JPH099746A - Power transmission in transplanter - Google Patents

Abstract

PURPOSE: To provide a power transmission in a transplanter enabling crop space to be controlled in high accuracy through the operation of a crop space setting means and ensuring crop space not to be set unnecessarily beyond a specified level. CONSTITUTION: In this power transmission so designed that, when a planting cup comes to a specified stop point, an electromagnetic clutch is temporarily let out for 'off' time according to the operational amount of a crop space setting means 104 to obtain a specified crop space, there is equipped a control means 111 so designed that the 'off time' for the electromagnetic clutch correspondingly to the operational amount of the crop space setting means 104 is set longer when a speed change mechanism is subjected to variable-speed operation toward higher speed side, and the 'off time' for the electromagnetic clutch correspondingly to the operational amount of the crop space setting means 104 is set shorter when the speed change mechanism is subjected to variable- speed operation toward lower speed side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device for an implanter.

[0002]

2. Description of the Related Art In a transplanter, a traveling device is interlocked with a drive unit such as an engine, and a planting cup is interlocked with a drive unit such as an engine through an oscillating link mechanism.
While running with a traveling device, there is one in which the planting cup is repeatedly moved up and down by the drive device, and the planting cup is pierced into the ridge at the bottom dead center for transplanting pot seedlings. In the power transmission device of the transplanter, an electromagnetic clutch for connecting and disconnecting the interlock between the drive device and the planting means is provided, and inter-plant setting means for increasing / decreasing the disconnection time of the electromagnetic clutch is provided, and the planting cup is placed at a predetermined stop position. When it comes, the electromagnetic clutch is temporarily disengaged with a disconnection time according to the operation amount of the inter-plant setting means, the planting cup is stopped, the pot seedling is received here, and the planting cup is moved up and down to set the planting interval. The desired strain was obtained (for example, Japanese Patent Application No. 4-270519).

[0003]

However, in the conventional case,
The traveling speed at the time of planting is not variable (the work speed is only one step). Therefore, for example, if the mission speed reduction ratio is adjusted to lettuce for which transplant accuracy is required,
The cabbage, which requires high-speed transplantation, has a problem of reduced work efficiency.

Therefore, it is conceivable to provide a speed change mechanism between the drive device and the traveling device so that the traveling speed can be set to a plurality of speeds. However, if the speed change mechanism is simply provided,
Because the mileage changes while the planting cup moves up and down,
That is, since the travel distance with respect to the disengagement time of the electromagnetic clutch changes according to the operation amount of the stock setting device, for example, when the speed change mechanism is set to the high speed side, the adjustment range between stocks with respect to the operation amount of the stock setting device becomes large. Therefore, it becomes difficult to adjust the stock spacing with high accuracy, and if the manipulated variable of the stock trading setting means is set to be near the maximum, the stock spacing is set larger than necessary.

In view of the above problems, the present invention does not cause a problem that the work efficiency is lowered even for lettuce requiring a transplanting precision, cabbage requiring a high-speed transplantation, and the like.
Moreover, the stock price can be adjusted accurately by operating the stock price setting means, and the stock price is prevented from being set larger than necessary.

[0006]

The first technical means of the present invention for solving this technical problem is provided with a traveling device 14 and a planting cup 33 that moves up and down, and the traveling device 1
4 and the planting cup 33 are interlockingly connected to the drive unit 5, and a transmission mechanism 65 is provided between the drive unit 5 and the traveling unit 14 so that the transplanter can travel at a plurality of traveling speeds. 5 is provided with an electromagnetic clutch 72 for connecting and disconnecting the interlocking between the planting cup 33 and the planting cup 33, and a stock setting unit 104 for increasing and decreasing the disengagement time of the electromagnetic clutch 72 is provided. , When the planting cup 33 has reached a predetermined stop position, the stock-between-settings means 104
In the power transmission device of the transplanter in which the electromagnetic clutch 72 is temporarily disengaged with a disengagement time according to the operation amount to obtain a predetermined stock distance, the stock distance setting is performed when the speed change mechanism 65 is speed-shifted. When the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the means 104 is set to be long and the speed change mechanism 65 is operated to shift to the low speed side, the stock distance setting means 1
A control means 111 for setting a short disconnection time of the electromagnetic clutch 72 with respect to the operation amount of 04 is provided.

The second technical means of the present invention is a transmission mechanism 6.
5, there is provided an inter-stock selection switch 103 for detecting the gear shift state, and in accordance with the detection of the inter-stock selection switch 103, the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the inter-stock setting means 104 is automatically changed and set. Third of the present invention
The technical means of (1) is provided with a stock selection switch 103 for detecting that the transmission mechanism 65 has been operated to shift to the high speed side,
When the stock selection switch 103 detects that the transmission mechanism 65 is operated to shift to the high speed side, the stock setting means 104.
The point is that the electromagnetic clutch 72 is automatically set to have a longer disconnection time with respect to the operation amount.

[0008] A fourth technical means of the present invention is to adjust the stock price depending on the operation amount of the stock price setting means 104 when the speed change mechanism 65 is operated to the high speed side and to the low speed side. The control means 1 so that the adjustment widths of
11, the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the stock setting unit 104 is changed and set.

The fifth technical means of the present invention is that the inter-stock setting means 104 is configured to increase / decrease the disengagement time of the electromagnetic clutch 72 in a plurality of steps.

[0010]

When the speed change mechanism 65 is operated to shift to the high speed side, the electromagnetic clutch 7 with respect to the operation amount of the stock distance setting means 104 is changed.
The cutting time of 2 is set long. When the speed change mechanism 65 is operated to shift to the low speed side, the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the stock distance setting means 104 is set to be short.

The inter-stock selection switch 103 detects the shift state of the transmission mechanism 65, and the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the inter-stock setting means 104 is automatically changed and set according to the detection. For example, when the stock selection switch 103 detects that the speed change mechanism 65 is operated to shift to the high speed side, the control unit 111 causes the electromagnetic clutch 72 to be disengaged with respect to the operation amount of the stock setting unit 104. Set automatically.

When the speed change mechanism 65 is operated to shift to the high speed side and when it is operated to shift to the low speed side, the adjustment range between the stocks corresponding to the operation amount of the stock price setting means 104 becomes substantially the same. Therefore, the problem that the work efficiency is lowered does not occur even for lettuce, which requires a transplanting accuracy, and cabbage, which requires a high-speed transplantation. Further, the stock price can be adjusted with high accuracy by operating the stock price setting means.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 3 and 9 to 11, the transplanter 1 is a self-propelled walking type having a steering handle 3 at the rear of the traveling vehicle body 2 and straddles the ridge B covered with the multi-film A in the longitudinal direction thereof. Run and plant seedlings C with soil while forming planting holes in the ridges B.

The traveling vehicle body 2 has an engine (driving device) 5 mounted on a pedestal 4 at the front thereof, and a spare seedling box mount 6 on the left and right.
The transmission case 8 is fixed to the rear part of the gantry 4, and the input part thereof and the output part of the engine 5 are interlocked by the winding transmission means 9. The power that has entered the transmission case 8 by the winding power transmission means 9 is branched into a traveling system and a transplant system, and the traveling system power is the wheel transmission shaft 10.
The power of the transplantation system is taken out from the PTO horizontal axis 11 and PT.
It is taken out from the O front-rear shaft 54.

At the left and right ends of the wheel transmission shaft 10, a transmission case 13 that swings up and down about the axis is pivotally supported, and the left and right traveling drive wheels (traveling devices) 14 are supported through the transmission case 13. The traveling drive wheels 14 can be driven by the winding transmission means 13a in the transmission case 13. The left and right traveling drive wheels 14 roll in the groove between the ridges B. Left and right transmission case 1
By vertically swinging about the shaft center of the wheel transmission shaft 10, the relative vertical position of the traveling drive wheel 14 and the traveling vehicle body 2 can be adjusted. Therefore, a stay is provided in front of the gantry 4 via a stay. The grounding sensor 15 is provided, and the lifting cylinder 16 that operates according to the detection signal of the grounding sensor 15 is provided. By the operation of the lifting cylinder 16, the left and right transmission cases 13 are moved up and down to adjust the height of the traveling vehicle body 2. Horizontal control.

The main frame 17 of the traveling vehicle body 2 is formed of a square pipe or the like into a substantially L-shape in plan view and side view, and a front portion thereof is bent downward and is attached to one side portion of the mount 4 to which the engine 5 is attached. It is fixed and the midway part is the traveling vehicle body 2.
Is arranged substantially horizontally in the front-rear direction on one of the left and right sides, and the rear portion is bent to the other side, and the steering handle 3 is attached.

Reference numeral 19 denotes a transplanting work section, which is a seedling feeding device 2
0, a planting device 21, a multi-punching device 22, etc., which are PTO horizontal axes 1 protruding from the mission case 8.
The front part of the movable frame 24 is pivotally supported by the movable frame 24. The rear portion of the movable frame 24 can be raised and lowered and is elastically and elastically connected to the main frame 17 by elastic supporting means 25.

A crushing roller (or soil-covering roller) 26 provided at the rear portion of the movable frame 24 has an adjustable distance between the movable frame 24 and the movable frame 24 via an adjusting rod 27.
The height of the movable frame 24 can be adjusted.
The movable frame 24 supports a winding transmission means body 29 for transmitting power to the planting device 21 and the like. Planting device 2
As shown in FIG. 2 and FIG.
A suspension link 31 having 0 is pivoted, said support 30
A parallel link 32 is pivotally supported on the parallel link 32, and a beak tubular openable planting cup 33 is provided at the tip of the parallel link 32. The parallel link 32 is vertically movable by a crank motion of a crank shaft 34 that interlocks with a winding transmission means 29. Has been done. When the planted cup 33 is raised by the rotation of the crank shaft 34, it is detected by the upper limit detection switch 28 (shown in FIG. 3). The upper limit detection switch 28 is provided above the parallel link 32 and detects that the planting cup 33 is at the top dead center.

Although not shown, the planting cup 33 is also provided.
An opening / closing means is provided between the movable frame 24 and the movable frame 24 so that the beak is opened when it descends and pierces the ridge B. When the beak is pierced and opened, a hole is formed in the ridge B. Open and plant seedlings C with soil. The multi-punching device 22 is provided in front of the planting cup 33. The punching device 22 has a gas burner that uses gas such as propane gas in the gas cylinder 35 as a fuel, and precedes the raising and lowering of the planting cup 33 by one cycle, so that the multi-film A covered on the ridge B is evenly spaced in the longitudinal direction. Incinerate with a gas burner to form holes.

In addition, in FIG. 9, reference numeral 36 denotes the traveling vehicle body 2.
A pair of left and right front wheels on the front part of 37 and 37 are ridge-and-shoulder copying rollers, respectively. Seedling supply device 2 in transplantation work section 19
0 guides the seedling box 38 made of a flexible resin in which the seedlings C with soil are grown in a large number of pots arranged vertically and horizontally by the left and right guide rails 39 supported by the movable frame 24, and the seedling box 38 is potted. The seedlings C with soil are pushed out by a pusher from the pot portion in one horizontal row and dropped and supplied to the planting cup 33 after vertical feeding at every pitch.

Various methods can be used for supplying the seedlings C with soil from the seedling box 38 to the planting cup 33. After the vertical feeding of the seedling box 38, the seedlings with soil can be simultaneously fed from the pot portion in one row. C is pushed out by a pusher and received by a conveyor, the conveyor is intermittently conveyed, and seedlings C with soil thereon are sequentially dropped and supplied to the planting cup 33, or the seedling box 3
8 is fed longitudinally and then transversely at every 1 pot pitch, and the seedlings C with soil are pushed out one by one with the pusher while pushing out the nails from the pots in one row horizontally, and while changing the posture of these nails, the planting cup 33, there is a method of moving the soiled seedlings C from the nails and dropping the soiled seedlings C into the planting cup 33, and the like, and the movable frame 24 is provided with a seedling feeding device 20 that appropriately adopts these methods. There is.

FIG. 3 shows details of the power transmission system in the mission case 8. In FIG. 3, the power of the engine 5 is transmitted from the winding transmission means 9 to the input shaft 51. A rotation shaft 52, an intermediate shaft 53, a back shaft 57, a wheel transmission shaft 10 and a PTO lateral shaft 11 are rotatably supported by the transmission case 8 in parallel with the input shaft 51, and the front and rear PT
An O front-rear shaft 54 is provided so as to project rearward.

The gear 51a on the input shaft 51 is meshed with the idle gear 55 on the rotary shaft 52, and the clutch gear 56 is slid on the idle gear 55 so that the meshing portion of the clutch gear 56 meshes with the idle gear 55. Power can be transmitted from the shaft 51 to the rotary shaft 52. The clutch gear 56 is elastically pressed in the direction in which it engages with the idle gear 55, and constitutes a pawl-type main clutch 58.

On the rotary shaft 52, gears 59, 60, 61 are supported so as to be integrally rotatable in addition to the clutch gear 56, and a transmission gear body 62 is slid and integrally rotated on the intermediate shaft 53. A gear portion 62A, which is freely supported and is capable of selectively meshing with the gears 56, 59, and 60, is attached to the transmission gear body 62.
62B and 62C are formed. The back shaft 57 is provided with gears 63 and 64. The gear 63 is the gear 6 described above.
The gear portion 62C of the transmission gear body 62 can be meshed with the gear 64. Therefore, sliding of the speed change gear body 62 enables shifting of three forward gears and one reverse gear. That is, the transmission gear body 62, the gear 60, the gear 59, and the gear 56 constitute a transmission mechanism 65, and when the gear portion 62C is engaged with the gear 60, the first forward speed F
₁ (planting 1), when the gear portion 62B meshes with the gear 59, the second forward speed F ₂ (planting 2), and when gear portion 62A meshes with the gear 56, the third forward gear F ₃
(Move). Further, when the gear portion 62C is connected to the back shaft 57 side, the vehicle is in reverse R.

A transmission gear 66 and a parking brake (not shown) are provided on the intermediate shaft 53.
Engages with a large gear 68 fixed to the wheel transmission shaft 10. One end of the rotary shaft 52 projects from the transmission case 8, an electromagnetic clutch 72 is fixed to the outer end of the rotary shaft 52, and a cylindrical coupling shaft 73 surrounds the outer end of the rotary shaft 52. Is rotatably supported by the mission case 8, and the rotary shaft 52 and the coupling shaft 73 are integrally rotated by the operation of the electromagnetic clutch 72, so that the transplantation system power can be branched and taken out.

A gear 74 is fixed to the coupling shaft 73, and the gear 74 meshes with an idler gear 75 loosely fitted to the intermediate shaft 53. The idler gear 75 is further combined with a gear 76 on the PTO horizontal shaft 11. It meshes with each other and enables the power of the transplant system to be transmitted. A bevel pinion 77 is fixed to the PTO horizontal shaft 11, and the bevel gear 7 on the PTO front-rear shaft 54 is fixed.
8 and meshes with the power of the transplantation system into two systems,
The planting device 21 on the TO horizontal axis 11 via the power transmission means 29.
The multi-piercing device 22 drives the seedling feeding device 20 by the PTO front-rear shaft 54.

A rotation pulse sensor 85 is attached to the outer end of the rotary shaft 52 with respect to the electromagnetic clutch 72. As the rotation pulse sensor 85, for example, a structure in which the proximity sensor counts the unevenness of the sprocket fitted and fixed to the rotation shaft 52 can be used.
Is detected and 20 pulses are generated for each rotation of the rotary shaft 52.

Therefore, the crankshaft 34 is set to 1 from the raised state of the planting cup 33 (the upper limit detection switch 28 is detected).
Each time it is rotated, as shown in FIG. 4, the planting cup 33 is lowered from the raised state and then returned to the raised position again. Planting cup 3
When 3 returns to the ascending position, the electromagnetic clutch 72 is demagnetized to turn off the power of the transplantation system, as shown in FIG.
No. 3 stops in the ascending state, and a stock distance equal to or greater than the reference minimum stock distance (160 mm or 260 mm) corresponding to one rotation of the crankshaft 34 is obtained. That is, if the stock distance is set by the control means 111 to be described later, when the upper limit detection switch 28 detects the rise of the planting cup 33, the electromagnetic clutch 72 is demagnetized to turn off the power of the transplantation system to correspond to the set stock. Then, the electromagnetic clutch 72 counts the pulses during demagnetization, and then the electromagnetic clutch 72 is operated to transmit the power of the transplantation system, and the rising planting cup 33 is lowered to plant. The stock distance is adjusted by changing the count number of the pulses during which the electromagnetic clutch 72 is demagnetized.

Then, the reference minimum stock spacing between the first speed F ₁ (planting 1) and the second speed F ₂ (planting 2),
The rotation speed of the crankshaft 34 and the rotation speed of the rotation shaft 52 are shown in FIG.
It is set as shown in. That is, when the speed change mechanism 65 is set to the forward first speed F ₁ (planting 1), the transplanter travels 160 mm and the rotary shaft 52 makes three revolutions while the crankshaft 34 makes one revolution. Further, when the speed change mechanism 65 is set to the forward second speed F ₂ (planting 2), the transplanter travels 260 mm and the rotary shaft 52 makes three revolutions while the crankshaft 34 makes one revolution.

The rotation pulse sensor 85 generates 20 pulses of signal for each rotation of the rotary shaft 52, and the first speed F ₁ (planting 1) and the second speed F ₂ (planting 2). Crankshaft 34 is 1 during the standard minimum stock when
The number of pulses generated by the rotation pulse sensor 85 during rotation and the distance traveled by the transplanting machine while one pulse is generated by the rotation pulse sensor 85 (between stocks / one pulse) are set as shown in FIG.

FIG. 1 shows a block diagram of a control system. In FIG. 1, 100 is a battery, 101 is a main switch, 102 is a main clutch switch, and the main clutch 5
8 is a switch for connecting the switch. Reference numeral 103 denotes a stock selection switch, which is attached to, for example, a gear shift operation section for gear shifting the gear shift mechanism, and detects when the gear shift mechanism 65 is set to the forward second speed F ₂ (planting 2). Are configured to turn on. 104
Is a stock-to-stock setting means for setting the stock-to-stock setting. The stock-to-stock setting switch 105 and the stock-to-stock setting variable resistor 106 are provided. The stock-to-stock setting switch 105 can be switched between two stages (A and B) of on and off. 106 is 7 steps (1,
2,3,4,5,6,7), and therefore the inter-strain setting means 104 as a whole is shown in FIG. 6, FIG. 7, FIG. 9, and FIG.
14 steps (A-1, A-2, A-3, A-
4, A-5, A-6, A-7, B-1, B-2, B-
3, B-4, B-5, B-6, B-7).

Reference numeral 108 denotes a planting cup relay, which when energized, is a solenoid 72a of the electromagnetic clutch 72.
An electric current flows through the electromagnetic clutch 72 via the planting cup relay 108. Reference numeral 111 denotes a control means, which is configured by a microcomputer having a function of counting the pulses from the rotation pulse sensor 82 and other arithmetic processing functions, and includes an upper limit detection switch 28, a main clutch switch 102, an inter-stock selection switch 103, and an inter-stock selection switch. Signals from the stock setting switch 105 and the stock setting variable resistor 106 of the setting means 104 are input to control the electromagnetic clutch 64 in accordance with a predetermined set control sequence. The control means 111 controls the planting cup relay 108. A disconnection control unit 112 for controlling the disconnection of the electromagnetic clutch 72 via a connection, a connection control unit 113 for controlling connection of the electromagnetic clutch 72, and a disconnection period setting unit 114 for setting a disconnection period of the electromagnetic clutch 72. .

When the stock selection switch 103 is off (planting 1), the cutting period setting means 114 determines the planting 1 shown in FIG. 6 from the conditions set by the stock setting means 104.
Table, the disconnection period of the electromagnetic clutch 72 (the number of pulses of the rotation pulse sensor 82 for disconnecting the electromagnetic clutch 72) is set, and the stock selection switch 103 is also used.
Is on (planting 2), the disengagement period of the electromagnetic clutch 72 (electromagnetic clutch 7 is determined by the table of the planting 2 shown in FIG.
(The number of pulses of the rotation pulse sensor 82 for cutting 2)
Set. That is, when the stock selection switch 103 is off (planting 1), the stock setting means 104 as shown in FIG.
Each time the number of stages set by is increased by one, the disengagement period of the electromagnetic clutch 72 is set so as to be increased only during the period in which the rotation pulse sensor 85 generates 5 pulses. For example, the number of stages set by the stock setting unit 104 is A. When it is -6, the disengagement period of the electromagnetic clutch 72 is set to 25 pulses. When the stock selection switch 103 is turned on (planting 2), the electromagnetic pulse 72 is disengaged by 3 when the number of steps set by the stock setting means 104 is increased by 1 as shown in FIG. It is set so as to increase only during the period in which pulses are generated, and for example, the inter-stock setting means 104
When the number of stages set by is A-6, the electromagnetic clutch 72
The cutting period is set to 15 pulses.

The disconnection control means 112 disconnects the electromagnetic clutch 72 when the upper limit detection switch 28 is turned on, and the disconnected state of the electromagnetic clutch 72 reaches the disconnection period of the electromagnetic clutch 72 set by the disconnection period setting means 114. If not, that is, the set electromagnetic clutch 72
When it is determined that the value obtained by sequentially subtracting the number of input pulses in the disengaged state of the electromagnetic clutch 72 from the number of pulses in the disengagement period is greater than 0, the electromagnetic clutch 72 is disengaged.

The connection control means 113 connects the electromagnetic clutch 72 when the upper limit detection switch 28 is off, and the disengaged state of the electromagnetic clutch 72 is the disengagement period setting means 1.
When the disengagement period of the electromagnetic clutch 72 set by 14 is reached, that is, the value obtained by sequentially subtracting the number of pulses input in the disengaged state of the electromagnetic clutch 72 from the set pulse number of the disengagement period of the electromagnetic clutch 72 becomes 0. When it is determined that the electromagnetic clutch 72 has been released, the electromagnetic clutch 72 is connected.

Next, the operation will be described with reference to the flowchart of FIG. For porting work, main switch 10
1. If the main clutch switch 102 is turned on, in step 1, the electromagnetic clutch 72 is turned on and the transplant work is started. In step 2, it is determined whether the upper limit detection switch 28 is on or off. If the upper limit detection switch 28 is off, the process returns to step 1, and if the upper limit detection switch 28 is on, the process proceeds to step 5 and the electromagnetic clutch 72 Turn off.

Therefore, while the crankshaft 34 makes one revolution,
The electromagnetic clutch 72 holds the ON state, the planting cup 33 descends from the raised state, is planted, and then returns to the raised position. At this point, the electromagnetic clutch 72 is turned off. In step 4, it is determined whether the stock selection switch 103 is on or off, and if the stock selection switch 103 is off, in step 5, the electromagnetic field is set by the table of the planting 1 shown in FIG. 6 from the condition set by the stock setting means 104. Clutch 7
A disconnection period of 2 (the number of pulses of the rotation pulse sensor 82 for disconnecting the electromagnetic clutch 72) is set, and the process proceeds to step 6.

If it is determined in step 4 that the stock selection switch 103 is on, the process proceeds to step 7 and step 7
Then, from the conditions set by the inter-stock setting means 104, as shown in FIG.
The electromagnetic clutch 72 by the table of the planting 2 shown in FIG.
Of the rotation pulse sensor 82 for disconnecting the electromagnetic clutch 72 is set, and the process proceeds to step 8.

In step 6, whether or not the disengaged state of the electromagnetic clutch 72 has reached the disengagement period of the electromagnetic clutch 72 set in step 5, that is, from the number of pulses in the disengagement period of the electromagnetic clutch 72 set in step 5. It is determined whether the electromagnetic clutch 72 is in the disengaged state and the value obtained by sequentially subtracting the number of input pulses is 0. If the value is not 0, the process returns to step 3 to disconnect the electromagnetic clutch 72, and the value is 0. If so, return to step 1 and connect the electromagnetic clutch 72.

In step 8, whether or not the disengaged state of the electromagnetic clutch 72 has reached the disengagement period of the electromagnetic clutch 72 set in step 7, that is, from the number of pulses in the disengagement period of the electromagnetic clutch 72 set in step 5. It is determined whether the electromagnetic clutch 72 is in the disengaged state and the value obtained by sequentially subtracting the number of input pulses is 0. If the value is not 0, the process returns to step 3 to disconnect the electromagnetic clutch 72, and the value is 0. If so, return to step 1 and connect the electromagnetic clutch 72.

Therefore, the speed change mechanism 65 is set to the forward first speed F ₁
When set to (planting 1), as shown in FIG. 8, the transplanter 1 travels for the minimum distance between the reference stocks (160 mm) while the crankshaft 34 makes one rotation. Although the stock distance becomes 2.67 mm and becomes a low speed state, each time the number of steps set by the stock setting means 104 increases by one step, the electromagnetic clutch 72 is disengaged only during the period when the rotation pulse sensor 85 generates three pulses. Since it is set to increase, inter-share setting means 1
The stock adjustment per step set by 04 is about 1
It becomes 3.3 mm.

If the second forward speed F ₂ (planting 2) is set, the transplanter 1 travels for the minimum standard stock distance (260 mm) while the crankshaft 34 makes one revolution, as shown in FIG. As a result, the stock distance per pulse of the rotary pulse sensor 85 becomes 4.33 mm, and the speed becomes high.
At this time, if the stock selection switch 103 is off, the stock adjustment amount per stage set by the stock setting means 104 is about 21.7 mm.
When the number of stages set by the stock price setting means 104 is increased by one by turning on, the disengagement period of the electromagnetic clutch 72 is set so as to increase only during the period in which the rotation pulse sensor 85 generates 5 pulses. Means 104
The inter-share adjustment amount per step set by
mm.

Therefore, when the speed change mechanism 65 is operated to the high speed side (the second forward speed F ₂ (planting 2)), the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the inter-stock setting means 104 is set to be long. The adjustment range between stocks according to the operation amount of the stock setting device 104 is substantially the same when the speed change mechanism 65 is operated to the high speed side and to the low speed side.

Although the engine 5 is used as the driving device in the above embodiment, a motor or the like may be used as the driving device instead. Further, the present invention is not limited to the above embodiment, but can be variously modified. For example, the electromagnetic clutch 72 may be attached to the intermediate shaft 53 so as to connect and disconnect the power between the intermediate shaft 53 and the gear 75. Further, although the transplanter 1 is exemplified for the multi-ridge, it may be for the ridge not covered with the multi-film, that is, the multi-piercing device 22 may not be provided.

Further, in the above-described embodiment, the stock-between-stock selection switch 103 for detecting that the speed change mechanism 65 has been shifted to the high speed side is provided, and the stock-between stock selection switch 103 is operated to shift the gear change mechanism 65 to the high speed side. When it detects that
The electromagnetic clutch 72 is automatically set so that the disengagement time of the electromagnetic clutch 72 with respect to the operation amount of the stock-between-setting means 104 becomes longer. However, instead of this, the stock-between-selection that detects that the speed change mechanism 65 is operated to the low speed side is selected. A switch 103 is provided, and when the stock selection switch 103 detects that the speed change mechanism 65 is operated to shift to a low speed side, the stock setting unit 1
You may make it set automatically so that the disconnection time of the said electromagnetic clutch 72 with respect to the operation amount of 04 may be shortened.

In the above embodiment, the speed change mechanism 65 can be set to the forward first speed (planting 1) and the forward second speed F ₂ (planting 2). The number of gears for planting is not limited to three, and may be set to three or more.

[0047]

EFFECTS OF THE INVENTION According to the present invention, it is possible to prevent the problem that the work efficiency is lowered even for lettuce requiring a high transplanting accuracy and for cabbage requiring a high speed transplanting. Moreover, it is possible to accurately adjust the stock price by operating the stock price setting means, and it is possible to prevent the stock price from being set larger than necessary.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart.

FIG. 3 is an explanatory diagram of a power transmission system inside a mission case.

FIG. 4 is an explanatory diagram showing a locus of a planting cup.

FIG. 5 is a diagram showing a relationship between a reference minimum stock and a rotation speed of a shaft with respect to the number of planting stages.

FIG. 6 is a diagram showing a disengagement period of an electromagnetic clutch set by an inter-stock setting unit.

FIG. 7 is a diagram showing a disengagement period of the electromagnetic clutch set by the stock price setting means.

FIG. 8 is a diagram showing the relationship between the minimum number of stocks, the amount of adjustment between stocks, etc. with respect to the number of planting stages.

FIG. 9 is a side view of the entire transplanter.

FIG. 10 is a plan view of the entire transplanter.

FIG. 11 is a side view of the rear half of the transplanter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 transplanter 2 traveling vehicle 5 engine 14 traveling drive wheel 33 planting cup 65 speed change mechanism 20 seedling supply device 72 electromagnetic clutch 103 stock selection switch 104 stock setting means 111 control means

Claims (5)

[Claims] 1. A traveling device (14) and a planting cup (33) that moves up and down are provided, and the traveling device (14) and the planting cup (33) are interlockingly connected to a drive device (5), and transplantation is performed. A speed change mechanism (65) is provided between the drive device (5) and the traveling device (14) so that the machine can travel at a plurality of traveling speeds, and the drive device (5) and the planting cup (33) are connected to each other. An electromagnetic clutch (72) for connecting / disconnecting the interlocking of the electromagnetic clutch (72), an inter-stock setting means (104) for increasing / decreasing the disengagement time of the electromagnetic clutch (72) are provided, and the planting cup (33) is attached to the planting cup (33) by the drive unit (5). Move up and down, and attach the planting cup (3
3) When a predetermined stop position is reached, the inter-stock setting means (10
4) The electromagnetic clutch (72) with the disconnection time according to the operation amount.
In the power transmission device of the transplanter for temporarily disconnecting the plant to obtain a predetermined stock distance, the electromagnetic force relative to the operation amount of the stock setting means (104) when the speed change mechanism (65) is operated to shift to a high speed side. The electromagnetic clutch (72) is set with respect to the operation amount of the stock setting means (104) when the disengagement time of the clutch (72) is set to be long and the transmission mechanism (65) is operated to shift to the low speed side.
A power transmission device for a transplanter, characterized in that a control means (111) for setting a short cutting time is provided. 2. An inter-stock selection switch (103) for detecting a speed change state of the speed change mechanism (65) is provided, and the inter-stock setting means (104) is provided in response to the detection of the inter-stock selection switch (103).
The power transmission device of the transplanter according to claim 1, wherein the disconnection time of the electromagnetic clutch (72) is automatically changed and set with respect to the operation amount of. 3. An inter-stock selection switch (103) for detecting that the transmission mechanism (65) has been operated to shift to a high speed side, and the inter-stock selection switch (103) is provided with the transmission mechanism (6).
5. When it is detected that 5) is gear-shifted to the high speed side, it is automatically set so that the disengagement time of the electromagnetic clutch (72) with respect to the operation amount of the stock setting means (104) becomes longer. 1. The power transmission device for a transplanter according to 1. 4. The adjustment range between the stocks according to the operation amount of the stock setting means (104) is substantially different when the speed change mechanism (65) is operated to the high speed side and to the low speed side. 4. The disconnection time of the electromagnetic clutch (72) with respect to the operation amount of the stock price setting means (104) is changed and set by the control means (111) so as to be the same. The power transmission device of the transplanter according to 1. 5. The transplantation according to claim 1, wherein the inter-strain setting means (104) is configured to increase / decrease a disengagement time of the electromagnetic clutch (72) in multiple stages. Power transmission device of machine.