CN111108871B

CN111108871B - Seedling planting device

Info

Publication number: CN111108871B
Application number: CN201911317329.XA
Authority: CN
Inventors: 田部智也
Original assignee: Kubota Corp
Current assignee: Kubota Corp
Priority date: 2014-05-22
Filing date: 2015-03-31
Publication date: 2022-07-22
Anticipated expiration: 2035-03-31
Also published as: JP6253510B2; CN105075470B; CN111108871A; JP2015221006A; CN105075470A

Abstract

A seedling planting device is provided with a plurality of moving rotating bodies which guide a seedling carrying platform (12) to move in the left-right direction in a state that the seedling carrying platform is arranged on a supporting member (68) at a specified interval in the left-right direction, a limiting part (93) is arranged on the seedling carrying platform (12) in a state of being positioned between the left-right directions of the plurality of moving rotating bodies (75), the limiting part allows the seedling carrying platform (12) to move in the left-right direction and limits the floating of the seedling carrying platform (12) relative to the supporting member (68), and the limiting part (93) is composed of a locking member (94) which stretches in the up-down direction across the seedling carrying platform (12) and the supporting member (68) and limits the floating of the seedling carrying platform (12). The present invention can improve durability of a structure for preventing a seedling stage from floating, and can reduce cost by simplifying the structure.

Description

Seedling planting device

The application is a divisional application of the following applications:

application date of the original application: 31/03/2015

Application No. of the original application: 201510148478.3

The invention name of the original application: seedling planting device

Technical Field

The present invention relates to a seedling planting device equipped in a riding type rice transplanter or a walking type rice transplanter.

Background

The conventional seedling planting device has a structure as follows.

That is, the seedling stage is provided with a plurality of moving rotating bodies at appropriate intervals on a support member extending in the left-right direction and receiving and supporting the seedling stage from below, and the seedling stage is guided by the moving rotating bodies so as to be movable in the left-right direction. The tray for connecting the rotating body for movement and the support member has a regulating portion for preventing the seedling stage from floating. The regulating portion is configured to support a regulating roller, which is rotatably supported about an axis along a direction intersecting with a longitudinal seedling feeding direction, on a support arm coupled to the bracket so as to be displaced in a lateral direction from the moving rotating body. Further, the seedling support has a guide rail at a lower end portion thereof, the guide rail is formed with a concave groove into which the regulating roller is engaged, and the seedling support is prevented from floating by contact between the regulating roller and the guide rail (for example, see patent document 1).

In a conventional seedling planting device, a seedling stage includes: a main seedling stage having a plurality of seedling loading sections; an end seedling carrier which is freely divided left and right relative to the transverse side end part of the main seedling carrier in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling-carrying platform is supported in a storage supporting state overlapped on the surface side of the main seedling-carrying platform. The connection support device further includes: a sliding guide part arranged on the back side of the main seedling carrying platform; and a support arm that is guided and supported to be relatively movable in the left-right direction with respect to the slide guide portion, and that is configured to be slidable and liftable. Specifically, the structure is as follows: the support shaft on the support arm side is inserted into an elongated hole formed in the slide guide portion, and the slide operation is performed, and the structure is such that: in a state where the slide operation portion is slid to the outermost side, the posture is maintained in a state where the long hole is engaged with the support shaft, and a state where the end portion of the slide guide portion is in contact with and restricted by the end portion of the support arm in a narrow area (for example, see patent document 1).

In a conventional seedling planting device, a seedling stage includes: a main seedling carrying platform with a plurality of seedling carrying parts; an end seedling carrier which is freely divided left and right relative to the transverse side end part of the main seedling carrier in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling carrying platform is supported in a storage and support state of overlapping on the surface side of the main seedling carrying platform. The coupling and supporting device further includes: a sliding guide part arranged on the back side of the main seedling carrying platform; and a support arm that is guided and supported so as to be relatively movable in the left-right direction with respect to the slide guide portion, and that is configured to be slidable and liftable. Specifically, the structure is such that: the sliding guide part has a guide surface which is contacted with the upper and lower sides of the supporting arm and can freely slide and guide, the guide surface at the upper and lower sides is contacted with the upper and lower sides of the supporting arm, the horizontal posture of the supporting arm is maintained, the downward hanging is prevented, and the sliding guide part can freely slide and guide, and the structure is as follows: the support arm is rotatable in a state where the slide operation portion slides to the outermost side without a guide function of the upper guide surface (for example, see patent document 1).

Patent document 1: japanese patent laid-open publication No. 2013-208082

Disclosure of Invention

Problems to be solved by the invention

In the conventional structure, since the restricting roller and the guide rail are always in contact with each other in the restricting portion for preventing the seedling stage from floating, the restricting roller and the guide rail are easily worn out as the seedling stage is reciprocally driven in the lateral direction, and thus the durability is deteriorated. In addition, in the above-described conventional structure, since the load of the seedling support base is applied in a cantilever shape to the support shaft for supporting the regulating roller, the support structure needs to be made firm, and the regulating roller using an abrasion resistant material needs to be used, which has disadvantages of complicated structure and high cost.

Therefore, it is desired to improve durability of a structure for preventing the seedling platform from floating, and to reduce cost by simplifying the structure.

In the above-described conventional structure, the seedling support is provided as a coupling support device which is dividable into a main seedling support and an end seedling support and which is switchable between a connected state in the working posture and a stored and supported state, and the seedling support device includes a support arm which is guided and supported so as to be relatively movable in the left-right direction with respect to a slide guide portion provided on the back side of the main seedling support, and which is configured to be slidable and erectable.

Further, in the conventional structure, in a state where the slide operation portion is slid to the outermost side, the posture is maintained in a state where the elongated hole is engaged with the support shaft, and in a state where the end portion of the slide guide portion is abutted against and restricted by the end portion of the support arm in a narrow area.

Therefore, in a configuration in which the seedling stage is provided with a connecting and supporting device which is dividable into a main seedling stage and an end seedling stage and which is switchable between a connected state in the working posture and a stored and supported state, it is desirable to make the lateral width of the seedling stage as compact as possible when the end seedling stage is in the stored posture and to reliably maintain the posture in a state in which the support arm projects laterally outward.

In the above-described conventional structure, since the sliding operation is performed in a state where the support shaft on the support arm side is inserted into the elongated hole formed in the slide guide portion as described above, the sliding resistance between the support shaft and the inner edge of the elongated hole is large, and the sliding operation is difficult to be easily performed, and there is a possibility that torsion occurs. Further, the guide plates on both upper and lower sides are brought into contact with both upper and lower sides of the support arm, and slidably guide the support arm while maintaining the horizontal posture of the support arm to prevent a change in posture.

Therefore, it is desired that the sliding operation be performed easily while the horizontal posture of the support arm is maintained to prevent the posture change, and that the structure be simple and the assembly workability be not easily deteriorated.

Means for solving the problems

The seedling planting device of the invention has the structural characteristics that the 1 st structure is characterized in that:

a seedling carrying platform for carrying and placing the planting seedlings;

a support member extending in the left-right direction and receiving and supporting the seedling stage from below;

a plurality of moving rotating bodies which guide the seedling stage to be movable in the right-left direction; and

a restricting unit that allows the seedling stage to move left and right and restricts floating up of the seedling stage with respect to the support member,

the plurality of moving rotating bodies are provided on the support member in a state of being arranged at a predetermined interval in a left-right direction,

the restricting section is provided on the seedling stage so as to be positioned between the plurality of moving rotating bodies in the left-right direction, and is configured by a locking member which extends in the up-down direction across the seedling stage and the support member and restricts floating-up of the seedling stage,

wherein all of the moving rotating bodies are maintained in a state of being positioned between the lower side of the seedling carrier and the support member and supporting the lower side of the seedling carrier while the seedling carrier is reciprocated in the left-right direction, and the regulating section is maintained in a state of being positioned between the plurality of moving rotating bodies while the seedling carrier is reciprocated in the left-right direction,

a rotary body for limiting sinking in a direction crossing a seedling feeding direction of the seedling carrying platform is arranged on one of the seedling carrying platform and the supporting component,

a covering portion for covering an upper portion of the sinking restricting rotary body is provided on the other of the seedling support and the support member, and the locking member is fixed to the covering portion,

the seedling stage has a plate with excellent abrasion resistance at a portion thereof which is in contact with the moving rotating body.

With this configuration, the seedling stage is smoothly guided in the lateral direction by the plurality of moving rotating bodies provided on the support member. In addition, the seedling support is restrained from floating up by a restraining portion provided between the plurality of moving rotating bodies in the lateral direction.

In this way, the restriction portion is positioned between the plurality of rotating bodies for movement in the lateral direction, so that the plurality of rotating bodies for movement and the member on the seedling stage side that is in contact with the plurality of rotating bodies for movement and is roll-guided are separated from each other, and the rotating bodies for movement can be continuously and satisfactorily guided in an unfavorable state such as derailment.

Since the restricting portion is constituted by the locking member which extends in the vertical direction so as to straddle the seedling stage and the support member and restricts the floating of the seedling stage, it is only necessary to restrict the relative displacement in the vertical direction between the seedling stage and the support member, and it is possible to cope with this with a simple structure. Further, the locking member may be configured to restrict relative displacement of the seedling support and the support member by a predetermined amount or more, and the locking member does not need to be slid all the time when the seedling support moves laterally, so that there is little possibility of abrasion and durability is excellent.

Therefore, the durability of the structure for preventing the seedling stage from floating can be improved, and cost reduction can be achieved by simplifying the structure.

With this configuration, during the reciprocating movement of the seedling stage in the left-right direction, all the moving rotating bodies maintain the state of being positioned between the lower side of the seedling stage and the support member and supporting the lower side of the seedling stage, and therefore, the seedling stage that moves in the lateral direction can be stably supported without play. Further, since the restricting portion maintains the state of being positioned between the plurality of moving rotating bodies while the seedling support is reciprocated in the left-right direction, the floating of the seedling support can be effectively restricted regardless of the position of the seedling support.

With this configuration, since the rotation body for restricting sinking is provided on one of the seedling support and the support member, even if the seedling for planting is placed on the seedling support and a load acts on the seedling support, the seedling support can smoothly roll and the sinking of the seedling support in the direction intersecting the seedling feeding direction can be restricted. Further, since the other of the seedling support and the support member has the covering portion for covering the upper portion of the rotation body for controlling submergence, even if soil is scattered along with the seedling planting work, the soil can be prevented from falling onto the rotation body for controlling submergence.

Further, since the locking member is fixed by the covering portion, the locking member can be supported by a simple structure without complicating the structure in which a dedicated fixing member or the like for fixing the locking member is provided.

With this configuration, since the portion of the seedling stage that the movable rotating body contacts has the plate having excellent wear resistance, even if the seedling stage is repeatedly moved in the lateral direction, the portion of the seedling stage that the movable rotating body contacts can be prevented from being worn in a short time, and a good seedling planting operation can be performed for a long period of time.

The seedling planting device of the invention has the structural characteristics that:

a seedling carrying platform for carrying and placing the planting seedlings;

a plurality of moving rotating bodies which guide the seedling stage to be movable in a left-right direction; and

a restricting unit that allows the left-right movement of the seedling stage and restricts the floating of the seedling stage with respect to the support member,

the restricting unit is provided on the seedling stage so as to be positioned between the plurality of moving rotating bodies in the lateral direction, and is constituted by a locking member which extends in the vertical direction across the seedling stage and the support member and restricts the floating of the seedling stage,

the other of the seedling support and the support member has a covering portion for covering an upper portion of the rotation body for controlling sinking, and the locking member is fixed to the covering portion.

With this configuration, the seedling support is smoothly moved and guided in the left-right direction by the plurality of moving rotating bodies provided on the support member. In addition, the seedling support is restrained from floating up by a restraining portion provided between the plurality of moving rotating bodies in the lateral direction.

In this way, the restriction portion is positioned between the plurality of moving rotating bodies in the lateral direction, so that the moving guide can be continued satisfactorily in an unfavorable state such as a derailment of the moving rotating bodies due to separation between the plurality of moving rotating bodies and the member on the seedling stage side which is in contact with the plurality of moving rotating bodies and is roll-guided.

Since the regulating portion is constituted by the locking member which extends in the vertical direction across the seedling stage and the support member and regulates the floating of the seedling stage, it is only necessary to regulate the relative displacement in the vertical direction between the seedling stage and the support member, and it is possible to cope with this with a simple structure. Further, the locking member may be configured to restrict relative displacement of the seedling stage and the support member by a predetermined amount or more, and the seedling stage does not need to be slid all the time when moving laterally, so that the possibility of abrasion is small, and durability is good.

With this configuration, during the reciprocating movement of the seedling stage in the right-left direction, all the moving rotating bodies maintain the state of being positioned between the lower side of the seedling stage and the support member and supporting the lower side of the seedling stage, and therefore, the seedling stage that moves in the lateral direction can be stably supported without rattling. Further, since the restricting unit maintains the state of being positioned between the plurality of the moving rotating bodies while the seedling support reciprocates in the left-right direction, the floating of the seedling support can be effectively restricted regardless of the position of the seedling support.

With this configuration, since the rotation body for restricting sinking is provided on one of the seedling support and the support member, even if the seedling for planting is placed on the seedling support and a load acts on the seedling support, the seedling support can smoothly roll and the sinking of the seedling support in the direction intersecting the seedling feeding direction can be restricted. Further, since the other of the seedling support base and the support member has the covering portion for covering the upper side of the rotation body for controlling sinking, even if soil is scattered along with the seedling planting work, the soil can be prevented from falling onto the rotation body for controlling sinking.

The 3 rd structural feature of the seedling planting device of the invention is, have:

a seedling carrying platform for carrying and placing the planting seedlings;

the other of the seedling stage and the support member has a covering portion for covering an upper portion of the immersion limiting rotating body.

Therefore, the structure for preventing the seedling stage from floating can improve the durability, and the cost can be reduced by simplifying the structure.

With this configuration, during the reciprocating movement of the seedling stage in the left-right direction, all the moving rotating bodies maintain the state of being positioned between the lower side of the seedling stage and the support member and supporting the lower side of the seedling stage, and therefore, the seedling stage that moves in the lateral direction can be stably supported without play. Further, since the restricting unit maintains the state of being positioned between the plurality of the moving rotating bodies while the seedling support reciprocates in the left-right direction, the floating of the seedling support can be effectively restricted regardless of the position of the seedling support.

With this configuration, since the rotation body for restricting the sinking is provided on one of the seedling support and the support member, even if the seedling for planting is placed on the seedling support and a load acts on the seedling support, the seedling support can smoothly roll and the sinking of the seedling support in the direction intersecting the seedling feeding direction can be restricted. Further, since the other of the seedling support and the support member has the covering portion for covering the upper portion of the rotation body for controlling submergence, even if soil is scattered along with the seedling planting work, the soil can be prevented from falling onto the rotation body for controlling submergence.

The 4 th structural feature of the seedling planting device of the invention is that:

a seedling carrying platform for carrying and placing the planting seedlings;

the control unit may control the movement of the seedling stage to be performed in a state where the control unit controls the movement of the seedling stage to be performed in the horizontal direction, and may control the movement of the seedling stage to be performed in a state where the control unit controls the movement of the seedling stage to be performed in the horizontal direction.

Since the restricting portion is constituted by the locking member which extends in the vertical direction so as to straddle the seedling stage and the support member and restricts the floating of the seedling stage, it is only necessary to restrict the relative displacement in the vertical direction between the seedling stage and the support member, and it is possible to cope with this with a simple structure. Further, the locking member may be configured to restrict relative displacement of the seedling stage and the support member by a predetermined amount or more, and the seedling stage does not need to be slid all the time when moving laterally, so that the possibility of abrasion is small, and durability is good.

The 5 th structural feature of the seedling planting device of the present invention is that:

a seedling carrying platform for carrying and placing the planting seedlings;

the plurality of moving rotating bodies are arranged on the seedling carrier in a state of being spaced apart from each other at a predetermined interval in the left-right direction,

the restricting section is provided on the support member so as to be positioned between the plurality of moving rotating bodies in the lateral direction, and is constituted by a locking member which extends in the vertical direction across the seedling support and the support member and restricts the floating of the seedling support,

the control unit may control the movement of the seedling support member to move the seedling support member in a direction in which the movement of the seedling support member is stopped, and may control the movement of the seedling support member in a direction in which the movement of the seedling support member is stopped.

With this configuration, the seedling stage is smoothly guided in the left-right direction with respect to the support member by the plurality of moving rotating bodies provided on the seedling stage. In the support member, the floating of the seedling support is restricted by the restricting portion disposed between the plurality of moving rotating bodies in the left-right direction.

In this way, the restriction portion is positioned between the plurality of moving rotating bodies in the lateral direction, so that the moving guide can be continued satisfactorily in an unfavorable state such as a derailment of the moving rotating bodies due to the separation between the plurality of moving rotating bodies and the member on the side of the support member that is in contact with the plurality of moving rotating bodies and is guided by rolling.

The 6 th structural feature of the seedling planting device of the present invention is that:

a seedling carrying platform for carrying and placing seedlings for planting;

the plurality of moving rotating bodies are provided on one of the seedling stage and the support member in a state of being arranged at a predetermined interval in a left-right direction,

the restricting section is provided on the other of the seedling support and the support member in a state of being positioned between the plurality of moving rotating bodies in the lateral direction, and is configured by a locking member that extends in the vertical direction across the seedling support and the support member and restricts the floating of the seedling support,

With this configuration, the seedling support is smoothly moved and guided in the left-right direction by the plurality of moving rotating bodies provided on one of the seedling support and the support member. The floating of the seedling support is restricted by a restricting portion provided between the plurality of moving rotating bodies in the left-right direction on the other of the seedling support and the support member.

In this way, the restricting portion is positioned between the plurality of moving rotary bodies in the lateral direction, and therefore, the moving rotary bodies can be continued to be guided satisfactorily in an unfavorable state such as a situation where the plurality of moving rotary bodies and the opposite side member to be rollingly guided, which is in contact with the plurality of moving rotary bodies, are separated from each other and the moving rotary bodies are derailed.

The 7 th structural feature of the seedling planting device of the present invention is that:

a seedling carrying platform for carrying and placing seedlings for planting;

the restricting portion is provided on the other of the seedling support and the support member in a state of being positioned between the plurality of moving rotating bodies in the lateral direction, and is configured by a locking member that extends in the vertical direction across the seedling support and the support member and restricts the floating of the seedling support.

With this configuration, the seedling stage is smoothly guided in the lateral direction by the plurality of moving rotating bodies provided on one of the seedling stage and the support member. The other of the seedling support and the support member is restricted from floating up by a restriction portion provided between the plurality of moving rotating bodies in the lateral direction.

In this way, the restriction portion is positioned between the plurality of rotating bodies for movement in the lateral direction, and therefore, the moving rotating bodies can be continued to be guided satisfactorily in a disadvantageous state such as a derailment of the moving rotating bodies due to separation between the plurality of rotating bodies for movement and the other member to be guided in rolling contact with the plurality of rotating bodies for movement.

The 8 th structural characteristic of the seedling planting device of the invention is that,

a seedling carrying platform for carrying seedlings for planting comprises: a main seedling stage having a plurality of seedling loading sections; an end seedling carrier which is freely divided left and right relative to the transverse side end part of the main seedling carrier in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling stage is supported in a storage support state overlapped on the surface side of the main seedling stage,

the connection support device includes: a slide guide part arranged on the back side of the main seedling carrying platform; and a support arm having one end side connected to the end seedling stage and the other end side guided and supported to be movable in the left-right direction relative to the slide guide,

the support arm has: a laterally moving arm portion that slidably moves along the slide guide portion; a seesaw arm portion which is connected to a lateral outer end portion of the lateral movement arm portion and which is changeable in posture into an extended posture in which the seesaw arm portion extends along an extension direction of the lateral movement arm portion and a bent posture in which the seesaw arm portion stands up toward a front surface side of the main seedling support with respect to the lateral movement arm portion; and a posture holding unit that restricts a posture variation of the heave swing arm unit in the extension posture,

the heave swing arm portion is supported swingably about a swing axis in a vertical direction with respect to the traverse arm portion in a state in which a posture thereof is changeable to the stretching posture and the bending posture,

the posture maintaining section is configured by a gap filling member that fills a gap between the seesaw arm section and the lateral movement arm section so as to receive and restrict a posture change of the seesaw arm section in the extended posture to a back surface side of the seedling support.

With this structure, the support arm has: a lateral moving arm part sliding along the sliding guide part; and a seesaw swinging arm portion connected to the lateral outer end portion of the lateral moving arm portion, and configured to be changeable in posture into an extended posture pulled laterally outward and a bent posture standing up, so that the swinging axial center position of the support arm can be set at an arbitrary position without being restricted by the position of the lateral outer end portion of the slide guide portion. As a result, the position of the lateral outer end of the slide guide portion does not need to be extended to the lateral outside of the swing axial center position of the support arm, the amount of outward lateral projection of the slide guide portion can be reduced, and the lateral width of the seedling carrier when the end seedling carrier is in the storage posture can be made as compact as possible.

Further, since the attitude maintaining section for regulating the attitude fluctuation of the heave swing arm section in the deployed attitude is constituted by the gap filling member for filling the gap between the heave swing arm section and the traverse arm section, it is possible to cope with the attitude fluctuation with a more simple configuration by using a small member of a degree that the member enters the gap between the heave swing arm section and the traverse arm section, without becoming a large-sized member, as compared with a case where, for example, a receiving member extending outward from the traverse arm section is provided for the heave swing arm section in the deployed attitude. In this way, the attitude change of the heave swing arm portion can be reasonably restricted with a simple structure.

Therefore, in the structure in which the seedling stage is provided with the connection support device which can be divided into the main seedling stage and the end seedling stage and which can be switched to the operation posture connection state and the storage support posture, the lateral width of the seedling stage when the end seedling stage is in the storage posture can be made as compact as possible, and the posture of the support arm in the state of protruding laterally outward can be maintained by a simple structure.

The 9 th structural feature of the seedling planting device of the present invention is that,

a seedling carrying platform for carrying seedlings for planting comprises: a main seedling carrying platform with a plurality of seedling carrying parts; an end seedling stage which is freely divided left and right relative to the transverse end part of the main seedling stage in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling stage is supported in a storage support state overlapped on the surface side of the main seedling stage,

the connection support device includes: a slide guide part arranged on the back side of the main seedling carrying platform; and a support arm having one end side connected to the end seedling stage and the other end side guided and supported to be relatively movable in the left-right direction with respect to the slide guide,

a guide groove is formed along the left-right direction in a portion of the support arm which is close to the laterally inner side of the main seedling stage, the slide guide portion includes a pair of left and right rolling rollers which are rotatably supported by roller support shafts, respectively, and the pair of left and right rolling rollers roll in the guide groove,

a pair of left and right roller support shafts, each of which is formed by a bar-shaped body having one end connected to each other and integrally formed in a substantially U-shape, and is formed by extending a free end of one of the roller support shafts in a state of protruding from a free end of the other roller support shaft,

the support arm has: a laterally moving arm portion that slidably moves along the slide guide portion; and a seesaw-swinging arm portion connected to a lateral outer end portion of the lateral movement arm portion, and the posture of the seesaw-swinging arm portion is changeable to an extension posture in which the seesaw-swinging arm portion extends along an extension direction of the lateral movement arm portion and a meandering posture in which the seesaw-swinging arm portion stands up toward a front surface side of the main seedling support with respect to the lateral movement arm portion,

the guide groove is formed in the lateral direction at a position of the lateral movement arm portion that is located on a laterally inner side of the main seedling stage than a connection position with the luffing arm portion.

With this structure, the support arm includes: a lateral moving arm part sliding along the sliding guide part; and a heave swing arm part connected with the transverse outer side end part of the transverse moving arm part, wherein the posture can be changed into an extending posture pulled to the transverse outer side and a standing and bending posture, therefore, the swing axle center position of the supporting arm can be set at any position without being limited by the position of the transverse outer side end part of the sliding guide part.

As a result, the projecting amount of the slide guide portion to the outside in the lateral direction can be reduced without extending the position of the lateral outer end portion of the slide guide portion to the outside in the lateral direction of the swing axial center position of the support arm, and the lateral width of the seedling carrier when the end seedling carrier is in the storage posture can be made as compact as possible.

With this configuration, the guide groove formed in the support arm is guided to be rolled by the pair of left and right rolling rollers provided in the slide guide portion in a fixed position, and the support arm can be slidably moved in a state in which posture change in a direction intersecting with the sliding movement direction is restricted by the pair of left and right rolling rollers in a fixed position. Further, since the sliding is performed by the rolling guide of the roller and the guide groove, the sliding operation can be smoothly performed without twisting.

Further, since the pair of left and right roller support shafts for supporting the pair of left and right rollers are formed of a bar-shaped body having one end portions connected to each other and integrally formed in a substantially U-shape, and the free end portion of one roller support shaft is formed to be extended in a state of protruding from the free end portion of the other roller support shaft, the pair of rollers can be supported by a member having a simple structure, and the assembling work can be efficiently performed.

To be added, when a bar-shaped body formed in a substantially U shape integrally with a pair of left and right roller support shafts is attached to the slide guide portion and the support arm, these members need to be supported by hands and inserted into the roller support shafts in order to be inserted through insertion holes formed in the slide guide portion, guide grooves of the laterally movable arm portion formed in the support arm, and the rollers for rolling, respectively. In this case, if the pair of roll support shafts have the same length, there is a drawback that: the tips of the roller support shafts must be inserted at the same time, making the work difficult.

Therefore, in the present configuration, since the free end portion of one of the roller support shafts protrudes beyond the free end portion of the other roller support shaft, when the rod-shaped body is assembled to the pair of rollers, the protruding one of the roller support shafts is inserted first, and then the other roller support shaft is inserted, whereby the assembly work can be performed efficiently.

Therefore, in the structure in which the seedling stage is provided with the connecting and supporting device which can be switched into the main seedling stage and the end seedling stage and which has the connecting and supporting state which can be switched into the operation posture connecting state and the storing and supporting state, the lateral width of the seedling stage when the end seedling stage is in the storing and supporting posture can be made as compact as possible, and the horizontal posture of the supporting arm can be maintained to prevent the posture change, and the sliding operation can be easily performed, so that the structure is simple, and the assembly operability is not easily reduced.

The 10 th structural feature of the seedling planting device of the present invention is that,

a seedling carrying platform for carrying and planting seedlings comprises: a main seedling carrying platform with a plurality of seedling carrying parts; an end seedling stage which is freely divided left and right relative to the transverse end part of the main seedling stage in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous seedling carrying surface operation posture connection state; and the end seedling-carrying platforms are supported in a storage support state where they are superposed on the surface side of the main seedling-carrying platform,

the pair of left and right roller support shafts are formed of a bar-shaped body having one end connected to each other and integrally formed in a substantially U-shape, and the free end of one of the roller support shafts is formed to extend in a state of protruding from the free end of the other roller support shaft.

With this configuration, the guide groove formed in the support arm is guided to be rolled by the pair of left and right rolling rollers provided in the slide guide portion in a fixed position, and the support arm can be slidably moved in a state in which posture change in a direction intersecting the sliding movement direction is restricted by the pair of left and right rolling rollers in a fixed position. Further, since the sliding is performed by the rolling guide of the roller and the guide groove, the sliding operation can be smoothly performed without twisting.

Therefore, in the present configuration, since the free end portion of one of the roller support shafts protrudes beyond the free end portion of the other roller support shaft, when the rod-shaped body is assembled to each of the slide guide portion, the support arm, and the rolling roller, the protruding one of the roller support shafts is inserted first, and then the other roller support shaft is inserted, whereby the roller support shafts can be sequentially inserted one by one, and the assembly operation can be performed efficiently.

Therefore, the sliding operation can be easily performed while the horizontal posture of the support arm is maintained to prevent the posture change, and the structure is simple, and the assembling workability is not easily deteriorated.

Drawings

Fig. 1 is an overall side view of a riding rice transplanter.

Fig. 2 is a top view of a seedling planting device.

Fig. 3 is a side view of the seedling planting device.

Fig. 4 is a rear view of the seedling planting device.

Fig. 5 is a partial rear view of the seedling stage in the connected working posture.

FIG. 6 is a partial rear view of the seedling support in a separated state.

Fig. 7 is a side view of the seedling stage in the stored and supported state.

Fig. 8 shows the connection support device, fig. 8(a) is a front view showing the most contracted state, and fig. 8(b) is a front view showing the most extended state.

Fig. 9 shows the connection support device, fig. 9(a) is a sectional view taken along the line IXa-IXa in fig. 8(b), fig. 9(b) is a sectional view taken along the line IXb-IXb in fig. 9(a), fig. 9(c) is a sectional view taken along the line IXc-IXc in fig. 9(a), and fig. 9(d) is a sectional view taken along the line IXd-IXd in fig. 9 (a).

FIG. 10 is a bottom cross-sectional view showing a main part of a state after storing the end seedling stage.

Fig. 11 is a top view of a seedling planting device.

Fig. 12 is a vertical cross-sectional side view showing the support member and the support unit.

Fig. 13 is a vertical sectional front view showing the support member and the support unit.

Fig. 14 is an exploded perspective view showing the support member and the support unit.

FIG. 15 is a vertical sectional side view showing a contact portion between the first roller 1 and the guide rail.

Fig. 16 is a vertical cross-sectional side view showing the support member and the locking member.

Fig. 17 is a perspective view of the locking member.

Fig. 18 is a front view showing a support member and a locking member according to another embodiment.

Description of the symbols

12 seedling carrying platform

12A main seedling carrying platform

12B end seedling-carrying platform

24 connection supporting device

25 sliding guide part

26 supporting arm

27 guide groove

28 roller for rolling

29a, 29b roll support shaft

30 laterally moving arm

31 heave swing arm part

32 posture holding part

33 gap filling member

68 support member

75 rotating body for movement

76 sink-limiting rotary body

88 covering part

89 plate

93 restricting part

94 stop part

Detailed Description

Embodiments of the seedling planting device according to the present invention will be described below with reference to the accompanying drawings.

(Overall Structure)

Fig. 1 and 2 show a riding type rice transplanter having a seedling planting device 5 of the present invention. The rice transplanter has a seedling planting device 5 of eight-row planting type at the rear part of a machine body having a pair of left and right front wheels 1 and a pair of left and right rear wheels 2, and the seedling planting device 5 is driven to rise and fall freely by a hydraulic cylinder 4 through a link mechanism 3.

As shown in fig. 3 and 11, the seedling planting device 5 includes: a feed box 6; a square cylindrical main frame 7 connected to the feed box 6 and extending in the right-left direction; four planting transmission boxes 8 connected to the main frame 7 at predetermined intervals in the left-right direction and extending rearward; a rotary planting mechanism 9 rotatably supported at the left and right sides of the rear part of the planting transmission case 8; a grounded pontoon 10 for preparing soil on the field surface; and a seedling support 12 for supporting the cluster seedlings for planting.

As shown in fig. 1 and 3, the power of an engine 13 provided at the front of the machine body is transmitted to the planting gear box 8 through a front-rear direction gear shaft 14, the feeding box 6, and a lateral gear shaft 15. The planting mechanism 9 is rotationally driven by the power, and the seedling stage 12 is reciprocally driven to traverse in the left-right direction by a predetermined stroke by the traverse mechanism 11. While the seedling stage 12 is moved in the lateral direction, the planting mechanism 9 alternately takes out seedlings from the seedling stage 12 and plants them on the field surface. The seedling stages 12 are provided with a vertical feed mechanism 16 for vertically feeding seedlings to the planting mechanism 9, respectively, on the plurality of seedling placement sections.

As shown in fig. 11, the drive shaft 20 is provided in a single piece, the drive shaft 20 is positioned below the vertical feed mechanisms 16 and extends over each of the plurality of vertical feed mechanisms 16, and the input arm 21 is externally fitted to the drive shaft 20 via a one-way clutch (not shown). A vertical feed shaft 22 extending rightward and laterally outward from the feed box 6 is supported by a bracket 23 coupled to the main frame 7, and the vertical feed shaft 22 is rotationally driven by power transmitted to the feed box 6. The vertical feed shaft 22 has two vertical feed arms 22a spaced apart from each other in the left-right direction, and the input arm 21 is located between the pair of left and right vertical feed arms 22 a.

When the seedling stage 12 is driven by the reciprocating infeed, the input arm 21 is driven by the reciprocating infeed between the pair of right and left longitudinal feed arms 22a of the longitudinal feed shaft 22, during which the longitudinal feed mechanism 16 stops operating. When the seedling stage 12 reaches the stroke end of the reciprocating traverse driving, the input arm 21 reaches the position of one vertical feed arm 22a of the vertical feed shaft 22, and the input arm 21 is rotated by a predetermined angle by the vertical feed arm 22a and then returned to the original position. Thereby, the vertical feeding mechanism 16 is rotated by a predetermined angle, and vertically feeds the seedling on the seedling stage 12 downward by a predetermined amount.

[ Structure for dividing seedling stage ]

As shown in fig. 4, the seedling stage 21 has a two-division structure that can be divided into a right main seedling stage 12A and a left end seedling stage 12B in the left-right direction, the right main seedling stage 12A divides the seedling placement surface 12A into seven rows of seedling placement sections, and the left end seedling stage 12B divides the seedling placement surface 12A into one row of seedling placement sections.

The main seedling stage 12A and the end seedling stage 12B are connected by the connection support device 24, and the posture can be switched to these two states: the end seedling stage 12B is connected to the lateral end of the main seedling stage 12A to form a continuous operation posture connection state of the seedling placing surface 12A; and a storage support state in which the end seedling stage 12B is overlapped on the front surface side of the main seedling stage 12A and the width of the left and right sides is narrowed.

As shown in fig. 8 and 9, the coupling support device 24 includes: a slide guide 25 provided on the back side of the main seedling stage 12A; and a support arm 26 having one end connected to the end seedling stage 12B and the other end guided and supported to be movable in the left-right direction relative to the slide guide 25. A guide groove 27 is formed along the left-right direction in a portion of the support arm 26 close to the laterally inner side of the main seedling stage 12A. The slide guide 25 includes a pair of left and right rollers 28 rotatably supported by a pair of left and right

roller support shafts

29a and 29b, respectively, and the pair of left and right rollers 28 roll in the guide groove 27.

The support arm 26 includes: a lateral movement arm portion 30 that slides along the slide guide portion 25; a luffing swing arm 31 connected to the lateral outer end of the lateral movement arm 30; and a posture holding section 32 for regulating the posture change of the heave swing arm section 31. The heave swing arm 31 is supported so that the posture thereof can be changed to two postures: an extended posture in the extending direction of the laterally moving arm 30; and a zigzag posture in which the arm part 30 is moved laterally and is raised on the front surface side of the main seedling stage 12A. The posture holding portion 32 restricts the posture variation of the heave swing arm portion 31 in the extension posture.

The heave swing arm section 31 is supported by the traverse arm section 30 so as to be swingable about a swing axis center along the vertical direction, and is capable of changing the posture into an extended posture and a bent posture. The posture holding unit 32 is constituted by a gap filling member 33 for filling a gap between the seesaw swing arm 31 and the lateral movement arm 30, and is configured to receive and restrict posture change of the seesaw swing arm 31 in the extended posture to the back surface side of the seedling support 12.

Now, the slide guide 25 of the coupling support device 24 is fixed to the back surface side of the seedling support 12A in a posture in the left-right direction and has a groove-like cross-sectional shape. The support arm 26 is supported to be movable in the left-right direction relative to the slide guide 25. That is, the groove-shaped cross section of the support arm 26 has a size and a shape that is inscribed inside the groove-shaped cross section of the slide guide portion 25, and the support arm 26 has: a lateral movement arm portion 30 disposed so as to be slidable in the lateral direction along the longitudinal direction of the slide guide portion 25; and a square tubular heave swing arm 31 having one end connected to the lateral outer end of the lateral movement arm 30.

The seesaw swinging arm portion 31 is connected to the lateral moving arm portion 30 so as to be swingable in a seesaw manner about a swinging axis P1 along a forward tilting posture of the back surface of the seedling support 12, the swinging axis P1 is provided in a direction intersecting with a sliding direction of the lateral moving arm portion 30, and an end portion of the seesaw swinging arm portion 31 opposite to a side connected to the lateral moving arm portion 30 is connected to a back surface side of the end seedling support 12B.

Therefore, the support arm 26 is configured to be changeable in posture into these two postures: an extended posture in which the heave swing arm portion 31 extends in the extending direction of the traverse arm portion 30; and a zigzag posture in which the luffing jib 31 rises toward the front surface side of the main seedling support 12A with respect to the traverse jib 30.

A guide groove 27 extending in the left-right direction is formed in a portion of the traverse arm section 30 located on the laterally inner side of the main seedling stage 12A with respect to the connection portion with the luffing arm section 31, and a pair of left and right rolling rollers 28 supported rotatably by

roller support shafts

29a and 29b are provided in the slide guide section 25, and the pair of left and right rolling rollers 28 is guided to move in the guide groove 27. The pair of left and right

roller support shafts

29a, 29b are formed of gate-shaped members 34, and the gate-shaped members 34 are formed of bar-shaped members having one end portions connected to each other and integrally formed in a substantially U-shape.

As shown in fig. 8 and 9, the slide guide 25 is formed in a groove shape, and a gate-shaped component 34 is integrally fixed, and the gate-shaped component 34 has

roller support shafts

29a and 29b penetrating the

vertical wall portions

25A and 25A. The pair of

roller support shafts

29a and 29b are formed in a substantially cylindrical shape, have axial centers in a direction intersecting the sliding direction of the support arm 26, and are fixed in a state of being spaced apart by a predetermined interval L1 in the sliding direction of the support arm 26. The rolling rollers 28 are rotatably fitted to a pair of

roller support shafts

29a and 29b formed by the gate-shaped member 34.

As shown in fig. 8, in the gate-shaped member 34, the free end of one of the roller support shafts 29a is formed to extend in a state of protruding from the free end of the other roller support shaft 29 b. With such a configuration, when the gate-type component 34 is mounted in the assembling work, the free end portion of the one protruding roller support shaft 29a is inserted first, and then the free end portion of the other roller support shaft 29b is inserted, thereby providing an advantage that the inserting work is easy.

The laterally moving arm portion 30 of the support arm 26 has a groove-shaped outer wall 30A having a groove-shaped cross section of a size and a shape inscribed to the inside of the groove-shaped cross section of the slide guide portion 25, and a vertically flat plate-shaped plate wall 30B is welded and fixed to the opening side of the groove. Further, a guide groove 27 formed of an elongated long hole through which the roller 28 for rolling can be inserted is formed in a vertical side wall portion of the groove-shaped outer wall 30A. The guide groove 27 is formed sufficiently longer than the interval L1 between the pair of

roller support shafts

29a and 29b of the gate-shaped component 34, and the difference between the length L2 of the guide groove 27 and the interval L1 between the pair of

roller support shafts

29a and 29b of the gate-shaped component 34 is the range of the sliding movement of the support arm 26 in the lateral direction.

The groove width W1 of the guide groove 27 is formed to be approximately the same as or slightly larger than the outer diameter d1 of the rolling roller 28 so that the rolling roller 28 can rotate in a fitted state. Therefore, in the guide groove 27, the rolling roller 28 guides the sliding movement of the laterally moving arm 30 while rotating in contact therewith.

At this time, the flat plate-like wall 30B provided on the groove-like opening side is provided at substantially the same position as the one side edge 27a of the guide groove 27, and is set to a length range equal to or longer than the length L2 of the guide groove 27 than the length L2 of the guide groove 27.

The base end side end of the seesaw swinging arm 31 is pivotally connected to the traverse arm 30 by a support shaft 30C, and can be waved and swung around a swinging axis P1 along the forward tilting posture of the back surface of the seedling support 12 in a direction intersecting the sliding movement direction of the traverse arm 30. The other end of the seesaw swinging arm 31 is pivotally connected to a bracket 35 fixed near the left outer end of the end seedling support 12B by a support shaft 31C, and is rotatable about a swinging axis P2 parallel to the swinging axis P1.

The linking and supporting device 24 configured as described above is configured to slide and displace the end seedling support 12B in the left-right direction by the left-right sliding of the support arm 26 with respect to the slide guide 25, and to swing and displace the end seedling support 12B in the up-down direction by the up-and-down swinging of the support arm 26 with respect to the slide guide 25. Further, with this configuration, in the stored and supported state of the seedling stage 12, the end seedling stage 12B is pulled up to the main seedling stage 12A side, and is overlapped above the seedling placement surface 12A of the main seedling stage 12A in a posture parallel to the main seedling stage 12A to be in a state of being positioned at a predetermined storage position, whereby the entire width of the seedling stage 12 in the right and left direction can be made as compact as possible in comparison with the connected state of the operation postures.

As shown in fig. 8 and 9, when the seesaw swing arm portion 31 is in the extended posture, a gap filling member 33 is provided between the inner surface of the vertical wall portion of the groove-shaped outer wall 30A of the traverse arm portion 30 and the distal end side of the seesaw swing arm portion 31 with respect to the pivot connection portion pivotally connected to the traverse arm portion 30, so as to fill the gap therebetween. The gap filling member 33 is integrally formed of a synthetic resin, and has a structure in which: the locking shaft 33a is elastically locked and prevented from coming off in a state of being inserted into an insertion hole 30D formed in a longitudinal wall portion of the groove-shaped outer wall 30A.

By providing such a gap filling member 33, particularly in a state where the main seedling support 12A and the end seedling support 12B are disconnected and divided, when the seesaw arm portion 31 is slid laterally outward while maintaining the extended posture (a state shown by a phantom line in fig. 10), the posture change of the seesaw arm portion 31 to the back side of the seedling support 12 can be restricted. That is, in a state where the seesaw swing arm portions 31 are slid outward while maintaining the extended posture, since the load of the end seedling support 12B is applied in a cantilever shape to the pivot-connection portions of the seesaw swing arm portions 31, there is a possibility that the posture of the seedling support is changed to the back side thereof, but such a posture change can be prevented by the gap filling members 33. Therefore, the gap filling member 33 constitutes the attitude maintaining section 32, and regulates the attitude fluctuation of the heave swing arm section 31 in the extended attitude.

As shown in fig. 3, at the left end portion on the front surface side (seedling placement surface 12A side) of the main seedling stage 12A, there are vertically provided: an upper support frame 36 for receiving and supporting the upper side of the end seedling stage 12B at a predetermined storage position; and a lower support frame 37 for supporting the lower side of the end seedling stage 12B in a predetermined storage position.

When the end seedling stage 12B is switched to the storage support state, the end seedling stage 12B connected to the connection support device 24 is slid and displaced in the left-right direction, and the end seedling stage 12B is swung and displaced in the up-down direction by the fluctuation and swing of the support arm 26 with respect to the slide guide 25.

As shown in fig. 7, the end seedling support 12B is placed on the upper support frame 36 and the lower support frame 37, and is stored at a predetermined position in a state of being superposed on the seedling placement surface 12A of the main seedling support 12A in a posture parallel to the main seedling support 12A. Although the structure is not described in detail, the lower support frame 37 is provided with a lock mechanism 38 for fixedly holding the end seedling stage 12B at a predetermined storage position, and the end seedling stage 12B can be held in position.

As shown in fig. 5, 6, and 7, the main seedling stage 12A includes, at the divided end: the 1 st connecting member 41 on the upper side of the divided end; a 2 nd connecting member 42 located at an upper and lower intermediate portion; a 3 rd connecting part 43 on the surface side on the lower side; and a 4 th link 44 on the back side on the lower side. The divided ends of the end seedling stage 12B include: a1 st connecting member 45 located on an upper side of the divided end; a 2 nd connecting member 46 located at an upper and lower intermediate portion; a 3 rd connecting part 47 on the surface side on the lower side; and a 4 th link member 48 on the back side on the lower side.

Positioning holes

41a, 41b, 44a are formed in the 1 st and 4

th connecting members

41, 44 of the main seedling stage 12A. The 1 st link member 45, the 2 nd link member 46, and the 4 th link member 48 of the end seedling stage 12B have

positioning pins

45a, 46a, and 48a projecting rightward. The positioning pins 45a, 46a, 48a of the end seedling stage 12B are inserted into the

positioning holes

41a, 41B, 44a of the corresponding main seedling stage 12A, whereby the end seedling stage 12B can be positioned at a predetermined working position in a state of being coupled to the main seedling stage 12A in the left-right direction.

The seedling stage 12 has: a1 st lock mechanism 51 for connecting the 1 st link member 41 of the main seedling stage 12A and the 1 st link member 45 of the end seedling stage 12B in the connected state in the operation posture; a 2 nd lock mechanism 52, the 2 nd lock mechanism 52 connecting the 2 nd link member 42 of the main seedling stage 12A and the 2 nd link member 46 of the end seedling stage 12B; a 3 rd lock mechanism 53, wherein the 3 rd lock mechanism 53 connects the 3 rd link member 43 of the main seedling stage 12A and the 3 rd link member 47 of the end seedling stage 12B; and a 4 th locking mechanism 54, wherein the 4 th locking mechanism 54 connects the 4 th connecting member 44 of the main seedling stage 12A and the 4 th connecting member 48 of the end seedling stage 12B.

The 1 st lock mechanism 51 is configured to be screw-engaged, that is, a long bolt 56 with a handle provided in the 1 st link member 45 of the end seedling stage 12B is screwed into a weld nut 55 provided in the 1 st link member 41 of the main seedling stage 12A, and the state where the 1 st link member 45 of the end seedling stage 12B is engaged with and held by the 1 st link member 41 of the main seedling stage 12A is locked.

The 2 nd lock mechanism 52 is of a clamp type structure, that is, a lock 57 made of a plate spring having a U-shaped cross section and provided to the 2 nd link member 42 of the main seedling stage 12A so as to be swingable up and down sandwiches the clamped portion 42A of the 2 nd link member 42 provided to the main seedling stage 12A and the clamped portion 46A of the 2 nd link member 46 provided to the end seedling stage 12B, and locks the state in which the 2 nd link member 46 of the end seedling stage 12B is joined to and held by the 2 nd link member 42 of the main seedling stage 12A.

The 3 rd locking mechanism 53 is of a clamp type structure, that is, a state in which the 3 rd link member 47 of the end seedling stage 12B is engaged with and held by the 3 rd link member 43 of the main seedling stage 12A is locked by clamping the clamped portion 43A of the 3 rd link member 43 provided on the main seedling stage 12A and the clamped portion 47A of the 3 rd link member 47 provided on the end seedling stage 12B by a lock member 58 formed of a plate spring having a U-shaped cross section and provided on the 3 rd link member 43 of the main seedling stage 12A swingably in the up-down direction.

The 4 th locking mechanism 54 is configured to be screw-engaged, that is, a long bolt 60 with a handle provided in the 4 th connecting member 48 of the end seedling stage 12B is screwed into a weld nut 59 provided in the 4 th connecting member 44 of the main seedling stage 12A, and the state where the 4 th connecting member 48 of the end seedling stage 12B is engaged with and held by the 4 th connecting member 44 of the main seedling stage 12A is locked.

[ supporting Structure of seedling stage ]

The seedling stage 12 is supported by a seedling stage support frame 61 and four planting gear boxes 8 so as to be capable of reciprocating in the lateral direction, the seedling stage support frame 61 is fixed and erected from the main frame 7 and is in a gate shape when viewed from the front, and the four planting gear boxes 8 are fixed and extended from the main frame 7 to the rear.

That is, as shown in fig. 3 and 4, an upper guide mechanism 62 is provided between the seedling support frame 61 and the seedling support 12, and the upper guide mechanism 62 guides the seedling support 12 to move in the left-right direction in a state where the displacement of the seedling support 12 in a direction intersecting the seedling placement surface 12a is prevented at the time of seedling planting work.

The upper guide mechanism 62 includes: an upper rail 63 fixed to an upper portion of the back surface side of the seedling stage 12 in a posture in the left-right direction across both left and right end portions of the seedling stage 12; and six upper guide rollers 65, the six guide rollers 65 being rotatably supported on the support shaft 64 at the upper end portion of the seedling stage support frame 61 with a predetermined interval in the left-right direction.

As shown in fig. 3, the upper rail 63 has a downward U-shaped cross section, and has engaging grooves 63a formed across both left and right ends. The upper guide rollers 65 are engaged in the engagement groove 63a, and the upper guide rollers 65 are supported in a state where the upper guide rail 63 is allowed to move in the right-left direction. The depth of the engaging groove 63a is formed larger than the vertical width of the upper guide roller 65, and the depth of the upper guide roller 65 engaged in the engaging groove 63a can be changed to change the seedling removal amount as described below.

Between the four planting carriages 8 and the seedling platform 12, there is provided a lower guide mechanism 66, and the lower guide mechanism 66 guides the lower part of the seedling platform 12 to move in the left-right direction in a state where the seedling platform 12 is prevented from being displaced in a direction intersecting the seedling placement surface 12 a.

As shown in fig. 3, the lower guide mechanism 66 includes: a guide rail 67, which is fixed to a lower portion of the back side of the seedling stage 12 in a posture in the left-right direction across both left and right end portions of the seedling stage 12, and which is made of an aluminum extruded member; a support member 68, the support member 68 being capable of receiving and supporting the guide rail 67 from below and extending in the left-right direction; and a plurality of support units 69, the support units 69 supporting the seedling stage 12 to be movable in the lateral direction.

The support member 68 is supported so as to be freely changeable in position in the vertical direction (specifically, in the direction along the longitudinal feeding direction of the seedling) with respect to the four planting transmission boxes 8. In brief, as shown in fig. 11, one operating shaft 71 is rotatably supported in a state of extending across bearing portions (not shown) formed in the four planting gear boxes 8. An operation arm 71a is provided at a portion of the operation shaft 71 close to the planting gear box 8. A seedling take-out amount changing lever 72 extending obliquely forward and upward is connected to an intermediate portion of the operation shaft 71. The seedling removal amount changing lever 72 is inserted into a lever guide 73 connected to the main frame 7 so as to be lockable and retainable. By operating the seedling removal amount changing lever 72, the vertical position of the support member 68 along the seedling placement surface can be changed. When the position of the support member 68 is changed, the vertical position of the entire seedling stage 12 is changed along the seedling placement surface, and the quantity of seedlings to be taken out by the planting mechanism 9 can be changed.

As shown in fig. 11, the four support units 69 are connected to the support member 68 in a state of being positioned at lateral sides of the four planting gear boxes 8 and being arranged with a predetermined interval in the left-right direction.

As shown in fig. 12 to 14, the support unit 69 includes: a support bracket 74; a1 st roller 75 as a moving rotating body, the 1 st roller 75 being supported on the support bracket 74 so as to be rotatable about an axial center P3 along a direction intersecting the seedling placement surface 12a of the seedling stage 12; and a 2 nd roller 76 as a rotation body for restricting the sinking, the 2 nd roller 76 being supported so as to be rotatable about an axial center P4 along a direction parallel to the seedling placement surface 12 a.

The support bracket 74 has a front wall 77 and a rear wall 78 in a flat plate-like vertical posture to support the 1 st roller 75. A support shaft 79 is connected to the front wall 77 and the rear wall 78, and a1 st roller 75 is rotatably inserted into the support shaft 79, and the 1 st roller 75 is positioned between the front wall 77 and the rear wall 78. Therefore, the 1 st roller 75 is supported rotatably about the axial center of the support shaft 79, that is, about an axial center P3 in a direction intersecting the longitudinal feeding direction of the seedling.

The upper portion of the front wall portion 77 and the upper portion of the rear wall portion 78 have

flange portions

77a and 78a, respectively, and the

flange portions

77a and 78a are positioned on both the left and right sides of the 1 st roller 75 and are formed by being bent in the lateral direction. The two

flange portions

77a and 78a are fixed to the support member 68 by bolting as will be described later in a state of being fastened together.

The second roller 76 has an upper wall 80 for supporting the second roller 80, and the upper wall 80 is fixed to the front wall 77 and the rear wall 78. The upper wall portion 80 has: a lower transverse portion; a longitudinal portion connected to a back surface of the seedling stage of the lower transverse portion; and an upper lateral portion connected to the longitudinal portion, the upper wall portion 80 being formed in a substantially zigzag shape as viewed from the side. Flange portions 80a positioned on both right and left sides of the 1 st roller 75 and oriented in the lateral direction are formed by bending in the lower lateral portion of the upper wall portion 80, and the flange portions 80a are sandwiched between the flange portion 77a of the front wall portion 77 and the flange portion 78a of the rear wall portion 78 and fastened and fixed together by bolts 81.

A flange portion 80b having a lateral posture for supporting the 2 nd roller 76 is formed at an upper lateral portion of the upper wall portion 80. A bracket 82 is bolted to the flange portion 80b, a support shaft 83 is fixed to the bracket 82 in a state of being along the longitudinal feeding direction a1 of the seedling, and the 2 nd roller 76 is supported rotatably about the 2 nd axial center P4 of the support shaft 83 along the longitudinal feeding direction a1 of the seedling. The 2 nd roller 76 is positioned above the 1 st roller 75 in a side view, and the rotation axis P3 and the axis P4 are substantially perpendicular to each other.

As shown in fig. 13 and 14, an opening 84 penetrating in the vertical direction is formed in the support member 68 at a portion corresponding to each of the left lateral sides of the four planting transmission cases 8, and blind nuts 85 are attached to both the left and right sides of the opening 84. The support unit 69 is disposed below the support member 68 in a state where the 2 nd roller 76 is positioned above the support member 68 and the 1 st roller 75 enters the opening 84 from below the support member 68. The

flange portions

77a, 78a, 80a of the front wall portion 77, the rear wall portion 78, and the upper wall portion 80 are fastened together by the bolts 81 and the blind nuts 85, whereby the support unit 69 and the support member 68 are fastened.

In the lower part of the seedling stage 12, a guide rail 67 extending long in the left-right direction is provided. The guide rail 67 is supported to be laterally movable while being guided by the 1 st roller 75 and the 2 nd roller 76 in the support unit 69.

As shown in fig. 12 to 14, the guide rail 67 includes: a1 st rail portion 86 that abuts against the 1 st roller 75; a 2 nd track part 87 in contact with the 2 nd roller 76. Further, a covering portion 88 is provided, and the covering portion 88 is connected to an upper portion of the 2 nd rail portion 87, and covers an upper portion of the 2 nd roller 76 in a state of extending in a direction intersecting the seedling placing surface 12 a. By forming the covering portion 88 in this manner, the soil can be suppressed from falling down onto the 2 nd roll 76.

The 1 st rail portion 86 has a cross-sectional shape of: a plane portion 86a in a direction intersecting the longitudinal feeding direction a1 of the seedling; a rear wall portion 86b extending downward from an end portion of the planar portion 86a on the side of the seedling stage 12; a front wall portion 86c extending downward from an end of the flat portion 86a on the opposite side of the seedling support 12 to the rear wall portion 86 b. The 2 nd rail portion 87 is integrally extended and provided in a state of extending upward from the rear wall portion 86b of the 1 st rail portion 86 in the longitudinal feeding direction a1 of the seedling. Further, a covering portion 88 is integrally extended from the upper portion of the 2 nd rail portion 87 in a direction intersecting the longitudinal feeding direction a1 of the seedling.

The 1 st roller 75 enters between the front wall portion 86c and the rear wall portion 86b of the 1 st rail portion 86 from the lower side, and the flat surface portion 86a of the 1 st rail portion 86 contacts the 1 st roller 75 in the direction along the longitudinal feeding direction a1 of the seedling. Therefore, a groove into which the 1 st roller enters and engages is formed in the 1 st raceway portion 86.

In addition, the 2 nd roller 76 enters between the flat surface portion 86a of the 1 st rail portion 86 and the covering portion 88, and the 2 nd roller 76 comes into contact with the 2 nd rail portion 87 in a direction intersecting with the longitudinal feeding direction a1 of the seedling.

With the above configuration, the guide rail 67 is supported by the 1 st roller 75 and the 2 nd roller 76, and the seedling support 12 is supported by the support member 68. The 1 st roller 75 and the 2 nd roller 76 are guided while rolling along the 1 st rail portion 86 and the 2 nd rail portion 87, and the seedling support 12 is supported to be laterally movable in the longitudinal direction of the support member 68.

The load of the seedling stage 12 in the direction along the seedling placing surface 12a is received by the 1 st roller 75, and the seedling stage 12 can move in the left-right direction while the guide rail 67 can roll on the 1 st roller 75. Further, the load of the seedling stage 12 in the direction intersecting the seedling placement surface 12a is received by the 2 nd roller 76, and the sinking of the seedling stage 12 in the direction intersecting the seedling feeding direction is restricted.

As shown in fig. 15, the position of the 1 st roller 75 is set such that the lateral portion of the 1 st roller 75 on the seedling stage 12 side is spaced apart from the rear wall portion 86B of the 1 st rail portion 86 by a predetermined interval B1, and the lateral portion of the 1 st roller 75 on the opposite side of the seedling stage 12 is spaced apart from the front wall portion 86c of the 1 st rail portion 86 by a predetermined interval B2.

As shown in fig. 12 and 15, a plurality of plates 89 made of stainless steel and having excellent wear resistance are attached to the portion of the flat surface portion 86a of the 1 st rail portion 86 facing the 1 st roller 75 by screws 90 along the longitudinal direction of the support member 68. That is, the plate 89 is provided with a plurality of plates and is located only in a region where the 1 st roller 75 is rolling. When the plate 89 becomes worn, the screw 90 can be removed for replacement.

As shown in fig. 12, a plurality of plates 91 made of stainless steel and having excellent abrasion resistance are attached to the 2 nd rail portion 87 at a portion contacting the 2 nd roller 76 by screws 92 in the longitudinal direction of the support member 68. That is, the plurality of plates 91 are attached and are located only in the region where the 2 nd roller 76 rolls. When the plate 91 is worn, the screw 92 can be removed for replacement.

Next, a structure for suppressing the seedling stage 12 from floating will be described.

As shown in fig. 11, the lower guide mechanism 66 includes a regulating unit 93, and the regulating unit 93 regulates floating of the seedling stage 12 with respect to the support member 68 while allowing the lateral movement of the seedling stage 12. The restricting unit 93 is provided on the seedling support 12 so as to be positioned between the plurality of 1 st rollers 75 in the left-right direction, and is composed of a locking member 94, and the locking member 94 extends in the up-down direction so as to straddle the seedling support 12 and the support member 68, and restricts the floating of the seedling support 12.

Further, while the seedling stage 12 is reciprocated in the left-right direction, all the 1 st rollers 75 are maintained in a state of being positioned between the lower side of the seedling stage 12 and the support member 68 and supporting the lower side of the seedling stage 12, and while the seedling stage 12 is reciprocated in the left-right direction, the locking members 94 (the restricting portions 93) are maintained in a state of being positioned between the plurality of 1 st rollers 75.

That is, as shown in fig. 16 and 17, the locking member 94 includes: a mounting portion 96 in which a nut 95 is fitted; and a claw portion 97 extending from the mounting portion 96, and the locking member 94 is integrally formed of a synthetic resin. In the guide rail 67, the attachment portion 96 of the locking member 94 enters a recessed portion surrounded by the flat surface portion 86a of the 1 st rail portion 86, the 2 nd rail portion 87, and the covering portion 88, the attachment portion 96 of the locking member 94 is attached to the 2 nd rail portion 87 and the covering portion 88, the claw portion 97 of the locking member 94 enters the lower side of the support member 68, and the bolt 98 and the nut 95 of the attachment portion 96 are fastened and fixed from the upper side of the covering portion 88.

When the seedling stage 12 is driven to perform the reciprocating traverse, the locking member 94 moves together with the seedling stage 12, but the locking member 94 moves in the traverse direction within a range not contacting the operation arm 71a of the operation shaft 71 and the support unit 69. Further, the locking member 94 functions to prevent the seedling support 12 from floating up because the claw portion 97 of the locking member 94 engages with the support member 68 even if upward reaction force from the seedling is applied to the seedling support 12 to cause the seedling support 12 to float up when the seedling of the seedling support 12 is fed downward (the seedling longitudinal feeding direction a1) by the longitudinal feeding mechanism 16.

When the seedling stage 12 is driven to be fed in the reciprocating and transverse directions, even if the seedling stage 12 is floated by vibration or the like, the claw portions 97 of the locking members 94 are engaged with the supporting members 68, so that the floating of the seedling stage 12 can be suppressed.

In this case, as shown in fig. 16, in a state where the 1 st roller 75 is in contact with the flat surface portion 96a (the plate 89) of the 1 st rail portion 86, the upper surface of the claw portion 97 of the locking member 94 is positioned below the lower surface of the supporting member 68 with a predetermined interval B3 so that the claw portion 97 of the locking member 94 does not normally come into contact with the supporting member 68.

The position of the supporting unit 69 is set to: the seedling stage 12 is reciprocally moved laterally along the support member 68, and the right-most laterally outer support unit 69 does not come off the seedling stage 12 to the right lateral side even if the seedling stage 12 is located at the stroke end on the left side in the longitudinal direction of the support member 68; even if the seedling stage 12 is positioned at the stroke end on the right side, the left most laterally outer support unit 69 does not laterally leave the seedling stage 12 to the left. Further, while the seedling stage 12 is reciprocally moved in the lateral direction along the support members 69, the installation position of the locking member 94 is set so as to maintain the state between the support units 69 positioned on the left and right sides, that is, the 1 st roller 75 in the left and right directions.

As shown in fig. 4, the locking members 94 are provided in plurality at intervals in the left-right direction, but the locking members 94 located at both ends in the left-right direction are fastened and fixed to the guide rail 67 together with a support bracket 99, and the support bracket 99 supports the drive shaft 20 of the vertical feed mechanism 16. Otherwise, the locking member is separately connected and fixed to the guide rail as shown in fig. 16.

[ other embodiments ]

(1) In the above embodiment, the following configuration is exemplified: the moving rotating body (the first roller 75) is provided on the support member 68, and the regulating portion 93 (the locking member 94) is provided on the seedling stage, but instead of this, as shown in fig. 18, a configuration may be made such that: the moving rotating body 75 is provided on the seedling support 12, and the regulating portion 93 (locking member 94) is provided on the support member 68.

(2) In the above embodiment, the following configuration is made: the rotation body for controlling the sinking (the 2 nd roller 76) is provided on the support member 68, and the covering portion 88 for covering the upper side of the rotation body for controlling the sinking (the 2 nd roller 76) is provided on the seedling stage 12, however, instead of this configuration, it is possible to adopt a configuration in which: the rotation body for controlling sinking (the 2 nd roller 76) is provided on the seedling stage 12, and a covering portion for covering the upper side of the rotation body for controlling sinking is provided on the support member 68.

(3) In the above embodiment, the following configuration is made: the support arm 26 in the connection support device 24 has the traverse arm portion 30 and the heave swing arm portion 31, but instead of this structure, the support arm 26 may be formed of an integral member, and may be configured to be freely slidable along the slide guide portion 25, and the posture may be changed to the extended posture and the bent posture.

(4) In the above embodiment, the following configuration is exemplified: a guide groove 27 extending in the left-right direction is formed in the support arm 26 of the coupling support device 24, a pair of left and right rolling rollers 28 that roll in the guide groove 27 are rotatably supported by

roller support shafts

29a, 29b in the slide guide portion 25, the pair of left and right

roller support shafts

29a, 29b are formed of a rod-like body integrally formed in a substantially U-shape, and a free end portion of one roller support shaft is formed to extend in a state of protruding from a free end portion of the other roller support shaft. The pair of roller support shafts may be provided separately.

(5) In the above embodiment, the seedling support 12 is configured to be left-right dividable: a main seedling carrying platform 12A which is divided into seven rows and is arranged at the right side of the seedling carrying part; and the end seedling stage 12B on the left side of the seedling support section formed by dividing the seedling support surface 15a into one row, but the present invention is not limited to this, and the end seedling stage 12B may be formed by dividing into two or more rows of seedling support sections, and the main seedling stage 12A may be formed by dividing into six or less rows of seedling support sections.

(6) In the above embodiment, the following configuration is made: the seedling support 12 has a plate 89 having excellent abrasion resistance at a portion contacting the moving rotating body (the 1 st roller 75), but may have a structure without such a plate.

(7) In the above embodiment, the following configuration is made: the gap filling member 33 is provided to fill the gap between the heave swing arm portion 31 and the traverse arm portion 30, but the gap filling member may be omitted.

(8) Although the seedling planting device of the eight-row planting type has been illustrated in the above embodiment, the present invention is applicable to seedling planting devices having various configurations such as a number of planting lines of seven or less, a number of planting lines of nine or more, and the like.

Industrial applicability of the invention

The present invention can be applied to a seedling planting device equipped on a riding type rice transplanter or a walking type rice transplanter.

Claims

1. A seedling planting device is characterized in that,

a seedling carrying platform for carrying seedlings for planting comprises: a main seedling carrying platform with a plurality of seedling carrying parts; an end seedling stage which is freely divided left and right relative to the transverse end part of the main seedling stage in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous seedling carrying surface operation posture connection state; and the end seedling stage is supported in a storage support state overlapped on the surface side of the main seedling stage,

the support arm has: a laterally moving arm portion that slidably moves along the slide guide portion; a seesaw arm portion which is connected to a lateral outer end portion of the lateral movement arm portion and which is changeable in posture into an extended posture in which the seesaw arm portion extends along an extension direction of the lateral movement arm portion and a bent posture in which the seesaw arm portion stands up toward a front surface side of the main seedling support with respect to the lateral movement arm portion; and a posture maintaining section that restricts a posture variation of the heave swing arm section in the extension posture,

the heave swing arm portion is supported so as to be swingable about a swing axis along a vertical direction with respect to the traverse arm portion, in a state in which a posture of the heave swing arm portion is changeable to the stretching posture and the bending posture,

the posture maintaining section is configured by a gap filling member that fills a gap between the seesaw swinging arm section and the lateral movement arm section so as to receive and restrict a posture change of the seesaw swinging arm section in the extended posture to a back surface side of the seedling support.

2. A seedling planting device is characterized in that,

a seedling carrying platform for carrying seedlings for planting comprises: a main seedling carrying platform with a plurality of seedling carrying parts; an end seedling carrier which is freely divided left and right relative to the transverse side end part of the main seedling carrier in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling stage is supported in a storage support state overlapped on the surface side of the main seedling stage,

a guide groove extending in the left-right direction is formed in a portion of the support arm which is close to the laterally inner side of the main seedling stage, the slide guide portion includes a pair of left and right rolling rollers which are rotatably supported by roller support shafts, respectively, and the pair of left and right rolling rollers roll in the guide groove,

the guide groove is formed in a lateral direction at a position of the traverse arm portion that is located more inward in the lateral direction of the main seedling stage than a connection position with the seesaw swinging arm portion.

3. A seedling planting device is characterized in that,

a seedling carrying platform for carrying seedlings for planting comprises: a main seedling stage having a plurality of seedling loading sections; an end seedling stage which is freely divided left and right relative to the transverse end part of the main seedling stage in the left and right direction; and a connection support device that can be switched to these two states: the end seedling carrying platform is connected with the transverse side end part of the main seedling carrying platform to form a continuous operation posture connection state of the seedling carrying surface; and the end seedling stage is supported in a storage support state overlapped on the surface side of the main seedling stage,

the pair of left and right roller support shafts are formed of a bar-shaped body having one end portions connected to each other and integrally formed in a substantially U-shape, and the free end portion of one roller support shaft is formed to extend in a state of protruding from the free end portion of the other roller support shaft.