface of a farm,
Provided separately from the float, comprising a sensor for detecting the field surface,
The sensor has a detection unit that follows the surface of the field and a support unit that supports the detection unit in a swingable manner.
A rice transplanter characterized in that it can be held in a state in which the detection portion is swung upward with a rocking shaft included in a support portion of the sensor as a fulcrum.   2. The rice transplanter according to claim 1, wherein the sensor is held in a state of being swung upward with the rocking shaft as a fulcrum when at least the main transmission lever is set to the reverse position. A structure that interlocks the upward swing operation of the sensor and the operation of the main shift lever is configured using a wire,
In conjunction with the reverse operation of the main transmission lever, the tension of the wire is adjusted,
The rice transplanter according to claim 2, wherein the sensor can be held in a state of swinging upward with the swing shaft as a fulcrum.

Images