JPH06237601A - Rice paddy working machine - Google Patents

Abstract

(57) [Summary] [Purpose] By making more effective use of the functions of the riding type rice transplanter, it is possible to form a drainage groove with a stable depth, and also to easily adjust the depth if necessary. To be able to do it. [Structure] Elevating link mechanism 4 provided at the rear of the traveling machine body
In a paddy field working machine in which a working device 6 for forming a drainage groove is connected in place of the seedling planting device, the working device 6 controls a groove cutting plate 10 and a hydraulic cylinder that drives the lifting link mechanism 4. It is equipped with a grounding float 13 linked to the means, and is configured to drive and control the lifting link mechanism 4 based on the vertical displacement of the grounding float 13 to maintain the working device 6 at a predetermined height with respect to the field scene. A working depth adjuster 21 for changing and adjusting a reference height of the ground float 13 with respect to the grooved plate 10 is provided so as to be operable from a driving seat of the traveling machine body 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paddy field working machine for forming drainage gutters for medium drying in a paddy field after planting.

[0002]

2. Description of the Related Art As a paddy field working machine, a lifting link mechanism provided at a rear portion of a traveling machine body is connected to a working device for forming a drainage groove in place of a seedling planting device, so that the versatility of a riding type rice transplanter is improved. There is a proposal to increase the height (Japanese Patent Application Laid-Open No. Hei 4).
-210501).

[0003]

In the above-mentioned conventional paddy field working machine, the elevating link mechanism is adjusted and fixed to an arbitrary height so that the working apparatus is placed at the opposite height, that is, the depth of the drainage groove formed by the groove plate. Since the setting was made, the height of the working device at the rear of the fuselage changes with the sinking of the fuselage and the change in the front-rear inclination, and the depth of the drainage groove changes. Had to adjust the lifting link mechanism up and down, which was troublesome. The present invention has been made by paying attention to such a situation, more effectively utilizing the function of the riding type rice transplanter, and enables the formation of a drainage groove with a stable depth. The purpose is to make it possible to easily adjust the depth if necessary.

[0004]

A characteristic structure of the present invention for achieving the above object is to connect a working device for forming a drainage groove to a lifting link mechanism provided at a rear portion of a traveling machine body, instead of a seedling planting device. In the paddy working machine, the working device is equipped with a grooved plate and a grounding float linked to a control means of a hydraulic cylinder for driving the lifting link mechanism, and the lifting link is based on vertical displacement of the grounding float. A working depth adjuster for driving and controlling the mechanism to maintain the working device at a predetermined height with respect to a field scene, and for changing and adjusting the reference height of the grounding float with respect to the grooved plate is provided as a traveling machine body. The point is that it is equipped so that it can be operated from the driver's seat.

[0005]

According to the above construction, when the subsidence or the front-back inclination of the traveling body is about to change due to the change of the cultivator in the field, the grounding float in the working device at the rear of the body is vertically displaced, and the lifting link mechanism is driven based on this. The hydraulic cylinder is controlled so that the height of the work device above ground is kept constant, and a drainage groove having a stable depth is continuously formed. In addition, by operating the working depth adjuster from the driver's seat to change and adjust the reference height of the ground float with respect to the grooved plate, the depth of the drainage groove can be arbitrarily changed during operation according to the soil quality of the field. After that, the drainage groove with the changed depth is stably formed continuously.

[0006]

According to the present invention, therefore, the drainage ditch having a stable depth can be easily and easily utilized by effectively utilizing the lifting control means of the lifting link mechanism, which is a function originally possessed by the riding type rice transplanter. In addition to the shape 1, it is possible to arbitrarily change the groove depth according to the field conditions even during operation, and it is possible to further improve workability.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire working machine for paddy fields using a riding type rice transplanter. This paddy field working machine is equipped with an elevating link mechanism 4 driven by a hydraulic cylinder 3 at the rear part of a traveling machine body 2 having a driving seat 1. Originally, as shown in FIG. A seedling planting device 5 with a fertilizer application is connected to the rear end of the plant to be used as a rice transplanter for multi-row planting. Here, instead of the seedling planting device 5, a working device 6 for forming a drain groove is connected. . As shown in FIGS. 2 to 4, the working frame 8 is mounted on the connecting frame 7 connected to the rear vertical link 4a of the elevating link mechanism 4 so as to be able to roll around the longitudinal axis P, and the work frame 8 is horizontally mounted. The tool bar 9 has a structure in which a pair of grooving plates 10 are attached to the tool bar 9 at predetermined left and right intervals, and a plurality of weights 12 are attached to a bracket 11 provided on the rear portion of the work frame 8, and below the work frame 8. The working device 6 is configured by arranging a grounding float 13 as a grounding sensor that controls the automatic work height control. A float support arm 15 that is vertically swingable around a fulcrum Q is provided at the lower end of a bracket 14 extending downward from the work frame 8.
Is supported, and the rear portion of the ground float 13 is pivotally connected to the free end of the float support arm 15, and
The front part of the ground contact float 13 is supported by the work frame 8 via a bending and stretching link 16. Further, the sensor rod 18 extends upward from the rear end of the link 17 pivotally supported at the fulcrum R on the float side of the flexion / extension link 16, and the front part of the ground float 13 is extended by the coil spring 19 fitted on the sensor rod 18. Is being urged downward. Further, the front end of the link 17 and the control valve V for the hydraulic cylinder 3 are linked by a release wire 20, and when the front portion of the ground float 13 is displaced upward beyond the coil spring 19 by more than a set range, the control valve V is released. When the working device 6 is raised by switching from the neutral position N to the raising position U and the front part of the grounding float 13 is displaced below the set range, the control valve V is switched from the neutral position N to the lowering position D and the working device 6 is moved. Is lowered, and thus a control means for stably maintaining the height of the work device 6 with respect to the field is configured. An operating lever 21 as a working depth adjusting tool extends forward and upward from the float supporting arm 15 that supports the rear portion of the grounding float 13, and the operating lever 21 is locked and held in a plurality of stages. A lever guide 22 is provided on the work frame 8. Therefore, the operating lever 2
1 is oscillated to operate the ground float 13 for the groove plate 10.
By changing and adjusting the height of the drainage groove, the depth of the drainage groove formed by the groove cutting plate 10 can be arbitrarily changed and adjusted.
The operation lever 21 is set to a length that allows an operator seated in the driver's seat 1 to reach and operate backward. Further, the outer wire end portion 20A of the release wire 20 on the side of the control valve V is supported by a sensitivity adjusting lever 23 that can be locked and fixed at a plurality of operating positions so that the position can be adjusted and fixed. When the position of the end portion 20A is adjusted to the control valve V side, the grounded float 13 in the control neutral state is changed in posture to the front downward direction, and the coil spring 19 at this reference position is lengthened to decrease the float downward biasing force. That is, the ground float 13 can be pushed up with a small ground pressure, and the control sensitivity is increased. Conversely, the outer wire end 2
When the position of 0A is adjusted to the side opposite to the control valve V, the attitude of the grounded float 13 in the control neutral state is changed in the forward rising direction, and the coil spring 19 at this reference position is shortened to increase the float downward biasing force. That is, unless the ground pressure is large, the ground float 13 cannot be pushed up and the control sensitivity is increased.

Reference numeral 24 in the drawing denotes a rolling neutral return spring stretched over the upper part of the connecting frame 7 and the left and right of the work frame 8, and 25 a pair of left and right stoppers extending forward from the work frame 8. When the lifting link mechanism 4 is raised, the ends of both stopper arms 25 contact the lower surfaces of the left and right lower links 4b of the lifting link mechanism 4, respectively, so that the working device 6 floats freely in the air. Function to block. Reference numeral 26 denotes a weight mounting bracket mounted on the upper rear end of the elevating link mechanism 4 via a support shaft 27. As shown in FIG. 2, when the working device 6 is connected, the connecting frame 7 is connected. Spindle 2 toward the front so that it does not get in the way of attaching and detaching
When the traveling vehicle body 2 is traveled with both the seedling planting device 5 and the working device 6 removed as shown in FIG. 6, a weight is attached in order to balance the front and rear weight of the machine body. Insert the bracket 26 into the support shaft 27 so that the bracket 26 projects rearward, and attach the weight 1 to the support shaft 27.
2 is attached. Further, the weight mounting bracket 26 is removed in a state where the seedling planting device 5 is mounted. Further, when the seedling planting device 5 is attached, the release wire 20 is connected to a sensor float provided in the seedling planting device 5 to form a lifting control device.

[Other Embodiments] When a raising / lowering control device of the seedling planting device 5 uses a rice transplanter electrically configured to detect the vertical displacement of the sensor float with a potentiometer, the vertical movement of the ground float 10 The displacement may be detected by a potentiometer, and this potentiometer may be connected to an originally equipped elevation control device for implementation.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an overall side view of a paddy field working machine according to the present invention.

FIG. 2 is a side view of a work device portion.

FIG. 3 is a rear view of the working device portion.

FIG. 4 is a plan view of a working device connecting portion.

[Fig. 5] Side view of the rear part of the fuselage with the seedling planting device connected

FIG. 6 is a side view of the rear part of the machine body when the traveling machine body is traveling alone.

[Explanation of symbols]

 1 Driver's Seat 2 Travel Vehicle 4 Lifting Link Mechanism 5 Seedling Planting Device 6 Working Device 10 Grooving Plate 13 Ground Float 21 Working Depth Adjuster

Claims (1)

[Claims] 1. Work for a paddy field in which a working device (6) for forming a drainage channel is connected to a lifting link mechanism (4) provided at the rear part of a traveling machine body (2) instead of a seedling planting device (5). In the machine, the working device (6) is equipped with a grooving plate (10) and a grounding float (13) linked to a control means of a hydraulic cylinder (3) for driving the lifting link mechanism (4), and grounded. The working mechanism (6) is configured to be maintained at a predetermined height with respect to the field scene by driving and controlling the lifting link mechanism (4) based on the vertical displacement of the float (13), and the grounding float (13). Paddy field characterized by being equipped with a working depth adjuster (21) for changing and adjusting the reference height with respect to the groove plate (10) of the traveling machine body (2) so as to be operable from the driver's seat (1). Working machine.