JP4909121B2 - Paddy field machine - Google Patents

Description

  The present invention relates to a paddy field work machine in which paddy field work devices such as a seedling planting device, a paddy field direct seeding device, and a paddy field weeding device are connected to a rear part of a traveling machine body so as to be movable up and down.

In a rice transplanter, which is a typical paddy field work machine, mud scattered backward by a rear wheel during traveling in a paddy field often deposits and accumulates on a seedling planting device. Therefore, for example, as shown in Patent Document 1, a mudguard cover is provided above the front part of the leveling float located immediately after the rear wheel to prevent mud from adhering to the leveling float, It is known that the construction is made so as to avoid undesirably sinking due to the weight of mud on which the leveling float adheres and accumulates and the mud pushing on the paddy surface increases.
JP-A-8-308334

  The above structure can prevent mud from accumulating on the leveling float located just behind the rear wheel, but depending on the soil and running speed, mud may spread widely upwards beyond the mudguard cover, and seedling planting It may adhere to each part facing the front of the machine body in the apparatus, mud adheres to the sliding part and wear is accelerated, or the operating resistance increases and the driving load tends to increase. In addition, since mud adheres to the details of the seedling planting device, it requires a lot of labor and time for cleaning after the planting operation.

  If mud adheres to and accumulates on each part of the seedling planting device and the weight of the entire seedling planting device increases, the speed when the seedling planting device is lifted tends to decrease, and the height of the seedling planting device relative to the rice field is detected. When performing automatic elevation control, the responsiveness of the ascending control operation decreases.

  This invention was made paying attention to such a point, Comprising: For the purpose of preventing that the mud scattered widely back and forth by the rear wheel adheres to each part of the paddy field work device. Yes.

A first invention is a paddy field work machine in which a paddy field work device is connected to a rear part of a traveling machine body through a lift link mechanism so as to be movable up and down.
The rear end of the rear wheel fender that covers the rear wheel of the traveling machine body from above is extended downward, and the rear end of the rear wheel fender is moved in the same direction as the up and down direction of the paddy field work device in conjunction with the up and down movement of the paddy field work device. It is configured to move up and down in the direction.

  According to the above configuration, even if the mud is scattered largely upwards depending on the conditions such as soil quality and traveling speed, the mud is received by the large rear wheel fenders up and down, and adhesion to each part of the paddy field work apparatus is suppressed. Since the rear wheel fender is generally tilted forward and tilted, mud adhering to the front surface of the rear wheel fender is likely to fall by its own weight, and a large amount of mud is prevented from adhering to and accumulating on the rear wheel fender.

  When the traveling machine body sinks, lifts or tilts back and forth due to the unevenness of the cultivator in the paddy field, the paddy field work device moves up and down relative to the surface of the paddy field to automatically or manually control the paddy field work device with respect to the surface. Therefore, the rear end of the rear wheel fender is moved up and down in the same direction in conjunction with the raising and lowering of the paddy field work device. For example, even if the paddy field work device is raised with respect to the traveling body in a paddy field with a deep cultivator, the rear end of the rear wheel fender is also raised accordingly, so that the rear end of the rear wheel fender enters the paddy surface and makes it rough. This is avoided. Even if the paddy field work device is lowered with respect to the traveling machine body in the shallow paddy field, the rear end of the rear wheel fender is also lowered accordingly, and the distance between the rear end of the rear wheel fender and the paddy surface is increased, Mud from the rear wheels is prevented from diving behind the rear end of the rear fender.

Therefore, according to the first invention, it is possible to prevent mud scattered widely in the vertical direction toward the rear by the rear wheel from adhering to and accumulating on each part of the paddy field work device, and mud adheres to the sliding part and the like. It is possible to prevent the wear from being accelerated or the operating resistance to increase and the driving load to increase. In addition, mud does not adhere to the details of the paddy field work device, and cleaning after work is also possible. It becomes easy.
Even if the paddy field work device is raised and lowered according to the ups and downs of the traveling machine body and the front and back inclination, the distance fluctuation between the rear end of the rear wheel fender and the paddy surface can be reduced, and the good mudguard function by the rear wheel fender can be exhibited. .

According to a second invention, in the first invention,
The rear end of the rear wheel fender is connected to the paddy field work device.

  According to the above configuration, the rear end of the rear wheel fender can be moved by the same amount as the lifting / lowering amount of the paddy field work apparatus, and the first invention can be suitably implemented as a simple structure.

According to a third invention, in the first invention,
The rear wheel fender is linked to the lifting link mechanism.

  According to the above configuration, when the lifting link mechanism is operated for lifting the paddy field working device, the rear end of the rear wheel fender can be moved in conjunction with this, and a different paddy field working device is attached to the rear end of the lifting link mechanism. Even if they are replaced and connected, the desired mudguard function can be suitably exhibited.

A fourth invention is the invention according to any one of the first to third inventions,
The rear wheel fender is constituted by a fender body fixed to the traveling machine body and a rear extension fender attached to the fender body so as to be slidable and extendable.

  According to the above configuration, the fender body and the rear extension fender do not have to be elastically deformable, so the rear extension fender can be used with a high strength material such as a metal material or hard resin, and has excellent durability. A mudguard structure can be constructed.

According to a fifth invention, in any one of the first to third inventions,
The rear wheel fender includes a fender body fixed to the traveling machine body and a rear extension fender that is elastically stretchable.

  According to the said structure, rubber | gum and a soft resin material can be used for a rear part extension fender, the scattered mud can be received with little rebound, and a mudguard structure with little scattering can be comprised.

A sixth invention is the invention according to any one of the first to fifth inventions,
The rear wheel fender includes a fender main body fixed to the traveling machine body and a rear extension fender connected to the fender main body so as to be capable of rolling.

  According to the above configuration, even if the traveling body tilts to the left and right and the rear end of the rear extension fender contacts the surface, either the left or right end of the rear end of the rear extension fender rolls on the surface. It is possible to prevent deep rushing and breaking.

  The rice transplanter which is an example of the paddy field machine concerning this invention is shown by FIG. This rice transplanter is configured in a six-row planting specification, and includes a parallel four driven by a hydraulic cylinder 4 at a rear portion of a traveling machine body 3 that includes a front wheel 1 and a rear wheel 2 and is configured as a four-wheel drive type. A lifting link mechanism 5 having a continuous link structure is provided, and a seedling planting device 6 as a paddy field working device is connected and supported in a freely rolling manner around the fulcrum p in the front-rear direction at the lower rear end of the lifting link mechanism 5. It has the structure where the fertilizer 7 is mounted in the rear part.

  As shown in FIGS. 2 to 4, the seedling planting device 6 includes a seedling base 8 on which six mats of matted seedlings are placed and reciprocally moved by a fixed stroke, from the lower end of the seedling base 8. Six sets of rotary planting mechanisms 9 that cut out seedlings for one stock and plant them on the rice field T, three leveling floats 10 arranged side by side so as to level the planting location of the rice field T, and the next A pair of left and right markers 11 that form a travel reference line of the stroke on the surface T are provided.

  The three leveling floats 10 arranged in parallel on the left and right are supported so as to be able to swing up and down around the rear fulcrum b, and the center leveling float 10 extends forward from the left and right leveling floats 10 so that the surface T It is used as a sensor float SF that detects the height of the seedling planting device 6 with respect to. The front part of the sensor float SF and a rotary potentiometer (not shown) arranged at a fixed position at a proper position of the seedling planting device 6 are linked to each other, and the swing angle around the rear fulcrum b of the sensor float SF is electrically changed. The hydraulic cylinder 4 is controlled to be detected and the detected value is within the set reference range. Thus, automatic elevation control (automatic planting depth control) for stabilizing the planting depth is performed.

  The seedling planting device 6 is provided with a rectangular tube-shaped planting frame 12 made of an aluminum extrusion molding material at the front lower portion, and this planting frame 12 is connected and supported to the lower rear end portion of the elevating link mechanism 5 so as to be capable of rolling. ing. A feed case 13 that receives power from the traveling machine body 3 is connected to the left and right center of the planting frame 12, and a planting case 14 is connected to the left and right three locations on the rear surface of the planting frame 12 in a cantilevered manner. The planting mechanisms 9 are mounted on the left and right ends of the planting drive shaft 15 that is penetrating and horizontally mounted on the rear end portion of the case 14.

  The planting mechanism 9 is connected and fixed to the end of the planting drive shaft 15 and rotates together with the planting drive shaft 15. The planting mechanism 9 can rotate around the horizontal axis on the lateral outer sides of both ends of the rotation case 16. A claw case 17 pivotally supported on the claw case 17 is provided, and each claw case 17 is provided with a planting claw 18 and a seedling pusher 19.

  In conjunction with the rotation of the rotating case 16 at a constant speed in the forward rotation direction (counterclockwise in FIG. 3) by the planting drive shaft 15, an inconstant speed gear transmission in which the claw case 17 is housed in the rotating case 16. By a mechanism (not shown), it is rotated once in a reverse direction at an inconstant speed, so that the planting claw 18 has a vertically long tip rotation trajectory S that extends between the seedling outlet at the lower end of the seedling platform 8 and the rice field T. It is designed to circulate and draw. When the planting claw 18 brings the seedling cut out and held from the lower end of the seedling table 8 into the surface T, the seedling pushing tool 19 protrudes toward the toe side, separates the held seedling from the planting claw 18 and pushes it into the ground. It is configured to

  As shown in FIG. 4, a slide rail 21 that horizontally receives and supports the lower end portion of the seedling support base 8 is slid horizontally at an upper portion of the planting case 14. The slide rail 21 is supported via a guide rod 22 so as to be displaceable in the inclination direction of the seedling table 8, and the position of the slide rail 21 is adjusted so that the seedling table 8 is rotated around the tip of the planting claw 18. It is possible to change and adjust the amount of seedling removal by the planting claws 18 by moving the seedling table up and down with respect to the movement trajectory S. For adjusting the position of the slide rail 21, an adjustment lever 23 for adjusting the amount of seedling removal that is swing-operated around the fulcrum a is used, and the lever guide 24 provided on the planting frame 12 includes the adjustment lever 23 that is swing-adjusted. By engaging with the notch 25, the slide rail 21 is fixedly held at an arbitrary adjustment position.

  A float fulcrum shaft 26 is disposed horizontally and horizontally below the front portion of the planting case 14, and the leveling float 10 is provided at the rear end of the three sets of float support arms 27 projecting rearward from the float fulcrum shaft 26. It is connected and supported around the fulcrum b so that it can swing up and down. The float support arm 27 that can swing about the fulcrum c integrally with the float fulcrum shaft 26 is swing-operated by an adjustment lever 28 for changing the planting depth extending forward and upward from the float fulcrum shaft 26. By moving the float support arm 27 upward, the tip rotation trajectory S of the planting claw 18 is lowered with respect to the surface T, and the planting depth is deepened, and the float support arm 27 is moved downward. The tip rotation trajectory S rises with respect to the surface T and the planting depth becomes shallow. The adjustment lever 28 can be fixedly held at an arbitrary adjustment position by being engaged with the notch 29 of the lever guide 24.

  The work power taken out from the traveling machine body 3 is transmitted to the feed case 13 via the telescopic transmission shaft 30, and the seedling table 8 is laterally driven by the power transmitted to the feed case 13. At each stroke end, the seedling feed belt 37 provided on the seedling table 8 is driven at a constant pitch. A part of the power transmitted to the feed case 13 is taken out from the lateral transmission shaft 31 and transmitted to the proximal ends of the planting cases 14 arranged in parallel.

  As shown in FIG. 2, support columns 32 are erected from the left and right sides of the planting frame 14, and guide rollers 34 are provided at a plurality of left and right positions of a horizontal frame 33 that is installed and fixed over the support columns 32. Is engaged with a guide frame 35 that is horizontally connected to the upper rear surface of the seedling platform 8, and the upper portion of the seedling platform 8 that is maintained in the forward tilted posture is received and supported so as to be movable left and right and vertically movable.

  A rolling drive device 40 is provided above the rear end of the lift link mechanism 5. A buffer spring 42 is installed between the operation wire 41 led out from the rolling drive device 40 to the left and right lateral sides and the left and right portions of the horizontal frame 33, and the left and right operation wires 41 are put in and out by the electric motor 43. By operating, the whole seedling planting device 6 is driven to swing around the fulcrum p in the front-rear direction. The rolling drive device 40 is linked to an inclination sensor (not shown) that detects the right / left inclination of the seedling planting device 6. Then, this is detected by the tilt sensor, the operation of the electric motor 43 is controlled, and the seedling planting device 6 is controlled to return to the horizontal horizontal posture. A buffer spring 42 is provided between the rolling drive device 40 and the seedling planting device 6, and the seedling planting device 6 can be freely rolled while deforming the buffer spring 42 even when the rolling drive device 40 is in a non-operational state. It is possible, and even if the traveling machine body 3 is tilted slightly to the left and right, the seedling planting device 6 follows the ground surface T.

  A balance spring 36 is stretched across the upper part of the rear end of the lifting link mechanism 5 and the left and right portions of the guide frame 35 on the back of the seedling platform. When the seedling table 8 moves laterally, the balance spring 36 opposite to the moving direction is extended, and a rolling force due to the spring tension is applied to the seedling planting device 6, and the weight balance changes due to the lateral movement of the seedling table 8. Thus, the inclination of the seedling planting device 6 is automatically suppressed.

  The main part of the fertilizer application device 7 is mounted on the traveling machine body 3 between the driver seat 20 disposed at the rear of the traveling machine body 3 and the seedling planting device 6, and a fertilizer hopper 46 for storing powdered fertilizer. The rotary feed mechanism 47 for feeding the fertilizer in the fertilizer hopper 46, and the electric blower for wind-feeding the fed fertilizer to the grooving device 49 provided in each leveling float 10 of the seedling planting device 6 through the supply hose 48. 50, and a blower duct 51 that distributes and feeds the conveying air from the electric blower 50 to three feeding mechanisms 47 arranged in parallel in units of two strips.

  The marker 11 is mounted on the left and right ends of the planting frame 12 so as to be able to swing up and down, and is supported so as to be able to switch between a working posture projecting laterally outward and a stowed storage posture, and an electric motor. The two postures are switched by the forward / reverse rotation operation 44.

  Rear wheel fenders 55 that cover the rear wheel 2 from above and behind are provided on the left and right sides of the driver seat 20. The rear wheel fender 55 includes a fender body 55A fixed to the traveling machine body 3 and a pair of left and right rear extension fenders 55B connected to the rear end of the rear wheel fender 55 and extending rearward and downward.

  The fender body 55A is formed of a sheet metal material or a hard resin material, while the rear extension fender 55B is formed of a sheet material made of rubber or soft resin so as to be bent and deformed. The lower end portion of 55B is connected and fixed to the front surface of the planting frame 12 in the seedling planting device 6. The rear extension fender 55B is wide and is configured so that its lower end is close to the field surface T. The mud splashed rearward from the rear wheel 2 is widely received and adhered to the front surface of the seedling planting device 6 or left and right. Adhesion and deposition on the leveling float 10 is prevented.

  Since the lower end of the rear extension fender 55B configured in this manner moves up and down in conjunction with the raising and lowering of the seedling planting device 6, the entire traveling machine body 3 sinks or the rear wheel 2 is plowed in a deep part of the cultivator. In the case where the traveling machine body 3 falls back into the recess of the board and tilts downward, etc., the seedling planting device 6 is automatically raised to a height that provides a predetermined planting depth, so that the rear extension fender 55B The rear end is also moved upward by the same amount, so that the rear end of the rear extension fender 55B can be prevented from deeply penetrating into the surface T and being damaged. On the contrary, when the entire traveling machine body 3 is lifted in a shallow part of the cultivator, or when the rear wheel 2 rides on the convex part of the cultivator and the traveling machine body 3 rises rearward and tilts, the seedling planting device 6 is predetermined. The rear end of the rear extension fender 55B is also moved downward by the same amount, and the distance between the rear end of the rear extension fender 55B and the surface T is small. This prevents the mud from the rear wheel 2 from diving behind the rear extension fender 55B from the rear end.

  In addition, if the planting depth is changed by adjusting the leveling float 10 up and down, the distance between the rear end of the rear extension fender 55B and the surface T changes, so the connection position of the rear extension fender 55B with respect to the planting frame 12 is changed. It is desirable to be able to adjust up and down.

[Other Examples]
(1) As shown in FIG. 5, the rear part of the fender body 55A constituting the rear wheel fender 55 is extended in an arc shape centered near the rear wheel axis x, and is bent in an arc shape on the upper surface of the extension part. A plurality of guide rods 56 are slidably mounted side by side so that they can slide, and a sheet-like or rigid plate-like rear extension fender 55B is attached to the rear end of the guide rod 56, and the guide rod 56 is slid. Thus, the rear extension fender 55B can be slid up and down. In this case, the guide rod 56 is projected and urged by a spring 57, and the guide rod 56 and the lift link mechanism 5 are linked by an operation wire 58, and the rear extension fender is interlocked with the lift link mechanism 5 ascending. 55B is pulled up and the rear extension fender 55B is moved downward in conjunction with the lifting link mechanism 5 moving downward, so that the seedling planting device 5 is lifted and lowered according to the variation in the depth of the cultivator. Even so, the rear end of the rear extension fender 55B can be positioned close to the leveling float 10 to exhibit a high mudguard function.

  (2) As shown in FIG. 6, the rear extension fender 55B can be attached to the rear end of the fender main body 55A constituting the rear wheel fender 55 so as to be able to roll around the fulcrum r in the front-rear direction. According to this, even if the traveling body 3 is inclined to the left and right and the left and right ends of the rear end of the rear extension fender 55B are in contact with the surface T, the rear extension fender 55B rolls around the fulcrum r in the front-rear direction. It is possible to prevent any of the left and right ends at the rear end of 55B from deeply penetrating into the field surface T and being damaged.

  The rear extension fender 55B is composed of a hard plate-like support base 55Ba and an elastic elastic rubber mudguard cover 55Bb connected to the rear end of the support base 55Ba, and an arc shape on the upper surface of the support base 55Ba. By mounting a plurality of guide rods 56 bent in a side-by-side manner so as to be slidable, connecting the rear end of the mudguard cover 55Bb to the rear end of the guide rod 56, and sliding the guide rod 56 The mudguard cover 55bb is extended and contracted vertically. The guide rod 56 is projected and urged by a spring 57, and the guide rod 56 and the lift link mechanism 5 are linked by an operation wire 58, and the rear extension fender 55B is moved in conjunction with the lift link mechanism 5 ascending. By constructing the rear end of the rear extension fender 55B to move downward in conjunction with the end being lifted and the elevating link mechanism 5 being lowered, the seedling planting device 6 is adapted to variations in the depth of the cultivator. Even if it is lifted and lowered, the rear end of the rear extension fender 55B can always be positioned close to the leveling float 10 to exhibit a high mudguard function.

Whole side view of rice transplanter Front view of seedling planting device Side view of seedling planting device Side view showing the support structure of the bottom of the leveling float and seedling platform Side view showing a rear wheel fender of another embodiment A side view showing a rear wheel fender of still another embodiment

Explanation of symbols

2 Rear wheel 3 Traveling machine body 5 Elevating link mechanism 6 Paddy field work device (seed planting device)
55 Rear wheel fender 55A Fender body 55B Rear extension fender

Claims (6)

In a paddy field work machine in which a paddy field work device is connected to the rear part of the traveling machine body through a lift link mechanism so as to be lifted and lowered freely,
The rear end of the rear wheel fender that covers the rear wheel of the traveling machine body from above is extended downward, and the rear end of the rear wheel fender is moved in the same direction as the up and down direction of the paddy field work device in conjunction with the up and down movement of the paddy field work device. A paddy field machine configured to move up and down in a direction.   The paddy field machine according to claim 1, wherein a rear end of the rear wheel fender is connected to the paddy field work device.   The paddy field work machine according to claim 1, wherein the rear wheel fender is linked to the lifting link mechanism.   The said rear-wheel fender is comprised with the fender main body fixed to the said traveling body, and the rear part extension fender attached to this fender main body so that sliding expansion / contraction is possible. Paddy field machine.   The paddy field work machine according to any one of claims 1 to 3, wherein the rear wheel fender includes a fender main body fixed to the traveling machine body and a rear extension fender that is elastically stretchable.   The paddy field according to any one of claims 1 to 5, wherein the rear wheel fender includes a fender body fixed to the traveling machine body and a rear extension fender connected to the fender body so as to be able to roll freely. Working machine.

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