WO2005020662A1

WO2005020662A1 - Vegetable transplanter

Info

Publication number: WO2005020662A1
Application number: PCT/JP2004/011469
Authority: WO
Inventors: Hideo Nakashima; Yukinobu Ishihara; Tomofumi Maekawa; Takayasu Sakagaito
Original assignee: Yanmar Co., Ltd.; Seirei Industry Co., Ltd.
Priority date: 2003-08-28
Filing date: 2004-08-10
Publication date: 2005-03-10
Also published as: JP2005065656A; KR20060121835A; CN1842270A; CN100421535C

Abstract

A vegetable transplanter capable of increasing planting function by stabilizing planting depth control, comprising lifting cylinders (24)(124) and lifting valves (31)(131) adjusting a seedling planting depth and a soil covering wheel (12) or a press wheel (180) as a lifting sensor detecting the seedling planting depth of planting claws (9)(109). The detecting operation of the soil covering wheel or the press wheel (180) is transmitted directly to the lifting valves (31)(131). Also, the soil covering wheel (12) or the press wheel (180) is connected to the lifting valves (31)(131) so that the soil covering wheel (12) or the press wheel (180) as the lifting sensor is not moved when the lifting valves (31)(131) are regulated manually.

Description

Specification

Vegetable transplanter

Technical field

The present invention relates to a vegetable transplanter for transplanting seedlings such as, for example, white onion (neppo-onion).

Background art

[0002] Conventionally, there is a technique in which a seedling taken out from a seedling mounting table is planted in a field with a planting claw. (For example, see Patent Document 1)

[0003] In the related art, the lifting valve is switched based on the vertical movement of a lifting sensor formed by a gauge wheel, and the height of the seedlings is changed by changing the vehicle height. Since the lifting sensor and the lifting valve were connected using a rod, play (play) at the link caused transmission loss, increasing the dead zone of the lifting sensor, and improving the function of planting depth control using the lifting sensor. In the structure that cannot be easily achieved, and when the lift sensor is moved by the operation of the manual lever when manually switching the lift valve, there is an operational problem such as an increase in the manual operation load.

Patent Document 1: Japanese Patent Application Laid-Open No. 5-236806

Disclosure of the invention

Problems to be solved by the invention

[0004] In the present invention, an object of the present invention is to improve the planting function by stabilizing planting depth control with respect to a vegetable transplanter.

Means for solving the problem

[0005] The vegetable transplanter of the present invention is a vegetable transplanter provided with an elevating cylinder and an elevating valve for adjusting the planting depth of seedlings and an elevating sensor for detecting the planting depth of the planting claws. The detection operation is directly transmitted to the lift valve.

[0006] Further, the vegetable transplanter of the present invention connects the lifting sensor and the lifting valve so that the lifting sensor does not move when the lifting valve is manually adjusted.

The invention's effect

[0007] In the vegetable transplanter of the present invention, the detection operation of the lifting sensor is directly transmitted to the lifting valve. Therefore, compared to the conventional structure using multiple links, the transmission loss can be reduced and the detection dead zone can be reduced, and the planting claw makes the raising and lowering adjustment to make the seedlings to be planted uniform in depth. It is possible to stabilize the control operation in the vicinity of the dead zone of detection by the elevation sensor, eliminate problems such as hunting, and to stabilize the control of the planting depth to improve the planting function.

[0008] In the vegetable transplanter of the present invention, an elevating sensor such as a long hole and a panel is provided to connect the elevating sensor and the elevating valve so that the elevating sensor is not moved by an operation of manually adjusting the elevating valve. Therefore, the operating load of the lifting lever that operates the lifting valve can be reduced, and for example, a relatively heavy covering wheel or pressure-reducing wheel can be used as a lifting sensor. Thus, even if the planting depth of the seedlings is changed, it is possible to eliminate problems such as a shift in the dead zone of the raising and lowering control, and it is possible to stably perform the planting depth control operation.

Brief Description of Drawings

FIG. 1 is an overall front view of a vegetable transplanter according to a first embodiment.

FIG. 2 is a rear view of the same.

FIG. 3 is a left side view of the same.

FIG. 4 is a right side view of the same.

FIG. 5 is a plan view of the same.

FIG. 6 is a bottom view of the same.

FIG. 7 is a front perspective view of the same.

FIG. 8 is a rear perspective view of the same.

FIG. 9 is an explanatory view of transplantation work.

FIG. 10 is a rear view of a nail placement part.

FIG. 11 is a perspective view of an engine output unit.

FIG. 12 is a side view of a vehicle height adjusting unit.

FIG. 13 is an enlarged view of the same.

FIG. 14 is a lower perspective view of the same.

FIG. 15 is a top perspective view of the same. : Fig. 16] Enlarged view of Fig. 15.

FIG. 17] A perspective view of a lift valve unit.

: Fig. 18] Front perspective view of the seedling transmission case.

FIG. 19] An upper perspective view of the same.

: Figure 20] Perspective view of extension boss.

FIG. 21] Cross-sectional view of the extension boss.

: FIG. 22] Explanatory diagram of a modified example of FIG.

FIG. 23] A front perspective view of a rolling sensor unit.

: Fig. 24] Plan view of the same part.

[Figure 25] Side view of the same part.

: FIG. 26] Front explanatory view of the same part.

Figure 27] Illustration of inter-stock adjustment lever.

: FIG. 28] Front view of the entire vegetable transplanter according to the second embodiment _c FIG. 29] Rear view of the same.

: Figure 30] Left side view of the same.

FIG. 31] The right side view of the same.

: Figure 32] Plan view of the same.

Figure 33] The bottom view.

Figure 34] Left side view of engine output.

FIG. 35] A right side view of the lifting link mechanism.

: Fig. 36] Right side view of the lifting sensor.

FIG. 37] A rear perspective view of the earth covering wheel.

: Fig. 38] Right perspective view of the step.

FIG. 39] A front perspective view of the front of the vehicle body frame.

: Fig. 40] Top perspective view of the seedling platform.

FIG. 41] A front perspective view of a rolling sensor unit.

: FIG. 42] Plan view of the same.

FIG. 43] A rear perspective view of the on / off lever portion. [Fig.44] A front view of the entire vegetable transplanter of Fig.28 with the tread width increased.

FIG. 45 is a rear view of the same.

FIG. 46 is a left side view of the same.

FIG. 47 is a right side view of the same.

FIG. 48 is a plan view of the same.

[Figure 49] The same bottom view.

Explanation of symbols

[0010] 12 Covering wheel (elevation sensor)

24 Lifting cylinder

31 Lift valve

180 Compression wheel (elevation sensor)

BEST MODE FOR CARRYING OUT THE INVENTION

First, the vegetable transplanter according to the first embodiment will be described in detail below with reference to the drawings.

The vegetable transplanter according to the present embodiment is a three-wheeled vegetable transplanter in which left and right traveling wheels 5 and 5 and a front wheel 11 are provided with respect to the body frames 1 and 3, and has a soil covering as described later. The configuration is such that the ring 12 is applied as an elevating sensor for detecting the planting depth of the planting nail 9.

As shown in FIGS. 1 to 10, 1 is a front body frame on which the engine 2 is mounted, 3 is a rear body frame connected to the rear of the front body frame 1, and 4 is a lower part of the rear body frame 3. Provided are a traveling transmission case, 5 are left and right traveling wheels that are supported on the traveling transmission case 4 via an axle case 6 so as to be able to swing up and down, and 7 is a seedling mounted behind a rear body frame 3 via a handle frame 8. A mounting table, 9 is a seedling planting claw installed between the left and right traveling wheels 5 on the traveling transmission case 4 via a planting case 10, 11 is a front wheel mounted on a lower side of the front body frame 1, and 12 is a front wheel. Numeral 13 covers the seedlings. Numeral 13 denotes a seedling picking nail for taking out one pot-shaped white leek seedling as a vegetable seedling from the seedling tray on the seedling table 7 which reciprocates right and left. Then, the white leek seedlings extracted by the seedling extraction claw 13 are released and supplied to the planting claws 9, and the front wheels 11 are moved while the aircraft is running by operating the steering frame 14 on the rear side of the handle frame 8. It is configured to perform a transplanting operation to plant white leek seedlings A at substantially regular intervals inside the groove 15. In the figure, 16 is a bonnet, 17, 18, and 19 are upper, middle, and lower spare seedling stands provided substantially symmetrically on both sides of the bonnet 16, 20 is a traveling speed change lever provided on the left side of the steering handle 14, 21 is a main clutch lever provided on the right side of the steering handle 14; 22 is a lifting lever provided on the right side of the steering handle 14; 23 is a groove 15 for forming a groove 15 in front of the planting position of the planting claw 9; Reference numeral 24 denotes a hydraulic lifting cylinder that swings the left and right axle cases 6 to raise and lower the left and right traveling wheels 5. At the time of transplanting work, the lifting cylinder 24 provided on the lower surface of the front body frame 1 is connected to the axle case 6, and the lifting cylinder 24 is operated by operating the lifting lever 22 to raise and lower the traveling wheel 5 and plant seedlings in the planting groove 15. Then, the running wheel 5 is raised to a high position, the front wheel 11 is moved inside the groove 15, the running wheel 5 is moved to the upper surface of the ridge 25 on both sides of the groove 15, and the upper surface of the ridge 25 behind one of the right and left running wheels 5 is moved. The worker walks and transplants seedlings A, such as white onions (neppo-negi). Also, as shown in Fig. 3, when turning on a field headland or traveling on a road, the traveling wheel 5 is lowered below the front wheel 11 so as to be in a forwardly lowered position, and the earth covering surface 12 Is lifted above the ground, and the covering ring 12 is lifted higher than the height of the ridge 25, thereby eliminating such a problem that the covering ring 12 hits the ridge 25 and breaks when turning the headland.

As apparent from the above and FIG. 10, in a vegetable transplanter in which a seedling A is planted inside a planting groove 15 by providing a planting claw 9 and a covering soil ring 12 between the left and right running wheels 5 in front and behind, A front wheel 11 having a pressure suppression function is provided on the front side of the fuselage, and the inner width L1 of the left and right front wheels 11 that move inside the planting groove 15 is formed larger than the planting opening width L2 of the planting claw 9 and has a pressure suppression function. After setting the front wheel 11 and flattening the inside of the planting groove 15, planting and covering the seedling A, maintain the planting depth of the seedling A properly, cover the soil properly, and The inner width L1 of the front wheel 11 is formed larger than the planting opening width L2 of the planting nail 9, and the opening of the planting nail 9 does not increase the resistance of the planting nail 9 to enter the soil. (Planting) operation is performed properly.

[0015] Further, the inner width L1 of the left and right front wheels 11 is formed to be narrower than the width L3 of the pressure-reducing soil of the soil covering wheel 12, and a part of the pressure-reducing soil surface of the front wheel 11 and a part of the pressure-reducing soil surface of the covering wheel 12 are formed. Overlapping and maintaining the contact pressure of the earth covering ring 12 properly and performing a stable repressing earth covering operation, eliminating the problem that the planting depth of the seedling A after soil covering becomes uneven, for example, Relative height detection of nail 9 Controlling to keep the planting depth of seedling A approximately constant by outflow is performed functionally.

Further, as shown in FIGS. 11 to 17, the lifting pump 26 is mounted on the front upper surface of the rear body frame 3, and the seedling harvesting case 27 is mounted on the rear upper surface of the rear body frame 3. The belt 28 transmits the power from the engine 2 to the traveling transmission case 4 on the underside of the vehicle body frame 3, and the power transmission from the traveling transmission case 4 to the seedling transmission case 27 via the continuously variable transmission belt 29. Drive the belt 30 by the pump 26, drive the left and right running wheels 5, the planting claw 9 and the seedling picking claw 13, and continuously plant the seedlings of the seedling mounting table 7 that reciprocates left and right in the planting groove 15 .

An elevating valve 31 is provided on the elevating pump 26, the elevating valve 31 is switched by the elevating lever 22 on the right side of the steering handle 14, and the elevating cylinder 24 is operated to elevate the traveling wheel 5, and the vehicle body frame 1, 3, etc. This is to change the height of the machine to the ground.The traveling wheel 5 is lowered with respect to the machine to make a headland turning or road running posture, while the running wheel 5 is raised with respect to the machine to planting posture. At the same time, a switch arm 32 is provided on the lift valve 31, and the lift lever 22 is connected to the switch arm 32 via the switching rods 33 and 34 and the relay link 35.

Further, a pipe shaft 36 is fixed to the lower surface side of the traveling transmission case 4, and the groove making machine 23 is provided on the pipe shaft 36 so as to be adjustable in height, and front, middle and rear sides integrally connected. Each of the planting frames 37, 38, and 39 is rotatably supported on a fulcrum plate 40 of a pipe shaft 36 via a supporting shaft 41, and the covering soil ring 12 is mounted on the planting frame 39 via a covering frame 42. The rear side of the planting depth frame 39 is connected to the planting depth switching lever 43 of the steering handle 14 via a telescopic mechanism 44 so that the planting depth adjustment range of the seedling A can be switched freely. The planting frame 39 is rotated around the support shaft 41 within the setting range of the planting depth switching lever 43 so that the planting nail 9 is opened so that the seedling A is planted so that the planting plant A is planted so that the planting contact is made at a constant contact pressure. Soil cover 12 represses and covers seedling A.

Further, one end of a planting arm 45 whose length can be adjusted is connected to the planting frame 37, and the other end of the planting arm 45 is connected to the switching arm 32 of the elevating valve 31 by a slot 46 and a shaft. 47, and the switching arm 32 is operated by the lifting lever 22 via the switching rod 34 so that the switching arm 32 is operated in conjunction with the detection operation of the planting frame 37. When the seedlings A are planted with the planting claws 9, connect the spring 48 to the planting arm 45 so that the planting frame 37 and the planting arm 45 do not move when When the 12 moves up and down, the switching arm 32 is switched via the planting frame 37, 38, 39 and the planting arm 45, and the lifting cylinder 24 is automatically controlled via the lifting valve 31. Is automatically controlled to keep the planting depth of the seedling A of the planting nail 9 approximately constant.

As apparent from the above, the lifting cylinder 24 and the lifting valve 31 for adjusting the planting depth of the seedling A, and the covering wheel, which is a lifting sensor for detecting the planting depth of the planting claw 9, are provided. In the vegetable transplanter, the detection operation of the covering wheel 12 is directly transmitted to the elevating valve 31, and the detecting operation of the covering wheel 12 is transmitted directly to the elevating valve 31. Compared to the conventional structure in which rollers are abutted on the way using multiple links, the transmission loss is reduced, the dead zone is reduced, and the planting claws 9 function to raise and lower the seedlings A evenly. The control operation in the vicinity of the detection dead zone of the covering soil ring 12 is stabilized to eliminate problems such as hunting, and the planting depth control is stabilized to improve the pricing function.

In order to prevent the covering wheel 12 from being moved by the operation of manually adjusting the lifting pump 26, for example, a flexible mechanism such as a slot 46 and a spring 48 is provided to connect the covering wheel 12 and the lifting pump 26, The operation load of the planting depth switching lever 43 that operates the pump 26 is reduced, and the planting depth of the seedling A is changed by, for example, using the relatively heavy covering wheel 12 as an elevating sensor and detecting the up / down movement by the covering wheel 12. Even so, problems such as shifting of the dead zone of the lifting control are eliminated, and the planting depth control operation of the seedling A is performed stably.

Further, an inter-stock switching shaft 49 is provided on the front side of the seedling transmission case 27 as shown in FIGS. 18 to 21, and an inter-stock transmission gear 50 switched by the inter-stock switching shaft 49 is attached to the seedling transmission case 27. The engine 2 power is transmitted to the input shaft 52 of the seedling transmission case 27 via the continuously variable transmission belt 29 and the pulley 51, and the inter-stock transmission gear 50 is connected to the seedling mounting table 7 and the seedling extraction claw 13 side. Power is transmitted from the input shaft 52 via the input shaft 52. Further, the inter-stock switching lever 53 is fixed to the inter-stock switching shaft 49, and the bolt 55 is fixedly fastened to the seedling transmission case 27 with the bolt 55. The stay 55 is engaged with the ring groove 57 of the switching shaft 49, and the stock switching shaft 49 comes out of the case 27. A stay 55 for fixing the inter-stock switching lever 53 is used as a keep plate to prevent the structure from being lowered, thereby simplifying the structure, reducing the number of components and reducing the manufacturing cost.

Further, as shown in FIG. 21, an extension boss 58 is detachably fixed to the seedling collecting transmission case 27 with bolts 59 and provided with a continuously variable transmission belt 29. 22.Attaching the extension boss 58, and removing the extension boss 58 as shown in FIG. 22, and attaching the input shaft 52a for transplanting vegetable seedlings, which does not require the continuously variable speed belt 29, to the transmission case 27. 27 is shared between the green onion seedling A specification and other vegetable seedling specifications to reduce the manufacturing cost by using common parts, while the extension boss 58 and the input shaft 52 are changed to different lengths. This makes it easy to respond to changes in the mounting positions of the stepped belt 29 and the pulley 51.

Further, as shown in FIGS. 23 to 26, a shaft body 60 is projected forward in the horizontal direction on the upper surface side of the elevating pump 26, and a cylinder shaft 61 is rotatably provided on the shaft body 60. A pendulum-type rolling sensor 63 is provided on a shaft 61 via a sensor arm 62, one end of a rolling arm 64 is fixed on the cylindrical shaft 61, and the rolling arm 64 is operated by swinging the rolling sensor 63 left and right. The other end of the rolling arm 64 is connected to a rolling valve (not shown), and the pendulum-type rolling sensor 63 swings left and right by tilting the fuselage left and right, thereby rotating the mouth ring arm 64 to rotate the rolling arm. The rolling valve (not shown) is operated by switching the rolling valve connected to 64, changing the height difference between the left and right running wheels 5 and automatically controlling the left and right inclination of the machine. The rolling sensor 63 is provided with an on / off lever 65 for turning the detection on and off, and the on / off lever 65 and the pin 67 are provided so as to protrude from a lever shaft 66.

The rolling arm 64 is provided with a notch 68 having a triangular shape in a front view, and the pin 67 is provided in the notch 68 so that the pin 67 can be released. Further, a fulcrum spring 69 is connected to the on / off lever 65, and the on / off lever 65 is urged by the fulcrum spring 69 so as to contact the off stopper 70 or the on stopper 71. When the on / off lever 65 is in contact with the off stopper 70, as shown in FIG. 26, the pin 67 is located at the top on the right side of the notch 68 in FIG. 26, and moves up and down while contacting the inner surface of the notch 68. It becomes impossible, the rolling sensor 63 cannot swing, and the rolling valve cannot be switched. On-off lever When the abutment 65 is in contact with the on-stopper 71, the pin 67 is located in the middle of the notch 68 in the vertical direction on the left side in FIG. 26, and can move up and down in the space of the notch 68. The rolling valve can be switched. In this way, the automatic horizontal control using the rolling sensor 63 is turned on / off by switching the on / off lever 65, so that there is no need for a wire and a receiver, as compared with the conventional operation using wires, and the number of components can be reduced.

Further, as shown in FIGS. 11 and 27, power is transmitted to the planting claw 9 and the like by using the continuously variable transmission belt 29 and the pulley 51 for stepless transmission, and the seedling A is planted by the planting claw 9. The inter-stock control is configured to be self-regulating, and the inter-stock adjusting lever 72 for shifting the pulley 51 and the inter-stock display indicator 73 are disposed obliquely rearward on the upper surface of the bonnet 16. Fine adjustment is possible, and the inter-stock adjustment lever 72 is close to the pulley 51, so that it can be configured at low cost.In addition, since the inter-stock adjustment lever 72 and indicator 73 are arranged diagonally rearward, the operator at the rear steering handle 14 position Easy to see and operate. Adjustment between strains can be performed more functionally than conventional hand operation and stepped switching.

Next, a vegetable transplanter according to a second embodiment will be described in detail below with reference to the drawings.

The vegetable transplanter according to this embodiment is different from the above-described embodiment in that the left and right traveling wheels 105 and 105 and the left and right front wheels lll'll are mounted on the body frames 101 and 103. This is a four-wheeled vegetable transplanter, in which a pressure-reducing wheel 180 is applied as a lifting sensor for detecting the depth of planting of the planting claws 109 as described later.

[0028] As shown in Fig. 28 to Fig. 33, the vegetable transplanter according to the present embodiment has substantially the same basic configuration as the vegetable transplanter according to the above-described embodiment (see Figs. 1 to 10). I have. That is, in the figure, 101 is a front body frame on which the engine 102 is mounted, 103 is a rear body frame connected to the rear of the front body frame 101, 104 is a traveling transmission case provided below the rear body frame 103, and 105 is Left and right traveling wheels supported on the traveling transmission case 104 via an axle case 106 so as to be able to swing up and down, 107 is a seedling mounting table installed via the handle frame 108 behind the rear body frame 103, and 109 is a left and right traveling The seedling mounting claw, which is mounted on the traveling transmission case 104 via the planting case 110 between the wheels 105, is mounted on the front body frame 1 and can swing up and down in conjunction with the swinging operation of the running wheel 105. Left and right front Numeral 112, a soil covering ring for covering the seedlings, Numeral 113: Seedling tray on the seedling platform 107 that moves reciprocally right and left Nursing claw for taking out one pot-shaped white leek seedling This is a crushing wheel having a crushing function, which is arranged on the front side of the fuselage with respect to the seedling mounting claw 109. Then, the white onion seedlings taken out by the seedling take-out claws 113 are released and supplied to the planting claws 109, and the pressure-reducing wheel 180 contacts the ridge on the ridge while the aircraft is running by operating the steering handle 114 on the rear side of the handle frame 108. It is configured to carry out transplanting work by planting white leek seedlings at approximately regular intervals.

[0029] In the figure, 116 is a bonnet, 117 to 118 are upper and lower spare seedling stands provided substantially symmetrically on both sides of the bonnet 116, 120 is a traveling shift lever provided on the left side of a steering handle 114, and 121 is a steering handle. A main clutch lever provided on the right side of 114, a lifting lever 122 provided on the right side of the steering handle 114, and a lifting cylinder 124 for swinging the left and right axle cases 106 to raise and lower the left and right running wheels 105 and the front wheels 111. The elevating cylinder 124 is provided on the lower surface of the front vehicle frame 101, and operates the elevating cylinder 122 to operate the elevating cylinder 124 to elevate and lower the traveling wheel 105 and the front wheel 111. The worker walks and moves behind the running wheel 105 and the front wheel 111, and transplants the seedlings such as leeks by bringing the pressure-reducing wheel 180 into contact with the upper surface of the ridge.

Further, a rolling cylinder 174 for horizontal control of the fuselage is disposed on the left side of the fuselage, and the mouth ring cylinder 174 is fixed to a rolling fulcrum shaft 182 provided in the left and right direction of the body frame 101. The rolling fulcrum shaft 182 is connected to the swing arm 182a, and the rolling fulcrum shaft 182 rotates in conjunction with the swing arm 182a being swung. At both ends of the rolling fulcrum shaft 182, connecting arms 182b are fixedly provided, respectively, and the connecting arms 182b are connected to the rotating shaft 183 of the axle case 106 via the running wheel connecting link mechanism 181 (FIG. 30 and Figure 34). The rotating shaft 183 of the axle case 106 is linked to the front wheel 111 (tread 199) via the front wheel connecting link mechanism 184, and the front wheel 111 swings the running wheel 105 by the front wheel connecting link mechanism 184. It is configured to swing in the same direction in conjunction with (see FIGS. 31 and 35). Then, by extending and retracting the piston rod of the rolling cylinder 174, the rolling fulcrum shaft 182 is rotated, and the left and right front wheels 111 and the running wheels 105 are moved up and down in opposite directions, thereby correcting the horizontal inclination angle of the aircraft. I will do horizontal control It is configured as follows.

As shown in FIGS. 34 and 35, an elevating pump 126 is mounted on the front upper surface of the rear vehicle body frame 103, and a seedling transfer case 127 is mounted on the rear upper surface of the rear vehicle body frame 103. The rotational drive of the engine 102 is transmitted to a traveling transmission case 104 on the lower surface of the rear body frame 103 by a velvet 128, and transmitted from the traveling transmission case 104 to a seedling transmitting case 127 by a belt 129. Driven by pump 130 to pump 126. In this way, the left and right running wheels 105, the planting claws 109, and the seedling removal claws 113 are driven to continuously plant the seedlings of the seedling mounting table 107 that reciprocates left and right.

As shown in FIGS. 35 and 36, the elevating pump 126 is provided with an elevating valve 131, the elevating valve 131 is provided with a switching arm 132, and the elevating pump 131 is moved up and down via switching rods 133 and 134 and a relay link 135. The lever 122 is connected to the switching arm 132. The elevating valve 122 is used to switch the elevating valve 131, and the elevating cylinder 124 is operated to elevate and lower the running wheels 105 and the front wheels 111, thereby changing the ground height of the machine such as the body frames 1 and 3. The traveling wheel 105 and the front wheel 111 are lowered to the attitude of headland turning or traveling on the road, while the traveling wheel 105 and the front wheel 111 are raised to switch to the planting posture with respect to the machine.

A pipe shaft 136 is fixed to the underside of the traveling transmission case 104, and a cover ring frame 138 is rotatably supported via a support shaft 139 on a fulcrum plate 137 provided on the pipe shaft 136. A covering ring 112 is provided in the middle of the covering ring frame 138 and substantially below the seedling mounting table 107. The covering wheel frame 138 is connected at the rear side to the planting depth switching lever 140 of the steering handle 114 via the telescopic mechanism 141 so that the planting depth adjustment range of the seedling A can be switched. The earth covering frame 138 is rotated around the support shaft 139 within the setting range of the planting depth switching lever 140 so that the planting claw 109 is opened so that the seedling is planted so that the seedling is planted so as to contact the ground with a substantially constant contact pressure. The soil covering wheel 112 suppresses the soil and covers the seedlings.

A support plate 142 is rotatably supported by the support shaft 139, and a pressure-reducing wheel 180 is swingably attached to the support plate 142. The crushing wheel 180 is disposed at a position in front of the planting claws 109 and overlaps with the traveling wheel 105 in a side view, and the crushing wheel 180 is provided at the end of the support arm 144 below the fuselage. 144 swings the fulcrum shaft 143 It is attached to the support plate 142 so as to be able to swing up and down as the center, and the other end is interlockingly connected to the planting depth switching lever 140 via a wire 185. The compression wheel 180 is urged upward by an elastic member 186 interposed between the other end of the support arm 144 and the support plate 142, and is operated within a set range by operating the planting depth switching lever 140. It is positioned by being swung up and down to flatten the ridge surface and detect the ridge height. That is, the elevating valve 131 is controlled so that the elevating cylinder 124 is operated so that the earth covering wheel 112 is always in contact with the ridge.

The support plate 142 has a planting frame 187 extending toward the front of the fuselage. One end of a planting arm 145 whose length is adjustable is connected to the planting frame 187, and the planting arm The other end of 145 is connected to the switching arm 132 of the elevating valve 131 via the elongated hole 146 and the shaft 147. When the support plate 142 swings, the switching arm 132 is operated via the planting frame 187, and the elevating lever 122 When the switching arm 132 is operated, the planting frame 187 and the planting arm 145 are configured to move. With this configuration, when the seedlings are planted with the planting claws 9, the pressure-reducing wheel 180 moves up and down with respect to the machine, so that the support plate 142, the planting frame 187, and the planting arm 145 can be used. The switching arm 132 is switched, and the elevating cylinder 124 is automatically controlled via the elevating valve 131, and the machine is raised and lowered to perform automatic control for keeping the planting depth of the planting claws 109 approximately constant. Is

As described above, the vegetable transplanter according to the present embodiment is a lifting cylinder 124 and a lifting valve 131 for adjusting the planting depth of the seedling, and a lifting sensor for detecting the planting depth of the planting claw 109. By providing the pressure-reducing wheel 180 and transmitting the detection operation of the pressure-reducing wheel 180 directly to the elevating valve 131, the transmission loss can be reduced as compared with the conventional structure using a plurality of links as in the above-described embodiment. The detection dead zone is reduced, and the planting claw 109 is used to make the depth of the seedlings to be planted uniform, so that it can be raised and lowered functionally, the control operation near the detection dead zone of the crushing wheel 180 can be stabilized, and hunting etc. can be performed. Eliminating defects, stabilizing planting depth control and improving the pricing function.

Also, as in the above-described embodiment, a flexible mechanism such as a long hole 146 is provided to prevent the pressure-reducing wheel 180 from moving when the lift valve 131 is manually adjusted. By connecting the bush 131, the operating load on the lifting levers 14 3 for operating the lifting valve 131 is reduced, and even if the planting depth of the seedlings is changed, the dead zone of the lifting control is shifted. The defect can be eliminated and the planting depth control operation of seedling A can be performed stably.

[0038] Other configurations of the vegetable transplanter according to the present embodiment will be outlined below.

As shown in FIGS. 29 to 31, FIG. 33, and FIG. 37, the soil covering wheel 112 provided in the vegetable transplanter according to the present embodiment has a soil attached to a contact surface 112a of the soil covering wheel 112 with the ground surface. A scraper 190 is provided for scraping off the scrap. The earth covering ring 112 is rotatably disposed on the earth covering ring frame 138 via the pivot shaft 188, and the support plate 189 is fixed to the side of the earth covering frame 138 near the pivot shaft 188 so that it cannot rotate. A scraper 190 is pivotally supported on the support plate 189 by a pin shaft 191 so as to be swingable. The scraper 190 has a blade portion 190a extending substantially parallel to a contact surface 112a of the earth covering ring 112 from a pivot portion formed by the pin shaft 191. The blade portion 190a comes into contact with the contact surface 112a from above by its own weight. With this configuration, the soil covering ring 112 performs the planting operation while covering the ridge surface with the contact surface 112a while the soil attached to the contact surface 112a is shaved off by the blade portion 190a of the scraper 190. And maintenance work such as cleaning can be omitted.

A bolt 192 for adjusting the swing range of the scraper 190 is provided on the upper end of the support plate 189 on the earth covering ring 112 in the present embodiment, and the bolt 192 is tightened with a screw. Adjust the gap between the part and the scraper 190. Conventionally, if the scraper 190 is fixedly attached to the earth covering ring 112 and attached to the blade 190a and the abutment surface 112a, pebbles of a certain size are interposed, and the earth covering ring 112 cannot rotate. was there. In this embodiment, the scraper 190 is pivotally supported so as to swing freely, the blade portion 190a is brought into contact with the contact surface 112a by its own weight, and the swing range of the scraper 190 is regulated by the bolt 192. By doing so, the scraper 190 can swing so as not to hinder the rotation of the earth covering ring 112, so that, for example, pebbles or the like are not caught between the blade portion 190a of the scraper 190 and the contact surface 112a. Even when mud or the like is firmly attached to the contact surface 112a in a convex shape and cannot be immediately scraped off even by the scraper 190, the rotation of the earth covering ring 112 is not hindered.

[0040] As shown in FIG. 30, FIG. 31, and FIG. A stand (not shown) mounting portion 193 is provided behind the frame 108. When the front wheel 111 and the wheel support 199 of the traveling wheel 105 are replaced, a stand for maintaining the body in a horizontal direction is fitted to the mounting portion 193 so as to be fitted thereto. The mounting portion 193 has a fitting portion 193b vertically protruding from an end of a frame portion 193a provided in the lateral direction of the body, and an upper end of the stand is fitted into the fitting portion 193b from below. . A through hole 193c for positioning is provided horizontally in the middle of the fitting part 193b in the vertical direction, and the through hole 193c and the hole provided substantially in the upper part of the stand are overlapped in the axial direction for positioning. By penetrating the pins or the like, the positioning force S can be set so that the stand does not come off or rotate from the mounting portion 193.

A rope hook 194 for hooking a rope or the like is provided behind the mounting portion 193 and on the lower side of the handle frame 108. For example, when the vegetable transplanter is mounted on a truck bed or a container and moved, the rope hook 194 is engaged with the rope hook 194 via a cargo bed / container or the like, so that Can be bound and fixed. In particular, by arranging the rope hook 194 at a strong position, the rope can be engaged with the rope hook 194 without being hindered by the frame (floating) formed on the outer edge of the carrier. The attachment section 193 and the rope hook 194 are provided on both sides of the fuselage.

As shown in FIGS. 33 and 39, a rolling valve 195 constituting a horizontal control mechanism is provided at the front end of the vehicle body frame 101. By arranging the rolling valve 195 at a position where it is strong, it is possible to balance the weight of the fuselage in the front-rear direction, maintain the balance of the fuselage, and facilitate maintenance. The horizontal control mechanism automatically keeps the planting section (such as the seedling planting claw 109) horizontal even on the sloped land, enabling stable planting. The horizontal control mechanism included in the vegetable transplanter according to the present embodiment is provided. A known mechanism can be adopted as the mechanism.

As shown in FIG. 30, FIG. 31, and FIG. 40, a tray (not shown) in which seedlings are arranged is placed on the seedling mounting table 107, and the tray extends along the slope of the seedling mounting table 107. Is transferred to the front of the aircraft. A transport chain 196 for transporting the tray forward is arranged on the seedling mounting table 107 so as to be able to be driven in an annular manner in the vertical direction from both sides. The tray is engaged and transported by the protruding projection 196a. The seedling mounting table 107 includes a mounting portion 107a and side portions 107b, and the like. The drive unit of the transport chain 196 (not shown) is mounted on the lower part of the seedling mounting table 107 whose upper part and side part are covered by the part 107b. By this driving unit, the transport chain 196 is circularly driven so as to transport the tray in the vertical direction with respect to the mounting unit 107a and forward the body.

[0044] The seedling mounting table 107 is provided with a wire extending in the front-rear direction of the side portion 107b and the seedling mounting table 107 at a gap between the mounting portion 107a and the side portion 107b and above the transport chain 196. A guide member 198 fixed to 197 is provided. The guide member 198 has a substantially rectangular shape, and its lower side is configured to guide the drive path of the transport chain 196 (the protrusion 196a). The guide member 198 guides and moves the transport chain 196 from below to above the seedling mounting table 107 in an annular manner, so that the tray and the transport chain 196 are easily engaged.

As shown in FIGS. 41 to 43, a pendulum-type rolling sensor 163 is provided on a side surface of the elevating pump 126, and a shaft 160 is horizontally projected forward from an upper surface of the elevating pump 126. A cylinder shaft 161 is rotatably provided on the body 160, and a pendulum-type rolling sensor 163 is connected to the cylinder shaft 161 via a sensor arm 162. One end of the rolling arm 164 is fixed to the cylinder shaft 161, and the rolling arm 164 is operated by the left and right swing of the rolling sensor 163. The rolling arm 164 is connected to the rolling valve 195, and the pendulum-type rolling sensor 163 swings left and right by tilting the body left and right, thereby rotating the mouth ring arm 164 and connecting the rolling valve 164 to the rolling arm 164. By switching 195, the rolling cylinder 174 (see FIGS. 30 and 34) is operated to change the height difference between the left and right traveling wheels 105 and the front wheels 111, and to automatically control the left and right inclination of the machine.

[0046] The rolling sensor 163 is configured to be turned on and off by an on / off lever 165 provided near the steering handle 114 at the rear of the fuselage. The on / off lever 165 is connected to the pin 167 via a wire cable 169 so that the pin 167 can swing. The pin 167 is provided so as to protrude from the pin shaft 166. The end force of the wire cable 169 is set at the end of a swing arm 170 fixed to the pin shaft 166 so as not to rotate relative to the pin shaft 166 about the swing center. It is pivoted to the department. The rolling arm 164 is provided with a notch 168 having a triangular shape in a front view, and the pin 167 is provided in the notch 168 so as to be able to release the penetration. The on / off lever 165 is provided in an operation groove 171 formed by cutting out a substantially inverted U-shape in a front view. The operation groove 171 is urged downward by an elastic member (not shown) so as to engage with either the off stopper 171a or the on stopper 171b at the end of the operation groove 171.

[0047] When the on / off lever 165 is engaged with the off stopper 171a, the pin 167 is located at the top on the right side of the notch 168 and abuts against the inner surface of the notch 168 so that it cannot move up and down. 163 could not swing and rolling valve 195 could not be switched. On the other hand, when the on / off lever 165 is operated to engage with the on / stop lever 171b, the swing arm 170 is swung via the wire cable 169 in conjunction with the operation of the on / off lever 165, and the pin 167 is notched The pin 167 can be moved up and down in the space of the cutout 168 on the left and right halfway, and the rolling valve 195 can be switched by swinging by the rolling sensor 163.

As described above, the on / off lever 165 is arranged near the steering handle 114, and the on / off control of the horizontal automatic control using the rolling sensor 163 can be performed by the switching operation of the on / off lever 165. This makes it possible to easily perform a powerful switching operation even while the operator is operating the body handle. A stock adjustment lever 172 and a stock display indicator 173 are provided near the steering handle 114 and beside the on / off lever 165 (see FIG. 29). Adjustment operation is easy even in the middle.

[0049] In the vegetable transplanter having a four-wheel structure configured as described above, the traveling wheel 105 is provided with a wheel support 200 that supports the traveling wheel 105, and the rotating shaft 183 is expanded and contracted in the width direction. The position in the width direction can be changed, and the front wheel 111 can be changed in the width direction by adjusting the wheel support 199 that supports the front wheel 111, and can be made smaller in the width direction and placed on a small truck bed or the like. S power

[0050] As shown in Figs. 44 to 49, the vegetable transplanter according to the present embodiment is configured such that the wheel support 200 and the wheel support 199 can be exchanged. The width can be changed widely. Specifically, on the front wheel 111 side and the running wheel 105 side, the tread width is increased by replacing and mounting wheel supports 201 and 202 having a wider tread width than the vegetable transplanter (see FIGS. 28 to 33). Can be spread. In this embodiment, the longitudinal length of the right side (left side in FIG. 44) body of the aircraft 201 and 202 is the length of the left side of the aircraft. It is configured to be longer than the length in the longitudinal direction. The wheel support 201 is configured so that the mounting position of the front wheel 111 can be changed, and the wheel support 202 has the end portion fixed to the body while rotatably supporting the rotation shaft 183, and further includes a vehicle body. It is attached to the body by being connected to both ends of the pipe shaft 136 fixed below the frame 103. Further, on the right side of the fuselage, the wheel support 201 and the wheel support 202 are connected in the front-rear direction by a reinforcing member 203 to increase the strength.

Industrial applicability

As an application example of the present invention, it can be used as a vegetable transplanter for transplanting seedlings such as lettuce, Chinese cabbage, cabbage, and large leaves and chrysanthemums, in addition to white onion (nepuka leek).

Claims

The scope of the claims

[1] In a vegetable transplanter equipped with an elevating cylinder and an elevating valve that adjusts the planting depth of seedlings and an elevating sensor that detects the planting depth of the planting claw, the detection operation of the elevating sensor is directly transmitted to the elevating valve. A vegetable transplanter characterized by that:

[2] The vegetable transplanter according to claim 1, wherein the lifting sensor and the lifting valve are connected so that the lifting sensor does not move when the lifting valve is manually adjusted.