JPH0364082B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention connects a working device to a traveling machine body using an actuator so that it can be raised and lowered freely, and when the working device is in a raised position, it is possible to lower the working device. This invention relates to a working machine equipped with a locking mechanism for blocking the work.

[Prior Art] Conventionally, as shown in Japanese Unexamined Patent Application Publication No. 57-26508, a working machine having the above-mentioned configuration has conventionally used an oil passage from a hydraulic valve to a hydraulic cylinder that raises and lowers the seedling planting device of a rice transplanter. Some are equipped with a lowering lock valve.

[Problem that the invention seeks to solve]

Generally, when a rice transplanter runs on the road,
By raising the seedling planting device and closing the locking valve, the seedling planting device is prevented from dropping unexpectedly due to a leaf in the hydraulic oil while the vehicle is running.

Incidentally, if the locking valve is closed, the seedling planting device will not be raised or lowered even if the operating lever for raising and lowering the seedling planting device is operated, and the lowering of the seedling planting device due to operator error will also be prevented. That will happen.

However, for example, when driving the rice transplanter on the road after planting seedlings, it is common to forget to close the locking valve, and improvements have been desired from a safety standpoint.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure that allows a worker to recognize that a lock operation is required when the worker forgets to lock the lowering of the work device while driving on the road.

[Means for solving problems]

The features of the present invention include a mechanism for detecting that the working device is in the raised position, a mechanism for detecting that the locking mechanism is in the unlocked state,
A notification device that mainly includes a mechanism that detects a clutch disengagement operation and a mechanism that detects a travel braking operation, and operates to request a locking operation of the locking mechanism when both of these four detection mechanisms are in the detection state. The functions and effects are as follows.

[Effect]

In other words, if we replace the working machine with a riding rice transplanter, we can raise the seedling planting device while driving on the road.
Furthermore, in order to stop the aircraft on the road, the main clutch must be disengaged and the brakes must be applied at the same time.
Therefore, as shown in FIGS. 1 and 3, the switch 11 SU indicates that the planting lever 11 is in the position to raise the seedling planting device, and the switch 9 _SU indicates that the main clutch pedal 9 is depressed. The switches _10S and _10S indicate that the left and right brake pedals 10a and 10b are being depressed simultaneously _.
However, only when the switches _31S simultaneously detect that the lower lock valves 31 are in the released state, the notification device D is activated and issues a message requesting hydraulic lock.

By the way, in this type of rice transplanter, the left and right rear wheels 2
A braking operation is to simultaneously step on the side brake pedals 10a and 10b, which independently brake the brake pedals 10a and 2b.

〔Effect of the invention〕

Therefore, by providing a relatively simple condition judgment structure that determines the operating state peculiar to when the aircraft is running on the road and the operating state of the lock mechanism, it is possible to forget the lowering lock operation and continue driving on the road. When the work is carried out, the parts to be operated can be recognized accurately, and a safe working machine has been constructed.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 4, a boarding and operating section 3 is formed in the center of a machine A that runs on front and rear wheels 1 and 2, and four rows are planted at the rear of the machine A via a link mechanism 5 that is raised and lowered by a hydraulic cylinder 4. A rice transplanter as an example of a working machine is constructed by consecutively using the seedling planting device B.

The driving section 3 includes a driver's seat 6 and a steering handle 7, a main clutch pedal 9 on the left side of the step 8, a pair of steering brake pedals 10a and 10b on the right side of the step 8, and a planting lever 11 on the right side of the driver's seat 6. Also, a seedling planting device B is provided.
A transmission case 13 driven by a transmission shaft 12 from the machine body A, and seedling stands 14 and 4 on which pine-shaped seedlings W are placed.
1 planting arm 15..., 3 planting arms and 1 soil leveling float
6..., is composed of line markers 17, 17 that lie outward from the seedling planting device B to the left and right.

As shown in FIG. 3, the planting lever 11 is at a position UP where the seedling planting device B is forcibly raised, a position M where the seedling planting device B is maintained at a constant level relative to the aircraft;
A position N in which the seedling planting device B is maintained in an automatic elevation control state and the planting arm 15 etc. is not operated, and a position DOWN in which the seedling planting device B is automatically controlled in elevation and seedlings are planted. A hydraulic valve 18 for the hydraulic cylinder 4, a planting clutch 19 that connects and disconnects the drive to the transmission shaft 12, and the soil leveling float 1, which is configured to be operable in four positions.
It is linked to 6.

That is, the planting lever 11 and the spool 18 _S of the hydraulic valve 18 are linked via the cylinder shaft 20 and the cam body 21, and the planting lever 11 and the operating lever 19a of the planting clutch 19 are connected to each other via the arm 22. , a rod 23, and a spring 24, and a link 2 between the spool _18S and the ground leveling float 16.
5 are linked via a cam body 26, a shaft 27 supporting the cam body 26, an arm 28, and a wire 29.

Incidentally, as shown in Fig. 2, the spool _18S can be operated in three positions: neutral position n, raised position u, and lowered position d, and by operating the planting lever 11, the pin provided on the spool _18S By allowing and restricting the movement of 30, the operations described above become possible.

Further, an oil passage 18c communicating with the cylinder port C of the hydraulic valve 18 is provided with a spiral lock valve 31 capable of closing the oil passage 18c.
The oil passage 18c can be closed and opened by the rotation operation of a.

Further, the steering handle 7 and the front wheel 1 are interlocked so that they can be steered, and the main clutch pedal 9 shown in FIG. 1 and a main clutch (not shown) are linked so that they can be disengaged by depressing the main clutch pedal 9. In addition, the steering brake pedals 10a and 10b and the left and right rear wheels 2
a and 2b are linked so that each brake can be braked by an independent depressing operation.

The rice transplanter is equipped with a notification device D that is activated when the operator makes an erroneous operation in order to prevent the operator from making an operational error.

That is, as shown in FIG.
1, a switch _31S detects the operation status of the seedling tray 14, a switch 14S detects that the amount of remaining seedlings in each row on the seedling tray ₁₄ has decreased below a certain level..., detects lodging on the left and right markers 17, 17, respectively. Switch 17
_S , 17 _S , a switch 11 SD , 1 is installed in the guide 32 of the planting lever 11 to detect that the planting lever 11 is operated to each of the three positions of DOWN, N, and UP _.
1 _SN , 11 _SU , a pair of steering brake pedals 10
Switches _10S and 10S detect the operation status of each a and 10b, a switch _9S detects the operation status of the main clutch pedal 9, and a switch _9S detects the rotation of the axle 34 on the axle case 33 and outputs the ON status. Detection signals from these switches and sensors 35 are input to a logic gate group 36, and furthermore, when signals from the switches etc. reach a certain condition, a signal is output from the logic gate group 36. This signal causes the memory 37...
read out the signal written in the audio generator 3, and
The notification device D is configured to output the message as human words to the speaker 39 via the speaker 8.

Further, the notification device D is configured to emit six types of words, and the operation will be explained below in the order of operation.

First, when the planting lever 11 is in the N position and the lock valve 31 is in the closed state, the words "Please release the hydraulic lock" are uttered.

Next, when the planting lever 11 is in the N position and the lock valve 31 is open and the number of seedlings remaining is below a certain level even if there is only one row, the words "please replenish seedlings" are uttered. .

Next, when the planting lever 11 is in the N position, the lock valve 31 is in the open state, the number of remaining seedlings in all four rows is above a certain level, and the sensor 35 detects the operation of the machine A, the "planting" Please put the clutch in.”
utter the words.

Next, when the planting lever is in the DOWN position, the lock valve 31 is in the open state, and the number of remaining seedlings in all four rows is above a certain level, and both the left and right markers 17, 17 are not out, " Please cut it," he said.

Next, the planting lever 11 is operated to the UP position,
When one of the operating brake pedals 10 is operated and the lock valve 31 is in the open state, the words "Please lower the planting device" are uttered.

Finally, when the planting lever 11 is operated to the UP position, the lock valve 31 is opened, both the steering brake pedals 10a and 10b are operated simultaneously, and the main clutch pedal 9 is operated, the "hydraulic lock" is activated. Please,” the words uttered.

[Another example]

In addition to the embodiments described above, the present invention applies, for example, an agricultural tractor to a working machine, uses an electric motor instead of a hydraulic cylinder to raise and lower a working device such as a tilling device, and has a lock that prevents the working device from descending. The mechanism may be mechanically constructed using pins or the like. Alternatively, the notification device may have a structure in which characters such as "Please lock the vehicle down" are written on a transparent plate, and the characters are made to stand out when a lamp is turned on.

[Brief explanation of drawings]

The drawings show an embodiment of the working machine according to the present invention, FIG. 1 is an electric circuit diagram showing the linkage between the notification device and the detection mechanism, FIG. 2 is a sectional view showing the hydraulic valve and the lowering lock valve, and FIG. FIG. 4 is a perspective view showing an operating lever, a hydraulic valve, etc., and a side view of the entire rice transplanter. A... Traveling body, 4... Actuator, 31
...Lock mechanism, 11 _SU ...Detection mechanism for rising state, 31 _S ...Detection mechanism for unlocked state, 9 _S ...
...Detection mechanism for cutting operation, 10 _S ...Detection mechanism for braking operation, D...Notification device.

Claims (1)

[Scope of Claims] 1. A lock mechanism that connects the working device B to the traveling body A so that it can be raised and lowered by an actuator 4, and prevents the working device B from descending when the working device B is in the raised position. 31, which includes a mechanism 11 _SU for detecting that the working device B is in the raised position, a mechanism 31 S for detecting that the locking mechanism 31 is in the unlocked state, and a mechanism 31 _S for detecting the disengagement of the main clutch. A detection mechanism 9 _S and a mechanism 10 _S for detecting braking operation are provided, and when these four detection mechanisms 11 _SU , 31 _S , 9 _S , and 10 _S are in the detection state, the locking mechanism 31 is locked. A work machine equipped with a notification device D that operates to request operation. 2. The work machine according to claim 1, wherein the notification device D is configured to emit a message by voice.