JPH0321123B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a walking-type mobile agricultural machine for paddy fields such as a walking-type rice transplanter, and more specifically, the invention relates to a walking-type mobile agricultural machine for paddy fields such as a walking-type rice transplanter. This invention relates to a manual control device for the height of a walking-type mobile agricultural machine for paddy fields that can automatically control the height of the machine.

(b) Conventional technology Conventionally, walking-type mobile agricultural machines that control the height of the machine using a hydraulic actuator, such as rice transplanters, use a switching valve connected to the hydraulic actuator to detect the height of the machine such as a float. It is connected to a mechanism to automatically control the height of the aircraft according to the earth pressure acting on the float, and a hydraulic control lever is connected to the switching valve, so that the height of the aircraft can be adjusted by manual operation of the hydraulic control lever. The height is operated in automatic, raised, lowered, and neutral (fixed) positions.

Therefore, in addition to the main clutch lever connected to the travel clutch and the work clutch lever (hereinafter referred to as the planting clutch lever) connected to the work clutch (hereinafter referred to as the planting clutch lever), the rice transplanter has
A hydraulic control lever is required to control the lifting and lowering of the aircraft.

(c) Problems to be solved by the invention For this reason, when operating a rice transplanter on a headland,
At the same time as the side clutch lever is operated,
It is necessary to turn off the planting clutch lever and then move the hydraulic control lever from automatic to the raised position, but in reality, it is difficult for even an experienced person to perform these operations in a short period of time at the start of planting. This is quite difficult, and normally the hydraulic control lever is left in automatic mode to perform headland turns. Therefore, as the float rotates while remaining in contact with the rice field, as in the case of planting, mud is pushed on the sides of the float and the rice field in the headland area, which has been leveled, is washed away. In some cases, the soil was roughened and the planted seedlings were buried by pushing mud into the planting area outside the headland area.

In addition, when replenishing seedlings, the hydraulically operated lever is switched from automatic to the fixed or lowered position, but when resuming planting work after replenishing seedlings, the hydraulically operated lever must be returned to the automatic position. As a result, planting work was started without the machine being at the correct height, causing problems in the planting work.

Therefore, the present invention provides a walking type mobile agricultural machine for paddy fields that solves the above-mentioned problems by lifting and lowering the machine body using two operating levers: a main clutch lever and a work (planting) clutch lever. The purpose is to

(d) Means for solving the problem The present invention has been made in view of the above circumstances, and, for example, as shown with reference to FIG. 1, the first operating lever 26 connected to the working clutch and a second operation lever 25 connected to a travel clutch, and a paddy wheel is provided on a swinging member 13 that is swingably supported on the fuselage, and the swinging member 13 is connected to a hydraulic actuator 16. A switching valve 17 (seventh valve) connected to the hydraulic actuator 16 and communicating with the hydraulic actuator 16
) is connected to the body height detection mechanism (6, 29), and the switching valve is switched to the raised position, the lowered position, and the neutral position to automatically control the body height. Pertains to type mobile agricultural machinery. Then, the switching valve 17 is connected to the play mechanism 20.
It is connected to the first and second operating levers 26, 25 via a linking means 20 having a linkage means 20 having a linkage means 20a and 20b (FIG. 3) to operate these first and second operating levers as appropriate. based on the above, switching the switching valve to the up position, down position and neutral position,
It is characterized in that the height of the aircraft body can be manually controlled using the first and second operating levers.

(E) Effect Based on the above configuration, when the first operating lever 26 and the second operating lever 25 are in the predetermined positions, the linking means 20 can freely move within a predetermined range with its play mechanisms 20a and 20b. , the linking means 20 moves the switching valve 17 to the raised position, lowered position, or neutral position based on the aircraft height detection mechanisms 6 and 29, and the aircraft height acts on the aircraft height detection mechanism. Automatically controlled according to pressure. Further, when the first operation lever 26 and/or the second operation lever 25 is operated as appropriate, the movement range of the linking means is restricted or the linking means is held at a predetermined movement position, and the switching valve 17 is moved to the up position or the down position. Or operate to neutral position.

For example, with the second operating lever 25 held in the main clutch engaged position (or disengaged position), by further operating the first operating lever 26 from the disengaged position of the work clutch, While operating the aircraft in the upward direction and holding the first operating lever 26 in the on position (or off position), by further operating the second operating lever 25 from the off position or off position. , the machine body is operated in a downward direction, and the machine body is held at a predetermined height by holding the first and second operating levers at an intermediate position.

(f) Examples Examples of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, the traveling rice transplanter 1 has a body 5 consisting of an engine 2, a transmission 3, etc., and a float 6 is connected to a rear adjustment fulcrum 7 below the body 5. Center and front link 8
It is supported and suspended so that it can swing freely. Also,
A handle 9 extends to the rear of the machine body 5, a seedling stand 10 is fixed along the handle 9, and a planting rod 11 is arranged by power transmission from the transmission 3 via a planting clutch. has been done. Further, a paddy wheel 15 is disposed on the fuselage 5 through a chain case 13 which is swingably supported by a shaft 12 and constitutes a swinging member.
The piston 13 is connected via a link to a piston 16a of a hydraulic actuator 16 fixed to the body. The hydraulic actuator 16 is of a double acting type as shown in FIG.
The height of the paddy wheel 15 relative to the body 5 can be adjusted by operating the valve.

And, as shown in detail in FIGS. 3 and 4,
A semicircular plate 20 constituting a linking means is fixed to the operating shaft 17a of the rotary switching valve 17, and the plates 20 are arranged on the same circumference and have approximately the same length. Two long holes 20a,
20b is formed. These long holes 20a, 2
Pins 21a and 22a provided at the ends of the wires 21 and 22 fit together to form a play mechanism, and the other ends of the wires 21 and 22 are connected to a main clutch lever 25 and a planting mechanism, which will be described in detail later. The clutch levers 26 are connected to each other. Also, play
As shown in FIG. 5, a pin 27 is fixed to the center portion of the outer circumference of the seat 20 via a lug 20c.

On the other hand, a sensing rod 29 constituting a body height sensing mechanism is pivotally supported on the front link 8 of the float 6, and the other end of the rod 29 is connected to an arm 30. As shown in FIG. 6, the arm 30 is rotatably supported by a pin 30a fixed to the fuselage 5, and the pin 30a has a bent and engaging portion 31a. An arm 31 is pivotally supported, and the arm 31 is engaged by an engaging portion 31a only when the arm 30 rotates upward, that is, counterclockwise, and rotates together. Further, the arm 31 has a pin 31b implanted at the other end, and a spring 33 is tensioned between a plurality of selection pins 32 provided on the body 5 to prevent the arm 31 from engaging. Part 31a
is biased clockwise so as to engage the arm 30 and apply a predetermined ground pressure to the float 6. Further, a link 34 is provided between the pin 27 of the plate 20 and the pin 31b of the arm 31, and both pins 27 and 31b are connected to the link 34.
It fits into elongated holes 34a and 34b provided at both ends, and is connected by a weak tension spring 35.

On the other hand, the main clutch lever 25 and the planting clutch lever 26, as shown in FIGS. 8 and 9,
Lever guide plate 36 provided at handle 9 part
The levers 25, 26 are rotatably supported by a support shaft 37, and the main (traveling) levers 25, 26 are guided by guide grooves 36a, 36b, respectively.
A wire 39 is connected to the clutch, and a wire 40 is connected to the planting (working) clutch. Arms 41 and 42 are rotatably supported on the support shaft 37 adjacent to the main clutch lever 25 and the planting clutch lever 26, respectively, and each arm 41 and 42 is connected to the plate 26, respectively.
The rods 25a, 26a are connected to the wires 21, 22 linked to the lever 20, and are in contact with the rods 25a, 26a fixedly attached to the respective levers 25, 26, so that they can rotate together. The guide groove 36a of the main clutch lever 25 is L-shaped, and the main clutch is engaged at the upper end position A and disengaged at the interrupted position B.
Also, at the A-B position, the rod 25a is connected to the arm 41.
The arm 41 is brought into contact with a stopper pin 45 by a spring 43 (FIG. 1) provided at the other end of the wire 21, and
The pin 21a at the other end is set to be located in the center of the elongated hole 20a, and when it is further engaged in position C, which is a locking part, the arm 41 is attached to the rod 2.
It is rotated together with the lever 25 via 5a. In addition, the guide groove 36b of the planting clutch lever 26 has a spring 4 attached to the back surface of the plate 36 at its intermediate portion.
6 is fixed and constitutes a resistance stopper,
The planting clutch is engaged at the upper end position D, and the stopper is 4.
The rod 26a does not come into contact with the arm 42 at the D-E position, and the arm 4
2 is brought into contact with a stopper pin 49 by a spring 47 (FIG. 2) provided at the other end of the wire 22, and the pin 22a at the other end of the wire 22 is positioned in the center of the elongated hole 20b. When the arm 42 passes the resistance stopper 46 and reaches the lower position F, the arm 42 rotates together with the lever 26 via the rod 26a, and moves to the lower position G of the guide groove 36b. Then, the wire 22 is further pulled and the pin 22a rotates the plate 20.

Next, the operation of this embodiment based on the above configuration will be explained.

To perform planting work with the rice transplanter 1, as shown in FIG.
Switch to the engaged position A, connect the main clutch (traveling clutch), and lower the planting clutch lever 26.
Switch from the disconnected position E to the engaged position D, and connect the planting clutch. Then, the rice transplanter 1 runs with the paddy wheels 15 driven, the planting rod 11 rotates and performs the planting work, and the arms 41 and 42 are moved to the engaged position of both clutch levers 25 and 26. Stopper pins 45, 49 regardless of A, D, disconnected positions B, E
The pins 21a and 22a are in contact with the plate 2 in the neutral state via the wires 21 and 22.
0 is located at the center of the long holes 20a and 20b. As a result, the plate 20 can rotate upwardly Y and downwardly Z with respect to the neutral position X within the range of the elongated holes 20a and 20b, and the plate 20 follows the vertical movement of the float 6. 20, switches the valve 17 between forward and reverse to operate the hydraulic actuator 16,
Automatically controls aircraft height over the entire range. For example, when the ground pressure of the wheels 15 on the tiller is weak, a large pressure acts on the float 6 from the field surface, and the machine body 5
Lift the front of the float 6 against the Then, the arm 30 is rotated counterclockwise (FIGS. 1 and 3) via the sensing rod 29, and the engaging portion 31
Rotate the arms 31 together in the same direction via a,
With the pins 31a and 27 held at the inner ends of the elongated holes 34b and 34a by the spring 35,
The plate 20 is rotated in the downward direction Z via the link 34. As a result, the valve 17 is switched and the piston 16a of the hydraulic cylinder 16 is extended.
The paddy wheel 15 is rotated by rotating the swing chain case 13.
move downward. Then, when the fuselage 5 rises to a predetermined height and the pressure from the rice field acting on the float 6 reaches a predetermined value, the front part of the float swings downward relative to the fuselage, and each rod, arm... The plate 20 is returned to the neutral position X via the system and link. vice versa,
When the ground pressure of the paddy wheel 15 on the tiller is large, the front of the float 6 is lowered and each rod 29, arm
Plate 2 via systems 30, 31 and link 34
0 rotates in the upward direction Y, raises the paddy wheels 15 by a predetermined amount, and lowers the body 5 to a predetermined height.
As described above, the height of the body 5 is always maintained at an appropriate level by automatically controlling the height of the wheels 15.

Next, when the rice transplanter 1 reaches the headland and is to be planted, the main clutch lever 2 is moved as shown in Fig. 11.
5 remains in the engaged position A, the planting clutch lever 26 is switched to the lower position F beyond the resistance stopper 46. Then, the planting clutch is cut, and at the same time, the arm 42 is rotated via the rod 26a, pulling the wire 22 and pulling the pin 22a.
However, the elongated hole 20 in the neutral state X of the plate 20
It is moved so that it touches the outer edge of b. At this time, the main clutch lever 25 remains in the engaged position A (although the same is true in the disengaged position B), so the pin 2
As described above, 1a is located at the center of the elongated hole 20a when the plate 20 is in its neutral state. That is, in this state, the pin 22a contacts the end of the elongated hole 20b, preventing the plate 20 from rotating in the upward direction Y, and preventing the valve 17 from moving to the lowering position of the body. In this state, the handle 9
When the float 6 is lifted upward, the distance between the front part of the float 6 and the fuselage 5 becomes narrower, and the above-mentioned automatic control of the ascending direction of the fuselage is activated. That is, rod 29, arm 3
The plate 20 rotates in the downward direction Z through the links 34 and 34, switches the valve 17, extends the hydraulic actuator 16, lowers the wheels 15, and raises the body 5. When Aircraft 5 rises by the desired amount,
The rice transplanter 1 is placed in a horizontal state by lowering the handle 9, but at this time the float 6 hangs down and attempts to rotate the plate 20 in the upward direction Y; Rotation is regulated, and automatic control prevents the aircraft 5 from descending. In this state, the arm 30 of the float 6 is detached from the engagement portion 31a of the arm 31, and the float 6 is attached to the pin 30a.
By rotating clockwise around , the float 6 is in a suspended state together with the arm 30 and rod 29, and therefore the float 6 is in a state in which it is in light contact with the field surface without the weight of the machine acting on it. be. When the rice transplanter 1 is rotated in this state, the rice transplanter 5 is maintained at an appropriate height regardless of whether it is shallow or deep, and the rice transplanter 1 can be easily operated without mud pushing by the floats 6. In this embodiment, the arms 30 and 31 are separated to prevent the weight of the float 6 from directly acting on the plate 20;
It is also possible to construct the float 6 as one piece so that the float 6 does not hang down when the machine is raised, and the float is completely separated from the rice field.

Furthermore, in order to supply seedlings to the seedling stand 10 of the rice transplanter 1, as shown in FIG.
5 is held in the locking position C, the main clutch is disengaged, and the planting clutch lever 26 is left in the engaged position D. Note that even when the planting clutch lever 26 is in the engaged position, the main clutch is disengaged, so the planting rod 11 does not rotate. Then, Rod 25
The arm 41 is rotated via a, and the wire 21
By pulling , the pin 21a is moved so as to contact the outer end of the elongated hole 20a in the neutral state X of the plate 20. At this time, the planting clutch lever 26
remains at the engaged position D (although the same holds true for the disengaged position E), so that the pin 22a is located at the center of the elongated hole 20b when the plate 20 is in its neutral state, as described above. That is, in this state, the pin 21a of the plate 20 is restricted from rotating in the downward direction Z as the pin 21a touches the end of the elongated hole 20a, and the switching valve 17
is prevented from going into the raised position. Therefore, when the pressure from the field surface acting on the float 6 is small, the front part of the float 6 is lowered, and the plate 20 is moved in the upward direction Y via the rod 29, arms 30, 31, and link 34. However, even if the front part of the float 6 rotates upward relative to the fuselage 5, the plate 20 will not move in the downward direction Z.
pin 31b of arm 31.
is absorbed by moving along the elongated hole 34b against the spring 35. Thereby, the machine body 5 and the float 6 are stably grounded at a low position on the rice field surface, and seedlings can be easily replenished. Also, after replenishing the seedlings, move the main clutch lever 25 to position A.
When this is done, the main clutch is connected, the rice transplanter 1 runs, and the planting rod 11 rotates to start planting work, and at the same time, the automatic height control of the machine body 5 is automatically switched and maintained.

In addition, in order to stop the height control of the rice transplanter 1 and fix the rice transplanter 5 for transportation or storage, the 13th
As shown in the figure, the main clutch lever 25 is locked in the locking position C, and the planting clutch lever 2
6 is switched to and held at the lower position F beyond the resistance stopper 46. Then, the main clutch and planting clutch are disconnected, and at the same time, each rod 2
The arms 41 and 42 are rotated via the arms 5a and 26a to pull the wires 21 and 22. This results in
Both pins 21a and 22a are in contact with the outer ends of the elongated holes 20a and 20b of the plate 20, and the plate 20 is held at the neutral position X, and rotation in the upward direction Y and downward direction Z is prevented. Therefore, the valve 17 is fixed at the neutral position and the fuselage 5 is held at this position.

Furthermore, when the rice transplanter 1 is manually raised for driving on the road or over ridges, the main clutch lever 25 is placed in the engaged position A or the disengaged position B, and the planting clutch lever is -26 is rotated to the two-cut lower position G. Then, the planting clutch is cut, and at the same time, the arm 42 is rotated via the rod 26a, and the wire 22 is fully pulled so that the pin 22a comes into contact with the end of the long hole 20b of the plate, and the plate Attach the pin 21a to the end of the elongated hole 20a.
Rotate until they touch. Then, plate 20
is rotated in the downward direction Z regardless of automatic control by the float 6, operates the valve 17 to extend the hydraulic cylinder 16, lowers the wheels 15, and raises the body 5. In this state, the planting clutch lever 26
When the lever 26 is released, the lever 26 is returned to the lower position F, and only the lifting of the aircraft is automatically controlled as shown in FIG.

Next, an embodiment partially modified from FIGS. 15 to 17 will be described.

The embodiment shown in FIG.
5, planting clutch lever 26 and each arm 41,
42, and pin 2 at entry positions A and D.
1a and 22a are maintained at the center position of each elongated hole 20a and 20b in the neutral state of the plate 20,
The cutting positions B and E are set to be located at the outer ends of the elongated holes 20a and 20b, respectively.

As a result, when the main clutch lever 25 and the planting clutch lever 26 are both set to the engaged positions A and D as shown in FIG. The aircraft will enter the automatic height control state as shown in . In addition, as shown in FIG. 11, if the planting clutch lever 26 is moved to the disengaged position E while the main clutch lever 25 is in the engaged position A, the planting clutch is disengaged, and at the same time, the aircraft as shown in FIG. Only the upward direction is automatically controlled, and it can be easily rotated as described above. In addition, when replenishing seedlings, as shown in C, when the main clutch lever 25 is set to the disconnected position and the planting clutch lever 26 is set to the engaged position, the rice transplanter 1
The movement of the machine stops, and the rotation of the planting rod 11 also stops due to the disengagement of the main clutch, and at the same time, only the downward movement of the machine body is controlled as shown in FIG. Furthermore, as shown in d, both clutch levers 2
When both the main clutch and the planting clutch are disengaged, the 13th
As shown in the figure, both pins 21a and 22a are connected to the elongated hole 20.
In contact with the ends a and 20b, free rotation of the plate 20 is prevented, and the body is fixed at a predetermined height.

In the embodiment shown in FIG. 16, the guide groove 36a of the main clutch lever 25 is provided with a two-stage lower position H that is one stage lower than the locking portion (one-stage lower position) C.

As a result, as shown in FIG. 17, when the main clutch lever 25 is set to the two-step lower position H and the planting clutch lever 26 is set to the engaged position D or the disengaged position E,
The main clutch is cut, and at the same time the wire 21 is fully pulled, the pin 21a contacts the end of the slot 20a, and the plate 20 is connected to the end of the slot 20b with the pin 22a.
Rotate until they touch. Then, plate 20
is rotated in the upward direction Y regardless of automatic control by the float 6, contracts the hydraulic cylinder 16, raises the wheels 15, and lowers the fuselage 5. By this manual forced lowering, the front part of the machine body 5 is supported on the float 6, and seedlings can be supplied while the machine body is stably held. At this time, even if the float 6 is in contact with the rice field and cannot be rotated downward, and therefore the link 34 cannot be moved, the pin 2
7 can be absorbed by moving along the elongated hole 34a against the spring 35. This embodiment is the same as the first embodiment described above, except that the guide groove 36b of the planting clutch lever 26 is a stepped portion instead of the spring-based resistance stopper 46, so the explanation will be omitted. Omitted.

(g) Effects of the Invention As explained above, according to the present invention, the height of the machine can be adjusted in any working state by using only two operating levers, the first operating lever 26 and the second operating lever 25. can be controlled, and the walking-type mobile agricultural machine 1 for paddy fields can be easily operated. To be more specific, when operating two of the three operating levers, the main clutch lever, the work main clutch lever, and the hydraulic operating lever, as in the past, the operator It is difficult to operate unless you visually check the operation position, and it is also necessary to check the operation position of each control lever before operating it, but when operating one of the two control levers, There is no need to visually confirm the lever, and the operating position of the operating lever can also be operated without visual confirmation due to the stop position of the guide plate, etc., making it ergonomically possible to adjust the operating state and side clutch lever. 2 above while paying attention to other operations such as
The book's operating lever can be easily operated.
In particular, when running on headlands, the operating lever
26, the body 5 can be raised easily, without mud pushing by the floats 6, and without making the rice field uneven or burying the planted seedlings. Mobile agricultural machine 1
can be administered. In addition, to supply seedlings, etc. to the working machine, simply operate the operating lever 25, and the machine body 5 is lowered and stably held in a predetermined position, making it possible to easily supply seedlings, etc., and to plant. When resuming work such as this, simply moving the operating lever 25 to the predetermined position A automatically activates the automatic height control of the machine, which eliminates the risk of erroneous operation and maintains the proper height of the machine at all times. be able to.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the main parts of the operating device according to the present invention, FIG. 2 is a side view showing a rice transplanter to which the invention can be applied, and FIG. 3 is an enlarged partial side view showing the main parts. FIG. 4 is a rear view thereof. Also, the fifth
The figure is a perspective view showing the linking means, FIG. 6 is an exploded perspective view showing the arm constituting the aircraft height detection device, and FIG.
The figure is a diagram showing a hydraulic circuit. Furthermore, FIG. 8 is a perspective view showing the second operating (main clutch) lever and the first operating (planting clutch) lever, and FIG. 9 is a side view showing the planting clutch lever. Fig. 10 is an explanatory diagram of the operation in the automatic height control state, Fig. 11 is an explanatory diagram of the operation in the automatic state of only lifting the aircraft, Fig. 12 is an illustration of the operation in the automatic state of only lowering the aircraft, and Fig. 13 is an illustration of the operation in the automatic state of only lowering the aircraft. FIG. 14 is an explanatory diagram of the operation in the fixed state, and FIG. 14 is an explanatory diagram of the operation in the manually raised state. Moreover, FIG. 15 is a diagram showing the operation in each working state showing another embodiment. Further, FIG. 16 is a diagram showing the operation in each working state showing a partially modified embodiment, and FIG. 17 is an explanatory diagram of the operation in the manually lowered state. 1... Walking type mobile agricultural machine for rice fields (rice transplanter), 5...
... Airframe, 13 ... Swinging member chain case, 15
...Paddy wheel, 16...Hydraulic actuator, 1
7...Switching valve, 20...Linking means, 20
a, 20b... play mechanism (long hole), 25... second
Operating lever (main clutch) lever, 26...First operating lever (working) clutch lever, 6, 2
9-35... Aircraft height detection mechanism, A, D... In position, B, E... Off position.

Claims (1)

[Scope of Claims] 1. A rocking member that is provided with a first operating lever connected to a working clutch and a second operating lever that is connected to a running clutch, and is swingably supported by the aircraft body. A paddy wheel is provided on the holder, the swinging member is connected to a hydraulic actuator, a switching valve communicating with the hydraulic actuator is connected to an aircraft height detection mechanism, and the switching valve is set in a raised position and a lowered position. and a walking type mobile agricultural machine for paddy fields configured to be able to automatically control the height of the machine by switching to a neutral position, wherein the switching valve is operated by the first and second operations via a linking means having a play mechanism. By appropriately operating these first and second operation levers, the switching valve is switched to the raised position, lowered position, and neutral position, and the height of the aircraft is adjusted to the first and second operating levers. An operating device for a walking-type mobile agricultural machine for paddy fields, which is configured to be manually operated using two second operating levers.