JP2007236284A - Seedling mat-holding mechanism of rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling mat-holding mechanism while allowing that the seedling mat is conveyed in lower direction, capable of preventing the position gap of the seedling mat under transplanting work effectively and surely conveying the seedling to a transplanting claw. <P>SOLUTION: This constitution of the seedling-holding mechanism equipped with a seedling mat-presser 46 pressing the seedling mat from upper direction in the seedling-loading stage 16 constituted as capable of conveying the seedling mat loaded on the seedling-loading stage 16 in lower direction by a seedling-sending belt and supported by the seedling-loading stage so as to be able to take a holding state of holding the seedling mat by thrusting into the seedling mat and an opening state of leaving from the seedling mat is provided by constituting the seedling mat-holding mechanism with a seedling mat-thrusting part, swinging arm and link member and installing a multiple number of engaging positions of the swinging arm with the link member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to the technology of a rice transplanter, and more particularly to the technology of a seedling mat support mechanism of a rice transplanter.

Conventionally, in a seedling stage configured to convey a seedling mat placed on a seedling stage by a seedling feeding belt, a seedling feeding roller, or the like, in order to prevent misalignment or lifting of the seedling mat, The technology of the rice transplanter provided with the seedling mat presser always energized in the direction along the placement surface of the seedling placing table is known (see Patent Document 1).
JP 2004-141097 A

  However, since the seedling mat placed on the seedling stage is conveyed downward by the seedling feeding belt, the urging force of the seedling mat presser is within a range that allows the seedling mat to be conveyed downward by the seedling feeding belt. As a result, the seedling mat may fall off due to vibrations during traveling of the rice transplanter, resulting in variations in the number of seedlings. On the other hand, if the urging force is too large, the seedling mat is not transported to the planting nail, and this causes a lack of stock when the planting nail scrapes off the seedling.

  Therefore, in view of such a problem, the present invention effectively prevents the misalignment of the seedling mat during the planting operation while allowing the seedling mat to be conveyed downward, and reliably conveys the seedling to the planting nail. Provided is a seedling mat support mechanism that can be used.

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

  That is, according to claim 1, a seedling mat presser for holding the seedling mat from above is provided in the seedling mounting table configured to be able to convey the seedling mat placed on the seedling mounting table by the seedling feeding belt. In a configuration comprising a seedling mat support mechanism supported by a seedling stage so as to be able to take a holding state that enters the seedling mat and holds the seedling mat, and an open state separated from the seedling mat, A seedling mat support mechanism for a rice transplanter, wherein the seedling mat support mechanism includes a seedling mat entry portion, a swing arm, and a link member, and a plurality of engagement portions between the swing arm and the link member are provided.

  According to a second aspect of the present invention, a plurality of engagement portions of the seedling mat entry portion and the interlocking arm of the seedling mat support mechanism are provided.

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

  In Claim 1, according to the thickness and hardness of a seedling mat, the movable range of a seedling mat support mechanism can be easily changed as appropriate, so that it can be applied to various types of seedling mats.

  According to the second aspect, the holding position of the seedling mat support mechanism can be easily changed as appropriate according to the thickness and hardness of the seedling mat, so that it can be applied to various types of seedling mats.

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 a support structure of the swing arm 41, FIG. 8 is a rear perspective view of a coupling portion between the action frame 40 and the swing arm 41, and FIG. It is a partial cross section left view which shows the positional relationship of the seedling mat support mechanism 100.

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 the seedling mount 16, planting claws 17, 17, center float 34, side float 35, seedling mat presser 46, seedling feeding belt 92, seedling mat support mechanism 100, etc. 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 that is operatively connected to a PTO shaft (not shown) disposed 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 93 is disposed substantially upstream and downstream of the seedling mounting table 16 so as to be substantially flush with 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 is connected to 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. It is wound around the endless 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 fitted on the belt drive shaft 33. 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.
The lower end portion of the action frame 40 other than the belt drive portion is welded to a loose fitting member (not shown) composed of 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.

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 seedling mat support mechanism 100 will be described.
The seedling mat support mechanism 100 holds the seedling mat so that it cannot move with respect to the seedling mount 16 when the seedling feeding belt 92 is stopped, and when the seedling feeding belt 92 starts to be transferred from the stopped state to the conveying state. After the seedling mat is made movable before the seedling feeding belt 92 is driven, and when the seedling feeding belt 92 is stopped from being transported to the stop state, the driving of the seedling feeding belt 92 is stopped. The seedling mat is held immovably with respect to the seedling mount 16.

Specifically, as shown in FIGS. 5, 7, and 8, the seedling mat support mechanism 100 according to the present embodiment includes a seedling mat support portion 110 that moves up and down, and supports the seedling mat support portion 110 to move up and down. It is comprised from the link mechanism 60 to move, and is arrange | positioned in the downstream part of the seedling mounting stand 16. FIG.
The seedling mat support part 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 support 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 portion thereof. 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 in the middle, and a lower end is supported by 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 about 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 support 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 seedling mat support 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.

  Then, when the seedling stage 16 reciprocates in the left-right direction and reaches one of the left and right ends, the fork cam is rotated by the left-right rotation of the push cam 91 on the vertical feed shaft 88 that is always 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 rotates 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 support 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 support 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 mounting structure of the action frame 40 and the swing arm 41 will be described.
As described above, the action frame 40 is a member whose upper end is pivotally supported in the middle of the swinging arm 41 and is disposed so as to be slidable in the vicinity of the lower portion of the rib 16a. A lower end portion is pivotally supported by a U-shaped member 37 welded to the fork cam 32.
At the upper position on the other end side of the working frame 40, a plurality (three in this embodiment) of connecting holes 40b for connecting (or engaging) with the swing arm 41 are arranged in the longitudinal direction (up and down) with a predetermined interval. Direction). On the other hand, a plurality of connecting holes 41c for connecting (or engaging) with the action frame 40 are also provided in the longitudinal middle part of the swing arm 41 in the longitudinal direction (front-rear direction). Then, one of each of the plurality of connection holes 40b and the connection hole 41c is selected and pivotally connected by a pin 120 or the like. However, the connection hole may be provided only in one of the action frame 40 and the swing arm 41.

  The structure for adjusting the pivot position in the front-rear direction or the vertical direction is not limited, and instead of providing a plurality of connection holes in the longitudinal direction of the action frame 40 or the swing arm 41, a long hole is opened, A configuration may be adopted in which a pivot shaft is inserted into the elongated hole to fix a bolt or the like, and the other frame or the end of the arm is pivotally supported on the pivot shaft. Alternatively, it is constituted by a rod instead of a frame or an arm, a pipe is slidably fitted onto the rod, and the pipe can be fixed with a bolt or the like, and the end of the other frame or arm is attached to the pipe. You may be the structure which pivots a part.

  In this way, by configuring the pivot position of the action frame 40 and the swing arm 41 so as to be adjustable (changeable), for example, when the earth pressure of the seedling mat is low, or the soil portion of the seedling mat is thick. In some cases, the seedling mat entry member 111 is more reliably held and sent when the seedling mat entry member 111 is entered to a deep position of the seedling mat. By engaging the connection hole close to the fork cam 32 in the connection hole 40b of the action frame 40 or engaging the connection hole close to the fulcrum frame 39 in the connection hole 41c of the swing arm 41, The mat entry member 111 can enter the seedling mat deeply.

  On the other hand, when the seedling mat entry member 111 has to be plunged into a shallow position of the seedling mat because the soil pressure of the seedling mat is high or the seedling mat is thin, the above-described connection hole 40b of the action frame 40 is By engaging the connecting hole far from the fork cam 32 or by engaging the connecting hole 41c of the swing arm 41 which is far from the fulcrum frame 39, the seedling mat entry member 111 enters the seedling mat shallowly. It becomes possible.

Next, the mounting structure of the support member 113 and the swing arm 41 that support the entry member 111, which is a main part of the present invention, will be described.
The swing arm 41 is provided with connecting holes 41d at a plurality of places (two places in this embodiment) at predetermined intervals in the longitudinal direction (front-rear direction) at the end on the support member side. The support member 113 at the upper end of the seedling mat entry member 111 can be fixed to the connection hole 41d with a screw or the like.
In this way, the support member 113 that supports the entry member 111 is configured to be attached to the swing arm 41 so that the position of the support member 113 can be adjusted in the longitudinal direction, so that the entry depth of the seedling mat entry member 111 and the moment at the time of entry are increased. Can be changed. For example, when the seedling mat has a low earth pressure or the seedling mat 200 is thick, the seedling mat entry member 111 must be inserted to a deep position of the seedling mat. By engaging with the connecting hole close to 39, the seedling mat entry member 111 can penetrate deeply into the seedling mat.

  On the other hand, if the seedling mat entry member 111 has to be plunged into a shallow position of the seedling mat because the seedling mat has a high earth pressure or the seedling mat is thin, the coupling hole 42d is closer to the fulcrum frame 39. By engaging with the holes, the seedling mat entry member 111 can be entered into the seedling mat shallowly. In this case, since the moment when the seedling mat entry member 111 enters increases, it is possible to enter the seedling mat having a high earth pressure.

  In order to obtain the same effect as in the present embodiment, instead of providing the plurality of connecting holes 42d, similarly to the above, long holes are provided in the longitudinal direction to fix the seedling mat entry member 111 at a desired position, The moving arm 41 may be constituted by a rod, and the base part of the seedling mat entry member 111 may be constituted by a pipe and fixed at an arbitrary position. Further, a pipe that opens in the vertical direction (perpendicular to the longitudinal direction of the swing arm 41) is fixed to the tip of the swing arm 41, and the base of the seedling mat entry member 111 is inserted into the pipe and fixed with a bolt or the like. It can also be configured. Thus, the length can be easily adjusted even when the seedling mat entry member 111 is shortened due to wear or the like.

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 rear perspective view of the coupling | bond part of an action frame and a rocking | fluctuating arm. The partial cross section left view which shows the positional relationship of a seedling mat presser and a seedling mat support mechanism.

Explanation of symbols

4 planting device 16 seedling table 32 fork cam 37 U-shaped member 39 fulcrum frame 40 action frame 40b connection hole 41 swing arm 41c connection hole 46 seedling mat presser 46d rising part 54 seedling droop prevention plate 53 belt drive cam 92 seedling feed Belt 111 Seedling mat entry member 113 Horizontal axis

Claims (2)

In the seedling mounting table configured to be able to convey the seedling mat placed on the seedling mounting table by the seedling feeding belt, the seedling mat presser that holds the seedling mat from above is provided and enters the seedling mat. In a configuration comprising a holding state for holding the seedling mat and a seedling mat support mechanism supported by the seedling stage so as to be able to take an open state separated from the seedling mat,
A seedling mat support mechanism for a rice transplanter, wherein the seedling mat support mechanism includes a seedling mat entry portion, a swing arm, and a link member, and a plurality of engagement portions between the swing arm and the link member are provided. The seedling mat support mechanism of the rice transplanter according to claim 1, wherein a plurality of engagement portions of the seedling mat entry portion and the interlocking arm of the seedling mat support mechanism are provided.