JP2011120482A - Paddy working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paddy working machine having excellent operability and maintainability of a regulation mechanism for regulating the amount of an agricultural material delivered. <P>SOLUTION: The paddy working machine includes: a link mechanism 21 mounted at the back of a machine body 1 provided with a driver's seat 12; an operating implement 3 having a feeding part 81 for feeding the agricultural material to the paddy surface, and connected to the link mechanism 21; and an agricultural material feeder 2 loaded above a step 20 of the machine body 1 in back of the driver's seat 12 for delivering the agricultural material through a hose 82 to the feeding part 81. In the paddy working machine, the regulation mechanism 70 for changing the transmission ratio of power of an engine 16, transmitting thereof to the agricultural material feeder 2, and regulating the amount of the agricultural material delivered is installed on either of a right side face and a left side face of the agricultural material feeder 2 and above the step 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a paddy field machine equipped with an agricultural material supply device that supplies agricultural materials such as fertilizers and seedlings to a rice field.

  As a conventional paddy field work machine provided with an agricultural material supply device, for example, a rice transplanter (paddy field work machine) in which a fertilizer application device (agricultural material supply device) of Patent Document 1 is mounted behind a driver's seat is known. This fertilizer applicator is provided with a feeding mechanism for feeding fertilizer out of a fertilizer hopper. The feeding mechanism is driven by the power from the transmission case being transmitted to the feeding operation shaft through the fertilizer application drive shaft, the crank arm, the operation rod, and the operation arm. By the reciprocating vertical movement of the operation rod, the operation arm is swung, and the feeding operation shaft is rotationally driven.

  Further, in order to adjust the feed amount of the fertilizer, the linkage position between the operation arm and the linkage rod can be changed to a plurality of positioning recessed portions provided on the lower surface of the operation arm. With such a configuration, the stroke amount of the reciprocating swing of the operating arm can be changed without changing the stroke amount of the vertical reciprocating motion of the operating rod. As a result, the rotation angle of the feeding operation shaft is changed, and the fertilizer is changed. The amount of feed can be adjusted.

JP 2007-267615 A (see FIGS. 1, 2, 3, and 11)

  In the rice transplanter of Patent Document 1, an adjustment mechanism including an operation arm, an operation tool, and the like is disposed below the fertilizer hopper and in the vicinity of the center in the body width direction. Therefore, when a seedling planting device is mounted behind the fertilizer, there is room for improvement in terms of operability when adjusting the feed amount (that is, changing the linkage position between the operation arm and the linkage rod) from the driver's seat. was there. Moreover, since the adjustment mechanism protrudes rearward from the fertilizer application apparatus, mud is easily applied to the adjustment mechanism during farm work, and there is a problem in terms of maintenance.

  This invention is made | formed in view of the above problem, and it aims at providing the paddy field machine excellent in the operativity and maintenance property of the adjustment mechanism which adjusts the feed amount of agricultural materials.

  The first characteristic configuration of the paddy field working machine according to the present invention includes a link mechanism that is attached to the back surface of the machine body having a driver's seat, and a supply unit that supplies agricultural materials to the field surface, and is connected to the link mechanism. In a paddy field work machine having a device and an agricultural material supply device that feeds agricultural material to the supply section via a hose and is mounted above the steps of the machine body behind the driver's seat, the transmission ratio of engine power And an adjustment mechanism that is transmitted to the agricultural material supply device to adjust the amount of the agricultural material fed is provided on either the right side or the left side of the agricultural material supply device and above the step. In the point.

  As in the first feature configuration, when the adjustment mechanism is provided on either the right side or the left side of the agricultural material supply device, the worker sits in the driver's seat when changing the feed amount of agricultural material during paddy field work. Since the adjustment mechanism can be operated while the operation is being performed, it is not necessary to interrupt the work and work efficiency is improved. In addition, even when an operator is getting off the aircraft, if the adjustment mechanism is on either the right side or the left side of the agricultural material supply device, the adjustment mechanism can be easily reached. Improves. Furthermore, since the adjustment mechanism is located above the step, mud splashed up from the surface is blocked by the step, and mud splashing on the adjustment mechanism can be suppressed.

  The second characteristic configuration is that the adjusting mechanism is arranged in front of the rear end portion of the agricultural material supply apparatus.

  As in the second feature configuration, by arranging the adjustment mechanism in front of the rear end portion of the agricultural material supply apparatus, it is possible to prevent interference between the work device mounted on the rear of the agricultural material supply apparatus and the adjustment mechanism. it can. For this reason, the operability and maintainability of the adjustment mechanism are improved. Further, according to this arrangement, since the adjustment mechanism has fewer portions protruding rearward than the step, it is possible to further expect the effect of suppressing mud splashing.

  The third characteristic configuration includes a swinging member that swings around the fulcrum in a balance-like manner, and a moving member that changes the position of the fulcrum along the longitudinal direction of the swinging member, and the engine power reciprocates. An input end that is input as one end of the swing member, and an output end that transmits the reciprocating motion to the agricultural material supply device is provided at the other end of the swing member, The adjustment mechanism is constructed.

  According to the third feature configuration, the ratio between the input and the output changes only by moving the moving member and changing the fulcrum position of the swinging member, and the transmission ratio between the input end and the output end is changed continuously or in stages. Therefore, it can be easily changed. For this reason, the operability of the adjusting mechanism is improved, and the degree of freedom in adjusting the amount of feed of agricultural materials is high.

  A fourth characteristic configuration is that the adjusting mechanism is arranged so that the longitudinal direction of the swinging member is along the front-rear direction of the airframe.

  According to the fourth characteristic configuration, the swinging member and the moving member are in a state along the right side surface or the left side surface of the agricultural material supply apparatus, so that the protrusion of the adjustment mechanism in the machine body width direction can be suppressed. For this reason, the storage property to a garage or a transporter of a paddy field work machine is not deteriorated.

  The fifth characteristic configuration is arranged on the front side of the agricultural material supply apparatus, and a ventilation duct for supplying a conveyance wind for sending agricultural material to the supply unit to the agricultural material supply apparatus, and a rear side of the agricultural material supply apparatus And a discharge duct for recovering agricultural material from the agricultural material supply device, and on the side where the side surface opposite to the side surface of the agricultural material supply device provided with the adjusting mechanism is located, A connecting duct for connecting the discharge duct is provided.

  The connecting duct is for supplying the conveying air from the blower duct to the discharge duct and using the conveying air for collecting agricultural materials. As in the fifth feature configuration, when the connecting duct for connecting the air duct and the discharge duct is provided on the side where the side opposite to the side of the agricultural material supply apparatus provided with the adjusting mechanism is provided, the connecting duct and the adjusting mechanism Can be arranged without interfering with each other and is preferable in terms of weight balance.

  The sixth characteristic configuration is a work state in which the conveying air is supplied from the air duct to the agricultural material supply apparatus and the flow of the conveying air from the air duct to the discharge duct is interrupted, and the air is conveyed from the air duct to the farming material supply device. There is a shutter that can be switched to a collection state to be sent to the discharge duct via a connecting duct.

  As in the sixth feature configuration, by providing a shutter that can be switched between the working state and the collection state, it is possible to easily obtain a state in which the conveyance air is used at the time of supply and collection of agricultural materials by operating the shutter. Thus, the work efficiency is improved in both the work state and the recovery state.

1 is an overall side view of a rice transplanter according to an embodiment of the present invention. 1 is an overall plan view of a rice transplanter according to an embodiment of the present invention. It is a front view which shows the whole fertilizer application. It is a top view which shows arrangement | positioning of a feeding mechanism. It is a side view which shows an adjustment mechanism. It is a side view explaining operation | movement of an adjustment mechanism. It is a side view explaining operation | movement of an adjustment mechanism. It is sectional drawing of the adjustment mechanism in the VIII-VIII plane of FIG. It is sectional drawing of the adjustment mechanism in the IX-IX plane of FIG. It is a top view which shows the detail of a display part. It is the schematic which shows the flow of the conveyance wind in a working state. It is the schematic which shows the flow of the conveyance wind in a collection | recovery state. It is sectional drawing which shows the detail of a feeding mechanism. It is a side view which shows operation | movement of the operation lever which opens and closes a shutter. It is sectional drawing explaining the drive switching structure of a delivery roll. It is a side view which shows the open state of a feeding case. It is an enlarged view which shows the projection part provided in the connection part of the discharge duct. It is an enlarged view which shows the introduction member attached to the ventilation duct. It is an enlarged view which shows operation | movement of the connection shutter provided in the connection duct. It is an enlarged view which shows operation | movement of the branch shutter provided in the ventilation duct. It is a side view which shows the adjustment mechanism which concerns on another embodiment of this invention.

  Hereinafter, as an example of an embodiment of a paddy field machine according to the present invention, a rice transplanter provided with a fertilizer application will be described.

〔overall structure〕
As shown in FIGS. 1 and 2, the paddy field working machine according to the present embodiment includes a control unit 11 equipped with a steering handle 10 and the like and a driver's seat 12 on a driving unit step 18 of the body 1. The airframe 1 includes a pair of left and right front wheels 14 and a rear wheel 15 that can be steered. An engine 16 and a transmission case 17 are disposed on the front side of the body frame 13. A front auxiliary step 19 that forms a continuous step surface with the operation unit step 18 is provided on both outer sides of the operation unit step 18, and a reserve seedling table 22 is installed on both outer sides thereof. Further, the rear auxiliary step 20 is disposed so as to urge backward from the vicinity of the rear end of the front auxiliary step 19.

  A fertilizer application device 2 (agricultural material supply device) for supplying fertilizer (agricultural material) is disposed behind the driver's seat 12 and above the rear auxiliary step 20. A link mechanism 21 having a lift cylinder 21 a is connected to the rear surface of the machine body 1 so as to be movable up and down, and a seedling planting device 3 (working device) is mounted on the rear end side of the link mechanism 21. The fertilizer fed from the feeding mechanism 32 of the fertilizer applicator 2 is supplied to the rice field from the grooving device 81 (feeder) of the seedling planting device 3 through the hose 82.

[Seedling planting equipment]
As shown in FIG.1 and FIG.2, in this embodiment, the seedling planting apparatus 3 is comprised by 8 row planting. Four planting transmission cases 83, a rotation case 84 supported rotatably on the left and right sides of the planting transmission case 83, planting claws 85 provided at both ends of the rotation case 84, five grounding floats 86, And a seedling stand 87 or the like. In the vicinity of the lateral side of the seedling planting location by each planting claw 85, one groover 81 attached to the grounding float 86 is arranged, and a hose 82 is connected to the upper end portion thereof. The fertilizer fed from the feeding mechanism 32 is supplied to the rice field from the grooving device 81 through the hose 82.

[Fertilizer]
As shown in FIG. 3, the fertilizer application device 2 includes a hopper 31 that stores fertilizer and four feeding mechanisms 32 that are arranged below the hopper 31. The hopper 31 is a container made of transparent resin for storing fertilizer, and is configured so that the fertilizer can be input by opening a lid attached to the upper part. In the case of the present embodiment, the hopper 31 has a substantially rectangular parallelepiped shape having a long side along the body width direction, and the interior is partitioned into four rooms. Feeding mechanisms 32 are arranged at four positions at positions corresponding to these rooms, and fertilizer is fed from the hopper 31 to the feeding mechanism 32.

  The hopper 31 is fixed to the hopper support frame 33. As shown in FIG. 4, the hopper support frame 33 includes a front side frame 33 a that supports the front and side surfaces of the hopper 31, a rear frame 33 b that supports the rear surface, and an auxiliary frame that supports the vicinity of the boundary of each room of the hopper 31. 33c.

  As shown in FIG. 13, the feeding mechanism 32 includes a feeding case 34 and a feeding roll 37. The feeding case 34 includes an upper feeding case 35 and a lower feeding case 36, and the fertilizer stored in the hopper 31 flows into the upper feeding case 35 connected to the hopper 31. The feeding roll 37 is disposed at a boundary portion between the upper feeding case 35 and the lower feeding case 36, and a large number of recesses 37 a for entering fertilizer are formed on the outer periphery of the feeding roll 37 along the circumferential direction. When the feeding shaft 65 rotates clockwise in FIG. 13, the fertilizer in the recess 37 a is sent to the lower feeding case 36. At this time, since the fertilizer that has not entered the recess 37a is not sent to the lower feeding case 36 by the brush 38 for grinding, a certain amount of fertilizer that has entered the recess 37a can be fed. The feeding case 34 is made of a transparent material made of resin, and the inside can be visually recognized from the outside.

  The air blowing part 36 a provided on the front side (the right side in FIG. 13) of the lower end part of the lower feeding case 36 is connected to the air blowing duct 101 and sends the conveying air from the air blowing duct 101 to the lower feeding case 36. Moreover, the conveyance part 36b provided in the rear side (left side of FIG. 13) of the lower end part of the lower extension case 36 is connected with the hose 82 for conveying a fertilizer to the grooving device 81 of the seedling planting apparatus 3. . By comprising in this way, the fertilizer sent to the lower delivery case 36 from the upper delivery case 35 via the delivery roll 37 is sent to the hose 82 without a stagnation by the conveying wind from the air duct 101, and the groove forming device 81 Is supplied to Tanabe.

  A discharge port 35a is provided on the rear side of the upper feeding case 35, and a switching plate 39 is swingably attached around the horizontal axis. The discharge port 35 a is connected to the connection portion 102 a of the discharge duct 102. During normal rice transplanting work, the switching plate 39 is maintained in the closed state shown by the solid line in FIG. 13, and the fertilizer is not discharged to the discharge duct 102 but is fed to the lower feeding case 36 through the feeding roll 37. On the other hand, when recovering the fertilizer from the hopper 31 after completion of the rice transplanting operation, etc., if the switching plate 39 is operated to the open state shown by the dotted line in FIG. 13, the fertilizer remaining in the hopper 31 enters the discharge duct 102 from the discharge port 35a. Discharged. At this time, the step portion 102b formed in the connecting portion 102a so that the side of the discharge duct 102 is lowered makes it easy for the fertilizer to be discharged and prevents the fertilizer from flowing backward from the discharge duct 102 to the upper feeding case 35 by the conveying wind. To do. The planar arrangement of the discharge duct 102 and the switching operation of the switching plate 39 will be described later.

  As shown in FIG. 16, the upper feeding case 35 and the lower feeding case 36 are configured to be splittable. The dividing surface becomes higher from the rear side (left side in FIG. 16) to the front side (right side in FIG. 16) in a side view, and coincides with the inclined surface Y that forms the lower end portion of the upper feeding case 35. The upper feeding case 35 and the lower feeding case 36 are connected by engaging engagement holes 35b formed in the upper feeding case 35 and engagement pieces 36c formed in the lower feeding case 36. Open so that the front side of the lower feeding case 36 is lowered. In order to close the feeding case 34, the lower feeding case 36 is lifted, and the opening / closing lever 40 that is rotatably attached to the lower feeding case 36 is operated so that the engaging recess 40 a of the opening / closing lever 40 is moved. The engaging protrusion 35c of the upper feeding case 35 may be engaged.

  Conventionally, the dividing surface of the feeding case 34 has been configured to be substantially horizontal. However, if the front side of the dividing surface is increased as in this embodiment, the front opening angle when the feeding case 34 is opened is large. Therefore, internal visibility and maintainability are improved. Further, even when the feeding case 34 is in the closed state, as shown in FIG. 13, the front surface of the lower feeding case 36 becomes wider, so that the internal visibility from the outside of the feeding roll 37 is improved, and the feeding state is confirmed. Work and early detection of defects is possible.

  Based on FIG. 15, the drive switching structure of the feeding rolls 37 provided on the left and right pair of one feeding mechanism 32 will be described. The feeding shaft 65 includes a passive gear portion 65A that receives power transmission from a drive gear 63 fixed to the drive shaft 62, a cylindrical holding portion 65B that continues to the passive gear portion 65A, and a long shaft-like portion 65C. The holes formed in the feed shaft 65 are formed in a large diameter hole 65a formed in the passive gear portion 65A, a medium diameter hole 65b formed in the cylindrical holding portion 65B, and the shaft-shaped portion 65C. The small-diameter hole 65c is formed. A key member 66 for power transmission is inserted into the hole. Further, the shaft-like portion 65C is provided with a spring ball mechanism 65D for positioning the key member 66.

  The left and right intermediate boss bodies 67 fitted on the feeding shaft 65 are composed of a large-diameter cylindrical portion 67A and a small-diameter cylindrical portion 67B. Inside the intermediate boss body 67, a large-diameter holding hole 67a, a small-diameter holding hole 67b, and a key groove 67c are continuously formed. In the intermediate boss body 67 located on the passive gear portion 65A side, the large-diameter holding hole 67a fits and holds the cylindrical holding portion 65B, and the small-diameter holding hole 67b holds the shaft-like portion 65C. Further, in the intermediate boss body 67 located at the end opposite to the passive gear portion 65A side, the small-diameter holding hole 67b holds the shaft-like portion 65C inside. The key groove 67c is formed so as to form an integral groove when the left and right intermediate boss bodies 67 are brought into contact with each other, and the engaging portion 66D of the key member 66 is positioned in the groove.

  The key member 66 is a long rod-like member, and continuously forms a large-diameter disc-shaped knob 66A, a rod-like support 66B, a semicircular arc-shaped positioning portion 66C, and an engagement portion 66D. Do it. The support portion 66B is provided with display portions 66a, 66b, and 66c for positioning at three locations. Corresponding to the display portions 66a, 66b, and 66c, three engaging holes 66d, 66e, and 66f are provided on the downward surface of the positioning portion 66C. The key member 66 is positioned by the balls of the spring ball mechanism 65D engaging with the engagement holes 66d, 66e, 66f.

  Next, an operation method of the key member 66 will be described. When the display portion 66c provided at the position farthest from the knob 66A is aligned with the position corresponding to the end portion of the passive gear portion 65A, the engaging portion 66D of the key member 66 becomes the intermediate boss on the passive gear portion 65A side. Only the keyway 67 c of the body 67 is engaged. Therefore, the power transmitted to the feeding shaft 65 via the passive gear portion 65A is transmitted only to the feeding roll 37 on the passive gear portion 65A side via the key member 66 and the intermediate boss body 67 on the passive gear portion 65A side. The At this time, the ball of the spring ball mechanism 65D is engaged with the engagement hole 66f, and the positioning of the key member 66 is maintained.

  When the knob 66A of the key member 66 is held and pushed in one step and the display portion 66b positioned in the middle is aligned with the position corresponding to the end of the passive gear portion 65A as shown in FIG. 66D is engaged with the key groove 67c of both intermediate boss bodies 67. Therefore, the power transmitted to the feeding shaft 65 via the passive gear portion 65 </ b> A is transmitted to both feeding rolls 37 via the key member 66 and both intermediate boss bodies 67. At this time, the ball of the spring ball mechanism 65D is engaged with the engagement hole 66e, and the positioning of the key member 66 is maintained.

  When the knob 66A of the key member 66 is held and further pushed in, and the display 66a provided at the position closest to the knob 66A is aligned with the position corresponding to the end of the passive gear 65A, the key member 66 is engaged. The coupling portion 66D engages only with the key groove 67c of the intermediate boss body 67 located on the opposite side to the passive gear portion 65A. Therefore, the power transmitted to the feeding shaft 65 via the passive gear portion 65A is opposite to the passive gear portion 65A via the key member 66 and the intermediate boss body 67 located on the opposite side to the passive gear portion 65A. It is transmitted only to the feeding roll 37 located in the position. At this time, the ball of the spring ball mechanism 65D is engaged with the engagement hole 66d, and the positioning of the key member 66 is maintained.

  As described above, by moving the key member 66 with respect to the intermediate boss body 67, it is possible to switch to drive either one or both of the feeding rolls 37. Further, since the key member 66 is mounted in the shaft of the feeding shaft 65, it is possible to perform the withdrawal operation without receiving the fertilizer load, and the operation can be easily performed.

[Drive / Transmission mechanism]
A drive / transmission mechanism that transmits power to the feeding mechanism 32 to drive it will be described. The power for operating the feeding mechanism 32 is transmitted from the PTO shaft 51 extending rearward from the mission case 17 shown in FIG. As shown in FIG. 3, the PTO shaft 51 and the rotating arm 52 are disposed at the center of the left and right sides of the body 1 and are disposed between the left and right body frames 13. As shown in FIG. 5, the rotary arm 52 is connected to the PTO shaft 51, and the linkage rod 53 is connected to the eccentric position of the rotary arm 52 so as to extend upward. With this configuration, when the rotary arm 52 is driven to rotate by the rotation of the PTO shaft 51, the linkage rod 53 performs a reciprocating motion in the vertical direction.

  As shown in FIGS. 4 and 8, the linkage shaft 55 is disposed along the right rear side portion of the fertilizer applicator 2 and is rotatably supported by the rear frame 33b. As shown in FIGS. 4 to 8, one end of the linkage shaft 55 is connected to the upper end portion of the linkage rod 53 via the receiving arm 54, and the other end of the linkage rod 57 extending in the vertical direction via the drive arm 56. Connected to the lower end. With the above configuration, the vertical reciprocating motion of the linkage rod 53 is transmitted to the interlocking rod 57 via the receiving arm 54, the linkage shaft 55, and the drive arm 56, and the interlocking rod 57 reciprocates vertically.

  As shown in FIG. 6, the upper end of the interlocking rod 57 is connected to an input end 58a of a swinging member 58 that forms a part of an adjusting mechanism 70 described later. The swing member 58 swings the balance with the movable connecting pin 73 as a fulcrum, and reciprocates the drive rod 59 extending downward from the output end 58b opposite to the input end 58a. The lower end of the drive rod 59 is connected to the input arm 60, and the vertical reciprocating motion of the drive rod 59 is transmitted to the one-way clutch 61 through the input arm 60 as a rotational motion. When the one-way clutch 61 rotates, the drive shaft 62 whose axis is the same as that of the one-way clutch 61 rotates. As shown in FIGS. 14 and 15, the rotational motion of the drive shaft 62 is transmitted to the passive gear portion 65 </ b> A of the feed shaft 65 via the drive gear 63 to drive the feed mechanism 32.

[Adjustment mechanism]
The configuration of the adjustment mechanism 70 that adjusts the fertilizer feed amount will be described. As shown in FIGS. 8 and 9, the adjusting mechanism 70 is fixed to a bracket 95 welded to the front side frame 33 a and the rear frame 33 b that supports the hopper 31, and a fixing bracket 94 that is bolted to the bracket 95. Has been.

  As shown in FIG. 6, the adjustment mechanism 70 includes a swing member 58 and a fulcrum changing means 71 that changes the fulcrum X of the swing member 58. The swing member 58 is disposed so that the longitudinal direction thereof is along the longitudinal direction of the machine body, and the swing member 58 is formed with a long hole 58c. The vertical reciprocating motion from the interlocking rod 57 input to the input end portion 58a of the swing member 58 is transmitted to the output end portion 58b by the swinging of the balance with the connecting pin 73 fitted in the long hole 58c as a fulcrum X. The

  As shown in FIGS. 6, 7, and 9, a positioning arm 91 is rotatably attached to a fixed bracket 94 via a fixed end 91a. The other end of the positioning arm 91, the swing end 91 b, is connected to the input end 58 a of the swing member 58. The positioning arm 91 restricts the swinging member 58 from moving in the longitudinal direction of the machine body (the horizontal direction in FIGS. 6 and 7) by the vertical reciprocation from the interlocking rod 57. Since the radius of the swing locus of the input end portion 58a is larger than the radius of the swing locus of the swing end portion 91b, when the input end portion 58a swings together with the swing end portion 91b, the swing member 58 is Reciprocates slightly in the longitudinal direction of the aircraft (left and right in FIGS. 6 and 7).

  As shown in FIG. 6, when the position of the connecting pin 73 is near the longitudinal center of the swing member 58, the output side swing range N substantially the same as the input side swing range M of the input end portion 58a is the output end portion. 58b. A one-way clutch rotational angle O is obtained corresponding to the output side swing range N. On the other hand, as shown in FIG. 7, when the connecting pin 73 is moved to the output end 58 b side, the output side swing range N becomes smaller than the input side swing range M. As a result, the one-way clutch rotation angle O is smaller than in the case of FIG. 6, and the fertilizer feed amount is reduced. That is, by moving and adjusting the connecting pin 73 in the long hole 58c of the swinging member 58 and the long hole 94a of the fixed bracket 94 by the fulcrum position changing means 71, the feed amount of fertilizer can be adjusted. Yes.

  Next, the fulcrum position changing means 71 will be described. As shown in FIG. 6, the fulcrum position changing means 71 includes a screw shaft 74 having a male screw portion 74a, a moving member 75 that is screwed into the male screw portion 74a and reciprocates along the screw shaft 74, and a screw shaft 74. And an adjustment operation tool 76 that is detachably attached to the small-diameter portion 74b. When the adjustment operation tool 76 is manually turned to rotate the screw shaft 74, the moving member 75 is moved along the screw shaft 74, and the position of the fulcrum X is changed.

  The screw shaft 74 is supported by a bearing 78 so as to be rotatable around the axis W between boss portions 77 a provided on the two support brackets 77. The moving member 75 includes a cylindrical holder portion 75a externally fitted to the screw shaft 74, a suspension member 75b extending downward from the holder portion 75a, and an upward direction from the holder portion 75a. And an extending display member 75c.

  As shown in FIGS. 7 to 9, the suspension member 75 b having an inverted U shape in a cross-sectional view is configured to sandwich the swinging member 58 at the lower end portion thereof, and a connection pin 73 is attached. . The connecting pin 73 is disposed in the elongated hole 58 c of the swing member 58 and constitutes a fulcrum X of the swing member 58. Further, the upper end portion of the display member 75 c is configured to protrude from a display member hole 93 a provided on the upper surface of the mounting cover 93. As shown in FIG. 10, a scale for displaying the fertilizer feed amount is displayed on the upper surface of the attachment cover 93, and the display member 75 c indicates an appropriate value according to the position of the moving member 75.

  Next, the arrangement of the adjusting mechanism 70 will be described. In this embodiment, the adjusting mechanism 70 including the swing member 58 and the fulcrum position changing means 71 is disposed on the right side surface of the hopper 31 as can be seen from FIGS. Further, except for a part including the adjustment operation tool 76, the adjustment mechanism 70 is located below the lid portion 31c that can be freely opened and closed between the rear end portion 31a and the front end portion 31b of the hopper 31 and in the vehicle front-rear direction. Arranged along the direction. Since the adjustment operation tool 76 projects forward from the front end portion 31b and can reach the adjustment operation tool 76 even from the driver's seat 12, the adjustment operation can be performed without getting off the airframe 1.

  Further, as shown in FIGS. 1 and 2, the adjustment mechanism 70 overlaps with the rear auxiliary step 20 in a plan view (positioned on the left and right center side of the body 1 with respect to the outer end portion 20a of the rear auxiliary step 20), and the rear part. Located above the auxiliary step 20. For this reason, when the rear auxiliary step 20 plays a role of mudguard, an effect that mud or the like scattered from the rice field is less likely to be applied to the adjusting mechanism 70 is also obtained.

[Winding / conveying means]
The conveying wind generating means and conveying means used for supplying or collecting fertilizer will be described. As shown in FIG. 1, the electric blower 104 serving as a wind generating means is disposed below the driver's seat 12. Further, as shown in FIG. 2, the intake port 105 a of the introduction duct 105 for introducing outside air is disposed in the vicinity of the engine 16 and behind the muffler 25. By arrange | positioning in this way, the heat | fever from the engine 16 and the exhaust heat from the muffler 25 are attracted | sucked, the fertilizer is dried with conveyance wind, and the effect of accelerating | stimulating conveyance of a fertilizer can be anticipated.

  The conveying wind introduced from the introduction duct 105 is conveyed to the blower duct 101 by the electric blower 104 as shown in FIG. The air duct 101 includes a right air duct 101a, a left air duct 101b, and a branch duct 101c, and is disposed on the front side (lower side in FIG. 11) of the feeding mechanism 32. The right and left air ducts 101a and 101b are connected to the branch duct 101c, and the feeding mechanisms 32 are connected to the right and left air ducts 101a and 101b. Further, the branch duct 101c is provided with a branch shutter 106 that can allow and block the inflow of the conveyance air from the branch duct 101c to the right blower duct 101a.

  The discharge duct 102 used at the time of fertilizer recovery is disposed on the rear side (upper side in FIG. 11) of the feeding mechanism 32 and is connected to each feeding mechanism 32. A recovery port 102c for recovering the fertilizer is provided at the right end of the discharge duct 102 (left side in FIG. 11). The air duct 101 and the discharge duct 102 are connected by a U-shaped connecting duct 103 in a plan view at the left end of each duct (on the opposite side to the right side surface of the hopper 31 in which the adjusting mechanism 70 is disposed) ( (See FIGS. 2 and 3). The connection duct 103 is provided with a connection shutter 107, which can switch between permitting and blocking of the inflow of the conveying air.

  As shown in FIG. 11, the switching plate 39, the branch shutter 106, and the connecting shutter 107 attached to the discharge port 35 a of the feeding mechanism 32 are opened and closed simultaneously by operating the switching lever 26 and rotating the switching shaft 27. It is configured to be switched. Since the switching lever 26 is provided in the vicinity of the collection port 102c, the operator can operate the switching lever 26 while confirming the state of collecting fertilizer.

  FIG. 14 shows the details of the opening / closing operation of the switching plate 39. The switching lever 26 is provided at the right end of the switching shaft 27 (see FIG. 11), and a plurality of switching arms 28 are fixed to the switching shaft 27. A spring 24 is provided between the switching lever 26 and the front side frame 33a. A spring rod 29 is provided between the switching arm 28 and the switching member 30.

  As shown in FIG. 14, when the switching lever 26 is operated from the work position indicated by the solid line to the recovery position indicated by the dotted line, the switching arm 28 is rotated to the position indicated by the dotted line, and the spring rod 29 connected to the switching arm 28 is moved. The switching member 30 is rotated. As a result, the switching plate 39 interlocked with the switching member 30 is opened. Note that a tensile force by the spring 24 is constantly applied to the switching lever 26, and when the switching lever 26 is between the collection position and the work position, either the collection position or the work position is determined by the tension force. It is configured to be selected alternatively.

  Next, the operation of the connecting shutter 107 will be described with reference to FIG. When the switching lever 26 is operated to the recovery position, the rotation arm 45 is rotated by the rotation of the switching shaft 27, and the operation rod 46 connected to the rotation arm 45 is moved from the solid line to the position indicated by the dotted line. Then, the operation arm 47 connected to the operation rod 46 rotates about the rotation shaft 47a, and the connection shutter 107 fixed to the rotation shaft 47a enters an open state indicated by a dotted line.

  Similarly, the operation of the branch shutter 106 will be described with reference to FIG. When the switching lever 26 is operated to the recovery position, the rotation arm 41 is rotated by the rotation of the switching shaft 27, and the operation rod 42 connected to the rotation arm 41 is moved from the solid line to the position indicated by the dotted line. Then, the operation arm 43 connected to the operation rod 42 rotates about the rotation shaft 43a, and the branch shutter 106 fixed to the rotation shaft 43a enters a closed state indicated by a dotted line. In other words, the branch shutter 106 can be switched from the open state to the closed state, and the connecting shutter 107 can be switched from the closed state to the open state simultaneously by the operation of opening the switching plate 39.

  As shown in FIG. 17, a triangular protrusion 102 d in plan view is formed on the connection portion 102 a that connects the discharge duct 102 to the upper feed case 35. The protrusion 102d is formed on the side surface of the connecting portion 102a which is the downstream side in the flow of the conveying air, and the conveying air flows into the upper feeding case 35, or the conveying air diffuses in the connecting portion 102a to create a vortex. Is prevented.

  As shown in FIG. 18, an introduction member 108 is attached to a location where the blower 36 a of the feed mechanism 32 and the blower duct 101 are connected. The introduction member 108 includes a bowl-shaped introduction portion 108 a that protrudes into the air duct 101. The introduction part 108a is arranged so that the opening is directed to the upstream side of the air duct 101, and is configured so that the conveying air can easily flow from the air duct 101 into the air blowing part 36a.

  At the time of rice transplanting work (working state), the switching lever 26 is maintained at the working position, and as shown in FIG. 11, the switching plate 39 is closed, the branch shutter 106 is opened, and the connecting shutter 107 is closed. To do. Then, although the conveyance wind from the electric blower 104 is sent to the right side air duct 101a and the left side air duct 101b, it is not sent to the discharge duct 102 by the connecting shutter 107. For this reason, a conveyance wind is sent to the feeding mechanism 32 from the ventilation duct 101, and is utilized in order to accelerate | stimulate the fertilizer supply to a rice field.

  On the other hand, during fertilizer recovery (recovery state), the switching lever 26 is maintained in the open position, and as shown in FIG. 12, the switching plate 39 is opened, the branch shutter 106 is closed, and the connecting shutter 107 is opened. State. Then, the conveyance air from the electric blower 104 is not sent to the right side air duct 101a, but is sent only to the left side air duct 101b. Since the connecting shutter 107 is open, the conveying air sent to the left air blowing duct 101 b is sent to the discharge duct 102 via the connecting duct 103. Further, since the switching plate 39 is open, the fertilizer is discharged from the feeding mechanism 32 to the discharge duct 102. As a result, the fertilizer discharged to the discharge duct 102 is carried to the fertilizer recovery port 102c by the conveying wind, and the fertilizer can be easily recovered.

[Other Embodiments]
In the above-described embodiment, it is necessary to manually rotate the adjusting operation tool 76 of the adjusting mechanism 70 in order to adjust the feed amount of the fertilizer. However, as shown in FIG. It is good also as a structure driven by rotation. At this time, if the drive switch of the drive motor 99 is provided in the control unit 11, the amount of feeding can be changed without interrupting the rice transplanting operation, which is a more preferable embodiment. Instead of the driving motor 99, a hydraulic cylinder or an electric cylinder may be used. FIG. 21 also shows the adjustment operation tool 76 and the display member 75c, but these are used as emergency means when a problem occurs in the drive motor 99.

  In general, the proper fertilizer amount is defined by the weight per piece. When the adjustment mechanism 70 is manually operated, it is difficult to correct the feeding amount while continuing the rice transplanting work even if the fertilizer application amount deviates from the appropriate value. However, if the feed amount can be adjusted with the drive switch provided in the control unit 11 as described above, the fertilization amount can be appropriately adjusted without interrupting the rice transplanting work.

  Moreover, you may provide the scale which detects the variation | change_quantity of the fertilizer in the hopper 31, or a residual amount sensor. The weight of the fertilizer remaining in the hopper 31 can be obtained by reading the volume of the fertilizer from the scale or the remaining amount sensor and multiplying it by the specific gravity. If the remaining weight is subtracted from the amount of fertilizer initially charged and divided by the work area calculated from the wheel rotation speed, etc., the fertilizer amount (weight) per one hit before that can be obtained. In order to correct the difference between the fertilizer application amount and the appropriate fertilizer application amount, an accurate fertilization operation can be performed by automatically driving the drive motor 99 to adjust the feeding amount or performing manual adjustment. As a result, it is expected that the amount of fertilization will not be uneven and the growth of the crop will be improved.

  As another embodiment, the adjustment mechanism 70 may be provided on the left side surface of the hopper 31, the connection duct 103 may be provided on the right side, and the electric blower 104 is not near the center in the vehicle width direction, but on the right side or left side of the hopper 31. You may arrange | position near the downward direction of a surface. In this case, it is preferable in terms of weight balance to dispose the electric blower 104 on the side opposite to the side where the adjusting mechanism 70 is disposed.

  The present invention provides not only a paddy field work machine equipped with a seedling planting device, but also a direct sowing device that directly applies seed pods to a rice field, a liquid supply device that applies liquid fertilizer, a seed spreader used for a chemical spraying device or a seedling raising device. It can also be applied to the installed paddy field machine.

1 Airframe 2 Fertilizer application equipment (agricultural material supply equipment)
3 Seedling planting device (working device)
DESCRIPTION OF SYMBOLS 12 Driver's seat 16 Engine 21 Link mechanism 31 Hopper 32 Feeding mechanism 58 Swing member 58a Input end part 58b Output end part 70 Adjustment mechanism 75 Moving member 81 Grooving device (supply part)
82 Hose 101 Air duct 102 Discharge duct 103 Connection duct 106 Branch shutter (shutter)
107 Connecting shutter (shutter)
X fulcrum

Claims (6)

A link mechanism attached to the back of the aircraft with a driver's seat;
A work unit having a supply unit for supplying agricultural materials to the rice field, and connected to the link mechanism;
It is a paddy field work machine having an agricultural material supply device that is fed out of the agricultural material to the supply unit via a hose and mounted on the rear of the driver's seat and above the steps of the machine body,
An adjustment mechanism for changing the power transmission ratio of the engine and transmitting to the agricultural material supply device to adjust the feed amount of the agricultural material, either on the right side or the left side of the agricultural material supply device, and Paddy field work machine provided above the step.   The paddy field work machine according to claim 1, wherein the adjustment mechanism is arranged in front of a rear end portion of the agricultural material supply apparatus. A swinging member that swings around the fulcrum in a scale-like manner, and a moving member that changes the position of the fulcrum along the longitudinal direction of the swinging member,
An input end for inputting the power of the engine as a reciprocating operation is provided at one end of the swinging member, and an output end for transmitting the reciprocating operation to the agricultural material supply device is provided at the other end of the swinging member. The paddy field work machine according to claim 1 or 2, wherein the adjustment mechanism is configured at an end portion.   The paddy field work machine according to claim 3, wherein the adjustment mechanism is arranged so that a longitudinal direction of the swinging member is along a front-rear direction of the machine body. An air duct that is disposed on the front side of the agricultural material supply device and supplies a conveying air for sending agricultural material to the supply unit to the agricultural material supply device;
A rear duct disposed on the rear side of the agricultural material supply device, and collecting the agricultural material from the agricultural material supply device; and
The connection duct which connects the said air duct and the said discharge duct in the side in which the side surface on the opposite side to the side surface of the said agricultural material supply apparatus which provided the said adjustment mechanism is located was provided. The paddy field work machine as described in the paragraph.   An operation state in which the conveying air is supplied from the air duct to the agricultural material supply apparatus and the flow of the conveying air from the air duct to the discharge duct is cut off, and the air is conveyed from the air duct through the connection duct. The paddy field work machine according to claim 5, further comprising a shutter that can be switched to a collection state to be sent to the discharge duct.

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