JPS6356209A - Transmission apparatus of transplanter - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a transmission device for a transplanter.

(Prior Art) Conventionally, there has been a transmission device for a transplanter, which is typically disclosed in Japanese Patent Publication No. 57-56613. In this conventional device, a clutch pin and a clutch cam are provided on the drive shaft of the transplanting device, and when the clutch pin is brought into contact with the clutch cam, the clutch cam escapes in the axial direction against the spring, and the clutch is held at a fixed position. The device is configured so that the transplant device stops at a fixed position when the device comes off, and if the drive shaft is unexpectedly rotated in the opposite direction due to vibrations on the device side or the gravity of the device while it is in this stopped state, the clutch In order to prevent an unexpected situation in which the transfer tool operates to the original clutch disengaged state when the clutch is engaged, a flange is provided on the clutch cam to maintain this state once the clutch is disengaged. The clutch is configured to prevent the clutch from returning to the engaged state due to abutment between the pin and the collar.

(Problem to be Solved by the Invention) The conventional technology is safe because once the clutch is disengaged, it will not engage even if the drive shaft is reversed unless the clutch is engaged again. If the clutch disengagement position is set so that the tool stops at a certain position during the lifting process, the vibration of the machine will cause the transplanter to gradually move downward until it finally touches the ground. There were problems in that the transplant tool could be damaged if it came into contact with it, or it could leave scratch marks on the ground.

(Means for Solving the Problems) In order to solve the above problems, the present invention has the following configuration.

That is, a clutch pin 35 that can be moved arbitrarily in the axial direction and a spring 3 that moves the clutch toward the entry side are attached to the drive shaft 26 in the transmission mechanism that transmits the transplanting device B that moves up and down to transplant seedlings.
A clutch cam 31 is provided, which is configured to disengage the clutch at a fixed position in the circumferential direction of the rotation when the clutch pin 35 comes into contact with the clutch cam 31, and supports the drive shaft 26 and the drive shaft 26. The drive shaft 26 is connected between the transmission case 6 side and the implantation device i! A transmission device for a transplanter is provided with a one-way rotation mechanism 34 that allows rotation only on the side that normally transmits rotation.

(Operation and effect of the invention) According to the invention, - once the clutch is disengaged.

The one-way rotation mechanism prevents the drive shaft from rotating in the reverse direction, where the clutch is unexpectedly engaged, preventing the repeated engagement and disengagement of the clutch, which is the case with conventional technology, resulting in safety. In addition, even if the transplanter is stopped during the ascending process, the situation where the transplanter moves downward due to vibration or its own weight and touches the ground can be eliminated, which can prevent the transplanter from being damaged or leaving marks on the ground. It is possible to prevent situations that would leave behind.

(Example) A vegetable transplanter which is an example of the present invention will be described in detail based on the drawings.

Reference numeral 1 designates a transmission case, which has axle transmission cases 2 facing downward on both left and right sides, and a transmission case 3 facing rearward and upward in the middle part from the left side.

Reference numeral 4 denotes an engine, which is directly connected to the front side of the transmission case 1.

5.5 indicates wheels.

Reference numeral 6 denotes a transplanted transmission case, the base of which is fixed to the outside of the distal end of the transmission case 3, and the distal end thereof extends rearward.

Reference numeral 7 denotes a handle support rod, the base of which is attached to the right side of the transmission case 1, and the tip thereof extends rearward and upward.

A reinforcing rod 8 connects the transplanted transmission case 6 and the handle support rod 7 to each other.

Reference numeral 9 denotes a lead cam shaft, which is inserted into the proximal end or the distal end of the transmission case 3 to receive transmission rotation, and whose distal end is connected to a support rod 10 integrally attached to the reinforcing rod 8 via a metal fitting 11. It is rotatably supported by an attached metal 12.

Reference numeral 13 denotes a seedling supply stand, which has a structure in which a seedling transfer belt 14 is provided so as to be wrapped around and stretched in the front and back direction around the hollow space of the frame formed by the left and right standing frames and the front and rear bottom cutouts. There is.
15 is a belt winding roll.

Note that the rear belt winding roll 15 is connected to the ratchet mechanism 1.
6, and drive levers 17 are provided on both the left and right sides.

A rotor 18 is fixed to a shaft 19 that is integrally provided with the lead cam shaft 9 and protrudes outward from the left and right.

A lead metal 20 is inserted into the lead cam shaft 9 and equipped with a lead claw that engages with a lead groove of the lead cam shaft 9.
It is attached to the rear bottom plate.

Then, the lead metal 2 is rotated by the rotation of the lead cam shaft 9.
0, the seedling supply table 13 is reciprocated laterally to the left and right, and when it reaches the lateral end, the drive lever 17 is engaged with the rotor 18 and rotated, so that the belt winding roll 15 is rotated via the ratchet mechanism 16. It is set in.

21 is a seedling receiving frame, which is located at the rear end side of the seedling supply table 13;
It is attached to the transplant transmission case 6 and the handle support rod 7 via metal fittings 22, and a seedling outlet 23 is provided at the left and right center portions.

24a and 24b indicate support rails of the seedling supply table 13.

Reference numeral 25 denotes a loop handle, the base of which is fixed to the rear end of the transplanted transmission case 6 and the handle support rod 7.

The transmission mechanism inside the base side of the transmission case 6 is as shown in FIG. 3, and includes a drive shaft 26 rotatably received in the transmission case 6.
A sprocket 27 that transmits power to the transplant device side is wedge-attached to the sprocket 27.

Reference numeral 28 denotes a drive clutch body, which is attached to the drive shaft 26 so as to freely rotate.
9a and 29b are integrally provided on the base side of the lead cam shaft 9, and are freely rotatable and are axially rotated at an angle relative to the cylindrical shaft driven by the chino and sprocket from the engine side.
Gears 30a and 30b are splined so as to be movable and rotate integrally with the cylindrical shaft, and are selectively engaged with each other so as to be driven and rotated. 28a indicates a clutch pawl of the drive clutch body 28.

Reference numeral 31 denotes a clutch cam, which is wedged so as to be movable in the axial direction of the drive shaft 26 and rotated integrally with the shaft, and has a cam surface 31a inclined in the axial direction on its rotating peripheral surface. A clutch pawl 31b is provided on the side surface of the drive clutch body 28. Then, this clutch cam 31 is connected to the spring 32.
The clutch pawl 28 is pressed toward the drive clutch body 28 by
a and the clutch pawl 31b are configured to engage in normal conditions. The lead camshaft 9 is connected to the gear 3 from the drive shaft 26.
3a and 33b.

Further, the drive shaft 26 and the bearing portion of the transmission case 6 are configured with a roll pin 34a and a groove 34b into which the drive shaft 26 is fitted, so that the drive shaft 26 is allowed to rotate only in one direction in which the transplant device is operated. A normal one-way rotation mechanism 34 (one-way clutch) is provided.

Reference numeral 35 denotes a clutch pin, which is slidably attached to the transmission case 6, and is provided so that the pin 35 can be arbitrarily switched between a state in which it contacts the cam surface 31a of the clutch cam 31 and a state in which it disengages. When the clutch cam 31 comes into contact with the clutch cam 31, the clutch cam 31 escapes in the axial direction against the spring 32, and the clutch is disengaged at a certain position in the rotational circumferential direction.

Reference numeral 36 denotes a transmission shaft, which is rotatably mounted on a bearing inside the distal end side of the transplanted transmission case 6. This transmission shaft 36 has a sprocket 38, a gear 39, and a gear that receives power from the engine 4 side via a chino 37. 40 is provided so as to be rotated integrally with the shaft.

Reference numeral 41 denotes an outer shaft, which is rotatably supported by the transplanted transmission case 6, and a gear 42 that meshes with the gear 40 is wedged on the outer shaft 41.

Reference numeral 44 denotes a shaft inserted into the mantle shaft 41, and in this example, it is rotatably supported by the inner wall of one side of the transplanted transmission case 6.
The other end is provided outside the transplanted transmission case 6 so as to protrude beyond the mantle shaft 41.

A gear 44 that meshes with the gear 39 is provided on this shaft 43 so as to rotate integrally with the shaft.

Reference numeral 45 denotes a first rotating case, the inside of which is located on the base side of the shaft 43 is penetrated from the side surface, and the outer surface of the case is attached to the shaft 43 via a metal 46 that is attached with a pin.

A gear 47 is provided integrally with the mantle shaft 41 and is disposed within the first rotating case 45. Reference numeral 48 denotes a fixed shaft that passes through the inside of the first rotary case 45 on the front end side and is fixed to the first rotary case 45 by a metal 49 and a pin 50 on its side surface. Reference numeral 51 denotes a cylindrical shaft, which is inserted through the fixed shaft 48 and has the gear 47 at its base end.
A gear 52 that meshes with is integrally provided.

Reference numeral 53 denotes a second rotating case, and the outer side of the base side is the cylinder shaft 51.
It is fixed by a pin 54 and a metal 55. Note that the fixed shaft 48 is inserted into the second rotating case 53.

Reference numeral 56 indicates a gear fixed to the fixed shaft 48 inside the second rotating case 53. Reference numeral 57 indicates a counter gear, and 58 indicates a rotation gear of a shaft 59 for attaching a transplant tool.The shaft 59 protrudes outside the distal end side of the second rotating case 53, and a transplant tool 60 is attached to this. .

The transplant device 60 of the transplant device B has a box-shaped transplant device body with a hollow interior, and a fixed transplant claw 61a and a movable transplant claw 62b.
is attached, and an operating mechanism for the movable transplant claw 62b is provided inside the transplant device main body.

The case 60a of the transplant device 60 is attached to the shaft 59 by a metal fitting 63. It is fixed by a key 64 and a knot turbine 65.

The transplant movable claw 62b is attached to a vertical shaft 66 rotatably attached to the case 60a,
The distance between the left and right sides of the transplant fixing claw 61a, which is fixed to the case 60a with bolts, is provided so that it can be expanded or contracted.

Reference numeral 67 denotes an opening/closing cam, and the transplant tool attachment is provided integrally with a mantle shaft 68 that covers the shaft 59, and this mantle shaft 68 is connected to the second mantle shaft 68.
It is integrally attached to the rotating case 53.

69 is a cam floor, which is fixed to the shaft 66 and has a spring 7o.
The opening/closing cam 67 is pressed into contact with the opening/closing cam 67, and the shaft 66 is rotated by the rotation of the cam 67.

The rotation speed of the second rotation case 53 is set to be exactly twice the rotation speed of the first rotation case 45, and when both rotation cases 45 and 53 are fully extended in a straight line, the circumferential rotation case Both 45 and 53 are facing down the road, WJ
The rotation cases 45 and 53 of # are configured to face in the front-rear direction when they are not extended linearly but bent.

Further, the trajectory P drawn by the tip of the transplanted nail of the transplant tool 60 is configured in a closed loop shape that is narrow in the front-rear direction and long in the vertical direction.

The movable transplant claw 61b operates by rotating against the spring 70 toward the fixed transplant claw 61a when the transplant claw intervenes in the seedling take-out port 23 of the seedling receiving frame 21 from above and takes out the seedling. Thereafter, the cam 67 is shaped so that it reaches the lower end in that state and opens when it plunges into the soil surface.

According to the transmission mechanism of the transplant device 60 in the above example, the first rotating case 45 is rotated clockwise by the shaft 43, the second rotating case 53 is rotated counterclockwise by the cylindrical shaft 51, and the transplant device 60 is The gear 58 is subjected to planetary rotation by the sun gear 56 which is substantially fixed to the first rotating ace 45, and the gear 58 is shifted relative to the second rotating case 53 while maintaining substantially the same attitude when viewed from the side. For this reason, the first
Since the rotating case 45 and the second rotating case 53 are gear-transmitted in opposite directions, rattling caused by backlash due to gear transmission is less likely to occur, and seedling division by the transplanting tool 60 can be performed accurately.

Next, the power transmission configuration of another example of the implant 60 will be explained with reference to FIG. 6.

To explain the difference from the example shown in FIG. A gear 52b is provided, and a shaft 48a integrated with the planetary gear 52b rotates the second rotating case 5.
3 is provided to be rotated, and a cylindrical shaft 51a inserted through this shaft 48a is fixed to the first rotating case 45. A gear 56a as a sun gear is provided on this cylindrical shaft 51a. A planetary gear 58a is configured to be transmitted through a counter gear 57a, and a transplant tool 60 is attached to a shaft 59, which is integrated with this gear 58a.
It is configured to be installed.

Also in this embodiment, the first rotating case 45 is rotated clockwise, and the second rotating case 53 is rotated counterclockwise.

Next, to explain the operation of the above example, after setting the wheels 5.5 of the transplanter so as to straddle the transplanting ridges in the field,
After placing mat-like seedlings on top or pot-like seedlings A grown in a paper seedling nursery with pot containers arranged at predetermined intervals vertically and horizontally, the engine 4 rotates each part. When the wheels are rotated by transmission, the aircraft will be propelled by the rotation of the wheels 5.5.

The seedling supply table 13 is reciprocated in the left-right direction by the rotation of the lead cam shaft 9 via the lead metal 20. Therefore, the artist located on the rear end side is moved from side to side while being received by the seedling receiving frame 21, and the seedlings are delivered to the seedling outlet 23.

On the other hand, a cylindrical shaft inserted into the spline shaft 9 from the engine side is transmitted by a chain, and transmission gears 30a and 30b splined to this cylindrical shaft receive transmission rotation, and the gears selectively meshed with the transmission gears 30a and 30b are splined to the cylindrical shaft. When the clutch body 28 is rotated by 29a or 29b and the clutch pin 35 is pulled out, the clutch cam 3
When the first clutch pawl 31b is engaged with the clutch pawl 28a, the drive shaft 26 receives power from the clutch cam 31 by the key and is rotated. Therefore, sprocket 2
7 is transmitted, and the lead camshaft 9 is also transmitted via the gears 33a and 33b.

Also, push in the clutch pin 35 and clutch cam 31
When the tip end side surface of the pin 35 is brought into contact with the cam surface 31a of
In response to the rotational force, this cam surface causes the clutch cam 31 itself to move in the axial direction against the spring 32, and the clutch pawl 28a
The clutch pawl 31b comes off and the clutch is disengaged.

At this time, the drive shaft 26 is simultaneously stopped at the stop position, the lateral movement of the seedling supply table 13 is stopped, and the transmission to the transplanting device side is also stopped. This drive shaft 26 is connected to the one-way rotation mechanism 3
4 is provided between the clutch and the transmission case 6, so it will not rotate in the opposite direction and will stop exactly at the position where the clutch is disengaged.

When the transmission shaft 36 is transmitted from the sprocket 27 via the chino and sprocket, the shaft 43 is transmitted and rotated by the gear 39 and the gear 44.

The first rotating case 45 is rotated clockwise in FIG. 1 by this shaft 43.

The mantle shaft 41 is transmitted and rotated by a gear 40 and a gear 42. A gear 47 fixed to the mantle shaft 41 is rotated at high speed within a first rotating case 45, and a gear 52 that meshes with this gear 47 rotates the mantle shaft 41. 53 counterclockwise 2
It will rotate at twice the speed. The first rotating case 45 fixed to the mantle shaft 41 is rotated. On the other hand, a shaft 59 for attaching the transplant device is rotated from a gear 56 attached to a shaft 48 fixed to the first rotation case 45 via a counter gear 57 and a gear 58, and a transplant device 60 fixed to this shaft 59 is rotated.
rotates at the same speed in the opposite direction to the rotational direction of the second rotating case 53, and the implant 60 moves up and down without changing its posture.

Then, the tip of the transplant nail 61 attached to the transplant tool 60 moves drawing a closed-loop transplant locus P.

In the case of the other example shown in FIG.
The operation of 0 will be the same.

The transplant claw 61 that draws such a transplant trajectory P intervenes in the seedling take-out port 23 of the seedling receiving frame 21 from above, and the fixed transplant claw 61
When a seedling is caught between the movable transplant claw 61b and the cam 6
7 and the cam floor 69 actuate the movable transplant claws 61b to firmly hold the seedling A. Then, in this state, it moves downward, and the transplanted claw penetrates into the soil surface above the ridge, where the cam 67
The movable transplant claw 61b opens outward, and the seedling A is released and transplanted.

Subsequently, the first rotating case 45 rotates forward and upward, the second rotating case 53 rotates backward and upward, and the transplant device 60 is pulled upward.

During this pulling up, when the operator operates the clutch pin 35 with the clutch operating lever and pushes it in, the clutch is disengaged as described above and the upward movement of the transplant tool 60 is stopped at that point.

At this time, the first rotating case 45 and the second rotating case 53
The shafts 43, 48, etc. try to reverse rotation due to their own weight, but since the aforementioned drive shaft 26 is not allowed to reverse rotation due to the one-way rotation mechanism 34, they stop exactly at that position, and the clutch is unexpectedly engaged, causing the transplant. This prevents the device from repeatedly turning on and off the clutch unexpectedly.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Figs. FIG. 6 is a sectional view of another example of a transmission structure, and FIG. 7 is a sectional view of the main parts. Symbols in the figure include 6, a transmission case, 26, a drive shaft, 31, a clutch cam, 32, a spring, 34, a one-way rotation mechanism, 35, a clutch pin, and B, a porting device. Representative Masataka Iseki Figure 6 Figure 7

Claims (1)

[Claims] A clutch pin 35 and a clutch that can be moved in the axial direction at will are urged by a spring 32 toward the entry side on a drive shaft 26 in a transmission mechanism that transmits a transplanting device B that moves up and down to transplant seedlings. A clutch cam 31 is provided so that the clutch is disengaged at a fixed position in the rotational circumferential direction when the clutch pin 35 comes into contact with the drive shaft 26 and the transmission case 6 side that supports the drive shaft 26. between the drive shaft 2
Reference numeral 6 denotes a transmission device for a transplanter, which is provided with a one-way rotation mechanism 34 that allows rotation of the transplant device B only on the side that normally transmits the rotation.