JP2013141430A - Soil-feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soil-feeding device that easily changes soil-feed belts.SOLUTION: In the soil-feeding device that includes a pair of right and left side plates 111 stood at both sides of right and left of a conveying conveyor 3 for placing and conveying a raising seedling box 2 in the back and forth direction, and a soil conveying conveyor 114 having a pair of back and forth rolls 116 and 117 between the right and left side plates 111 and an endless soil-feed belt 118 wound on the back and forth rolls 116 and 117, and drops soil in a hopper 113 mounted above the soil conveying conveyor 114 from the end of the soil conveying conveyor 114 to feed the soil to the raising seedling box 2 passing under the lower side of the soil conveying conveyor 114, a belt attaching and detaching opening 136 for taking out the soil-feed belt 118 from the side and attaching it to one of the right and left side plates 111 is opened and formed.

Description

  The present invention relates to a soil supply device employed in a seeding machine that supplies floor soil, watering, sowing, and covering with soil to the seedling box while conveying the seedling box.

There exists a thing of patent document 1 as a soil supply apparatus employ | adopted as a seeding machine which performs floor soil supply, irrigation, sowing, and covering soil supply to this seedling box while conveying a seedling box.
The seeder of this patent document 1 has the conveyance conveyor which mounts a seedling box and conveys it in the front-back direction.
The soil supply apparatus includes a pair of left and right side plates standing upright on both the left and right sides of the transport conveyor, and includes a pair of front and rear rolls and an endless soil feed belt wound around the front and rear rolls between the left and right side plates. A conveyor is provided, and a hopper storing soil is disposed above the soil transport conveyor.

The soil in the hopper is dropped and supplied onto the soil transport conveyor, the soil on the soil transport conveyor is dropped from the end of the soil transport conveyor, and the soil is supplied to the seedling box that passes under the soil transport conveyor.
In the soil supply apparatus of this cited document 1, floor soil is supplied during transportation to one side before and after the seedling box, and covering soil is supplied during transportation to the other side before and after the seedling box.

Japanese Patent No. 3963882

In the conventional soil supply device, when replacing the soil feed belt of the soil transport conveyor, the device is disassembled and the soil feed belt is replaced.
Therefore, there is a problem that it takes time to replace the earth feed belt.
Then, this invention makes it a subject to provide the soil supply apparatus which can perform replacement | exchange of a soil feed belt easily in view of the said problem.

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 includes a pair of left and right side plates erected on both the left and right sides of a conveyor that carries a seedling box and conveys it in the front-rear direction, and the pair of front and rear rolls and the front and rear rolls between the left and right side plates An earthless conveyor belt having an endless earth feeding belt wound around the earth, and the earth in the hopper provided above the earth conveying conveyor is dropped from the end of the earth conveying conveyor to move below the earth conveying conveyor. In the soil supply device that supplies soil to the nursery box that passes,
The left and right one side plate is formed with an opening for belt attachment / detachment opening for taking out and attaching the earth feed belt from the side.

In the invention according to claim 2, a cover plate for detachably mounting the belt attachment / detachment opening is detachably attached to the side plate on which the belt attachment / detachment opening is formed, and the front and rear rolls are rotatably supported on the cover plate. And a tension applying means for applying tension to the earth feed belt.
In the invention according to claim 3, comprising a tension applying means for supporting one of the front and rear rolls so as to be movable back and forth, and applying tension to the earth feed belt,
The tension applying means includes an adjusting bolt that moves integrally with the one roll and has an axial center in the front-rear direction, and an adjusting bolt that is screwed into the adjusting bolt to advance the earth feed belt. An adjustment nut for movement, a support member that is fixed to the side plate and restricts the adjustment nut from moving in a direction opposite to the direction of tension of the earth feed belt, and is interposed between the adjustment nut and the support member. A tension switching member
The tension switching member has a wide part with a wide front-rear width and a narrow part with a narrower front-rear width than the wide part, and is moved in a direction perpendicular to the axis of the adjustment bolt to make the wide part or the narrow part By selectively interposing between the adjustment nut and the support member, the earth feed belt is switched between a tension state and a relaxed state.

  According to the present invention, the earth feed belt can be taken out and attached via the belt attaching / detaching opening formed in the side plate, and the earth feed belt can be replaced without disassembling the apparatus.

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 plane sectional view of a soil conveyance conveyor. It is a plane expanded sectional view by the side of the belt desorption port of a soil conveyance conveyor. It is a top sectional view of the tension applying means on the belt detachment port side. It is a side view of a belt removal opening formation part. It is the side view and top sectional view of a cover body. It is a side view of the belt removal opening formation part of the state which removed the cover plate. It is a back surface sectional view of the right side part of a starting end side roll. FIG. 6 is a partial cross-sectional view of a side surface of a tension applying unit on a belt removal opening side. It is a rear view of a tension switching member.

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 located between the side plates 40 of the floor soil frame 41 and below the lower end opening of the hopper 42; The power transmission mechanism 44 mainly transmits power from the drive shaft 23h.

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 mechanism 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 positioned below the seed tank 91, a rotating brush 93 positioned above the seeding roll 92, and a feeding guide member 94 positioned on the back side of the seeding roll 92. And a scraper 95.

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 left-right axial center and is disposed between the left and right side plates 89 of the sowing frame 90, and a roll shaft 99 is provided on the axial center of the sowing roll 92 so as to be integrally rotatable. Is supported by the left and right side plates 89 so as to be rotatable about the left and right axes.

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 rotatably supported between the side plates 89. 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 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 direction indicated by the arrow X, so that seeds in the seed reservoir 98 are sown in the sowing 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. Further, power is transmitted from the first transmission gear 105 to the rotating brush 93, and the rotating brush 93 is rotationally driven in the direction indicated by the arrow Y, so that 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 to 20, 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 transport conveyor 3, and the soil covering frame 112. A hopper 113 fixed at the top and storing soil, a soil transport conveyor 114 located between the side plates 111 of the soil covering frame 112 and below the lower end opening of the hopper 113, and a soil covering drive shaft 39 on the soil transport conveyor 114 The power transmission mechanism 115 which transmits motive power from is provided.

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 side roll 116 of the soil transport conveyor 114 via a power transmission mechanism 115 including 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 mechanism 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 pair of drive tensioners 126 that apply tension to the transmission chain 125, a guide roller 127 that guides the transmission chain 125, and a drive side sprocket And a clutch 128 for intermittently transmitting power from the driven sprocket 124 to the driven sprocket 124.

  As shown in FIGS. 13 and 18, between the front and rear rolls 116 and 117, there is a pair of front and rear support members 129 that are located on the lower side of the upper part of the earth feed belt 118 and support the upper part of the earth feed belt 118. Is provided. The lower support member 129 includes a support rod 130 disposed in the left-right direction, and a rotating roller 131 that is externally fitted to the support rod 130 so as to be rotatable about the left-right axis.

The left end portion side of the support rod 130 is bolted to the left side plate 111, and the right end portion side of the support rod 130 is fixed to the support stay 132.
The support stay 132 is formed of a plate material, and a vertical wall 133 whose plate surface faces in the left-right direction, an upper wall 134 that extends inward in the left-right direction from the upper end of the vertical wall 133, and a lower end of the vertical wall 133 It consists of a lower wall 135 extending outward in the left-right direction. The right end portion side of the support rod 130 is welded and fixed to the upper surface of the upper wall 134 of the support stay 132.

As shown in FIGS. 16, 18 and 19, the earth feed belt 118 is taken out and attached to the side (right side) on one of the left and right side plates 111 (right side plate 111 in this embodiment) of the soil covering frame 112. A belt attaching / detaching port 136 for opening is formed.
This belt attaching / detaching port 136 is located on the right side of the soil transport conveyor 114 and is formed in an oval shape that is longer in the front-rear direction than the side surface shape of the soil feed belt 118.

A circumferential groove 137 formed in the circumferential direction is provided on the right side of the rolls 116 and 117 on the front and rear sides of the soil conveyance conveyor 114 (on the belt removal port 136 side). Projections 138 that fit into the circumferential grooves 137 of the rolls 116 and 117 are formed in the circumferential direction.
The protrusions 138 are provided at intervals in the belt circumferential direction (provided intermittently), but may be provided continuously.

The protrusion 138 is fitted in the circumferential groove 137 so that the earth feed belt 118 is positioned in the left-right direction with respect to the rolls 116 and 117.
The left circumferential surface of each roll 116, 117 is formed in a smooth shape from the circumferential groove 137, and the protrusion 138 is detached from the circumferential groove 137, whereby the earth feed belt 118 is passed through the belt attaching / detaching port 136. Can be pulled out to the right. Further, by inserting the earth feed belt 118 from the right side through the belt attaching / detaching port 136 and fitting the protrusion 138 into the circumferential groove 137, the earth feeding belt 118 can be attached from the belt attaching / detaching port 136 side. .

The right side plate 111 is overlapped with the right and left outer surfaces of the right side plate 111 so as to close the belt attaching / detaching port 136, and the front and rear are detachably attached and fixed to the right side plate 111 by bolts 139. 140 is provided.
As shown in FIGS. 16 and 17, a lower side of the lid plate 140 at the center in the front-rear direction is formed with a U-shaped notch 142 that opens downward, and the earth feed belt is formed at the portion where the notch 142 is formed. 118 is exposed. The upper edge 142 a of the notch 142 is in contact with the lower wall 135 of the support stay 132, and the vertical wall 133 of the support stay 132 is fixed to the lid plate 140 with bolts 143.

A front bearing 144 that rotatably supports the right end portion of the roll shaft 116B of the end side roll 116 is provided at the front portion of the cover plate 140, and the roll shaft 117B of the start end side roll 117 is provided at the rear portion of the cover plate 140. A rear bearing 145 that rotatably supports the right end is provided.
Respective bearings 144 and 145 are fitted to the respective roll shafts 116B and 117B so as to be detachable from the right side, and the rear bearing 145 is a retaining member comprising a circlip detachably fitted to the roll shaft 117B of the start end side roll 117. 146 prevents the roll shaft 117B from coming off.

The left end portions of the roll shafts 116 </ b> B and 117 </ b> B of the end side roll 116 and the start end side roll 117 are rotatably supported by front and rear bearings 144 and 145 provided on the left side plate 111.
The right end side of the roll shaft 117B of the start end side roll 117 protrudes outward in the left-right direction through a shaft insertion hole 149 formed in the cover plate 140, and the left end side of the roll axis 117B of the start end side roll 117 is the left side. It protrudes outward in the left-right direction through a shaft insertion hole 149 formed in the side plate 111, and a rear bearing 145 is fitted to a portion of each roll shaft 116B, 117B protruding from the shaft insertion hole 149. .

The left and right shaft insertion holes 149 are each formed in a long hole shape that is long in the front-rear direction, and the start-end side roll 117 is movable in the front-rear direction. Further, the end side roll 116 is not movable in the front-rear direction.
As shown in FIG. 19, L-shaped guide members 151 are provided above and below the left and right rear bearings 145 to guide the rear bearings 145 so as to be movable in the front-rear direction. The guide member 151 for guiding the right rear bearing 145 is fixed to the cover plate 140, and the guide member 151 for guiding the left rear bearing 145 is fixed to the left side plate 111.

Then, the tension is applied to the earth feed belt 118 by moving the start side roll 117 backward by the tension applying means 119.
As shown in FIG. 13, the tension applying means 119 is provided on both the left and right sides of the start end side roll 117.
As shown in FIGS. 15 and 20, the tension applying means 119 includes a holder 152 in which the rear bearing 145 is accommodated, an adjustment bolt 153 fixed to the rear portion of the holder 152, and the adjustment bolt 153 in the holder 152. A fixing nut 154 to be fixed to the side plate, a support member 155 fixed to the side plate 111 side, an adjustment nut 156 to adjust the tension, a lock nut 157 to restrict the movement of the adjustment nut 156, and a soil feed belt 118 are provided. A tension switching member 158 that switches between a tension state and a relaxed state with one touch is provided.

As shown in FIGS. 15 and 20, the rear portion of the holder 152 protrudes rearward from the rear bearing 145, and the head 153 a of the adjustment bolt 153 is interposed between the rear wall 152 a of the holder 152 and the rear bearing 145. The screw shaft portion 153b of the adjustment bolt 153 extends through the rear wall 152a of the holder 152 toward the rear.
The fixing nut 154 is positioned behind the rear wall 152a of the holder 152 and is screwed into the adjusting bolt 153. By tightening the fixing nut 154, the fixing nut 154 and the head 153a of the adjusting bolt 153 The adjustment bolt 153 is fixed to the holder 152 by sandwiching the rear wall 152a of the holder 152 between the two.

Further, the adjustment bolts 153 of the left and right tension applying means 119 are connected by a connecting member 159. The connecting member 159 includes a mounting portion 160 interposed between the fixing nut 154 and the rear wall 152a of the holder 152, and a connecting portion 161 that connects the left and right mounting portions 160.
As shown in FIG. 19, the insertion portion 162 into which the screw shaft portion 153 b of the attachment portion 160 is inserted is configured by an open groove outward in the left-right direction, and when the cover plate 140 is removed, the fixing nut 154 is attached. By loosening, the adjustment bolt 153 can be pulled out from the groove opening of the insertion portion 162 to the right.

The support member 155 is fixed to the cover plate 140 (on the side plate 111 side) in the right tension applying means 119, and is fixed to the left side plate 111 in the left tension applying means 119.
As shown in FIGS. 15 and 20, the support member 155 includes a fixed wall portion 163 fixed to the inner surface in the left-right direction of the lid plate 140 or the side plate 111, and left and right sides from the rear end of the fixed wall portion 163. The support wall portion 164 extends outward in the direction, and the restriction wall portion 165 extends rearward from the left and right outer ends of the support wall portion 164.

A screw insertion hole 166 is formed in the support wall portion 164, and a screw shaft portion 153 b of the adjustment bolt 153 is inserted through the screw insertion hole 166 and extends rearward.
The adjustment nut 156 is screwed to the screw shaft portion 153b behind the support wall portion 164, and the lock nut 157 is screwed to the screw shaft portion 153b behind the adjustment nut 156.
The tension switching member 158 is interposed between the support wall portion 164 and the adjustment nut 156.

As shown in FIGS. 15, 20, and 21, the tension switching member 158 includes a pair of front and rear plates 167 and 168 having elasticity. The front and rear plates 167 and 168 include vertical wall portions 167a and 168a whose plate surfaces face front and rear, and upper wall portions 167b and 168b extending rearward from the upper ends of the vertical wall portions 167a and 168a.
A space in the front-rear direction is provided between the upper portions of the vertical wall portions 167a and 168a of the front and rear plates 167 and 168, and the lower portions of the vertical wall portions 167a and 168a of the front and rear plates 167 and 168 are in close contact with each other. Therefore, the vertical wall portions 167a and 168 of the front and rear plates 167 and 168 are provided.
The upper part of “a” is a wide part 169 having a wide front and rear width, and the lower part of the vertical wall parts 167 a and 168 a of the front and rear plates 167 and 168 is a narrow part 170 having a narrower front and rear width than the wide part 169.

The upper wall portions 167b and 168b of the front and rear plates 167 and 168 are in close contact with each other in the vertical direction, and the close contact portion is a shooting portion 171 that hooks a finger or the like or holds it with a finger.
As shown in FIGS. 20 and 21, the vertical wall portions 167a and 168a of the front and rear plates 167 and 168 are formed with insertion holes 172 through which the screw shaft portions 153b of the adjustment bolts 153 pass, and the insertion holes 172 have a wide width. A long hole extending in the vertical direction is formed across the portion 169 and the narrow portion 170, and the tension switching member 158 is movable up and down. Accordingly, the wide portion 169 and the narrow portion 170 can be selectively interposed between the adjustment nut 156 and the support wall portion 164 of the support member 155.

The front and rear plates 167 and 168 are in contact with the restriction wall 165 of the support member 155, and the restriction wall 165 restricts the tension switching member 158 from turning around the screw shaft 153 b of the adjustment bolt 153. And it is guided in the vertical direction.
In addition, an engaging portion 173 protruding forward is formed between the wide portion 169 and the narrow portion 170 in the middle in the vertical direction of the front plate 167. As shown in FIG. 20A, the engaging portion 173 engages with the lower end side of the support wall portion 164 when the wide portion 169 is interposed between the adjustment nut 156 and the support wall portion 164. The upward movement of the switching member 158 is restricted. As shown in FIG. 20B, when the narrow portion 170 is interposed between the adjustment nut 156 and the support wall portion 164, it engages with the upper end side of the support wall portion 164. By doing so, the downward movement of the tension switching member 158 is restricted.

Further, when the tension switching member 158 is forcibly moved up and down, the front plate 167 is elastically deformed so that it is detached from the end of the support wall 164.
In the tension applying means 119 configured as described above, when the adjustment nut 156 is screwed in a state where the wide portion 169 is interposed between the adjustment nut 156 and the support wall portion 164, the adjustment nut 156 is moved forward by the support member 155. Since the movement in the direction opposite to the direction in which the earth feed belt 118 is tensioned is restricted, the adjustment bolt 153 moves rearward (in the direction in which the earth feed belt 118 is tensioned) to move to the roll on the start end side. 117 moves backward and tension is applied to the earth feed belt 118.

If the tension switching member 158 is pulled up from this state and the narrow portion 170 is interposed between the adjustment nut 156 and the support wall portion 164, a gap S is formed between the tension switching member 158 and the adjustment nut 156. As a result, the roll 117 on the start end side moves forward (the end roll 116 side), and the tension of the earth feed belt 118 is loosened.
Further, when the tension switching member 158 is pushed down from this state and the wide portion 169 is interposed between the adjustment nut 156 and the support wall portion 164, the earth feed belt 118 is also tensioned.

In this way, the earth feed belt 118 can be switched between a tension state and a relaxed state by one touch only by moving the tension switching member 158 up and down.
When the seeding machine 1 is not used, the soil feed belt 118 is loosened in order to prevent early deterioration of the soil feed belt 118. In this embodiment, the soil feed belt 118 is relaxed from the stretched state. Since it can be switched to the state with one touch, it is convenient.

  In order to replace the earth feed belt 118 in the sowing apparatus 13 having the above-described configuration, the bolts before and after the retaining member 146 that removes the rear bearing 145 from the roll shaft 117B are removed and the cover plate 140 is fixed to the side plate 111. The bolt 143 which fixes the vertical wall 133 of 139 and the support stay 132 is removed, and the fixing nut 154 is loosened. As a result, the cover plate 140 can be removed.

Then, after the protrusion 138 is detached from the circumferential groove 137 of each roll, the earth feed belt 118 is pulled out to the right via the belt attaching / detaching port 136.
Even when the earth feed belt 118 is replaced, in order to easily take out the earth feed belt 118, the tension of the earth feed belt 118 is loosened, but the tension switching member 158 loosens the tension of the earth feed belt 118 with one touch. Therefore, the work of replacing the earth feed belt 118 can be performed smoothly.

When the cover plate 140 is removed to remove the earth feed belt 118, the right side support of the start end side roll 117 is lost and the right side support of the connecting member 159 is lost, and the right side of the start end side roll 117 and the connecting member 159 is Since it can move to some extent, the attachment wall portion 160 of the connecting member 159 does not obstruct the attachment / detachment of the earth feed belt 118.
The tension switching member 158 is not limited to vertical movement, and may be moved in a direction perpendicular to the axis of the adjustment bolt 153 other than vertical.

Further, when the rear roll 117 (start end side roll) is driven, the tension applying means 119 is provided on the front roll 116 side.
The detachment structure of the earth feed belt 118 may be adopted in the floor earth supply device 7. Also, the tension applying means 48 of the floor soil supply device 7 has the same structure as the tension applying means 119 employed in the soil covering supply device 14.

  Further, the detaching structure of the tension applying means 119 and the soil feed belt 118 may be adopted in a soil supply device that is used for both the soil supply and the soil covering supply. In this case, the discharge port 121 and the gate member 122 described above are also provided at the lower rear side rear portion of the soil covering supply device 14, and soil is discharged from one of the discharge ports 121 when the seedling box 2 is transported forward and backward. The floor soil may be supplied to the box 2, and the soil may be discharged from the other discharge port 121 to supply the floor soil to the seedling box 2 when the seedling box 2 is transported forward and backward.

2 Seedling box 3 Transport conveyor 111 Side plate 113 Hopper 114 Soil transport conveyor 116 Front roll 117 Rear roll 118 Soil feed belt 119 Tension applying means 136 Belt desorption port 140 Cover plate 144 Bearing 145 Bearing 153 Adjustment bolt 155 Support member 156 Adjustment Nut 158 Tension switching member 169 Wide part 170 Narrow part

Claims (3)

It has a pair of left and right side plates (111) erected on both the left and right sides of the conveyor (3) for placing the seedling box (2) and conveying it in the front-rear direction, and a pair of front and rear rolls between the left and right side plates (111) (116, 117) and an endless earth transport belt (118) wound around the front and rear rolls (116, 117), and provided above the earth transport conveyor (114). In the soil supply device for dropping the soil in the hopper (113) from the end of the soil transport conveyor (114) and supplying the soil to the seedling box (2) passing under the soil transport conveyor (114),
The soil supply apparatus according to claim 1, wherein a belt attaching / detaching port (136) for taking out and attaching the soil feed belt (118) from the side is formed in the left and right side plates (111).   A cover plate (140) for closing the belt attachment / detachment port (136) is detachably attached and fixed to the side plate (111) in which the belt attachment / detachment port (136) is formed, and front and rear rolls are attached to the cover plate (140). A bearing (144, 145) for rotatably supporting (116, 117) and a tension applying means (119) for applying tension to the earth feed belt (118) are provided. The soil supply device described. It includes tension applying means (119) for supporting one of the front and rear rolls (117) so as to be movable back and forth, and applying tension to the earth feed belt (118),
The tension applying means (119) is integrally moved with the one roll (117) and has an adjustment bolt (153) having an axial center in the front-rear direction, and is screwed into the adjustment bolt (153) to advance. Thus, the adjustment nut (156) for moving the adjustment bolt (153) in the direction of tensioning the earth feed belt (118) and the tension direction of the earth feed belt (118) fixed to the side plate (111) side A support member (155) for restricting movement of the adjustment nut (156) in the reverse direction; and a tension switching member (158) interposed between the adjustment nut (156) and the support member (155). ,
The tension switching member (158) has a wide part (169) with a wide front-rear width and a narrow part (170) with a narrow front-rear width than the wide part (169), and the axis of the adjustment bolt (153). By moving the wide portion (169) or the narrow portion (170) selectively between the adjustment nut (156) and the support member (155) by moving in the direction orthogonal to the earth feed belt (118) The soil supply device according to claim 1 or 2, wherein the soil is switched between a tension state and a relaxed state.

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