JP2008220193A - Paddy field working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paddy field working machine which enables a working device to be arranged near rear wheels, and the overall length of which can be kept short. <P>SOLUTION: In the paddy field working vehicle, the working device 6 connected to the rear of a traveling machine body 3 can be subjected to drive rolling by a rolling drive unit 16. An operation part 50 of the rolling drive unit 16 connected to the working device 6 is provided in the rear upper portion of a lifting/lowering link mechanism 5 in such a manner as to deviate to the right or left side from the center between the right and left sides of the mechanism 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a paddy field machine configured such that a work device can be driven and rolled by a rolling drive device.

  As a conventional technique, for example, as disclosed in Patent Document 1, a seedling planting device (see FIG. 1 of Patent Document 1) is connected to a rear portion of a traveling machine body via a link mechanism (L in FIG. 1 of Patent Document 1). A rice transplanter configured so that the seedling planting device can be driven by rolling by connecting A) and driving a rolling motor (52 in FIG. 3 of Patent Document 1) linked to the seedling planting device is known. It has been.

JP 2001-16929 A (see FIGS. 1 and 3)

  In the rice transplanter of Patent Document 1, the rolling motor for rolling the seedling planting device is positioned above the rolling fulcrum in the front-rear direction for rolling the seedling planting device in front view (see FIG. 3 of Patent Document 1). In the side view (see FIG. 1 of Patent Document 1), the link mechanism is disposed so as to be located at the upper rear portion of the top link (15 of FIG. 1 of Patent Document 1). Therefore, in order to prevent interference between the top link of the link mechanism and the rolling motor when the seedling planting device is lowered, the seedling planting device is arranged rearward from the link mechanism, and this seedling planting device The structure which arrange | positioned a rolling motor in the space of the rear upper part of the link mechanism formed by arrange | positioning away from was adopted.

As a result, the overhanging amount of the seedling planting device from the axis of the rear wheel of the rice transplanter (FIG. 1 2 of Patent Document 1) to the rear increases and the total length of the rice transplanter becomes longer. When loading a machine, it is necessary to secure a wide loading space, and there is room for improvement from the viewpoint of improving loading efficiency in transportation work. In addition, if the total length of the rice transplanter is increased, for example, when turning the rice transplanter at the shore, the seedling planting device is likely to hinder turning, and there is room for improvement from the viewpoint of improving workability in turning work. was there.
An object of this invention is to implement | achieve the paddy field machine which can arrange | position a working apparatus ahead near a rear wheel and can suppress the full length of a paddy field machine.

[I]
(Constitution)
A first feature of the present invention is that a work device is connected to a rear portion of a traveling machine body through a lift link mechanism so as to be lifted and lowered, and the work device is supported by the lift link mechanism so as to be capable of rolling, and the work device is driven to roll. The paddy field machine configured to be capable of driving rolling by the apparatus is to be configured as follows.
The operation unit of the rolling drive device connected to the work device is displaced from the left and right center of the lifting link mechanism to the right or left, and is provided on the upper rear portion of the lifting link mechanism.

(Function)
According to the first feature of the present invention, the operation unit of the rolling drive device is moved forward without moving upward while avoiding the lift link mechanism by shifting the lift link mechanism from the left and right center to the right or left. The working device positioned behind the rolling drive device can be disposed in front of the link mechanism. As a result, while preventing the interference between the lifting link mechanism and the rolling drive device when the working device is lowered, the working device can be disposed in front of the rear wheel, and the total length of the paddy field work machine can be kept short. it can.

(The invention's effect)
According to the first feature of the present invention, for example, when a paddy field work machine is loaded on a truck or the like, the paddy field work machine can be compactly loaded on the loading platform of the truck or the like in the front and rear, thereby improving the loading efficiency in the transportation work. Can do. In addition, for example, when the paddy field work machine is turned on the shore, the work apparatus is less likely to prevent turning, and the paddy field work machine can be turned in a small turn, improving workability in turning work. it can.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the paddy field working machine of the first feature of the present invention.
The working device is divided into three parts, a first working device located at the left and right center part of the working device, and second and third working devices located on the right and left side parts of the working device, The third working device is configured to be movable toward the first working device, and the rolling drive device is connected to the first working device.

(Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
According to the second feature of the present invention, when the second and third work devices are moved to the first work device side, the left and right side portions of the work device move to the left and right central portions of the work device, and the full width of the work device is increased. Can be changed shortly. As a result, the full width of the paddy field work machine can be changed short.

  According to the second feature of the present invention, the first working device does not move by connecting the rolling drive device to the first working device side as compared with the case where the rolling drive device is connected to the second and third working devices to be moved. In addition, the rolling drive device can be connected with a stable structure. As a result, the rolling drive device can be driven stably, and the working device can be driven in a rolling manner with high accuracy.

(The invention's effect)
According to the second feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the second feature of the present invention, for example, when a paddy field work machine is loaded on a truck or the like, the paddy field work machine can be compactly loaded on the left and right on the loading platform of the truck or the like, thereby further improving the loading efficiency in the carrying work. be able to.

  According to the 2nd characteristic of this invention, a working device can be made to track a rice field accurately, and the rolling performance of a paddy field machine can be improved. The connection structure between the first working device and the rolling drive device becomes simple, which is advantageous in terms of simplification of the structure.

[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the paddy field working machine of the first feature of the present invention.
The working device is divided into two parts, a first working device located at the left and right central portion of the working device and a second working device located on the right or left side of the working device, and the second working device is divided into two parts. The rolling drive device is configured to be movable to the first work device side, and the rolling drive device is deflected from the center of the lifting link mechanism to the side opposite to the second work device.

(Function)
According to the third feature of the present invention, the “action” described in the preceding item [I] is provided in the same manner as the first feature of the present invention, and in addition to this, the following “action” is provided.
According to the third feature of the present invention, when the second working device is moved to the first working device side, the right or left side portion of the working device is moved to the left and right central portion of the working device, and the full width of the working device is increased. Can be changed shortly. As a result, the full width of the paddy field work machine can be changed short.

According to the third feature of the present invention, for example, an auxiliary arm (for example, 35 in FIG. 4) for moving the second working device (for example, 8B in FIG. 4) to the first working device (for example, 8A in FIG. 4) side is attached. Rolling from the left and right center of the lifting / lowering link mechanism in the first working device effectively using the space on the opposite side of the second working device from the left and right center of the lifting and lowering link mechanism not attached with an auxiliary arm, etc. A drive device can be arranged. As a result, the rolling drive device can be compactly arranged on the first working device.
Compared with the case where the rolling drive device is connected to the second working device to be moved, the rolling drive device can be easily connected to the first working device which is not moved.

(The invention's effect)
According to the third feature of the present invention, the “effect of the invention” described in the preceding item [I] is provided in the same manner as the first feature of the present invention. In addition, the following “effect of the invention” is provided. ing.
According to the third feature of the present invention, for example, when a paddy field work machine is loaded on a truck or the like, the paddy field work machine can be compactly loaded on the left and right on the loading platform of the truck or the like, thereby further improving the loading efficiency in the transportation work. be able to.

  According to the 3rd characteristic of this invention, a rolling drive device can be arrange | positioned compactly, comprising the 2nd working device so that a movement to the 1st working device side is possible. The connection structure between the first working device and the rolling drive device is simplified, which is advantageous in terms of simplification of the structure.

[IV]
(Constitution)
A fourth feature of the present invention resides in the following configuration in the paddy field working machine of the second or third feature of the present invention.
A mudguard cover for catching mud scattered rearward by a rear wheel of the traveling machine body is disposed in front of the work device, and the mudguard cover is divided and disposed for each of the divided work devices.

(Function)
According to the fourth feature of the present invention, the “action” described in the preceding item [II] [III] is provided in the same manner as the second feature or the third feature of the present invention. Is provided.
According to the fourth feature of the present invention, mud scattered backward by the rear wheel is received by the mudguard cover, and adhesion to the working device is suppressed. As a result, it is possible to prevent a large amount of mud from adhering to the work device and increase the weight of the work device as a whole. Mud adheres to the sliding part of the work device and wear is accelerated, and the operating resistance increases. Thus, it is possible to prevent the drive load from increasing.

  According to the fourth feature of the present invention, when the second and third work devices (or the second work device) are moved to the first work device, the second and third work devices (or the second work device) are moved. The mudguard cover is moved by moving the mudguard cover arranged separately with the second and third work devices (or the second work device) or by removing the mud cover from the second and third work devices (or the second work device). The entire width of the working device may be changed to be shorter in a state where the second working device (or the second working device) is moved to the first working device side without protruding outward from the first working device. it can.

(The invention's effect)
According to the fourth feature of the present invention, the “effect of the invention” described in the preceding paragraphs [II] and [III] is provided in the same manner as the second feature or the third feature of the present invention. “Effect of the invention” is provided.
According to the fourth aspect of the present invention, the working device can be moved up and down stably at a predetermined speed, and the working device can be stably operated.

  According to the fourth feature of the present invention, for example, when a paddy field work machine with the second and third work devices (or the second work device) moved to the first work device side is loaded on a truck or the like, The work machine can be compactly loaded on the left and right on a loading platform such as a truck, and the loading efficiency in the transportation work can be further improved.

[V]
(Constitution)
A fifth feature of the present invention resides in the following configuration in the paddy field machine according to any one of the first to fourth features of the present invention.
The operation member of the operation unit is constituted by a pulley.

(Function)
According to the 5th characteristic of this invention, it is equipped with the "action" as described in previous clause [I]-[IV] similarly to any one of the 1st-4th characteristic of this invention. It has such “action”.
According to the fifth feature of the present invention, compared to a case where the operation member of the operation unit is constituted by an operation arm or the like, for example, a long stroke in the circumferential direction of the pulley is ensured and the operation is performed compactly up and down with respect to the rotation axis. A pulley as a member can be arranged, the operation unit of the rolling drive device can be configured vertically and compactly, and the operation unit of the rolling drive device can be arranged in a narrow space. As a result, the work device can be further disposed in front of the rear wheel, and the total length of the paddy field work machine can be further reduced.

(The invention's effect)
According to the fifth aspect of the present invention, the “effect of the invention” described in the preceding paragraphs [I] to [IV] is provided similarly to any one of the first to fourth aspects of the present invention. The following “effects of the invention” are provided.
According to the fifth feature of the present invention, for example, when a paddy field work machine is loaded on a truck or the like, the paddy field work machine can be further compactly loaded on the loading platform of the truck or the like, further improving the loading efficiency in the transportation work. Can be made. In addition, for example, when the paddy field work machine is turned on the shore, it becomes difficult for the work device to interfere with the turn, and the paddy field work machine can be turned further in a small turn, further improving workability in turning work. be able to.

  1 and 2 show an overall side view and an overall rear view of a rice transplanter as an example of a paddy field working machine according to the present invention, and FIGS. 3 and 6 show an overall front view and an overall side view of a seedling planting device 6. Indicates. As shown in FIGS. 1 to 3, this rice transplanter is configured in an eight-row planting specification, and includes a hydraulic cylinder 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. 4 is equipped with a lifting / lowering link mechanism 5 of a parallel quadruple link structure, and a seedling planting device 6 as a working device is connected to a lower part of the rear end of the lifting / lowering link mechanism 5 so as to be freely rollable around a longitudinal axis P1. Supported, a fertilizer application device 7 is mounted on the rear part of the traveling machine body 3.

  As shown in FIG. 1 to FIG. 3 and FIG. 6, the seedling planting device 6 includes a seedling stage 8 on which eight mats of seedlings are placed and reciprocated horizontally by a fixed stroke, and the seedling stage 8. 8 rotary planting mechanisms 9 that cut out seedlings one by one from the lower end of the plant and plant them on the rice field T, and five leveling floats 10 arranged in parallel so as to level the planting site of the rice field T, And a pair of left and right markers 11 that form a travel reference line for the next stroke on the surface T.

  The elevating link mechanism 5 includes a rear link 5A formed in a frame shape that supports the seedling planting device 6 so as to be able to roll, and an upper link 5B having a U-shaped cross section that is pivotally connected to the upper portion of the rear link 5A. And a square pipe-shaped lower link 5C pivotally connected to the lower portion of the rear link 5A, and is configured in a parallel quadruple link structure.

  In the lower part of the front side of the seedling planting device 6, an aluminum frame is extruded and molded into a left and right long rectangular tube-shaped planting frame 12, and this planting frame 12 is connected to and supported by the lower part of the rear end of the elevating link mechanism 5 so as to be capable of rolling. ing. A feed case 13 for transmitting power from the traveling machine body 3 is connected to the left and right center of the planting frame 12, and a planting case 14 is connected to the left and right four locations on the rear surface of the planting frame 12 in a cantilevered manner. A planting mechanism 9 is attached to the rear end of the case 14.

  Above the planting case 14, a slide rail 15 is horizontally mounted that receives and supports the lower end portion of the seedling mount 8 so as to be slidable left and right. The slide rail 15 is supported so as to be displaceable in the inclination direction of the seedling table 8. The position of the slide rail 15 is adjusted so that the seedling table 8 is inclined with respect to the planting mechanism 9. The amount of seedling removal by the planting mechanism 9 can be changed and adjusted by moving it up and down.

  A float fulcrum shaft 88 is horizontally and horizontally disposed below the front portion of the planting case 14, and the leveling float 10 is disposed at the rear ends of the five float support arms 89 projecting rearward from the float fulcrum shaft 88. It is pivotally connected so that it can swing up and down.

  The power extracted from the traveling machine body 3 is transmitted to the feed case 13 via the transmission shaft 17 that can be expanded and contracted, and the seedling placing table 8 is laterally driven by the power transmitted to the feed case 13, so that the seedling placing table 8 is driven. At each stroke end, the seedling feeding belt 18 provided on the seedling placing table 8 is driven by a constant pitch. A part of the power transmitted to the feed case 13 is taken out from the lateral transmission shaft 19 and transmitted to the base end portions of the planting cases 14 arranged in parallel.

  A support column 20 is erected from the left and right sides of the planting frame 12, and guide rollers 22 are provided at a plurality of left and right positions of a horizontal frame 21 that is installed and fixed across the left and right support columns 20, 20. The upper part of the seedling placing table 8 that is engaged with a guide frame 23 that is horizontally connected to the upper rear surface of 8 and that is maintained in a forward tilted posture is received and supported so as to be movable in the left and right and up and down directions.

  A rolling drive device 16 is provided above the rear link 5A of the elevating link mechanism 5. A cable 65 is led out from the operation unit 50 of the rolling drive device 16 to the left and right laterally outward. The buffer springs 64 are installed over the left and right portions of 21 and the left and right cables 65 are turned back and forth by the electric motor 54, so that the entire seedling planting device 6 is driven to roll around the longitudinal axis P1. It has come to be.

  The rolling drive device 16 is linked to an inclination sensor (not shown) that detects the right and left inclination of the seedling planting device 6, and the traveling machine body 3 is tilted left and right by the undulations and unevenness of the tiller so that the seedling planting device 6 When the traveling body 3 tilts following the tilt of the traveling machine body 3, the electric motor 54 is driven based on the detection result of the tilt sensor, and the seedling planting device 6 is configured to be maintained in a horizontal posture horizontal in the left-right direction. Yes.

  A balance spring 24 is stretched over the upper part of the bracket 53 fixed to the upper part of the operation part 50 of the rolling drive device 16 and the left and right side parts of the guide frame 23 on the back of the seedling stage 8. When 8 is moved laterally, the balance spring 24 opposite to the moving direction is extended, and a rolling force due to the spring tension of the balance spring 24 is applied to the seedling planting device 6, so that the weight balance due to the lateral movement of the seedling platform 8 is achieved. It is possible to automatically prevent the seedling planting device 6 from being tilted due to the change of.

  The fertilizer applicator 7 is mounted on the rear part of a driver seat 25 provided at the rear part of the traveling machine body 3, and is a fertilizer hopper 26 that stores powdered fertilizer, and a rotary delivery that feeds the fertilizer in the fertilizer hopper 26. The mechanism 27, an electric blower 30 for conveying the fed fertilizer to the grooving device 29 provided in each leveling float 10 of the seedling planting device 6 through the supply hose 28, and the conveying air from the electric blower 30 in units of two lines. A blower duct 31 and the like that are distributed and supplied to four feeding mechanisms 27 arranged in parallel are provided.

  The marker 11 is mounted on the left and right ends of the planting frame 12 so as to be able to swing up and down. The marker 11 is supported so that the posture can be changed between a working posture projecting laterally outward and a stowed storage posture. The posture can be changed by reversing.

[Folding structure of seedling stand]
4 and 5 show front views of the seedling planting device 6 in the intermediate posture and the non-working posture, respectively, and FIG. 7 shows a side view of the seedling planting device 6 in the non-working posture. As shown in FIG. 3 to FIG. 7, in the seedling placing table 8, the two seedling placing surface portions at the left end are set to the separated seedling placing table 8 </ b> B (corresponding to the second working device), and the remaining 6 items. The seedling placing surface portion of the main seedling placing stand 8A (corresponding to the first working device) is set, the main seedling placing stand 8A and the separated seedling placing stand 8B are arranged in the left and right, and the separated seedling placing stand The posture can be changed to the non-working posture in which 8B has moved to the main seedling stage 8A side. By folding the separation seedling stand 8B to a non-working posture and removing the left and right separation slide rails 15B and 15B from the fixed slide rail 15A, the entire width of the rice transplanter can be shortened. The rice transplanter can be loaded compactly on the loading platform, and the rice transplanter can be stored compactly.

  A horizontal frame 21 in the shape of a square pipe extends from the main seedling stage 8A to the separated seedling stage 8B, and the separated seedling stage 8B is connected to the horizontal frame 21 via an auxiliary arm 35. When the auxiliary arm 35 is moved from the work posture shown in FIG. 3 to the intermediate posture shown in FIG. 4, the slide movement along the separation guide frame 36 in the left-right direction is allowed, and in the intermediate posture shown in FIG. The lock device (not shown) provided in the auxiliary arm 35 is released, and the swinging operation around the axial centers of the support shaft 37 and the support shaft 38 in the vertical direction is allowed.

  The upper and lower parts of the separated seedling stage 8B are equipped with connecting tools 39, 39 provided between the separated seedling stage 8B and the main seedling stage 8A. By releasing, the connection between the main seedling stage 8A and the separated seedling stage 8B can be released.

  With the planting clutch (not shown) inserted and operated, the seedling stage 8 is moved to the end of the separated seedling stage 8B, and the seedling stage 8 is moved to the end of the separated seedling stage 8B. Then, the planting clutch is disconnected and the seedling stage 8 is stopped. In this state, the coupling tools 39 and 39 are released to separate the separated seedling placing stand 8B from the main seedling placing stand 8A, and the separated seedling placing stand 8B is slid to the left to move to an intermediate position, thereby separating the seedling placing stand. By pulling up the handle 40 mounted on the lower part of the rear surface side of 8B obliquely rearward and upward, the auxiliary arm 35 swings around the shaft center of the support shaft 37 and the support shaft 38, and the separated seedling mounting base 8B moves rearward rightward. The separated seedling placing table 8B is positioned so that the front side of the separated seedling placing table 8B comes into contact with the stoppers 41 provided on the upper and lower parts of the rear surface side of the main seedling placing table 8A. It is possible to change the posture to a non-working posture in which the seedling placement surface is parallel.

  A spring member 42 and a rod 43 are provided on the upper and lower portions on the rear surface side of the main seedling table 8A, and a bracket 48 on the upper part of the separated seedling table 8B is engaged with the spring member 42 to separate the seedling table. By pressing the lower part of 8B with the rod 43, it is possible to maintain the state in which the separated seedling stage 8B is changed to the non-working posture. It should be noted that the main seedling stage 8A and the separated seedling stage 8B are arranged in the left and right working posture by moving the separated seedling stage 8B and locking the coupling tools 39, 39 in the reverse procedure of the above-described operation method. Can return to.

[Detailed structure of sliding rail]
Based on FIG. 8, the detailed structure of the slide rail 15 is demonstrated. FIGS. 8A and 8B show a longitudinal side view and a longitudinal rear view of the sliding rail 15, respectively. FIG. 8C shows a perspective view of a connecting portion on the right side of the sliding rail 15. As shown in FIG. 8, the slide rail 15 includes a fixed slide rail 15A, and left and right separate slide rails 15B and 15B that are detachably attached to both end positions of the fixed slide rail 15A. Has been.

  On the lower surface side of both ends of the fixed sliding rail 15A, a bolt 81 having a tip connected to a plate 80 inserted into the fixed sliding rail 15A is extended downward. Is externally fitted and can be fastened and fixed with a wing nut 83 from below.

  A plate 84 is fixed to the lower surface side of the inner end of the separation slide rail 15B. The collar 82 is sandwiched between the slide rail 15 and the collar 82 at the tip of the plate 84 from the lower side. A notch portion 84a that can be tightened is formed.

  The plate 84 is sandwiched from the lower side of the fixed sliding rail 15 </ b> A and the collar 82, and the wing nut 83 is tightened so that the tightening force of the wing nut 83 presses the plate 84 upward via the collar 82. Thus, the separation slide rail 15B and the fixed slide rail 15A can be fixed. On the other hand, the separation slide rail 15B can be separated from the fixed slide rail 15A by loosening the wing nut 83 and pulling the separation slide rail 15B outward.

  In a state where the separation slide rail 15B is fixed to the fixed slide rail 15A, the plate 84 fixed to the separation slide rail 15B enters the fixed slide rail 15A side, and the plate 80 connected to the fixed slide rail 15A is separated. The plate 80 is configured to protrude from the outer end portion of the fixed sliding rail 15A so as to enter the moving rail 15B side.

  By adopting such a connecting structure of the fixed slide rail 15A and the separate slide rail 15B, the fastening force of the wing nut 83 is applied to the fixed slide rail 15A and the separate slide rail via the plate 80 and the plate 84. 15B, and the separation slide rail 15B can be stably fixed to the fixed slide rail 15A by the plate 80 and the plate 84 which are inserted into each other. As a result, the connection strength between the separation slide rail 15B and the fixed slide rail 15A can be improved, and the separation slide rail 15B is fixed to the fixed slide rail 15A (the seedling placed on the slide rail 15). It is possible to prevent the separation slide rail 15B from rattling or the like in a state where the table 8 is moved), and the durability of the slide rail 15 can be improved.

  The separation slide rail 15B separated from the fixed slide rail 15A can be transported and attached to the rice transplanter by being inserted and attached to the locking tool 85 provided on the support column 20 from above.

[Detailed structure of rolling drive]
Based on FIGS. 9-13, the detailed structure of the rolling drive device 16 is demonstrated. 12 and 13 show cross-sectional views at the position XX and the position YY in FIG. 11, respectively.

  As shown in FIGS. 9 and 10, a bracket 51 is fixed to the upper part of the rear link 5 </ b> A of the lift link mechanism 5. The bracket 51 is formed in a U-shaped cross-sectional shape and extends forward from the upper part of the rear link 5A. The width of the bracket 51 in the left-right direction is set to be wider than the width of the upper link 5B of the lifting link mechanism 5, and when the seedling planting device 6 is lowered by operating the lifting link mechanism 5, The upper link 5B of the elevating link mechanism 5 enters the side so that the bracket 51 and the upper link 5B do not interfere with each other.

  A plurality of mounting holes are machined in the bracket 51, and the operation unit 50 of the rolling drive device 16 is placed on the upper surface side of the bracket 51, and the bolts 52 are fastened and fixed from the lower side, whereby a seedling platform The rolling drive device 50 can be assembled to the bracket 51 in a narrow space in front of the bracket 8.

  As shown in FIGS. 9 to 13, the rolling drive device 16 includes a case 60, an electric motor 54, an output gear 55, a drive gear 56, a pulley 59 (corresponding to an operation member), and a cover 70. And the cable 65 and the buffer spring 64 connected to the operation unit 50. The operation unit 50 is integrally fixed to the bracket 51, and the cable 65 and the buffer spring 64 are connected. Thus, the seedling planting device 6 is configured to be able to mount the rolling drive device 16.

  In this way, by configuring the operation unit 50 to be integrally fixed to the bracket 51, for example, when assembling the rolling drive device 16, the operation unit 50 is assembled integrally, so that the rear upper part of the lifting link mechanism 5 is assembled. The work in a narrow space can be reduced, and the workability of the assembly work can be improved. Further, when maintaining the rolling drive device 16, by removing the operation unit 50 as one body, the work in a narrow space at the rear upper part of the lifting link mechanism 5 is reduced, and the workability of the maintenance work is improved. Can do.

  The case 60 is made of aluminum, and includes a motor mounting portion 61 that fixes the electric motor 54, a bearing portion 62 that supports the drive gear 56 and the pulley 59, a flange portion 63 that is fixed to the bracket 51, and the like.

  Engagement holes 61a for attaching a cover 70, which will be described later, are formed on the front surface side of the motor mounting portion 61 of the case 60. Engagement for attaching a cover 70, which will be described later, to the upper and lower portions of the bearing portion 62 of the case 60. Holes 62a and 62b are respectively formed.

  A screw portion 61b facing forward and backward is formed on the upper portion of the motor mounting portion 61 of the case 60, and a stay 53 formed into a shape that is bent in a long strip shape like a strip is formed on the screw portion 61b. Tightened and fixed. A circular opening 53 a is formed at the upper end of the stay 53, and the left and right balance springs 24 are stretched across the opening 53 a and both left and right sides of the guide frame 23.

  As shown in FIGS. 12 and 13, the electric motor 54 is fixed to the motor mounting portion 61 of the case 60 with the output gear 55 fixed to the output shaft 54 a, and the deceleration built in the electric motor 54. The rotation of the electric motor 54 is decelerated by a device (not shown) and output from the output shaft 54a. The motor mounting portion 61 of the case 60 is integrally formed with a protruding portion 61c having a shape protruding outward, and an output gear 55 is disposed inside the protruding portion 61c. A rightward opening is formed in the protrusion 61c, and the output gear 55 and a drive gear 56 (to be described later) can be engaged through the opening (see FIG. 11).

  A drive shaft 57 to which a drive gear 56 is fixed in advance by welding is rotatably supported on the bearing portion 62 of the case 60 via bearings 58 and 58, and the drive gear fixed to the drive shaft 57 is supported. A plurality of pulley mounting holes 56 a and 56 a are machined in the outer peripheral portion of 56 before welding to the drive shaft 57.

  The pulley 59 is made of resin and has two V-grooves around which the cables 65 and 65 linked to the right and left buffer springs 64 and 64 are wound. A plurality of contact portions 59 a that contact the drive gear 56 are integrally formed on the pulley 59 at an equal pitch, and a plurality of columnar connection portions 59 b that engage with the pulley mounting holes 56 a of the drive gear 56 are integrated. Molded.

  The connecting portion 59b of the pulley 59 is fitted into the pulley mounting hole 56a of the drive gear 56, the contact portion 59a of the pulley 59 is brought into contact with the outer surface side of the drive gear 56 together with the boss portion 59c, and the nut 66 is tightened from the front. By fixing, the drive gear 56 and the pulley 59 engaged with the output gear 55 fixed to the output shaft 54a of the electric motor 54 are configured to rotate integrally around the axis P2.

  As described above, the drive gear 56 is fixed to the drive shaft 57, and the pulley 59 is fitted and mounted on the drive gear 56 so that the drive gear 56 and the pulley 59 can be integrally rotated. Compared to the case where the drive shaft 57, the drive gear 56, and the pulley 59 are configured so as to be integrally rotatable using a drive shaft 57, the drive gear 56, and the pulley 59 (not shown), etc. This eliminates the need for processing and can reduce the manufacturing cost. The drive gear 56 and the pulley 59 can be easily and quickly attached to the drive shaft 57, and the workability of assembly work and maintenance work can be improved.

  A rotation gear 67 is fitted on the rear end portion of the drive shaft 57, and this rotation gear 67 is engaged with a sensor gear 69 connected to the rotation sensor 68, and the rotation sensor 68 controls the rotation speed of the drive shaft 57. It is configured so that it can be detected. The rotation sensor 68 is connected to a control device (not shown) of the rice transplanter, and the electric motor 54 can be accurately controlled by feeding back the detection result from the rotation sensor 68.

  As described above, by adopting a configuration in which the electric motor 54, the drive shaft 57, the drive gear 56, the pulley 59, and the like are mounted on the case 60, the drive gear 56 and the like are loose due to vibrations of the seedling planting device 6 and the like. Therefore, the power from the electric motor 54 can be transmitted to the pulley 59 with high accuracy, and the rolling control can be performed with high accuracy.

  The cover 70 is made of resin and is rounded to match the shapes of the pulley 59, the drive gear 56, and the protrusion 61c so that the pulley 59, the drive gear 56, and the protrusion 61c of the motor mounting portion 61 can be compactly covered from the front. It is molded into a curved shape. Notches 71 are formed on the left and right sides of the upper portion of the cover 70, and the cable 65 wound around the pulley 59 is extended from the notches 71 to the left and right so as to be linked to the buffer spring 64. Has been.

  Engagement pieces 72 protruding rearward are integrally formed at the left end of the cover 70, and engagement pieces 73 and 74 protruding rearward are integrally formed at the upper end and lower end of the cover 70, respectively. Has been.

  The engaging piece 72 of the cover 70 is engaged with the engaging hole 61a of the case 60, the engaging piece 73 at the upper part of the cover 70 and the engaging hole 62a of the case 60 are positioned, and the engaging piece 74 at the lower part of the cover 70 is positioned. And the engagement hole 62b of the case 60 are positioned, and when the cover 60 is pushed a little from the front to the rear, the engagement pieces 73 and 74 are engaged with the engagement holes 62a and 62b, respectively, and a dedicated tool or the like is used. The cover 70 can be easily and quickly attached to the case 60 with one touch.

  When the cover 70 is elastically deformed by slightly pushing the portions located slightly forward of the engagement pieces 73 and 74 of the cover 70 downward and upward, the engagement holes 62a and 62b of the engagement pieces 73 and 74 of the cover 70 are elastically deformed. When the engagement of the engagement piece 62 is released and the cover 70 is elastically deformed by pushing the portion located forward of the engagement piece 62 of the cover 70 to the right, the engagement of the engagement piece 62 with the engagement hole 61a is released. . By moving the cover 70 rearward in this state, the cover 70 can be easily and quickly removed from the case 60 with one touch without using a dedicated tool or the like.

  Although not shown, the engagement piece 72 of the cover 70 is engaged with the engagement hole 61a of the case 60, and the engagement pieces 73 and 74 of the cover 70 are fitted into the engagement holes 62a and 62b of the case 60. The direction may be set to a different direction (for example, a direction orthogonal to the side view), and when vibration due to planting work or the like acts on the cover 70, the cover 70 can be prevented from being displaced, and the cover 70 is surely secured. Can be held in the case 60, and the mounting structure of the cover 70 that is difficult to be removed by vibration such as planting work can be realized.

  As shown in FIG. 3, the right side of the elevating link mechanism 5 is such that the longitudinal axis P2 of the pulley 59 of the rolling drive device 16 is located on the right side of the longitudinal axis P1 that drives the seedling planting device 6 to roll. The operation unit 50 of the rolling drive device 16 is disposed on the rear upper part of the lifting link mechanism 5 by deviating the rolling drive device 16 from the left and right center of the lifting link mechanism 5 to the side opposite to the separated seedling stage 8B. The rolling drive device 16 is disposed on the right side of the main seedling stage 8A where the auxiliary arm 35 and the like for moving the separated seedling stage 8B to the main seedling stage 8A are not provided. Therefore, the balance spring 24 and the buffer spring 64 can be connected without difficulty, and the operation unit 50 of the rolling drive device 16 can be connected to the lift link mechanism 5 while setting the diameter of the pulley 59 large and ensuring a large operating force for pulling the buffer spring 64. It can be arranged without difficulty in the upper rear part.

[Center float mounting structure]
As shown in FIGS. 3 and 6, the leveling float 10 pivotally connected to the rear end of the float support arm 88 so as to swing up and down is composed of a center float 10A at the left and right center and two side floats 10B on each of the left and right sides. The center float 10A and the side float 10B are supported so as to be swingable up and down around the fulcrum at the rear part.

  As shown in FIGS. 14 and 15, a bracket 90 extends forward from the planting frame 12, and an angle sensor 92 is supported on the bracket 90 via a link mechanism 91 having a parallel quadruple link structure. An operation lever 93 is extended to the side of the angle sensor 92, and a sensor rod 94 is connected to the operation lever 93.

  The link mechanism 91 is connected to the planting depth adjusting lever 96 through the connecting rod 95, and the planting depth adjusting lever 96 is operated to adjust the height of the fulcrum at the rear part of all the leveling floats 10 to plant. Even if the depth is changed, the reference posture of the center float 10A is not changed.

  A bracket 97 extends forward from the planting frame 12, and a pantograph-type linkage link 98 is pivotally connected to the bracket 97. On the upper surface side of the center float 10A front part, a bracket 99 having a U-shaped vertical cross section opened upward is fixed, and through holes are formed in the left and right side plates of the bracket 99.

  The sensor rod 94 is connected to the bracket 99 together with the linkage link 98 in a state where the linkage link 98 is fitted between the left and right side plates of the bracket 99 from above, and the rotation fulcrum of the sensor rod 94 and the rotation of the linkage link 98 are connected. It is comprised so that a dynamic fulcrum may correspond. With this configuration, the sensor rod 94 can be used as a pivotal support for pivotally connecting the linkage link 98 to the bracket 99, and the structure of the bracket 99 can be simplified. Compared with the case where the sensor rod 94 and the linkage link 98 are separately pivotally connected to the bracket 99, the manufacturing cost can be reduced.

  As described above, by configuring the center float 10A and the like, when the center float 10A swings up and down around the rear fulcrum, the operation lever 93 of the angle sensor 92 is swinged, and the center float 10A is displaced up and down. The center float 10A can be made to function as a grounding sensor for automatically raising and lowering the seedling planting device 6.

[Detailed structure of mudguard cover]
As shown in FIG. 16, a mudguard cover 45 that receives mud splashed rearward from the rear wheel 2 is attached to the front portion of the seedling planting device 6 in a forward tilted posture. The mudguard cover 45 is formed in a plate shape by blow-molding a resin material, and the left and right portions of the upper end portion of the mudguard cover 45 are fixed to the seedling table 8.

  The mudguard cover 45 is divided into a main mudguard cover 45A that covers the main seedling platform 8A from the front and a separated mudguard cover 45B that covers the separated seedling platform 8B from the front. The upper part is fixed to the upper frame 76A of the main seedling platform 8A with a fixing bolt 78, and the upper part of the separation mudguard cover 45B is easily attached to and detached from the bolt fixed to the upper frame 76B of the separated seedling platform 8B via a wing nut 79. It is attached.

  When separating the separated seedling platform 8B from the main seedling platform 8A and changing the attitude of the seedling platform 8 to the non-working posture, the wing nut 79 is loosened by hand and the separation mudguard cover 45B is moved downward. The separation mudguard cover 45B can be removed from the separated seedling stage 8B, and only the separation mudguard cover 45B can be partially removed from the seedling stage 8.

  Thus, by adopting a configuration in which the mudguard cover 45 is divided into the main mudguard cover 45A and the separated mudguard cover 45B, the mudguard cover 45 is integrally formed (not shown), for example, as in the case where the mudguard cover 45 is configured integrally. The mudguard cover 45 can be prevented from protruding to the outer side of the separated seedling table 8B when the separated seedling table 8B is separated from the table 8A and the seedling table 8 is changed to a non-working posture. 45 can prevent the scattering of mud to the seedling planting device 6, and the entire width of the seedling platform 8 when the seedling platform 8 is folded can be changed to a short dimension.

[First Alternative Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], a main seedling stage 8A located at the left and right center of the seedling stage 8, and a separated seedling stage 8B located on the left side of the seedling stage 8; In the example shown in FIG. 17, the separation seedling stage 8B is configured to be movable toward the main seedling stage 8A. As shown in FIG. The seedling stage 8C may be configured to be movable to the left and right center of the seedling stage 8, and the seedling stage 8 is divided into a main seedling stage 8A, a separated seedling stage 8B, and a separated seedling stage 8C. You may divide into three and you may comprise so that the both sides of the seedling stand 8 can be moved to the left-right center part.

  In the above-mentioned [Best Mode for Carrying Out the Invention], an example is shown in which the separated seedling stage 8B is movable to the main seedling stage 8A by the auxiliary arm 35 or the like. A different structure may be adopted as a structure for moving the main seedling stage 8A toward the main seedling stage 8A. For example, as shown in FIG. 17 (B), the main seedling stage 8 and the separated seedling bases 8B and 8C are hinged 77. It is also possible to connect the separated seedling platforms 8B and 8C to the main seedling platform 8A side by connecting the separated seedling platforms 8B and 8C to the main seedling platform 8A.

  In the above-mentioned [Best Mode for Carrying Out the Invention], an example in which only the separation mudguard cover 45B can be partially removed from the seedling stage 8 has been shown, but FIG. ), The separation mudguard covers 45B and 45C may be configured to move together with the separated seedling platforms 8B and 8C. This configuration saves the trouble of attaching and detaching the separation mudguard covers 45B and 45C. Thus, the workability of the posture changing work can be improved. Further, as shown in FIGS. 17 (a) and 17 (b), a configuration in which the main mudguard cover 45A is divided into left and right parts may be adopted.

  In the above-mentioned [Best Mode for Carrying Out the Invention], an example in which the operation unit 50 of the rolling drive device 16 is deviated from the right and left center of the lifting link mechanism 5 to the right is shown in FIG. As shown in (b) and (b), a configuration may be adopted in which the operation unit 50 of the rolling drive device 16 is displaced from the left and right center of the lifting link mechanism 5 to the left.

[Second Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention] and [First Different Embodiment of the Invention], the operation unit 50 of the rolling drive device 16 includes a case 60, an electric motor 54, and an output gear 55. Although an example in which the drive gear 56, the pulley 59, and the cover 70 are provided is shown, a different configuration may be employed as the operation unit 50 of the rolling drive device 16, for example, an electric motor instead of the pulley 59. An operation arm (not shown) supported so as to be able to swing on the output shaft 54a of 54 may be employed.

[Third Another Embodiment of the Invention]
In the above-mentioned [Best Mode for Carrying Out the Invention], [First Alternative Embodiment of the Invention] and [Second Alternative Embodiment of the Invention], the seedling planting device 6 is used as an example of a paddy field machine. Although the rice transplanter provided is shown as an example, it can be similarly applied to different paddy field machines, and can also be applied to, for example, a drug spreader.

Whole left side view of rice transplanter Overall plan view of seedling planting device Whole front view of seedling planting device Front view of seedling planting device in intermediate position Front view of seedling planting device in non-working position Side view of seedling planting device Side view of seedling planting device in non-working position Detailed view showing sliding rail connection structure Side view showing structure of rolling drive Front view showing structure of rolling drive Front view showing the structure of the operation unit of the rolling drive Transverse plan view showing the structure of the operating part of the rolling drive Longitudinal side view showing the structure of the operating part of the rolling drive Side view showing the structure near the center float Longitudinal front view showing the structure near the center float Front view showing structure of mudguard cover The schematic plan view which shows the structure of the seedling mounting stand in 1st another form of implementation of invention

Explanation of symbols

2 Rear wheel 3 Traveling machine body 5 Elevating link mechanism 6 Seedling planting device (working device)
8A Main seedling stand (first working device)
8B Separate seedling stand (second working device)
16 Rolling drive unit 45 Mudguard cover 50 Operation unit 59 Pulley (operation member)

Claims (5)

A working device is connected to the rear part of the traveling machine body through a lifting link mechanism so as to be movable up and down, and the working device is supported by the lifting link mechanism in a freely rolling manner, and the working device is configured to be capable of being driven and rolled by a rolling drive device. In a paddy field machine,
The paddy field work machine provided in the rear upper part of the raising / lowering link mechanism by deviating the operation part of the rolling drive unit connected to the working device from the left / right center of the raising / lowering link mechanism to the right or left.   The working device is divided into three parts, a first working device located at the left and right center part of the working device, and second and third working devices located on the right and left side parts of the working device, The paddy field work machine according to claim 1, wherein the third working device is configured to be movable toward the first working device, and the rolling drive device is connected to the first working device.   The working device is divided into two parts, a first working device located at the left and right central portion of the working device and a second working device located on the right or left side of the working device, and the second working device is divided into two parts. The paddy field work according to claim 1, wherein the paddy field work is configured so as to be movable toward the first work device side, and the rolling drive device is displaced from the left and right center of the elevating link mechanism to the side opposite to the second work device. Machine.   A mudguard cover that catches mud scattered backward by the rear wheel of the traveling machine body is disposed in front of the work device, and the mudguard cover is divided and disposed in each of the divided work devices. The paddy field machine according to claim 2 or 3.   The paddy field work machine according to any one of claims 1 to 4, wherein the operation member of the operation unit is configured by a pulley.

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