JP2589712Y2 - Horizontal control device for walking type rice field work machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal control device for a walking type rice field working machine such as a rice transplanter, a fertilizer applicator, and a seeder.

[0002]

2. Description of the Related Art
In this type of walk-behind field work machine, when performing horizontal control of the body by forcibly swinging a balance arm having left and right running wheels connected to both ends thereof by operating a hydraulic cylinder, a valve device of the hydraulic cylinder is used. In some cases, switching is automatically performed based on detection of a horizontal detecting object such as a pendulum. However, since the horizontal detecting body is sensitive to slight rolling of the body and vibration of the body, there is a possibility that the accuracy of the work may be reduced on a ridge or the like having many irregularities. Therefore, there have been proposed ones that release the horizontal control by locking the balance arm and ones that release the horizontal control by simultaneously locking the balance arm and the horizontal sensing element. The operability is inferior, and the locking mechanism of the balance arm is configured to lock the balance arm in a horizontal position. Was the actual situation.

[0003]

SUMMARY OF THE INVENTION The present invention has been conceived in view of the above-mentioned circumstances, and has as its object to provide a horizontal control device for a walking type field working machine which can eliminate these disadvantages. In order to perform horizontal control of the airframe by forcibly swinging the balance arm to which the left and right traveling wheels are connected at both ends by operating the horizontal control hydraulic cylinder, the valve device of the horizontal control hydraulic cylinder is horizontally The balance arm is locked in a horizontal position by a walking type paddle working machine that automatically switches based on the detection
Balance lock mechanism for canceling flat control and horizontal sensing object neutral
Detector lock mechanism that locks to the posture and releases horizontal control
And are provided so that they can be operated independently of each other.
Also, the valve device includes a hydraulic cylinder for horizontal control.
Manual switching means for performing manual switching of
It is characterized in that there. According to the present invention, with this configuration, the aircraft is automatically level-controlled based on the detection of the level-sensing object. , The horizontal inclination of the body can be adjusted steplessly, so that the work accuracy at the ridge and the like can be improved .

[0004]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a walking type rice transplanter which is an example of a walking type rice field working machine.
While the engine 2 and the transmission case 3 are integrally disposed vertically, a planting work section 6 including a seedling mounting table 4, a planting mechanism 5 and the like is disposed at the rear of the machine body. Running wheels 9 are provided on the left and right sides of the transmission case 3 via a swing case 8 supported on an output shaft 7 projecting from the left and right side surfaces of the transmission case 3 so as to be vertically swingable. Then, the power of the engine 2 is transmitted to the planting work section 6 and the traveling wheels 9 via the transmission case 3, and all of these basic configurations are conventional.

[0005] Reference numeral 11 denotes a return-type main cylinder device.
The main cylinder device 11 is composed of a piston rod 11a, a cylinder cylinder 11b, and the like, and is arranged at a position in front of the engine 2 and the transmission case 3 in a nearly vertical posture in which the front and rear are steeply inclined. One end of the piston rod 11a is integrally fixed to the upper end of the engine 2 via a bracket (not shown), and the other end is a bracket 13 projecting forward from the front end of the transmission case 3. In this case, the cylinder cylinder 11b is fixed to the body by being hydraulically operated so that the cylinder cylinder 11b moves with respect to the piston rod 11a.

Reference numeral 14 denotes a balance arm which is long in the left-right direction, and an intermediate portion of the balance arm 14 is pivotally supported by a pin shaft 15 projecting forward and backward from the upper end of the cylinder cylinder 11b. On the other hand, the right and left ends of the swing arm 8 projecting from the base boss portion 8a of the swing case 8 by a connection rod 17 pivotally connected via a connection pin 16.
b. As will be described later, the balance arm 14 is pushed and pulled in a parallel posture in conjunction with the vertical movement of the cylinder cylinder 11b accompanying the operation of the main cylinder device 11, whereby the swing case 8 simultaneously swings up and down. Then, the left and right traveling wheels 9 are simultaneously moved up and down with respect to the body.

On the other hand, reference numeral 19 denotes a sub-cylinder device. The sub-cylinder device 19 is interposed between the cylinder cylinder 11b of the main cylinder device 11 and the balance arm 14, and based on the expansion and contraction operation thereof, The left and right running wheels 9 are moved up and down in the opposite direction by forcibly swinging the pin shaft 15 as a fulcrum to perform horizontal control of the fuselage. It is arranged in parallel near one side.

Numeral 21 denotes a hydraulic valve unit for switching the operation of the two cylinder devices 11, 19, and a bracket 21a protruding from the upper end of the valve unit 21 toward one side is provided with a two cylinder device. The upper end of a pendulum 22 disposed so as to be located immediately behind the positions 11 and 19 and substantially at the center in the left-right direction of the fuselage is pivotally supported so as to be able to swing left and right. In this pendulum 22, the upper half portion 22a has a rod shape,
The lower half 22b has a shape bulging in the left-right direction,
Further, on the lower surface of the lower half portion 22b, a concave portion 22c is formed at a central portion in the left-right direction, and both left and right end portions have a shape protruding downward. On one side of the valve unit 21, a sub-cylinder control spool 23 is protrudingly protruded and retracted, and its tip is pivotally connected to an intermediate portion of the pendulum upper half 22a without a link or the like. . That is, when the body is tilted left and right, the tilt is detected by the left and right swing of the pendulum 22, and this detection is transmitted to the valve unit 21 via the spool 23 to extend and contract the sub cylinder device 19. The inclined aircraft is returned to the original proper horizontal position. The valve unit 21 of the present invention is provided with a manual switching means for operating the sub-cylinder device 19 based on a manual operation.

A spool (not shown) for controlling the main cylinder is projected from the valve unit 21. The spool is connected to a float 24 for detecting the floating of the body. In other words, when the airframe rises and sinks, the floatation is detected by the float 24, and this detection is transmitted to the valve unit 21 via the spool to operate the main cylinder device 11 to allow the airframe to return to its original proper state. It returns to the posture.

Reference numeral 25 denotes a balance locking mechanism for locking the balance arm 14 in a horizontal position. The balance lock mechanism 25 includes a bracket 26 integrally projecting from the balance arm 14, and the bracket 26. A lock plate 27 fixed to the cylinder cylinder 11b so as to face the tip of the lock plate 27, a lock pin 28 provided on a bracket 26 for engaging and disengaging with an engagement hole 27a of the lock plate 27, and the lock pin 28 always facing the engagement side. And a lock operation lever 31 connected to the lock pin 28 via a connection wire 30, a lever fixing device 32 for fixing the lock operation lever 31 at a gripping position, and the like. In other words, when the lock operation lever 31 is not operated, the lock pin 28 is engaged with the lock plate 27, and the swing of the balance arm 14 is locked. The balance arm 14 is allowed to swing out of the lock plate 27.

On the other hand, reference numeral 33 denotes a pendulum rocking mechanism for locking the pendulum 22 to a neutral position. 35 support the front and rear freely. That is, a pair of hook plates 34a respectively engaging the left and right bumper stays 35 from the side are integrally fixed by bolts 34b. However, when the lock member 34 is located on the front side, the pendulum 22 is detected. While allowing swinging,
When the locking member 34 is located on the rear side, a pair of left and right locking pieces 34 c protruding from the locking member 34 are attached to the pendulum 2.
In this case, the pendulum 22 is loosely fitted in the second concave portion 22c to restrict the detection swing of the pendulum 22. On the lower surface of the locking member 34, a positioning pin 34d facing in the left-right direction is fixed. The positioning pin 34d is formed by a front and rear groove 36a of a guide plate 36 provided opposite to the lower surface of the locking member 34. , 36b to hold the locking member 34 at a front unlocking position and a rear locking position.

Further, one end of the locking member 37 is
4, the connecting rod being connected to the connecting rod 37.
The locking member 34 can be operated between the unlocking position and the locking position by pushing and pulling, but the other end of the connecting rod 37 is operatively connected to an operating tool (not shown) different from the locking operation lever 31. For this reason, the pendulum locking mechanism 33 and the balance locking mechanism 25 can be operated independently of each other.

In the embodiment of the present invention constructed as described above, there are provided a balance lock mechanism 25 for locking the balance arm 14 in a horizontal position, and a pendulum lock mechanism 33 for locking the pendulum 22 in a neutral position. Mechanism 25, 3
Since the horizontal control 3 releases the horizontal control by performing a lock operation by different operations, the operation for releasing the horizontal control can be selected and the operability can be improved.

Further, when only the pendulum locking mechanism 33 is operated to allow the swing of the balance arm 14,
The balance arm 14 is manually operated by the sub cylinder device 19.
Swings, and the horizontal inclination of the machine body can be adjusted steplessly based on the swing of the balance arm 14. Accordingly, even if the temporary command horizontal control is released, the left and right running wheels 9 are not locked in the horizontal posture as in the related art, and the body inclination can be freely adjusted according to the inclination of the field. the aircraft also in the slope can be performed with high work of precision in operation in a horizontal attitude of.

The present invention is, of course, not limited to the embodiment described above.
Without being limited to the pendulum, a general-purpose tilt sensor, a tilt detection float, or the like may be used.

[0016]

[Effects] In summary, since the present invention is constructed as described above, the balance arm having left and right running wheels connected to both ends thereof is forcibly rocked based on the detection of the horizontal detection body. Horizontal control of the
When it is desired to release the horizontal control, it is sufficient to lock either the balance locking mechanism or the detecting body locking mechanism, and the horizontal control releasing operation has a margin of selection, thereby improving the operability. In addition, since these locking mechanisms can be locked independently of each other, in addition to those that can lock the body and the running wheels in a horizontal position, as in the case of locking the balance locking mechanism, the detection body locking mechanism As in the case where the balance is locked, the balance arm can be locked in a state where swing of the balance arm is allowed, and in this locked state, the horizontal inclination of the body is steplessly adjusted based on the manual switching operation of the horizontal control hydraulic cylinder. Can be adjusted. As a result, when the locking by the detection body locking mechanism is performed, the horizontal control is released, and further , the body inclination is manually adjusted according to the inclination of the field.
It is possible to improve the work accuracy by maintaining the aircraft in a horizontal posture even on an inclined land such as a ridge.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rice transplanter.

FIG. 2 is a plan view showing a balance locking mechanism.

FIG. 3 is a front view showing a valve unit and a pendulum.

FIG. 4 is a plan view of a pendulum locking mechanism.

FIG. 5 is a front sectional view of the same.

FIG. 6 is a sectional side view of the same.

FIG. 7 is a perspective view of a main part showing a locked state of the pendulum.

FIG. 8 is a perspective view of a main part showing the unlocked state of the pendulum.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Engine 3 Transmission case 6 Planting work part 9 Wheel 11 Main cylinder device 14 Balance arm 19 Secondary cylinder device 21 Hydraulic valve unit 22 Pendulum 25 Balance lock mechanism 33 Pendulum rock mechanism

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-117411 (JP, A) JP-A 61-37735 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01C 11/02 334

Claims (1)

(57) [Scope of request for utility model registration] 1. A valve device for a hydraulic cylinder for horizontal control in order to perform horizontal control of an airframe by forcibly swinging a balance arm having left and right running wheels connected to both ends thereof by operation of a hydraulic cylinder for horizontal control. The balance arm is locked in a horizontal position by a walking type paddle working machine that automatically switches based on the detection of the horizontal
Lock the balance lock mechanism to release and the horizontal detector to the neutral position.
A lock mechanism for detecting object that releases the horizontal control
In addition to being provided so that they can be operated independently,
The valve device has a manual shut-off of a hydraulic cylinder for horizontal control.
A horizontal control device for a walk- behind field work machine, wherein a manual switching means for changing is provided .