JP4241332B2 - Paddy field machine - Google Patents

Description

  According to the present invention, a paddy field working device is connected to the rear portion of the traveling machine body so as to be movable up and down, and a plurality of leveling floats arranged in the working machine lateral direction of the working apparatus are connected to the working device at a rear end side of the leveling float. It is provided in a state of being connected to the work device body so as to be swingable up and down around an axis positioned at the position, and is connected to the work device body so as to be movable up and down and urged downward so as to detect the hardness of the field mud. The present invention relates to a paddy field work machine provided with a grounding sensor.

For example, in paddy field direct sowing machines, if the covering material that performs the backfilling treatment of the seeded seeding ditch cannot be adjusted, if the field mud is hard, it is difficult for mud to come back into the sowing ditch and backfilling. When a defect occurs and the field mud is soft, mud flow may occur due to the mud hitting the covering implement. For this reason, a grounding sensor is provided so as to detect the hardness of the field mud, and the function of the covering implement is adjusted based on the detection result of the mud hardness.
Thus, as what provided the grounding sensor, there existed what was conventionally shown by patent document 1, for example.
That is, a swing arm 35 that can swing up and down around a fulcrum c is provided at the front end portion of the support arm 34 that extends forward from the main frame 7, and a disk 36 ( A second sensor S2 using a potentiometer for detecting the vertical position of the disk 36 from the swing of the swing arm 35 is supported by the support arm 34. Equipped with. Since the information from the second sensor S2 indicates the vertical position of the disc 36 with respect to the seeding device 4, the information from the first sensor S1 that detects the ground height of the seeding device 4 and the information from the second sensor S2, The height position of the disk 36 relative to the surface T, that is, the amount of entry of the disk 36 into the surface T can be determined. The larger the amount of entry of the disk into the surface T, the more the surface T is judged to be softer. In some cases, the smaller the amount, the harder the surface T is.

JP 2002-315408 A ([0022], [0026], [0027] columns, FIGS. 2, 4, 6, 8)

  In the conventional paddy field machine, the disc 36 as a grounding sensor is located on the side of one of the leveling floats 22 (c) and 22 of the adjacent leveling floats 22 (c) and the other leveling. The grounding is performed at a position located in front of the float 22, and muddy water flows on both sides of the grounding sensor in different flows due to the influence of the leveling float. In this case, a detection failure may occur due to the influence of a different mud flow such as a pressing force due to the mud flow, and the grounding sensor becomes difficult to move up and down smoothly.

  An object of the present invention is to provide a paddy field work machine that is less likely to cause a detection failure due to mud flow and that is advantageously obtained economically while positioning the grounding sensor and leveling flow as close as possible in the longitudinal direction of the machine body. There is to do.

According to the first aspect of the present invention, a paddy field working device is connected to the rear portion of the traveling machine body so as to be movable up and down, and a plurality of leveling floats arranged in a lateral direction of the machine body of the working apparatus are connected to the working apparatus. Provided in a state of being connected to the work device body so as to be swingable up and down around an axis positioned on the rear end side of the float, and connected to the work device body so as to be movable up and down so as to detect the hardness of the field mud. In the paddy field work machine which is provided with the grounding sensor that is lowered and energized,
A connection member is provided for connecting a pair of adjacent leveling floats of the plurality of leveling floats so as to form an integral structure so as to swing up and down in the same direction, and the ground sensor is connected by the connection member. It arrange | positions so that it may earth | ground between said pair of leveling floats.

  That is, since a pair of adjacent leveling floats are connected to each other by a connecting member to form an integral structure and swing up and down in the same direction, the grounding sensor is grounded between the pair of leveling floats that are an integral structure. The muddy water flows in the same flow condition in the same way on both sides of the grounding sensor and on the other side of the grounding sensor. The effects of mudflow such as pressing force are negligible and close to each other.

Therefore, according to the first aspect of the present invention, the influence of the mudflow received on both sides of the grounding sensor is the same, and the grounding sensor can be smoothly moved up and down regardless of the mudflow effect and can be detected with high accuracy.
Moreover, compared to adopting a single large leveling float corresponding to a pair of leveling floats connected so as to form a unitary structure by a connecting member, a small float can be adopted as each leveling float, or a connected state It can be obtained at low cost by adopting a float with the same shape as other leveling floats that are not present.

  In the second aspect of the present invention, in the configuration of the first aspect of the present invention, the pair of leveling floats connected by the connecting member is a center leveling float that is located inside the working device among the plurality of leveling floats. Detecting means for detecting a swing angle of the pair of leveling floats connected to the connecting member with respect to the work device body, and based on a detection result by the detection means, a detected swing angle by the detecting means is a set swing angle. Control means for raising and lowering the working device with respect to the traveling machine body is provided.

That is, when the ground height of the work device changes due to the traveling machine body tilting back and forth, the swing angle of the pair of ground leveling floats connected to the work device body changes, and this swing angle is the set swing angle. Thus, the working device is controlled to move up and down with respect to the traveling machine body, and the ground height of the working apparatus is maintained at the set height regardless of the front and rear inclination of the traveling machine body.
The change in the ground height of the working device is detected by a leveling float with a large ground contact area in a state where a pair of leveling floats are connected so as to form an integral structure, so even in the case of soft mud The leveling float reacts with high accuracy, swings up and down, and is controlled up and down with high accuracy.

  Therefore, according to the second aspect of the present invention, even if the ground height of the working device changes or in the case of soft mud, it is accurately detected and controlled by a pair of leveling floats, and the working depth is set to the set depth. It can be maintained with high accuracy. In addition, a simple structure can be obtained by combining a pair of ground leveling floats in a connected state for improving the accuracy of the ground sensor and a leveling float for the sensor for increasing the accuracy of the lifting control.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, a pair of left and right steering wheels 1 and a pair of left and right rear wheels 2 are driven by power from an engine 3 to be self-propelled and equipped with a driver's seat. A seeding device 20 is connected to the rear part of the machine body frame 4 of the traveling machine body having a part via a link mechanism 6 with a lift cylinder 5, and power from the engine 3 is transmitted to the seeding device 20 by the rotary shaft 7. It is configured to transmit, and a fertilizer application device 10 having a fertilizer tank 11 is provided at the rear part of the traveling machine body so that rice seed pods are seeded on the paddy field and fertilizer is supplied so as to supply the fertilizer. The machine is configured.

  That is, when the lift cylinder 5 is operated, the lift cylinder 5 swings the link mechanism 6 up and down with respect to the traveling machine body, and the sowing apparatus 20 is lowered and the ground leveling floats 21a and 21b are in contact with the field scene, The leveling floats 21a and 21b are moved up and down to the lifted non-working state in which the ground level floats up from the field scene. A plurality of seeding devices 20 are driven by the driving force from the rotary shaft 7 to take out the seed pods from the seed tank 22 and line up in the horizontal direction in the field mud sowing device by moving the traveling body with the seeding device 20 in the descending operation state. Supply to the location. At the same time, the fertilizer application device 10 is driven by the power from the engine 3 to take out the granular fertilizer from the fertilizer tank 11 and supply it near the side of the seed mud of the field mud. It is.

  As shown in FIGS. 2, 3, 4, etc., the seeding device 20 is connected to a main body frame 31 formed of a square steel pipe along the lateral direction of the seeding device 20, and the main body frame 31 is connected to a plurality of locations in the lateral direction of the seeding device The seeding device body 30 is constituted by the support frames 32, 33, 34, etc. facing the sowing device, and a plurality of the leveling devices attached to the underside of the seeding device body 30 side by side in the lateral direction of the seeding device body 30. Floats 21 a and 21 b, a plurality of feeding mechanisms 23 mounted side by side in the lateral direction of the seeding device body 30 on a mounting frame 38 supported by a support 37 standing upright on the seeding device body 30, and feeding of the plurality of feeding mechanisms 23 One seed tank 22 connected to the upper part of the case is provided, and a seeding hose 24 is connected to one seed delivery port of the feeding case of each feeding mechanism 23. Then, a plurality of grooving and seeding devices 25 connected one by one are arranged in the horizontal direction of the seeding device body 30 and two are placed on each leveling float 21a and 21b. The cover covering tool 26 arrange | positioned so that it may be located in the back of each grooving seeder 25 may be attached to the bottom side of the leveling floats 21a and 21b.

  The feeding case of each feeding mechanism 23 is provided with two seed delivery ports, and each feeding mechanism 23 is driven by two feeding rolls (not shown) in the feeding case so as to be freely rotatable. The seed pods are separately fed to the two seed outlets, and each feeding mechanism 23 supplies seeds to the two grooving seeders 25.

Thereby, the sowing apparatus 30 performs sowing work as follows.
That is, the driving force from the rotating shaft 7 is transmitted to one rotating drive shaft 42 that faces the seeding device common to each feeding mechanism 23 by a transmission mechanism 41 using a crank mechanism and an interlocking rod 40 as shown in FIG. Thus, the feeding roll of each feeding mechanism 23 is driven, and the seed pod of the seed tank 22 is fed from the seed tank 22 by a set amount determined by the feeding recess of the peripheral surface of the feeding roll by the feeding roll of the feeding mechanism 23. To the sowing hose 24, and the soaking grooves 25 soaked in the field mud soil after the leveling floats 21 a, 21 b are leveled by the respective grooving seeders 25, and the soot from the sowing hose 24 is supplied to the sowing grooves. Then, the mud soil is scraped from the lateral side to the sowing groove after supplying the seed pod by the covering tool 26 to refill the sowing groove.

  As shown in FIG. 3, an attachment member 43 fixed to the upper surface side of the rear part of each of the leveling floats 21 a and 21 b is rotatably connected to the end of the support frame 33 of the seeding device body 30. As shown in FIG. 5, among the plurality of leveling floats 21 a and 21 b, a pair of center leveling that is located on the inner side of the seeding device body and adjacent to the side leveling float 21 a located on the outermost side on both sides. The floats 21b and 21b are connected so as to form an integrated structure by a connecting member 44 that connects the upper surface sides of the front end sides of the center leveling floats 21b. The left and right side leveling floats 21a are connected to the leveling floats 21a. Each of the center leveling floats 21b swings up and down with respect to the seeding device body 30 around the axis X located on the rear end side, and the pair of center leveling floats 21b are positioned on the rear end side of the leveling float 21b and side leveling floats 21a. Oscillates up and down in the same direction integrally with the seeding device body 30 around the same axis X as the oscillation axis X of the DOO 21a and the center leveling float 21b is vertically swung individually.

  As shown in FIGS. 6 and 7, the lower end side of the swing restricting link 46 is connected to both ends of the connecting member 44 with respect to each of the connecting support shafts 45 by a connecting cylinder 46a so as to be rotatable relative to each other. A stopper pin 48 configured to enter into a long hole 47 positioned on the upper end side of the restriction link 46 so as to be relatively rotatable and relatively slidable is fixed to the support frames 32 and 34 of the seeding device body 30. The movement regulating link 46 moves up and down together with the front end side of the center leveling float 21b and contacts the stopper pin 48 at the lower end side and upper end side of the long hole 46. The front end side of the center leveling float 21b It moves up and down within a set stroke determined by the length of 47.

  As shown in FIGS. 6 and 7, in each of the swing restriction links 46, one end side is connected to a portion located on the upper end side of the long hole 47 of the swing restriction link 46, and the expansion / contraction adjustment tool 50 is in the middle. The other end side of the load cable 51 having a load is connected to the other end side of the load spring 53 that is connected to the spring support arm 52 of the support column 39 standing on the seeding device body 30. Is wound so that the stopper pin 48 and the support frames 32 and 34 are moved and guided by a guide roller 54 that is rotatably supported. When the front end side of the center leveling float 21b rises and swings, the connecting member 44 that rises together with the float front end side raises the swing restriction link 46 along the stopper pin 48 via the support shaft 45, and the swing restriction link 46 Is configured to be elastically deformed by pulling the load spring 53 via the load cable 51. As a result, an upward load is applied by the load spring 53 to the center leveling float 21b that swings to the side where the float front end rises.

As shown in FIG. 9, the seeding device body 30 includes a detection means 60 composed of a rotary potentiometer in which a rotary operation shaft 60 a is connected to the one support shaft 45 connected to the connection member 44 via a link mechanism 56. The main body frame 31 is attached. The link mechanism 56 includes a link end 57 of the machine body that is composed of a bent end portion of the member constituting the support shaft 45 and a sheet metal member connected to the upper end side of the bent end portion, and the link link 57. The swinging arm 58 is connected to the free end side so as to be relatively rotatable, and the base end side is connected to the rotation operation shaft 60a of the detecting means 60 so as to be integrally rotatable. When the front end side of 21b swings up and down, the connecting member 44 moves up and down together with the float front end side and moves the interlocking link 57 up and down via the support shaft 45, and this interlocking link 57 swings the swinging arm 58 and detects it. The means 60 is operated.

  That is, when the ground height of the seeding device 20 changes, the ground reaction force acting on the front end side of the pair of center leveling floats 21b, 21b changes, and the pair of center leveling floats 21b, 21b are integrated into the seeding device body 30. On the other hand, if the vertical swing angle of the center leveling float 21b with respect to the seeding device body 30 is detected in the same direction, the ground height of the seeding device 20 can be detected based on the detected swing angle. it can. Accordingly, the ground height of the seeding device 20 can be detected using the pair of center leveling floats 21b as sensor floats.

  As shown in FIGS. 6 and 8, a return spring 64 is connected to one end side of an operation arm 63 that is connected to an end portion of the rotary support shaft 26a of each covering tool 26 located on the top surface of the leveling float so as to be rotatable together. The cable operation arm 66 connected to the other end side of the inner cable 65a of the operation cable 63 connected to the other end side of the operation arm 63 of each covering tool 26 is connected to the other end side of the inner cable 65a. As shown in FIG. 11, it is connected to the rotary support shaft 67 so as to be integrally rotatable, as shown in FIG. An electric earth covering motor 69 in which the output gear 69 a is engaged with the sector gear 68 is supported on the main body frame 31 of the seeding device body 30.

As a result, when the soil covering motor 69 is driven, the output gear 69a of the soil covering motor 69 rotates the rotary support shaft 67 via the sector gear 68 to swing all the cable operating arms 66. 65, the inner cable 65a is pulled or loosened, and each operating arm 63 is operated to swing by the pulling force of the inner cable 65a or the restoring force of the return spring 64, so that the covering tool 26 is a vertical axis of the rotary support shaft 26a. Swing around the core Y.
That is, the covering motor 26 is adjusted by the soil covering motor 69 to the covering position for the hard mud so that the free end approaches the seeding groove by the grooving seeder 25 and the hard mud is easily scraped to the seeding groove. It is possible to adjust to a soil covering position for soft mud that rakes the mud into the sowing groove in a state where the free end side of the soil is separated from the sowing groove by the grooving seeder 25 and hardly resists mud flow.

  As shown in FIG. 2, a mud hardness detection mechanism 70 including a grounding sensor 71 formed of a rotating wheel is provided at the front portion of the seeding device 20.

  As shown in FIGS. 2, 5, and 10, the mud hardness detection mechanism 70 is loosely attached to the extended end portion of the sensor arm 72 that extends backward from the front end portion of the support arm 32 of the seeding device body 30 toward the rearing device. A potentiometer provided on a bracket 73 fixed to the support arm 32 and the grounding sensor 71 which is mounted so as to be freely rotatable and disposed so that the lower end side contacts the field mud between the front end portions of the pair of center leveling floats 21b and 21b. 74, a pivot arm 75 that is connected to the rotation operation shaft of the potentiometer 74 so that the base end thereof is integrally rotatable, and that operates the potentiometer 74 is provided with an interlocking rod 76 that interlocks with the sensor arm 72. is there.

  The sensor arm 72 is connected to the support arm 32 so as to swing up and down about the axis P, and the ground sensor 71 and the weight of the sensor arm 72 are biased downward. Even if the ground height of the seeding device 20 changes, the sensor arm 72 moves around the axis P with respect to the support arm 32 due to the ground reaction force acting on the ground sensor 71 and the downward bias of the ground sensor 71. The grounding sensor 71 always touches the field mud. When the ground sensor 71 moves up and down with respect to the support arm 32, the sensor arm 72 swings up and down with respect to the support arm 32, and the sensor arm 72 is interlocked with the swing arm 75 by the interlocking rod 76. As a result, the potentiometer 74 is activated. Thereby, the potentiometer 74 detects the attachment height with respect to the seeding device body 30 of the ground sensor 71, and outputs this detection result as an electrical signal.

  That is, depending on the detection information by the potentiometer 74, the vertical position of the ground sensor 71 with respect to the seeding device 20 can be obtained, and depending on the detection information by the detection means 60 that detects the swing angle of the center leveling float 21b, the seeding device 20 can be obtained. The height position of the ground sensor 71 with respect to the field scene T based on the detection information by the potentiometer 74 and the detection information by the detection means 60, in other words, the field scene T of the ground sensor 71. The penetration depth can be detected, and the hardness of the field mud can be detected based on the detection result. That is, it can be determined that the field mud is softer as the depth of entry of the ground sensor 71 into the farm scene T is larger, and the field mud is smaller as the depth of penetration of the ground sensor 71 into the farm scene T is smaller. Can be determined to be hard.

  As shown in FIG. 12, the detection means 60 and the potentiometer 74 are linked to the control means 80, and the control means 80 is linked to the electromagnetic control valve 81 of the lift cylinder 5 and the soil covering motor 69. . The control means 80 is also linked with a seeding depth setting means 82 provided in the operation section, and a swing operation section 83a is interlocked with the rotary support shaft 67 via a swing arm 84 as shown in FIGS. Also, a soil covering sensor 83 comprising a potentiometer that detects the mounting posture of the earth covering tool 26 based on the rotational position of the rotation support shaft 67 is also linked.

  The seeding depth setting means 82 is composed of a potentiometer, a touch panel using liquid crystal, and the like. The seeding device body of the center leveling float 21b has a seeding depth to be maintained by raising / lowering control of the seeding device 20 by operating the operation unit. The swing angle with respect to 30 is set to be freely changeable, and this set swing angle is output as an electrical signal to the control means 80.

The control means 80 is configured using a microcomputer, and outputs a predetermined operation signal to the electromagnetic control valve 81 on the basis of information detected by the detection means 60, thereby switching the electromagnetic control valve 81, The lift cylinder 5 is operated so that the detection angle by the detection means 60 becomes the set swing angle by the seeding depth setting means 82. That is, the raising / lowering control for raising / lowering the seeding apparatus 20 with respect to the traveling machine body is performed so that the detection angle by the detection means 60 becomes the set swing angle by the seeding depth setting means 82.
Further, the control means 80 detects the hardness of the field mud based on the detection information by the detection means 60 and the potentiometer 74, and detects the attitude of the covering tool 26 based on the detection information by the soil covering sensor 83 based on this detection result. However, a predetermined operation signal is output to the soil covering motor 69 and the soil covering motor 69 is operated to control the posture so that each covering tool 26 is attached according to the detected mud hardness.

Thus, when the control means 80 is turned on and the work is performed, the seeding device 20 by the control means 80 based on the detection information by the detection means 60 and the setting information by the sowing depth setting means 82 even if the traveling machine body tilts back and forth. The sowing apparatus 20 is maintained at a ground height corresponding to the set sowing depth by the lifting control of the sowing so that the sowing depth by the sowing apparatus 20 is equal to or substantially equal to the set sowing depth set by the sowing depth setting means 82. While sowing.
Moreover, even if the hardness of the field mud changes, each covering tool 26 is brought into an attachment posture corresponding to the mud hardness by controlling the posture of the covering tool 26 by the control means 80 based on the detection information by the ground sensor 71 and the detecting means 60. The seeding operation can be performed while preventing the backfilling failure of the seeding groove formed by the grooving seeder 25 from being adjusted and preventing the turbulent mud flow caused by the covering tool 26 from being generated easily.

  As shown in FIG. 7, the spring support arm 52 that supports the load spring 53 extends from the rotation support shaft 67 that is rotated by the soil covering motor 69 so as to be integrally rotatable. That is, when the earth covering motor 69 is operated by the control means 80 to adjust the posture of the earth covering tool 26, the spring support arm 52 is also swung to adjust the urging force of the load spring 53, whereby the center leveling float 21b. The sensitivity is adjusted together. The harder the mud, the stronger the biasing force of the load spring 53 and the less sensitive the center leveling float 21b. The softer the mud, the weaker the biasing force of the load spring 53 and the center leveling float 21b. Adjust the sensitivity to be sensitive.

  As shown in FIG. 1, the fertilizer application device 10 drives a plurality of feeding mechanisms 12 connected to a lower portion of a fertilizer tank 11 by a driving force taken out from a rear wheel transmission shaft, and each feeding mechanism 12 uses the fertilizer. The fertilizer is fed out from the tank 11, and the fed fertilizer is fed into the fertilizer hose 14 by the fertilizer conveying wind from the electric blower 13, and is disposed so as to be positioned two by one on the leveling floats 21a and 21b, to the leveling floats 21a and 21b. A fertilizer groove is formed in the field mud on the lateral side of the grooving seeder 25 by the attached grooving fertilizer 15, and fertilizer from the fertilizer hose 14 is supplied to the fertilizing groove. .

[Another embodiment]
The present invention can be applied to a rice transplanter, etc. in addition to a paddy direct sowing machine. These paddy direct sowing machine, rice transplanter, and the like are collectively referred to as a paddy field work machine, and the sowing apparatus 20 and the seedling planting apparatus are collectively referred to. This is referred to as a work device 20.

Overall side view of riding paddy direct sowing machine with fertilizer Side view of the entire seeding device Plan view showing the arrangement of leveling float Rear view of seeding device Top view of mud hardness detection mechanism Rear view showing the location of the center leveling float Side view showing mounting structure of center leveling float The perspective view which shows the adjustment structure of a covering implement Side view of detection means arrangement Side view of mud hardness detection mechanism Side view of sector gear placement Block Diagram

Explanation of symbols

20 Working devices 21a and 21b Leveling float 30 Working device body 44 Connecting member 60 Detection means 71 Grounding sensor 80 Control means X Swing axis of leveling float

Claims (2)

A working device for paddy fields is connected to the rear part of the traveling machine body so as to be movable up and down, and a plurality of leveling floats arranged in the lateral direction of the machine body of the working apparatus are connected to the working apparatus on the rear end side of the leveling float. Provided in a state where it is connected to the work device body so that it can swing up and down around the core, and is provided with a grounding sensor which is connected to the work device body so as to be able to move up and down and urged downward so as to detect the hardness of the field mud. A paddy field machine,
Providing a connecting member for connecting a pair of adjacent leveling floats of the plurality of leveling floats so as to swing up and down in the same direction as an integral structure;
A paddy field work machine in which the grounding sensor is arranged to be grounded between the pair of leveling floats connected by the connecting member.   The pair of leveling floats connected by the connecting member is a center leveling float located inside the working device among the plurality of leveling floats, and the working device body of the pair of leveling floats connected by the connecting member Based on the detection result by the detection means, the working device is controlled to be moved up and down with respect to the traveling machine body so that the detected swing angle by the detection means becomes a set swing angle. The paddy field work machine according to claim 1, wherein a control means is provided.

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