JPH1156009A - Farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent such extremely dangerous accident, which occurs in attaching and detaching a working machine part, that lifting and lowering link device operates up to utmost position when relative positions of both hitches are inadequate and docking of both hitches is not completely carried out thereby. SOLUTION: This farm working machine detachably installs a working machine part on a lifting and lowering link device for lifting and lowering working machine part fixed to a traveling machine body. The farm working machine is equipped with a lifting and lowering operating tool for raising the working machine part to utmost position, detecting means 65a and 66a for detecting whether the working machine part is completely attached to the lifting and lowering link device or not and a control means 67 for controlling so that the working machine part is not raised up to utmost position by operation of the lifting and lowering operation tool when these detecting means detect that the working machine part is not completely attached to the lifting and lowering link device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural work machine in which a work machine section is detachably mounted on a lifting link device for lifting and lowering the work machine section provided on a traveling vehicle body.

[0002]

2. Description of the Related Art An agricultural work machine such as a riding type rice transplanter in which a working machine unit is mounted on a traveling vehicle body via a lifting link device so that the working machine unit can be moved up and down so that the working machine unit can be easily attached and detached. There is a configuration in which a detachable hitch is provided in each of the lifting link device and the working machine unit, and the working machine unit is mounted on a traveling vehicle body by docking both hitches. When installing the working machine part in this kind of agricultural work machine,
The working machine is held at a predetermined height on a trolley or the like, the traveling body is stopped so that the link side hitch is positioned below the working machine side hitch, and the lifting link device is raised and operated by hydraulic pressure or the like. And both hitches dock.

[0003]

However, if the relative positions of the two hitches are improper, the two hitches may not be completely docked. Very dangerous.
An object of the present invention is to prevent such a situation.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, the agricultural work machine according to the present invention is a farm work machine in which the work machine unit is detachable from the lifting link device for lifting and lowering the work machine unit provided on the traveling vehicle body, an elevating operation tool that raises the work machine unit to the uppermost position, Detecting means for detecting whether or not the working machine unit is completely mounted on the lifting link device; and when the detecting means detects that the working machine unit is not completely mounted on the lifting link device, the lifting / lowering operating tool And control means for controlling the working machine unit so as not to rise to the uppermost position even if the user operates.

[0005]

Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are general views of a riding type rice transplanter, which is an example of an agricultural work machine. This riding type rice transplanter 1 has an eight-row planting through a lifting link device 3 behind a traveling vehicle body 2. Attached part (working machine part) 4 is mounted so as to be able to move up and down.
And a fertilizer feeding section 5b for feeding the fertilizer for each strip.

The traveling vehicle body 2 comprises a pair of left and right steering front wheels 6, 6 which are driven and rotated, and a pair of left and right rear wheels 7, 7 which are driven and rotated.
The engine E is mounted on a frame 9 that extends rearward from the back of the transmission case 8. The rotational power of the engine E is transmitted once by the first belt transmission 10 to a hydraulic pump mounted on the upper part of the transmission case 8, and then transmitted to the transmission case 8 by the second belt transmission 11 capable of continuously variable transmission operation. . After being shifted by the main transmission in the case, the traveling power is transmitted to the front wheels 6, 6 and the rear wheels 7, 7, and the externally extracted power is transmitted via the planting clutch 12 to the traveling vehicle body. Power is transmitted from the PTO shaft 13 provided at the rear to the planting section 4 via the planting transmission shaft 14.

Reference numeral 16 in the figure denotes a seat on which the operator sits,
Is a floor step for the operator to move, 18 is a steering wheel for steering the front wheels 6 and 6, 19 is a main transmission lever for operating the main transmission, and 20 is the second belt transmission 11 Gearshift lever for operating the
1 is a planting position lever for operating the raising and lowering of the planting section 4 and turning on and off the planting clutch 12, and 22 is a finger up for switching the position of the planting section 4 between the working position and the uppermost position during work. A lever 23 is a control unit 6 that controls various controls.
An operation box 7 (see FIG. 3) is built in, and a spare seedling table 24 is provided rotatably in a horizontal plane.

The lifting link device 3 includes an upper link 3 attached to a link base 30 fixed to the rear end of the frame 9 of the traveling vehicle body 2.
1 and the lower links 32, 32 are attached rotatably,
A link side hitch 33 is connected to the rear ends of these upper and lower links. The planting section 4 is mounted by connecting the planting section side hitch 35 to the link side hitch 33.
Lift hydraulic cylinder 3 for driving lift link device 3
The base 6 has its base side pivotally connected to the frame 9, and its piston rod side is connected via a spring to the distal end of an arm 37 integrally fixed downward from the base of the upper link 31. When the hydraulic lifting cylinder 36 expands and contracts, the upper and lower links 31, 32, 32 are connected to the link base 30.
Around the supporting shaft on the side, and the planting portion 4 moves up and down. The operation of the hydraulic lift cylinder 36 is controlled by a hydraulic lift valve 38 provided on the left side of the engine E.

The planting portion 4 is rotatably supported by a rolling shaft 40 projecting rearward from the lower end of the planting portion side hitch 35, and is freely rotatable with respect to the traveling vehicle body 2. To prevent the planting part 4 from rolling suddenly, the planting part side hitch 35 and the right and left rods 41, 41 provided on the transmission case 56 of the planting part 4 are restricted springs 42, 41.
It is tied at 42.

The planting section 4 has an eight-row planting structure.
, A first seedling take-out device 51, ..., a first seedling transfer device 52, ..., a second seedling take-out device 53, ..., and a second seedling transfer device 54. ,..., Etc., provided on each section, and the power on the traveling vehicle body side is transmitted to the transmission case 56 from an input shaft 56 a which is transmission-coupled to the rear end of the planting transmission shaft 14. Then, each of the above devices is driven via a transmission mechanism in the transmission case.

A plurality of pot seedling-type seedling boxes are loaded into each seedling box transporting device 50,... And the first seedling extracting devices 51,. Seedlings are extruded all at once. The extruded seedlings are conveyed by the first seedling conveying devices 52,... Along a locus that draws an arc forward and are pulled out onto the second seedling conveying devices 54,. It is. The extracted seedlings
By the second seedling transfer devices 54,..., The left and right halves are laterally fed into the left and right seedling collecting portions, and the seedlings conveyed to the seedling collecting portions are transferred to the seedling planting devices 55, 55,. Planted in.

Below the planting section 4, four floats 57,... These floats
Rear ends of float support arms 57b,... (Shown in FIGS. 8 and 9) provided integrally with a planting depth adjusting pipe 57a (shown in FIGS. 8 and 9) rotatably supported by the transmission case 56. The front end is mounted to be swingable up and down, and is slid while leveling a field scene during planting work. On each of the left and right sides of each of the floats, groove-forming devices 59,... For forming fertilizing grooves in the field scene near the seedling planting position of each strip are attached.
The fertilizer application guides 5c,. The fertilizer guides 5c,... Are connected to the tips of fertilizer hoses 5d, which transport the fertilizer fed from the fertilizer feeding devices 5b,..., So that the fertilizer is dropped into the fertilizer grooves. .

FIG. 3 is a block diagram showing the structure of an elevation control device for controlling the elevation of the planting section. The elevation control device 60 includes a planting position lever for detecting the operating position of the planting position lever 21. A sensor 61, a finger-up lever sensor 62 for detecting the operation position of the finger-up lever 22, an elevating link sensor 63 for detecting the amount of rotation of the upper link 31, and the angle of attack of the central floats 57, 57 (the angle of the float with respect to the horizontal plane) And the connector 65a of the harness 65 connected to the electric circuit of the traveling vehicle body and the connector 66a of the harness 66 connected to the electric circuit of the planting part are connected. Is input to the controller 67, and the controller 67 outputs to the hydraulic elevating valve 38 based on the information. To. Specifically, control is performed as follows.

(1) When the planting position lever 21 is operated to "planting" located at one end of the operation range, the planting portion 4
Descends to the work position, and performs the below-ground lift control. When the planting position lever 21 is operated to a “position” other than the above “planting”, the planting section 4 moves up and down to a position (height) corresponding to the operated position. The position of the planting section 4 is read from the value of the lifting link sensor 63. When the planting position lever 21 is operated to “plant”, the planting clutch 12 is turned “on”, and when the planting position lever 21 is operated to “position”, the planting clutch 12 is turned on.
Is turned off.

(2) The finger-up lever 22 is operated by a finger on the "up" or "down" side starting from the neutral position, and is automatically returned to the neutral position when the finger is released from the lever. ing. This finger up lever 22
Is operated to raise the planting section 4 to the uppermost position. Further, when the operation is set to “down”, the planting section 4 is lowered to the work position, and the below-described ground elevation control is performed. When the planting section 4 is at the working position, the planting clutch 12 is turned on, and when the planting section 4 is at any other position, the planting clutch 12 is turned off.

(3) When the planting section 4 is in the working position,
An elevation control to the ground based on information of the float attack angle sensor 64 is performed. That is, when the front portions of the central floats 57 and 57 move upward to reduce the angle of attack, the hydraulic lifting cylinder 36
The hydraulic elevating valve 38 is operated in the direction in which the hydraulic elevating valve 38 is operated in a direction in which the hydraulic elevating cylinder 36 is contracted when the front part of the floats 57, 57 moves downward to increase the angle of attack. Thus, during the planting operation, the planting section 4 is always maintained at a constant height with respect to the field scene.

(4) When the connector 65a of the harness 65 and the connector 66a of the harness 66 are not connected, even if the finger-up lever 22 is operated to "up" or "down", the planting section 4 does not move up and down. It has become. However, when the finger-up lever 22 is continuously operated to “up” or “down”, the planting section 4 may be configured to move up and down in accordance with the operation time.

Next, the structure of the hitches 33, 35 (see FIG. 4) for mounting the planting portion and the transmission shaft 14 (see FIG. 5) will be described.

The link side hitch 33 is provided with an engaging member 33a having a concave upper side at an upper portion, and engaging members 33b, 33b having a concave rear side at a lower portion. on the other hand,
The planting part side hitch 35 is provided with the engaging members 33a, 33b,
The engagement pins 35a, 35b, 35 are located at positions corresponding to 33b.
b. Then, the engaging members 33a, 33b, 3
By engaging the engagement pins 135, 35b, 35b with 3b, the two hitches 33, 35 are connected.

The link side hitch 33 has an engaging member 33
Fixing hooks 33c, 33c for fixing the engaging pins 35b, 35b so as not to come off from the b, 33b are provided. The fixing hooks 33c, 33c are rotatably supported, and are urged by torque springs 33d, 33d to the side for fixing the engaging pins 35b, 35b. The operation of the fixed hooks 33c, 33c is performed by the detachable levers 33e, 33e integrated therewith.

The pivot 35c of the hitch 35 on the planting section side
A pair of left and right rolling lock arms 35d, 35d are provided so as to operate integrally, and a rolling lock release lever 3 is provided at the base of one of the rolling lock arms 35d.
5e is fixed, and the other rolling lock arm 35d
A rolling lock spring 35f for urging the rotating shaft 35c in a direction for rotating the rolling lock release lever 35e forward is attached to the base of the roller. When the planting part side hitch 35 is separated from the link side hitch 33,
The rolling lock arms 35d, 35d abut against the rolling stoppers 35g, 35g fixed to the planting section 4, and the rolling of the planting section 4 is locked. For this reason, the planting part side hitch 35 is kept horizontal left and right, and the mounting work can be easily performed. When the planting part side hitch 35 is connected to the link side hitch 33, the rolling lock releasing arm 33f provided on the link side hitch 33 pushes the rolling lock releasing lever 35e, so that the rolling lock arm 3
5d and 35d are separated from the rolling stoppers 35g and 35g, so that the planting portion 4 can be rolled.

The planting transmission shaft 14 is composed of an inner shaft 14a on the running vehicle body side and an outer shaft 14b on the planting portion side, which are slidably fitted to each other by splines.
The inner shaft 14a and the PTO shaft 13, and the outer shaft portion 14b and the planting portion input shaft 56a are connected by joints 70, 70 so that the angle can be changed. The sleeve 70a of the joint 70 and the PTO shaft 13 or the planting portion input shaft 56a are fitted with a spline, and are locked by balls 71,. Ball 7
Are housed in radial communication holes 72 formed in a sleeve 70a, and are disposed between a fixed ring 73 fixed to the sleeve 70a and a slide ring 74 slidable in the axial direction with respect to the sleeve 70a. Are pressed into the communication holes 72 by a ball pressing body 76 elastically fixed by a spring 75. Code 7
7 is an inner cover attached to the inner shaft 14a, 78 is the outer shaft 14
b is the outer cover attached. Further, the slide ring 74 on the planting portion side includes a chain 79 for attaching and detaching the planting transmission shaft.
At 79, it is connected to the link side hitch 33.

When removing the planting section 4, the planting section 4 is raised to an appropriate height, and a planting section mounting cart 90 and the like described below are installed below the planting section 4. Further, a connector 65a of the traveling vehicle body side harness 65 and a connector 66 of the planting portion side harness 66 are provided.
Disconnect connection a. And the detachable levers 33e, 3
3e, the fixing of the engaging pins 35b, 35b by the fixing hooks 33c, 33c is released.
Is rotated backward about the engagement pin 35a, the engagement between the engagement members 33b, 33b and the engagement pins 35b, 35b is released. Next, when the raising / lowering link device 3 is lowered, the planting portion 4 is supported by the planting portion mounting cart 90 or the like. When the lifting / lowering link device 3 is further lowered, the engagement between the engaging member 33a and the engaging pin 35a is performed. And the link side hitch 33 and the planting section side hitch 35 are separated.

Further, by separating the link side hitch 33 and the planting portion side hitch 33, the slide ring 74 on the planting portion is pulled by the chains 79, 79 and the planting transmission shaft 1 is moved.
4 to the side 71, and the balls 71,.
Is released, the engagement between the sleeve 70a and the planting portion input shaft 4a is released, and the planting portion input shaft 4a comes off from the sleeve 70a. As shown in FIG. 6, the planting transmission shaft 14 that has come off from the planting portion input shaft 4 a is connected to chains 79, 79.
Is suspended.

When the planting section 4 is to be mounted, the planting section 4 is placed horizontally on a planting section mounting cart 90 or the like, and the planting section 4 is mounted.
Back the traveling vehicle body 2 toward the
The traveling vehicle body 2 is stopped at a position where is below the planting section side hitch 35. In this state, when the lifting link device 3 is operated upward by operating the planting position lever 21 or the finger up lever 22, first, the engaging pin 35a is engaged with the engaging member 33a, and then the planting portion 4 is moved upward. The planting portion 4 is lifted up and pivots forward with the engaging pin 35a as a fulcrum, and the engaging pins 35b, 35b ride over the fixing hooks 33c, 33c to engage with the engaging members 33b, 33b.
And the link side hitch 33 and the planting portion side hitch 35 are docked. And the sleeve 7 of the planting transmission shaft 14
0a and the planting part input shaft 4a, and the connector 65a of the traveling vehicle body harness 65 and the planting part side harness 66
When the connector 66a is connected, the mounting of the planting section 4 is completed.

As described above, the harness connectors 65a,
When the finger 66a is not connected, even if the finger-up lever 22 is operated, the planting section 4 does not move up and down. It is safe without doing. As a detection means for detecting whether or not the working machine unit is completely mounted on the lifting link device, as shown by a chain line in FIG. When the switch is OFF, the planting section 4 may not be moved up and down even when the finger-up lever 22 is operated.

FIG. 7 shows an example of the planting section mounting cart. The planting section mounting cart 90 has the moving wheels 9 at the four corners.
An undercarriage frame 92 having a rectangular shape in a plan view to which 1,... Are attached.
And a rotating frame 94 having a rectangular shape in a plan view and rotatably supported on the chassis frame so as to be rotatable around a left-right inclined rotating shaft 93. The rotating frame 94 includes front supporting legs 95, 95 and rear supporting legs. 96, 96, 96 are fixed. Front support leg 95
At the upper end of the transmission case 56b,
Receiving portion 9 for receiving front frame 56c connecting front portions of...
5a, and a receiving portion 96a for receiving the planting depth adjusting pipe 57a is provided at the upper end of the rear support leg 96. Further, the rear support leg 96 has a structure in which an outer square pipe fixed to the rotating frame 94 and an inner square pipe to which the receiving portion 96a is attached are slidably fitted to each other, and are entirely expandable and contractable. The front portion of the chassis frame 92 and the front portion of the rotating frame 94 are connected by a telescopic link 97, and the rotating frame 94 is fixed in a fixed posture. By turning the tilt adjusting handle 98 to change the length of the telescopic link 97, the tilt of the rotating frame 94 can be adjusted.
On the chassis frame 92, there are regulating pins 99, 99 for regulating the rotating frame 94 so as not to be inclined backward more than a certain angle.
Is provided.

When the planting section 4 is to be removed from the traveling vehicle body 2, as shown in FIG. 8, the planting depth adjusting pipe 57a of the planting section 4 held at an appropriate height has the rear support leg extended. 9
6, receiving portions 96a, and fixing pins 96b,.
The lowering link device 3 is operated in a state where the planting depth adjusting pipe 57a is fixed to the receiving portions 96a,. Then, at the initial stage, the rear support legs 96,... Gradually contract, and when the rear support legs are in the most contracted state, the planting section 4 is tilted forward, and the front support legs 95, 95 are moved forward by the front frame 56c. To receive. By tilting the planting part 4 forward,
Engaging members 33b, 33 of hitches 33, 35 for attaching planting section
b is automatically disengaged from the engagement pins 35b, 35b. When the lifting link device 3 is lowered as it is,
The engagement between the engagement member 33a and the engagement pin 35a is released, and the hitches 33 and 35 are separated. When attaching the planting section 4, the reverse operation may be performed. As described above, the use of the planting portion mounting cart 90 facilitates the work of attaching and detaching the planting portion 4.

When the planting section 4 is removed from the traveling vehicle body 2, the tilt adjusting handle 98 is operated to move the fixed frame 9
4. Tilt 4 back appropriately. Then, as shown in FIG. 9, the planting section 4 is in a standing state, the center of gravity of the planting section 4 is positioned at the center of the planting section mounting cart 90, and the front and rear of the planting section 4. Since the length can be reduced, it is convenient for transportation and storage.

[0030]

As is apparent from the above description, the agricultural working machine according to the present invention is capable of raising and lowering the working machine unit to the uppermost position when the working machine unit is not completely mounted on the lifting link device. Even when the tool is operated, the work equipment is controlled so as not to rise to the uppermost position, so that an accident at the time of attachment and detachment of the work equipment can be prevented beforehand.

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is an overall plan view of the riding type rice transplanter.

FIG. 3 is a block diagram of a lifting control device.

FIG. 4A is a side view and FIG. 4B is a rear view of the hitch for attaching a planting portion.

FIG. 5 (a) is a side sectional view of a planting transmission shaft and a peripheral portion thereof;
And (b) S1-S1 sectional view.

FIG. 6 is a side view of the lifting link device with the planting portion removed and the planting transmission shaft.

7A is a plan view and FIG. 7B is a side view of the planting section mounting cart.

FIG. 8 is a side view showing a state of the attaching / detaching work of the planting section.

FIG. 9 is a side view showing a state in which the planting section is being transported or stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter (agricultural work machine) 2 Traveling vehicle body 3 Elevating link device 4 Planting part (working machine part) 14 Planting transmission shaft 21 Planting position lever 22 Finger up lever (elevating operating tool) 35 Planting part side hitch 36 Hydraulic Elevating Cylinder 38 Hydraulic Elevating Valve 60 Elevating Controller 61 Planting Position Lever Sensor 62 Finger Up Lever Sensor 63 Elevating Link Sensor 64 Float Intercept Angle Sensor 65, 66 Harness 65a, 66a Connector (Detecting Means) 67 Control Unit (Control Means) ) 90 Planting part mounting trolley

Claims (1)

[Claims] An agricultural work machine in which a working machine unit is detachable from a lifting link device for lifting and lowering the working machine unit provided on a traveling vehicle body,
A lifting / lowering operating tool for raising the working machine unit to the uppermost position, a detecting means for detecting whether or not the working machine unit is completely attached to the lifting / lowering link device; And a control means for controlling, when it is detected that the work implement unit is not mounted on the work implement, so that the work implement unit does not move up to the uppermost position even when the elevation operation tool is operated.