JP2003259707A - Operation structure for working implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation structure for a working implement for improving the operability for lifting the implement by ensuring the automatic lift operation of the implement to be stopped by rational operation. <P>SOLUTION: The operation structure works as follows. On operating a neutral reverse-type operating tool 31 to a manual ascending operation position U1, the working implement 4 ascends while the operation is maintained. On operating the tool 31 to an automatic ascending operation position U2, the working implement 4 automatically ascends to a specified upper limit position. On operating the tool 31 to a manual descending operation position D1, the working implement 4 descends while the operation is maintained. On operating the tool 31 to an automatic descending operation position D2, the working implement 4 automatically descends to a specified working height position. On operating the tool 31 to the position D1 midway of automatic ascending motion of the working implement 4, its ascending motion stops at an ascending position at that time. On operating the tool 31 to the position U1 midway of automatic descending motion of the working implement 4, its descending motion stops at a descending position at that time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where a working device is connected to a rear portion of a traveling machine body so as to be capable of being driven up and down, and when a neutral return type operating tool is operated from the neutral position to an automatic raising operation position, the working device is brought into a predetermined position. Automatically rising to the upper limit position of, when the operation tool is operated from the neutral position to the automatic lowering operation position,
The present invention relates to an operating structure of a working machine configured such that the working device automatically descends to a predetermined working height position.

[0002]

2. Description of the Related Art Conventionally, as an operation structure of a work machine as described above, as disclosed in, for example, Japanese Patent Laid-Open No. 2001-275415, a manual raising operation position is provided between a neutral position and an automatic raising operation position. In addition, a manual lowering operation position is provided between the neutral position and the automatic lowering operation position, and the manual raising operation for raising the working device only while operating the operating tool to the manual raising operation position, One configured to perform a manual lowering operation of lowering the work device only while operating to the manual lowering operation position, for example, Japanese Patent Laid-Open No. 9-294426.
As disclosed in Japanese Patent Laid-Open Publication No. JP-A-2003-264, there is one equipped with a notification device that generates a notification sound when the operating tool reaches either the automatic raising operation position or the automatic lowering operation position.
In the above-mentioned conventional technique, the work device is configured to be switched to the operating state when the operation tool is operated from the neutral position to the automatic lowering operation position and then the second operation is performed to the operation position. ing.

[0003]

According to the former one of the above-mentioned prior arts, in addition to the automatic lifting operation for automatically lifting the working device to a predetermined upper limit position or a predetermined working height position by operating the operation tool. Although it has the advantage of being able to manually raise and lower the working device to an arbitrary height position, the operating device is operated from the neutral position to the manual raising operation position or the manual lowering operation position to raise the working device to an arbitrary height position. If you intend to perform a manual raising / lowering operation to raise or lower to a position, but accidentally operate the operating tool to an automatic raising operation position or an automatic lowering operation position, the working device automatically moves to a predetermined upper limit position or a predetermined work height position. Since it is possible to raise and lower, this makes it impossible to manually raise and lower the working device until the automatic raising and lowering operation is completed. There is room for stomach improvement.

On the other hand, according to the latter of the above-mentioned prior arts, the driver can know whether the operating tool has been reliably operated to the automatic raising operation position or the automatic lowering operation position, but the operating tool A notification sound generated from the notification device upon reaching the automatic lowering operation position of the first operation of the operating tool to the automatic lowering operation position for automatically lowering the working device to a predetermined work height position, 2 to the automatic lowering operation position of the operating tool for switching the working device to the operating state
Since it is the same regardless of the operation of the first time, it is impossible to know from the operation sound whether it is the first operation or the second operation to the automatic lowering operation position of the operation tool.
As a result, the work device switches to the operating state and the work is started even if the work device is merely lowered to the predetermined work height position, or the work device is switched to the operating state and the work is started. However, there is a risk that the work device will only start to descend to a predetermined work height position and the work will not start, and in order to eliminate this inconvenience, the operating tool reaches the automatic lowering operation position. Despite the configuration that the notification sound is generated from the notification device, a troublesome operation such as looking back and visually recognizing the state of the work device at the back whenever the operation tool is operated to the automatic lowering operation position is performed. Had to do.

A first object of the present invention is to enable the lifting and lowering operability to be improved by stopping the automatic lifting and lowering operation of the working device by a rational operation, and the second object is to operate Whether the operation of the tool to the automatic lowering operation position is an operation for automatically lowering the working device to a predetermined working height position,
Another object is to make it possible to easily understand whether the operation is an operation for switching the working device to the operating state, thereby avoiding the inconvenience that the work is unexpectedly started or the work is not started.

[0006]

[Structure] In order to achieve the above-mentioned first object, in the invention according to claim 1 of the present invention, a working device is connected to a rear part of the traveling machine body so as to be capable of being driven up and down. In the operating structure of the working machine, when the neutral return type operating tool is operated from the neutral position to the manual raising operation position, the working device is raised while the operating tool is maintained at the operating position, and the operating tool is operated. When the operating device is operated from the neutral position to the automatic raising operation position beyond the manual raising operation position, the working device is automatically raised to a predetermined upper limit position, and when the operating tool is operated from the neutral position to the manual lowering operation position, the The working device descends while the operating tool is maintained in the operating position, and when the operating tool is operated from the neutral position to the automatic descending operating position beyond the manual descending operating position, the operating device is moved to a predetermined position. When the operating tool is automatically lowered to the work height position and the operating tool is operated from the neutral position to the manual lowering operation position while the operating device is being automatically raised based on the operation of the operating tool to the automatic raising operation position, The device stops rising at the midway ascending position at that time, and moves the operating tool from the neutral position to the manual lifting operating position during the automatic lowering of the working device based on the operation of the operating tool to the automatic lowering operating position. When operated, the working device is configured to stop descending at the midway descending position at that time.

[Operation] According to the first aspect of the invention, when the automatic raising operation for automatically raising the working device to the predetermined upper limit position is unexpectedly started by an erroneous operation of the operating tool to the automatic raising operation position, By operating the operating tool to the manual lowering operation position, the automatic raising operation of the working device due to the erroneous operation can be immediately stopped, and conversely, the operating device is operated by the erroneous operation of the operating tool to the automatic lowering operating position. When the automatic lowering operation for automatically lowering to the predetermined working height position is unexpectedly started, the operating tool is operated to the manual raising operation position to immediately stop the automatic raising operation of the working device due to the erroneous operation. Will be able to.

In other words, the operator intends to perform a manual raising / lowering operation for raising and lowering the working device to an arbitrary height position by operating the operating tool from the neutral position to the manual raising operating position or the manual lowering operating position, but by mistake, those operating positions are operated. Even if the operating tool is operated up to the automatic raising operation position or the automatic lowering operation position, the automatic raising / lowering operation of the working device due to the erroneous operation is immediately stopped, and the manual raising operation position of the operating tool is stopped. Alternatively, it is possible to switch to the manual raising / lowering operation of the working device based on the operation to the manual lowering operation position.

Moreover, the operation position for stopping the automatic raising / lowering operation of the work device due to the erroneous operation of the operation tool is the operation position for moving the work device in the direction opposite to the moving direction of the work device due to the erroneous operation, Further, since the operation position is close to the neutral position, the automatic lifting / lowering operation of the working device can be instinctively and quickly performed without any confusion.

[Effect] Therefore, the automatic raising / lowering operation of the work device due to an erroneous operation of the operating tool can be easily and immediately stopped by a rational operation, and the appropriate raising / lowering operation of the work device can be quickly performed thereafter. In addition to being excellent in workability, it has become possible to avoid a reduction in work efficiency due to erroneous operation.

[Structure] In the invention according to claim 2 of the present invention, in the invention according to claim 1, the operation tool is operated from the neutral position to the automatic lowering operation position, and then the operation is performed. When the second operation to the position is performed, the working device is switched to the operating state.

[Operation] According to the invention described in claim 2, the next operation after the operating tool is operated from the neutral position to the automatic lowering operation position to automatically lower the working device to a predetermined working height position As a result, the working device can be switched to the working state by operating the operating tool again to the automatic lowering operation position.

Further, after the operating tool is operated to the automatic lowering operation position and the working device is automatically lowered to the predetermined working height position, the automatic operation lowering operation position of the operating tool which is not usually performed as the next operation. Is effectively used for switching the work state of the work device, it is not necessary to newly provide a dedicated operation position for switching the work device to the work state.

[Effects] Therefore, not only the operation of raising and lowering the working device, but also the operation of switching the working device to the working state can be easily performed with a single operation tool and excellent operability can be achieved. , The operation structure can be simplified and the manufacturing cost can be reduced.

[Structure] In the invention described in claim 3 of the present invention, in the invention described in claim 1 or 2,
An alarm device is provided for generating an alarm sound when the operating tool reaches either the automatic raising operation position or the automatic lowering operation position.

[Operation] According to the invention described in claim 3, when an alarm sound is generated from the alarm device, the operating tool is operated to the automatic raising operation position or the automatic lowering operation position, and the working device according to the operation. If it is possible to let the driver know that the operation is being performed, and no notification sound is generated from the notification device, the operating tool has not been operated to the automatic raising operation position or the automatic lowering operation position, and those operating positions It becomes possible for the driver to know that the operation of the work device is not performed according to the operation to.

For example, when the working device is automatically moved up and down to a predetermined upper limit position or a predetermined work height position by operating the operation tool, if a notification sound is generated from the notification device, the operation at that time is the operation tool. Is properly operated beyond the manual raising operation position or the manual lowering operation position to the automatic raising operation position or the automatic lowering operation position, and the automatic lifting operation of the working device according to the operation is performed. It is possible to let the driver know, and conversely, if there is no alarm sound from the alarm device, the operation at that time is not properly operated to the automatic raising operation position or the automatic lowering operation position. Therefore, the driver can be made aware that the automatic lifting operation of the work device is not performed.

Further, when the working device is switched to the operating state by operating the operation tool, if the notification sound is generated from the notification device, the operation at that time is an automatic descending operation when the operation tool exceeds the manual lowering operation position. It is possible to let the driver know that it is a proper one that has been reliably operated to the position, and that the switching operation to the operating state of the work device based on that operation is performed, and conversely, a notification sound is generated from the notification device. If this is not done, the driver knows that the operation at that time is an improper operation in which the operation tool is not reliably operated to the automatic lowering operation position, and the operation device is not switched to the operating state. Will be able to.

Further, when the working device is moved up and down to an arbitrary height position by operating the operating tool, if an alarming sound is generated from the alarming device, the operation at that time is a manual raising operating position or a manual operation. To let the driver know that it is improperly operated beyond the lowering operation position to the automatic raising operation position or the automatic lowering operation position, and that the automatic lifting operation of the work device is performed according to the incorrect operation. And on the contrary,
If the notification sound is not generated from the notification device, the operation at that time is not an erroneous operation in which the operation tool is operated to the automatic raising operation position or the automatic lowering operation position beyond the manual raising operation position or the manual lowering operation position, and It becomes possible for the driver to know that the automatic raising / lowering operation of the work device in response to an erroneous operation is not performed.

In short, by providing the manual raising operation position or the manual lowering operation position between the neutral position and the automatic raising operation position or the automatic lowering operation position, the operation tool can be moved to the automatic raising operation position or the automatic lowering operation position. Considering that the operation may become uncertain, or that the operation tool may be operated to the manual raising operation position or the manual lowering operation position but may be mistakenly operated to the automatic raising operation position or the automatic lowering operation position. In this way, the driver can easily understand whether the operation of the operation tool at that time is proper, so that if the operation of the operation tool at that time is incorrect, an erroneous operation is performed. Based on the above, it is possible to prompt the driver to stop the automatic raising / lowering operation of the work device and to appropriately re-operate the operating tool, and the driver can promptly perform the stopping operation or the re-operation.

[Effect] Therefore, the automatic lifting operation of the working device due to an erroneous operation of the operating tool can be more surely and early stopped, and the appropriate lifting operation of the working device thereafter can be performed more quickly. It is possible to more effectively avoid a decrease in work efficiency due to an erroneous operation of the automatic raising operation position or automatic lowering operation position of the robot. Proper,
It has become possible to easily avoid a decrease in work efficiency due to the fact that the work device is not operated based on the operation to those operation positions.

[Structure] In the invention according to claim 4 of the present invention, in the invention according to claim 1 or 2,
Upon reaching any one of the manual raising operation position, the automatic raising operation position, the manual lowering operation position, and the automatic lowering operation position of the operating tool, a notification sound corresponding to each of those operating positions is generated. Equipped with a notification device.

[Operation] According to the invention described in claim 4, the alarm sound generated from the alarm device drives the operation position of the operation tool at that time, and the operation of the work device performed based on the operation. People will be able to understand.

For example, when the working device is automatically moved up and down to a predetermined upper limit position or a predetermined working height position by operating the operating tool, the operating tool reaches the automatic raising operation position or the automatic lowering operation position. If the generated notification sound is generated from the notification device, the operation at that time is an appropriate operation that the operation tool is reliably operated to the automatic raising operation position or the automatic lowering operation position beyond the manual raising operation position or the manual lowering operation position. It is possible to let the driver know that the automatic lifting operation of the work device is performed according to the operation, and conversely, when the operating tool reaches the automatic raising operation position or the automatic lowering operation position. If the generated alarm sound is not generated from the alarm device, the operation at that time is an improper operation in which the operating tool is not reliably operated to the automatic raising operation position or the automatic lowering operation position, and That lifting operation is not performed so that it is possible to recognize the driver.

Further, when the working device is switched to the operating state by operating the operation tool, if the notification sound is generated from the notification device when the operation tool reaches the automatic lowering operation position,
If the operation at that time is an appropriate operation in which the operation tool has been reliably operated beyond the manual lowering operation position to the automatic lowering operation position, the switching operation to the operating state of the working device based on the operation is performed. And let the driver know
On the contrary, if the notification device does not generate the notification sound generated when the operating tool reaches the automatic lowering operation position, the operation at that time is not sure that the operating tool is not operated to the automatic lowering operation position. This is appropriate, and the driver can be made aware that the operation of switching the working device to the operating state is not performed.

Further, when the work implement is moved up and down to an arbitrary height position by operating the operation tool, only the notification sound generated when the operation tool reaches the manually raised operation position or the manually lowered operation position is notified. If it occurs from the device, the operation at that time is an appropriate one in which the operating tool has been reliably operated to the manual raising operation position or the manual lowering operation position, and the manual lifting operation of the working device according to the operation is performed. It is possible to let the driver know that, and if a notification sound is generated from the notification device when the operating tool reaches the automatic raising operation position or the automatic lowering operation position, the operation at that time is operated. The tool is improperly operated beyond the manual raising operation position or the manual lowering operation position to the automatic raising operation position or the automatic lowering operation position, and the automatic lifting operation of the working device is performed according to the incorrect operation. If the alarm device does not generate the alarm sound, the operation at that time is not reliably operated to the manual raising operation position or the manual lowering operation position. It is improper, and it becomes possible to let the driver know that the manual lifting operation of the work device is not performed.

In short, since the manual raising operation position or the manual lowering operation position is provided between the neutral position and the automatic raising operation position and the automatic lowering operation position, the operation of the operating tool to each operating position becomes uncertain. In consideration of the possibility that the intention is to operate the operation tool to the manual raising operation position or the manual lowering operation position, the operation tool may be operated to the automatic raising operation position or the automatic lowering operation position by mistake. This allows the driver to easily recognize whether the operation of the operating device is appropriate or not, and if the operation of the operating tool at that time is incorrect, the automatic operation of the working device based on the incorrect operation is performed. The driver can be urged to stop the lifting operation and to appropriately re-operate the operating tool, and the driver can quickly perform the stopping operation and the re-operation.

[Effect] Therefore, the automatic raising / lowering operation of the working device due to an erroneous operation of the operating tool can be more surely and early stopped, and an appropriate raising / lowering operation of the working device thereafter can be performed more quickly. It is possible to more effectively avoid a decrease in work efficiency due to an erroneous operation of the automatic raising operation position or the automatic lowering operation position of the It has become possible to easily avoid a decrease in work efficiency due to the fact that the work device is not operated based on the operation to the position.

[Structure] In order to achieve the second object,
In the invention according to claim 5 of the present invention, in a work machine operation structure in which a work device is connected to a rear portion of a traveling machine body so as to be capable of being driven up and down, a neutral return type operation tool is automatically raised from the neutral position. When operated, the working device is automatically raised to a predetermined upper limit position, and when the operating tool is operated from the neutral position to the automatic lowering operation position, the working device is automatically lowered to a predetermined working height position, and the operation is performed. When the tool is operated from the neutral position to the automatic lowering operation position and then a second operation is performed to the operation position, the working device is configured to switch to an operating state, and the automatic operation of the operation tool is performed. Upon reaching the lowering operation position, an alarm sound is generated according to the operation of automatically lowering the working device to a predetermined working height position and switching of the working device to the operating state. That it was equipped with an alarm device.

[Operation] According to the invention described in claim 5, when the operation tool is operated toward the automatic lowering operation position,
If a notification sound is generated from the notification device, the operation at that time is
It is possible to let the driver know that the operating tool is properly operated to the automatic lowering operation position, and the alarm sound at that time causes the working apparatus to automatically lower the working device based on the operation. It is possible to let the driver know whether the operation to switch to the working state is performed, or
If no alarm sound is generated from the alarm device, the operation at that time is not proper because the operation tool is not reliably operated to the automatic lowering operation position, and the working device is automatically lowered to the working state. This allows the driver to know that no operation is performed.

That is, the driver can easily know whether or not the operation of the operating tool to the automatic lowering operation position is proper, and if the operation is not appropriate, the proper re-operation of the operating tool is performed. Thus, the driver can promptly perform an appropriate re-operation to the automatic lowering operation position of the operation tool. Further, since the driver can easily understand the operation of the work device performed based on the operation of the operation tool to the automatic lowering operation position at that time, the work device is automatically lowered to a predetermined work height position. The work device will switch to the operating state and the work will start unexpectedly, or the work device will switch to the operating state and start the work, but the work device will automatically reach the predetermined work height position. It is possible to avoid the occurrence of inconveniences such as work is not started only by descending, and even if such inconveniences are caused, the driver can easily understand the occurrence of these inconveniences. Therefore, the driver can quickly perform an appropriate operation for those inconveniences.

[Effect] Therefore, the work efficiency resulting from the improper operation of the operating tool to the automatic lowering operation position, and the automatic lowering operation of the working apparatus or the switching operation to the operating state based on the operation are not performed. It has become possible to easily avoid a decrease in work efficiency due to a decrease in work efficiency or an inconvenience that work is started or not started.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire side surface of a riding type rice transplanter which is an example of a working machine. This riding type rice transplanter is equipped with a hydraulic cylinder 2 at a rear portion of a riding type traveling machine body 1. A seedling planting device 4, which is an example of a working device 4, is connected via a link mechanism 3 that swings up and down by the operation of the above so as to be capable of driving up and down, and
By mounting the fertilizer application device 5, it is configured as a mid-mount fertilizer specification.

The traveling body 1 receives the power from the engine 6
It is configured in a four-wheel drive system in which it is transmitted as traveling power to the left and right front wheels 10 and rear wheels 11 via a hydrostatic continuously variable transmission 7, a gear transmission 8, a transmission shaft 9, and the like, and a central portion thereof. A boarding operation unit 14 including a steering wheel 12 for steering the left and right front wheels 10 and a driver's seat 13 is formed in the vehicle.

In the seedling planting device 4, while the ground leveling float 15 preliminarily lands the seedling planting part as the machine runs, the work power from the gear type gearbox 8 is transmitted to the feed case 16 and the feed is carried out. The seedling table 17 is reciprocally driven in the left-right direction with a constant stroke by the distributed power from the case 16, and a plurality of rotary type planting mechanisms 18 are provided.
However, it is configured to perform a planting operation in which a predetermined amount of seedling is taken out from the lower end of the seedling mounting table 17 and planted in a field.

In the fertilizer applicator 5, the grooving device 19 provided in the leveling float 15 forms a fertilizer applicator as the machine runs, while the work power from the gear type transmission 8 is used to feed a plurality of feeding mechanisms 20. Feeds the fertilizer in the fertilizer hopper 21 by a predetermined amount, and pumps the fertilizer fed by each feeding mechanism 20 by the operation of the electric fan 22 toward the corresponding grooving device 19 via the guide hose 23. It is configured to bury the fertilizer laterally on the seedlings planted in the field.

As shown in FIGS. 1 and 2, the seedling planting device 4
In each of the ground leveling floats 15, the float fulcrum shaft 24 is attached to a corresponding one of the plurality of support arms 25 extending rearward and downward from the float fulcrum shaft 24 facing left and right.
It is supported so that it can swing up and down.

In the traveling machine body 1, a pair of left and right line drawing markers 26 are in a lying posture in which the tips of the markers 26 project into the field to form the next traveling reference line, and the tips are separated from the field, and the traveling machine body 1 is moved. It is equipped with a posture that can be switched to a standing posture that is close to.

The left and right line drawing markers 26 are used for the seedling planting device 4
When the operating wires 27 linked to each of them are pulled up in association with the rising of the predetermined upper limit position, they are switched to the standing posture against the bias of the spring 28. By the action of the left and right holding mechanisms 29 linked to the operating wire 27, the holding mechanism 29 holds the seedling planting device 4 in the standing posture regardless of the descending operation.
Further, the operation of the electromagnetic cylinders 30 corresponding to the respective holding mechanisms 29 selectively releases the holding of the holding mechanisms 29 in the standing posture, whereby the posture switching to the lying posture is allowed, and the seedlings are planted in the released state. A lowering operation is performed to lower the planting device 4 to a planting position which is a predetermined working height position, or the released state is selectively revealed when the planting device 4 is lowered to the planting position. Thus, the wire drawing marker 26 on the deselected side can be switched to the laid posture by the urging of the spring 28.

The raising and lowering of the seedling planting device 4 is performed by a neutral return type operation tool 31 provided at the lower right of the steering wheel 12.
Based on the operation of the cross swing type operation lever 31 which is an example, a control device 32 including a microprocessor mounted on the traveling machine body 1 switches an electromagnetic switching valve 33 for switching the flow state of the hydraulic oil to the hydraulic cylinder 2. It can be done by controlling the operation of.

As shown in FIG. 2, the operating lever 31 has a manual raising operation position U1 above the neutral position N, an automatic raising operation position U2 above the manual raising operation position U1, and a manual lowering operation below the neutral position N. The position D1, the automatic lowering operation position D2 below the manual lowering operation position D1, the left marker operating position F ahead of the neutral position N, and the right marker operating position R rearward of the neutral position N can be operated. The arrival of each of the operation positions U1, U2, D1, D2, F and R is detected by the multi-contact switch 34, and the multi-contact switch 34 outputs the detection information to the control device 32.

Further, the control device 32 includes a multi-contact switch 3
In addition to the detection information from 4, the float sensor 35 including a rotary potentiometer that detects the vertical swing angle of the leveled float (hereinafter abbreviated as sensor float) 15 located in the center of the left and right, and the predetermined value of the seedling planting device 4 Detection information from an upper limit switch 36 or the like that detects the arrival of the holding mechanism 29 at the upper limit position, the control device 32 releases each holding mechanism 29 based on the detection information in addition to the operation of the electromagnetic switching valve 33. The electromagnetic cylinder 30, the clutch motor 38 that switches and operates the work clutch 37 that intermittently transmits power to the seedling planting device 4, and the fertilizer application device 5, and the operation of the buzzer 39, which is an example of the notification device 39, are also controlled. Is configured.

The control operation of the control device 32 will be described with reference to FIGS. 2 and 3. When the multi-contact switch 34 detects that the operating lever 31 has reached the manual raising operation position U1, the control operation of the control device 32 will be described. While the detection is continued, the electromagnetic switching valve 33 is switched to the supply state in which the hydraulic oil is supplied to the hydraulic cylinder 2 and the hydraulic cylinder 2 is shortened to raise the seedling planting device 4, and the detection is interrupted. Then, the electromagnetic switching valve 33 is switched to a stop state in which the flow of the hydraulic oil to the hydraulic cylinder 2 is stopped to stop the shortening operation of the hydraulic cylinder 2 so that the seedling planting device 4 is stopped in the raised position at that time. It has become.

Further, the automatic raising operation position U of the operation lever 31
When the arrival at 2 is detected by the multi-contact switch 34, the buzzer 39 is operated to generate the alarm sound only once, and the upper limit switch 36 detects that the seedling planting device 4 reaches the predetermined upper limit position. Solenoid valve 3 until
3 is switched to the supply state and the hydraulic cylinder 2 is shortened to automatically raise the seedling planting device 4 toward a predetermined upper limit position, and the upper limit switch 36 moves the seedling planting device 4 to the predetermined upper limit position. When the arrival is detected, the electromagnetic switching valve 33 is switched to the stopped state to stop the shortening operation of the hydraulic cylinder 2, so that the seedling planting device 4 is automatically stopped at a predetermined upper limit position. ing.

On the contrary, when the multi-contact switch 34 detects that the operating lever 31 has reached the manual lowering operation position D1, the electromagnetic switching valve 33 is moved from the hydraulic cylinder 2 to the operating oil while the detection is continued. When the seedling planting device 4 is lowered by switching to a discharge state in which the seedling planting device 4 is discharged and the hydraulic cylinder 2 is extended, the electromagnetic switching valve 33 is stopped.
Is switched to a stopped state to stop the extension operation of the hydraulic cylinder 2 so that the seedling planting device 4 is stopped at the lowered position at that time.

Further, the automatic lowering operation position D of the operation lever 31
When the arrival at 2 is detected by the multi-contact switch 34, the buzzer 39 is operated to generate an alarm sound only once, and the float sensor 35 causes the sensor float 15 to come into contact with a predetermined reference posture set in advance. The seedling planting device 4 is set to a predetermined position by switching the electromagnetic switching valve 33 to the discharge state and extending the hydraulic cylinder 2 until it is detected that the returning seedling planting device 4 has reached the predetermined planting work height position. Automatically descends toward the planting work height position, and the float sensor 35 detects that the seedling planting device 4 has reached the predetermined planting work height position.
By switching the electromagnetic switching valve 33 to the stopped state, the hydraulic cylinder 2
By stopping the extension operation of (3), the seedling planting device 4 is automatically stopped at a predetermined planting work height position. After the seedling planting device 4 is automatically stopped at a predetermined planting work height position, when the sensor float 15 swings up and down along with the traveling of the machine body and deviates from the predetermined reference posture, By controlling the operation of the electromagnetic switching valve 33 based on the detection information from the float sensor 35, automatic raising / lowering control for automatically raising / lowering the seedling planting device 4 so that the sensor float 15 returns to a predetermined reference posture is performed. As a result, the seedling planting device 4 can be maintained at a predetermined planting work height position regardless of changes in the ups and downs of the mud surface in the field.

Then, as the next detection after the arrival of the operating lever 31 to the automatic lowering operation position D2 is detected by the multi-contact switch 34, the second arrival of the operating lever 31 to the automatic lowering operation position D2 is the multi-contact. When it is detected by the switch 34, the buzzer 39 is activated to generate the alarm sound twice in succession, and the clutch motor 38 is activated to switch the work clutch 37 from the transmission disengaged state to the transmission on state, thereby planting seedlings. The planting of the seedlings by the attachment device 4 and the fertilization by the fertilizer application device 5 are started to reveal the working state. Even in this working state, the control device 32 is configured to perform automatic lifting control.
As a result, the seedling planting device 4 can be maintained at a predetermined planting work height position regardless of changes in the undulations of the mud surface of the field, and stable seedling planting can be performed at a preset planting depth. It has become.

Incidentally, when the seedling planting device 4 is automatically stopped at a predetermined planting work height position, the multi-contact switch 34 is reached when the operating lever 31 reaches the manual raising operation position U1 or the automatic raising operation position U2. When detected by, after the automatic lifting control is terminated, the raising operation state of the seedling planting device 4 based on the detection information at that time is displayed,
Further, in the working state, when the multi-contact switch 34 detects that the operating lever 31 has reached the manual raising operation position U1 or the automatic raising operation position U2, the clutch motor 38
Is operated to switch the work clutch 37 from the power transmission on state to the power transmission disengaged state, and after finishing the automatic lifting control, the raising operation state of the seedling planting device 4 based on the detection information at that time is displayed. Has become.

By the way, the next detection after the arrival of the operating lever 31 at the automatic raising operation position U2 by the multi-contact switch 34 is detected by the upper limit switch 36 reaching the predetermined upper limit position of the seedling planting device 4. If it is detected that the operating lever 31 has reached the manual lowering operation position D1 by the multi-contact switch 34, the electromagnetic switching valve 33 is switched to the stopped state and the shortening operation of the hydraulic cylinder 2 is stopped to stop the seedling planting device 4. Is to be stopped at the position where it is being raised.

When the multi-contact switch 34 detects that the operating lever 31 has reached the automatic lowering operation position D2, the next detection is made by the float sensor 35 to the predetermined planting work height position of the seedling planting device 4. When it is not the arrival detection but the arrival detection of the operation lever 31 to the manual raising operation position U1 by the multi-contact switch 34, the electromagnetic switching valve 33 is switched to the stopped state to stop the extension operation of the hydraulic cylinder 2 and thus the seedling planting. The attachment device 4 is adapted to be stopped at the midway descending position at that time.

On the other hand, although not shown, the operating lever 31
When the multi-contact switch 34 detects that the left marker operation position F has been reached, the electromagnetic cylinder 30 is operated with respect to the holding mechanism 29 that holds the left wire drawing marker 26 in the upright posture, and the left wire drawing marker 26 falls down. When the planting device 4 is allowed to switch to the posture and the seedling planting device 4 is lowered to the planting work height position or is lowered to the planting work height position, the left line drawing marker 26 is switched to the lying posture. It is like this.

On the contrary, when the multi-contact switch 34 detects that the operating lever 31 has reached the right marker operating position R, the electromagnetic cylinder 30 for the holding mechanism 29 for holding the right drawing marker 26 in the upright posture is operated. Then, the right drawing marker 26 is allowed to switch to the lying posture, and the seedling planting device 4 is lowered to the planting work height position, or when it is lowered to the planting work height position, The wire drawing marker 26 is adapted to switch to the lying posture.

That is, when the operating lever 31 is operated from the neutral position N to the upper manual raising operating position U1 even though the operating lever 31 has a simple structure, the operating lever is moved to the operating position U1. It becomes possible to perform the manual raising operation of raising the seedling planting device 4 and stopping the raising at an arbitrary height position only while maintaining 31. Conversely, the operation lever 31 is manually lowered downward from the neutral position N. When the operation position D1 is operated, the operation lever 31 is moved to the operation position D1.
It is possible to perform a manual lowering operation of lowering the seedling planting device 4 and stopping the lowering at an arbitrary height position only while maintaining the position, and the operation lever 31 is moved upward from the neutral position N to a manual raising operation position. When the automatic raising operation position U2 beyond U1 is operated, the automatic raising operation for automatically raising the seedling planting device 4 to a predetermined upper limit position can be performed, and conversely, the operation lever 31 is manually moved downward from the neutral position N. When the automatic lowering operation position D2 beyond the lowering operation position D1 is operated, it becomes possible to perform an automatic lowering operation of automatically raising the seedling planting device 4 to a predetermined planting work height position, and to the automatic lowering operation position D2. When the second operation to the operation position D2 is performed as the next operation of the operated operation lever 31, the seedling planting device 4 and the fertilizer application device 5 can be switched to the operating state, and the automatic lowering The next operation of the operating lever 31 to the second operation of the operation position D2 is performed manually raised operating position above the neutral position N U1 or automatically raised operating position U
When the operation of No. 2 is performed, the seedling planting device 4 and the fertilizer application device 5 can be switched to the non-operating state, and the seedling planting device 4 can be manually raised or automatically raised according to the operation positions U1 and U2. Further, when the operation lever 31 is operated to the left marker operation position F, it is possible to switch to the lying posture in which the left line drawing marker 26 acts, and conversely, the operation lever 31 is moved to the right position. When the marker operation position R is operated, it is possible to switch to the laid posture in which the right-side drawing marker 26 is operated.

Further, the automatic raising operation position U of the operation lever 31
2 during the automatic raising operation of the seedling planting device 4 based on the operation to 2, the operation lever 31 from the neutral position N to the manual lowering operation position D1
When the operation is performed, the seedling planting device 4 can be stopped from being lifted up at the intermediate position at that time, and conversely, the operation lever 31
Seedling planting device 4 based on the operation of the automatic descending operation position D2
If the operation lever 31 is operated from the neutral position N to the manual raising operation position U1 during the automatic lowering operation of the, the seedling planting device 4 can be stopped to descend at the intermediate lowering position at that time,
Thereby, the intention is to operate the operation lever 31 from the neutral position N to the upper manual raising operation position U1 to perform the manual raising operation for raising the seedling planting device 4 to an arbitrary height position.
When the operating lever 31 is operated by mistake to the automatic raising operating position U2 beyond the manual raising operating position U1, the operating lever is moved to the lower manual lowering operating position D1 which is the opposite direction to the erroneous operating direction. If 31 is operated, the automatic raising operation of the seedling planting device 4 due to the erroneous operation can be immediately stopped, and thereafter, the operation lever 31 is operated to the manual raising operation position U1, whereby the seedling planting device 4 is operated. It is possible to manually raise it to any height position, and conversely, to manually lower the seedling planting device 4 to any height position by operating the operation lever 31 from the neutral position N to the lower manual lowering operation position D1. If the operator intends to perform the descending operation but mistakenly operates the operation lever 31 to the automatic descending operation position D2 beyond the manual descending operation position D1, it is in the opposite direction to the erroneous operation direction. If the manual raised operating position U1 to operate the operation lever 31, NaeUe with device 4 based on the erroneous operation
The automatic lowering operation can be immediately stopped, and then the operation lever 31 is operated to the manual lowering operation position D1 so that the seedling planting device 4 can be manually lowered to an arbitrary height position. ing.

Moreover, if there is no notification sound from the buzzer 39, the operation of the operation lever 31 at that time is not operated up to the automatic raising operation position U2 or the automatic lowering operation position D2. It is an operation to the raising operation position U1 or the manual lowering operation position D1, and it is possible to let the driver know that the manual raising / lowering operation of the seedling planting device 4 according to the operation is performed, and the buzzer 39 If the notification sound is once, the operation lever 31 at that time
Is an operation to the automatic raising operation position U2 or the automatic lowering operation position D2 beyond the manual raising operation position U1 or the manual lowering operation position D1, and the seedling planting device 4 according to the operation.
It is possible to let the driver know that the automatic raising / lowering operation is performed, and if the alarm sound from the buzzer 39 is twice, the operation of the operation lever 31 at that time exceeds the manual lowering operation position D1. It is the second operation to the automatic lowering operation position D2, and it is possible to let the driver know that the seedling planting device 4 and the fertilizer application device 5 are switched to the operating state. It is possible to easily determine whether or not the operation of the operation lever 31 of
If the operation of the operation lever 31 at that time is improper, proper operation by the operation lever 31 can be promptly performed against the erroneous operation.

As described above, the control device 32 causes the sensor float 15 to move along with the running of the machine while the seedling planting device 4 is automatically stopped at the predetermined planting work height position.
When the robot fluctuates vertically and deviates from the predetermined reference posture, the operation of the electromagnetic switching valve 33 is controlled based on the detection information from the float sensor 35 at that time, and the sensor float 15 returns to the predetermined reference posture. The seedling planting device 4 is moved up and down to that position. To explain this elevating control in detail, when the control device 32 lowers the seedling planting device 4 based on the deviation from the predetermined reference posture of the sensor float 15 which is the detection information from the float sensor 35,
When the flow rate of the hydraulic oil discharged from the hydraulic cylinder 2 becomes an n-th order function (for example, a quartic function) of the deviation at that time, or when the seedling planting device 4 is raised, the hydraulic cylinder The gain is set so that the flow rate of the hydraulic oil supplied to 2 is equal to or smaller than the n-th order function of the deviation at that time (for example, a third-order function), whereby the seedling planting device Although it is possible to quickly return the sensor float 15 to a predetermined reference posture by moving up and down 4, it is possible to prevent the ascending speed of the seedling planting device 4 from becoming faster than the descending speed. It has become possible to effectively suppress the generation of floating seedlings caused by floating from the mud surface.

[Other Embodiments] Other embodiments of the present invention will be listed below. (1) The working machine may be a direct seeder or a tractor.

(2) During the automatic raising operation of the seedling planting device 4 based on the operation of the operating lever 31 to the automatic raising operation position U2, the operating lever 31 is automatically lowered from the neutral position N over the manual lowering operation position D1. Even when the seedling planting device 4 is operated to the operation position D2, the seedling planting device 4 stops ascending at the intermediate ascending position at that time, and conversely, the seedling planting device based on the operation of the operation lever 31 to the automatic lowering operation position D2. Even when the operation lever 31 is operated from the neutral position N to the automatic raising operation position U2 beyond the manual raising operation position U1 during the automatic lowering operation of 4, the seedling planting device 4 is in the descending middle position at that time. It may be configured to stop descending at.

(3) As the notification device 39, an alarm, a voice generator or the like may be adopted.

(4) When the multi-contact switch 34 detects that the operation lever 31 has reached the automatic raising operation position U2 or the automatic lowering operation position D2, and when the multi-contact switch 34 detects the automatic lowering operation position D2 of the operating lever 31. As the next detection after the arrival at the
The second arrival of the operating lever 31 to the multi-contact switch 3
4, the length of the notification sound generated by the notification device 39 may be changed, or the timbre may be changed.

(5) Even when the multi-contact switch 34 detects that the operating lever 31 has reached the manual raising operation position U1 or the manual lowering operation position D1, the informing device 39
May generate a notification sound. In this configuration, for example, when the multi-contact switch 34 detects that the operating lever 31 has reached the manual raising operation position U1 or the manual lowering operation position D1, the notification device 39 notifies the operator while the detection is continued. Sound is generated and the operation lever 3
When the multi-contact switch 34 detects the arrival of the automatic raising operation position U2 or the automatic lowering operation position D2 of 1, the notifying device 39 generates the notifying sound twice in succession, and the multi-contact switch 34 causes the operation lever 31 to move. When the second contact of the operation lever 31 to the automatic lowering operation position D2 is detected by the multi-contact switch 34 as the next detection after the arrival to the automatic lowering operation position D2 is detected, the notification device 39 notifies the alarm sound. May be generated three times in succession.

(6) When the multi-contact switch 34 detects that the operating lever 31 has reached the manual raising operation position U1 and when it has detected that the manual lowering operation position D1 has been reached, the notification device 39 is activated. The number of notification sounds to be generated and the tone color may be changed, and the multi-contact switch 34
The number of notification sounds generated by the notification device 39, the tone color, and the like are detected depending on whether the operation lever 31 has reached the automatic raising operation position U2 or the automatic lowering operation position D2. You may change it.

[Brief description of drawings]

[Fig. 1] Overall side view of the riding rice transplanter

FIG. 2 is a block diagram showing a control configuration.

FIG. 3 is a flowchart showing the control operation of the control device at the time of raising the seedling planting device.

FIG. 4 is a flowchart showing the control operation of the control device when the seedling planting device lowering operation is performed.

[Explanation of symbols]

1 traveling aircraft 4 working equipment 31 controls 39 Notification device D1 Manual lowering operation position D2 Automatic lowering operation position N neutral position U1 Manual raising operation position U2 automatic raising operation position

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2B062 AA02 AA11 AB01 BA02 BA09                       BA22 BA26                 2B304 KA08 LA02 LA04 LA09 LA20                       LB05 LB16 MA03 MC11 PA01                       PB05 PC01 PD02 PD17 QA03                       QA22 QA25 QB02 QB12 QC03                       QC12 RA10 RA14 RB06

Claims (5)

[Claims] 1. An operating structure of a working machine in which a working device is connected to a rear portion of a traveling machine body so as to be capable of being driven up and down, and when a neutral return type operation tool is operated from a neutral position to a manual raising operation position, the operating position is set to the operating position. The working device rises while the operating tool is maintained, and when the operating tool is operated from the neutral position to the automatic raising operation position beyond the manual raising operation position, the working device reaches a predetermined upper limit position. When it is automatically raised and the operating tool is operated from the neutral position to the manual lowering operation position, the working device is lowered while the operating tool is maintained at the operating position, and the operating tool is moved from the neutral position to the manual operation position. When the working device is operated to the automatic lowering operation position beyond the manual lowering operation position, the working device is automatically lowered to a predetermined working height position, and the working device is operated based on the operation of the operating tool to the automatic raising operation position. When the operation tool is operated from the neutral position to the manual lowering operation position during the dynamic ascent, the working device stops the ascent at the intermediate ascent position at that time, and the operation tool is operated to the automatic lowering operation position. When the operating tool is operated from the neutral position to the manual raising operation position during the automatic lowering of the working device based on the working device, the working device is configured to stop the lowering at the intermediate lowering position at that time. Operation structure. 2. The work device is configured to switch to an operating state when a second operation is performed on the operation tool from the neutral position to the automatic lowering operation position and then to the operation position. The operating structure for the working machine according to claim 1. 3. An informing device for producing an informing sound when the operating tool reaches either of the automatic raising operation position and the automatic lowering operation position.
The operating structure of the work machine described in. 4. When the operating tool reaches any one of the manual raising operation position, the automatic raising operation position, the manual lowering operation position, and the automatic lowering operation position, the operating position is changed according to the respective operating positions. The operating structure of the working machine according to claim 1 or 2, further comprising an informing device for generating the informing sound. 5. An operating structure for a working machine, wherein the working machine is connected to a rear part of a traveling machine body so as to be capable of being driven up and down. When the neutral return type operation tool is operated from the neutral position to an automatic raising operation position, the working machine is operated. Is automatically raised to a predetermined upper limit position, and when the operating tool is operated from the neutral position to the automatic lowering operation position, the working device is automatically lowered to a predetermined working height position, and the operating tool is moved from the neutral position to the When the second operation is performed to the operation position after the operation to the automatic lowering operation position, the working device is configured to switch to the operating state, and when the operating tool reaches the automatic lowering operation position. Along with this, a notification device is provided which generates a notification sound according to the case where the work device automatically descends to a predetermined work height position based on the operation and the case where the work device switches to the operating state. Operation structure of the work machine.