JPH072046B2 - Vertical control device for planting section of passenger rice transplanter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rice transplanter for riding, and more specifically, a rice transplanter is mounted on a rear portion of a passenger towing vehicle through a lifting link mechanism so as to be able to move up and down. The hydraulic switching valve of the hydraulic device that operates the lifting link mechanism is switched due to the vertical movement in front of the pivot part of the float pivotally supported on the lower side of the rice transplanter, and the rice transplanter is automatically controlled to move up and down. The present invention relates to a planting part vertical control device for a riding rice transplanter.

[Prior art]

As shown in Japanese Patent Publication No. 57-86843, a planting part vertical control device in a conventional riding rice transplanter uses a hydraulic switching for raising and lowering control of the planting part based on adjustment of a planting depth adjusting mechanism. It has been shown that the float is moved up and down without changing the interlocking relationship between the valve and the float that moves the valve up and down.

Further, Japanese Patent Application Laid-Open No. 57-47416 discloses a mechanism for changing and adjusting the switching resistance of the hydraulic valve to change depending on whether the topsoil in the field is hard or soft.

[Problems to be Solved by the Invention]

In the prior art, a planting depth adjusting mechanism and a switching sensitivity adjusting mechanism of a hydraulic switching valve are disclosed, but if both of these techniques are provided in a passenger rice transplanter, the structure becomes extremely complicated.

[Means for solving the problem]

The present invention takes the following technical means in order to solve the above problems.

That is, according to the present invention, the rice transplanter B is mounted on the rear portion of the passenger towing vehicle A via the elevating link mechanism C so as to be able to ascend and descend, and the hydraulic switching valve 51 of the hydraulic device for operating the elevating link mechanism C is installed in the rice transplanter B. In the riding rice transplanter configured to automatically move up and down the rice transplanter B by switching up and down in front of the pivot of the float 45 pivotally supported on the lower side, the pivot of the float 45 is moved up and down. The planting depth adjusting mechanism 72 for adjusting is provided, and the link length changing mechanism 88 is provided in the valve linking mechanism D for linking the front side of the pivot 45 of the float 45 and the hydraulic pressure switching valve 51. The link length changing mechanism 88 and the planting depth adjustment so that the front side of the float 45 pivot part is also moved up and down in the same direction as the float 45 pivot part is moved up and down by operating the float adjusting mechanism 72. Mechanism 72
And the link length changing mechanism 88 can be changed and operated by the float angle-of-attack adjusting lever 97 provided at a position operable from the control seat 21. It is an attached part vertical control device.

[Advantageous effects of the invention]

According to the present invention, when the planting depth is adjusted by operating the planting depth adjusting mechanism 72 to change the planting depth of the float 45, the front side of the float 45 pivoting unit is simultaneously moved up and down in the same direction. The planting depth is adjusted without changing the relational state between the float 45 and the hydraulic pressure switching valve 51. Next, since the link length changing mechanism 88 can be changed by the float attack angle adjusting lever 97 provided at a position where it can be operated from the control seat 21, the operator can easily change the float The angle of attack can be changed to adjust the sensitivity according to the hardness of the field.

Therefore, although the structure is simple, there is an effect that the elevation control sensitivity of the planting part can be adjusted in a so-called variation of the angle of attack of the float.

〔Example〕

A riding type rice transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings.

A is a tow vehicle, B is a rice transplanter, and C is a lifting link mechanism.

Explaining the passenger towing vehicle A, reference numeral 1 denotes a main mission case, which is located on the front side of the vehicle body, and the input shaft 2 projects to the front side.

A U-shaped frame 3 is fixed to the rear portion of the main mission case 1. A connecting frame 4 has a front end fixed to the rear of the U-shaped frame 3 and a rear wheel transmission case 5 fixed to the rear end.

Reference numeral 6 denotes a front wheel transmission case, which is a case in which a diff mechanism is installed in the illustrated example, and is rotated around the axis of the output shaft 7 which is located in the U-shaped frame 3 and projects to the rear of the main transmission case 1. It is movably supported by the main mission case 1 and the U-shaped frame 3. A transmission shaft 8 fixed to a pinion gear that meshes with the ring gear of the differential mechanism is provided inside the connection frame 4. Reference numeral 9 denotes a vertical transmission case, which is provided at the left and right ends of the front wheel transmission case 6 in the vertical direction, and the front wheels 10, 10 are attached to the outside of the lower end of the front wheel transmission case 6 so that the direction thereof can be changed while being rotated. ing. 11 and 11 are wheel cases, the rear wheel transmission case 5
The bases are fixed to both left and right ends of the front end, the front end side is directed rearward and downward, and the rear wheels 12, 12 are attached to the outside of the lower end side.

Numerals 13 and 13 are columns, which are erected on the rear wheel transmission case 5 at regular intervals.

Reference numeral 14 denotes an engine pedestal, which is mounted on both left and right sides of the connecting frame 4, and an engine 15 is mounted on the upper part of these by a cushion rubber 16. And the engine
Reference numeral 15 is provided on the front side of the support columns 13 and 13 with a predetermined interval.

Reference numeral 17 denotes a step, which is stretched on both the left and right sides and the front side except the engine 15, and is supported by the main mission case 1, the U-shaped frame 3, the connecting frame 4, the columns 13, 13, and the like. Then, the left and right sides of the rear side of this step 17 are formed into inclined surfaces whose rear is higher.

Reference numeral 18 denotes an engine cover, which is provided so as to cover the front portion, the left and right side portions, and the upper surface portion of the engine 15, and the lower portion and the rear portion are made open, and the step 17 portion and the column 13, It is provided on 13 so that it can be detached. The engine cover 18 may be partially integrated with the step 17. Also, it is extremely convenient to open the right and left wall surfaces of the engine cover 18 as appropriate, cover the opening with a lid 19, and remove the lid 19 to enable internal engine adjustment and inspection. . Reference numeral 20 denotes a fuel tank, which is located at the rear opening of the cover 19 and is supported by the columns 13 and 13.

Reference numeral 21 denotes a control seat, which is supported on the engine cover 18.

Reference numeral 22 denotes a control frame, which is provided so as to stand upright at the left and right intermediate portions on the front side of the step 17, whereby the handle post 23
In addition, a power transmission unit and a battery are installed inside the control frame 22.

24 indicates a steering wheel.

Reference numeral 25 is a preliminary seedling placing table, which allows the seedling placing frame 25a on which the seedlings can be placed in several stages to be set on the supporting frames 26 and 26 which are vertically installed by fixing the base to the connecting frame 4 and spreading them to the left and right sides. It is provided. Reference numeral 27 denotes a setting locking tool, which is configured so that the support rod of the seedling placing table can be rotated by stepping on the petal 27a.

The power transmission structure is as shown in FIG. 9, and the counter shaft 30 connected to the input shaft of the hydraulic pump 29 by the belt is rotated from the output shaft 28 of the engine 15 and the counter shaft 30 is extended forward. This is rotatably supported by the main transmission case 1 and its front end is positioned at the side front part thereof. From now on, a continuously variable pulley 31 and a pulley in which a clutch mechanism is incorporated.
The input shaft 2 of the main transmission case 1 is configured to be transmitted and rotated by winding a V-belt between the input shaft 2 and 32. The hydraulic pump 29 may be supported by the connection frame 4 or the wheel transmission case via a support. Then, the output shaft 7 and the PTO shaft 33 are projected to the rear part of the main mission case 1, and the front wheel differential mechanism 34, the transmission shaft 8, the rear wheel differential mechanism 35, the wet multi-plate brake 36, etc. are projected from the output shaft 7 as described above. Power is transmitted to the left and right rear wheels 12, 12 via the PTO shaft 33, while the fixed position stop clutch 37, the transmission 38, and the safety clutch 39 are transmitted.
The power is transmitted to the transmission case 40 in which the and are incorporated, and the output shaft 41 from the transmission case 40 transmits the rice planter B side.

The rice planting device B includes a seedling supply table 43 that horizontally reciprocates laterally in a planting transmission case 42, a planting device 44 that divides seedlings into individual seedlings from the seedling supply table 43, and a soil leveling float that adjusts the soil surface. 45, 46 and the like, the rear connecting link of the upper and lower links 47, 48, the bases of which are pivotally attached to the columns 13, 13 of the towing vehicle A.
The left and right middle front portions of the planted transmission case 42 are rotatably attached to the 49. 50 is a hydraulic system, and the towing vehicle A is on the cylinder side.
And the piston side is pivotally connected to a shaft 51a integral with the upper link 47 so that the rice transplanter B can be moved up and down through a link mechanism C. Reference numeral 51 denotes a hydraulic pressure switching valve, which is configured to switch the valve 51 above and below the float 45 so that the ground pressure of the float 45 is always maintained in a state suitable for planting work.

The operation mechanism of the fixed-position stop clutch 37 provided in the middle of the power transmission to the hydraulic pressure switching valve 51 and the planting device will be described.
Are installed at a predetermined interval, and a fixed shaft 54 is rotatably provided on the base of a single hydraulic planting / operation lever 53.
Two cam plates 55, 56 are attached to the left end side of the shaft 54, and rollers 59 are provided rotatably on the swing arms 57, 58 so as to face the fan-shaped cam surfaces of the cam plates 55, 56, respectively. , 60 to spring 61,
A hydraulic pressure switching valve 51 which is press-contacted by 62 and is integrally provided in the front part of the case on the left side from the center part where another arm 63 integrated with the shaft 54 and the differential mechanism 35 of the rear wheel transmission case 5 are interposed. The lever 64 fixed to the valve switching shaft of is interlocked by the rod 65, and the other swing arm 58 and the operation clutch pin 66 of the fixed position stop clutch 37 are interlocked by the interlocking metal fitting 67, The plate 55 and the roller 59 are configured so that the operation area of the shaft 54 is switched and held at the positions (a), (b), (c), and (d) of the post-operation. And
When the operating lever 53 is set to the position (a) in the drawing, oil enters the hydraulic cylinder, the piston projects, and the lifting link mechanism C moves the rice transplanter B upward, and at the position (b), the valve 51 moves to neutral sol. In the (c) position, the oil is returned to the inside of the hydraulic cylinder in the rear wheel transmission case 5 as an oil tank, and the rice transplanter B is moved downward. Then, the fixed position stop clutch 37 holds the "off" state at each of the positions (a), (b) and (c), and becomes "on" at the position (d). Naturally, the rice transplanter B is in the downward state at the position (d).

The hydraulic pump 29 has an oil suction port provided on the right side of the rear wheel transmission case 5 so that oil flows through the rear wheel differential mechanism 35 when the planting portion is moved up and down. It is provided so as to cool the oil temperature. Then, as shown in the figure, the hydraulic pump 29 and the hydraulic switching valve
If both 51 are separately provided on the rear wheel transmission case 5 on the right and left sides, a well-balanced structure can be obtained.

Reference numeral 67 'is a return spring, and the rod 63 is provided on the tip end side of a shaft 69 that connects the arm 63 and a metal fitting 68 integrally provided on the upper link 47 of the link mechanism C in a flexible state.
A nut that is provided so as to hang down 65 and is screwed onto this shaft 69.
With 70, the urging force can be adjusted.

Therefore, when the planting part is lifted to the top end,
The arm 63 is moved down one rank against the regulation holding force of the operation lever 53, and automatically moves from the (a) position to the (b) position.
It is adapted to be switched to the neutral zone of the position. Reference numeral 71 in the figure indicates that the fixed-position stop clutch 37 is “engaged”.
The spring urged to the side is shown.

Reference numeral 72 denotes a planting depth adjusting mechanism, which connects a horizontal shaft 73 rotatably provided in the planting transmission case 42 of the rice planting apparatus B to a seedling supply table 43.
An adjusting lever 74 is provided on the back side of the
The ground level floats 45 and 46 are pivotally attached to the arm 73 via the arm 75 and the pin 76, and the rear part of the float is vertically movable by the lever 74.

Brackets 77 and 78 are attached to the front portion of the float 45 at a certain distance in the front and rear, and the front bracket 77
A T-shaped metal fitting 79 is pivotally attached to a pin 80, and a tension spring 81 is provided between the lower piece and the rear bracket.
Connect the rear piece and the lever 64 of the hydraulic switching valve 51 to the rod.
82, the connecting pin of the rear connecting link 49 and the lower link 48 is interlockingly connected via the metal fitting 83, the rod 84, and the base pivot shaft of the lower link 48 via the metal fitting 85 and the rod 86. . The T-shaped metal fitting 79, the rod 82, the metal fitting 83, the rod 84, the metal fitting 85, and the rod 86 pivotally supported by the pin 80 constitute a valve linkage mechanism D that links the front portion of the float 45 and the hydraulic switching valve 51. Has been done. Then, when the front part of the float 45 is lifted upward from a certain range, the cylinder 87 of the hydraulic cylinder device 50 provided between the rear wheel transmission case 5 and the upper link 47.
When oil is sent into a and the piston 87b protrudes and the rice transplanter B is moved upward, and conversely, when it is moved downward from a certain range, the oil in the cylinder 87a is returned to the rear wheel transmission case 5 and the piston 87b is moved. The valve 51 is switched so that the recessed rice transplanter B is moved downward.

On the other hand, the upward piece of the T-shaped metal fitting 79 and the planting depth adjusting mechanism.
An arm 89 fixed to a shaft 73 of 72 and an inner wire 90a of a release wire 90 are interlockingly connected. One end of the outer wire 90b is received by a metal fitting 91 fixed to the planted transmission case 42, and the other end is attached to the rear bracket.
The base of 78 is received by a rotating metal fitting 93 pivotally attached by a pin 92, and when the rotation of the rotating metal fitting 93 is fixed, the rear part of the float 45 is adjusted up and down by a planting depth adjusting mechanism 72. At the same time, the front part of the float 45 is also configured to move substantially in the same direction.

The float attack angle changing mechanism 94 has a lever 95 that is integrally provided with the rotating metal fitting 93 that protrudes upward from the planting transmission case 42 and is arranged on the upper backside river of the seedling supply table 43 and is provided with a support frame 96.
The float attack angle adjustment lever 97 provided on the upper end of the lever is interlocked with the release wirer 98, and the rotation fitting 93 is rotated by the rotation adjustment setting of the lever 97, and the rotation fitting 93 and the T-shaped fitting 79 are linked. By rotating the T-shaped metal fitting 79 with the tension spring 81 and changing the link length of 88, the control sensitivity for automatically adjusting the rice transplanter B up and down by vertically adjusting the front portion of the float 45 is obtained. It is configured to be changeable.

The above-described upper link 47 is pivotally connected to the U-shaped metal fitting 99 attached to the piston 87b side of the hydraulic cylinder device 50 via the shaft 51, and the outer receiver 101 and the wire of the marker actuation wires 100a and 100b. The support pins 103 for the pulling pins 102a and 102b are provided. Then, similarly, a pin support fitting 104 is provided on the cylinder 87a side, and nuts 105 and 105 for the two stoppers at the tips of the pins 102a and 102b are attached to the piston 87a.
When the 87b is projected, the wires 100a, 100b are pulled and the left and right markers 106a, 106b for wire drawing, which are attached to the rice transplanter B side so as to be upright, are erected to be in an unused state. . The U-shaped bracket 99 has the pin
The upper and lower intermediate portions of 102a and 102b are inserted, and the pins 102
An electromagnetic locking device 10 capable of switching the locking step portions (a) and (b) formed on a and 102b between a locked state and a released state.
7 is installed. That is, the wire-drawing markers 106a and 106b provided so as to mark a straight line as a mark in the direction of passage of the machine during the work are folded up by the raising of the rice transplanting apparatus B and fully pulled up through the wires 100a and 100b. At this time, the locking step portions (a) and (b) are locked by the electromagnetic operation pins 108a and 108b of the electromagnetic locking device 107,
Energize the solenoids 107a, 107b to pull the operating pins 108a, 108b against the springs to unlock the markers.
It is configured so that 106a and 106b fall and return to the drawing state.

The solenoids 107a and 107b are operated by a switch 109 whose left and right alternating conductive contacts are switched between "ON" and "OFF" in synchronism with the operation of the hydraulic planting / operation lever 53. The left and right markers 106a and 106b are automatically switched to the specially drawn state during the work such as turning, which moves the work state from the working state to the non-working state and then to the working state again. Marker 106 on the plantation side
The a and 106b project and fall, and a line is drawn on this side.

When attaching the rice transplanting device B to the rear connecting link 49 of the elevating link mechanism C, the front portion of the planted transmission case 42 is rotatably attached via a shaft in the front-rear direction, and the rear links 47, 47 are attached. The end portions and the left and right sides of the planted transmission case 42 are connected by rolling prevention springs 110a and 110b, and the rice transplanter B is relaxed so as to freely roll when the rice transplanter B is in a lowered working state. When B is raised, it is tensioned so that the rolling is substantially locked. Further, apart from the springs 110a and 110b, the rear ends of the upper links 47 and 47 and the planted transmission case 42 are also provided.
The springs 110a and 110b are provided for weakly engaging the left and right sides of the rice plant even in a working state, so that when the seedling supply table 43 reciprocates left and right, the right and left center of gravity of the entire rice transplanting apparatus B just moves the axis of the rolling. When it comes, the rice transplanter B suddenly inclines toward the moving direction of the seedling supply table 43, and the left and right planting devices 44, 44 ...
It is configured so as to prevent the planting depth from being deviated, and the balance spring 112 has metal fittings fixed to the upper ends of the rear connecting links 49, 49 and the left and right rear surfaces of the seedling supply table 43.
The rice planting apparatus B is configured so as not to tilt even when the seedling supply table 43 is reciprocally moved from side to side by connecting with a and 112b.

The operation shafts 114a, 114b of the side brakes 36a, 36b provided on the left and right sides of the rear wheel transmission case 5 are the transmission cases 5
It protrudes from the inside to the outside and the lever 11
5a and 115b are fixedly attached, and side brake vegetations 116a and 116 are provided side by side on the right side step 17 of the towing vehicle A.
The right lever 115a is directly connected to the rod 1
17a, a lever 115b on the left side is connected to a rod 117 via a crank metal fitting 118 pivotally supported on the right side of the rear wheel transmission case 5.
It is linked with b and 119.

If the rear wheel differential mechanism 35 in the rear wheel transmission case 5 is simply a bevel transmission mechanism 35a, a four-wheel drive type towing vehicle A having an inexpensive structure can be obtained. In this case, the side clutch 113a,
It becomes a side clutch and a side brake instead of 113b, and after the side clutch is disengaged, the brake on that side can be activated. Also in this case, the interlocking structure between the side clutch petal (corresponding to the side brake petals 116a and 116b) and its clutch / brake lever is the same as the previous example. The rod 119 is arranged between the column 13 and the hydraulic cylinder device 87 and below the lower link 48 to make the interlocking structure compact.

Since the leveling floats 46, 46 on the sides are located on the rear side of the rear wheels 12, 12, they are a cover that is erected upward at the front end thereof.
120 is mounted so that the wheel lifting mud does not get on the float 46.

The symbol 121 in the figure indicates the transmission shaft on the rice transplanter side.

With reference to FIG. 13 specifically for the above-described setting locking tool, the support 26a of the preliminary seedling mounting table 25 is attached to the support frame 26 on the shaft 2
This support 26 is constructed so that it can be rotated in the left-right direction by 6b.
Provide a locking metal fitting 27b with saw blade-shaped locking teeth on the
The setting lock 27 has a structure in which an arm 27c rotatable downward by a petal 27a is provided with a pin 27d which engages and disengages with the recess of the locking tooth.

Next, the operation of the above example will be explained in detail. A paddy rice transplanter is set in the field, and each spare seedling mount 25 and rice transplanter B
After placing the seedlings on the seedling supply table 43 on the side, the operation lever 53 is set to the position (d).

Then, the passenger towing vehicle A propels and pulls the rice transplanting device B, and the ground leveling floats 45, 46, 46 are floated on the surface soil surface of the paddy field and slid, and reciprocate left and right to move the seedlings on the lower end side. The seedlings sequentially delivered to the outlet are divided and held by the planting device 44, transferred downward, and transplanted to the surface soil surface.

In this way, the transplanting work is performed. At this time, in order to change the planting depth, the adjusting lever 74 is operated in the vertical direction to rotate the shaft 73 and the arm 75 to rotate the floats 45 and 46. The position of the rear pivot pin 76 may be adjusted up and down.

At this time, the T-shaped metal fitting 79 of the link length changing mechanism 88 is rotated via the release wire 90, and the pivotal support portion between the rearward piece of the T-shaped metal fitting 79 and the rod 82 linked to the hydraulic pressure switching valve 51 is reversed. The link length for connecting the pin 80 and the metal fitting 83 is changed so that the linkage between the front portion of the float and the hydraulic switching valve 51 is not affected by the operation of the adjusting lever 74. There is. That is, when the pivotal support portion between the rearward piece of the T-shaped metal fitting 79 and the rod 82 linked to the hydraulic pressure switching valve 51 is regarded as immovable, when the rear portion of the float 45 is moved up and down by the adjusting lever 74, the same amount as the vertical movement is obtained. Since the pivot portion of the rearward piece of the T-shaped metal fitting 79 and the rod 82 linked to the hydraulic switching valve 51 is moved up and down in the opposite direction by the amount, the front portion of the float 45 is moved up and down by the same amount as the rear portion. Therefore, the control environment in which the hydraulic pressure switching valve 51 is switched is prevented from being changed by operating the adjusting lever 74, and the planting depth can be changed and adjusted under stable conditions.

In addition, when the surface soil surface of the field is soft, the front part of the float 45 sinks deeply, the front part of the float does not move up and down due to the unevenness of the cultivator, and the hydraulic switching valve is accurately operated by this float. In such a situation that the elevation control of the rice transplanter B is not accurately performed because 51 is not switched, but in such a case, the float attack angle adjusting lever 97 is used to move the front portion of the float 45 downward. When 98 is loosened, the ground contact area of the float 45 increases and the float 45 can be easily moved up even in a weak field, and the raising control of the rice transplanter B becomes sensitive. On the contrary, when the surface soil surface is hard and uneven, if the lever 98 is used to pull the wire 98 and the front portion of the float 45 is appropriately pulled up, the sensitivity becomes insensitive. A situation where hunting lifting control is not frequently performed during work does not occur.

[Brief description of drawings]

1 is a side view, FIG. 2 is a plan view, FIG. 3 is a side sectional view of an essential part, and FIG. 4 is a part. FIG. 5 is a side view of the main part, FIG. 6 is a rear view of the main part, FIG. 7 is a side view of the main part, FIG. 8 is a perspective view of the main part, and FIG. Transmission mechanism diagram, 10th
FIG. 11, FIG. 11 and FIG. 12 are perspective views of the main part, and FIG. 13 is a rear view of the main part. In the figure, reference character A is a passenger towing vehicle, B is a rice transplanter, C is a lifting link mechanism,
D is a valve linkage mechanism, 21 is a control seat, 43 is a seedling supply stand, 45
Is a float, 51 is a hydraulic switching valve, 72 is a planting depth adjusting mechanism, 88 is a link length changing mechanism, and 94 is a float angle of attack changing mechanism.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Niiyama No. 1 Hachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Keiseki Nakamura, Inspector, Engineering Department, Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A rice transplanter B is attached to a rear portion of a passenger towing vehicle A via an elevating link mechanism C so as to be capable of ascending and descending, and a hydraulic switching valve 51 of a hydraulic device for operating the elevating link mechanism C is provided below the rice transplanter B. In the riding rice transplanter configured to automatically move up and down the rice transplanter B by switching due to the vertical movement of the float 45 that is pivotally supported to the side of the float 45, the float 45 is vertically adjusted. Planting depth adjustment mechanism 72
In addition, the link length changing mechanism 88 is provided in the valve linking mechanism D that links the front side of the pivotal portion of the float 45 and the hydraulic pressure switching valve 51, and the float is operated by operating the planting depth adjusting mechanism 72. The link length changing mechanism 88 and the planting depth adjusting mechanism 72 are interlockingly coupled so that the front side of the float 45 pivotal portion is also vertically moved in the same direction as the direction in which the 45 pivotal portions are vertically moved. A planting section up / down control device for a riding rice transplanter, characterized in that the link length changing mechanism 88 can be changed and operated even by a float angle of attack adjusting lever 97 provided at a position where it can be operated from the control seat 21.