JP5044988B2 - Rice transplanter - Google Patents

Description

  The present invention relates to a rice transplanter for planting seedlings in a field, and belongs to the technical field of agricultural machinery.

Conventionally, as shown in Patent Document 1, a marker is provided with a rotary drawing marker at the tip of the marker arm, and the marker arm is configured to be rotatable around three pivot points, the base end, the tip, and the middle. In some cases, the marker can be erected, switched to the lying posture, and switched from the standing posture to the stowed posture.
JP 2004-194579 A

The above prior art has the problem that the configuration is complicated and the cost is high because it has three pivot points.
It is an object of the present invention to solve the above problems.

In order to solve the above problems, the present invention has taken the following technical means.
That is, according to the present invention, the rotary drawing marker (20) that marks a position that serves as an indicator of the travel route of the next stroke is set up and tilted around the rotation fulcrum shaft (21) of the base end portion. It is provided with a drawing marker device (10) that can be attached to the tip of a marker arm (22) that has a bent portion, and is provided on the left and right sides of a seedling planting portion (6) having a seedling stand (11) that is inclined downward. Each of the drawing marker devices (10) and (10) is provided, and a turning shaft (23) that tilts rearward in a side view when the marker arm (22) is raised is provided in the bent portion, and the turning is performed. The rice transplanter has a structure in which the marker arm (22) is bent by the shaft (23) and the drawing marker (20) is housed in the space between the left and right widths of the seedling stage (11) and the front lower side of the seedling stage (11). A machine.
When the marker arm (22) is switched from the standing posture to the lying posture, the drawing marker (20) at the tip touches the field scene and makes a mark while being mud by rotation. When the marker arm (20) is bent, the marker (20) interferes with the seedling stage (11) when the marker arm (22) is bent around the rotation axis (23) inclined in a direction away from the seedling stage (11). Without folding, it can be folded and stored in the front space of the seedling table (11).

Further, according to the present invention, the balance spring (15) that expands and contracts with the lateral movement of the seedling stage (11) is provided on the seedling stage (11), and the base side arm (22a) of the marker arm (22) is provided. ), The distal arm (22b) of the marker arm (22) rotates about the rotation axis (23), and the marker storage lock lever (22a) is connected to the base arm (22a) of the marker arm (22). 24), and is configured to allow the drawing marker (20) to be stored by allowing the distal arm (22b) to rotate by releasing the lock state of the marker storing lock lever (24). ) Standing up and the marker arm (22) is not folded and the drawing marker (20) is not housed , the drawing marker (20) and the seedling stage (11) overlap in the side view, and the marker arm ( 22) When the state of accommodating the drawing marker (20) by bending, drawing markers (20) is a rice transplanter according to claim 1 which is configured to be positioned below the balance spring (15).
In addition to the operation of the first aspect of the present invention, when the marker arm (22) is switched from the lying posture to the standing posture, the drawing marker (20) at the tip is raised to the side of the seedling stage (11).

According to the first aspect of the present invention, the drawing marker can be accommodated in the space between the left and right widths of the seedling table and the front lower side of the seedling table, and the drawing marker device can be switched to the standing lying posture with a simple configuration. And it can be folded and stored in a position where it does not interfere with the seedling stage.
According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the drawing marker is prevented from being erroneously stored by the marker storing lock lever, and the stored drawing marker and the balance spring interfere with each other. The drawing marker can be stored without increasing the longitudinal length of the aircraft.

An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 show a riding type rice transplanter equipped with a rotary drawing marker device, and a pair of left and right front wheels 2, 2 and rear wheels 3, 3 are installed on the front and rear of a vehicle body 1 as a running wheel. Has been. A steering device having an operation box 4 and a steering handle 5 is installed at the front upper part of the vehicle body, and a four-row planting planting part 6 that can be moved up and down is provided at the rear part of the vehicle body. A rotary drawing marker device 10 is arranged on the left and right sides of the attachment. A driver's seat 9 is installed on the rear side of the control device, and an engine E that transmits power to each part of the rice transplanter is mounted below the driver's seat.

The seedling planting part 6 is mounted on the rear part of the vehicle body through a lifting link mechanism 7 so as to be able to be lifted and lowered by a telescopic operation of the lifting hydraulic cylinder 8.
In addition, the seedling planting section 6 puts mat seedlings and reciprocates left and right to supply seedlings one by one to the seedling outlets 11b,... When fed to the seedling outlet 11b, ..., the seedling feed belt 11c, ... transports the seedling downward, and then the seedling stage 11, which is inclined (the lower end is the rear end from the upper end in the side view), cuts out one seedling. Two-row planting devices 13 and 13 having a seedling planting tool 12 to be planted in the soil, floats (side floats) 14 and 14 that perform leveling while sliding on the seedling planting surface, a center float 14S, etc. I have.

  The rotational power of the engine E serving as a prime mover is input from the engine output pulley 41 to the input shaft from the input pulley 44 of the hydraulic continuously variable transmission (HST) 43 via the belt 42 as an input transmission member to the transmission case 40. The hydraulic pump is driven from this input shaft, and further transmitted from the output shaft of the HST 43 to the mission in the mission case 40. The rotational power transmitted to the mission in the case 40 is shifted by the transmission in the case 40, and then branched into traveling power and external power to be taken out. The traveling power drives the rear wheels 3 and 3 from the front wheels 2 and 2 and the rear wheel transmission shaft 45 through the gear mechanism of the rear wheel transmission case 46. The external take-out power is transmitted to the planting transmission shaft via the output transmission shaft from the transmission case 40 and the safety clutch in the safety clutch case, and further transmitted to the seedling planting unit 6 by the planting transmission shaft. At the same time, power is transmitted to the fertilizer application 47.

  The drawing marker device 10 includes a rotary drawing marker (claw wheel) 20 that marks a position that serves as an indicator of a travel route for the next stroke, and a rotation fulcrum shaft 21 that has a proximal end pivotally supported by a marker bracket 19. The marker arm 22 is a hook-shaped marker arm 22 that can stand up and down around. The drawing marker 20 is pivotally supported at the tip of the marker arm 22 and is provided by a rotating body 20b having a protruding claw 20a on the outer periphery. It is configured to touch the farm scene and rotate to make marks while muddying. The marker arm 22 includes a proximal end arm 22 a and a distal end side arm 22 b, and is configured to undulate with the pivot fulcrum shaft 21 at the proximal end as a fulcrum. It is possible to switch between an upright standing posture positioned on the side and a downhill lying posture in contact with the farm scene. Further, the hook-shaped bent portion 22c of the marker arm 22 in the upright standing state has a rotation shaft (rotation) that is inclined substantially in a direction perpendicular to the inclination direction of the seedling stage 11 in a side view and away from the seedling stage. A moving bearing body) 23 is provided, and the distal end side arm 22b is bent and rotated with respect to the proximal end side arm 22a with the rotation shaft 23 as a rotation axis. Thus, the drawing marker 20 in the standing state of the marker arm can be folded and stored in a lower (front) space within the lateral width of the seedling stage by bending and turning around the axis of the turning shaft 23.

  When the drawing marker 20 is folded and stored, if the base side arm 22a of the marker arm 22 is inserted between the protrusion claw 20a and the protrusion claw 20a of the marker 20, inadvertent rotation of the marker is prevented. And play the role of detent.

  The marker storing lock lever 24 is pivotally attached to the base side arm 22a side of the marker arm via a pivot pin 26 so as to be swingable in the front-rear direction. When the marker storing lock lever 24 is swung forward against the lock spring 27, The lock claw 25 at the distal end of the lock lever is released from the locked engagement state of the locking groove 25a with respect to the lock pin 28 fixed to the distal arm 22b, and the locked state is released. Folding storage is possible. Therefore, even if an object hits the marker storing lock lever from the advancing direction side during drawing, the locking groove 25a of the lock claw is opened forward, so that the lock lever is directed rearward. Therefore, the marker is not erroneously stored because the lock is not released.

  Further, when the rotary drawing marker 20 is folded, the rotary drawing marker 20 can be stored in the front lower space of the seedling table 11. When the marker is folded, the folded marker portion is a balance spring of the seedling table. It is located below 15. The balance spring expands and contracts with the lateral movement of the seedling platform, and when it extends, it extends to the vicinity of the folded marker part. For example, when the marker part is located at the same height as this balance spring, The springs interfere with each other, and in order to prevent this, there is no choice but to move the seedling platform backward, which inevitably increases the longitudinal length of the fuselage. In the case of this example, the marker portion can be folded and stored without increasing the longitudinal length of the body.

  In the planting operation, when the lifting hydraulic cylinder 8 is extended when the planting portion is raised, the marker wire is pulled to raise the drawing marker 20, and when the lifting hydraulic cylinder 8 is contracted when the planting portion is lowered, the marker wire is moved. The drawing marker 20 will fall back. Further, if the marker wire is regulated so as not to return by the marker solenoid, the drawing marker is held in an upright state even when the planting portion is lowered.

  The embodiment shown in FIGS. 5 and 6 is a rice transplanter that raises and lowers the seedling planting portion by pushing and pulling the hydraulic cylinder 8 for lifting and lowering, between the cylinder arms 30 and 30 of the lower link 7d in the lifting and lowering link mechanism 7 during lift. The marker solenoid 31 is arranged so as to be positioned at the center. When the hydraulic cylinder is changed from a pushing operation to a pulling operation, the marker wire rod 32 and the auto return rod 33 expand and contract downward. If these rods are stopped as high as possible in order to raise the ground clearance, the marker solenoid must be positioned higher. At that time, when the cylinder arm of the lower link is lifted, there is a problem of overlapping in the side surface direction, but it can be solved by the above configuration.

  Further, if the marker wire rod 32 and the auto return rod 33 are stopped above the lowest position Z of the hydraulic cylinder 8 even if these rods expand and contract above and below the planting portion, When lifted, there is no risk of the rod falling below the minimum ground clearance and trapping straw or other foreign objects.

  Further, in the spring case 34 of the hydraulic cylinder 8, as shown in FIG. 7, the spring case (upper) 34a has a notch groove 35a for attaching the auto return rod 33, and the spring case (lower) 34b has the notch groove 35a. By providing the notch groove 35b in which the rod 33 engages and slides, the auto return rod can be prevented from falling down and stable sliding movement can be achieved. An inclination preventing plate 36 is provided in the middle of the auto return rod 33 in order to prevent the spring case from being inclined. As shown in FIG. 8, one of the anti-tilt plates 36 is fastened and fixed with bolts 37, and the other is used as a non-rotating stopper by using a fastening means by an outer wire receiving nut 38 of an auto return rod. It is configured to be fastened together. According to this, since the inclination of the spring case is eliminated, the kneading of the auto return rod can be eliminated, and smooth sliding movement can be maintained.

  The embodiment shown in FIGS. 10 to 13 will be described. In the seedling planting portion 6, the front plate guard 50 that protects the left and right ends of the front plate 11a (see FIG. 1) of the seedling mount 11 is a front plate 11a. It is attached to the outer end portion of the front plate guard stay 51 that protrudes outward from the end portion of the front plate and is laid in the horizontal direction. The front plate guard 50 can be rotated around a front and rear axis (rotation fulcrum) P. When the front plate guard is lifted upward (A), the stand is in a state of being pressed down and grounded. It can be switched between time (when folded) and (b). That is, when the front plate guard is folded and stored downward, it can be used as a stand. If the guard is bent in the shape from the middle during the grounding stand, as shown in FIG. 13, the width of the machine body during storage can be further reduced. When used as a front plate guard, as shown in FIGS. 11 and 12, the bent portion of the U-shape is located near the outer end of the front plate guard stay 51, and the horizontal portion is outside the front plate guard stay. Can be configured.

  10 to 13, when the pivot fulcrum P of the guard is set on the inner side of the outer end of the side float 14, as shown in FIG. Can be planted close to the heel to the end of the side float.

  In the embodiment shown in FIG. 14, when the fertilizer is filled in the fertilizer tank 47 a of the fertilizer application 47 and the weight of the rice transplanter increases, the fertilizer reduction sensor 54 is set so that the spring 53 of the rear wheel independent swing arm 52 is hardened. The effect of the independent swing is made as constant as possible regardless of the amount of fertilizer.

  In the embodiment shown in FIG. 15, when the seedlings on the seedling table 11 are reduced and the seedling reduction switch 55 is turned OFF, the weight of the rice transplanter is reduced, so that the independent swing spring 53 is softened. The effect of the independent swing is made as constant as possible regardless of the amount of seedlings.

Side view of rice transplanter Same as above Side view of seedling planting part Side view of the main part of the drawing marker device Side view of essential parts of seedling planting part lifting device Top view of the main part Side view of the main part of the lifting device with seedlings Fig. 7 AA arrow view of the main part Side view of lifting hydraulic cylinder mechanism Top view of the seedling planting section Rear view of the main part Same as above Same as above Side view of rice transplanter Side view of rice transplanter

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 6 Seedling planting part 10 Drawing marker apparatus 11 Seedling stand 20 Rotation type drawing marker 21 Rotating fulcrum shaft 22 Marker arm 23 Rotating shaft (Rotating bearing body)

Claims (2)

A marker arm (22) having a bent portion capable of standing on a rotating fulcrum shaft (21) of a base end portion and having a bent portion with a rotary drawing marker (20) for marking a position serving as an index of a travel route for the next stroke The drawing marker devices (10) and (10) are respectively provided on the left and right of the seedling planting portion (6) having a seedling mounting base (11) having a rearwardly inclined inclination. And a pivot shaft (23) that tilts backward in a side view when the marker arm (22) stands up is provided in the bent portion, and the marker arm (22) is mounted by the pivot shaft (23). A rice transplanter configured to be bent and housed in the space between the left and right widths of the seedling table (11) and the front lower side of the seedling table (11). A balance spring (15) that expands and contracts with the lateral movement of the seedling stage (11) is provided on the seedling stage (11), and the tip of the marker arm (22) with respect to the base side arm (22a) of the marker arm (22). The side arm (22b) is configured to rotate about the rotation axis (23), and the marker storage lock lever (24) is provided on the base side arm (22a) of the marker arm (22). (24) Release of the locked state permits the rotation of the distal arm (22b) so that the drawing marker (20) can be stored, and the marker arm (22) is in an upright state and the marker arm (22). when the state of not accommodating the drawing marker (20) without being bent, Naeno table and drawing a marker (20) in a side view (11) are overlapped, drawing markers (20 by bending the marker arm (22) The state for housing, rice transplanter according to claim 1 draw marker (20) which is configured to be positioned below the balance spring (15).

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