JP2007228891A - Planting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a planting apparatus capable of surely transporting a seedling mat downward (downstream side) by a seedling transporting belt while firmly pressing the seedling mat on a seedling table to prevent the slip-down of the mat. <P>SOLUTION: The seedling table 16 is provided, on the lower part of the table, with seedling mat thrusting members 111, 111..., a lateral shaft 113 supporting the base parts of the seedling mat thrusting members 111, 111..., and a swinging arm 41 fixed to the lateral shaft 113 and rotating interlocked with the motion of the seedling transporting belt 92. A seedling dangling prevention plate 54 is fixed in lateral direction to a seedling mat press 46, and the seedling mat thrusting members 111, 111... are placed at the downstream side relative to the seedling dangling prevention plate 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rice transplanter, and more particularly, to a technique of a planting apparatus for planting a seedling while conveying a seedling mat placed on a seedling placing table downward.

Conventionally, when the seedling platform reaches the moving end in the vehicle width direction, the seedling mat placed on the seedling platform is conveyed downward by a seedling feeding belt or a seedling feeding roller. The configuration was And it becomes the composition which presses a seedling mat against the seedling mounting stand (seedling feeding belt or seedling feeding roller) side by arranging a stick-shaped seedling mat presser on the seedling mounting stand in the front-rear direction in parallel with the seedling mounting stand. It was. The seedling mat presser is configured so as to be detachable on the seedling stage by, for example, allowing the upper engaging part to be engaged with and disengaged from the engaging part on the seedling stage (see, for example, Patent Document 1).
JP 2004-141097 A

However, in the conventional rice transplanter, since the seedling mat is pressed only by the seedling mat presser, there is a risk that the seedling mat may fall off due to vibrations of the rice transplanter that occur during traveling. There was a risk of inconsistency. In particular, in the seedling mat located below the lower end of the seedling feeding belt, the suppression pressure is reduced, and in the part where the seedling was scraped off by the front planting claw located at the left end or the right end, A gap was generated between the lower end of the seedling mat and the lower end of the seedling mount, and the seedling mat was easily slipped off.
Therefore, the problem to be solved by the present invention is that the seedling mat can be reliably conveyed downward (downstream) by the seedling feeding belt while firmly holding the seedling mat on the seedling mount so as not to slide down. It is to provide a planting device.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in the first aspect, the planting device is configured to convey the seedling mat placed on the seedling placing table downward by the seedling feeding belt while pressing the seedling mat by holding the seedling mat. A seedling mat piercing member whose tip is plunged into the seedling mat, a horizontal axis that supports the base of the seedling mat piercing member, and the horizontal axis are fixedly provided on the lower part of the mounting base to operate the seedling feeding belt. A swinging arm that rotates in conjunction with the seedling mat, and a seedling prevention plate is fixed to the seedling mat presser in the width direction, and the seedling mat entry member is disposed downstream of the seedling prevention plate. It is a thing.

  According to a second aspect of the present invention, a lower end of the seedling sag prevention plate is positioned closer to the placement surface of the seedling platform than the upper end of the seedling mat entry member at the time of entry.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, the seedling dripping prevention plate can prevent the seedling on the seedling mat from hanging down to the downstream side of the seedling mount, and prevents the seedling tip from being caught or crushed by the vertical movement of the seedling mat entry member. can do. In addition, even when the length of the seedling mat entry member is configured to be shorter than the length of the seedling, the horizontal axis or the like can be prevented from interfering with the seedling droop prevention plate.

  In Claim 2, when a horizontal axis moves up and down, it can prevent that a seedling is pinched | interposed between a horizontal axis and a seedling droop prevention board, and can prevent the seedling before planting being damaged.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an embodiment of a riding rice transplanter equipped with a planting device 4 of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an embodiment of a planting device 4 of the present invention. 4 is a front view, FIG. 5 is a front perspective view showing the lower part of the planting device 4, and FIG. 6 is an enlarged front perspective view showing the drive mechanism 15 of the seedling feeding belt 92. 7 is a rear perspective view showing the support structure of the swing arm 41, and FIG. 8 is a partial left sectional view showing the positional relationship between the seedling dripping prevention plate 54 and the seedling mat entry members 111, 111. FIG.

First, as an embodiment of the present invention, an overall configuration of an 8-row riding rice transplanter on which a planting device 4 is mounted will be described.
As shown in FIG. 1 and FIG. 2, in the riding rice transplanter, the planting device 4 is disposed at the rear part of the traveling unit 1 via the lifting link mechanism 27, and the traveling unit 1 places the engine 2 above the front part of the body frame 3. The front wheel 6 is supported on the front lower part via the front axle case, and the rear wheel 8 is supported on the rear part via the rear axle case 7.
The engine 2 is covered with a bonnet 9, steering handles 14 are arranged on the dashboard 5 at the rear of the bonnet 9, and both sides of the bonnet 9 and the rear body frame 3 are covered with a vehicle body cover 12. The seat 13 is disposed behind the handle 14, the both sides of the bonnet 9 are front steps, the front portion of the seat 13 is a middle step, and the left and right sides of the seat 13 are rear steps. Further, on both sides of the bonnet 9, spare seedling platforms 10 and 10 are arranged.
A lever such as a travel shift lever is disposed on the side of the dashboard 5, and a pedal such as a travel pedal is disposed on a step below the dashboard 5.

The planting device 4 in the present embodiment is composed of a seedling mounting table 16, planting claws 17 and 17, a center float 34, a side float 35, a seedling mat presser 46, a seedling feeding belt 92, a seedling mat holding mechanism 100, and the like. It is disposed behind the traveling unit 1.
The seedling table 16 is disposed at a low height in front and back, and a rear lower portion of the seedling table 16 is supported by a lower guide rail 18 and a front upper portion of the seedling table 16 is supported by an upper guide rail 19 so as to be slidable in the left and right directions. ing. Specifically, the lower guide rail 18 and the upper guide rail 19 are supported by the planting transmission frame 20 via support frames 65, 66, etc., which will be described later. Then, the chain case 21 is protruded rearward from the planting transmission frame 20 through the connecting pipe 63, and the rotary case 22 that rotates in one direction is disposed at the rear part of the chain case 21. A pair of planting claws 17 and 17 are arranged.

A front portion of the planting transmission frame 20 is connected to the lifting link mechanism 27 via a rolling fulcrum shaft 68, and the lifting link mechanism 27 includes a top link 25, a lower link 26, and the like. The planting device 4 can be moved up and down by a lifting cylinder (not shown) arranged below.
In this way, the riding rice transplanter slides the seedling table 16 back and forth as it travels forward, drives the planting claws 17 and 17 in synchronism with the reciprocating motion, cuts out the seedlings for one strain, and continuously It is configured to perform planting work.
In description regarding the planting apparatus 4 of this invention, let the front upper part of the seedling mounting stand 16 be an upstream, and let the rear lower part of the seedling mounting stand be a downstream.

Next, the support structure of the planting apparatus 4 which concerns on a present Example is demonstrated.
As shown in FIGS. 3 to 5, a planting drive case 61 having a planting input shaft 75 operatively connected to a PTO shaft (not shown) provided in the traveling unit 1 below the seedling stage 16. Is arranged. A vertical feed shaft 88 projects from the right side surface of the planting drive case 61 in the vehicle width direction.
Then, the planting device 4 is arranged in the vehicle width direction so as to connect the connecting pipe 63, the pair of left and right side frames 65, 65 standing on the connecting pipe 63, and the upper portions of the side frames 65, 65. And a rolling frame 66 extending.

Such a planting device 4 can be raised and lowered to the traveling unit 1 as described above via the hitch bracket 23 and the lifting link mechanism 27 including the top link 25 and the lower link 26 connected to the hitch bracket 23. It is connected to.
Further, the planting device 4 is swingable in the vehicle width direction with respect to the traveling unit 1 so that the planting device 4 can be held in a horizontal state even when the traveling unit 1 is inclined in the left-right direction. It has become. Specifically, the planting device 4 includes a fulcrum member 69 coupled to the planting drive case 61, and a pair of left and right frames having a lower end coupled to the fulcrum member 69 and an upper end coupled to the rolling frame 66. The fulcrum member 69 is swingably supported around a rolling fulcrum shaft 68 provided on the hitch bracket 23 along the vehicle front-rear direction.
A hydraulic rolling cylinder 73 is interposed between the hitch bracket 23 and one of the left and right frames, and the planting device 4 is controlled by moving the hydraulic rolling cylinder 73 forward and backward. Can be swung around the rolling fulcrum shaft 68.

Hereinafter, a configuration for pressing the seedling mat on the seedling mount 16 will be described.
As shown in FIG. 3, the seedling stage 16 is provided with ribs 16 a, 16 a... On both the left and right sides of the top surface, and the both sides of the seedling mat placed on the seedling stage 16 are provided. The ribs 16a and 16a can be guided. A seedling mat presser 46 is disposed between the ribs 16a and 16a.
The seedling mat presser 46 includes vertical presser bars 46a, 46a, etc., a horizontal support bar 46b, a support shaft 46c, etc., and the vertical presser bars 46a, 46a are parallel to each other between the ribs 16a, 16a. Has been placed. And it is the structure which presses the seedling mat which is not shown on the seedling stand 16 on the upper surface of the seedling mounting stand 16 by this vertical pressing bar 46a.

  The upstream side (upper front side) of the vertical pressing bar 46a is formed in a substantially inverted V shape in side view, and the tip is fixed to the horizontal support bar 46b. The horizontal support bar 46b is engaged with locking portions 51 and 51 provided upright at the upstream position of the ribs 16a and 16a.

On the other hand, as shown in FIGS. 3, 7, and 8, the downstream side (rear lower side) of the vertical presser bar 46a is bent in an inverted Z shape in the left side view to form a rising portion 46d. The upper end of the rising portion 46d is bent in the downstream direction and fixed to the support shaft 46c by welding or the like. Both sides of the support shaft 46c are supported by stays 50 and 50 provided upright on the seedling table 16 or the ribs 16a and 16a.
Further, a seedling prevention plate 54 is fixed to the rising portion 46d in parallel with the rising portion 46d. The seedling prevention plate 54 is a plate-like member that is horizontally mounted on the upper and lower portions of the pair of rising portions 46d and 46d formed between the ribs 16a and 16a. By disposing the seedling prevention plate 54, seedlings on the seedling mat located immediately upstream of the seedling prevention plate 54 hang down to the downstream side of the seedling mounting table 16, and a seedling mat entry member to be described later is provided. It is possible to prevent the seedling tip from being caught or crushed by vertical movement.

Next, the drive mechanism 15 for the seedling feeding belt 92 will be described.
As shown in FIG. 3 and FIG. 4, a seedling feeding belt 92 is disposed in the same plane as the seedling mounting table 16 from the upstream portion to the downstream portion of the seedling mounting table 16. Thus, the seedling mat placed on the seedling stage 16 is transported downstream.
As shown in FIGS. 4 and 5, in the planting device 4 of this embodiment, the planting input shaft 75 and the lateral feed shaft and vertical feed shaft 88 (not shown) are operatively connected in a planting drive case 61. Yes. Specifically, the transverse feed shaft and the longitudinal feed shaft 88 are drive shafts that extend from the planting drive case 61 in the vehicle width direction and are always rotating, and one end portion thereof is in the planting drive case 61. The other end is pivotally supported by a bearing plate or the like by being operatively connected to the planting input shaft 75. In the planting drive case 61, a transmission mechanism (not shown) that performs multi-stage shifting of the driving force input from the planting input shaft 75 is housed. The driving force after shifting is transmitted.

As shown in FIGS. 5 and 6, a second vertical feed shaft 31 is disposed substantially above the vertical feed shaft 88, and a fork cam 32 (described later) is disposed substantially above the second vertical feed shaft 31. A belt drive shaft 33 pivotally supported is provided.
On the longitudinal feed shaft 88, two spaces are provided at the same interval as the interval between the ribs 16a, 16a,... Push cams 91 and 91 are fixed.
As will be described later, the second vertical feed shaft 31 is configured to be movable in an arc shape around the belt drive shaft 33 as the fork cam 32 rotates.

  The belt drive shaft 33 is fixedly provided with drive pulleys 38, 38,... Around which the lower ends of the seedling feeding belts 92, 92,. As shown in FIGS. 4 and 5, the seedling feeding belt 92 includes the driving pulley 38 and a driven pulley (not shown) loosely fitted on a belt driven shaft spaced from the driving pulley 38 in the upstream direction. And is driven by the drive pulley 38.

  As shown in FIGS. 5 and 6, a fork cam 32 is loosely fitted to the belt drive shaft 33, and the belt is adjacent to the fork cam 32 via a one-way clutch (not shown) on the belt drive shaft 33. A drive cam 53 is externally fitted. The one-way clutch transmits the driving force of the belt driving cam 53 to the belt driving shaft 33 only when the belt driving cam 53 rotates in the direction in which the seedling mat is conveyed downstream.

The fork cam 32 is disposed substantially below an action frame 40 and a rib 16a, which will be described later. When the seedling stage 16 reaches one moving end and the other moving end in the vehicle width direction, the longitudinal feed is performed. It is loosely fitted on the belt drive shaft 33 so as to come into contact with one or the other of the pair of push cams 91 and 91 on the shaft 88.
That is, the seedling feed belt is driven by the driving force of the longitudinal feed shaft 88 through the pair of push cams 91, 91, the fork cam 32, the second longitudinal feed shaft 31, the belt drive cam 53, and the belt drive shaft 33. 92 is driven intermittently.

Specifically, as shown in FIG. 6, the fork cam 32 is welded to a base portion 32 b that is loosely fitted to the belt drive shaft 33, a contact portion 32 c that comes into contact with the push cam 91, and a U-shaped member 37 described later. The welded portion 32d to be formed is integrally formed. A U-shaped member 37 having a U-shape in front view is fixed to the welded portion 32d by welding or the like, and a lower end portion of an action frame 40 described later is pivotally supported on the U-shaped member 37.
In addition, the lower end portion of the action frame 40 other than the belt drive mechanism 15 includes a loose fitting member (not shown) configured by only a base portion 32b and a weld portion 32d loosely fitted to the belt drive shaft 33, and the weld portion 32d. It is supported by a U-shaped member 37 that is welded to each other.

The belt drive cam 53 is formed by integrally forming a base portion 53 b that is loosely fitted to the belt drive shaft 33 and an engagement portion 53 c that is engaged with the second longitudinal feed shaft 31. The engaging portion 53c of the belt drive cam 53 is formed in a shape that engages with the second vertical feed shaft 31 when the fork cam 32 rotates and the second vertical feed shaft 31 rises with it. Yes.
One end of a return spring 150 is connected to the base portions 32b and 53b of the fork cam 32 and the belt drive cam 53, and the other end of the return spring 150 is connected to the seedling mount 16 and the like, whereby the fork cam 32 and the belt. The drive cam 53 is always biased counterclockwise as viewed from the left side.

An insertion hole through which the second vertical feed shaft 31 is inserted is provided at a branch portion between the corresponding contact portion 32c and the welded portion 32d of the fork cam 32. As described above, the second vertical feed is inserted into the insertion hole. The shaft 31 is inserted, and the shaft-side flange 57 welded to the second longitudinal feed shaft 31 is bolted to the fork cam 32 so that the second longitudinal feed shaft 31 and the fork cam 32 are connected and fixed. ing.
With the above configuration, when the seedling stage 16 reciprocates in the vehicle width direction, the second vertical feed shaft 31, the fork cam 32, the belt drive shaft 33, the belt drive cam 53, and the like together with the seedling stand 16 are lateral feed shafts. The planting drive case 61, the longitudinal feed shaft 88, the push cam 91, and the traveling unit 1 reciprocate left and right relatively.

Next, the holding mechanism for the seedling mat will be described.
The seedling mat holding mechanism holds the seedling mat so as not to move with respect to the seedling mounting table 16 when the seedling feeding belt 92 is stopped, and the seedling mat holding mechanism 92 is configured to start the conveyance when the seedling feeding belt 92 shifts from the stopped state to the conveying state. The seedling mat is made movable before the seedling feeding belt 92 is driven, and the seedling feeding belt 92 is stopped after the driving of the seedling feeding belt 92 is stopped when the seedling feeding belt 92 is stopped from being conveyed. The mat is held immovably with respect to the seedling mount 16.

Specifically, as shown in FIGS. 5, 7, and 8, the seedling mat holding mechanism according to the present embodiment includes a seedling mat holding unit 110 that moves up and down, and a vertical movement that supports the seedling mat holding unit 110. The link mechanism 60 is configured to be disposed downstream of the seedling mount 16.
The seedling mat holding section 110 is composed of a plurality of bar-shaped seedling mat entry members 111, 111... And a horizontal shaft 113 laid horizontally in the vehicle width direction, and the seedling mat entry members 111, 111,. The upper ends (base portions) of the .. are joined to the horizontal shaft 113 by welding or the like, and are formed into a fork shape as a whole. The horizontal shaft 113 reciprocates in the vertical direction by the link mechanism 60 in accordance with the driving of the seedling feeding belt 92.
The link mechanism 60 includes a swing arm 41, a fulcrum frame 39, an action frame 40, the drive mechanism 15 and the like, and reciprocates the seedling mat holding portion 110 in the vertical direction.

The fulcrum frame 39 is erected on the upper surface in the vicinity of the middle part of the rib 16a, and the upstream end of the swing arm 41 is pivotally supported at the upper end of the fulcrum frame 39. The swing arm 41 has an upstream end pivotally supported by the upper end of the fulcrum frame 39 so as to be vertically rotatable, an upper end of the action frame 40 is pivotally supported at the middle, and a lower end of the swinging arm 41 holds the seedling mat. Fixed to one end of the horizontal shaft 113 of the portion 110. Specifically, as shown in FIG. 7, the downstream ends of the swing arms 41 and 41 and the end of the horizontal shaft 113 are both formed in a plate shape, and the plate portions 41b and 113b are fastened together with bolts or the like. Accordingly, the horizontal shaft 113 is horizontally mounted on the lower end portions of the swing arms 41.
The action frame 40 is a member having an upper end pivotally supported by a midway portion of the swing arm 41, and is disposed so as to slidably pass through the vicinity of the lower portion of the rib 16a. A U-shaped member 37 welded to the cam 32 is pivotally supported.

That is, the action frame 40 is moved up and down by the vertical movement of the U-shaped member 37, and the swinging arm 41 is rotated around the upper end of the fulcrum frame 39 by the vertical movement of the action frame 40. 110 is configured to rotate in the front-rear and up-down directions around the upper end of the fulcrum frame 39.
As described above, since the U-shaped member 37 moves up and down in accordance with the rotation of the fork cam 32, the seedling mat entry members 111, 111. It is configured to enter or be extracted.

  Here, in the planting device 4 of the present embodiment, the three action frames 40, 40, 40 are passed through the ribs 16 a, 16 a, 16 a and the lower ends thereof are loosely fitted onto the belt drive shaft 33. It is pivotally supported by the character members 37, 37, and 37. In other words, the remaining swing arms 41, 41, 41 on which the action frame 40 is not pivotally supported are supported directly on the swing arm 41 on which the action frame 40 is pivotally supported and move up and down.・ It is configured to move up and down indirectly via Accordingly, it is not necessary to provide a large number of working frames 40 or to provide a large number of holes for the working frames 40 in the ribs 16a, and the manufacturing process and the manufacturing cost can be reduced.

The seedling mat holding mechanism 100 having such a configuration operates as follows.
That is, as shown in FIGS. 5 to 8, while the seedling table 16 is moving between one moving end in the vehicle width direction and the other moving end, the fork cam 32 is not pushed. The moving cam 91 is not engaged. Here, since the return spring 150 urges the fork cam 32 and the belt drive cam 53 in the counterclockwise direction when viewed from the left side, it urges the action frame 40 in the direction of pulling downward. That is, in the planting apparatus 4 of a present Example, it is the structure urged | biased in the state (seedling mat holding | maintenance state) where the seedling mat penetration member 111 rushes into a seedling mat. In this embodiment, the return spring 150 is used. However, any urging member that urges the seed mat holding portion 110 directly or indirectly toward the holding state may be used. It is not limited to.
With the configuration described above, misalignment of the seedling mat is effectively prevented while the seedling mounting table 16 is moving.

  When the seedling stage 16 reciprocates in the left-right direction and reaches either left or right end, the fork cam is rotated by the rotation of either the left or right push cam 91 on the vertical feed shaft 88 that is constantly rotating. 32 is lifted. That is, the fork cam 32 rotates counterclockwise against the return spring 150 in the clockwise direction when viewed from the left side. When the fork cam 32 rotates, the second vertical feed shaft 31 and the U-shaped member 37 are lifted substantially upward as the fork cam 32 rotates. When the U-shaped member 37 is lifted, the action frame 40 is pushed upward, and as a result, the swing arm 41 is lifted. When the swing arm 41 is lifted, the horizontal shaft 113 fixed to the swing arm 41 is lifted rearward and upward, and as a result, the seedling mat entry member 111 is extracted from the seedling mat.

  In other words, when the seedling stage 16 reaches the moving end in the vehicle width direction, the fork cam 32 engages with the pushing cam 91, so that the fork cam 32 uses the belt drive shaft 33 as a fulcrum and the return spring 150 The action frame 40 is lifted against the urging force. The action frame 40 pivots the swing arm 41 counterclockwise as viewed from the left side about the upper end of the fulcrum frame 39, so that the seedling mat holding part 110 is shifted from the holding state to the releasing state.

When the fork cam 32 is further rotated and the second vertical feed shaft 31 is lifted in accordance with the rotation of the push cam 91, the second vertical feed shaft 31 is placed on the lower surface of the engagement portion 53c of the belt drive cam 53. The belt drive cam 53 rotates by engaging.
With this configuration, when the seedling stage 16 reaches the moving end in the vehicle width direction, the push cam 91 and the fork cam 32 are engaged, and the second vertical feed shaft 31 and the belt drive cam 53 are engaged. The belt drive shaft 33 rotates around the axis only while the two are engaged, and the seedling mat placed on the seedling placing table 16 is conveyed downward by a predetermined pitch by the seedling feeding belt 92. It has a configuration.

That is, since the fork cam 32 starts to rotate counterclockwise as viewed from the right side before the belt drive cam 53 rotates, the seedling mat holding portion 110 is opened before the belt drive shaft 33 starts to rotate. It is done. In other words, the seedling mat is conveyed downward by the seedling feeding belt 92 after the seedling mat entry members 111, 111... Are extracted from the seedling mat.
As described above, since the one-way clutch is interposed between the belt drive cam 53 and the belt drive shaft 33, the belt drive shaft 33 does not rotate in the reverse direction, and When the engagement with the second vertical feed shaft 31 is released by the biasing force of the return spring 150, the belt drive cam 53 is returned to the initial position.

When the push cam 91 further rotates, the engagement between the push cam 91 and the fork cam 32 is released. Then, the fork cam 32 and the belt drive cam 53 are rotated clockwise by the urging force of the return spring 150, and the seedling mat 92 is completely conveyed by the seedling feeding belt 92. Thereafter, the engagement between the second longitudinal feed shaft 31 and the belt drive cam 53 is released, and only the fork cam 32 and the U-shaped member 37 rotate. Accordingly, the action frame 40 is lowered, and the seedling mat entry members 111 and 111 are entered into the seedling mat. That is, after the seedling mat is conveyed by the seedling feeding belt 92, the seedling mat entry members 111 and 111 are configured to enter the seedling mat.
With the above configuration, the seedling mat is reliably conveyed by the seedling feeding belt 92 at the moving end in the vehicle width direction of the seedling mount 16.

Next, the positional relationship between the seedling mat holding unit 110 and the seedling dripping prevention plate 54 will be described.
As shown in FIGS. 7 and 8, in the planting device 4 of the present invention, the seedling mat entry member 111 is located downstream of the seedling hanging prevention plate 54 from the seedling hanging prevention plate 54, and the seedling mat is provided. The holding part 110 is configured to move up and down behind the rising part 46 d and the seedling prevention plate 54.
Specifically, as shown in FIG. 8, the seedling mat entry member 111 is disposed so as to be positioned on the side of the arrow X direction from the seedling hanging prevention plate 54 laid horizontally on the rising portion 46 d. The seedling tip is supported by the seedling droop prevention plate 54.

Specifically, the seedling mat entry member is adjusted by adjusting the location of the fulcrum frame 39 fixed to the rib 16a or by adjusting the length of the swing arm 41 pivotally supported by the fulcrum frame 39. 111, 111... Can be adjusted.
For example, by moving the placement position of the fulcrum frame 39 to the downstream side of the rib 16a, the placement position of the seedling mat entry members 111, 111... Can be moved in the direction of the arrow X. .. Can be moved in the direction opposite to the arrow X by reducing the length of the moving arm 41.

  In this manner, the seedling mat 4 placed on the seedling placing stand 16 is pressed by the seedling mat presser 46 and is conveyed downward by the seedling feeding belt 92, and the seedling mat 4 includes the seedling mat 4 A seedling mat piercing member 111, 111... Whose tip is plunged into the seedling mat, a horizontal shaft 113 that supports the base of the seedling mat piercing member 111, 111. A swinging arm 41 having a horizontal shaft 113 fixed thereto and rotating in conjunction with the operation of the seedling feeding belt 92, and a seedling prevention plate 54 fixed to the seedling mat holder 46 in the width direction. Since the seedling mat entry members 111, 111,... Are disposed downstream of the seedling dripping prevention plate 54, the seedlings on the seedling mat droop downstream of the seedling mount 16 by the seedling dripping prevention plate 54. That can prevent the seedling mat entry member 11 - 111 ... entrainment and crushing seedlings tip by vertical movement of the like can be prevented. In addition, even when the length of the seedling mat entry members 111, 111,... Is configured to be shorter than the length of the seedling, the horizontal axis or the like can be prevented from interfering with the seedling droop prevention plate.

As shown in FIG. 8, in the planting device 4 of the present invention, when the seedling mat holding part 110 is lowered and the seedling mat entry member 111 enters the seedling mat (the seedling mat holding state), the seedling mat is entered. The distance from the upper end of the members 111, 111... To the seedling mounting table 16 is configured to be longer than the distance from the lower end of the seedling hanging prevention plate 54 to the seedling mounting table 16.
That is, in the left side view, the lower end of the seedling droop prevention plate 54 is configured to be shifted from the upper end of the seedling mat entry member 111 at the time of entry in the arrow Y direction in FIG.
In other words, the height from the seedling mounting base 16 with the seedling mounting base 16 as a reference plane is lower than the upper end of the seedling mat entry members 111, 111. The lower end of the prevention plate has a lower configuration.

  Specifically, by changing the distance from the fulcrum frame 39 to the action frame 40, the rotation width of the swing arm 41, that is, the vertical movement width of the horizontal shaft 113 can be adjusted. That is, in order to increase the vertical movement of the seedling mat entry members 111, 111..., The distance from the fulcrum frame 39 to the action frame 40 is configured to be short, and conversely, the seedling mat entry members 111, 111 are configured. In order to make the vertical movement small, the distance from the fulcrum frame 39 to the action frame 40 should be long.

Then, by adjusting the length of the action frame 40, the height of the seedling mat entry members 111, 111... In the state of being stabbed into the seedling mat (the seedling mat holding state), that is, the seedling mat entering the seedling mat holding state. The upper end position of the members 111, 111... Can be adjusted.
That is, in order to shorten the distance between the upper ends of the seedling mat entry members 111 and 111 when the seedling mat entry members 111 and 111 enter the seedling mat and the seedling mounting table 16, the length of the action frame 40 is reduced. On the other hand, in order to increase the distance between the upper ends of the seedling mat entry members 111 and 111 and the seedling mount 16 at the time of entry, the length of the action frame 40 may be increased.

  Thus, since the lower end of the seedling prevention plate 54 is configured to be located closer to the mounting surface 92 of the seedling mounting table 16 than the upper ends of the seedling mat entering members 111, 111. When the horizontal shaft 113 moves up and down, it is possible to prevent the seedling from being sandwiched between the horizontal shaft 113 and the seedling droop prevention plate 54, and to prevent the seedling before planting from being damaged.

The side view which shows one Example of the riding rice transplanter carrying the planting apparatus of this invention. FIG. The rear perspective view which shows one Example of the planting apparatus of this invention. Similarly front view. The front perspective view which shows the planting apparatus lower part. The expansion front perspective view which shows the drive mechanism of a seedling feeding belt. The rear perspective view which shows the support structure of a rocking | fluctuating arm. The partial cross section left view which shows the positional relationship of a seedling droop prevention board and a seedling mat entrant member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 4 Planting device 16 Seedling stand 32 Fork cam 37 U-shaped member 39 Support frame 40 Action frame 41 Oscillating arm 46 Seedling mat presser 46d Standing part 53 Belt drive cam 54 Seedling droop prevention plate 92 Seedling feed belt 111 Seedling mat entry member 113 Horizontal axis

Claims (2)

A planting device configured to convey a seedling mat placed on a seedling placing table downward by a seedling feeding belt while being pressed by a seedling mat press,
A seedling mat piercing member whose tip is plunged into the seedling mat, a horizontal axis that supports the base of the seedling mat piercing member, and a horizontal axis that is fixedly provided on the lower portion of the seedling mounting base. A swing arm that rotates in conjunction with the movement,
A seedling hanging prevention plate is fixed to the seedling mat presser in the width direction,
A planting apparatus, wherein the seedling mat entry member is disposed downstream of the seedling dripping prevention plate.   The planting apparatus according to claim 1, wherein a lower end of the seedling prevention plate is positioned closer to a placement surface of the seedling platform than an upper end of the seedling mat entry member at the time of entry.

Images