JPH026721Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lifting/lowering switching device for a tillage work machine.

Conventionally, when plowing a field with a tillage machine such as a rotary tiller, once one stroke of plowing is completed, the tillage machine is raised from the ground, rotated, and aligned with the adjacent plowed land. The tillage work machine is lowered below the ground again at the end point of the previous tillage. The lifting and lowering operations of such tillage machines are all performed manually by the operator, which requires complex line of sight movements in order to align the machine with the adjacent plowed land and to lower the tillage machine in the right place. This required considerable skill.

Fig. 1 shows an embodiment of a rotary tiller as a tillage machine, and shows how the rotary tiller 101 performs tillage in the order of A, B, C, ..., F. It is a plan view showing
Due to the above-mentioned reasons, cultivated land A, B, C, ...,
The boundary between F and the uncultivated headland G forms irregular unevenness. Headlands with irregular boundaries like this make the work of cultivating them troublesome and lead to inefficiency. Therefore, as shown in Figure 2, the cultivated land A, B, C,...,F
If A, B, C, ..., F are tilled so that the boundaries between the land and the uncultivated headland G are aligned in a straight line, the subsequent tilling work of the headland G will be extremely efficient. Be able to do it.

The purpose of the present invention is to solve the above-mentioned problems with conventional devices, and to automatically align the end of plowing in the previous process with the start of plowing in the next process, making it easy to operate even for beginners. The purpose of the present invention is to easily realize a lifting/lowering switching device that allows the user to move up and down by simply adding some parts to an existing tillage machine.

A lifting/lowering switching device for a tillage work machine according to the present invention which achieves the above object is connected to a lifting device consisting of a lift control lever or the like configured to switch the tillage work machine between a lowered position and a raised position. In a tillage work machine that is connected to a discrimination device installed in the machine body that discriminates between uncultivated land and cultivated land, the control lever is activated by a detection signal from the discrimination device in opposition to the raised and lowered positions of the lift control lever. In addition to arranging an operating body such as a micro switch,
An actuator that operates in conjunction with the operation of the actuating body is arranged opposite to the base of the lifting control lever, and the tilling work machine holding position of the lifting device at the end of plowing and the start end of plowing of the tilling work machine is controlled. , from the raised position to the lowered position according to the discrimination signal of the discrimination device,
Alternatively, it is characterized in that it can be automatically switched in the opposite direction from the lowered position to the raised position.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 3 shows a plan view of a tractor equipped with a rotary tiller according to the present invention, where 1 is the tractor as a traveling body, and 2 is a rotary tiller attached to the rear of the tractor 1 so that it can be raised and lowered. , 3 is the driver's seat. A lift control lever 4 for the rotary tiller 2 is provided on the side of the driver's seat 3.
By operating the rotary tiller 2, the rotary tiller 2 can be lowered to the tilling position or raised to the non-tilling position. Also,
A discrimination device 5 for discriminating between uncultivated land and cultivated land is provided on both sides of the rear of the tractor 1, which is a traveling body. The discrimination device 5 may be attached to the rotary tilling section 2 side, or the rotary tilling section 2 may be replaced with another tilling machine. 30 is an adjacent tillage mark.

The discrimination device 5 discriminates between uncultivated land and cultivated land by contact or non-contact, and many known devices that have already been proposed can be adopted.
For example, as a method for non-contact discrimination, a method can be applied that emits a predetermined amount of infrared rays to the ground and detects the amount of reflected infrared rays to discriminate between uncultivated land and cultivated land.

4 and 5 respectively show a lift control lever and an operating electric circuit according to an embodiment of the present invention.

In this embodiment, as shown in FIGS. 4 and 5, an actuator 8D is provided facing the base of the elevation control lever 4 for shifting the elevation control lever 4 to the lowered position D of the rotary tiller 2, and a rotary tiller. A pair of actuators 8U for shifting the section 2 to the raised position U is provided. Further, there are an actuating body, ie, a micro switch 15D, which opens the contact when the lift control lever 4 is in the lowered position D, and a micro switch 15U, which opens the contact when the lift control lever 4 is in the raised position U, respectively. It is provided. In addition, a pair of contacts 5K and 5M are provided as contacts operated by the discrimination device 5 for discriminating between uncultivated land and cultivated land, and the contact 5K is connected to the micro switch 1.
The contact 5M is connected in series with the micro switch 15U, and is closed when determining cultivated land, and is open when determining uncultivated land.The contact 5M is connected in series with micro switch 15U, and is open when determining cultivated land. It is designed to close when it is determined whether the land is uncultivated. 14D is an actuator driver that operates the actuator 8D, and 14U is an actuator driver that operates the actuator 8U.
Further, 16 is a main switch of the device.

In the above-mentioned device, when one stroke of rotary tilling by the tractor ends, the contact point 5M is activated so that the discriminating device 5 determines the uncultivated land at the end point of the previous stroke.
is closed, and contact 5K is opened. At this point, the microswitch 15D is open, while the microswitch 15U is closed, so the actuator driver 14U is actuated, which causes the actuator 8U to move to the lowered position of D. The lift control lever 4 is shifted to the raised position of U, and the rotary tiller 2 is automatically raised.

When the machine is turned with the rotary tillage section 2 raised and the machine direction is steered next to the cultivated land that has just been tilled, the discrimination device 5 discriminates the cultivated land, so the contact 5K described above is closed and the contact 5M becomes open. On the other hand, since the micro switch 15D is closed and the micro switch 15U is open, the actuator driver 14D operates and the actuator 8D
move. Due to the operation of the actuator 8D, the elevation control lever 4, which is in the raised position U, is shifted to the raised position D, and the rotary tiller 2 is automatically lowered.

As described above, the determination device 5 determines the holding position of the rotary tiller 2 of the lift control lever 4 at the end of tilling and the start end of tilling of the rotary tiller 2.
This is because it is possible to automatically switch from the raised position to the lowered position if it is in the raised position, or from the lowered position to the raised position if it is in the lowered position, depending on the discrimination signal between uncultivated land and cultivated land. , the operator simply turns the machine to align it with the tilled land of the previous process, and the rotary tiller 2 automatically descends when it matches the tilling end point of the previous process, and the rotary tiller unit 2 automatically descends when it matches the tilling end point of the previous process. The tilling end position will automatically rise at the same point as the tilling end point of the previous process.

Furthermore, it goes without saying that once the main switch 16 is turned off, the rotary tiller 2 can be raised or lowered by manually moving the raising/lowering control lever 4 in the same manner as in the conventional device.

FIG. 6 is a side view of the lift control lever 4 of the rotary tiller 2 according to another embodiment of the present invention. The lift control lever 4 moves a hydraulic spool in conjunction with a link mechanism, or operates a hydraulic cylinder using an electro-hydraulic system to move the rotary tiller 2 up and down. When the lift control lever 4 is shifted from the neutral position shown by the solid line to the position D shown by the chain line, the rotary tiller 2 is lowered, and when it is shifted to the position U shown by the chain line in the opposite direction, the rotary tiller 2 is lowered. 2 is on the rise. Reference numeral 6 denotes a set switch provided at the top of the lift control lever 4, which is an automatic return type button switch, and is configured so that when pressed, the contact closes and when released, the set switch opens. Reference numeral 7 denotes a reset switch, which is composed of a micro switch or the like, and contacts the lift control lever 4 when it is in position D on the lowering side and its contact closes, and when the lift control lever 4 is in a position other than position D. is opened so that its contacts are open. 8 is an actuator, which is operated by a solenoid or the like;
When its tip presses the lower end of the lift control lever 4, the lift control lever 4, which is in the raised position U, is rotated about the fulcrum 4a, and the rolling tillage section 2 is operated to be shifted to the lowered position D. This actuator 8 is not connected to the elevation control lever 4 except when moving the elevation control lever 4.

FIG. 7 is an electric circuit diagram for automatically operating the elevation switching device of the tillage work machine of the present invention.
6 is the aforementioned set switch, 7 is a reset switch, 8 is an actuator, and 5a is a contact operated by the discrimination device 5. The contact 5a is opened when the discrimination device 5 discriminates uncultivated land, and is closed when the discriminator 5 discriminates cultivated land. Further, 9 and 10 are pull-up resistors, 11 and 12 are diodes and capacitors respectively forming an initial reset circuit, 13 is a flip-flop, and 14 is an actuator driver.

In each of the above-described configurations, at the end of one stroke of rotary tillage by the tractor, the operator shifts the lift control lever 4 to the raised position U to raise the rotary tiller 2. At this time, press the set switch 6 once. By pressing this set switch 6, the flip-flop 13
The output of is set to "1". Next, the operator turns the machine with the rotary tilling section 2 in the raised state and steers the machine next to the cultivated land 30 that has just been tilled. As shown in FIG. 3, when the machine advances to a place where the discriminating device 5 is located above the cultivated land 30, the discriminating device 5 discriminates the cultivated land and closes the contact 5a. When the contact point 5a is closed, the actuator driver 14 is activated to move the actuator 8. Due to the operation of the actuator 8, the lift control lever 4, which has been in the raised position U, is shifted to the lowered position D, so that the rotary tiller 2 is automatically lowered to the tilling work position by this shift. When the lift control lever 4 is shifted to the lower position D, the reset switch 7 is pressed and the contact is opened, so that the output of the flip-flop 13 is reset to "0".

As described above, in this embodiment, the rotary tiller 2 is connected to a lifting device configured to be switchable between a lowered position D and a raised position U, and the lifting control lever 4 of this lifting device is used to switch between uncultivated land and cultivated land. The rotary tilling section lift position U of the lifting device at the tilling start end is connected to a discriminating device 5 that discriminates
in conjunction with the cultivated land discrimination signal of the discrimination device 5,
Since the rotary tiller 2 is configured to be automatically switched to the lower position D, at the end of one stroke of tilling, the rotary tiller 2 is first shifted to the upper position by pressing the set switch 6 along with the shift operation of the lift control lever 4. By simply aligning the direction of the machine with the plowed land in the previous process, the rotary tiller 2 will automatically descend at the same point as the tilling end point in the previous process.

Although not shown in the examples, the lowering position D of the rotary tilling part of the lifting device at the end of tilling
so that it can be automatically switched to the raised position U in conjunction with the uncultivated land discrimination signal of the discrimination device 5.
The reset switch 7 and actuator 8 positions shown in FIG. 6 may be arranged on the raised position U side of the lifting control lever 4 as shown by chain lines 7' and 8'. By pressing the set switch 6 before the process ends, the output of the flip-flop 13 becomes "1".
The lifting control lever 4 of the lifting device is switched to the raised position U in conjunction with the discrimination signal of the discrimination device 5 which discriminates the uncultivated land at the end of tilling.
Since the rotary tiller 2 automatically rises at the position that coincides with the tilling end point of the previous stroke, the operator can move the rotary tiller 2 to the lowered position
By simply pressing the set switch 6 of the lift control lever 4 located at the rotary tiller 2, the rotary tiller 2 will automatically rise to a position that coincides with the tilling end point of the previous stroke.

As described above, the elevating/lowering switching device for a tillage work machine of the present invention connects the plowing work machine to an elevating device consisting of an elevating/lowering control lever configured to be able to switch between a lowered position and a raised position. In a tillage working machine connected to a discriminating device provided on the machine body for discriminating between uncultivated land and cultivated land, the plowing work machine is activated by a detection signal from the discriminating device in opposition to the ascending and descending positions of the lift control lever. An actuating body such as a micro switch is arranged, and an actuator that operates in conjunction with the operation of the actuating body is arranged opposite to the base of the lift control lever, and the tilling end and tilling start end of the tilling work machine are arranged. The plowing work machine holding position of the lifting device can be automatically switched from the raised position to the lowered position, or from the lowered position to the raised position, in the opposite direction, according to the discrimination signal of the discrimination device, so that the discrimination linked to the lifting device is possible. A lifting switching device that automatically switches the tilling work equipment holding device of the lifting device up and down based on a discrimination signal from the device is used to operate the lifting control lever of the work equipment installed on a conventional tractor from raising to lowering. By using the operation to the up and down positions of the range as is, you can simply add a part of the actuator or actuator such as a control switch to automatically raise and lower the work equipment when the machine turns. This can be realized easily and inexpensively by simply adding the following parts.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic plan views showing the tilling situation with the tractor, Figure 3 is a plan view of the tractor equipped with the device of the present invention, Figure 4 is a schematic side view of the elevation control lever, and Figure 5. is an electrical circuit diagram for operating the device of the present invention. Figures 6 and 7
The figures show another embodiment of the present invention, in which FIG. 6 is a schematic side view of the elevation control lever, and FIG. 7 is an electrical circuit diagram. DESCRIPTION OF SYMBOLS 1... Tractor (traveling machine body), 2... Rotary tilling section (plowing work machine), 4... Lifting control lever (lifting device), 5... Discrimination device, 5a,
5K, 5M...Contact, 6...Set switch, 7
... Reset switch, 8, 8D, 8U ... Actuator, 13 ... Flip-flop, 14,
14D, 14U...actuator driver.

Claims (1)

[Scope of utility model registration request] The tillage work machine is connected to a lifting device consisting of a lifting control lever, etc. configured to be switchable between a lowered position and a raised position, and the lifting device is connected to a discriminating device installed on the machine body that distinguishes between uncultivated land and cultivated land. In the tillage work machine, an actuating body such as a micro switch that is activated by a detection signal from the discriminating device is disposed opposite to the raised position and the lowered position of the lift control lever, and the actuating body is An actuator that operates in conjunction with the above is arranged opposite to the base of the lifting control lever, and the tilling work machine holding position of the lifting device at the end of plowing and the start of plowing of the tilling work machine is determined by a discrimination signal of a discriminating device. 1. A lifting/lowering switching device for a tillage work machine, characterized in that it is configured to be able to automatically switch from a raised position to a lowered position, or from a lowered position to a raised position in the opposite direction.