JP4764302B2 - 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 and a paddy field direct seeding 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 portion of the leveling float located just behind the rear wheel to prevent mud from adhering to the leveling float, There is a known structure that avoids undesirably sinking due to the weight of mud on which the float has adhered and deposited, and increasing the amount of mud pushing on the 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 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.

  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.

1st invention is the paddy field machine which connected the paddy field work device to the rear part of a running machine body so that raising and lowering was possible,
In front of the paddy field work device, a mudguard cover that catches mud scattered rearward by the rear wheel of the traveling machine body is provided from the lower part of the paddy field work device to a position located above the rear wheel shaft center , and a traveling reference index is provided. A marker comprising a marker body formed on the surface of the marker arm is provided on the back of the mudguard cover so as to be able to swing up and down, and the marker arm that is swung up and down is inserted into the back of the mudguard cover. It is characterized by that.

  According to the above configuration, the mudguard cover covers the paddy field work device up and down widely, and also has a wide width that covers the marker arms located at the left and right ends of the paddy field work device. Is preferably prevented from adhering to and depositing on the exposed front surface of the paddy field work apparatus and the marker arm.

  Therefore, according to the first invention, it is possible to reliably prevent mud scattered widely in the vertical direction toward the rear by the rear wheel from being deposited on the paddy field work apparatus, and mud adheres to the sliding portion and wears out. It is possible to avoid the situation where the driving load is increased due to an increase in operating resistance due to an increase in operating resistance. In addition, it is possible to reliably prevent mud scattered up and down widely by the rear wheels from adhering to the marker arm and depositing on the marker arm, and to increase the driving load of the swinging motion of the marker arm in advance. Can be avoided. Mud does not adhere to the details of the paddy field work device, and cleaning after work is easy.

According to a second invention, in the first invention,
Concave portions in which the vertically oscillated marker arms cross and engage are formed on the left and right end sides of the mudguard cover, and a portion below the concave portions of the marker arms enters the back portion of the mudguard cover.

  According to the above configuration, when the marker arm is swung upright, the marker arm portion above the recess is projected to the front side of the mudguard cover, and the marker body provided on the tip side of the marker arm is the mudguard cover. Even if mud adhering to the marker body is splashed up, it is prevented from entering the back of the mudguard cover and adhering to the paddy field work device.

According to a third invention, in the first or second invention,
The base end of the marker arm is swingably supported by the mudguard cover.

According to the above configuration, the long marker arm can be removed together by removing the mudguard cover, which is convenient for maintenance work and cleaning work.
If the mudguard cover is resin-molded, the boss portion that pivotally supports the base end of the marker arm can be integrally molded, which is effective in reducing the number of parts and reducing the cost in the marker fulcrum structure.

A fourth invention is the invention according to any one of the first to third inventions,
The mudguard cover is provided with a locking portion for locking and holding the marker arm in the upright retracted posture.

  According to the above configuration, even if there is a manufacturing error or assembly error in the fulcrum position of the marker arm or the swing angle of the marker arm, the standing and storing marker arm can be stored at a predetermined position with respect to the mudguard cover. Storing in a state in which it is unduly protruding from the mudguard cover and bringing it into contact with other objects can be avoided in advance.

A fifth invention is the invention according to any one of the first to fourth inventions,
A support arm mounted with a marker body is inserted into and supported by the tip of the marker arm so as to be able to swing back and forth, and the base of the support arm is inserted into a support fitting fixed to the tip of the marker arm and positioned to the left and right. A recess is formed.

  According to the above configuration, the structure of the marker body can be easily determined from side to side, and the support arm can be removed from the marker arm by releasing the engagement with the recessed portion, and the deformed or damaged support arm can be repaired. Or it can be easily removed for replacement.

A sixth invention is the invention according to any one of the first to fifth inventions,
The marker arm and the marker retracting operation member are interlocked and connected by a connecting member, and the connecting position of the connecting member with respect to the operating member can be selected at a plurality of positions.

  According to the above configuration, the height of the marker body to be grounded can be changed by changing the position of the marker arm that has fallen to the working posture by changing the connection position of the linkage member with respect to the operating member, The marker main body is grounded at a corresponding height, and the running reference index can be accurately formed.

  FIG. 1 shows a riding type rice transplanter with a fertilizer application apparatus which is an example of a paddy field working machine according to the present invention. This riding type rice transplanter is configured to have a six-row planting specification, and is 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 to be a four-wheel drive type. A lifting / lowering link mechanism 5 having a parallel quadruple link structure is provided, and a seedling planting device (paddy field working device) 6 is connected to and supported by the rear end lower portion of the lifting / lowering link mechanism 5 so as to be capable of rolling around the fulcrum p in the front-rear direction. It has a structure in which a fertilizer 7 is mounted on the rear part of the machine body 3.

  The seedling planting device 6 mounts mat-like seedlings for six strips, cuts out seedlings one by one from the lower end of the seedling rest base 8 that is reciprocated horizontally by a fixed stroke, and cuts the surface T 6 sets of rotary planting mechanisms 9 to be planted on the ground, three leveling floats 10 arranged in parallel to level the planting location of the surface T, and a pair of left and right forming a running reference index for the next stroke on the surface T Marker 11, etc. are provided.

  As shown in FIGS. 2 and 3, the front lower portion of the seedling planting device 6 is equipped with a left and right square tubular planting frame 12 formed by extruding an aluminum material, and this planting frame 12 serves as the lifting link mechanism 5. It is connected to the lower end of the rear end via a feed case 13 so as to be freely rollable. A feed case 13 that receives power from the traveling machine body 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 mechanism 9 is mounted on the left and right ends of a planting drive shaft 15 that is penetrating and horizontally mounted on the rear end portion of 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 claws 18 bring the seedlings cut out and held from the lower end of the seedling table 8 into the surface T, the seedling pusher 19 protrudes toward the toe side to separate the retained seedlings from the planting nails 18 and push them into the ground. It is configured to

  As shown in FIGS. 3 and 4, a slide rail 21 is horizontally mounted on the upper portion of the planting case 14 to receive and support the lower end portion of the seedling table 8 so as to be slidable in the left and right directions. 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. The position of the slide rail 21 is adjusted so that the seedling table 8 is moved with respect to the tip rotation locus S. By moving up and down, it is possible to change and adjust the seedling extraction amount by the planting claws 18. For adjusting the position of the slide rail 21, a seedling removal amount adjusting lever 23 that is swung around the fulcrum a is used. A lever guide 24 provided on the planting frame 12 is provided with the swinging adjusted seedling removal amount adjusting lever 23. 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 in the lateral direction below the front portion of the planting case 14, and the leveling float 10 is provided at the rear end of 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. A float support arm 27 that can swing around the fulcrum c integrally with the float fulcrum shaft 26 is swing-operated by a planting depth adjusting lever 28 that extends forward and upward from the float fulcrum shaft 26. When the float support arm 27 is moved upward, the tip rotation locus S of the planting claw 18 is lowered with respect to the surface T to increase the planting depth, and the float support arm 27 is moved downward to rotate the tip. The locus S rises with respect to the surface T and the planting depth becomes shallow. The planting depth adjusting lever 28 can be locked to a notch 29 of the lever guide 24 and fixedly held at an arbitrary adjusting position.

  The working power extracted from the traveling machine body 3 is transmitted to the feed case 13 via the telescopic transmission shaft 30, and the seedling setting table 8 is laterally driven with a constant stroke by the power transmitted to the feed case 13. At the same time, the seedling feeding belt 31 provided on the seedling setting table 8 is fed at a constant pitch for each stroke end. The horizontal axis power extracted from the feed case 13 is input to the front portion of each planting case 14.

  From the left and right sides of the planting frame 14, pillars 32 are erected, and guide rollers 34 are provided at a plurality of left and right sides of a horizontal frame 33 that is installed and fixed over the pillars 32. The upper part of the seedling base 8 engaged with the guide frame 35 horizontally connected to the back surface and 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 over 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. In addition, since the buffer spring 42 is installed between the rolling drive device 40 and the seedling planting device 6, the seedling planting device 6 performs a free rolling operation while deforming the buffer spring 42 even when the rolling drive device 40 is in a non-operational state. The seedling planting device 6 follows the ground surface T even if the traveling body 3 is slightly inclined to the left and right.

  A balance spring 36 is stretched over the rear upper part 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 seedling planting device 6 is automatically prevented from tilting.

  The fertilizer application device 7 is mounted on the traveling machine body 3 between the driver seat 20 provided at the rear part of the traveling machine body 3 and the seedling planting device 6, and a fertilizer hopper for storing powdered fertilizer. 46, a rotary feeding mechanism 47 that feeds the fertilizer in the fertilizer hopper 46, and an electric motor 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.

  As shown in FIGS. 7 and 8, the marker 11 has a marker arm 11a attached to the left and right ends of the planting frame 12 so as to swing up and down around a fulcrum d, and can swing back and forth at the tip of the marker arm 11a. A support arm 11b coupled to the lower end of the support arm 11b, a rotary marker main body 11c rotatably mounted on the lower end of the support arm 11b, and a torsion spring 11d that locks the support arm 11b and elastically holds it in a predetermined swing position. Etc. are constituted. The marker arm 11a is linked to an operating member 56 that is rotationally driven by an electric motor 55 via a linkage member 57 made of a torsion spring, and the electric motor 55 operates forward and reverse, whereby a solid line in FIG. As shown in FIG. 7, the marker arm 11a is erected laterally and overlaid, and the marker body 11c is erected as shown by the phantom line in FIG. 11c is configured to be swingable by switching to a retracted posture in which the surface 11c is largely levitated above the surface T.

  As shown in FIGS. 10 and 11, a recess 58 is notched in the support fitting 11e fixed to the tip of the marker arm 11a, and the base of the support arm 11b is inserted into the recess 58 so that the support arm 11b Positioning in the left-right direction is made. As shown in FIG. 9, the actuating member 56 for retracting the marker is formed with a plurality of connecting holes 59 with the connecting member 57, and the marker arm 11a is stood up by selectively changing the connecting position. The posture can be changed.

  A pair of left and right mudguard covers 60 are attached to the front portion of the seedling planting device 6 configured as described above to receive mud splashed rearward from the rear wheel 2. The mudguard cover 60 is formed in a plate shape by blow molding a resin material, and as shown in FIG. 5, the left and right portions of the upper end portion are bolted and fixed to the horizontal frame 33 via brackets 61, As shown in FIG. 6, the left and right portions of the lower portion of the mudguard cover 60 are fastened together using a through bolt 62 that connects the planting case 14 to the planting frame 12. The through bolt 62 is fastened to a receiving plate 63 with a nut provided along the planting frame 12.

  Each mudguard cover 60 faces the rear wheel 2 from the rear 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 axis x and from the front to the left and right leveling floats 10. Overlapping and wide. The upper and lower intermediate portions of the mudguard cover 60 are curved so as to bulge forward over the entire width, and an electric motor 55 that drives the marker 11 up and down is disposed behind the curved bulging portion 60a. The lower half of the curved bulging portion 60a is a mud dropping guide surface G that is inclined forward and downward at a tighter angle than the forward tilt angle of the mudguard cover 60 as a whole. A large amount of mud drops are received by the steeply sloping guide surface G and quickly dropped by their own weight, so that a large amount of mud adheres to and accumulates on the mudguard cover 60 is prevented.

  Even in the shallowest planting state where the leveling float 10 is adjusted to the lowest position, the lower end of the mudguard cover 60 is substantially the same height as the upper end of the leveling float 10 located behind it, preferably a position lower than the upper end of the leveling float 10. The mud is prevented from scattering backward from between the lower end of the mudguard cover 60 and the leveling float 10.

  Notches 64 are formed at appropriate positions around each mudguard cover 60. The supply hose 48 is inserted into the notch 64 and is locked inside the notch 64 by the elastic restoring force of the hose itself so that it is supported without being unjustly displaced.

  Each mudguard cover 60 is formed in a wide side so as to cover the fulcrum d of the marker 11 from the front, and when the marker arm 11a is erected and swung in the retracted position on the lateral outer edge of each mudguard cover 60, A recess 65 that crosses and engages the intermediate portion of the marker arm 11a is formed, and the marker arm 11a in the retracted position enters the back of the mudguard cover 60 below the recess 65 and forwards the mudguard cover 60 above the recess 65. To be exposed.

  Thus, the marker arm 11a in the retracted position is exposed to the front of the mudguard cover 60 above the recess 65, so that mud adhering to the marker main body 11c may be splashed up as the marker arm 11a is erected. The mud splashed off in front of the mudguard cover 60 does not enter the back of the mudguard cover 60 and adhere to the seedling planting device 6.

  Near the lateral outer end of the mudguard cover 60, a hook-shaped locking portion 66 is provided, and when not working, the marker arm 11a is raised from the retracted position to the substantially vertical state manually while bending the linkage member 57. By swinging and being locked and locked by the locking portion 66, the marker 11 can be stored and locked so that it does not inadvertently protrude into the use posture.

  A hose holding portion 60b protruding forward is integrally formed with the curved bulging portion 60a of the mudguard cover 60. This hose holding part 60b can insert and hold the front end part of the supply hose 48 removed from the delivery mechanism 47 when the seedling planting device 6 is detached from the lifting link mechanism 5.

[Other Examples]
(1) As shown in FIGS. 12 and 13, a boss portion 60 c that forms a fulcrum d of the marker arm 11 a can be integrally formed near the left and right ends of the back surface of the mudguard cover 60. In this case, it is desirable that the electric motor 55 and the operation member 56 for the marker exit / retreat operation are mounted and supported on the back surface of the mudguard cover 60 so that the entire marker 11 can be removed by removing the mudguard cover 60. .

(2) The entire marker arm 11a may be hidden behind the mudguard cover 60 when the marker 11 is swung upright in the retracted position.
(3) Instead of the rotary marker body 11c, a rod-shaped fixed marker body (not shown) may be configured.

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 Vertical side view showing the upper mounting structure of the mudguard cover Longitudinal side view showing the lower mounting structure of the mudguard cover Front front view showing mudguard cover and usage posture marker Front front view showing mudguard cover and retractable lock position marker Front view of marker operation structure Top view showing part of the marker Vertical side view showing a part of the marker Side view of seedling planting device with mudguard cover of another embodiment Longitudinal side view showing the lower attachment structure of the mudguard cover of another embodiment

Explanation of symbols

2 Rear wheel 3 Traveling machine body 6 Paddy field work device 11 Marker 11a Marker arm 11b Support arm 11c Marker body 56 Actuating member 57 Linking member 58 Recessed portion 60 Mudguard cover 65 Recessed portion 66 Locking portion x Rear wheel shaft center T

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,
In front of the paddy field work device, a mudguard cover that catches mud scattered rearward by the rear wheel of the traveling machine body is provided from the lower part of the paddy field work device to a position located above the rear wheel shaft center , and a traveling reference index is provided. A marker comprising a marker body formed on the surface of the marker arm is provided on the back of the mudguard cover so as to be able to swing up and down, and the marker arm that is swung up and down is inserted into the back of the mudguard cover. Paddy field work machine characterized by that.   2. A concave portion in which the marker arm erected and swung is cross-engaged is formed on the left and right end sides of the mudguard cover, and a portion below the concave portion of the marker arm enters the back of the mudguard cover. The paddy field machine described.   The paddy field work machine according to claim 1 or 2, wherein a base end of the marker arm is swingably supported by the mudguard cover.   The paddy field machine according to any one of claims 1 to 3, wherein a locking portion that locks and holds the marker arm in a standing storage posture is provided in the mudguard cover.   A support arm mounted with a marker body is inserted into and supported by the tip of the marker arm so as to be able to swing back and forth, and the base of the support arm is inserted into a support fitting fixed to the tip of the marker arm and positioned to the left and right. The paddy field machine according to any one of claims 1 to 4, wherein a recess is formed.   6. The marker arm and an operation member for marker withdrawal / retraction operation are linked and linked by a linkage member, and the linkage position of the linkage member with respect to the actuation member can be selected at a plurality of positions. The paddy field machine according to any one of the above.

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