JP2013141429A - Power transmission device of seeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission device of a seeder, which has a clutch for swinging a clutch arm by the operation of a lever to engage or disengage a transmission chain with a driving side sprocket, and prevents the sag of the transmission chain, when the clutch is engaged or disengaged.SOLUTION: The power transmission device of the seeder is characterized by arranging a tension roller 131 disposed on the loosing side portion of the transmission chain 102 in a state capable of being moved in the direction for approaching or separating from the outer peripheral side of the transmission chain 102, energizing to press the outer peripheral side of the transmission chain 102 with a spring 136, contacting a tension roller 132 on the tension side of the transmission chain 102 with the inner peripheral side of the transmission chain 102, and immobilizing the tension roller 132 to the transmission chain 102.

Description

  The present invention relates to a power transmission device that supplies power to a seedling box to be fed, seeds the seedling box to be fed, seeds the seedling box, and feeds the soil.

There exists a thing of patent document 1 as a power transmission device which transmits motive power to the feeding part of the seeder which supplies floor soil to a seedling box conveyed, seeds, and supplies covering soil.
The power transmission device described in the cited document 1 transmits power to a seed feeding portion (seeding roll), and is constituted by a chain transmission mechanism, and is driven from a drive shaft that is rotationally driven by power from an electric motor. Power is transmitted to the sowing roll.

The seeding roll rotates to transfer seeds from a seed tank disposed above the seeding roll to the lower part of the seeding roll and drop seeds on the seedling box that passes under the seeding roll for seeding.
In the power transmission device, a claw clutch (meshing clutch) is employed to connect and disconnect the power from the drive shaft to the seeding roll.

Japanese Patent No. 3963891

Since the conventional power transmission device employs a pawl clutch, there is a problem that the clutch connecting / disconnecting operation is heavy.
Therefore, the present applicant has tension rollers on the tension side portion and the loose side portion of the transmission chain wound around the driving side sprocket and the driven side sprocket, respectively, on the tip side of the clutch arm that swings by lever operation. A power transmission device provided with a clutch provided with a clutch roller that comes into contact with the inner peripheral side of the slack side portion of the transmission chain was considered.

  In this power transmission device, the tension roller of the tension side portion and the loose side portion of the transmission chain are movable in the direction approaching and separating from the outer peripheral side of the transmission chain, and the outer peripheral side of the transmission chain by a spring. The clutch oscillates the clutch arm to disengage and engage the drive chain with the drive side sprocket to transmit power from the drive side sprocket to the driven side sprocket. Connect and disconnect.

As a result, the clutch connecting / disconnecting operation is lightened. However, in the power transmission device, when the clutch is engaged and disengaged, sagging occurs on the tension side of the transmission chain, which causes pulsation (sucking) on the sowing roll, sowing. There was a problem that the accuracy was lost.
In view of the above problems, the present invention is a power transmission device including a clutch that swings a clutch arm by lever operation and separates and meshes a transmission chain with a drive-side sprocket. It is an object of the present invention to provide a power transmission device for a seeder that prevents the transmission chain from sagging.

The technical means taken by the present invention to solve the technical problems are characterized by the following points.
The invention according to claim 1 is a power transmission device that transmits power to a feeding portion of a seeding machine that supplies floor soil, seeds, and supplies covering soil to a seedling box to be transported,
A transmission chain wound around these sprockets is provided to transmit power from the fixed drive side sprocket to the driven side sprocket on the rotationally driven drive shaft, and tension rollers are provided on the tension side and loose side of the transmission chain, respectively. ,
A clutch roller that comes into contact with the inner peripheral side of the slack side portion of the transmission chain is provided on the distal end side of the clutch arm that swings by lever operation, and the transmission chain is moved against the drive side sprocket by swinging the clutch arm. A clutch that connects and disconnects the power transmission by separating and engaging the
The tension roller on the loose side is movable in a direction approaching and separating from the outer peripheral side of the transmission chain and is urged by a spring so as to press the outer peripheral side of the transmission chain. It is characterized by being in contact with the inner peripheral side and immovable with respect to the transmission chain.

  The invention according to claim 2 is characterized in that the tension-side tension roller is disposed close to the drive-side sprocket, and the center of oscillation of the clutch arm is concentric with the rotation axis of the tension-side tension roller. .

  According to the present invention, since the clutch that swings the clutch arm by lever operation and separates and meshes the transmission chain with the drive side sprocket is adopted, the clutch connecting / disconnecting operation is light. Further, since the tension roller on the tension side of the transmission chain does not move, the tension side of the transmission chain does not sag when the clutch is engaged, and pulsation does not occur in the feeding portion.

It is the whole sowing machine side view. It is a side view of the principal part of a seeder. It is a top view of a conveyance conveyor. It is a top view of a roller conveyance mechanism. It is a top view of a belt conveyance mechanism. It is a side view of the arrangement | positioning part of a floor soil supply apparatus, a soil leveling apparatus, and a corner press. It is a side schematic diagram of a medicine pump arrangement part. It is a plane partial sectional view of a medicine pump arrangement part. It is a schematic side view of a seeding apparatus. It is a back surface expanded sectional view of a seeding device. It is a side view of a soil covering supply apparatus. It is a back sectional view of a soil covering supply device. It is a left side schematic diagram of a seeding device. It is a side view of the power transmission device in a power transmission state. It is a side view of the power transmission device in a power cut state. It is a plane sectional view of the lower part of a power transmission device. It is a rear view of a guide plate. It is a right side view of a seeding device. It is a right side expanded side view of a seeding apparatus. It is plane sectional drawing of the right side of a seeding apparatus. It is rear surface sectional drawing of the seeding apparatus which showed the scraper. It is a side view of a scraper attachment part. It is a decomposition | disassembly side view of the right side of a seeder apparatus. (A) is a plane exploded view which shows the state which removed the transmission gear etc. from the sowing roll, (b) is a plane sectional view of the left side support part of a sowing roll.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a seedling that automatically supplies floor soil, irrigation and application, fertilization, sowing, and soil covering to the seedling box 2 while transporting the seedling box 2 forward (in the direction of the seedling box transport). 1 shows a seeding machine 1 for use.
This seeding machine 1 can stock several tens of vertical conveyor conveyors 3 arranged in the front-rear direction, auxiliary frames 4 and 5 and seedling boxes 2 in the vertical direction, and a seedling box from the lower end side. The seedling box supply device 6 that can feed the two pieces forward one by one, the soil supply device 7 that supplies floor soil to the seedling box 2 (referred to as a floor soil supply device), and the bed soil supplied to the seedling box 2 The soil leveling device 8 for leveling the upper surface of the soil, the corner press 9 for leveling the raised portion on the front end side of the seedling box 2 on the upper surface of the floor soil, the drug pump 10 for sending the chemical solution to the irrigation device 11, and the floor soil are supplied. An irrigation device 11 for irrigating the cultivated seedling box 2 with a chemical solution, a fertilizer application device 12 for fertilizing the irrigated seedling box 2, a seeding device 13 for sowing the fertilized seedling box 2, and a sown seedling box Soil supply device 14 for supplying soil covering 2 ( And a called soil feeder).

The seedling box supply device 6 is provided on the auxiliary frame 5 on the rear side, and the seedling box 2 fed out from the seedling box supply device 6 is sent to the transport conveyor 3 by a feeding conveyor comprising a belt conveyor.
The said conveyor 3 mounts the seedling box 2 fed out from the seedling box supply device 6 and conveys it forward to the front auxiliary frame 4. As shown in FIG. 2, a floor soil supply device 7, a soil leveling device 8, a corner press 9, a irrigation device 11, a fertilizer device 12, a seeding device 13, and a covering soil supply device 14 are provided on the transport conveyor 3. It arrange | positions in order toward the front A from the rear part.

The drug pump 10 is disposed between the corner press 9 and the irrigation device 11 and attached to the side surface (left side surface) of the transport conveyor 3.
As shown in FIGS. 2 to 5, the transfer conveyor 3 is provided on the rear side of the conveyor frame 16, a conveyor frame 16 that is long in the front-rear direction, front and rear support legs 17 that support the conveyor frame 16, and raises seedlings. A roller transport mechanism 18 for roller transporting the box 2 and a belt transport mechanism 19 provided on the front side of the conveyor frame 16 for belt transporting the seedling box 2 are provided.

  The conveyor frame 16 is formed by connecting left and right frame members 21 arranged at intervals in the left-right direction. In the present embodiment, the left and right frame members 21 are configured by channel members arranged so that the groove openings face outward in the left-right direction (the direction from the center in the left-right direction toward the left-right end), and between the left and right frame members 21. The left and right frame members 21 are connected to each other by a connecting member 22 or the like made up of arranged rods.

The roller transport mechanism 18 has a large number of rotating shafts 23a to 23h (eight in this embodiment) arranged in the front-rear direction between the left and right frame members 21, and can rotate integrally with each rotating shaft 23a to h. A transfer roller 24 (roller made of rubber) fixed to the shaft, and a transmission mechanism 25 that transmits power to each rotary shaft 23.
A pair of left and right frame members 21 are provided on the rotating shafts 23a to 23h, and the conveying roller 24 is provided in the left and right directions on the first and third rotating shafts 23g and 23e from the starting rotating shaft 23h. It is also provided in the center.

Each of the rotation shafts 23a to 23h has a horizontal axis, and is supported by the left and right frame members 21 so as to be rotatable around the axis. Further, one side (right side) in the left-right direction of each of the rotation shafts 23 a to 23 h protrudes outward in the left-right direction from the vertical wall 21 a of the frame member 21.
The transmission mechanism 25 is constituted by chain transmission means, and is provided across the rotating shafts 23a to 23h adjacent in the front-rear direction. Each transmission mechanism 25 includes a transmission-side sprocket 25A and a transmission-side sprocket 25B fixed to the rotary shafts 23a to 23h so as to be integrally rotatable, and a chain 25C wound around the sprockets 25A and 25B. The transmission-side sprocket 25 </ b> A and the driven-side sprocket 25 </ b> B are provided in a portion protruding to the right from the vertical wall 21 a of the frame member 21 of the rotating shaft 23.

  The belt conveyance mechanism 19 includes a belt drive shaft 26 on the start end side disposed in the vicinity of the front A of the rotation shaft 23a at the foremost end (terminal) of the roller conveyance mechanism 18, and can be integrally rotated on both the left and right sides of the belt drive shaft 26. A pair of left and right drive pulleys 27 provided, a terminal-side belt driven shaft 28 disposed on the terminal end side of the conveyor 3, and a pair of left and right driven gears provided integrally on both the left and right sides of the belt driven shaft 28. Between the pulley 29, a conveying belt 30 comprising a pair of left and right endless belts wound around a driving pulley 27 and a driven pulley 29 disposed on the same side in the left-right direction, and between the belt driving shaft 26 and the belt driven shaft 28 And a pair of left and right tension applying means 32 for applying tension to the left and right conveying belts 30.

The belt drive shaft 26 and the belt driven shaft 28 have a horizontal axis, and are supported between the left and right frame members 21 of the conveyor frame 16 so as to be rotatable about the axis. The belt drive shaft 26 is supported so as not to be movable in the front-rear direction, and the belt driven shaft 28 is supported so as to be movable within a predetermined range in the front-rear direction.
The drive pulley 27 and the driven pulley 29 are V pulleys and are arranged between the left and right frame members 21 of the conveyor frame 16. The conveyor belt 30 is composed of a V belt.

  The lower support member 31 is constructed between a left and right frame member 21 of the conveyor frame 16 and has a rod 31A having a left and right axis fixed to the frame member 21 and a left and right direction rotatably fitted on the rod 31A. And a cylindrical tube member 31B having a central axis. The lower support member 31 is disposed between the belt drive shaft 26 and the belt driven shaft 28 with a space in the front-rear direction, and is in contact with the lower surface of the upper portion of the transport belt 30. In the present embodiment, four support members 31 are provided.

The tension applying means 32 has a screw shaft supported so as to be able to be screwed back and forth in the front-rear direction with respect to a nut fixed on the frame member 21 side, and the belt driven shaft 28 is moved by screwing the screw shaft. The supporting bearing 33 is moved forward, thereby applying tension to the conveyor belt 30.
The drive source for driving the roller transport mechanism 18 and the belt transport mechanism 19 is constituted by an electric motor 34, which is provided at the rear portion of the seeding device 13 (see FIGS. 2 and 9).

As shown in FIGS. 9 and 10, the output shaft 34a of the electric motor 34 protrudes to the right from the seeding device 13, and the rotating shaft 23a at the foremost end of the roller transport mechanism 18 is disposed below the output shaft 34a. .
Power is transmitted from the output shaft 34a of the electric motor 34 to the rotary shaft 23a at the foremost end of the roller transport mechanism 18 by the transmission means 36 comprising a chain transmission mechanism, and the nursery box 2 on the transport roller 24 is transported forward A. As described above, the rotational power is sequentially transmitted from the rotation shaft 23a at the front end of the roller transport mechanism 18 to the rotation shafts 23b to 23h at the rear.

Further, the right side of the belt drive shaft 26 protrudes to the right from the vertical wall 21a of the frame member 21, and the portion that protrudes from the vertical wall 21a of the right frame member 21 of the belt drive shaft 26 has a transmission composed of a chain transmission mechanism. Rotational power is transmitted from the rotary shaft 23a at the foremost end of the roller transport mechanism 18 via the means 37, whereby the belt drive shaft 26 is rotationally driven around the axis.
The transmission means 37 that transmits power to the belt drive shaft 26 is slightly decelerated from the rotary shaft 23 at the foremost end of the roller transport mechanism 18 in order to match the transport speed of the belt transport mechanism 19 with the transport speed of the roller transport mechanism 18. The power is transmitted to the belt drive shaft 26.

  Further, in the seeder 1 of the present embodiment, the floor soil supply device 7, the soil leveling device 8, the drug pump 10, the seeding device 13, and the covering soil supply device 14 are driven by the electric motor 34 (drive source). Is done. The rotary shaft 23h at the rearmost end (starting end) of the roller transport mechanism 18 is a floor soil drive shaft that drives the floor soil supply device 7, and the second rotary shaft 23f from the rearmost end of the roller transport mechanism 18 is a soil leveling device. 8, the second rotary shaft 23c from the frontmost rotary shaft 23a of the roller transport mechanism 18 is the pump drive shaft for driving the drug pump 10, and the roller transport mechanism 18 The rotary shaft 23a at the front end is used as a seeding drive shaft for driving the seeding device 13, and the soil covering drive shaft 39 for driving the soil covering supply device 14 from the belt drive shaft 26 of the belt transport mechanism 19 via the transmission means 38 including a chain transmission mechanism. Power is transmitted to.

Further, power is transmitted from the rotating shaft 23 h at the rearmost end of the roller transport mechanism 18 to the feed conveyor that feeds the seedling box 2 fed from the seedling box supply device 6 to the transport conveyor 3.
A roller transport mechanism 18 is provided in the arrangement portion of the floor soil supply device 7, the soil leveling device 8, the corner press 9, the irrigation device 11 and the fertilizer application device 12. (In other words, the floor soil supply device 7, the soil leveling device 8, the corner press 9, the irrigation device 11, and the fertilizer application device 12 are arranged in the roller transport zone in which the roller transport mechanism 18 transports the seedling box 2).

In addition, a belt transport mechanism 19 is provided at a portion where the seeding device 13 and the soil covering supply device 14 are arranged. In the present embodiment, the seeding device 13 is disposed across the roller transport mechanism 18 and the belt transport mechanism 19, and the soil covering supply device 14 is disposed in the belt transport zone in which the seedling box 2 is transported by the belt transport mechanism 19.
As shown in FIG. 6, the floor soil supply device 7 includes a frame 41 (referred to as a floor soil frame) having a pair of left and right side plates 40 erected on the left and right frame members 21 of the conveyor 3, and the floor soil frame. A hopper fixed to the top of 41 and storing soil; a soil transport conveyor 43 positioned between the side plates 40 of the floor soil frame 41 and below the lower end opening of the hopper 42; It is mainly composed of a power transmission device 44 that transmits power from the floor soil drive shaft 23h to the feeding portion).

The earth transport conveyor 43 includes a start end roll 45, an end end roll 46, an earth feed belt 47 including endless belts wound around these rolls 45, 46, and a tension that applies tension to the earth feed belt 47. Providing means 48.
Power is transmitted from the floor soil drive shaft 23h to the end side roll 46 of the soil transport conveyor 43 via a power transmission device 44 comprising a belt transmission mechanism, and the soil in the hopper 42 received by the soil feed belt 47 is forwarded. The end side roll 46 is rotated so as to be transferred to A, and the floor soil is dropped and supplied from the end side of the soil transport conveyor 43 to the seedling box 2 that moves (passes) below the soil transport conveyor 43.

A soil discharge port 49 (within the hopper 42) on the soil feed belt 47 is provided at the lower front portion of the hopper 42, and the vertical position of the discharge port 49 can be adjusted. There is provided a gate member 50 that changes and adjusts the amount of soil discharged from the discharge port 49.
As shown in FIG. 6, the soil leveling device 8 includes a rotating brush 51 that leveles the upper surface of the floor soil, and a transmission case that houses a transmission mechanism that transmits rotational power from the soil leveling drive shaft 23 f to the rotating brush 51. 52 and a height adjusting means 53 for adjusting the height of the rotary brush 51.

The rotating brush 51 is supported by the transmission case 52 so as to be rotatable about the left and right axis.
The transmission case 52 is inclined forward, and the lower part is leveled and is pivotally supported around the axis of the drive shaft 23f so as to be swingable up and down.
The height adjusting means 53 biases the rotating brush 51 downward, a support plate 54 in which a large number of recesses 55 having different heights are formed, a support rod 56 that is selectively hooked on the recesses 55 of the support plate 54. And a spring (not shown).

The lower end side of the support rod 56 is fixed to a bearing 57 that rotatably supports the rotary brush 51, and the height of the rotary brush 51 can be adjusted stepwise by changing the support rod 56 to another recess 55. It is said that.
When the floor soil is leveled with the rotating brush 51, the floor soil is raised at the front and rear ends of the nursery box 2, and the raised portion on the front end side of the floor soil is leveled by the corner press 9.

As shown in FIG. 6, the corner press 9 includes left and right swing arms 58 pivotally supported on the left and right frame members 21 of the transport conveyor 3, and a flat member 59 attached and fixed to the swing arm 58. And a height setting means 60 for setting the height of the flat member 59.
Each of the left and right swing arms 58 is inclined forward, and a lower end thereof is pivotally supported by a bracket 61 attached and fixed to the frame member 21 so as to be rotatable about the left and right axes, and is swingable up and down.

The leveling member 59 is formed of a plate and is provided across the upper part of the left and right swing arm 58.
The height setting means 60 is provided on the left and right swing arms 58. The height setting means 60 includes a stay 62 fixed to the swing arm 58 and a bolt member 64 screwed into a nut 63 provided on the stay 62 and having a vertical axis.

  A handle 65 for rotating the bolt member 64 is provided at the upper end of the bolt member 64, and a contact member 66 formed of rubber or the like is provided at the lower end of the bolt member 64. The contact member 66 is conveyed. By contacting the upper surface of the frame material 21 of the conveyor 3, the downward swing of the swing arm 58 is restricted. Therefore, the height of the leveling member 59 is set by screwing and screwing the bolt member 64 with respect to the nut.

The swing arm 58 can swing upward, and a compression coil spring 67 is interposed between the handle 65 and the stay 62.
In this corner press 9, the leveling member 59 is inclined so as to shift to the front A as it goes downward, and the leveling member 59 is pressed to the front upper end side of the seedling box 2 that moves forward. As a result, the swing arm 58 swings upward and escapes, and when the front upper end of the seedling box 2 passes, the swing arm 58 swings downward and the leveling member 59 is lowered, and the lower end of the leveling member 59 On the side, the front edge side of the floor soil is leveled.

The irrigation device 11 is provided across the left and right frame members 21 of the conveyor 3 and has a water spray pipe 68 connected to a water supply via a hose or the like, and the floor soil of the seedling raising box 2 that moves below the water spray pipe 68. Water on top.
As shown in FIGS. 7 and 8, the drug pump 10 is fixed to the left side surface of a pump mounting base 71 that is detachably attached to the vertical wall 21 a of the left frame member 21 of the transport conveyor 3.

A nut 72 is welded and fixed to the inner surface side of the vertical wall 21 a of the frame member 21, and a bolt 73 that passes through the frame member 21 and the mounting portion 71 a of the pump mounting base 71 from the left and is screwed into the nut 72. The pump mounting base 71 is detachably attached to the frame member 21 from the outer side in the left-right direction.
The drug pump 10 has a left and right axial center and is fixed to the pump rotating shaft 74 so as to be integrally rotatable with a pump rotating shaft 74 that is rotatably attached to the pump mounting base 71 around the axis. A rotating body 76 that pivotally supports a plurality of rollers 75, a semicircular arc-shaped tube retainer 77 disposed on the outer peripheral side of the revolution trajectory of the roller 75, and a throttle tube disposed on the inner peripheral surface side of the tube retainer 77 78, and connecting tools 79A and 79B connected to the respective ends on both sides of the throttle tube 78.

On the pump mounting base 71, a drive side gear 81 that is fitted to the pump drive shaft 23c so as to be integrally rotatable, and a driven gear that is fixed to the pump rotary shaft 74 so as to be integrally rotatable and meshed with the drive side gear 81. A gear transmission means 83 including a side gear 82 is provided.
The upper connection tool 79A is connected to the chemical tank via a hose or the like, and the lower connection tool 79B is connected to the water spray pipe 68 of the irrigation apparatus 11 via the hose or the like.

One end (lower end) of the tube presser 77 is pivotally supported by the pump mounting base 71, and one end of a tension spring 84 is hung on the other end (upper end), and the tube presser 77 is urged toward the throttle tube 78 side. The other end of the tension spring 84 is pivotally supported by the lever 85.
The throttle tube 78 is made of a flexible material such as rubber or plastic.
The rotary body 76 is driven to rotate in the direction indicated by the arrow W by the pump drive shaft 23c. When the rotary body 76 rotates, the roller 75 revolves while squeezing so as to crush the throttle tube 78 and rolls on the inner peripheral side of the tube presser 77. . As a result, the chemical solution is sucked from the upper connection tool 79 </ b> A, discharged from the lower connection tool 79 </ b> B, and sent to the irrigation apparatus 11.

The chemical pump 10 is attached by fixing the pump mounting base 71 to the frame member 21 from the left side, and is easy to mount. Further, when the drug pump 10 is not used, the biasing force of the tension spring 84 can be released by rotating the lever 85. However, since the drug pump 10 is exposed to the outside, the operability of the lever 85 is also improved. Good.
The fertilizer application device 12 is provided with a feed roll 87 on a fertilization frame 86 erected on the left and right frame members 21 of the transport conveyor 3 and a fertilizer hopper 88 above the feed roll 87.

The feeding roll 87 is rotationally driven by an electric motor (not shown) provided on the fertilization frame 86, and drops and supplies the fertilizer in the fertilizer hopper 88 to the seedling box 2 passing below.
The fertilizer device 12 is attached as an option. When the fertilizer device 12 is not attached, the irrigation device 11 can be adjusted in the front-rear position so that the irrigation device 11 can be brought close to the seeding device 13. Has been.

  As shown in FIGS. 9 and 10, the seeding device 13 includes a frame 90 (referred to as a sowing frame) having left and right side plates 89 erected on each frame member 21 of the conveyor 3 and an upper portion between the left and right side plates 89. A seed tank 91 fixed to the seed tank 91, a seeding roll 92 (seed feeding portion) positioned below the seed tank 91, a rotating brush 93 positioned above the seeding roll 92, and a rear side of the seeding roll 92. It has a feeding guide member 94 and a scraper 95 positioned.

A seed discharge port 96 is formed in a lower opening shape at the lower end of the seed tank 91, and the seed discharged from the seed discharge port 96 is guided to the front upper part of the sowing roll 92 by the guide plate 97 and collected at the place. This place is a seed reservoir 98.
The sowing roll 92 has a lateral axis and is disposed between the left and right side plates 89 of the sowing frame 90. The sowing roll 92 has a roll main body 92A and a roll shaft 99 provided to be rotatable integrally with the axis of the roll main body 92A. The roll shaft 99 is rotatable about the left and right axis on the left and right side plate 89 side. (The left side of the roll shaft 99 is directly supported by the left side plate 89, and the right side of the roll shaft 99 is supported by the right side plate 89 via a support plate 152 described later).

A drive side sprocket 101 is provided on the left end side of the seeding drive shaft 23 a so as to be integrally rotatable. Power is transmitted from the drive side sprocket 101 to the driven side sprocket 103 via the transmission chain 102.
This driven-side sprocket 103 is fixedly attached to a first transmission gear 105 provided so as to be rotatable integrally with the transmission shaft 104, and power is transmitted from the driven-side sprocket 103 to the transmission shaft 104 via the first transmission gear 105. .

  The transmission shaft 104 is disposed above the rear portion of the sowing roll 92 and is supported between the side plates 89 so as to be rotatable about the left and right axis. A second transmission gear 106 is provided on the right end side of the transmission shaft 104 so as to be integrally rotatable. The second transmission gear 106 meshes with the second transmission gear 106 and is provided to the third transmission gear 107 provided for integral rotation on the roll shaft 99. By transmitting power from the transmission gear 106, the seeding roll 92 is rotationally driven in the direction indicated by the arrow X.

On the outer peripheral surface of the roll body 92A of the sowing roll 92, a sowing groove 108 in the roll axial direction is formed in the circumferential direction, and the sowing roll 92 rotates in the arrow X direction, sowing seeds in the seed reservoir 98. Crawling in the groove 108.
The rotating brush 93 has a horizontal axis, and the outer peripheral side is in sliding contact with the outer periphery of the sowing roll 92. As shown in FIG. 13, a driven gear 109 that meshes with the first transmission gear 105 is fixed to the rotation shaft 93 a of the rotary brush 93, and power is transmitted from the first transmission gear 105. The rotary brush 93 is rotationally driven in the direction indicated by the arrow Y, and excess seed on the outer peripheral side of the sowing roll 92 is removed.

  The seed accommodated in the sowing groove 108 is guided by the feeding guide member 94, is accommodated in the sowing groove 108 up to the lower end of the sowing roll 92, and is separated from the feeding guide member 94 at the lower end portion of the sowing roll 92. It falls downward and is sown on the floor soil of the seedling box 2. In addition, seeds that do not fall naturally are pushed out by the scraper 95 and forcibly dropped onto the floor soil of the seedling box 2.

  As shown in FIGS. 11 and 12, the soil covering supply device 14 includes a frame 112 (referred to as a soil covering frame) having left and right side plates 111 erected on each frame member 21 of the conveyor 3, and the soil covering frame 112. A hopper 113 fixed at the top and storing soil, a soil transport conveyor 114 (soil feeding portion) located between the side plates 111 of the cover frame 112 and below the lower end opening of the hopper 113, and the soil transport conveyor 114 includes a power transmission device 115 that transmits power from the soil covering drive shaft 39.

The earth transport conveyor 114 includes a pair of front and rear rolls 116 and 117, an earth feed belt 118 including an endless belt wound around the front and rear rolls 116 and 117, and a tension applying unit that applies tension to the earth feed belt 118. 119.
In the present embodiment, the front roll 116 is a terminal roll, and the rear roll 117 is a start roll. Each of the rolls 116 and 117 includes roll main bodies 116A and 117A, and roll shafts 116B and 117B provided in the center of the roll main bodies 116A and 117A so as to penetrate in the axial direction.

  Power is transmitted from the soil covering drive shaft 39 to the end roll 116 of the soil conveyor 114 via a power transmission device 115 comprising a chain transmission mechanism, and the soil in the hopper 113 received by the soil feed belt 118 is moved forward A. The end-side roll 116 is rotationally driven so as to transfer to the seedling box, and the covering soil is dropped and supplied from the end side of the soil transport conveyor 114 to the seedling box 2 that moves (passes) below the soil transport conveyor 114.

A soil discharge port 121 (within the hopper 113) on the soil feed belt 118 is provided at the lower front side of the hopper 113 and the vertical position can be adjusted to change the opening degree of the discharge port 121. Thus, a gate member 122 for adjusting the amount of soil discharged from the discharge port 121 is provided.
The power transmission device 115 includes a drive-side sprocket 123 attached to the left end side of the soil covering drive shaft 39 so as to be integrally rotatable, and a driven portion provided to be integrally rotatable on the left end side of the roll shaft 116B of the end-side roll 116. Side sprocket 124, a transmission chain 125 wound around these sprockets 123, 124, a drive tensioner 126 that applies tension to the loose side of the transmission chain 125, and a tension roller 127 that guides the tight side portion of the transmission chain 125. And a clutch 128 for intermittently transmitting power from the driving side sprocket 123 to the driven side sprocket 124.

As shown in FIGS. 13 to 16, in the seeding device 13, tension rollers 131 and 132 are provided on the loose side and the tension side of the transmission chain 102, respectively.
The loose-side tension roller 131 is supported on the lower end side of the swing arm 133 so as to be rotatable about a horizontal axis, and is in contact with the outer peripheral side of the transmission chain 102 below the driven sprocket 103. ing.

The swing arm 133 is supported by a support bracket 134 fixed to the left side plate 89 so as to be rotatable about a left-right axis. The front side of the support bracket 134 is fixed to the side plate 89 on the front side of the drive side sprocket 101, and the rear side is extended to the side of the transmission shaft 104 on the left side of the drive side sprocket 101.
The upper side of the swing arm 133 is concentric with the transmission shaft 104 and is pivotally supported by the support bracket 134 via the pivot 135 so that it can swing back and forth. As a result, the loose tension roller 131 is movable in the direction of approaching and separating from the outer peripheral side of the transmission chain 102.

  A torsion coil spring (spring) 136 is fitted onto the pivot 135, one end side of the torsion coil spring 136 is locked to the support bracket 134, and the other end side is locked to the swing arm 133. Accordingly, the tension roller 131 on the loose side is biased so as to press the outer peripheral side of the transmission chain 102 (so that the swing arm 133 swings forward).

The tension roller 132 on the tension side is disposed on the front side of the drive side sprocket 101 in the vicinity of the drive side sprocket 101, and has a support shaft having a horizontal axis fixed to the left frame member 21 of the conveyor 3. The shaft 137 is supported so as to be rotatable around the axis.
The tension-side tension roller 132 is in contact with the inner peripheral side of the transmission chain 102.
The support shaft 137 also serves as a mounting bolt for mounting and fixing the support base 138 for rotatably supporting the seeding drive shaft 23a to the left frame member 21.

The seeding device 13 is provided with a clutch 139 for connecting and disconnecting power transmission from the driving side sprocket 101 to the driven side sprocket 103.
The clutch 139 includes a clutch arm 140 that is supported by the left frame member 21 of the transport conveyor 3 so as to be rotatable about an axis in the left-right direction and is swingable up and down, and a clutch lever that operates the clutch arm 140 with a lever. 141 and a clutch roller 142 that contacts the transmission chain 102.

  The clutch arm 140 is disposed on the left side of the drive-side sprocket 101, and one end side (front end side) is supported by the support shaft 137 that supports the tension-side tension roller 132. The moving center is concentric with the axis of rotation of the tension roller 132 on the tension side. By using the support shaft 137 as both the support of the tension roller 132 on the tension side and the support of the clutch arm 140, the number of members can be reduced and the cost can be reduced.

  The clutch roller 142 is provided on the other end side (rear end side) of the clutch arm 140. The clutch roller 142 is supported by a roller shaft 143 having a left and right axial center provided on the other end side of the clutch arm 140 so as to be rotatable around the axial center, and the inner circumference of the loose side portion of the transmission chain 102. Is on the side. The clutch roller 142 is positioned below the tension roller 131 on the loose side.

The base of the clutch lever 141 is attached to the front side of the swing center of the clutch arm 140. A cylindrical body 144 is fixed to the base of the clutch lever 141, and the cylindrical body 144 is externally fitted to a support pin 145 provided in a direction orthogonal to the longitudinal direction and the left-right direction of the clutch arm 140 so as to be rotatable about its axis. Has been. As a result, the clutch lever 141 is attached to the clutch arm 140 so as to be swingable left and right.

A guide plate 147 in which a guide groove 146 for guiding the clutch lever 141 is formed is provided on the front side of the clutch lever 141.
As shown in FIG. 17, the guide plate 147 is bolted to a bracket 148 attached and fixed to the left frame member 21 of the conveyor 3 so that the vertical position can be adjusted.
The guide groove 146 is formed long in the vertical direction, and is provided with a locking portion 149 that hooks the clutch lever 141 on the upper end side to restrict the downward movement of the clutch lever 141.

  In the clutch 139, in the power transmission state, as shown in FIG. 14, the clutch lever 141 is pulled down, the clutch arm 140 is tilted backward, and the clutch roller 142 is placed above the drive side sprocket 101. The transmission chain 102 is engaged with the drive-side sprocket 101. Thereby, the transmission chain 102 circulates in the direction of arrow D. As the transmission chain 102 circulates in the direction indicated by the arrow D, a load acts on the clutch arm 140 in the pulling direction, and the clutch lever 141 is held in a lowered state by contacting the lower end of the guide groove 146.

When the clutch lever 141 is pulled up from this power transmission state, the clutch arm 140 swings downward, and the transmission chain 102 is driven to the drive side while the clutch roller 142 is positioned behind the drive side sprocket 101 as shown in FIG. The power is disengaged downward from the sprocket 101 and the power from the driving side sprocket 101 to the driven side sprocket 103 is cut off.
At this time, since the tension roller 132 on the tension side of the transmission chain 102 does not move, the tension side of the transmission chain 102 does not sag when the clutch 139 is connected (or disconnected), and pulsation of the seeder roll does not occur. This improves the sowing accuracy.

Further, since the clutch 139 swings the clutch arm 140 by lever operation and separates and meshes the transmission chain 102 with respect to the drive side sprocket 101, there is also an advantage that the connecting / disconnecting operation of the clutch 139 is light.
By engaging the clutch lever with the engaging portion 149 at the position where the clutch lever 141 is pulled up, the clutch is held in the 139 power disconnected state.

  The power transmission device 150 of the seeding device 13 including the driving side sprocket 101, the driven side sprocket 103, the transmission chain 102, the tension rollers 131 and 132 on the tension side and the loose side, and the clutch 139 is provided as a floor soil supply device. 7 may be employed in the power transmission device 44 that transmits power to the soil conveyance conveyor 43 (soil feeding portion) (the power transmission device 44 of the floor soil supply device 7 is similar to the power transmission device 150 of the seeding device 13). May be configured).

  Further, in the power transmission device 115 that transmits power to the soil transport conveyor 114 (soil feeding portion) of the soil covering supply device 14, the tension roller 127 on the tension side is immovable with respect to the transmission chain 125. The same effect as the power transmission device 150 of the seeding device 13 is obtained. The clutch 128 of the power transmission device 115 of the soil covering supply device 14 may be configured in the same manner as the clutch 139 of the power transmission device 150 of the seeding device 13 (the power transmission device 115 of the soil covering supply device 14 is It may be configured similarly to the power transmission device 150).

In the sowing apparatus 13, the sowing roll 92 can be taken out and attached as a single unit from the side (the right side in the present embodiment), and the sowing roll 92 is another sowing roll 92 with different sowing grooves 108. It is possible to replace it.
As shown in FIGS. 18 to 20, the right side plate 89 is formed with an opening 151 that allows the seeding roll 92 to be inserted and removed between the right and left side plates 89 from the right side.

A support plate 152 provided so as to cross the detachment port 151 in the front-rear direction (so as to close the detachment port 151) is disposed on the right side of the detachment port 151, and the front and rear portions of the support plate 152 are disposed. The upper and lower sides are fixedly attached to the right side plate 89 by mounting bolts 153, and the rear intermediate part is fixed to the feeding guide member 94 by mounting bolts 154.
A positioning pin 160 fixed to the right side plate 89 is inserted through the front and rear upper parts of the support plate 152.

As shown in FIG. 20, the second transmission gear 106 and the third transmission gear 107 are disposed on the right side of the support plate 152, and the second transmission gear 106 is prevented from being detached from the transmission shaft 104 by the retaining member 155. The third transmission gear 107 is retained from the roll shaft 99 by a retaining member 156.
The support plate 152 is provided with a bearing member 157 that supports the right side of the roll shaft 99, and the bearing member 157 is detachable to the right from the roll shaft 99.

Further, as shown in FIG. 24B, the left side of the roll shaft 99 is inserted through a bearing member 158 fixed to the left side plate 89 so as to be freely inserted and removed from the inner side in the left-right direction (right side in the present embodiment). The bearing member 158 is rotatably supported.
As shown in FIGS. 18 and 19, the scraper 95 is disposed on the lower surface side front portion of the sowing roll 92. As shown in FIG. 21, the scraper 95 has a large number of scrape members 159 made of plates whose plate surfaces face in the left-right direction, spaced apart in the left-right direction, and the front end side of each scrape member 159 has an axial center in the left-right direction. It is fixed to a pivot shaft 161 having

  Each scrape member 159 has an engagement groove (illustrated) formed on the outer circumferential surface of the roll main body 92A so as to cross the seeding groove 108 on the outer circumferential surface of the roll main body 92A. (Omitted) is inserted. The insertion portion is formed in an arc shape along the peripheral surface of the roll body 92 </ b> A of the seeding roll 92. This forcibly drops seeds that do not fall naturally.

  As shown in FIG. 22, the pivot shaft 161 is supported by the left and right side plates 89 so as to be rotatable about the axis, and the scraper 95 can swing up and down around the pivot shaft 161. When the scraper 95 swings up and down around the pivot shaft 161, the scraper 95 engages with the seeding roll 92 (a part of each scraping member 159 is inserted into each engagement groove of the seeding roll 92). The position is freely changeable between a position (shown by a solid line in FIG. 22) and a retracted position (shown by a virtual line in FIG. 22) away from the outer peripheral side of the sowing roll 92.

Further, as shown in FIG. 21, the scraper 95 penetrates each scrape member 159 in the left-right direction in the middle part in the front-rear direction and penetrates the left-right side plate 89 and protrudes outward in the left-right direction from the left-right side plate 89. A scraper spindle 162 is provided.
Note that a spacer member 163 provided between the scrape members 159 is externally fitted to the pivot support shaft 161 and the scraper support shaft 162.

Each of the left and right side plates 89 is formed with a guide groove 164 for moving the scraper support shaft 162 when the scraper 95 swings up and down.
In addition, the seeding device 13 includes a scraper holding member 165 that holds the scraper 95 at the scrape position. The scraper holding members 165 are provided on the left and right sides of the seeding frame 90, the right scraper holding member 165 is provided on the support plate 152, and the left scraper holding member 165 is provided on the left side plate 89.

As shown in FIG. 22, each scraper holding member 165 includes a swinging member 167 that is pivotally supported by a support pin 166 in the left-right direction and swings back and forth, and an engagement member attached to the swinging member 167. 168.
The right support pin 166 is provided on the support plate 152, and the left support pin 166 is provided on the left side plate 89.

The swing member 167 is formed of a rigid plate material, and the engagement member 168 is formed of an elastic plate material (spring plate).
The engaging member 168 has an upper portion fixed to the swinging member 167 by bolts so that the vertical position can be adjusted, and an engaging portion 169 that receives the scraper support shaft 162 at the scrape position and restricts the swinging of the scraper 95 downward. And a photographing unit 170 for swinging the scraper holding member 165.

The engaging member 168 is swung rearward as shown by an imaginary line in FIG. 22 from a position where the engaging portion 169 receives the scraper supporting shaft 162 as shown by a solid line in FIG. And the scraper 95 swings downward.
Note that the scraper holding member 165 may be detached from the scraper support shaft 162 by swinging the scraper holding member 165 forward.

At the scrape position where the scraper 95 engages with the seeding roll 92, each scrape member 159 is partially inserted into the engagement groove of the seeding roll 92, so that the seeding roll 92 does not move in the left-right direction. By setting 95 to the retracted position, the sowing roll 92 can be moved in the left-right direction, and the sowing roll 92 can be taken out from the desorption port 151.
In order to take out the sowing roll 92 in the sowing device 13 having the above-described configuration, as shown in FIGS. 23 and 24, the retaining members 155 and 156 for retaining the second transmission gear 106 and the third transmission gear 107 are removed. The second transmission gear 106 and the third transmission gear 107 are removed from the transmission shaft 104 and the roll shaft 99, the mounting bolts 153 and 154 fixing the support plate 152 are removed, and the scraper holding member 165 is engaged with the scraper support shaft 162. Release the match.

The procedure for removing these members 106, 107, 153, 154, 155, and 156 and releasing the scraper holding member 165 is not limited, and any procedure may be used.
Next, when the support plate 152 is removed, the seeding roll 92 can be pulled out to the right as a single unit (or inserted from the right side).
In the embodiment of the above-described configuration, the sowing roll 92 can be taken out and attached from the side through the attachment / detachment opening 151 formed in the side plate 89 of the sowing frame 90. It can be employed in the seeder 1 that is compact in the direction A. Further, since the work of taking out and attaching the seeding roll 92 can be performed only from the right side, workability is good.

DESCRIPTION OF SYMBOLS 1 Sowing machine 2 Seedling box 23a Drive shaft 43 Soil delivery part (soil conveyance conveyor)
92 Seed feeding part (seeding roll)
101 Drive-side sprocket 102 Transmission chain 103 Driven-side sprocket 114 Soil feeding section (soil transport conveyor)
131 Tension roller 132 on the loose side 132 Tension roller 136 on the tight side Spring 139 Clutch 140 Clutch arm 142 Clutch roller

Claims (2)

It is a power transmission device that transmits power to the feeding parts (43, 92, 114) of the seeding machine (1) that supplies floor soil to the seedling box (2) to be transported, seeds, and supplies the covering soil. And
A drive chain (102) wound around these sprockets (101, 103) is provided to transmit power from a fixed drive-side sprocket (101) to a driven-side sprocket (103) on a drive shaft (23a) to be rotationally driven, Tension rollers (131, 132) are provided on the tension side and the loose side of the transmission chain (102),
A clutch roller (142) that contacts the inner peripheral side of the slack side portion of the transmission chain (102) is provided on the distal end side of the clutch arm (140) that swings by lever operation, and the clutch arm (140) is A clutch (139) for connecting and disconnecting the power transmission by swinging and separating and engaging the transmission chain (102) with the drive side sprocket (101) is provided,
The loose tension roller (131) is movable in a direction approaching and separating from the outer peripheral side of the transmission chain (102) and is attached so as to press the outer peripheral side of the transmission chain (102) by a spring (136). The power transmission device of the seeder is characterized in that the tension roller (132) on the tension side is in contact with the inner peripheral side of the transmission chain (102) and is immovable with respect to the transmission chain (102) .   The tension-side tension roller (132) is disposed close to the drive-side sprocket (101), and the center of oscillation of the clutch arm (140) is concentric with the rotation axis of the tension-side tension roller (132). The power transmission device for a seeder according to claim 1, wherein:

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