JPH0619U - Walk-type Iwata planter - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a walk-behind Iwata transplanter capable of using a stand for grounding a float to stably support the airframe. [Constitution] A pair of left and right floats (28), (28) below the fuselage
Is mounted so that it can be vertically moved up and down via the float lifting link mechanisms (31) and (31), while the float lifting lever (3
4) is attached so that it can be rotated up and down, and the left float lifting / lowering link mechanism (31) and the right side of the float lifting / lowering operation lever (34) are interlockingly connected by the left float lifting / lowering feedback wire (36) and the right float The lifting link mechanism (31) and the left side of the float lifting operation lever (34) are interlockingly connected by the right float lifting feedback wire (36),
The midpoints of both wires (36), (36) were crossed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a walk-behind Iwata rice transplanter.

[0002]

[Prior art]

 Conventionally, as a form of walking type Iwata planting machine, one wheel is mounted on the center line facing the front-back direction of the machine body, and the operator grips the handles arranged on the left and right sides of the rear part and walks while planting seedlings. Some plants are designed to be planted.

[0003] The walk-type uniwa rice transplanter is equipped with a stand on the machine body, and the stand is erected so that it can be made independent.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned walk-behind Iwata rice transplanter, since the stand is only attached to one side of the body, the body is tilted in the self-supporting state, and stability is poor and it is opposite to the side on which the stand is attached. Since it was easy to fall to the side, there was a problem in safety when carrying out seedling mounting work on the aircraft and refueling work.

[0005]

[Means for Solving the Problems]

 Therefore, in the present invention, a pair of left and right floats are attached to the lower part of the machine body so as to be able to move up and down via a float elevating link mechanism, while a float elevating operation lever is attached to the machine body so as to be rotatable up and down, and a left float elevating link mechanism. And the right part of the float lift operation lever are linked by a left float lift feedback wire, and the right float lift link mechanism and the left part of the float lift lever are linked by a right float lift feedback wire. The purpose of the present invention is to provide a walking type Iwata transplanter characterized by intersecting the middle part of both wires.

[0006]

[Operation] When the walking type Iwata rice transplanter is stopped in a self-supporting state, the float elevating operation lever is rotated to lower the pair of left and right floats via the left and right float elevating feedback wires. As a result, it is possible to use a stand that presses both floats against the ground and supports the aircraft in a stable state.

At this time, the left float elevating / lowering link mechanism and the right side portion of the float elevating / lowering operation lever are interlockingly connected by the left float elevating / lowering feedback wire, and the right float elevating / lowering link mechanism and the left side portion of the float elevating / lowering lever are connected. Since the right float float up / down feedback wire is interlocked and the middle parts of both wires are crossed, it is possible to bend the ends of each wire with a large curvature, and to wire the wires. The above-mentioned stand can be used by lowering the sliding resistance between the inner wire and the outer wire forming the groove and smoothly and surely lowering the left and right floats.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A shows a walking type Iwata transplanter according to the present invention, 1 is a body frame of the walking type Iwata planter A, and an engine 2 is mounted on the upper surface of the body frame 1. The transmission case 3 and a pair of left and right hollow side frames 4 and 4 extending rearward from both the left and right sides of the transmission case 3 are formed in a U-shape in a plan view. A front end of a swing case 6 extending rearward between the side frames 4 and 4 is rotatably pivotally mounted, and a wheel 7 located on the center line in the left-right width direction of the body frame 1 is pivotally attached to the rear end of the swing case 6. The wheels 7 are rotationally driven from the engine 2 through the transmission case 3 and a chain (not shown) in the swing case 6.

Seedling planting cases 8 and 8 are fixed to the rear ends of the side frames 4 and 4, respectively, and the seedling planting cases 8 and 8 are connected to each other by a gate-type coupling frame 10. To form the body frame 1 as a whole, and further, on the inner side surface of the middle portion of one side frame 4, the base end of the lever 11 is rotatably pivotally attached by a pin 12 to the tip of the lever 11. Is an arm protruding from the swing case 6 as well as the tip of a piston rod 16 of a hydraulic cylinder 14 for raising and lowering a wheel, the base end of which is pivotally attached to the front end of the side frame 4, and the tip of the lever 11 and the swing case 6. The control device 5 configured to move the wheels 7 up and down by operating the hydraulic cylinder 14 for moving the wheels up and down by connecting them with the link 18 via the link 19 is configured. There is.

Moreover, the control device 5 connects the wheel lifting hydraulic cylinder 14 to the hydraulic pump (not shown) driven by the engine 2 through the hydraulic pressure switching valve 32, and at the same time, A pair of left and right floats 28, 28, which will be described later, are interlockingly connected to the switching valve 32 via a control link mechanism 33.

Further, the link 19 is formed with a plurality of connecting holes 19a and 19b for connecting to the tip of the piston rod 16 of the wheel lifting hydraulic cylinder 14, and the connecting hole formed at the rear end of the link 19 is formed. When the pin 17 is inserted into the hole 19b and the link 19 and the piston rod 16 are connected to each other, the upper moving range of the wheel 7 can be increased, and the wheel 7 can be largely moved upward during storage. At the same time, the aircraft is made to descend greatly to improve the stability of the aircraft in the retracted state.

In FIG. 1, reference numerals 20 and 20 denote a pair of left and right steering handles extending rearward from the both seedling planting cases 8 and 8. The steering handles 20 and 20 are bent obliquely upward. On the upper surface of the slanted part, there is a rear-tilting type seedling stand 24 that is movably supported to the left and right by a guide rail 22 horizontally mounted horizontally between the handles 20 and 20, and a rail mechanism 23. In addition, inside the both seedling planting cases 8 and 8, a sliding type that reciprocates between the seedling take-out opening in the guide rail 22 at the lower end of the seedling mounting table 24 and the field scene S is provided. Seedling planting mechanisms 26, 26 are provided respectively. G is a cultivator.

Further, a pair of left and right floats 28, 28 are arranged on both left and right sides of the wheel 7, and a rear portion of both floats 28, 28 is a planting depth adjusting mechanism at a base portion of the both handles 20, 20. It is attached via 30 and the front end is attached to both side frames 4 and 4 so as to be able to move up and down by a float elevating link mechanism 31 and 31.

As shown in FIG. 1, the float lifting / lowering link mechanism 31 connects one end of the first link 31b to the upper end of the support piece 31a attached to the side frame 4 and the second end to the other end of the first link 31b. One end of the link 31c is connected, and the other end of the second link 31c is connected to a connecting piece 31d attached to the front end of the float 28. 31e, 31f and 31g are connecting pins.

In addition, a float elevating operation lever 34 is vertically rotatably attached to a middle part of the left handle 20 via a lever supporting body 35, and the tip of the lever supporting body 35 and the float elevating and lowering operation are mounted. A float raising / lowering feedback wire 36 is provided between a connecting pin 31f connecting the first link 31b and the second link 31c of the link mechanism 31. 27 is a support shaft, and 56 is a lever holding clip, and the upper part of the float elevating operation lever 34 rotated upward by the clip 56 can be held in a fitted state.

The float elevating feedback wire 36 includes an inner wire 36a, an outer wire 36b that slidably surrounds the inner wire 36a, and wire stays 36c and 36d that support both ends of the outer wire 36b. Is forming.

As shown in FIGS. 1 and 3, the left-side float lifting feedback wire 36 connects one end of the inner wire 36a to the connecting pin 31f of the right-side float lifting link mechanism 31, and the inner wire 36a. The other end of 36a is connected to the left connecting pin 35b protruding from the left side wall 35a of the lever support 35, while the right float lifting / feeding back wire 36 connects one end of the inner wire 36a to the left lifting / lowering link mechanism 31. In addition to connecting to the connecting pin 31f, connect the other end of the inner wire 36a to the right connecting pin 35d projecting from the right side wall 35c of the lever support 35 so that the middle portions of both wires 36, 36 intersect. Wiring.

In this way, when the float elevating operation lever 34 is operated to move up and down, the inner wires 36a, 36a of the left and right float elevating feedback wires 36, 36 are slid forward, and the left and right float elevating links. While the mechanisms 31 and 31 can lower the left and right floats 28 and 28 so as to separate them from the machine, when the float elevating operation lever 34 is rotated downward, the inner wires 36a and 36a slide backward. As a result, the left and right float lifting / lowering link mechanisms 31 and 31 can raise and lower the left and right floats 28 and 28 so as to approach them.

Moreover, since the left and right float raising / lowering feedback wires 36, 36 are wired so that the middle portions thereof intersect, it is possible to increase the curvature of the bent portions of the respective wires 36, 36. The sliding resistance between the inner wire 36a and the outer wire 36b forming the wires 36, 36 can be reduced.

Further, a wheel raising / lowering operation lever 37 is attached to the left handle 20 so as to be positioned above the float raising / lowering operation lever 34 via a lever guide body 38. An interlocking mechanism 39 is provided between the valve 32 and the valve 32. 39a is a first link, 39b is a first rod, 39c is a second link, and 39d is a second rod.

As shown in FIG. 2, the lever guide body 38 is extended in the vertical direction to form a guide groove 40, and a wheel groove is formed at an upper end portion, a middle portion and a lower end portion of the guide groove 40, respectively. The lower groove 40a, the wheel neutral holding groove 40b, and the wheel raising groove 40c are formed to communicate with each other, and the wheel lifting operation lever 37 is inserted into the guide groove 40, and the lever 37 is guided. By sliding in the groove 40, the groove 40a, 40b, 40c can be locked.

In this way, when the wheel raising / lowering operation lever 37 is locked in the wheel lowering groove 40 a, the wheel 7 is moved downward by the wheel raising / lowering hydraulic cylinder 14 via the interlocking mechanism 39 and the hydraulic pressure switching valve 32. As a result, the aircraft can be moved upward.

Similarly, when the wheel raising / lowering operation lever 37 is locked in the wheel raising groove 40 c, the wheel 7 is moved upward by the wheel raising / lowering hydraulic cylinder 14 via the interlocking mechanism 39 and the hydraulic pressure switching valve 32. As a result, the aircraft can be lowered.

Further, when the wheel lifting operation lever 37 is locked in the wheel neutral holding groove 40b, the wheel 7 is held at the neutral position by the wheel lifting hydraulic cylinder via the communication mechanism 39 and the hydraulic switching valve 32. By doing so, the aircraft can also be held in the neutral position.

As shown in FIGS. 1 and 2, a wheel neutral holding mechanism 42 is provided between the lever guide body 38 and the flow raising / lowering operation lever 34, and the wheel neutral holding mechanism 42 is , Attach the lever neutral guide plate 43 to the lever guide body 38 through the guide rails 44, 44 so as to be slidable in the left-right width direction. While forming the inclined surface portions 43a and 43b for neutral guidance, the tension spring 46 is provided between the right end of the lever neutral guidance plate 43 and the stay 45 attached to the handle 20, and the same tension is applied. A spring 46 urges the lever neutral guide plate 43 to the right, and near the right end of the lever neutral guide plate 43, a push-pull wire 47 whose one end is linked to the float elevating operation lever 34 is interlocked. The other end is located.

The push-pull wire 47 connects one end of the inner wire 47a to the connecting piece 29 attached to the lever support 35, while connecting the pressing rod 47b to the other end of the inner wire 47a. The rod 47b is brought into contact with the rod receiver 43a attached to the right end of the lever neutral guide plate 43, and the inner wire 47a is interlocked with the vertical movement operation of the float elevating operation lever 34 in the outer wire 47c. It is designed to slide.

In this way, when the float elevating / lowering operation lever 34 is rotated downward, the inner wire 47a slides, and the pressing rod 47b presses the lever neutral guide plate 43 via the rod receiving body 43c. , The lever neutral guide plate 43 is slid to the left side against the tension biasing force of the tension spring 46 so that the wheel lifting operation lever 37 engaged with the wheel lowering groove 40a or the wheel raising groove 40c is moved. The neutral guiding inclined surfaces 43a, 43b are arranged so that the neutral guiding positions can be forcibly moved to the neutral position.

Therefore, unless the switching mechanism 50, which will be described later, performs a switching operation, when the float raising / lowering operation lever 34 is operated and the float 28 is lowered as described above, the wheel raising / lowering operation lever 34 is forced to operate. By moving the wheels 7 to the neutral position and setting the wheels 7 to the neutral state, the airframe can be held in the neutral state.

As shown in FIGS. 1 and 2, the switching mechanism 50 includes a lifting operation lever 51 mounted near a grip portion of the handle 20 via a lever support 53, and one end of a feedback wire 52 attached to the lever 51. The push rod 47b is connected to the end portion of the push / pull wire 47 on the side of the push rod, and the push rod 47b is moved rearward substantially orthogonal to the forward / backward direction of the push rod 47b in conjunction with the switching operation of the lever 51. The contact with the rod receiver 43c can be released. 52a is an inner wire, 52b is an outer wire, 52c is a spring, 54 is a connecting body, and 55 is a wire stay.

The embodiment of the present invention is configured as described above, and in the walking type Iwata planter A according to the present embodiment, the float elevating operation lever 34 is rotated downward, By moving the pair of left and right floats 28,28 downward by the feedback wires 36,36 for raising and lowering the left and right floats, the floats 28,28 are placed on the cultivator G in the field and on the ground on the road. It is pressed against J so that it can be used as a stand to stably support the aircraft.

At this time, the connecting pin 31f of the left float lifting / lowering link mechanism 31 and the right connecting pin 35d projecting from the right side wall 35c of the lever support 35 are connected by the inner wire 36a of the left float lifting / lowering feedback wire 36. In addition to interlocking, the connecting pin 31f of the right float lifting link mechanism 31 and the left connecting pin 35b protruding from the left side wall 35a of the lever support 35 are connected by the inner wire 36a of the right floating lifting feedback wire 36. Since they are interlockingly connected and the midpoints of both wires 36, 36 are crossed, it is possible to bend the ends of each wire 36, 36 with a large curvature, and to wire the wires 36, 36. Use the stand described above by reducing the sliding resistance between the inner wire 36a and the outer wire 36b that form 36 to smoothly and reliably lower the left and right floats 28, 28. It can be.

When the float 28 is used as a stand in the field, the float elevating operation lever 34 is pivoted downward, and the lever neutral guide plate 43 is moved by the pressing rod 47b of the wheel neutral retainer 42. By pressing and sliding, the wheel neutralization guide plate 43 forcibly shifts the wheel raising / lowering operation lever 37 to the neutral position to bring the wheel 7 into the neutral state as shown in FIG. Can be held in a state.

Therefore, when the stand is used as described above, it is possible to prevent the wheel 7 from sinking deeply in the field scene S, and the wheel 7 is prevented from slipping when the planting work is restarted. It is possible to prevent the vehicle from running smoothly.

When the float 28 is to be used as a stand on the road, the switching lever 51 is switched to release the pressing of the lever neutral guiding plate 43 by the pressing rod 47b, and in the same state. By rotating the float raising / lowering operation lever 34 downward and moving the pair of left and right floats 28, 28 downward by the left and right float raising / lowering feedback wires 36, 36 as shown in FIG. 28, 28 can be pressed against the ground J to stably support the vehicle body. In this case, the wheel 7 is lifted by the hydraulic cylinder 14 for lifting the wheel via the hydraulic switching valve 32 by the descending operation of the floats 28, 28. As the machine moves, the machine descends, the center of gravity of the machine becomes lower, the stability of the machine is improved, and seedling placement work and refueling work can be performed safely.

The control device 5 and the control link mechanism 33 in this embodiment can be configured similarly to the structure described in Japanese Patent Application Laid-Open No. 60-186215 filed by the applicant.

[0037]

[Effect of device]

 According to the present invention, the following effects can be obtained.

That is, according to the present invention, since the pair of left and right floats can be lowered to operate the stand by operating the float elevating and lowering operation lever, the machine can be kept in a safe state without attaching a stand. Since it can be supported, it is possible to ensure safety when carrying out seedling mounting work on the aircraft and refueling work.

Moreover, since the float lifting / lowering feedback wires that link the left and right float lifting / lowering link mechanisms and the float lifting / lowering operation levers are wired so that the midway portions thereof intersect with each other, the bent portions of the respective wires are bent. The curvature of the wire can be increased, and the slidability between the inner wire and the outer wire forming each wire can be ensured satisfactorily, and the lifting and lowering operations of both floats by both wires can be performed smoothly and reliably. The float stand described above can be easily used.

[Brief description of drawings]

FIG. 1 is a side view of a walk-behind single rice transplanter according to the present invention.

FIG. 2 is an explanatory view of the same main part.

FIG. 3 is a front view of the main part.

FIG. 4 is an explanatory view of a stand type use state of a walk-behind single rice transplanter in a field.

FIG. 5 is an explanatory view of a stand use state of a walk-behind single rice transplanter on the road.

[Explanation of symbols]

 A Walk-type Iwata planter 1 Airframe 2 Engine 5 Control device 20 Handle 28 Float 34 Float lifting operation lever 42 Wheel neutral holding mechanism 50 Switching mechanism

Claims (1)

[Scope of utility model registration request] 1. A pair of left and right floats (28) below the fuselage,
(28) is mounted vertically via the float lifting link mechanisms (31) and (31), while the float lifting lever (34) is mounted on the machine body so that it can rotate vertically, and the left float lifting link mechanism (31 ) And the right side of the float lifting operation lever (34) are linked by a left float lifting feedback wire (36) and the right float lifting link mechanism
(31) and the left side of the float raising / lowering operation lever (34) are interlockingly connected by a right side float raising / lowering feedback wire (36), and the midpoints of both wires (36) and (36) are crossed. A walking type Iwata planter.