JPH0432022Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is designed so that the main switch of the seedling alarm circuit is automatically turned ON when the locking device of the main clutch lever is operated to the "off" position and locked at the start of planting work. This invention relates to a seedling warning device for a riding rice transplanter.

In the field of riding rice transplanters, the mechanisms of each part of the machine are becoming more precise and sophisticated year by year, improving the performance of the machine. However, while the improved performance of the aircraft makes it more convenient, it also requires complicated operations such as various lever operations and switch operations to control each part of the aircraft, which increases the burden on the operator. For example, when replenishing seedlings, the movement of the machine must be stopped and the driving of the planting section must also be stopped, and the related levers must be operated individually, and the same various lever operations must be performed when resuming planting. In addition, it is necessary to turn on various switches (for example, the main switch of a seedling alarm device), but these operations are cumbersome and cause some inconveniences, such as forgetting to operate them.

Therefore, the present invention is designed to simplify the complicated lever operation when replenishing seedlings and greatly reduce the burden on the operator. In a riding rice transplanter that connects and disconnects via a main clutch lever, a locking device for the main clutch lever is provided opposite to the front of the pedal portion of the main clutch lever so as to be tiltable in the front and rear directions, and the locking device is connected to and disconnected from the main clutch lever. With the lever in the "disengaged" position, the main clutch lever can be freely switched between a lockable position and a non-lockable position, and the locking device is set in the lockable position, and the main clutch lever is depressed to the clutch disengaged position. When the main clutch lever is locked, the main clutch lever is automatically locked in the clutch disengaged position by a locking device, and when the main clutch lever is locked, the pedal portion of the main clutch lever and the locking device are held close to each other in a position where they can be operated simultaneously with one foot. The planter is configured so that the lock can be released with the foot while the pedal is placed on the pedal, and the planting portion is equipped with a device that senses the decrease in the number of seedlings when the number of seedlings on the seedling platform decreases below a predetermined amount. A seedling sensor is provided to close the alarm circuit of the seedling alarm device, and the main switch of the seedling alarm device is configured to be turned on only when the lock device is in the lockable position.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, FIG. 1 is an overall side view of a riding rice transplanter. A driver's seat 5 is provided at the rear, and various lever groups a and switches b are arranged around the driver's seat 5, and a hood 6 and a driver's seat 5 are provided.
Auxiliary seedling stands 7 are installed on both left and right sides of the tree, and a running section A is formed by these. Behind the running section A is a planting section B consisting of a float 8 for sliding on the rice field, a planting rod 9, a seedling stand 10, etc.
are connected via a parallel link mechanism 11 so as to be able to rise and fall freely, and power from the engine 4 is transmitted to the rear wheel 2 via a transmission 12, and is also transmitted from a PTO shaft (not shown) to the planting section B. The transmission is made to move the planting rod 9 up and down and the seedling platform 10 to move back and forth from side to side. Numeral 13 is a seedling sensor installed on the front side of the seedling tray 10 in the direction of feeding out the seedlings.When the number of seedlings (not shown) on the seedling tray 10 decreases below a predetermined amount, the sensor 13 is turned on and the seedling sensor is turned on. A warning circuit (not shown) is closed and a warning lamp 14 provided on the bonnet 6 flashes to instruct the operator to replenish the seedlings. A main switch, which will be described later, is interposed in this circuit. A seedling alarm device C is constituted by these.

15 is a main clutch lever that connects and disconnects power transmission from the engine 4 to the traveling section A and the planting section B, and when the pedal section 15' is depressed, the rod 16
When the pulley 18 separates from the transmission belt 20 through the tension arm 17 against the tension spring 19 and the main clutch is disconnected, and when the foot is released from the pedal portion 15', the pulley 18 is automatically moved to the transmission belt 20 side by the tension spring 19. The main clutch is now engaged. 21 is an engine pulley, and 22 is a main shaft pulley of the transmission 12.

23 is a locking device for the main clutch lever 15 having a pedal portion 23'b;
Reference numeral 3 indicates that the main clutch lever 15 can be freely switched between a lockable position and a non-lockable position with respect to the main clutch lever 15 when the main clutch lever 15 is in the "disengaged" position, and with the locking device 23 set in the lockable position. When the main clutch lever 15 is depressed to the clutch disengaged position, the main clutch lever 15 is automatically locked in the clutch disengaged position by a locking device 23. In the illustrated example, a lock lever 23' having a notch 23'a for engagement and a pedal part 23'b faces the front of the main clutch lever 15 and is connected to the main clutch lever 15 via a pivot pin 23'c and a toggle spring 23'd for positioning. The lock lever 2 is attached to the step 3a so that it can be tilted forward and backward.
3' to the rear, that is, to the main clutch lever 15 side as shown by the phantom lines in FIGS. 2 and 4, the pedal portion 15' of the main clutch lever 15
When the lever 15 is depressed, the pin 15'' protruding from the lever 15 initially slides into contact with the upper rear surface of the lock lever 23' and pushes the lock lever 23' forward against the toggle spring 23'd, causing the clutch to "disengage".
At this position, the pin 15'' engages with the notch 23'a, and the main clutch lever 15 is automatically locked in the "disengaged" position, and even after the main clutch lever 15 is locked, the toggle spring 23 remains even if the foot is released from the pedal part 15'. The main clutch lever 15 is held locked in the clutch "disengaged" position by the resilient force of 'd. And main clutch lever 1
When the lever 15 is locked, the pedal portion 15' of the lever 15 is locked.
and the pedal portion 23'b of the locking device 23 are held close to a position where they can be operated simultaneously with one foot (left foot),
The lock is released by pushing forward the pedal part 23'b of the locking device 23 with the foot placed on the pedal part 15' of the main clutch lever 15. Note that when the lock lever 23' is tilted forward as shown by the solid line, no locking action is performed and normal clutch lever operation is possible.

Reference numeral 24 denotes a main switch of the seedling warning device C, and this main switch 24 is configured to be turned on only when the locking device 23 is in the lockable position. In the illustrated example, the main switch 24 is located in front of the lower part of the lock lever 23' and is fixed to the fuselage cover 6a, and when the lock lever 23' is in the lockable position, the main switch 24 is fixed to the fuselage cover 6a. The lower front edge presses the operating rod 24a of the main switch 24 to keep the main switch 24 in the ON state.

Next, the operation of the present invention will be explained. To start the planting operation, the seedlings are placed on the seedling stand 10, and the lock lever 23' is tilted toward the main clutch lever 15 as shown by the phantom line in FIG.
At this time, the lock lever 23' presses the operating rod 24a of the main switch 24 of the seedling alarm device C, so the main switch 24 is automatically turned on. However, at this time, the seedling sensor 13 provided on the seedling stand 10 is turned off due to the weight of the seedling, so the seedling alarm circuit is open and the alarm lamp 14 does not blink. Now, when the number of seedlings on the seedling platform 10 decreases below a predetermined amount after the start of the planting work (the rear edge of the seedling bed soil
When the seedling sensor 13 detects this and turns on, the seedling alarm circuit closes and the alarm lamp 14 flashes, indicating to the operator that it is time to replenish the seedlings. do. Therefore, when the operator depresses the main clutch lever 15 in order to supply seedlings, the clutch is disengaged, stopping the movement of the machine and the operation of the planting section B. At the same time, the pin 15'' of the main clutch lever 15
Since the clutch is engaged with the notch 23'a of the clutch 3' and locked in the "disengaged" position, the power transmission from the engine 4 remains cut off even if the foot is removed from the pedal part 15'. . Therefore, when replenishing seedlings, unlike conventional systems, there is no need to perform various troublesome tasks such as depressing the main clutch lever to cut off power transmission, then operating the main gear shift lever to the neutral position, and then operating the planting clutch lever to the "off" side. A single operation of the related levers is required, and when resuming work after replenishing seedlings, the lock state is released by depressing the pedals 15' and 23'b at the same time, and at the same time the machine moves and the planting section B is started. Because it operates, there is no need for the same complicated lever operations as above. By the way, when the main clutch lever 15 is unlocked when restarting the planting work, etc., the lock can be released with the left foot while placing it on the tread surface of the pedal portion 15' of the lever 15, so that the amount of movement of the treadle foot is minimized. Not only is this possible, but it is also possible to reliably prevent the engine from stalling due to the main clutch lever 15 suddenly returning upward to the clutch engagement side due to the elastic force of the tension spring 19 at the same time as the lock is released.

In this way, in the present invention, by simply tilting the lock lever 23 toward the main clutch lever 15 before starting the planting operation, there is no need for complicated lever operations when replenishing seedlings, and it is possible to restart the conventional planting operation. The operation of turning on the main switch of the seedling alarm device C, which was sometimes performed separately, is no longer necessary, and the burden on the operator is greatly reduced. Also, when driving on the road, if you forget to return the lock lever 23, a warning will be issued (because there are no seedlings on the seedling platform 10 and the open circuit is energized), so do not forget to return the lock lever 23. It can be prevented.

Since the present invention is constructed as described above, by simply switching the locking device to the lockable position at the start of planting work, the main clutch lever can be automatically moved to the clutch disengaged position at the same time as the clutch disengagement operation by depressing the main clutch lever. This not only greatly simplifies the complicated operations such as various lever operations and switch operations required when replenishing seedlings, but also greatly reduces the burden on the operator. When releasing the lock of the main clutch lever, you can easily release the lock with your foot while placing your foot on the tread surface of the main clutch lever pedal, so the amount of movement and operation of the foot can be minimized, and it is easy to release the lock. At the same time, it is possible to reliably prevent the engine from stalling due to the main clutch lever suddenly returning upward to the clutch engagement side, and it also eliminates mistakes such as forgetting to turn on the main switch of the seedling alarm circuit, and also prevents the engine from stalling when driving on the road. Although it has a simple structure, it has extremely useful practical effects such as being able to reliably prevent forgetting to switch the device.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a riding rice transplanter equipped with the present invention, Fig. 2 is an explanatory diagram of the operation of the main parts, and Figs. 3 and 4 are a plan view and a side view showing enlarged main parts, respectively. be. In the figure, A is a traveling part, B is a planting part, 10 is a seedling stand, 13 is a seedling sensor, 15 is a main clutch lever, 15' is a pedal part, 23 is a locking device, 2
3'b is the pedal section.

Claims (1)

[Scope of utility model registration request] In a riding rice transplanter in which power transmission to a traveling part and a planting part is connected/disconnected via a main clutch lever having a pedal part, a locking device for the main clutch lever is provided opposite to the front of the pedal part of the main clutch lever. is provided so as to be freely tiltable in the longitudinal direction, and the locking device can be freely switched between a lockable position and a lockable position with respect to the main clutch lever when the main clutch lever is in the "disengaged"position;
In addition, when the main clutch lever is depressed to the clutch disengaged position with the lock device set in the lockable position, the main clutch lever is automatically locked in the clutch disengaged position by the lock device, and the main clutch lever is When locked, the main clutch lever pedal and locking device are held close together in a position where they can be operated simultaneously with one foot.
The planter is configured so that the lock can be released with the foot while the foot is placed on the pedal, and the planting portion is configured to sense the decrease in the number of seedlings on the seedling platform when the number of seedlings decreases below a predetermined amount. A seedling sensor is provided to close the alarm circuit of the seedling alarm device, and the main switch of the seedling alarm device is only activated when the locking device is in the lockable position.
A seedling alarm device for a riding rice transplanter, characterized in that it is configured to turn on.