JP5490055B2 - Seed tape laying machine - Google Patents

Description

  The present invention relates to a seed tape laying machine for laying a seed tape having seeds arranged at a predetermined interval on a farm field or the like.

When laying a seed tape on a field or the like, a seed tape laying machine is used that feeds the seed tape wound in a reel shape and lays the seed tape to a predetermined depth.
FIG. 6 shows an example of a conventional seed tape laying machine.
A shaft hole 3 is formed at one end of the frame 2, and a front wheel 4 having a shaft 41 that rotates with respect to the shaft hole 3 is attached. A shaft hole 5 is formed at the other end of the frame 2, and a rear wheel 6 having a shaft 61 that rotates with respect to the shaft hole 5 is attached. A seeding pipe 7 is attached between the shaft hole 3 and the shaft hole 5 of the frame 2. The sowing pipe 7 can be adjusted in the vertical direction with respect to the frame 2. A reel holder 10 that holds a reel 9 around which the seed tape 8 is wound is attached to the frame 2. The reel 9 is rotatable with respect to the reel holder 10. Furthermore, a handle 11 for the operator to press the seed tape laying machine 1 is attached to the frame 2.

FIG. 7 is a diagram for explaining a method of using a conventional seed tape laying machine.
The operator moves the sowing pipe 7 in the vertical direction and adjusts the depth at which the seed tape 8 is laid (seeding depth). Next, the end of the seed tape 8 is pulled out from the reel 9, the end of the seed tape 8 is inserted through the upper end hole 71 of the sowing pipe 7, and discharged from the lower end hole 72 of the sowing pipe 7 entering the field 81. To do.
When the operator pushes the handle 11 in such a state, the seed tape 8 is laid at a seeding depth adjusted in advance.

Since the conventional seed tape laying machine 1 works manually as described above, when the farm field is sloping ground or the worker is old and weak, the work is heavy labor.
As a method for solving this problem, there is a seeder that mounts a battery and a motor and transmits the power of the motor to wheels to enable self-running (Patent Document 1). However, since the wheels are always driven by a motor, battery consumption is large, and it is not suitable for long-time work.

JP 2007-31678 A

In the system that always drives the motor, when seed tape is laid on a large area of the field, the battery must be made larger, the weight becomes heavier, and the weight of the seed tape laying machine itself increases. It was difficult to work efficiently.
The present invention has been made paying attention to the above-mentioned problems, and its purpose is to mount a battery and a motor on a seed tape laying machine and transmit the power of the motor to the wheels so that it can be self-propelled to reduce the work burden on the operator. By reducing and detecting the speed of the seed tape laying machine, by providing a control circuit that stops the motor if it exceeds a predetermined speed and re-drives the motor if it falls below a predetermined speed, An object of the present invention is to provide a seed tape laying machine that can operate continuously for a long time while suppressing battery consumption.

In order to achieve the above object, claim 1 of the present invention provides a seed tape laying machine for laying a seed tape on a field or the like, a battery, a motor driven by the battery, and a transmission means for transmitting the drive of the motor to the wheels. , A traveling speed detecting means for detecting the traveling speed of the seed tape laying machine, and determining and controlling the driving / stopping of the motor based on the speed signal obtained from the traveling speed detecting means, and the traveling speed detecting means has a predetermined speed. The transmission means is provided with a one-way clutch that freely rotates the driving wheel in the traveling rotation direction when the motor is stopped.
A second aspect of the present invention is characterized in that in the first aspect of the present invention, speed adjusting means for adjusting the traveling speed of the seed tape laying machine steplessly is provided.
According to a third aspect of the present invention, in the first or second aspect of the invention, the seed tape laying machine includes a front wheel and a rear wheel, and a seeding device other than the seed tape laying device is provided between the front wheel and the rear wheel. It is characterized by.

  According to the above configuration, it is possible to assist the work by driving the motor below a predetermined speed, and to stop the motor above the predetermined speed to suppress battery consumption. When climbing, the motor can be driven to assist the work, and when descending, the motor can be stopped and work can be done manually, reducing the burden on the worker and enabling continuous work for a long time. be able to. In addition, it is effective for reducing the work load of a weak elderly person and in a badly cultivated field. In the unlikely event that the battery cannot be driven due to battery exhaustion, it is possible to work manually.

It is a side view which shows embodiment of the seed tape laying machine by this invention. It is the figure which looked at the operation box from the direction of arrow B of FIG. It is a circuit block diagram which shows embodiment of the circuit of the seed tape laying machine by this invention. It is a flowchart which shows the flow of operation | movement of the seed tape laying machine by this invention. It is a figure for demonstrating the change of the speed with respect to driving | running | working of a seed tape laying machine, and the state of a motor drive. It is a figure which shows an example of the structure of the conventional seed tape laying machine. It is a figure for demonstrating the usage method of the conventional seed tape laying machine.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing an embodiment of a seed tape laying machine according to the present invention.
In the following description, the same reference numerals are used for the same structural parts as in the conventional example, and the description of the structure is omitted.
A DC motor 13 is installed above the rear wheel 6, and a gear 15 is fixed to a motor shaft 14 that is an output shaft of the DC motor 13. A gear 17 is attached to the shaft 61 of the rear wheel 6 via a one-way clutch 16. When the DC motor 13 is driven, the one-way clutch 16 connects the shaft 61 and the gear 17 to transmit the driving force from the DC motor 13 to the rear wheel 6 to rotate the rear wheel 6 in the arrow A direction. Further, when the DC motor 13 is stopped, the shaft 61 and the gear 17 are not coupled, so that the rear wheel 6 can freely rotate in the arrow A direction.

The gear 15 and the gear 17 are connected by a chain 18, and the driving force of the DC motor 13 is transmitted to the shaft 61 by the chain 18. The power transmission means between the DC motor 13 and the shaft 61 may use a combination of a pulley and a belt or a gear in addition to the gear and the chain.
A gear 19 is fixed to the shaft 41 of the front wheel 4, and a proximity sensor 20 that detects the number of teeth of the gear 19 is attached above the gear 19.
An operation box 22 containing a control circuit 21 (see FIG. 3) that receives a signal from the proximity sensor 20 and controls the driving of the DC motor 13 is attached to a position where the operator of the handle 11 can easily operate.

FIG. 2 is a view of the operation box as viewed from the direction of arrow B in FIG. 1 and is a view showing a panel surface of the operation box.
A power switch 23 on the panel surface, a power indicator 26 that displays power on, a battery indicator 27 that displays the remaining battery level, and a speed switch for switching the driving speed of the DC motor to high speed, medium speed, and low speed. A stop switch 25 for stopping the switch 24 and the DC motor is arranged.

FIG. 3 is a circuit block diagram showing an embodiment of the circuit of the seed tape laying machine according to the present invention.
A control circuit (CPU controller) 21 housed in the operation box 22 is connected to a power switch 23, a speed changeover switch 24, a battery remaining amount indicator lamp 27, and a stop switch 25, which are arranged on the panel surface of the operation box. ing. Further, the battery 12 and the DC motor 13 are connected, and further a remaining amount check IC 29 for checking the voltage of the battery 12 is connected. Further, the output of the proximity sensor 20 that counts the number of teeth of the front wheel gear is connected.

The control circuit 21 controls the DC motor 13 only when the power switch 23 of the operation box 22 is turned on. The speed control of the DC motor 13 is performed by PWM-controlling the input voltage by the control circuit 21 and outputting it at a predetermined duty ratio.
When the power switch 23 is in the ON state, when the proximity sensor 20 detects the number of teeth of the gear 19 twice or more, the DC motor 13 is driven.
The control circuit 21 is a platform that starts from a stopped state, and gradually increases the drive voltage to the DC motor 13 from 0 V and controls it to reach a predetermined voltage (speed) (soft start), so that the operator can be safe. You can start working.

After the start of traveling, the signal detected by the proximity sensor 20 is sent to the CPU of the control circuit 21 in the operation box 22, and the control circuit 21 performs a comparison operation with a predetermined speed (speed threshold value). If the speed is less than the speed threshold, the DC motor 13 is driven. If the speed threshold is exceeded, the DC motor 13 is stopped.
The speed can be detected from the number of times the proximity sensor 20 detects the number of teeth of the gear 19 within a predetermined time and the diameter of the front wheel 4.
By switching the speed change switch 24 of the operation box 22, the set speed can be selected in three stages according to the work ability and physical strength of the worker. In this embodiment, switching is made to low speed, medium speed, and high speed, and the drive voltages of the DC motor at low speed, medium speed, and high speed are respectively E _L , E _M , E _H (E _L <E _M <E _H ). The speed threshold values are set to V _LL , V _ML , and V _HL (V _LL <V _ML <V _HL ), respectively. Slow, medium and fast DC motor driving voltage E _L, E _M, the speed of the flat land species tape laying machines are driven by E _H is _{V L, V M, V H} (V L <V M <V _H ) (see FIG. 5).

When the operator stops traveling, the operator turns on the stop switch 25 of the operation box 22. At this time, the control circuit 21 stops the DC motor 13 by a signal from the stop switch 25.
The control circuit 21 lights the power indicator lamp 26 when the power switch 23 is turned on to indicate that the control circuit 21 is energized.
The control circuit 21 constantly monitors the input voltage to the control circuit 21, that is, the battery voltage by the battery remaining amount check IC 29. When the input voltage becomes lower than a predetermined voltage, the battery remaining amount indicator lamp 27 is turned on. Informs that the battery is low.

FIG. 4 is a flowchart for explaining the flow of operation of the control circuit, and FIG. 5 is a diagram for explaining the change in speed and the motor drive state with respect to the running of the seed tape laying machine.
Hereinafter, the description will proceed along the flow of FIG.
When working with the seed tape laying machine, whether it is pushed by human power or driven by a motor is determined by turning on and off the power switch 23 (step (hereinafter referred to as “S”) 001).
If the operator adjusts the depth of the seeding pipe 7 and presses the seed tape laying machine in the target field without turning on the power switch 23, the work is performed manually (S002).
If the power switch 23 is turned on, the control circuit 21 detects the rotational speed of the wheel, and determines whether the rotational speed of the wheel is two times or more (S003).
When the rotational speed of the wheel is 2 times or more, the driving of the DC motor 13 is started, the driving voltage is gradually increased, and when the set voltage is reached, the seed tape laying machine reaches the set speed (S007) (a in FIG. 5). ). In a flat agricultural field, it proceeds at a set speed (b in FIG. 5). When going uphill, the set voltage applied to the seed tape laying machine does not change, but the speed of the seed tape laying machine decreases (c in FIG. 5).

When flattening from the uphill, the seed tape laying machine has a reduced speed, reaches the set speed and proceeds (d in FIG. 5). Further downhill, the seed tape laying machine increases from the set speed, and when the speed threshold is reached, the control circuit 21 cuts off the motor drive voltage (e in FIG. 5). If the downhill continues, the speed of the seed tape laying machine increases with the motor drive voltage turned off (f in FIG. 5). When it becomes flat over time, the speed of the seed tape laying machine decreases and falls below the speed threshold (g in FIG. 5). When the speed of the seed tape laying machine falls below the speed threshold, the driving of the DC motor 13 is started, the drive voltage is gradually increased, and when the set voltage is reached, the seed tape laying machine reaches the set speed (see h in FIG. 5). ).
Seed tape laying machines will behave like this in fields with flat, uphill and downhill fields.

On the other hand, when the power switch 23 is turned on in S001, the control circuit 21 turns off the remaining battery level indicator lamp 27 (S004), and then checks the remaining battery level (S005). As a result of checking the remaining battery level, if the voltage is higher than the set voltage, the remaining battery level indicator lamp 27 is kept off. If the voltage is lower than the set voltage, the battery level indicator lamp 27 is turned on (S006).
Further, the control circuit 21 monitors whether or not the stop switch 25 is turned on by the operator (S008).
If the stop switch 25 is turned on, the output of the motor is turned off (S009), and the operation returns to the wheel rotational speed detection operation (S003). If the position where the stop switch 25 is turned on is flat and uphill, and the wheel does not rotate twice or more, it stops at that position. If it is a downhill and the number of rotations of the wheel does not become 2 or more, it stops at that position as well.

Next, the control circuit 21 monitors whether or not the speed changeover switch 24 is switched (S010, S015, S020). If the speed selector 24 is made to switch to the high speed position, the set voltage E _H motor drive voltage, speed thresholds, each set to V _HL, speed is fast speed threshold species tape laying machine It is determined whether or not the value V _HL has been reached (S011, S012). If it is less than the high speed threshold value V _HL , the process returns to the step of monitoring whether or not the stop switch 25 of S008 is turned on. When the high speed threshold value V _{HL is} exceeded, the motor output is turned off (S013). Then, it is determined again whether or not the high speed threshold value V _HL has been reached (S014). If it is above the high speed threshold value V _HL , the motor output is kept off. If it is less than fast speed threshold V _HL, it returns to the front of the soft-start of the S007. In the soft start, the driving of the DC motor 13 is started, the driving voltage is gradually increased, and when the high set voltage E _H is reached, the seed tape laying machine reaches the high set speed V _H on the flat ground.

On the other hand, as long changeover speed selector 24 to the intermediate speed position, the set voltage of the motor drive voltage is E _M, the rate threshold is set to the V _ML, and the speed of the medium speed is the speed of the seed tape laying machine It is determined whether or not the threshold value _VML has been reached (S016, S017). If it is less than the medium speed threshold value V _ML , the process returns to the step of monitoring whether or not the stop switch 25 of S008 is turned on.
When the speed threshold value V _ML exceeds the medium speed, the motor output is turned off (S018). Then, it is determined whether reaches the speed threshold V _ML medium speed again (S019). If it is above the medium speed threshold value _VML , the motor output is kept off. If it is less than the medium speed threshold value V _ML , the process returns to the previous stage of the soft start of S007. The soft-start starts the driving of the DC motor 13, gradually increasing the driving voltage reaches the set voltage of the medium-speed E _M seed tape laying machine will set speed V _M of the medium speed.

Further, as long changeover speed selector 24 to the low speed position, the set voltage E _L of the motor drive voltage, speed threshold is set to the V _LL, seed tape laying machine speed is slow speed threshold It is determined whether or not V _LL has been reached (S021, S022). If it is less than slow speed threshold V _LL, returning to the step of monitoring whether the stop switch 25 of the S008 is turned on.
If more than slow speed threshold V _LL, turns off the motor output (S023). Then, it is determined whether again or reaches the slow speed threshold V _LL (S024). If it is above the low speed threshold _VLL , the motor output is kept off. If it is less than the low speed of the speed threshold V _LL, it returns to the front of the soft-start of the S007. In the soft start, the driving of the DC motor 13 is started, the driving voltage is gradually increased, and when the low set voltage _EL is reached, the seed tape laying machine becomes the low set speed V _L.

  Although the above embodiment explained the example using the seed tape seeding device, the same applies to the type that does not use the seed tape, for example, the laying machine equipped with the seeding device of the type that seeds and lays the seed directly at a predetermined interval. Can be applied to. Furthermore, although the example which switches the drive speed of a seed tape laying machine to low speed, medium speed, and high speed was demonstrated, the speed to change can also be adjusted in a stepless manner.

  This is a seed tape laying machine that lays seed tapes with seeds arranged at predetermined intervals on a farm field or the like.

1 type tape laying machine 2 frame 3 shaft hole 4 front wheel 41 shaft 5 shaft hole 6 rear wheel 61 shaft 7 seeding pipe 71 upper end hole 72 lower end hole 8 type tape 9 reel 10 reel holder 11 handle 12 battery 13 DC motor 14 motor shaft 15, 17, 19 Gear 16 One-way clutch 18 Chain 20 Proximity sensor 21 Control circuit (CPU controller)
22 Operation Box 23 Power Switch 24 Speed Switch 25 Stop Switch 26 Power Indicator Light 27 Battery Level Indicator Light

Claims (3)

Has front and rear wheels, a seed tape laying machine for laying the seed tape, etc. in the field,
A battery mounted on the seed tape laying machine ;
A motor for running start and self running support driven by the battery,
A power switch for connecting the battery to the motor;
And transmission means for transmitting a drive output of the motor to the wheel,
A traveling speed detection means for detecting a running speed from one of the wheels of the seed tape laying machine,
Running speed signal obtained from said running speed detecting means, the set speed signal, and speed threshold (where the speed threshold> set speed value) the motor by calculating determine the driving and stopping point of the motor based on A control circuit for generating a motor operation signal to be operated;
Said transmission means, when the motor is stopped, in species tape laying machine in which a one-way clutch driving wheels to freely rotate in the traveling direction of rotation,
In the control circuit, the speed threshold value and the set speed have been set, the power switch is turned on, the motor is turned on in the soft start step, and when the set speed is reached, the vehicle keeps running and the speed threshold in the running state. The seed tape laying is characterized in that the motor is turned off when the value exceeds the value, and the motor is turned on when the speed exceeds the speed threshold and enters the set speed side when the motor is turned off. Machine. The traveling speed of the above-mentioned tape laying machine is as follows : the driving voltage of the motor at low and high speeds is E _L and E _H (E _L <E _H ), and the speed threshold is V _LL and V _HL (V _LL < V , respectively). V _HL ), and
The seed tape laying machine according to claim 1 , wherein the control circuit is configured to drive the motor when the proximity sensor detects the number of teeth of the gear rotating together with any of the wheels twice or more . When the control circuit of the seed tape laying machine starts from a stop state, the drive voltage to the motor is gradually increased from 0V and controlled so as to reach a predetermined voltage (speed) (soft start). The signal detected by the proximity sensor is sent to the CPU of the control circuit, and the control circuit compares it with a predetermined speed (speed threshold value). If the speed is lower than the speed threshold value, the motor is driven and the speed threshold is set. 3. The seed tape laying machine according to claim 1 , wherein the motor is stopped when the value is exceeded .

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