JP2008278819A - Paddy field working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paddy field working machine connected with a paddy field implement at the rear part of a traveling body in a freely liftable manner, having a splash board at the back of the rear wheel to surely prevent the adhesion and deposition of mud splashed backward with the rear wheel to various parts of the paddy field implement, and enabling easy attachment and detachment of the splash board to facilitate the maintenance work. <P>SOLUTION: A splash board 55 to receive the mud splashed backward with the rear wheel of a traveling body is placed at the front part of a paddy field implement 6 positioned at the back of the rear wheel, a supporting member 61 is placed on the fixing parts 12, 52 at the side of the paddy field implement 6, and an engaging object 60 capable of laterally moving the splash board 55 is formed in a state engaged with the supporting member. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

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 disposed by tightening the left and right bolts above the front part of the leveling float located immediately after the rear wheel, and mud adheres to and accumulates on the leveling float. It is known that it is configured to prevent the paddy surface from unduly sinking due to the weight of mud on which the leveling float adheres and accumulates, thereby increasing the amount of mud pushing on the paddy surface.
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 in the device, and it tends to cause problems such as mud adhering to the sliding part and accelerated wear, or increased operating resistance and driving load. there were. In addition, since mud adheres to the details of the seedling planting device, it takes a lot of labor and time for cleaning after planting work, and when removing it, it is difficult to attach and detach the bolts on the left and right center side of the aircraft in particular. Also, various adjustments in the seedling planting device were hindered.
Thereby, it is necessary to attach a relatively large mudguard cover to a portion other than the leveling float, and a device for attaching and detaching the mudguard cover is required.

  The present invention has a structure that can be easily attached / detached even if it is a relatively large mudguard cover when it is provided with a relatively large mudguard cover that can effectively remove mud scattered even backwardly by the rear wheel. The purpose is to. At the same time, the wire harness or cable is held on the rear surface of the mudguard cover to prevent the wires from being damaged.

[Configuration of the first invention]
A feature of the first invention is a paddy field work machine in which a paddy field work device is connected to a rear part of the traveling machine body so as to be movable up and down. A mudguard cover for catching mud scattered rearward by a rear wheel of the running machine body is provided in front of the paddy field work apparatus. Engagement part that is provided with a support member that supports the mudguard cover in the fixed part on the paddy field work device side or traveling machine body side, and that can be moved in the horizontal direction by engaging the support member on the mudguard cover side Is the point that formed.

[Action]
When a relatively large mudguard cover is provided in front of the paddy field work device to catch mud scattered backward by the rear wheels of the traveling machine body, for example, the mudguard cover is moved downward from above the traveling machine body to It is conceivable that the mudguard cover is inserted between the paddy field work device and the support member of the fixed portion on the paddy field work device side or the machine body side.
With this configuration, the worker lifts the mudguard cover up above the traveling machine body, and then removes the mudguard while taking care not to catch his / her arms on the rear wheels of the traveling machine body or the top of the paddy field work device. The operation of moving the cover downward and inserting it between the rear wheel of the traveling machine body and the paddy field work apparatus must be performed, which makes it difficult to perform the work.

On the other hand, according to the first invention, the operator moves the mudguard cover to the inner side of the traveling machine body after positioning the mudguard cover laterally outside the traveling machine body, and works on the rear wheels and paddy fields of the traveling machine body. Insert the mudguard cover into the inner side of the traveling machine body while engaging the engaged part of the mudguard cover with the support member on the paddy field work machine side or the machine body side. To move it to a predetermined position.
As described above, according to the first aspect of the present invention, the operator does not need to lift the mudguard cover greatly above the traveling machine body, so that the mudguard cover can be handled easily. When the mudguard cover is moved inward of the traveling machine body and inserted from the lateral side between the rear wheel of the traveling machine body and the paddy field work device, the worker can move laterally from the rear wheel of the traveling machine body or the paddy field work device. Therefore, it is not necessary to pay attention so that the operator's own arm or the like is not caught on the rear wheel of the traveling machine body or the paddy field work device.
For example, a grooved pin is used as the supporting member, a hole having a sufficiently larger inner diameter than the large-diameter portion of the pin is used as the engaged member, and the outer diameter of the grooved pin is wider than the pin outer diameter of the grooved portion of the grooved pin. A dharma hole in which a horizontally long hole having a narrower dimension than the large diameter part is formed can be employed.
Further, for example, as a support member and an engaged portion, one is a horizontally long rail using an I-shaped, L-shaped or T-shaped flat plate, an L-shaped member, or a T-shaped member in a side view, and the other is It can also be an insertion guide rail that fits into it.

〔The invention's effect〕
Therefore, according to the first invention, in the paddy field working machine, when a relatively large mudguard cover for catching mud scattered rearward by the rear wheel of the traveling machine body is provided in front of the paddy field working device, the mudguard cover can be handled easily. By the point that it is possible, and there is less need to be careful not to catch the arm of the worker himself to the rear wheel of the traveling machine and the paddy field work device,
The workability of attaching and detaching the mudguard cover was improved.

[Configuration of the second invention]
The feature of the second invention resides in that in the first invention, there is provided a fixing means for fixing the mudguard cover to the fixing part on the paddy field work apparatus side or the traveling machine body side with the engaged part engaged with the support member. .

[Action]
According to the second invention, all the functions of the first invention can be achieved, and the mudguard cover can be fixed to the fixed part of the paddy field work apparatus (or the machine body) in a state where the mudguard cover is positioned by the fixing means. Can be suppressed.

〔The invention's effect〕
Therefore, according to the second aspect of the present invention, the mudguard cover is fixed in a state where it is positioned at a predetermined position, so that it can be used in a stable state with no play.

[Configuration of the third invention]
A feature of the third invention resides in that, in the second invention, the fixing means is provided only on the outer side portion of the paddy field work device in the mudguard cover.

[Action]
According to the third invention, all the effects of the second invention can be achieved, and the fixing means is provided only on the outer side of the paddy field work device in the mudguard cover. Even without inserting a hand in the back, the fixing means can be easily fixed and released at hand.

[Effect of the third invention]
Therefore, according to the third aspect of the present invention, the fixing means can be easily fixed and released at hand without extending the hand, and the workability of fixing and releasing the mudguard cover can be improved. It was.

[Configuration of the fourth invention]
The feature of the fourth invention is that, in the second or third invention, the fixing means is a toggle type fastening bracket.

[Action]
According to the fourth invention, all the effects of the second or third invention can be achieved, and the mudguard cover can be easily fixed and released by operating the toggle type fastening bracket.

[Effect of the fourth invention]
Therefore, according to the fourth aspect of the present invention, the mudguard cover can be easily fixed and released by the toggle type fastening bracket, and the workability of fixing and releasing the mudguard cover can be improved.

[Configuration of the fifth invention]
The feature of the fifth invention is that, in any one of the first to fourth inventions, the mudguard cover is arranged from the lower part of the paddy field work device to at least a place above the rear wheel shaft center. .

[Action]
According to the fifth invention, even if the mud seems to scatter upward due to conditions such as soil quality and traveling speed, mud is received by the large mudguard covers on the top and bottom, and mud adhesion to each part of the paddy field work device is suppressed. Is done.

〔The invention's effect〕
Therefore, according to the fifth aspect of the present invention, it is possible to prevent inconveniences such as the mud being scattered to the rear by the rear wheel and adhering to each part of the paddy field work device, and the mud is adhering to the sliding part or the like. It is possible to avoid accelerated wear and increased driving resistance due to increased operating resistance, and less mud adheres to the details of paddy field work equipment, facilitating cleaning after work. It becomes.

[Configuration of the sixth invention]
According to a sixth aspect of the present invention, in any one of the first to fifth aspects, a holding means for holding various flexible elongated members such as a wire harness and a cable is provided on the rear side of the mudguard cover.

[Action]
When paddy field work equipment is equipped with various flexible elongated members such as wire harnesses and cables, keep the slender members away from the rotating parts of paddy field work equipment so that they do not come into contact with the rotating parts of paddy field work equipment. In general, the paddy field work apparatus is provided with a holding means (clamp or the like) for fixing.
In this case, according to the sixth invention, by providing the mudguard cover positioned in front of the paddy field working device with the holding means, the paddy field work device has the elongated member (from the rotating part of the paddy field work device as compared with the configuration including the holding means). The holding means) can be arranged far apart.

〔The invention's effect〕
Therefore, according to the sixth aspect of the invention, it is possible to reduce the possibility that various flexible elongated members such as wire harnesses and cables come into contact with the rotating parts of the paddy field work apparatus, and to prevent the elongated members from being damaged. I was able to.

  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 and 3, the seedling planting device 6 includes a seedling base 8 on which six mats of matted seedlings are placed and reciprocated horizontally by a fixed stroke, from the lower end of the seedling base 8. 6 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 in parallel to level the planting locations of the rice field T, and travel in the next stroke A pair of left and right markers 11 that form a reference line on the surface T are provided.

  The three leveling floats 10 arranged in parallel 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 and is a seedling for the surface T. It is used as a sensor float SF that detects the height of the planting device 6. The front part of the sensor float SF is linked to a rotary potentiometer (not shown) arranged in a fixed position at an appropriate position of the seedling planting device 6, and the swing angle around the rear fulcrum b of the sensor float SF is electrically The hydraulic cylinder 4 is controlled so that the detected value is within the set reference range, so that the seedling planting device 6 can be placed on the surface T in a predetermined manner regardless of the ups and downs of the traveling machine body 3 and the forward and backward inclination. Automatic elevation control (automatic planting depth control) is performed to maintain the height and stabilize the planting depth.

  The seedling planting device 6 is provided with a square tube-shaped planting frame 12 which is formed by extruding aluminum material at the front lower portion, and this planting frame 12 is mounted on the lower end of the lifting link mechanism 5 at the front-rear supporting point. It is connected and supported so that it can roll around p. 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. 1) 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 the opposite direction at a non-uniform speed, so that the planting claw 18 has a vertically long tip rotation trajectory extending between the seedling outlet at the lower end of the seedling table 8 and the rice field T ( (Not shown in the figure). 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. 2 and FIG. 3, a slide rail 21 that horizontally receives and supports the lower end portion of the seedling base 8 is slid horizontally on the 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. The amount of seedling removal by the planting claws 18 can be changed and adjusted by moving the seedling table up and down in the tilting direction of the seedling table with respect to the movement trajectory. For adjustment of the position of the slide rail 21, an adjustment lever 23 for adjusting the amount of seedling to be extracted, which is swingably operated around the fulcrum “a”, is used. By engaging with the notch of the provided lever guide 24, the slide rail 21 is configured to be fixed and 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 is swingable around the fulcrum c integrally with the float fulcrum shaft 26 is rocked by an adjustment lever 28 for changing the planting depth that is extended forward from the float fulcrum shaft 26 and can be locked. When the float support arm 27 is moved upward, the tip rotation trajectory 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 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 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 across the operation wire 41 led out from the operation unit 45 of the rolling drive device 40 to the left and right and the left and right portions of the horizontal frame 33, and the left and right operation wires 41 are connected by the electric motor 43. The entire seedling planting device 6 is driven and swung around the fulcrum p in the front-rear direction by performing a reverse operation.

  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 slightly inclined 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 operation part 45 of the rolling drive device 40 at the rear part of the lifting link mechanism 5 and the left and right parts 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 seedling planting device 6 is automatically prevented from tilting.

  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 that feeds the fertilizer in the fertilizer hopper 46, and the electric feed that winds the fed fertilizer through the supply hose 48 to the grooving device 49 provided in each leveling float 10 of the seedling planting device 6. A blower 50, 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, and the like are provided.

  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 operation of 44.

[Detailed Structure of Rolling Drive Device 40]
Based on FIGS. 4-9, the detailed structure of the rolling drive device 40 is demonstrated. 7 and 8 show cross-sectional views at positions AA and BB in FIG. 6, respectively.

  As shown in FIGS. 4 and 5, a bracket 66 is fixed to the upper part of the rear link 5 </ b> A of the lift link mechanism 5. The bracket 66 is formed in a U-shaped cross-sectional shape and extends from the upper part of the rear link 5A toward the front. The width of the bracket 66 in the left-right direction is set to be wider than the width of the upper link 5B of the lifting link mechanism 5, and when the seedling planting device 6 is lowered by operating the lifting link mechanism 5, The upper link 5B of the elevating link mechanism 5 enters the side so that the bracket 66 and the upper link 5B do not interfere with each other.

  A plurality of mounting holes are machined in the bracket 66, and the operation unit 45 of the rolling drive device 40 is placed on the upper surface side of the bracket 66, and a bolt 67 is tightened and fixed from the lower side, whereby a seedling platform 8, the rolling drive device 40 can be assembled to the bracket 66 in a narrow space ahead.

  As shown in FIGS. 4 to 9, the rolling drive device 40 includes a case 75, an electric motor 69, an output gear 70, a drive gear 71, a pulley 74, and an operation unit 45 including a cover 85, The seedling planting apparatus is configured by including the cable 80 and the buffer spring 42 connected to the operation unit 45, and integrally fixing the operation unit 45 to the bracket 66 and connecting the cable 80 and the buffer spring 42. 6 is configured so that the rolling drive device 40 can be mounted.

  In this way, by configuring the operation unit 45 so as to be integrally fixed to the bracket 66, for example, when assembling the rolling drive device 40, the operation unit 45 is assembled together, so that the rear upper part of the lifting link mechanism 5 is assembled. The work in a narrow space can be reduced, and the workability of the assembly work can be improved. Further, when maintaining the rolling drive device 40, the operation unit 45 is removed as a single body, thereby reducing the work in a narrow space at the rear upper part of the lifting link mechanism 5 and improving the workability of the maintenance work. Can do.

  The case 75 is made of aluminum, and is integrally formed with a motor mounting portion 76 that fixes the electric motor 69, a bearing portion 77 that supports the drive gear 71 and the pulley 74, a flange portion 78 that is fixed to the bracket 66, and the like.

  Engagement holes 76a for attaching a cover 85, which will be described later, are formed on the front surface side of the motor attachment portion 76 of the case 75. Engagement for attaching a cover 85, which will be described later, to the upper and lower portions of the bearing portion 77 of the case 75. Holes 77a and 77b are respectively formed.

  A screw portion 76b facing forward and backward is formed on the upper portion of the motor mounting portion 76 of the case 75, and a stay 53 is formed on the screw portion 76b so as to be bent in the shape of a long strip plate. Tightened and fixed. A circular opening 53 a is formed at the upper end of the stay 53, and left and right balance springs 36 are stretched across the opening 53 a and both left and right sides of the guide frame 35.

  As shown in FIGS. 7 and 8, the electric motor 69 is fixed to the motor mounting portion 76 of the case 75 with the output gear 70 fixed to the output shaft 69 a, and the deceleration built in the electric motor 69. The apparatus (not shown) is configured such that the rotation of the electric motor 69 is decelerated and output from the output shaft 69a. The motor mounting portion 76 of the case 75 is integrally formed with a protruding portion 76c having a shape protruding outward, and the output gear 70 is disposed inside the protruding portion 76c. A rightward opening is formed in the projecting portion 76c, and the output gear 70 and a drive gear 71 described later can be engaged through the opening (see FIG. 6).

  A drive shaft 72, to which a drive gear 71 is fixed in advance by welding, is rotatably supported by bearings 77 of the case 75 via bearings 73, 73, and the drive gear fixed to the drive shaft 72. A plurality of pulley mounting holes 71 a and 71 a are processed in the outer peripheral portion of 71 before welding to the drive shaft 72.

  The pulley 74 is made of resin, and has two V-grooves around which the cables 80 and 80 linked to the right and left buffer springs 42 and 42 are wound. A plurality of contact portions 74 a that contact the drive gear 71 are integrally formed on the pulley 74 at an equal pitch, and a plurality of cylindrical connection portions 74 b that are engaged with the pulley mounting holes 71 a of the drive gear 71 are integrated. Molded.

  The connecting portion 74b of the pulley 74 is fitted into the pulley mounting hole 71a of the drive gear 71, the contact portion 74a of the pulley 74 is brought into contact with the outer surface side of the drive gear 71 together with the boss portion 74c, and the nut 81 is tightened from the front. By fixing, the drive gear 71 and the pulley 74 engaged with the output gear 70 fixed to the output shaft 69a of the electric motor 69 are configured to rotate integrally around the axis P2.

  As described above, the drive gear 71 is fixed to the drive shaft 72, and the pulley 74 is fitted and fitted to the drive gear 71 so that the drive gear 71 and the pulley 74 can be integrally rotated. Compared to the case where the drive shaft 72, the drive gear 71, and the pulley 74 are configured so as to be integrally rotatable using the drive shaft 72, the drive gear 71, and the pulley 74 (not shown). This eliminates the need for processing and can reduce the manufacturing cost. In addition, the drive gear 71 and the pulley 74 can be easily and quickly attached to the drive shaft 72, thereby improving the workability of assembly work and maintenance work.

  A rotation gear 82 is fitted on the rear end portion of the drive shaft 72, and the rotation gear 82 is engaged with a sensor gear 84 connected to the rotation sensor 83, and the rotation speed of the drive shaft 72 is adjusted by the rotation sensor 83. It is configured so that it can be detected. The rotation sensor 83 is connected to a control device (not shown) of the rice transplanter, and the electric motor 74 can be accurately controlled by feeding back the detection result from the rotation sensor 83.

  As described above, by adopting a configuration in which the electric motor 69, the drive shaft 72, the drive gear 71, the pulley 74, and the like are mounted on the case 75, the drive gear 71 and the like are loose due to vibration of the seedling planting device 6 and the like. Therefore, the power from the electric motor 69 can be transmitted to the pulley 74 with high accuracy, and the rolling control can be performed with high accuracy.

  The cover 85 is made of resin, and is rounded to match the shape of the pulley 74, the drive gear 71, and the protrusion 76c so that the pulley 74, the drive gear 71, and the protrusion 76c of the motor mounting portion 76 can be compactly covered from the front. It is molded into a curved shape. Notches 86 are formed on the left and right sides of the upper portion of the cover 85, and the cable 80 wound around the pulley 74 is extended from the notches 86 to the left and right so that it can be linked to the buffer spring 42. Has been.

  Engagement pieces 87 protruding rearward are integrally formed at the left end of the cover 85, and engagement pieces 88 and 89 protruding rearward are integrally formed at the upper end and lower end of the cover 85, respectively. Has been.

  The engaging piece 87 of the cover 85 is engaged with the engaging hole 76a of the case 85, the engaging piece 88 on the upper part of the cover 85 and the engaging hole 77a of the case 75 are positioned, and the engaging piece 89 on the lower part of the cover 85 is positioned. And the engagement hole 77b of the case 75 are positioned and when the cover 75 is pushed a little from the front to the rear, the engagement pieces 88 and 89 are engaged with the engagement holes 77a and 77b, respectively, and a dedicated tool or the like is used. The cover 85 can be easily and quickly attached to the case 75 with one touch.

  When the cover 85 is elastically deformed by slightly pushing downward and upward portions of the engagement piece 88 and the engagement piece 89 of the cover 85, the engagement holes 77a and 77b of the engagement pieces 88 and 89 of the cover 85 are compressed. When the engagement of the engagement piece 87 is released and the portion of the cover 85 positioned in front of the engagement piece 87 is pushed rightward to elastically deform the cover 85, the engagement of the engagement piece 87 to the engagement hole 76a is released. . By moving the cover 85 rearward in this state, the cover 85 can be easily and quickly removed from the case 75 with one touch without using a dedicated tool or the like.

In addition to the above-described structure, the structure for rolling control of the seedling planting device 6 includes that when the seedling planting device 6 rolls more unexpectedly than set, as shown in FIGS. Is provided with a stopper device 90.
When the seedling planting device 6 connected and supported around the fulcrum p in the front-rear direction at the rear part of the lifting link mechanism 5 is in the center state of the left and right rolling, the point where the drive gear 71 is meshed with the output gear 70 is left and right rolling. As a center position, a rolling state in which the rotation sensor 83 detects a position where the drive gear 71 has rotated 100 degrees to the left and right is defined as a control rolling limit position. The stopper device 90 operates when it is further inclined by 30 degrees (130 degrees to the left and right from the left and right center of the rolling).
As shown in FIGS. 6, 7, and 9, the stopper device 90 includes three fitting pieces that are to be fitted in the valleys of the teeth of the drive gear 71 near the upper end of the pulley 74 on the drive gear 71 side. The stopper piece 90a is integrally formed with the pulley 74 and resin.

  The rotation angle of the pulley 74 from the rolling center until the output gear 70 comes into contact with the fitting piece that the output gear 70 first bites in the stopper piece 90a is about 130 degrees. When the motor 69 is driven and rotated unexpectedly and the output gear 70 contacts the fitting piece, it is possible to prevent the motor 69 from being driven further, and when an output exceeding the normal output is applied, the stopper piece 90a. Is broken and the rotation of the motor 69 is forcibly stopped in a state where the teeth of the output gear 70 are engaged with the stopper piece 90a.

  If the above structure is adopted, it is possible to perform mechanical locking without using sector gears and using all-tooth gears that are less expensive than sector gears. And the drive system between the motor 69 and the output gear 70 from the motor 69 is protected, and repair can be made inexpensive.

FIG. 10 shows the structure of the fuel tank 91. The fuel tank 91 is disposed below the floor step 39 slightly ahead of the right rear wheel.
A fuel suction pipe 92 is disposed from the bottom of the bottom portion 91a of the fuel tank 91 to the upper surface of the tank, and is connected to the fuel filter 93 via a fuel pipe 94. The fuel filter 93 and the electromagnetic fuel pump 95 are connected. Are connected via a fuel pipe 96 and fuel is supplied from a fuel pump 95 via a fuel pipe 97 to the engine.

  The fuel filter 93 and the fuel pump 95 are connected to an integrally formed bracket 99. The return oil from the engine is returned to the fuel tank 91 via a fuel return pipe 98, and the fuel return pipe 98 and the fuel suction pipe 92 are connected to a bracket 99 having an integral structure. In this way, the fuel suction pipe 92, the fuel filter 93, the fuel pump 95, and the fuel return pipe 98 are mounted on the bracket 99 as a single bracket to form a unit, so that the unit can be integrated as a unit only by removing the pipe leading to the engine side. Therefore, maintenance and replacement of the fuel filter 93 and the fuel pump 95 can be facilitated.

  A pair of left and right mudguard covers 55 for receiving mud splashed rearward from the rear wheel 2 are mounted in a forward tilted posture on the front portion of the seedling planting device 6 described above. The mudguard cover 55 is formed in a plate shape by blow molding a resin material. As shown in FIGS. 2, 3, and 11 to 14, each mudguard cover 55 is an engagement means provided in the vicinity of the center of gravity position of each mudguard cover 55 or at the center side (inner side) in the left-right direction of the machine body. And fixing means provided at the left and right outer portions of the mudguard cover 55. Both engaging means and fixing means are provided on both the upper and lower parts of the mudguard cover 55.

The upper engaging means is provided on the center side (inner side) of the machine body in the left-right direction with respect to the center of gravity of the mudguard cover 55, and the stay 52 (corresponding to a fixed portion on the paddy field work apparatus side) erected from the horizontal frame 33. A grooved pin 61 (corresponding to a support member) provided fixed to the upper end toward the front, and engaged with the grooved pin 61 by being provided closer to the center side (inside) in the lateral direction of the machine than the center of gravity of the mudguard cover 55 Thus, the mudguard cover 55 is composed of a dharma hole 60 (corresponding to an engaged portion) formed so as to be movable in the horizontal direction.
The lower engaging means are provided at two locations, the vicinity of the center of gravity position of the mudguard cover 55 and the center side (inside) in the left-right direction of the machine body, and the L-shaped receiving plate 54 (fixed to the planting frame 12) The grooved pin 61 (corresponding to a support member) fixed to the front of the paddy field work apparatus side), the position near the center of gravity of the mudguard cover 55, and the center of gravity of the mudguard cover 55 It is composed of a dharma hole 60 (corresponding to an engaged portion) provided on the center side (inside) in the left-right direction.

The dharma hole 60 includes a circular hole portion 60a that is considerably larger than the large-diameter portion of the pin through which the grooved pin 61 can be inserted and removed, and a groove formed in the center side (inner side) in the left-right direction of the machine body. The narrow pin portion 60b is wider than the outer diameter of the groove portion of the attached pin 61 and narrower than the large diameter portion and is long in the left-right direction.
The mudguard cover 55 is inserted into the grooved pin 61 by inserting the circular hole portion 60a of the dharma hole 60 of the mudguard cover 55 into the stay 52 and the grooved pin 61 projecting forward from the planting frame 12 on the center side of the machine body. The grooved pin 61 is moved from the circular hole portion 61a to the narrow groove portion 60b by pulling and moving the mudguard cover 55 outward in a state where the mudguard cover 55 is suspended, and the mudguard cover 55 is engaged and held in the retaining state. .

  The fixing means includes a hanging metal fitting 63 provided on the upper and lower sides of the mudguard cover 55 in the left-right direction of the machine body, a stay 52 on the upper side, and a toggle type fastening metal fitting 62 attached to the planting frame 12 on the lower side. The mudguard cover 55 is fixedly connected to the fixed part by hooking the hooks 64 of the toggle type fastening brackets 62 attached to the stay 52 and the planting frame 12 to the engaging parts of the hanging brackets 63 provided on the mudguard cover 55. It is comprised so that it may do. By adopting such a structure, not only can the mudguard cover 55 be easily attached and detached without tools, but also when the mudguard cover 55 is attached to the seedling planting device 6, a hand that is on the left and right center side of the mudguard cover 55. As for the place where it is difficult to reach, it is only necessary to insert the grooved pin 61 into the dharma hole 60 formed in the mudguard cover 55, and as shown in FIG. 62 is fastened and fixed by a metal fitting 63. FIG. 13 and FIG. 14 show a procedure for engaging the hook 64 of the toggle type fastening bracket 62 with the hanging bracket 63. The dull hole 60 formed in the mudguard cover 55 is inserted into the grooved pin 61 so that the mudguard cover 55 is supported by the fixing portion, and the hook 64 of the toggle type fastening bracket 62 is hooked on the hanging bracket 63 to be fastened and fixed. Only. Therefore, the mudguard cover 55 can be attached and detached very easily.

  Each mudguard cover 55 is opposed to the rear wheel 2 from behind and is vertically long from the vicinity of the front end of the left and right leveling floats 10 to a high position above the rear wheel shaft center x, and from the front to the left and right leveling floats 10. It is formed in a wide overlapping area, and the whole is attached in a forward tilted posture. The upper end of the mudguard cover 55 is set at a height that covers most of the balance spring 36 and the buffer spring 42 from the front, and mud scattered by the rear wheel 2 adheres to the balance spring 36 and the buffer spring 42. It is prevented that the spring function is reduced due to solidification.

  The upper and lower intermediate portions of the mudguard cover 55 are curved so as to bulge forward over the entire width, and an electric motor 44 that drives the marker 11 up and down is disposed behind the curved bulging portion 55a. The lower half of the curved bulging portion 55a is a mud dropping guide surface G that is inclined forward and downward at a tighter angle than the forward tilting angle of the mudguard cover 55 as a whole, and this mud dropping guide surface G is formed. The curved bulging portion 55a is the position closest to the rear wheel 2 in the upper position near the rear wheel shaft center x in the seedling planting work posture of the seedling planting device 6 with the leveling float 10 grounded, and the rear wheel 2 Most of the mud that is splashed off is received by the steeply-sloping mud drop and guided by the guide surface G and quickly dropped by its own weight, so that a large amount of mud adheres to and accumulates on the mudguard cover 55 is prevented.

  Further, even in the shallowest planting state where the leveling float 10 is adjusted to the lowest position, the lower end of the mudguard cover 55 is substantially the same height as the upper end of the leveling float 10 located behind it, preferably from the upper end of the leveling float 10. It is comprised so that it may be located in a low position, and it is prevented that mud splashes back from between the lower end of the mudguard cover 55 and the leveling float 10.

  A large number of small through holes 56 are formed in parallel in the mudguard cover 55 above the mud dropping guide surface G as maintenance opening parts A, and washing water is passed through the through holes 56 on the back of the mudguard cover 55. By blowing, the front part of the seedling planting device 6 concealed by the mudguard cover 55 can be washed.

  An opening 57 is formed at an appropriate position of each mudguard cover 55. The supply hose 48 is inserted into the opening 57 so that the hose 48 is supported without moving. The opening 57 can also be used as an opening A for maintenance that blows cleaning water into the back of the mudguard cover 55.

As shown in FIGS. 3 and 12, hook clamps 65 (corresponding to holding means) are integrally formed at a plurality of locations on the rear surface (rear side) of the mudguard cover 55 (or hook clamps 65 as separate members are formed). The mudguard cover 55 is attached to a plurality of locations on the rear surface (rear side)).
The hook clamp 65 is configured in a C shape, and the entrance portion is configured to be opened and closed elastically by the elasticity of the resin material. By opening (inserting) the elongated member into the inside of the hook clamp 65 so as to open the entrance portion of the hook clamp 65 from the outside,
The elongated member can be held by the hook clamp 65, and conversely, the elongated member can be pulled out from the hook clamp 65. As an elongated member to be held, a cable (not shown) for operating a small number of clutches (not shown) capable of transmitting and interrupting power to a small number of planting mechanisms 9, and transmitting and interrupting power to a small number of seedling feeding belts 37 A cable (not shown) for operating a free vertical feed clutch (not shown), a wire harness (not shown) of a seedling remaining amount sensor (not shown) for detecting the remaining amount of mat-like seedlings on the seedling table 8 ) Etc.

[Another embodiment]
As the Dalma hole 60, the larger the inner diameter of the circular hole portion 60a, the easier it is to insert into the grooved pin 61. However, as long as it is larger than the large diameter portion of the grooved pin 60, it can be set to any size as required. It is easier to slide the mudguard cover 55 by aligning the groove 60b of the Dalma hole 60 with the tangent of the circular hole 60a. However, if the circular hole 60a is not so large, the groove 60b is formed as a circular hole as shown in FIG. The Dalma hole 60 having a shape positioned closer to the center of the circular hole 60a without being aligned with the tangent line of 60a may be employed.

In the above embodiment, the support member and the grooved pin are used, and the Dalma hole 60 is used as the engaged member. However, these are reversed to form the Dalma hole 60 on the plate surface of the support member, and the mudguard cover 55 A grooved pin may be formed.
Also, as the supporting member and the engaged portion, one is a horizontally long rail using an I-shaped, L-shaped or T-shaped flat plate, an L-shaped member, or a T-shaped member when viewed from the side, and the other is the same. It can also be a guide rail to be fitted. In this case, if the supporting member is extended to near the left and right lateral outer sides of the paddy field work device, the mudguard cover 55 is simply slid by inserting the engaged portion on the mudguard cover 55 side into the support member of the paddy field work device. The mudguard cover 55 can be easily attached.

  In the above embodiment, the toggle type fastening bracket 62 is attached to the fixing portions 12 and 52, and the hanging fitting 63 is attached to the mudguard cover 55. Conversely, the toggle type fastening bracket is provided on the mudguard cover 55 side. 62 may be attached, and the metal fitting 63 may be attached to the fixed portion.

  As the fixing means, bolts and nuts may be used in place of the toggle type fastening bracket 62. In this case, a bolt insertion hole may be provided in the paddy field work device side fixing portion and the mudguard cover 55, and the bolt may be fixed by a nut through the bolt, or a bolt may be implanted in the paddy field work device side fixing portion. At the same time, a long hole may be formed in the mudguard cover 55 in the lateral direction, and a bolt may be inserted into the long hole of the mudguard cover 55, and then the nut may be tightened.

  In the above embodiment, the mudguard cover 55 is mounted on the paddy field work apparatus side, but the mudguard cover 55 may be provided on the traveling machine body 3 side such as the lifting link mechanism 5.

Whole side view of rice transplanter Front view of seedling planting device Side view of seedling planting device Side view showing structure of rolling drive Front view showing structure of rolling drive Front view showing the operation unit structure of the rolling drive FIG. 6 is a cross-sectional plan view of the operation unit structure of the rolling drive device as shown by arrows AA in FIG. FIG. 6 is a longitudinal side view of the operation unit structure of the rolling drive device showing the arrow B-B in FIG. 6. Front view of the output gear showing the position of the stopper piece The perspective view which shows the attachment structure of the fuel suction part of a fuel tank Partial longitudinal side view showing the upper locking structure of the mudguard cover Partially cut side view showing the bottom locking structure of the mudguard cover The figure which shows the installation procedure of the mudguard cover upper part The figure which shows the installation procedure of the mudguard cover lower part The front view which shows embodiment of the dharma hole of the retaining structure of a mudguard cover Front view showing another embodiment of the dharma hole of the mudguard cover locking structure

Explanation of symbols

2 Rear wheel 3 Traveling machine 6 Paddy field work device (seed planting device)
12 Fixed part (planting frame)
52 Fixed part (stay)
55 Mudguard cover 60 Engaged part (Dharma hole)
61 Support member (grooved pin)
62 Toggle type clamps 63 Hanging brackets 65 Holding means (hook clamp)
x Rear wheel axle

Claims (6)

In the paddy field work machine where the paddy field work device is connected to the rear part of the traveling machine body so as to be movable up and down,
A mudguard cover is provided in front of the paddy field working device to catch mud scattered rearward by the rear wheel of the traveling machine body, and a supporting member that supports the mudguard cover on a fixed part on the paddy field working apparatus side or the traveling machine body side. A paddy field machine characterized in that an engaged portion is provided on the mudguard cover side so as to engage with the support member so that the mudguard cover can move in the lateral direction.   The paddy field machine according to claim 1, further comprising a fixing means for fixing the mudguard cover to a fixed part on the paddy field work device side or the traveling machine body side in a state where the engaged portion is engaged with the support member.   The paddy field machine according to claim 2, wherein the fixing means is provided only on a portion of the mudguard cover near the outside of the paddy field work device.   The paddy field machine according to claim 2 or 3, wherein the fixing means comprises a toggle type fastening bracket and a hanging bracket.   The paddy field work machine according to any one of claims 1 to 4, wherein the mudguard cover is arranged to be disposed from the lower part of the paddy field work device to at least a position above the rear wheel axis.   The paddy field work machine according to any one of claims 1 to 5, wherein holding means for holding various flexible elongated members such as a wire harness and a cable is provided on the rear side of the mudguard cover.

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