JP2907730B2 - Groove 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 grooving machine provided for grooving a drainage ditch in a field.

[0002]

2. Description of the Related Art A field after planting rice is not always kept in a watered state, but is sometimes drained and the mud surface of the field is exposed to air. As described above, drainage grooves are formed at intervals of several lines in a field after rice planting using a groove-making machine. Conventionally, as this type of groove making machine, a groove making body is installed on a traveling body so that the vertical position can be changed via an elevation drive device, and a pilot judges the groove depth while visually observing the groove making machine. Therefore, the drainage groove is formed so that the groove is artificially raised and lowered appropriately to generate a gradient.

[0003]

In the prior art, however, the grooves must be formed manually while visually observing the groove-making machine as described above, and the operator looks back from the cockpit to the rear of the machine with the groove-making machine. Doing the groove work in the state where
Since it is necessary to perform a lifting operation, the operation is troublesome. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a groove making machine capable of forming grooves in a state in which a burden on an operator can be reduced.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a groove forming machine according to the present invention is provided with a groove forming body for forming a drain groove in a field scene on a traveling body so as to be movable up and down by a lifting device. Detecting means for detecting a relative position between the groove body and the field scene, and the traveling body after the detection means detects that the groove body has entered the field scene at a set depth. Along with the traveling, the groove forming body is gradually raised or lowered, and groove forming control means for controlling the operation of the elevating device so as to perform groove forming with a predetermined gradient is provided. . The operation and effect of this characteristic configuration are as follows.

[0005]

In other words, a detecting means for detecting a relative position between a grooving body for forming a drainage groove and a field scene is provided, and after it is detected that the grooving body has entered the set depth into the field scene. By automatically raising or lowering the grooving body automatically with the travel of the traveling aircraft, the slope will be automatically generated in the drain groove, and the grooving body will be raised and lowered artificially There is no need to operate.

[0006]

Accordingly, the desired groove forming work can be performed without the need for the pilot operator to visually check the groove forming depth of the groove forming body one by one and manually adjust the groove depth. Since a drain groove having a slope can be formed, the pilot operator only has to perform the traveling operation, the operation becomes simple, and the operation efficiency can be improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a groove making machine. This trenching machine is provided with a trenching body 2 instead of a seedling planting device in a traveling machine 1 of a riding type rice transplanter.
Is mounted so as to be able to move up and down freely. That is, this groove making machine has a four-link mechanism 5 at the rear end of the traveling machine body 1 movably supported by a pair of left and right front wheels 3, 3 and rear wheels 4, 4 as a hydraulic cylinder 6 The four link mechanism 5 is mounted on the rear end of the quadruple link mechanism 5 via a mounting arm 7 so as to be freely movable.

As shown in FIGS. 1 and 2, a potentiometer 8 for detecting the vertical swing angle posture of the four-link mechanism 5 with respect to the traveling body 1 is provided at the shaft support of the four-link mechanism 5 in the traveling body 1. I have. The grooved body 2 is provided with a sensor bar 9 swingable around the horizontal axis, and a groove depth detecting potentiometer 10 as a detecting means for detecting the groove depth from the swing angle of the sensor bar 9. It has. Detection signals of the potentiometer 8 and the groove depth detecting potentiometer 10 are input to a control device 11 provided as a groove forming control means provided in the traveling machine body 1. The control device 11 includes a four-link mechanism 5 and a seedling planting device 1.
7 is attached (see FIG. 5), a float sensor 13 for detecting the floating and sinking of the seedling planting device 17 from the vertical swing amount of the leveling float 23, and a seedling planting device 17 based on the detection result of the float sensor 13. Signals are input from a sensitivity setting device 12 that artificially adjusts the control sensitivity when performing elevation control to maintain the height at a set height with respect to the field scene in accordance with the hardness of the field, and an elevation switch 15. At the same time, the control device 11 outputs a drive signal to the electromagnetic control valve 16 of the hydraulic cylinder 6.

Next, a description will be given of a groove forming operation using the above configuration. Prior to the groove work, the controller 1
1 is set to the groove forming operation mode, and in this groove forming operation mode, the signal from the sensitivity setting device 12 is substituted for the groove depth setting value. First, when the airframe is positioned at the end of the field and the elevating switch 15 is operated to the lowered position, the four-link mechanism 5 is controlled to be lowered and the grooved body 2 positioned in the air is controlled.
Descends and sinks into the field scene. When the groove forming body 2 sinks from the field scene to the set depth, this is detected by the groove depth detecting potentiometer 10 and the descent is temporarily stopped. Then, the output of the potentiometer 8 at this time, that is, the position of the quadruple link mechanism 5 at the time when the trench 2 sinks from the field scene to the set depth is stored as a reference value. Next, when the airframe is moved forward, a groove is formed by the movement of the grooved body 2 in the field, but as shown in FIG. A pulse signal for lowering is output from the control device 11 to the electromagnetic control valve 16 while feeding back the signal from the potentiometer 8 so that 5 is lowered by the set minute angle from the reference value. The depth of the formed groove automatically increases gradually. That is,
A drain with a predetermined slope is formed.
It is desirable that the gradient has a height difference of about 10 cm per 100 meters. In addition, as a method of giving the gradient, control may be performed such that the groove 2 is made to enter deeply at the start of traveling, and is raised so that the groove 2 gradually becomes shallower as the vehicle travels.

Next, means for limiting the traveling speed of the traveling machine body 1 when traveling on the road will be briefly described.
As shown in FIG. 5, in a case where the seedling planting device 17 is attached to the traveling body 1 and rice can be transplanted, when traveling on the road with the seedling planting device 17 removed from the traveling body 1, the seedling planting device is used. 17, the weight balance in the front-rear direction of the traveling body 1 is deviated to the front, so that stability in traveling is impaired.
Since the vehicle tends to become unstable when braking at high speed, the speed is limited. That is, as shown in FIG. 4, a wire harness 18 for transmitting signal lines from various sensors including the float sensor 13 provided in the seedling planting device 17 is connected by a pair of connectors 19A and 19B. But
Among the connectors 19A and 19B, the connector 19A of the traveling body is provided with a switch 20 for detecting whether or not both connectors 19A and 19B are connected, and the detection result of the switch 20 is transmitted to the control device. 11
To be communicated to. And the connector 19A,
When the connector 19B is connected, the switching operation unit 20a of the switch 20 is set to be in an off state by contact of the connector 19B, and is set to be in an on state when the connection of the connectors 19A and 19B is released. 19A, 1
By the ON signal of the switch 20 due to the disconnection of 9B, the control device 11 causes the belt-type continuously variable transmission 21 to operate only within a predetermined low speed range so that the maximum traveling speed does not exceed the predetermined speed. For this reason, the highest speed position of the shift actuator 22 that can be driven and controlled by the control device 11 is limited to a lower speed position.

[Another Embodiment] In a structure similar to that of the above embodiment, the control device 11
After lowering the groove forming body 2 to a predetermined depth position based on the detection of the groove depth detecting potentiometer 10, the four-step unit is moved with traveling without performing feedback control based on a signal from the potentiometer 8. Electromagnetic control valve 1 for supplying and discharging hydraulic oil to and from hydraulic cylinder 6 that drives link mechanism 5 up and down
6 to output a pulse signal of a predetermined width at regular intervals to gradually raise or lower the grooved body 2 to make a gradient in the drainage groove to be formed. Is also possible. In the embodiment, the groove depth detecting potentiometer 10 is used only when the groove forming body 2 enters the field scene at the start of the groove forming operation.
However, when the field scene is relatively flat, the groove forming body 2 is controlled to move up and down based on the detection result of the groove depth detecting potentiometer 10 so that the groove is formed. It is also possible to make a slope in the drain groove. As means for detecting the depth of the grooved structure 2 entering the field scene, a non-contact type using ultrasonic waves or the like may be used in addition to a contact type.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a trenching machine.

FIG. 2 is an explanatory diagram showing a control device and the like for performing elevation control of a grooved body

FIG. 3 is a graph showing an outline of a relationship between a pulse signal for raising and lowering a lifting device at the time of forming a groove and a groove depth driven by the pulse signal.

FIG. 4 is a side view showing a connector of a wire harness provided over the seedling planting device and the traveling body, wherein (a) shows a connector before connection, and (b) shows a connected connector.

FIG. 5 is an overall side view showing a riding rice transplanter equipped with a seedling planting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Running body 2 Groove body 6 Elevating device 10 Detection means 11 Groove control means

Claims (1)

(57) [Claims] A traveling machine (1) is equipped with a lifting device (6) so as to be able to move up and down by a lifting device (6). Detecting means (10) for detecting a relative position with respect to a surface, and the traveling body after the detecting means (10) detects that the grooved structure (2) has entered a set depth into a field scene. With the traveling of (1), the groove forming means (2) is gradually raised or lowered to perform groove forming with a predetermined gradient to control the operation of the lifting / lowering device (6). A groove making machine provided with 11).