JP3297338B2 - Device for stopping implants in transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for stopping an implant in an implanting machine.

[0002]

2. Description of the Related Art As a transplanting machine, an implant is provided on a frame provided at a rear portion of a traveling body so as to be vertically movable via a swinging link mechanism or the like. The seedlings are supplied at the same time, and then the planting body is lowered and the lower part is pierced into the ridge. At this time, a hole provided in the lower part of the planting body is opened back and forth to form a planting hole in the ridge, There is one in which seedlings held inside a planting body in a hole are dropped and released through an opener, and the seedlings are planted in ridges while traveling.

[0003] In this transplanter, the rocking link mechanism is driven by the power from the engine to raise and lower the implant, and the power transmission system between the engine and the rocking link mechanism is connected to the power transmission system between the engine and the rocking link mechanism. An electromagnetic clutch for connecting and disconnecting power is provided, and when the plant is near a predetermined stop position at the top of its locus, the electromagnetic clutch is temporarily disconnected to stop the plant and supply seedlings here. I have to.

In this transplanter, a predetermined interval (planting interval) is obtained by adjusting the disconnection time of the electromagnetic clutch to adjust the stop time of the plant.

[0005]

In the above-mentioned prior art, even if the electromagnetic clutch is disconnected, the planting body, the oscillating link mechanism, and the power transmission mechanism have an inertial force, so that the planting body is immediately removed. There is a problem that the planting does not stop at a certain position and the seedlings cannot be received smoothly because the inertia force varies depending on the planting speed, that is, the rotation speed of the engine. There is also a problem that the interval between plants cannot be maintained at a constant interval unless the plant is stopped at a fixed position.

[0006] Further, in the transplanting machine, there is a transplanting machine provided with a braking means for applying a brake so that the implant is stopped at a predetermined position after the electromagnetic clutch is disconnected. While the braking force of the braking means is constant, the inertia force of the planting body or the like after disconnecting the electromagnetic clutch is not constant.
The implant may not stop at a predetermined position.

[0007] In view of the above problems, an object of the present invention is to consider so that a plant can be accurately stopped at a predetermined stop position.

[0008]

The technical means taken by the present invention to achieve the above object is that a traveling body 12 is provided with a planting body 61 which is driven up and down by the power of a prime mover 17. A clutch 38 for connecting and disconnecting the power transmission is interposed in a power transmission system to the planting body 61, and the clutch 38 is temporarily disconnected by detecting that the planting body 61 has reached a predetermined position on the trajectory. In the device for stopping an implant in an implanting machine provided with the detector 101, a rotation sensor K for detecting the number of rotations of the prime mover 17 is provided, and after detecting the implant 61 by the detector 101, the clutch 38 is disengaged. The cutting timing is adjusted in accordance with the rotation speed of the prime mover 17.

That is, when the rotation speed of the prime mover 17 is high,
If the inertial force of the implant 61 after disengaging the clutch 38 is large, the timing for disconnecting the clutch 38 after detecting the implant 61 by the detector 101 is advanced, and When the rotational speed is low and the inertial force of the plant body 61 or the like after the clutch 38 is disconnected is small, the timing of disconnecting the clutch 38 is delayed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 9, the vegetable transplanter 11 is a walking type having a steering handle 13 at the rear part of the traveling body 12, and while running in the longitudinal direction across the ridges 14, the soil block seedling is multi-film M (FIG. 6). See) at predetermined intervals.

The traveling body 12 includes a main frame 15, a gantry 16 provided at the front end of the main frame 15, and the like. The main frame 15 is formed of a square pipe or the like, the front part of which is bent downward and is fixed to the side of the gantry 16, and the rear part of which is bent upward so that the steering handle 13 is formed.
Mounting part. An engine (motor) 17 is mounted on a gantry 16.
8, a transmission case 19 is fixed to a rear portion of the gantry 16.

Power input from the engine 17 into the transmission case 19 is transmitted to the wheel transmission shaft 2 projecting left and right.
0, and a first PTO shaft 21 provided rearward of the wheel transmission shaft 20 and protruding left and right.
It can be taken out from the second PTO shaft 22 projecting rearward and upward. Left and right driving wheels 24 (rear wheels) are supported at the left and right ends of the wheel transmission shaft 20 via a transmission case 23 that can swing up and down around the axis thereof.
Roll in the groove between. Further, a pair of left and right front wheels 26 and a ridge height detection roller 27 are provided at a front portion of the traveling body 12.

FIG. 1 shows a power transmission system of a traveling system and a PTO system. In FIG.
7a is provided with a rotation sensor K for detecting the number of rotations of the engine 17 per unit time. This rotation sensor K is composed of a rotation pulse sensor, and has an output shaft 17.
A pulse is generated for one to several tens of pulses for one rotation of a. By counting the number of pulses T for a predetermined time, the rotation speed of the engine 17 can be detected and the fluctuation of the rotation speed of the engine 17 can be detected. It can be detected. As the rotation pulse sensor, for example, one having a structure in which the proximity sensor counts the unevenness of a sprocket externally fixed to the output shaft 17a can be employed.

The power of the engine 17 is transmitted to the input shaft 29 of the transmission case 19 by the wrapping transmission means 28.
A rotation shaft 30, an intermediate shaft 31, a back shaft 32, a wheel transmission shaft 20, and a first PTO shaft 21 are rotatably supported on the transmission case 19 in parallel with the input shaft 29, and a second PTO shaft 22 in the front-rear direction is rearward. It is provided in a protruding shape.

A gear 29a on the input shaft 29 is meshed with a free gear 33 on the rotary shaft 30.
The power can be transmitted from the input shaft 29 to the rotating shaft 30 by sliding the clutch gear 34 to engage the engaging portion. The clutch gear 34 is resiliently pressed in a direction in which it engages with the idle gear 33, and constitutes a pawl-type main clutch.

Between the rotating shaft 30 and the intermediate shaft 31,
A transmission 35 is provided which can be switched among _first forward speed (F ₁ ), second forward speed (F ₂ ), third forward speed (F ₃ ), neutral (N), and reverse (R). Also, the intermediate shaft 3
A transmission gear 36 and a parking brake (not shown) are provided on 1, and the transmission gear 36 meshes with a large gear 37 fixed to the wheel transmission shaft 20. And the wheel transmission shaft 2
Power is transmitted from 0 to the drive wheels 24 via a wrapping transmission 25 in the transmission case 23 so that the drive wheels 24 can be driven.

One end of the rotating shaft 30 protrudes from the transmission case 19, an electromagnetic clutch (clutch) 38 is fixed to the outer end thereof, and a cylindrical shaft is formed so as to surround the outer end of the rotating shaft 30. The coupling shaft 39 is rotatably supported by the transmission case 19, and the rotation of the rotation shaft 30 and the coupling shaft 39 is integrally rotated by the operation of the electromagnetic clutch 38, so that the power of the PTO system can be branched and taken out. I have.

A gear 40 is fixed to the coupling shaft 39. The gear 40 meshes with an idler gear 41 loosely fitted on the intermediate shaft 31, and the idler gear 41 further engages with a gear 42 on the first PTO shaft 21. The gears mesh with each other to enable transmission of PTO power. A bevel pinion 43 is fixed to the first PTO shaft 21, meshes with a bevel gear 44 on the second PTO shaft 22, divides the PTO power into two systems, and takes out the power from the first PTO shaft 21 and the second PTO shaft 22. The rotation power of the first and second PTO shafts 21 and 22 can be stopped without stopping the rotation power of the wheel transmission shaft 20 by demagnetizing the electromagnetic clutch 38.

At the outer end of the rotation shaft 30 from the electromagnetic clutch 38, a rotation pulse sensor 45 substantially similar to the rotation sensor K is mounted. This rotation pulse sensor 45
Is configured to generate, for example, 20 pulses for one rotation of the rotating shaft 30. At the rear part of the traveling body 12, a transplant working unit 50 is provided. This transplant working unit 50
Is a seedling supply device 51, a planting device 60 for planting the soil block seedlings supplied from the seedling supply device 51 on the ridges 14 by the planting body 61, It has a multi-film punching device 81 for punching holes. Seedling supply device 51 is 2nd P
The planting device 60 and the multi-perforation device 81 are driven by the rotational power of the first PTO shaft 21.

The seedling supply device 51 is mounted on the main frame 15, and transfers the seedling tray 46 in which a large number of pot portions 46a where the soil block seedlings are raised are arranged in a row and a row in the horizontal and vertical directions. After taking out the soil block seedlings one by one from the seedling tray 46 with the seedling removal claw 52 at a predetermined seedling removal position with respect to the planting device 60, and transferring the soil block seedlings above the planting device 60, Planting body 6
It is designed to be dropped into one.

The seedling tray 46 is made of resin and has flexibility, and is provided with a large number of pots 46a vertically and horizontally protruding from the rear surface, and soil block seedlings are raised in each pot 46a. . A transmission shaft 54 connected to the second PTO shaft 22 is connected to the power receiving shaft 53 of the seedling supply device 51 via a universal joint, and the above-described operation is repeated by the power from the transmission shaft 54.

As shown in FIGS. 7 and 8, the planting device 60 and the multi-film punching device 81 are provided on a device frame 62 supported on the first PTO shaft 21 of the transmission case 19 so as to be vertically swingable. Have been. The device frame 62 includes square pipe-shaped left and right frames 62L, 62L.
R and a connecting frame 62A connecting the left and right frames 62L and 62R. A bracket 64 is detachably attached to a front end of the right frame 62R by a fixing tool such as a bolt 63.
The first PTO shaft 21 is inserted into and supported by bearings 65 provided at the front end of the front frame 4 and the front end of the left frame 62L. The device 60 and the multi-perforation device 81 can be integrally removed from the traveling body 12.

The rear end of the device frame 62 is suspended from the main frame 15 so as to be adjustable in the vertical direction, and a soil covering / pressure reduction roller 66 is provided at the rear of the device frame 62. The planting device 60 includes a plant 6 that is pierced and moved with respect to the ridge 14 to plant the soil block seedling supplied from the seedling supply device 51 at a predetermined interval.
1 and a swing link mechanism 67 that supports the planted body 61 so as to be able to move up and down. Swing link mechanism 67
Has a first parallel link 68 whose upper end is pivotally supported by the device frame 62 so that the lower end can swing back and forth, and pivotally connects a swing plate 69 to the lower end of the first parallel link 68; The front end of the second parallel link 70 is pivotally connected to the swing plate 69, and the plant 61 is pivotally connected to the rear end of the second parallel link 70.

As shown in FIG. 4, a bearing 72 is fixed to the upper link 70a of the second parallel link 70.
A crank shaft (drive shaft) 71 rotatably supported via left and right bearings 73 is provided between the left and right frames 62L, 62R of the device frame 62.
A crank pin 71b between one crank arm 71a is inserted into the bearing 72.

A sprocket 74 is provided at the left end of the crankshaft 72, and a transmission chain 76 is wound around the sprocket 74 and a sprocket 75 provided at the left end of the first PTO shaft 21. The rotation power is transmitted to the crankshaft 71. The sprockets 74 and 75 and the transmission chain 76 are covered with a chain case 77, and the chain case 77 has a tension roller 7 for adjusting the tension of the chain 76.
8 are provided.

Accordingly, the power from the first PTO shaft 21 rotates the crankshaft 71 in the direction shown by arrow A in FIG. 3, so that the planted body 61 is vertically moved by the first and second parallel links 68 and 70. It also swings back and forth while swinging, so that when the planting body 61 pierces the ridge 14 while traveling, the planting body 61 does not substantially move forward with respect to the field. .

The planting body 61 has an upper part formed of a tubular body having an open top and a bottom, and has an opener which can be opened and closed back and forth at the lower part. When the ridge 14 enters the ridge 14, it is opened back and forth by the interlocking tool 79, and a transplant hole is formed in the ridge 14, and a soil block seedling can be planted in the transplant hole.

A scraper 80 is provided on the rear side of the planting body 61, and when the planting body 61 is moved upward by the swing link mechanism 67 after the planting body 61 has been inserted into the ridge 14, the planting body is provided. The soil adhering to the outer wall and the inner wall of 61 is scraped off. As shown in FIGS. 5 to 8, the multi-film perforating apparatus 81 includes a perforating means 82 constituted by a gas burner, and the perforating means 82 is vertically connected to the apparatus frame 62 via a parallel link 83. Have been. A cam roller 84 (cam engaging portion) is pivotally attached to the upper link 83a of the parallel link 83. The cam roller 84 is adapted to roll on the outer periphery of a disc-shaped cam 85 provided on the crankshaft 71, and the planting device 60 and the multi-perforation device 81 are connected to the same crankshaft 7.
Driving at 1 makes it possible to simplify the apparatus and reduce costs. Further, the cam roller 84 is urged by the own weight of the punching means 82 in a direction of pressing the cam roller 84 against the outer periphery of the cam 85.

A concave portion 86 is formed in a part of the cam 85 in the circumferential direction. When the cam roller 84 falls into the concave portion 86, as shown in FIG.
Moves downward, and the heating element 87 provided at the lower end of the perforation means 82 is moved downward.
Is pressed against the multi-film M so that a transplant hole is made in the multi-film M. The cam 85 is formed so as to raise the piercing means 82 immediately after piercing the multi-film M, and the other parts except the recessed portion 86 hold the piercing means 82 at the standby position of the ascending limit. In order to make the distance from the axis of the drive shaft 71 substantially constant, the outer periphery is formed in a substantially constant shape.

The cam 85 of the present embodiment is provided with
And a second cam 89 for lowering the perforating means 82 from the standby position to perforate the multi-film in the field by the perforating means 82 and raising it again to the standby position (see FIG. 5). Consists of That is, the concave portion 86 is formed in the second cam 89, the cam portion of the first cam 88 has a substantially constant outer peripheral shape, and the outer peripheral cam portion of the first cam 88 and the outer peripheral cam portion of the second cam 89 The cam 85 is constituted by the combination.

The thickness of the second cam 89 is made larger than the thickness of the first cam 88, so that the second cam 89 having the recess 86 can be reduced in abrasion while the second cam 89 has a reduced thickness. 8
The first cam 88, which does not require a member strength of about nine, is made of a thin plate to reduce the weight of the apparatus and reduce the member cost.
The first cam 88 is fixed to the crankshaft 71, and the second cam 89 is connected to the first cam 88 so as to be able to adjust the relative angle around the crankshaft 71 axis. Various configurations can be employed as such a configuration.
Bolt holes (not shown) are provided in the cam 88 at two locations in the circumferential direction, arc-shaped long holes 90 communicating with the bolt holes are provided in the second cam 89, and bolts 91 are provided in these bolt holes and the long holes 90.
And the nut (not shown) is fastened by inserting
The cam 88 and the second cam 89 can be fastened and fixed. When the bolt 91 is slightly loosened, the relative angle between the first cam 88 and the second cam 89 can be adjusted within the range of the elongated hole 90. Has become.

A nut 92 is provided near the drive shaft 71 on the side surface of the second cam 89, and an angle adjusting bolt 93 is screwed to the nut 92. A loosening prevention coil spring 94 is interposed between the nut 92 and the bolt head of the bolt 93. On the side of the first cam 88,
An engaging portion 95 with which the tip end of the bolt 93 contacts is provided. By slightly loosening the fastening force between the first cam 88 and the second cam 89, the bolt 93 is screwed toward the engaging portion 95. Fine adjustment of the relative angle between the first cam 88 and the second cam 89 can be easily performed.

The engaging portion 95 of the first cam 88 is disengaged from the engaging portion 95 even if the tip of the bolt 93 is slightly displaced from the first cam 88 by screwing the bolt 93. It is formed in a long shape in a direction orthogonal to the axis of the bolt 93 so as not to be present. Further, the device frame 62 includes:
An upper limit detection sensor (detector) 101 for detecting that the transplanting cylinder 61 is at the top dead center of the trajectory is provided. The sensor 101 is mounted on a left bearing 73 that supports the crankshaft 71. When the crank arm 71a reaches the upper limit position, the sensor 101 is detected and the sensor 101 is turned on, and the clutch 38 is turned on ( The planting interval of the soil block seedlings is controlled by switching from the connection) to off (disconnection) and temporarily stopping the driving of the transplanting work unit 50 without stopping the traveling of the traveling body 12. When it is detected that the number of pulses generated from the rotation pulse sensor 45 is a preset number of pulses, the clutch 38 is switched from off to on, and the operation of the transplanting work unit 50 is restarted.

The arm 71a is connected to the upper limit detection sensor 10
After passing 1, the sensor 101 is turned off. The device frame 62 has a braking device 10 for stopping the planting 61 at a fixed position in the middle of the trajectory when the clutch 38 is demagnetized and the driving by the crankshaft 71 is stopped.
2 are provided.

As shown in FIGS. 3 to 6, the braking device 102 mainly includes a brake arm (braking body) 96 and a brake roller (moving body) 99. The brake arm 96 is formed of a longitudinally disposed plate material that is long before and after, and is provided with a boss 96a on the front end side.
6a is attached to a support shaft 103 fixed to the right frame 62R of the device frame 62, whereby the brake arm 9
The front part 6 is rotatably supported around a left-right axis.

A U-shaped bracket 104 is disposed on the rear upper side of the brake arm 96 and is fixed to the right frame 62R of the apparatus frame 62. The upper wall 104a of the bracket 104 is attached to the upper wall 104a.
The hook bolt 105 penetrating through a is mounted and fixed by a lock nut 106 arranged above and below the upper wall 104a and screwed to the hook bolt 105. A cushioning member 98 made of an elastic material or the like is attached and fixed to the lower surface of the lower wall 104b of the bracket 104.

The engaging bolt 105 and the brake arm 9
A tension coil spring 97 is interposed between the rear end 6 and the rear end side. The urging force of the coil spring 97 urges the brake arm 96 to rotate upward about the axis of the support shaft 103. In addition, the rotation is regulated by the contact of the brake arm 96 with the buffer member 98.

The urging force of the coil spring 97, that is, the braking force can be adjusted by loosening the lock nut 106 and adjusting the vertical position of the engaging bolt 105. Brake roller 9
Reference numeral 9 denotes a crankshaft which is formed of rubber or the like, is positioned above the brake arm 96 and is rotatably mounted on the first cam 88 via a pivot 107 so as to be rotatable around the left and right axes.
And are rotated in the A direction.

At an intermediate portion in the front-rear direction on the upper surface side of the brake arm 96, there is formed an engagement recess 100 which is recessed from above and engages the brake roller 99 from above.
The bottom of the concave portion 100 coincides with the outer peripheral end locus B of the rotational locus of the brake roller 99.
9 is projected radially inward from the outer peripheral end locus B of the
0 in the rotation direction A of the brake roller 99 is the clutch 3
8 is a rotation restricting portion 100a for surely stopping the rotation of the crankshaft 71 when the clutch 8 is disengaged. The rear side of the recess 100 in the rotation direction A of the brake roller 99 prevents the reverse rotation of the brake roller 99 when the clutch 38 is disengaged. A reverse rotation preventing portion 100b for preventing the rotation is provided.

In the above configuration, the brake roller 99 rotates together with the crankshaft 71 in the direction A, and after the seedlings are planted, when the planted body 61 rises and comes to a position just before a predetermined stop position, the brake roller 99 brakes. The roller 99 is the brake arm 9
6 is located before the reverse rotation preventing portion 100b. When the clutch 38 is demagnetized and the power to the transplanting operation unit 50 is cut off, the cam 8 is moved by the inertia of each operation unit of the transplanting operation unit 50.
5 rotates slightly, and the brake roller 99 is rotated by the reverse rotation prevention unit 1.
00b, the brake arm 96 is pushed down against the urging force of the spring 97, and the movement of the transplant cylinder 61 is stopped in a state where the brake roller 99 is fitted in the engagement concave portion 100 (see FIG. 3).

In this state, the brake roller 99 does not have a force to overcome the rotation restricting portion 100a and the reverse rotation preventing portion 100b against the urging force of the spring 97.
It does not rotate in the direction A and the opposite direction. Thereby, the transplantation cylinder 61 can be stopped at a fixed position in the middle of the trajectory, and the operation stability is improved. In the above-described configuration, the plant body 6 after the clutch 38 is disconnected in a normal operation.
1. The braking force of the braking device 102 is set so that the planted body 61 stops at a predetermined stop position in consideration of the inertia forces of the swing link mechanism 67 and the power transmission mechanism. When the number changes, the inertia force of each operation unit of the transplanting work unit 50 also changes, and the braking force after the setting of the braking device 102 is constant. There is a possibility that the plant may stop before the engagement recess 100 or go over the engagement recess 100, and the planted body 61 may not stop at a predetermined stop position. If the planted body 61 does not stop at a predetermined stop position, the supply of seedlings to the planted body 61 may not be able to be performed smoothly, and if the stop position of the planted body 61 varies, the interval between the plants will be constant. No.

Therefore, in order to accurately stop the plant 61 at a predetermined position, it is necessary to consider the fluctuation of the rotation speed of the engine 17. Hereinafter, FIG.
This will be described with reference to the flowchart of FIG. In FIG. 2, when the planting clutch switch and the main clutch switch are turned on, the electromagnetic clutch 38 is turned on, and the transplanting operation is started. The planting clutch switch is turned on / off by the on / off operation of the planting clutch lever, and the main clutch switch is turned on / off by the on / off operation of the main clutch lever for turning on / off the clutch gear 34.

While the electromagnetic clutch 38 is on, the number of pulses emitted from the rotation sensor 45 is counted for a predetermined time T. Next, it is determined whether the upper limit detection sensor 101 is on or off. If the upper limit detection sensor 101 is off, the electromagnetic clutch 38 is kept on. If the upper limit detection sensor 101 is on, the process proceeds to the next step, a delay time is set, and the electromagnetic clutch 38 is kept on until the delay time elapses. , The electromagnetic clutch 38 is turned off.

The delay time is set stepwise according to the number of pulses counted in step A. In the case of the maximum number of engine revolutions predicted (or actually measured) during the transplantation operation, The delay time is set to 0,
The delay time is set to increase stepwise as the number of pulses counted with respect to the maximum number of pulses decreases. In addition, the delay time is determined in consideration of the inertia force of the planting body 61, the swing link mechanism 67, and the power transmission mechanism after the clutch 38 is disconnected, and the braking force of the braking device 102.
The planting body 61 is set in consideration of stopping at a predetermined position.

As described above, the timing at which the electromagnetic clutch 38 is disconnected is changed in consideration of the rotational speed of the engine 17, that is, the inertia of the planting body 61, the swing link mechanism 67, and the power transmission mechanism after the electromagnetic clutch 38 has been disconnected. Thereby, regardless of the presence or absence of the braking device 102, the implant 61 can be accurately stopped at a predetermined position. When the main clutch switch is turned off while the electromagnetic clutch 38 is on, the electromagnetic clutch 38 is also turned off. When the planting clutch switch is turned off, the upper limit detection sensor 101 is turned on and then the electromagnetic clutch 38 is turned off. Even if the planting clutch lever is turned off, the planted body 61
The transplant working unit 50 is operated until the is at a predetermined stop position.

After the electromagnetic clutch 38 is disconnected, it is determined whether the vehicle speed switch is off. The vehicle speed switch is turned off when the transmission 35 is in the first forward speed, and is turned on when the transmission 35 is in the second forward speed. When the vehicle speed switch is off, the number of input pulses (A) can be set in 14 steps at a 4-pulse pitch from 0 to 52 pulses by a dial-type inter-cell adjustment switch, and the rotation pulse sensor 45 is set based on the set number of pulses (A). The electromagnetic clutch 38 is maintained in the disconnected state until the value obtained by subtracting the number of input pulses emanating from becomes zero, and the electromagnetic clutch 38 is connected when the value becomes zero.

When the vehicle speed switch is ON, the number of input pulses (B) can be set in 14 steps at a 3-pulse pitch from 0 to 39 pulses by the inter-cell adjustment switch. The electromagnetic clutch 38 is maintained in the disconnected state until the value obtained by subtracting the number of input pulses emanating from becomes zero, and the electromagnetic clutch 38 is connected when the value becomes zero.

By adjusting the disconnection time of the electromagnetic clutch 38 as described above, it is possible to obtain a desired strain. FIG. 10 shows another embodiment, in which a brake roller 99 is pivotally supported by a rotating arm 108 fixed to a crankshaft 71, and the other configuration is the same as that of the above embodiment. I have.

In the above embodiment, the reverse rotation preventing portion 100b may be shaped as shown by a virtual line C in FIG. In the above-described embodiment, the present invention is applied to a walking type transplanter, but may be applied to a riding type transplanter. In addition,
In the above configuration, the detector 101 does not need to detect the upper limit of the planted body 61, but may detect the front of the plant 61. The time from the detection of the implant 61 by the detector 101 to the disconnection of the electromagnetic clutch 38 (disconnection time of the electromagnetic clutch) is the reference engine speed (or the number of pulses of a predetermined time generated from the rotation sensor K). ) And the electromagnetic clutch disengagement time are determined, and the reference engine speed is compared with the detected engine speed. If the detected engine speed is larger than the reference engine speed, the reference engine speed is determined. When the detected engine speed is smaller than the reference engine speed, the electromagnetic clutch 38 is disconnected in a shorter time than the reference electromagnetic clutch disconnection time, which is longer than the reference electromagnetic clutch disconnection time. Control may be performed such that the electromagnetic clutch 38 is disengaged in time. Further, the time from the detection of the implant 61 by the detector 101 to the disconnection of the electromagnetic clutch 38 may not be stepwise but may be proportional.

[0050]

According to the present invention, the timing for disengaging the clutch 38 after the position of the implant 61 is detected by the detector 101 is adjusted according to the rotation speed of the prime mover 17. Thereby, the plant body 61 can be accurately stopped at a predetermined position.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a power transmission system of a traveling system and a PTO system.

FIG. 2 is a flowchart.

FIG. 3 is a side view of the braking device according to the present invention.

FIG. 4 is a plan view of a main part.

FIG. 5 is a side view showing a main part of the multi-film punching device.

FIG. 6 is a side view of the multi-film punching device, showing a state in which the punching means has moved downward.

FIG. 7 is an overall schematic side view of a multi-film punching device and a planting device.

FIG. 8 is a plan view of the same.

FIG. 9 is an overall side view of the transplanter.

FIG. 10 is a side view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Running body 17 Engine (motor) 38 Electromagnetic clutch 61 Planting body (planting body) 101 Rotation pulse sensor (detector) K Rotation sensor

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-113625 (JP, A) JP-A-8-308327 (JP, A) JP-A-9-9974 (JP, A) JP-A-8-108 214638 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01C 11/00-11/02 303

Claims (1)

(57) [Claims] A traveling body (12) is provided with an implant (61) driven up and down by the power of a prime mover (17), and a power transmission system from the prime mover (17) to the implant (61) is provided. A clutch (38) for connecting and disconnecting power transmission is interposed, and the planting body (6
1) detects that it has reached a predetermined position on the trajectory, and detects a detector (10) for temporarily disengaging the clutch (38).
In the implanter stopping device of the transplanter provided with 1), a rotation sensor (K) for detecting the number of rotations of the prime mover (17) is provided, and the implanter (61) is detected by the detector (101).
A timing for disconnecting the clutch (38) after the detection of the rotational speed of the motor (17) is adjusted in accordance with the rotation speed of the motor (17).