JP2007267664A - Paddy field working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly prevent adhesion and accumulation of muds scattered backward by rear wheels to an implement for paddy field in a paddy field working machine liftably connecting the implement for paddy field on the rear part of a travelling machine body. <P>SOLUTION: In the paddy field working machine, mudguard covers 55 which catch the muds scattered backward by the rear wheels 2 of the travelling machine body 3 are installed ranging from near the surface T of the field to a point above the shaft center x of the rear wheels in front of the implement 6 for paddy field, and are constituted to be vertically moved in the same directions accompanying with lift movements of the implement 6 for paddy field. <P>COPYRIGHT: (C)2008,JPO&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 direct sowing device, a weeding device, and a spraying device are connected to a rear portion of a traveling machine body so as to be movable up and down.

In paddy field machines, mud scattered backward by the rear wheels during traveling in the paddy field often adheres and accumulates on the paddy field work device. In a rice transplanter, which is a typical paddy field work machine, for example, as shown in Patent Document 1, a mudguard cover is provided above the front part of the leveling float located just behind the rear wheel, and mud is placed on the leveling float. It is known that it is configured to prevent the deposits from accumulating and avoiding the undesirably subsidence due to the weight of mud adhering to the leveling float and increasing the 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 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. Moreover, since mud adheres to the details of the mechanical device, it takes a lot of labor and time for cleaning after planting.

  The present invention has been made paying attention to such points, and it is intended to reliably prevent mud scattered widely in the vertical direction toward the rear by the rear wheel from adhering and accumulating on the paddy field work apparatus. Yes.

The first invention is a paddy field work machine in which a 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 near the paddy field to the upper part of the rear wheel shaft center, and this mudguard cover is moved up and down of the paddy field work device. Accordingly, it is configured to move up and down in the same direction.

  According to the above configuration, in order to position the paddy field work device at a predetermined working height with respect to the paddy field, the paddy field work device is raised with respect to the traveling machine body in a deep paddy field, and the paddy field work device is moved with respect to the traveling machine body in a shallow paddy field. The mudguard cover is also raised and lowered as the paddy field work apparatus is raised and lowered. Therefore, the mudguard cover is widely covered from near the paddy field to the upper part of the rear wheel shaft center without being immersed in the paddy field regardless of the depth of the paddy field. Adhesion and deposition on the site is prevented.

  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. Mud does not adhere to the details of the mechanical device in the paddy field work device, and cleaning after work becomes easy.

According to a second invention, in the first invention,
The mudguard cover is attached to the paddy field work device.

  According to the said structure, a mudguard cover can be easily moved up and down in the same direction with the raising / lowering of a paddy field working apparatus, and a good mudguard function can be exhibited without roughening a rice field with a mudguard cover.

According to a third invention, in the second invention,
The paddy field work device is a seedling planting device in which a leveling float is arranged so that the height of the planting mechanism can be adjusted, and in the shallowest planting state in which the leveling float is adjusted downward relative to the planting mechanism, the mudguard cover It is comprised so that a lower end may be located in the substantially same height as the upper end of the said leveling float located in the back.

  According to the above configuration, even in the shallowest planting state where the leveling float is adjusted to the lowest position, mud can be prevented from splashing backward from between the lower end of the mudguard cover and the leveling float, and the planting depth However, suitable mudguards can be performed.

A fourth invention is the invention according to any one of the first to third inventions,
A pair of left and right mudguard covers are arranged facing the rear wheel.

  According to the above configuration, by installing the mudguard cover with the left and right mud scattering sources (rear wheels) facing each other separately, mud adhesion can be effectively performed without using a large mudguard cover that covers the entire surface of the paddy field work device. Can be prevented.

A fifth invention is the invention according to any one of the first to fourth inventions,
The mudguard cover is formed with a notch or opening through which a member deployed across the traveling machine body and the paddy field work device passes.

  According to the said structure, mudguard covers with a large mud receiving area can be arbitrarily deployed avoiding members such as hoses, cords, and wires deployed across the traveling machine body and the paddy field work device.

A sixth invention is the invention according to any one of the first to fifth inventions,
The mudguard cover is formed with a notch or an opening through which an operation member provided in the paddy field work device passes.

  According to the above configuration, a mudguard cover having a large mud receiving area can be arbitrarily provided by avoiding operation members such as various adjusting levers provided in the paddy field working apparatus.

A seventh invention is the invention according to any one of the first to sixth inventions,
The mudguard cover is provided with a support portion for a member linked to the paddy field work device.

  According to the said structure, a dedicated holding member and clamp means can be decreased by receiving and supporting the movable members, such as hoses, cords, and wires.

According to an eighth invention, in any one of the first to seventh inventions,
The mudguard cover is formed of a resin material, and a thin cutting line for adjusting the outer shape is formed.

  According to the above configuration, a plurality of models of mudguard covers or a pair of left and right mudguard covers can be formed from a common material, which is effective in reducing mold costs.

  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 6 is connected to and supported by the rear end lower portion of the lifting / lowering link mechanism 5 so as to be able to roll around a fulcrum p in the front-rear direction. The fertilizer application device 7 is mounted.

  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 so as to level the planting location of the surface T, and a pair of left and right forming a running reference line for the next stroke on the surface T Marker 11, etc. are provided.

  The seedling planting device 6 is provided with a rectangular tube-shaped planting frame 12 that is formed by extruding aluminum material at the front lower portion, and this planting frame 12 is provided with a feed case 13 at the lower rear end of the elevating link mechanism 5. It is connected through rolling freely. 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 four places on the rear surface of the planting frame 12 in a rear 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. 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 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 projects to the toe side so that the seedling held is separated from the planting claw 18 and pushed into the ground. It is configured.

  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 horizontally and horizontally 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. As shown in FIG. 5, the planting depth adjusting lever 28 is a plate material refracted in a U-shaped cross section and is configured to have high bending strength in the swinging operation direction, so that the grounding load of the entire leveling float 10 can be strengthened. It can be locked and supported.

  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 31 provided on the seedling table 8 is driven by a constant pitch. The horizontal axis power extracted from the feed case 13 is input to the front portion of each planting case 14.

  A support column 32 is erected from the left and right sides of the planting frame 14, and a plurality of guide rollers 34 are provided on a horizontal frame 33 that is installed and fixed over the support column 32, and these guide rollers 34 are provided on the upper rear surface of the seedling platform 8. The upper part of the seedling rest base 8 that is engaged with the horizontally connected guide frame 35 and maintained in the forwardly 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 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 swingable by switching 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.

  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.

  A pair of left and right mudguard covers 55 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. This mudguard cover 55 is formed into a plate shape by blow molding a resin material, and as shown in FIG. 7, the left and right portions of the upper end portion are bolted and fixed to the horizontal frame 33 via brackets 52, The left and right portions of the lower portion of the mudguard cover 55 are fastened together using a through bolt 53 that connects the planting case 14 to the planting frame 12. The through bolt 53 is fastened to a receiving plate 54 having an L-shaped cross section provided along the planting frame 12.

  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 (side floats) 10 to a high position above the rear wheel shaft center x, and the left and right leveling floats. 10 is formed in a wide width overlapping from the front. The upper and lower intermediate portion 55 a of the mudguard cover 55 is slightly bulged forward, and the electric motor 44 of the marker 11 is disposed behind the upper and lower intermediate portion 55 a of the mudguard cover 55. Most of the mud splashed off from the rear wheel 2 is received in the range extending downward from the upper limit intermediate portion 55a of the mudguard cover 55 and flows down.

  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 (side float) 10 located behind the mudguard cover 55, preferably the leveling float 10 It is comprised so that it may be located in a position lower than an upper end, and it is prevented that mud splashes back from between the lower end of the mudguard cover 55 and the leveling float 10.

  Notches 56 are formed at appropriate positions around each mudguard cover 55. The supply hose 48 is inserted into the notch 56 and is locked inside the notch 56 by the elastic restoring force of the hose itself so that it is supported without being unjustly displaced. In this case, instead of the notch 56, an opening may be formed in the upper portion of the mudguard cover 55, and the supply hose 48 may be inserted through the opening.

  The left and right mudguard covers 55 are manufactured using symmetrical cover materials 55A formed of the same mold. A thin cutting line e is formed on the cover material 55A, and the outer shape can be adjusted by cutting along the thin cutting line e. In this example, the left and right mudguard covers 55 It has been adjusted to a different shape.

  [Other Examples]

  (1) As shown in FIG. 9, when the mudguard cover 55 is formed wider, the planting depth adjustment lever 28 and the seedling removal amount adjustment lever 23 which are operation members provided in the seedling planting device 6 are inserted. A cutout 57 to be formed may be formed in the mudguard cover 55.

  (2) An opening corresponding to the lever guide 24 (notch 25) is formed in the mudguard cover 55 as a mudguard cover 55 up to the notch 57 instead of the notch 57 for inserting the member. The planting depth lever 28 and the seedling removal amount adjusting lever 23 may be inserted.

  (3) The mudguard cover 55 may be mounted on the rear end portion of the lift link mechanism 5 for implementation.

  (4) The upper portion of the mudguard cover 55 may be extended above the guide frame 35 so that the mudguard cover 55 covers the guide frame 35.

  (5) In the seedling planting device 6 that does not include the planting frame 12, the lower portion of the mudguard cover 55 may be connected to the front portion of the feed case 13 or the planting case 14.

  (6) From the rear wheel fender 60 (see FIG. 1) provided at the left and right rear portions of the traveling machine body 3, a mudguard cover 55 that covers the rear wheel 2 from the rear is extended to near the surface T, and a seedling planting device (paddy field work) The mudguard cover 55 can be moved up and down in conjunction with the raising and lowering of the device 6, and the lower end of the mudguard cover 55 can be positioned as close to the field surface T as possible without being immersed in the field surface T.

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 Cross section of planting depth adjustment lever Front view showing mudguard cover before external adjustment 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 view of a seedling planting device equipped with a mudguard cover of another embodiment

Explanation of symbols

2 Rear wheel 3 Traveling machine 6 Paddy field work device (seed planting device)
9 Planting mechanism 10 Leveling float 23 Operating member (seedling amount adjustment lever)
28 Operation member (planting depth adjustment lever)
55 Mudguard cover 56 Notch 57 Notch e Thin wall cutting line x Rear wheel shaft center

Claims (8)

In the paddy field 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 near the paddy field to the upper part of the rear wheel shaft center, and this mudguard cover is moved up and down of the paddy field work device. Accordingly, the paddy field work machine is configured to move up and down in the same direction.   The paddy field work machine according to claim 1, wherein the mudguard cover is attached to the paddy field work device.   The paddy field work device is a seedling planting device in which a leveling float is arranged so that the height of the planting mechanism can be adjusted, and in the shallowest planting state in which the leveling float is adjusted downward relative to the planting mechanism, the mudguard cover The paddy field work machine according to claim 2, wherein a lower end is configured to be positioned at substantially the same height as an upper end of the leveling float positioned behind the lower end.   The paddy field work machine according to any one of claims 1 to 3, wherein the mudguard cover is disposed in a pair of left and right so as to face the rear wheel.   The paddy field work machine according to any one of claims 1 to 4, wherein the mudguard cover is formed with a notch or an opening through which a member deployed across the traveling machine body and the paddy field work device passes.   The paddy field work machine according to any one of claims 1 to 5, wherein the mudguard cover is formed with a notch or an opening through which an operation member provided in the paddy field work device passes.   The paddy field work machine according to any one of claims 1 to 6, wherein the mudguard cover is provided with a support portion for a member linked to the paddy field work device.   The paddy field work machine according to any one of claims 1 to 7, wherein the mudguard cover is formed of a resin material, and a thin cutting line for external shape adjustment is formed.

Images