JP2015223104A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange, in a seedling planting device, a mud guard cover receiving mud splashed by a rear wheel of a travel vehicle body toward the seedling planting device without enlarging a separation distance between the travel vehicle body and the seedling planting device.SOLUTION: The sulky rice transplanter includes: a seedling planting device connected to a rear part of a travel vehicle body so as to oscillate vertically; and a mud guard cover 58 having a vertical length from a lower part to an upper part of the seedling planting device and attached to the seedling planting device so as to receive mud splashed by a rear wheel 9 of the travel vehicle body toward the seedling transplanting device. The mud guard cover 58 includes, in a portion facing the rear wheel 9, a notch part 58D avoiding contact with the rear wheel 9 in a state in which the seedling planting device 4 is lowered to a lower limit position in which an upper side of the seedling planting device 4 is in a closest approaching position to the rear wheel 9.

Description

  The present invention relates to a riding rice transplanter in which a seedling planting device is connected to a rear portion of a traveling vehicle body so as to be swingable up and down.

  As the above-mentioned riding rice transplanter, use the left and right props installed upright on the seedling planting device so as to receive and support the upper side of the seedling stand extending from the lower side toward the traveling body A mud removal cover having a left and right width extending from near the link mechanism for connecting the seedling planting device to the rear part of the traveling vehicle body so as to be able to swing up and down, to the left and right outer ends of the seedling platform, beyond the left and right columns. Is configured so as to be provided in the seedling planting device in an arrangement in which the whole is positioned on the traveling vehicle body side with respect to the left and right columns (see, for example, Patent Document 1).

  Moreover, as for the above-mentioned riding rice transplanter, the operation state of the control valve for raising and lowering is switched in conjunction with the vertical swing of the leveling float provided in the seedling planting device so that the seedling planting device moves up and down. A mechanical linkage mechanism that maintains the planting depth of the seedling by the planting mechanism to the planting depth set by the planting depth adjustment lever provided in the seedling planting device by linking the leveling float and the control valve There is something to prepare. The mechanical linkage mechanism includes a linkage wire, a vertical linkage member that links one end portion of the outer wire and the free end portion of the leveling float in the linkage wire, and one end portion of the inner wire in the linkage wire at a predetermined position with respect to the seedling planting device. And a fixing mechanism portion for fixing to. In addition, a fixing member fixed to the fixing portion of the seedling planting device, a front and rear balance swinging member that swings up and down around a supporting shaft that faces left and right with respect to the fixing member, and a linkage A left and right connecting shaft that connects one end of the inner wire to the front end of the balance swinging member through the long hole of the member, and a linkage rod that links the rear end of the balance swinging member to the planting depth adjustment lever And maintaining a constant amount of protrusion of the inner wire from one end of the outer wire regardless of the change in the reference height of the leveling float accompanying the planting depth adjustment of the seedling by the planting depth adjustment lever, It is configured to maintain constant control sensitivity in the lifting control that automatically swings the seedling planting device in conjunction with the vertical swing of the leveling float.

  By the way, in the riding rice transplanter provided with such a mechanical linkage mechanism, there is one in which the linkage rod is formed in a crank shape in which both end portions extend in opposite directions to each other (see, for example, Patent Document 2). ).

Japanese Patent Laying-Open No. 2007-75067 (paragraph numbers 0030-0031, FIGS. 1-2, FIG. 10) JP 2000-295909 A (paragraph number 0025, FIG. 2, FIG. 4, FIG. 5)

  In the case of riding rice transplanters, when the seedling planting device is maintained or when the riding rice transplanter is stored in a barn etc., the seedling planting device is installed at the ground contact height position of the left and right rear wheels. The leveling float may swing down to the lower limit position where it touches down in a horizontal position. And when the seedling planting device is lowered and swung down to the lower limit position in this way, the upper side of the seedling planting device comes closest to the left and right rear wheels. There is a risk that the upper side contacts the left and right rear wheels.

  Therefore, in the riding rice transplanter, between the upper side of the seedling planting device closest to the lower limit lower state of the seedling planting device in which the seedling planting device is swung down to the lower limit position and the left and right rear wheels, Ensuring a small gap to avoid contact between them, the distance between the traveling vehicle body and the seedling planting device becomes unnecessarily large, and the size of the riding rice transplanter and the seedling planting from the traveling vehicle body are increased. While preventing deterioration in workability when replenishing seedlings on the seedling mount of the apparatus, the upper side of the seedling planting apparatus is prevented from coming into contact with the left and right rear wheels.

  However, in such a riding rice transplanter, if the mud removal cover having the configuration described in Patent Document 1 is provided in the seedling planting device, it is ensured between the upper side of the seedling planting device and the left and right rear wheels. It is necessary to increase the contact avoidance gap to allow the mud cover to be equipped. For this reason, the distance between the traveling vehicle body and the seedling planting device is increased, which may lead to an increase in the size of the riding rice transplanter and a decrease in workability for replenishing seedlings from the traveling vehicle body to the seedling mount.

  On the other hand, in the riding rice transplanter provided with the mechanical linkage mechanism described above, when the configuration described in Patent Document 2 is adopted, both ends of the linkage rod extend in opposite directions from each other. When the rear end of the balance swinging member is linked to the planting depth adjusting lever, the connecting rod is directed from the left and right sides of the seedling planting device toward the balance swinging member and the planting depth adjusting lever. After insertion, one end of the linkage rod is inserted into and engaged with the rear end of the balance swinging member, and the other end of the linkage rod is used as a planting depth adjustment lever. It is necessary to perform an insertion engagement operation to the left and right other side for insertion engagement.

  As a result, it is easy to take time to link the balance swinging member and the planting depth adjusting lever by the linkage rod, and there is room for improvement in improving the assembling property of the linkage rod in the mechanical linkage mechanism.

  The first object of the present invention is to provide a mud removal cover that catches mud that the rear wheel of the traveling vehicle body repels toward the seedling planting device without increasing the separation distance between the traveling vehicle body and the seedling planting device. It is to be provided in a seedling planting device.

  A second object of the present invention is to provide a linkage rod in a mechanical linkage mechanism that links the leveling float and the control valve so that the seedling planting device automatically moves up and down in conjunction with the vertical swing of the leveling float. The purpose is to improve the assembly.

The problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. With a notch,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
A marker that forms a running reference index on the mud surface of the field is arranged so that it can swing up and down on the left and right of the seedling planting device,
A locking member that locks and holds the free end side of the marker that has been switched to a standing posture is attached to a connecting member that connects the left and right struts and the cross member disposed at the laterally outer end of the seedling planting device,
The locking member has a hook portion for marker locking at one end portion, and is bent into a shape having a J-shaped attachment portion for the connecting member at the other end portion,
The connecting member receives the end surface of the locking member on the mounting portion side to position the locking member in the left-right direction, and the engagement member is engaged with the left and right sides of the locking member. A direction orthogonal to the left-right direction and the positioning direction of the engaging part by sandwiching the engaging part between the engaging part for positioning in a direction orthogonal to the direction and the fastening member attaching fastener. And a clamping part for positioning the locking member.

  According to this means, the following effects [1] to [6] can be obtained.

[1] Lowering the lower limit of the seedling planting device by providing a notch for the rear wheel at the location facing the rear wheel in the mud cover, as in the case where the mud cover does not have a notch for the rear wheel Even if the clearance secured between the rear wheel closest to the state and the upper part of each column is not increased to allow the mud removal cover to be installed, the rear wheel The possibility of contact with the removal cover can be avoided.

  As a result, since the mud cover is provided between the traveling vehicle body and the seedling planting device, it is not necessary to increase the separation distance between the traveling vehicle body and the seedling planting device. It is possible to avoid an increase in the size of the riding rice transplanter and a decrease in the seedling replenishment workability from the traveling vehicle body to the seedling stage due to an increase in the distance from the planting device.

  And the lower limit lowering state of the seedling planting device is a state to be implemented when the seedling planting device is maintained or when the riding rice transplanter is stored in a barn etc. For this reason, even if the rear wheel is engaged with the cutout portion of the mud removal cover, there is no problem in preventing mud from adhering to the back side of the seedling planting device.

[2] By extending the upper end of the mudguard cover forward and forward from the lower side, the mud cover is extended to the rear wheel side while the length of the mud cover is extended upward. The amount can be increased.

  As a result, the mud cover can be well received by the mud cover that the rear wheel repels toward the seedling planting device, while reducing the size and weight of the mud cover. It is possible to effectively suppress mud adhesion.

[3] By providing the support member with an engaged member, the lower edge of the mud cover can be easily connected to the support member. As a result, the assembling property of the mudguard cover can be improved.

[4] By attaching the first notch for the operation tool and the second notch for the support to the lower end of the mud cover, each support and operation tool can be attached to and detached from the support member from the front of the seedling planting device. The mud removal cover can be formed in a shape having a wide width and a large mud receiving area while enabling the operation and the swinging operation of the operation tool from the traveling vehicle body side.

  As a result, it is possible to provide a mud removal cover with a large mud receiving area without impairing the detachability of each strut and the operation tool and the operability of the operation tool, so that mud adheres to the back side of the seedling planting device. Can be more effectively suppressed.

[5] The mud cover is attached to the seedling planting device by connecting the lower edge of the mud cover to the engaged member and connecting the upper part of the mud cover to each connecting member with a bolt with a knob. Thus, the mud removal cover can be easily attached to the seedling planting device without using a tool.

  Conversely, the removal of the mud cover from the seedling planting device can be achieved by releasing the connection between the upper part of the mud cover and the connecting members using bolts with knobs and then inserting the lower edge of the mud cover into the engaged member. By releasing the connection, the mud removal cover can be easily removed from the seedling planting device without using a tool.

  Thereby, the cleaning of the mud removal cover performed by removing the mud removal cover from the seedling planting device, the maintenance of the seedling planting device, and the like can be facilitated.

[6] By providing a locking member that locks and holds the free end side of the marker that has been switched to the standing posture, each marker can be idle when traveling on the road, transported by a truck, or stored in a barn. By locking the end side to the hook portion of the corresponding locking member by human operation, it is possible to prevent rolls caused by vibration of the airframe of each marker switched to the standing posture. Thereby, the contact with the other object resulting from the rolling of each marker switched to the standing posture can be prevented.

  In addition, the left and right locking members can be properly attached to the predetermined positions of the seedling planting device by the left and right connecting members, and the right and left markers locked to the hook portions of the respective locking members can be attached to the seedlings. It can be locked and held at an appropriate position of the planting device. As a result, it is possible to more reliably prevent contact with other objects due to rolling of each marker switched to the standing posture.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. With a notch,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member.

  According to this means, the effects [1] to [5] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. And a notch.

  According to this means, the effects [1] to [4] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a left and right support member that supports the lower end of the mud removal cover,
The support member includes an engaged member that enables insertion and connection of a lower edge portion of the mudguard cover.

  According to this means, the effects [1] to [3] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. The upper end portion of the mud removal cover is inclined forward more largely than the lower side.

  According to this means, the effects [1] to [2] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. It has a notch to avoid contact.

  According to this means, the effect [1] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
As the mud cover, it includes a left mud cover that faces the left half of the seedling table, and a right mud cover that faces the right half of the seed table,
The left and right mud removal covers are configured as left and right symmetrical parts,
A marker that forms a running reference index on the mud surface of the field is arranged so that it can swing up and down on the left and right of the seedling planting device,
A locking member that locks and holds the free end side of the marker that has been switched to a standing posture is attached to a connecting member that connects the left and right struts and the cross member disposed at the laterally outer end of the seedling planting device,
The locking member has a hook portion for marker locking at one end portion, and is bent into a shape having a J-shaped attachment portion for the connecting member at the other end portion,
The connecting member receives the end surface of the locking member on the mounting portion side to position the locking member in the left-right direction, and the engagement member is engaged with the left and right sides of the locking member. A direction orthogonal to the left-right direction and the positioning direction of the engaging part by sandwiching the engaging part between the engaging part for positioning in a direction orthogonal to the direction and the fastening member attaching fastener. And a clamping part for positioning the locking member.

  According to this means, the following effects [7] to [14] can be obtained.

[7] Since the plate-like cover part of the mudguard cover located on the rear side of the front edge of each column is opposed to the left and right rear wheels, seedling planting is provided between the rear wheel and the mudguard cover. While securing the clearance to avoid contact between the rear wheel and the mudguard cover in the lower limit lowered state of the seedling planting device where the upper side of the attaching device is closest to the rear wheel, Compared with the case where it is configured to be positioned on the front side of the front edge of each support column, the seedling planting device can be provided together with the mud removing cover in a state of being moved toward the traveling vehicle body.

  In other words, since the mud cover is provided between the traveling vehicle body and the seedling planting device, it is not necessary to increase the separation distance between the traveling vehicle body and the seedling planting device. It is possible to avoid an increase in the size of the riding rice transplanter and a reduction in workability of replenishing seedlings from the traveling vehicle body to the seedling stage due to an increase in the distance from the attaching device.

[8] Extending the mud cover to the rear wheel side while shortening the length of the upper part of the mud cover by shortening the upper end of the mud cover from the lower side. The amount can be increased.

  As a result, the mud cover can be well received by the mud cover that the rear wheel repels toward the seedling planting device, while reducing the size and weight of the mud cover. It is possible to effectively suppress mud adhesion.

[9] By providing the engaged portion to the float cover provided in the support member, the float cover can be used as a connecting member that connects the lower edge of the mud cover to the support member, and the mud cover for the support member is provided. Connection of the lower edge can be facilitated.

  As a result, it is possible to improve the assembling property of the mud cover while simplifying the configuration by reducing the number of parts and reducing the cost.

[10] By providing the mud cover with the bulging portion, the connecting portion between the leveling tool and the support member can be covered from the front by the bulging portion of the mud removing cover, and the mud leveling with the rear wheel jumped up It is possible to prevent adhesion of the tool and the support member to the connecting portion. In this way, the leveling tool can be attached to the support member without removing the mud cover from the support member, while the connecting portion between the leveling tool and the support member is covered by the bulging portion of the mud cover. Detachable.

  As a result, maintenance such as replacement of leveling tools can be easily performed.

[11] By providing a notch for the operation tool or the support for the lower end of the mud cover, each column or operation tool is attached to and detached from the support member from the front of the seedling planting device, and from the traveling vehicle body side. The mud removing cover can be formed in a shape having a wide width and a large mud receiving area while enabling the operation tool to swing.

  As a result, it is possible to provide a mud removal cover with a large mud receiving area without impairing the detachability of each strut and the operation tool and the operability of the operation tool, so that mud adheres to the back side of the seedling planting device. Can be more effectively suppressed.

[12] For attachment of the mud cover to the seedling planting device, the lower edge of the mud cover is inserted into the engaged part and connected, and then the upper part of the mud cover is connected to each connecting member with a bolt with a knob. Thus, the mud removal cover can be easily attached to the seedling planting device without using a tool.

  Conversely, when removing the mud cover from the seedling planting device, after the connection between the upper part of the mud cover and each connecting member using bolts with knobs is released, the lower edge of the mud cover is inserted into the engaged part. By releasing the connection, the mud removal cover can be easily removed from the seedling planting device without using a tool.

  Thereby, the cleaning of the mud removal cover performed by removing the mud removal cover from the seedling planting device, the maintenance of the seedling planting device, and the like can be facilitated.

[13] By providing the left and right mud removing covers, the mud removing cover can be easily handled with a small area as compared with the case of providing a single mud removing cover. As a result, it is possible to improve workability when the mud removal cover is attached to and detached from the seedling planting apparatus.

  And, by configuring the left and right mud removal covers as left and right symmetrical parts, the cost reduction by combining the molds required to form them while having the left and right mud removal covers, and It is possible to facilitate parts management.

[14] By providing a locking member that locks and holds the free end side of the marker that has been switched to the standing posture, the free play of each marker when traveling on the road, transporting by truck, or storing in a barn or the like. By locking the end side to the hook portion of the corresponding locking member by human operation, it is possible to prevent rolls caused by vibration of the airframe of each marker switched to the standing posture. Thereby, the contact with the other object resulting from the rolling of each marker switched to the standing posture can be prevented.

  In addition, the left and right locking members can be properly attached to the predetermined positions of the seedling planting device by the left and right connecting members, and the right and left markers locked to the hook portions of the respective locking members can be attached to the seedlings. It can be locked and held at an appropriate position of the planting device. As a result, it is possible to more reliably prevent contact with other objects due to rolling of each marker switched to the standing posture.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
As the mud cover, it includes a left mud cover that faces the left half of the seedling table, and a right mud cover that faces the right half of the seed table,
The left and right mud removing covers are configured as left and right symmetrical parts.

  According to this means, the effects [7] to [13] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member.

  According to this means, the effects [7] to [12] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end portion thereof, there is provided an operation tool extending from the seedling planting device toward the traveling vehicle body, or a notch for allowing the support to be connected to the support member.

  According to this means, the effects [7] to [11] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space between the lower end portion and the front end of the support member that allows the front end of the support member to be connected from below the leveling implement.

  According to this means, the effects [7] to [10] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
The support member includes a float cover that receives mud repelled by the rear wheel toward the leveling float;
The float cover includes an engaged portion that enables insertion and connection of a lower edge portion of the mud cover.

  According to this means, the effects [7] to [9] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device receives and supports the seedling mounting stand in a front-up posture extending toward the traveling vehicle body and the upper side of the seedling mounting base from the lower side in an arrangement deviated from right behind the rear wheel in the left-right direction. With a plurality of supporting columns,
The mud cover is positioned on the rear side of the front edge of the support column and faces the back side of the seedling table, and the support column bulges forward from the plate cover unit And a vertically long bulging cover portion that covers from the front side, and the upper end portion of the mud removal cover is inclined forward more than the lower side.

  According to this means, the effects [7] to [8] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device receives and supports the seedling mounting stand in a front-up posture extending toward the traveling vehicle body and the upper side of the seedling mounting base from the lower side in an arrangement deviated from right behind the rear wheel in the left-right direction. With a plurality of supporting columns,
The mud cover is positioned on the rear side of the front edge of the support column and faces the back side of the seedling table, and the support column bulges forward from the plate cover unit And a vertically long bulging cover portion covering the front side.

  According to this means, the effect [7] can be obtained.

Another problem solving means of the present invention is:
A seedling planting device connected to the rear portion of the traveling vehicle body so as to be able to swing up and down; a hydraulic cylinder that drives the seedling planting device to move up and down; and a control valve that controls the flow of oil to the hydraulic cylinder,
The seedling planting device includes a leveling float that swings up and down around a support shaft facing left and right, a planting mechanism for planting a predetermined amount of seedlings in field mud after leveling by the leveling float, and the planting mechanism A planting depth adjusting lever that adjusts the planting depth of the seedling by the planting mechanism by changing the height position of the leveling float;
By linking the leveling float and the control valve so that the operation state of the control valve is switched in conjunction with the vertical swing of the leveling float and the seedling planting device is moved up and down, the planting mechanism It has a mechanical linkage mechanism that keeps the seedling planting depth constant,
The mechanical linkage mechanism includes a linkage wire, a longitudinal linkage member that links one end portion of the outer wire in the linkage wire and the free end portion of the leveling float, and one end portion of the inner wire in the linkage wire. A fixing mechanism that fixes the attachment device at a predetermined position;
The linkage member includes a longitudinally long hole,
The fixing mechanism portion includes a fixing member fixed to a fixing portion of the seedling planting device, a back and forth balance swinging member that swings up and down around a support shaft facing left and right with respect to the fixing member, A left and right connecting shaft that passes through the elongated hole of the linkage member and connects one end of the inner wire to the front end of the balance swinging member, and the planting depth adjustment of the rear end of the balance swinging member A linkage rod linked to the lever, the inner wire from one end of the outer wire regardless of the change in the reference height of the leveling float accompanying the planting depth adjustment of the seedling by the planting depth adjustment lever Configure the protrusion amount to be constant,
The linkage rod is formed in a shape in which both end portions extend toward the same left and right side, the assembly of one end portion to the rear end portion of the balance swinging member, and the planting of the other end portion Assembly to the depth adjustment lever can be performed from one side of the right and left sides of the seedling planting device.

  According to this means, by forming the connecting rod into a shape in which both end portions thereof extend toward the same left and right side, the rear end portion of the balance swinging member is set to the planting depth adjusting lever by the connecting rod. When linking, insert the linking rod from the left and right sides of the seedling planting device toward the balance swinging member and the planting depth adjustment lever, so that the rear end of the balance swinging member at its one end For example, it is possible to perform a linkage by, for example, insertion engagement with the portion and a linkage by, for example, insertion engagement with the planting depth adjustment lever at the other end at once.

  As a result, it is possible to easily link the balance swinging member and the planting depth adjustment lever by the coupling rod from the left and right sides of the seedling planting device. Improvements can be made.

It is a left view of the riding rice transplanter for 6 row planting. It is a left view of a seedling planting device or the like in a riding rice transplanter for 6-row planting. It is a front view of a seedling planting device and a mud removal cover in a riding rice transplanter for 6-row planting. It is a schematic plan view of the seedling planting apparatus in the riding rice transplanter for 6 row planting. It is a perspective view of the principal part of the seedling planting apparatus provided with the mud removal cover in the riding rice transplanter for 6 row planting. It is the vertical left side view of the principal part which shows the attachment structure of the mud removal cover and the float cover in the riding rice transplanter for 6 row planting. It is a disassembled perspective view of the principal part which shows the attachment structure of the mud removal cover and the float cover in the riding rice transplanter for 6 row planting. It is a cross-sectional top view of the principal part which shows the structure by the leveling float side of the mechanical linkage mechanism which links a leveling float and a control valve. It is a vertical left side view of the principal part showing the structure of the leveling float side of the mechanical linkage mechanism that links the leveling float and the control valve. It is a perspective view of the principal part which shows the structure by the leveling float side in the mechanical linkage mechanism which links a leveling float and a control valve. It is a perspective view of the principal part which shows the attachment structure of the locking member for markers in the riding rice transplanter for 6 row planting. It is the vertical left side view of the principal part which shows the attachment structure of the lower end part of the mud removal cover in the riding rice transplanter for 6 row planting. It is a cross-sectional top view of the principal part which shows the effect | action of the notch part for rear-wheels of the mud removal cover in the riding rice transplanter for 6 row planting. It is a left side view of a seedling planting device or the like in a riding rice transplanter for 8-row planting. It is. It is front views, such as a seedling planting apparatus and a mud removal cover, in the riding rice transplanter for 8-row planting. It is a disassembled perspective view of the principal part which shows the attachment structure of the mud removal cover and the leveling implement in the riding rice transplanter for 8-row planting. It is the vertical left side view of the principal part which shows the attachment structure of the lower end part of the mud removal cover in the riding rice transplanter for 8-row planting. It is a cross-sectional top view of the principal part which shows the contact avoidance effect | action with the rear wheel of the mud removal cover in the riding rice transplanter for 8-row planting. It is front views, such as a seedling planting apparatus and a mud removing cover, showing the front shape of the mud removing cover in another embodiment. It is a perspective view of the principal part which shows the structure by the leveling float side of the mechanical linkage mechanism which links the leveling float and control valve in another embodiment.

  [First Embodiment]

  Hereinafter, as an example of an embodiment for carrying out the present invention, a first embodiment in which the present invention is applied to a riding rice transplanter for six-row planting that is an example of a riding rice transplanter will be described with reference to the drawings.

  As shown in FIG. 1, the 6-row riding rice transplanter exemplified in the first embodiment employs a single-acting hydraulic cylinder at the rear of a traveling vehicle body 1 configured in a riding type four-wheel drive type. A parallel quadruple link type link mechanism 3 that swings up and down by the operation of the lift cylinder 2 is connected. And the seedling planting apparatus 4 for 6 row planting is connected to the lower part of the rear end of this link mechanism 3 via the front-back support shaft (not shown) so that rolling is possible. Thereby, the seedling planting device 4 is equipped at the rear part of the traveling vehicle body 1 so as to be able to swing up and down and to be able to roll.

  The traveling vehicle body 1 has an air-cooled engine 5 mounted in a vibration-proof manner at the front portion thereof. And, the power transmission from the engine 5 is a belt-type transmission 6, a hydrostatic continuously variable transmission (not shown) provided as a main transmission, and a gear-type transmission incorporated in the transmission case 7 as an auxiliary transmission. (Not shown) and the like are transmitted to the left and right front wheels 8 and the left and right rear wheels 9. Moreover, the boarding operation part 10 is provided in the rear part side. The boarding operation unit 10 includes a boarding step 11, a steering wheel 12 for front wheel steering, a driver seat 13 whose position can be adjusted in the front-rear direction, and a rear step 14 that can be used as a stepping board when the seedling planting device 4 is replenished. Etc.

  As shown in FIGS. 1 to 6, the seedling planting device 4 has a field mud surface such as a planting planting planned site by sliding on the planting frame 15 that forms the framework as the traveling vehicle body 1 travels. The three leveling floats 16 for leveling the seedlings, the seedling stage 17 formed so as to be able to place six matted seedlings, the lateral feed mechanism 18 for reciprocating the seedling stage 17 with a constant stroke in the left-right direction, and the seedling stage Each mat placed on the seedling stage 17 and a vertical feed mechanism 19 that feeds each mat-like seedling on the seedling stage at a predetermined pitch toward the lower end of the seedling stage 17 every time the left and right stroke ends are reached. 6 rotary-type planting mechanisms 20 for cutting a predetermined amount of seedlings from the lower end of the seedlings and planting them in the field mud after leveling, and power distribution for distributing the power from the traveling vehicle body 1 to each mechanism 18-20 Power distribution box with built-in mechanism (not shown) Scan 21, provided with a like are configured to perform planting seedlings up Article 6.

  As shown in FIGS. 2 to 7, the planting frame 15 stands in a forward inclined posture on the left and right sides of the support member 22 that are long and square pipes arranged on the left and right of the seedling planting device 4. The left and right support columns 23, the cross member 24 installed over the upper portions of the left and right support columns 23, and three transmission cases 25 extending rearward from the support member 22 in a line-up arrangement with a certain interval in the left-right direction, Etc. And by providing the power distribution case 21 connected to the link mechanism 3 via the front and rear support shafts at the left and right intermediate portions of the support member 22, the support member 22 can connect the left and right support columns 23, the transmission cases 25, and the like. It is comprised so that it may function as a main member to support. In addition, planting mechanisms 20 are provided on both the left and right sides of the rear end of each transmission case 25.

  The left and right struts 23 are welded to the lower portions thereof with a lower connecting member 26 that enables bolt connection with the support member 22. Further, an upper connecting member 27 that enables bolt connection with the cross member 24 is welded to the upper part thereof. And it arrange | positions in the right-and-left space | interval suitable for supporting the seedling mounting stand 17 for 6 articles | strands, and is located in the back of the rear wheel 9 on either side.

  As shown in FIGS. 2, 3, 5, 6, and 8 to 10, each leveling float 16 includes three sets of rear portions extending from the left and right float fulcrum shafts 28 to the rear and downward. A free end portion (rear end portion) of the corresponding support arm 29 among the support arms 29 is connected via a left and right support shaft 30 so as to be able to swing vertically with the support shaft 30 as a fulcrum. doing. The float fulcrum shaft 28 is equipped with a planting depth adjustment lever 31 that swings integrally with each support arm 29 via the float fulcrum shaft 28 so as to extend forward and upward from the float fulcrum shaft 28. The planting depth adjustment lever 31 can be held at an arbitrary operation position by engagement with a lever guide 32 erected on the support member 22.

  From this configuration, the height position of each leveling float 16 with respect to each planting mechanism 20 can be integrally changed by swinging the planting depth adjusting lever 31 in the vertical direction. The planting depth of the seedling to the field by the planting mechanism 20 can be adjusted. Then, after this adjustment, the planting depth adjusting lever 31 is engaged with the lever guide 32 at an arbitrary operation position, whereby the planting depth of the seedling to the field by each planting mechanism 20 is engaged at that time. The planting depth corresponding to the position can be set and held.

  As shown in FIGS. 1 to 4, the seedling placing stand 17 is provided in the seedling planting device 4 in a front rising posture extending from the rear lower part of the seedling planting device 4 toward the boarding operation unit 10 of the traveling vehicle body 1. Yes. Then, a horizontally long lower sliding member 33 is provided at the lower end of the rear surface over the left and right ends of the seedling table 17. Further, a horizontally long upper sliding member 34 is provided on the upper side of the rear surface over the left and right end portions of the seedling mount 17. The lower sliding member 33 is slidably mounted on the left-right sliding rail 35 in the left-right direction. The slide rail 35 is attached to the front and rear intermediate portions of each transmission case 25 via a seedling removal amount adjusting mechanism 36. The upper sliding member 34 includes a fitting rail portion whose side view has a downward U-shape. And the fitting rail part is externally fitted to the four guide rollers 37 provided in the cross member 24 so as to be slidable in the horizontal direction from above in a state of being arranged with a predetermined interval in the horizontal direction.

  That is, the lower side of the seedling table 17 is received and supported by the slide rail 35 from below, and the upper side of the seedling table 17 is supported by the left and right support columns 23 via the cross member 24 and the four guide rollers 37. By receiving and supporting from below, the seedling planting device 4 is equipped with a seedling mount 17 in a forwardly raised posture so as to be slidable in the left-right direction.

  As shown in FIGS. 3 and 5, the seedling amount adjustment mechanism 36 is linked to a seedling amount adjustment lever 38 disposed on the right side of the planting depth adjustment lever 31 so as to be swingable up and down. Then, by this linkage, the height position of the slide rail 35 with respect to each transmission case 25 is changed in conjunction with the vertical swing operation of the seedling amount adjustment lever 38. The seedling removal amount adjusting lever 38 can be held at an arbitrary operation position by the engagement with the lever guide 32 described above.

  From this configuration, the height position of the seedling placing stand 17 with respect to each planting mechanism 20 provided in each transmission case 25 can be changed by swinging the seedling collection amount adjusting lever 38 in the vertical direction. Thus, the amount of seedling taken from each mat-like seedling placed on the seedling placing stand 17 by each planting mechanism 20 can be adjusted. Then, after this adjustment, the seedling amount adjustment lever 38 is engaged with the lever guide 32 at an arbitrary operation position, so that the amount of seedling taken from each mat-like seedling by each planting mechanism 20 is engaged at that time. The seedling removal amount corresponding to the position can be set and held.

  As shown in FIGS. 3 to 5, the lateral feed mechanism 18 includes a gear-type lateral feed transmission unit (not shown) that changes the lateral feed speed of the seedling platform 17, and a lateral feed speed change by a sliding operation in the left-right direction. And a detent portion (not shown) for engaging and holding the speed change operation shaft 39 at an arbitrary operation position. The lateral feed transmission unit and the detent unit are built in the power distribution case 21. The speed change operation shaft 39 extends leftward from the power distribution case 21. Further, a lateral feed amount adjusting lever 40 that enables operation of the speed change operation shaft 39 from the traveling vehicle body side is linked to the left end portion thereof. The lateral feed amount adjusting lever 40 is mounted on the lever support member 41 bolted to the support member 22 described above so as to be able to swing left and right in a front-to-back posture extending from the seedling planting device 4 toward the traveling vehicle body 1. Yes. The rear end portion is linked to the left end portion of the speed change operation shaft 39.

  From this configuration, the horizontal feed rate adjusting lever 40 is swung in the left-right direction, so that the horizontal feed rate of the seedling mounting base 17 with respect to the seedling planting rate of each planting mechanism 20 can be changed stepwise. Thus, it is possible to change the number of seedlings picked up by each planting mechanism 20 with respect to the lateral width of each mat-like seedling placed on the seedling placing stand 17.

  Although illustration is omitted, the traveling vehicle body 1 is provided with a working operation lever in the boarding operation unit 10. The operation lever is configured to be able to switch and hold between an ascending position, a neutral position, a descending position, and a planting position. And it is linked via a mechanical linkage mechanism for manual lifting to a lifting control valve that controls the flow of oil to the lifting cylinder 2. Moreover, it links with the planting clutch which interrupts transmission to the seedling planting apparatus 4 via the mechanical linkage mechanism for clutch operation. Further, it is linked to the link mechanism 3 via a mechanical linkage mechanism for neutral return. The control valve for raising and lowering is a mechanical linkage mechanism 42 for automatically raising and lowering the left and right center leveling float 16 that functions as a sensor float that senses changes in the depth of mud in the field caused by ups and downs of the field cultivator (FIG. 2). 3, 5, and 7 to 9).

From this configuration, when the operating lever is operated to the raised position, the control valve is switched to a supply state in which oil is supplied to the lifting cylinder 2 by the action of a mechanical linkage mechanism for manual lifting. Thereby, the raising / lowering cylinder 2 is contracted, and the seedling planting device 4 moves up and swings together with the link mechanism 3.
When the seedling planting device 4 together with the link mechanism 3 reaches the upper limit position due to the upward swing, the operation lever swings back from the upward position to the neutral position by the action of the mechanical linkage mechanism for neutral return, and for manual lifting and lowering. By the action of the mechanical linkage mechanism, the control valve is switched to a stop state in which the supply and discharge of oil to and from the lifting cylinder 2 is stopped. Thereby, the raising / lowering cylinder 2 stops operation | movement, and the seedling planting apparatus 4 with the link mechanism 3 stops automatically in an upper limit position.
When the operation lever is operated from the neutral position to the lowered position, the control valve is switched to a discharge state in which oil is discharged from the lift cylinder 2 by the action of a mechanical linkage mechanism for manual lift. Thereby, the raising / lowering cylinder 2 is extended, and the seedling planting device 4 together with the link mechanism 3 swings downward.
When the leveling float 16 at the center of the left and right is grounded by this downward swing, the control valve is operated by the mechanical linkage mechanism 42 for automatic lifting and lowering over the mechanical linkage mechanism for manual lifting and lowering. According to the ground contact posture, the state is automatically switched to a discharge state, a stop state, and a supply state.
Specifically, when the leveling float 16 at the center of the left and right is lowered forward from the reference posture, the control valve is automatically switched to the discharge state, whereby the elevating cylinder 2 is extended and the seedling is planted together with the link mechanism 3. The device 4 swings downward.
On the contrary, when the leveling float 16 at the center of the left and right rises forward from the reference posture, the control valve is automatically switched to the supply state, whereby the lifting cylinder 2 is contracted and the seedling planting device 4 together with the link mechanism 3 is operated. Swings up.
When the leveling float 16 at the center of the left and right reaches the reference posture, the control valve automatically switches to a stopped state, whereby the lifting cylinder 2 stops operating and the seedling planting device 4 moves up and down together with the link mechanism 3. Stop moving.
When the operation lever is operated from the lowered position to the planting position, the planting clutch can be switched from the disconnected state to the connected state while maintaining the state in which the mechanical linkage mechanism 42 for automatic lifting and lowering is operated. Can be activated.
When the operation lever is operated from the planting position to the lowered position, the planting clutch can be switched from the connected state to the disconnected state while maintaining the state in which the mechanical linkage mechanism 42 for automatic lifting and lowering is operated. Can be stopped.
When the operation lever is operated from the lowered position to the raised position, as described above, the seedling planting device 4 moves up and swings together with the link mechanism 3, and when the seedling planting device 4 together with the link mechanism 3 reaches the upper limit position, The operation lever swings back from the raised position to the neutral position, and the seedling planting device 4 together with the link mechanism 3 automatically stops at the upper limit position.

  In other words, at the time of planting work in which the operation lever is operated to the planting position, the planting planting is performed according to the mud depth of the field that changes due to the ups and downs of the field cultivator due to the action of the mechanical linkage mechanism 42 for automatic lifting and lowering. The device 4 can be automatically swung up and down, whereby each leveling float 16 can be maintained in the reference posture, and as a result, the mud depth of the field changes due to the ups and downs of the field cultivator and the like. Regardless, the planting depth of the seedlings by each planting mechanism 20 can be kept constant.

  As shown in FIGS. 2, 3, 5, and 8 to 10, the mechanical linkage mechanism 42 for automatic lifting and lowering includes a linkage wire 43, one end portion of the outer wire 43 </ b> A in the linkage wire 43, and the leveling float 16 at the left and right center. A vertically-facing linkage member 44 that links the free end portion (front end portion), a fixing mechanism portion 45 that fixes one end portion of the inner wire 43B of the linkage wire 43 to a predetermined position with respect to the seedling planting device 4, and the like. Yes.

  The linking member 44 is made of a strip steel material that is bent and formed in a downward U-shape when viewed in the front-rear direction. And the longitudinally long hole 44A is provided in the both right and left sides.

  The fixing mechanism 45 includes a fixing member 46 fixed to the support member 22 which is a fixing part of the seedling planting device 4, and a longitudinal balance that swings up and down with respect to the fixing member 46 with a supporting shaft 47 facing left and right. A swing shaft 48, a left and right connecting shaft 49 that connects one end of the inner wire 43 B to the front end of the balance swing member 48 through the elongated hole 44 A of the linkage member 44, and the rear end of the balance swing member 48 A connecting rod 50 that links the portion to the planting depth adjusting lever 31 is provided. The amount of protrusion of the inner wire 43B from one end portion of the outer wire 43A connected to the linkage member 44 regardless of the change in the reference height of each leveling float 16 accompanying the planting depth adjustment lever 31 by the planting depth adjustment lever 31. Is configured to be constant.

  The mechanical linkage mechanism 42 for automatic lifting and lowering is a projection amount of the inner wire 43B from one end portion of the outer wire 43A connected to the linkage member 44 by a swinging operation of a sensitivity adjustment lever (not shown) provided in the boarding operation unit 10. Can be changed. By changing the protrusion amount, the reference posture of the leveling float 16 at the center of the left and right can be changed, and the detection sensitivity of the leveling float 16 at the center of the left and right can be changed. The leveling float 16 at the center of the left and right becomes more sensitive as the inner wire 43B protrudes from one end of the outer wire 43A connected to the linkage member 44 and the reference posture is changed in the forward downward direction. On the contrary, the sensitivity of detection becomes insensitive as the amount of protrusion of the inner wire 43B from one end of the outer wire 43A connected to the linkage member 44 is shortened and the reference posture is changed in the upward direction.

  That is, due to the operation of the fixing mechanism 45 described above, the reference of the leveling float 16 at the center of the left and right regardless of the change in the reference height of each leveling float 16 accompanying the planting depth adjustment by the planting depth adjustment lever 31. The posture can be made constant, and the sensitivity of the leveling float 16 at the center of the left and right can be kept constant.

  As shown in FIGS. 3, 5, and 8 to 10, the linkage rod 50 is formed in a lateral J shape in which both end portions 50 </ b> A and 50 </ b> B extend leftward from the intermediate portion 50 </ b> C. The one end portion 50A is inserted into and engaged with the rear end portion of the balance swinging member 48, and the other end portion 50B is inserted into and engaged with the proximal end side of the planting depth adjusting lever 31, so that the balance is shaken. The rear end portion of the moving member 48 is linked to the planting depth adjustment lever 31.

  That is, the connecting rod 50 is formed in a lateral J-shape in which both end portions 50A and 50B extend leftward from the intermediate portion 50C, so that the rear end portion of the balance swinging member 48 is planted deeply by the connecting rod 50. When linking to the base end side of the height adjusting lever 31, by inserting the linking rod 50 from the right side of the seedling planting device 4 toward the balance swinging member 48 and the planting depth adjusting lever 31, The insertion engagement of the one end portion 50A with the rear end portion of the balance swinging member 48 and the insertion engagement of the other end portion 50B with the planting depth adjusting lever 31 can be performed at once.

  As a result, the linkage rocking member 48 and the planting depth adjusting lever 31 can be easily linked from the right side of the seedling planting device 4 by the linkage rod 50, and a mechanical linkage mechanism 42 for automatic lifting and lowering. The assembly | attachment property of the linkage rod 50 in can be improved.

  The linkage rod 50 includes an inclined portion 50D that is inclined outwardly between the one end portion 50A and the intermediate portion 50C. Accordingly, when the leveling float 16 at the center of the left and right is greatly swung up and down, the upward bulging portion 16a at the periphery of the free end portion is configured to be difficult to contact the linkage rod 50.

  As shown in FIGS. 1 to 3 and FIG. 5, the seedling planting device 4 includes markers 51 that form a running reference index for the next stroke on the mud surface of the field on the left and right sides. The left and right markers 51 are placed on the left and right corresponding ends of the support member 22 of the seedling planting device 4, and are stood up along the seedling planting device 4. It is connected so as to be able to swing up and down over the overhanging posture for forming the indicator.

  Although not shown in the drawings, this riding rice transplanter includes left and right tension springs that downwardly bias the left and right markers 51 toward the lying posture, and left and right first wire linkage mechanisms that link the left and right markers 51 to the link mechanism 3. The left and right swing locks that are locked and biased to be locked to the base end portions of the corresponding markers 51 as the left and right markers 51 reach the standing posture, and the above-described operation for work. A left and right second wire-type linkage mechanism that links the lever and the left and right swing locks is provided.

  As a result, when the work lever is operated to the raised position and the seedling planting device 4 is lifted and swung toward the upper limit position during the work travel in which one of the left and right markers 51 is switched to the lying posture, By the action of the first wire type linkage mechanism, the marker 51 in the lying posture can be erected and oscillated toward the erecting posture in conjunction with the ascending and oscillating in the non-working height region of the seedling planting device 4. When the marker 51 reaches the standing posture by the standing swing, the marker 51 that has reached the standing posture can be fixedly held in the standing posture by the action of the corresponding swinging locking tools on the left and right. Then, after operating the work lever to the lowered position and lowering the seedling planting device 4 to the work height position where each leveling float 16 contacts the ground, the work lever is operated to the planting position and either left or right is not yet operated. When the swinging operation is performed on the planting side, the left and right corresponding tension springs can be released by the action of the corresponding left and right second wire-type linkage mechanisms in the standing posture of the marker 51 positioned on the non-planting side. By the above action, the marker 51 on the non-planting side, which has been released from the fixed holding in the standing posture, can be rocked in a lying manner toward the lying posture.

  As shown in FIGS. 2, 3, 5, and 11, the seedling planting device 4 includes left and right locking members 52 that lock and hold the free end sides of the left and right markers 51 switched to the standing posture. Yes. Each locking member 52 is bent into a shape having a hook 52A for locking the marker at one end and a J-shaped mounting portion 52B for the connecting member 27 for the upper portion at the other end. Made of round steel bar. Each upper connecting member 27 includes a receiving portion 27A for positioning the locking member 52 in the left-right direction by receiving an end surface 52C on the mounting portion side of the locking member 52, and a mounting portion 52B for the locking member 52. The engaging portion 27B for positioning the locking member 52 in the front-rear direction by the engagement of the engaging member 52 and the mounting portion 52B of the locking member 52 are sandwiched between a bolt as the fastener 53 for attaching the locking member. Accordingly, a holding portion 27C for positioning the locking member 52 in the vertical direction is provided.

  With this configuration, the free end side of each marker 51 is locked to the hook portion 52A of the corresponding locking member 52 by human operation when traveling on the road, transporting by truck, or storing in a barn or the like. Thus, it is possible to prevent rolling or the like caused by vibration of the airframe of each marker 51 switched to the standing posture. Thereby, the contact with the other thing resulting from the rolling of each marker 51 switched to the standing posture can be prevented. In addition, the left and right locking members 52 can be properly attached to the predetermined positions of the seedling planting device 4 without misalignment, whereby the left and right markers 51 locked to the hook portions 52A of the respective locking members 52 are attached to the seedlings. The planting device 4 can be locked and held at an appropriate position.

  As shown in FIGS. 1 to 3, the link mechanism 3 is provided with a rolling motor 54 formed of an electric motor at the upper part of the rear end thereof. The rolling motor 54 performs the rolling operation of the seedling planting device 4 via the buffer spring 56 installed over the respective connecting wires 55 and the cross member 24 by turning the left and right connecting wires 55 back and forth. It is configured as follows. And based on the output of the angle setter (not shown) that sets the rolling angle of the seedling planting device 4 and the output of the rolling sensor (not shown) that detects the rolling angle of the seedling planting device 4, By performing the rolling operation of the seedling planting device 4 so that the detection angle of the rolling sensor matches the setting angle of the angle setting device (the detection angle of the rolling sensor falls within the dead zone width of the setting angle), Regardless of undulations or the like, the rolling angle of the seedling planting device 4 is maintained at the setting angle of the angle setting device.

  The seedling planting device 4 includes left and right balance springs 57 that span the upper end of the link mechanism 3 and the left and right ends of the upper sliding member 34. Thus, the seedling planting device 4 is prevented from rolling unnecessarily with respect to the traveling vehicle body 1 due to a change in the left / right balance caused by the sliding of the seedling mounting platform 17 in the left / right direction.

  As shown in FIGS. 1 to 3, FIGS. 5 to 7, 12 and 13, this riding rice transplanter has a vertical length extending from the lower part to the upper side of the seedling planting device 4, and the left and right rear wheels 9 are Left and right mud removing covers 58 are provided to receive mud repelled toward the seedling planting device 4.

  The left and right mud removal covers 58 have their lower ends connected to the front lower part of the planting frame 15. Further, the upper part thereof is connected to the upper side of the planting frame 15. Specifically, the lower end portion of each mud removing cover 58 is connected to the support member 22 that forms the front lower portion of the planting frame 15 via an engaged member 59 that is bolted to the support member 22. . In addition, the left and right first fixed portions are fixed to the upper portions of the columns 23 and the cross members 24 that form the upper side of the planting frame 15 and the left and right columns 23 in the left-right orientation. The connecting member 60 is connected to the left and right center sides of the cross member 24 via left and right second connecting members 61 fixed in a hanging posture parallel to the support post 23.

  That is, the planting frame 15 supports the lower end portion of each mud removal cover 58 by the support member 22 via the left and right engaged members 59. The upper portions of the mud removal covers 58 are supported by the left and right support columns 23 and the cross member 24 via the left and right first connecting members 60 and the left and right second connecting members 61.

  The left and right engaged members 59 include engaged portions 59 </ b> A that enable insertion connection from above the lower edge portions of the corresponding mudguard covers 58. The left and right first connecting members 60 are welded on the outer end side of the airframe to the column 23, and can be connected to the upper end of the corresponding mud removal cover 58 by a bolt 62 with a knob on the end side of the airframe. A threaded portion 60A is provided. The left and right second connecting members 61 have their upper ends welded to the cross member 24, and the lower ends of the second connecting members 61 are connected to the upper portions of the corresponding mudguard covers 58 by means of bolts 62 with knobs. 61A is provided in a state of being located at the same height position as the threaded portion 60A of each first connecting member 60.

  In other words, the left and right mud removing covers 58 are connected by connecting their lower edge portions to the left and right engaged members 59 and then connecting the upper portions thereof to the corresponding connecting members 60 and 61 with bolts 62 with knobs. Thus, it can be easily attached to the planting frame 15 of the seedling planting device 4. Further, when cleaning each mud removal cover 58 and performing maintenance of the seedling planting device 4, after the connection with each connection member 60, 61 by the bolt 62 with the knob is released, to the left and right engaged members 59. Can be easily removed from the planting frame 15 of the planting device 4.

  As shown in FIGS. 2, 3, 5 to 7, 12, and 13, the left and right mud removing covers 58 are located on the rear side of the front edge 23 </ b> A of each support 23 and are on the rear surface of the seedling platform 17. A plate-like cover portion 58A facing the side, and a vertically long bulging cover portion 58B that bulges forward from the plate-like cover portion 58A and covers the corresponding column 23 from the front side. And the insertion connection location with respect to the to-be-engaged part 59A of the to-be-engaged member 59 is provided in the lower edge part of the plate-shaped cover part 58A, and the 1st connection member 60 and the 2nd connection member are provided in the upper part of the plate-like cover part 58A. 61 is provided with a bolt connection point.

  That is, while each mud removal cover 58 is formed to be wide to cover both the right and left struts 23 and is attached to the seedling planting device 4, the plate-like cover portion 58 </ b> A is more than the front edge 23 </ b> A of each strut 23. Further, by being positioned on the rear side, the space between the traveling vehicle body side and the plate-like cover portion 58A is widened. And by providing the connection part with respect to the seedling planting apparatus 4 in the plate-shaped cover part 58A, for example, each mud removal cover 58 is located in front of the front edge 23A of each support | pillar 23, for example. Compared with the case where it comprises, attachment / detachment of each mud removal cover 58 with respect to the seedling planting apparatus 4 can be made easy.

  As shown in FIGS. 1 to 3 and 5 to 7, the left and right mud removing covers 58 are in a state where the seedling planting device 4 is positioned at a work height where each leveling float 16 contacts the mud surface of the field. The upper end of each mud removal cover 58 is located above the rotation center of each rear wheel 9 and is located below the rear step 14 of the traveling vehicle body 1. And the attachment attitude | position with respect to the seedling planting apparatus 4 is set to the forward inclination attitude | position which opposes the upper half rear part of each rear-wheel 9. As shown in FIG. Further, the upper end portions 58C thereof are inclined forward largely from the lower side.

  Thereby, the extension amount to the rear-wheel side can be enlarged while shortening the extension length of those upper and lower mud removal covers 58 upward. As a result, the mud removal covers 58 can be well received by the mud removal covers 58 while the rear wheels 9 repel toward the seedling planting device 4 while reducing the size and weight of each mud removal cover 58. Mud adhesion to the back side of the planting device 4 can be effectively suppressed.

  By the way, in the riding rice transplanter, when performing maintenance of the seedling planting device 4 or when the riding rice transplanter is stored in a barn or the like, the seedling planting device 4 is moved to each rear wheel by the downward swing of the link mechanism 3. The ground leveling float 16 may be lowered and swung down to the lower limit position where the ground leveling float 16 is grounded in a horizontal posture at a grounding height position of 9. And when the seedling planting device 4 is swung down to the lower limit position in this way, the upper side of the seedling planting device 4 comes closest to the left and right rear wheels 9, so that There is a possibility that the upper side of the attaching device 4 contacts the left and right rear wheels 9.

  Therefore, in the riding rice transplanter, the upper side of the seedling planting device 4 and the left and right rear wheels 9 that are closest to each other in the lower limit lowered state of the seedling planting device 4 in which the seedling planting device 4 is swung down to the lower limit position. Between the traveling vehicle body 1 and the seedling planting device 4 by unnecessarily increasing the separation distance between the traveling vehicle body 1 and the seedling planting device 4. Avoiding the possibility of the upper side of the seedling planting device 4 coming into contact with the left and right rear wheels 9 while preventing a decrease in workability when the seedling is replenished to the seedling mount 17 of the seedling planting device 4 from the traveling vehicle body 1. I am doing so.

  However, in such a riding rice transplanter, if the mud removal cover 58 described above is simply provided between the left and right rear wheels 9 and the seedling planting device 4, the upper side of the seedling planting device 4 and the left and right sides The contact avoidance gap secured between the rear wheel 9 needs to be increased in order to allow the mud removal cover 58 to be equipped. For this reason, the distance between the traveling vehicle body 1 and the seedling planting device 4 becomes large, which may lead to an increase in the size of the riding rice transplanter and a decrease in workability for replenishing seedlings from the traveling vehicle body 1 to the seedling mount 17. There is.

  Considering this point, in this riding rice transplanter, the left and right mud removing covers 58 attached to the seedling planting device 4 are configured as follows.

  As shown in FIGS. 3, 5 to 7, and 13, the left and right mud removal covers 58 are arranged on the bulging cover portion 58 </ b> B that is a portion facing the corresponding rear wheel 9, and the upper side of the seedling planting device 4 is left and right. A notch 58D for the rear wheel is provided to avoid contact with the left and right rear wheels 9 in the lower limit lowered state in which the seedling planting device 4 is lowered to the lower limit position closest to the rear wheel 9. Specifically, in the lower limit lowering state of the seedling planting device 4, the upper part of each column 23 positioned just behind each rear wheel 9 as the upper side of the seedling planting device 4 comes closest to the left and right rear wheels 9. Accordingly, a notch portion 58D for the rear wheel is formed by notching the upper end portion of the bulging cover portion 58B located between the rear wheel 9 closest to the left and right mud removal covers 58 and the upper portion of the support column 23. doing.

  As a result, the right and left rear wheels 9 and the upper portions of the columns 23 that are closest to each other in the lower limit lowered state of the seedling planting device 4, as in the case where the left and right mud removal covers 58 are not provided with the notch portions 58 </ b> D for the rear wheels, The left and right rear wheels 9 come into contact with the left and right mud removing covers 58 in the lower limit lowered state of the seedling planting device 4 even if the clearance secured between the two is not increased to allow the mud removing cover 58 to be installed. Fear can be avoided.

  As a result, the left and right mud removing covers 58 are provided between the traveling vehicle body 1 and the seedling planting device 4, but there is no need to increase the separation distance between the traveling vehicle body 1 and the seedling planting device 4. Therefore, it is possible to avoid an increase in the size of the riding rice transplanter and a decrease in seedling replenishment workability from the traveling vehicle body 1 to the seedling mount 17 due to an increase in the distance between the traveling vehicle body 1 and the seedling planting device 4. be able to.

  The lower limit lowering state of the seedling planting device 4 is a state that is performed when maintenance of the seedling planting device 4 is performed or when the riding rice transplanter is stored in a barn or the like as described above, and the machine body is not run. Since it is in a state, even if each rear wheel 9 is engaged with the notch 58D of each mud removal cover 58, it causes trouble in preventing mud from adhering to the back side of the seedling planting device 4. There is nothing.

  As shown in FIGS. 3 and 5 to 7, the left mud removing cover 58 has an operation tool A extending from the seedling planting device 4 toward the traveling vehicle body 1 at the lower end portion of the machine body. A first cutout portion 58E for an operating tool that allows installation of the lateral feed amount adjusting lever 40 as an example is provided. Further, the left and right mud removing covers 58 are provided with second notch portions 58 </ b> F for props that allow the connection of the respective props 23 to the support member 22 at the outer end side portion of the machine body at the lower ends thereof.

  In the mud removal cover 58 on the left side, the first notch 58E for the operation tool allows the horizontal feed amount adjusting lever 40 to swing in the left-right direction and supports the lateral feed amount adjusting lever 40. The entire member 41 is opened to the front of the seedling planting device 4 so that the bolt 63 connecting the lever support member 41 to the support member 22 has a lateral width that enables operation from the front of the seedling planting device 4. Forming.

  In the left and right mud removal covers 58, the second notch 58 </ b> F for the support opens the entire connecting member 26 for the lower part welded to the lower part of the support 23 to the front of the seedling planting device 4. The lower connecting member 26 is formed so as to have a lateral width that enables a connecting operation from the front of the seedling planting device 4 when connecting the bolts.

  The left and right connecting members 26 for the left and right are arranged in the upper and lower directions from the front of the seedling planting device 4 of the float cover 65 that receives the mud repelled by the left and right rear wheels 9 toward the left and right leveling floats 16. The connecting portion 26 </ b> A that enables the connection with the bolt 64 is provided.

  In other words, the left and right mud removal covers 58 are provided for attaching / detaching the support columns 23 and the lever support member 41 to / from the support member 22 from the front of the seedling planting device 4 and attaching / detaching the float cover 65 to / from the lower connecting members 26. Further, the left mud removing cover 58 is attached to and detached from the support member 22 from the front of the seedling planting device 4, and the lateral feed amount adjusting lever 40 is attached to and detached from the lever support member 41. While being able to work and swinging the lateral feed amount adjusting lever 40 from the traveling vehicle body side, it is formed in a shape having a wide lateral width and a large mud receiving area.

  As a result, the left and right mud removing covers 58 having a large mud receiving area can be provided without impairing the detachability of each support column 23 and the lever support member 41 and the operability of the lateral feed amount adjusting lever 40. Mud adhesion to the back side of the planting device 4 can be more effectively suppressed.

  As shown in FIGS. 2 and 5, when the left and right markers 51 are switched to the standing posture, the middle part of their swinging arm parts 51 </ b> A protrudes rearward and upward, These swinging arm portions 51A are bent in a V shape. Thereby, in a state where auxiliary rear wheels (not shown) are attached to the lateral outer sides of the left and right rear wheels 9, the left and right markers 51 are switched to the standing posture, and the seedling planting device 4 is swung down to the lower limit position. In such a case, the left and right markers 51 are configured to bypass the left and right auxiliary rear wheels so as to bypass the left and right auxiliary rear wheels.

  [Second Embodiment]

  Hereinafter, as an example of an embodiment for carrying out the present invention, a second embodiment in which the present invention is applied to a riding rice transplanter for 8-row planting that is an example of a riding rice transplanter will be described with reference to the drawings.

  In addition, the riding rice transplanter for 8-row planting described in the second embodiment is the same as the riding rice transplanter for 6-row planting described in the first embodiment. Since the configuration of the seedling planting apparatus such as the cover is different, only the configuration of the seedling planting apparatus will be described below. Further, in the seedling planting device for 8-row planting described in the second embodiment, the same configuration as the seedling planting device for 6-row planting described in the first embodiment is described above. The drawings (for 6-row planting) used in one embodiment will be used for explanation.

  As shown in FIG. 1, FIG. 14 and FIG. 15, a seedling planting device for eight-row planting equipped with the same configuration as a riding rice transplanter for six-row planting so as to be swingable up and down and to be able to roll at the rear part of the traveling vehicle body 1. 4 includes five leveling floats 16 and 8 for leveling a field mud surface such as a planting planned planting site by sliding on the field 15 as the traveling vehicle body 1 travels on the planting frame 15 forming the framework. A seedling stage 17 on which mat-like seedlings can be placed, a lateral feed mechanism 18 that reciprocates the seedling stage 17 in a left-right direction with a constant stroke, and a seedling stage each time the seedling stage 17 reaches the left and right stroke ends. A vertical feed mechanism 19 that vertically feeds each of the mat-shaped seedlings above to the lower end of the seedling mounting base 17, and a predetermined amount of seedlings are cut from the lower end of each mat-shaped seedling placed on the seedling mounting base 17. 8 rotary types to be planted in the field mud after leveling Planting a maximum of eight seedlings with a planting mechanism 20 and a power distribution case 21 incorporating a power distribution mechanism (not shown) for distributing power from the traveling vehicle body 1 to each mechanism 18-20. Is configured to do.

  As shown in FIGS. 14 to 16, the planting frame 15 is provided on the front and lower parts of the seedling planting device 4 with a square pipe-shaped support member 22 that is long on the left and right, on both left and right sides of the support member 22, and on the right and left central right sides. Three support columns 23 erected in a forward inclined posture, a cross member 24 installed over the upper portions of the support columns 23, and a rearward arrangement extending from the support member 22 in a laterally spaced arrangement. Four transmission cases 25 are provided. And the support member 22 is provided with the power distribution case 21 connected with the link mechanism 3 via the support shaft (not shown) in the front-back direction at the left-right intermediate part of the support member 22, so that the support member 22 is connected to each column 23 and each transmission. It is configured to function as a main member that supports the case 25 and the like. In addition, planting mechanisms 20 are provided on both the left and right sides of the rear end of each transmission case 25.

  Each strut 23 is welded to the lower part thereof with a lower connecting member 26 that enables bolt connection with the support member 22. Further, an upper connecting member 27 that enables bolt connection with the cross member 24 is welded to the upper part thereof. And it arrange | positions in the position which left | separated from right behind the right-and-left rear wheel 9 in the left-right direction by providing the right-and-left space | interval suitable for supporting the seedling mounting stand 17 for 8 stripes.

  As shown in FIG. 14 and FIG. 15, each leveling float 16 has a corresponding support arm 29 among the five sets of support arms 29 extending rearward and downward from the left and right float fulcrum shafts 28. A free end portion (rear end portion) is connected via a left and right support shaft 30 so as to be able to swing up and down with the support shaft 30 as a fulcrum. The float fulcrum shaft 28 is equipped with a planting depth adjustment lever 31 that swings integrally with each support arm 29 via the float fulcrum shaft 28 so as to extend forward and upward from the float fulcrum shaft 28. The planting depth adjustment lever 31 can be held at an arbitrary operation position by engagement with a lever guide 32 erected on the support member 22.

  From this configuration, the height position of each leveling float 16 with respect to each planting mechanism 20 can be integrally changed by swinging the planting depth adjusting lever 31 in the vertical direction. The planting depth of the seedling to the field by the planting mechanism 20 can be adjusted. Then, after this adjustment, the planting depth adjusting lever 31 is engaged with the lever guide 32 at an arbitrary operation position, whereby the planting depth of the seedling to the field by each planting mechanism 20 is engaged at that time. The planting depth corresponding to the position can be set and held.

  As shown in FIGS. 14 and 15, the seedling placing stand 17 is provided in the seedling planting device 4 in a front rising posture extending from the rear lower part of the seedling planting device 4 toward the boarding operation unit 10 of the traveling vehicle body 1. ing. Then, a horizontally long lower sliding member 33 is provided at the lower end of the rear surface over the left and right ends of the seedling table 17. Further, a horizontally long upper sliding member 34 is provided on the upper side of the rear surface over the left and right end portions of the seedling mount 17. The lower sliding member 33 is slidably mounted on the left-right sliding rail 35 in the left-right direction. The slide rail 35 is attached to the front and rear intermediate portions of each transmission case 25 via a seedling removal amount adjusting mechanism 36. The upper sliding member 34 includes a fitting rail portion whose side view has a downward U-shape. The fitting rail portions are externally fitted to the six guide rollers 37 provided in the cross member 24 in a state in which the fitting rail portions are arranged at a predetermined interval in the left-right direction so as to be relatively slidable in the left-right direction from above.

  That is, the lower side of the seedling table 17 is received and supported by the slide rail 35 from below, and the upper side of the seedling table 17 is supported by the left and right support columns 23 via the cross member 24 and the four guide rollers 37. By receiving and supporting from below, the seedling planting device 4 is equipped with a seedling mount 17 in a forwardly raised posture so as to be slidable in the left-right direction.

  As shown in FIG. 14, the seedling amount adjustment mechanism 36 is linked to a seedling amount adjustment lever 38 that is arranged on the right side of the planting depth adjustment lever 31 so as to be swingable up and down. Then, by this linkage, the height position of the slide rail 35 with respect to each transmission case 25 is changed in conjunction with the vertical swing operation of the seedling amount adjustment lever 38. The seedling removal amount adjusting lever 38 can be held at an arbitrary operation position by the engagement with the lever guide 32 described above.

  From this configuration, the height position of the seedling placing stand 17 with respect to each planting mechanism 20 provided in each transmission case 25 can be changed by swinging the seedling collection amount adjusting lever 38 in the vertical direction. Thus, the amount of seedling taken from each mat-like seedling placed on the seedling placing stand 17 by each planting mechanism 20 can be adjusted. Then, after this adjustment, the seedling amount adjustment lever 38 is engaged with the lever guide 32 at an arbitrary operation position, so that the amount of seedling taken from each mat-like seedling by each planting mechanism 20 is engaged at that time. The seedling removal amount corresponding to the position can be set and held.

  As shown in FIGS. 4 and 15, the lateral feed mechanism 18 includes a gear-type lateral feed transmission unit (not shown) that changes the lateral feed speed of the seedling platform 17, and a lateral feed by a sliding operation in the left-right direction. A shift operation shaft 39 that shifts the transmission portion, a detent portion (not shown) that engages and holds the shift operation shaft 39 at an arbitrary operation position, and the like are provided. The lateral feed transmission unit and the detent unit are built in the power distribution case 21. The speed change operation shaft 39 extends leftward from the power distribution case 21. Further, a lateral feed amount adjusting lever 40 that enables operation of the speed change operation shaft 39 from the traveling vehicle body side is linked to the left end portion thereof. The lateral feed amount adjusting lever 40 is mounted on the lever support member 41 bolted to the support member 22 described above so as to be able to swing left and right in a front-to-back posture extending from the seedling planting device 4 toward the traveling vehicle body 1. Yes. The rear end portion is linked to the left end portion of the speed change operation shaft 39.

  From this configuration, the horizontal feed rate adjusting lever 40 is swung in the left-right direction, so that the horizontal feed rate of the seedling mounting base 17 with respect to the seedling planting rate of each planting mechanism 20 can be changed stepwise. Thus, it is possible to change the number of seedlings picked up by each planting mechanism 20 with respect to the lateral width of each mat-like seedling placed on the seedling placing stand 17.

  As shown in FIGS. 14 and 15, the seedling planting device 4 has a T-shaped center float 16 </ b> A for two-level leveling arranged at the left and right centers as a leveling float 16, with a predetermined interval on the left and right of the center float 16 </ b> A. There are provided a U-shaped side float 16B for single-level grading to be deployed, and a T-shaped side float 16C for two-level grading to be deployed at a predetermined interval on the lateral outer side of the side float 16B.

  Although illustration is omitted, the traveling vehicle body 1 is provided with a working operation lever in the boarding operation unit 10. The operation lever is configured to be able to switch and hold between an ascending position, a neutral position, a descending position, and a planting position. And it is linked via a mechanical linkage mechanism for manual lifting to a lifting control valve that controls the flow of oil to the lifting cylinder 2. Moreover, it links with the planting clutch which interrupts transmission to the seedling planting apparatus 4 via the mechanical linkage mechanism for clutch operation. Further, it is linked to the link mechanism 3 via a mechanical linkage mechanism for neutral return. The control valve for raising and lowering is provided with a mechanical linkage mechanism 42 (see FIG. 14) for automatically raising and lowering the center float 16A that functions as a sensor float that senses changes in the depth of mud in the field due to ups and downs of the field tiller. Are linked through.

From this configuration, when the operating lever is operated to the raised position, the control valve is switched to a supply state in which oil is supplied to the lifting cylinder 2 by the action of a mechanical linkage mechanism for manual lifting. Thereby, the raising / lowering cylinder 2 is contracted, and the seedling planting device 4 moves up and swings together with the link mechanism 3.
When the seedling planting device 4 together with the link mechanism 3 reaches the upper limit position due to the upward swing, the operation lever swings back from the upward position to the neutral position by the action of the mechanical linkage mechanism for neutral return, and for manual lifting and lowering. By the action of the mechanical linkage mechanism, the control valve is switched to a stop state in which the supply and discharge of oil to and from the lifting cylinder 2 is stopped. Thereby, the raising / lowering cylinder 2 stops operation | movement, and the seedling planting apparatus 4 with the link mechanism 3 stops automatically in an upper limit position.
When the operation lever is operated from the neutral position to the lowered position, the control valve is switched to a discharge state in which oil is discharged from the lift cylinder 2 by the action of a mechanical linkage mechanism for manual lift. Thereby, the raising / lowering cylinder 2 is extended, and the seedling planting device 4 together with the link mechanism 3 swings downward.
When the center float 16A is grounded by this downward swing, the control valve is operated in accordance with the grounding posture of the center float 16A by the action of the automatic lifting mechanical linkage mechanism 42 which has priority over the manual lifting mechanical linkage mechanism. It automatically switches to a discharge state, a stop state, and a supply state.
Specifically, when the center float 16A is lowered forward from the reference posture, the control valve is automatically switched to the discharge state, whereby the elevating cylinder 2 is extended to operate the seedling planting device 4 together with the link mechanism 3. Swing down.
On the contrary, when the center float 16A rises forward from the reference posture, the control valve is automatically switched to the supply state, whereby the elevating cylinder 2 is contracted and the seedling planting device 4 is moved up and down together with the link mechanism 3. Move.
When the center float 16A reaches the reference posture, the control valve automatically switches to a stopped state, whereby the lifting cylinder 2 stops its operation, and the seedling planting device 4 together with the link mechanism 3 stops the swinging motion. To do.
When the operation lever is operated from the lowered position to the planting position, the planting clutch can be switched from the disconnected state to the connected state while maintaining the state in which the mechanical linkage mechanism 42 for automatic lifting and lowering is operated. Can be activated.
When the operation lever is operated from the planting position to the lowered position, the planting clutch can be switched from the connected state to the disconnected state while maintaining the state in which the mechanical linkage mechanism 42 for automatic lifting and lowering is operated. Can be stopped.
When the operation lever is operated from the lowered position to the raised position, as described above, the seedling planting device 4 moves up and swings together with the link mechanism 3, and when the seedling planting device 4 together with the link mechanism 3 reaches the upper limit position, The operation lever swings back from the raised position to the neutral position, and the seedling planting device 4 together with the link mechanism 3 automatically stops at the upper limit position.

  In other words, at the time of planting work in which the operation lever is operated to the planting position, the planting planting is performed according to the mud depth of the field that changes due to the ups and downs of the field cultivator due to the action of the mechanical linkage mechanism 42 for automatic lifting and lowering. The device 4 can be automatically swung up and down, whereby each leveling float 16 can be maintained in the reference posture, and as a result, the mud depth of the field changes due to the ups and downs of the field cultivator and the like. Regardless, the planting depth of the seedlings by each planting mechanism 20 can be kept constant.

  As shown in FIGS. 8 to 10 and FIG. 14, the mechanical linkage mechanism 42 for automatic lifting and lowering includes a linkage wire 43, one end portion of the outer wire 43 </ b> A in the linkage wire 43, and a free end portion (front end portion) of the leveling float 16 at the left and right center. ), A fixing mechanism 45 that fixes one end of the inner wire 43B of the connecting wire 43 at a predetermined position with respect to the seedling planting device 4, and the like.

  The linking member 44 is made of a strip steel material that is bent and formed in a downward U-shape when viewed in the front-rear direction. And the longitudinally long hole 44A is provided in the both right and left sides.

  The fixing mechanism 45 includes a fixing member 46 fixed to the support member 22 which is a fixing part of the seedling planting device 4, and a longitudinal balance that swings up and down with respect to the fixing member 46 with a supporting shaft 47 facing left and right. A swing shaft 48, a left and right connecting shaft 49 that connects one end of the inner wire 43 B to the front end of the balance swing member 48 through the elongated hole 44 A of the linkage member 44, and the rear end of the balance swing member 48 A connecting rod 50 that links the portion to the planting depth adjusting lever 31 is provided. The amount of protrusion of the inner wire 43B from one end portion of the outer wire 43A connected to the linkage member 44 regardless of the change in the reference height of each leveling float 16 accompanying the planting depth adjustment lever 31 by the planting depth adjustment lever 31. Is configured to be constant.

  The mechanical linkage mechanism 42 for automatic lifting and lowering is a projection amount of the inner wire 43B from one end portion of the outer wire 43A connected to the linkage member 44 by a swinging operation of a sensitivity adjustment lever (not shown) provided in the boarding operation unit 10. Can be changed. By changing the protrusion amount, the reference posture of the leveling float 16 at the center of the left and right can be changed, and the detection sensitivity of the leveling float 16 at the center of the left and right can be changed. The leveling float 16 at the center of the left and right becomes more sensitive as the inner wire 43B protrudes from one end of the outer wire 43A connected to the linkage member 44 and the reference posture is changed in the forward downward direction. On the contrary, the sensitivity of detection becomes insensitive as the amount of protrusion of the inner wire 43B from one end of the outer wire 43A connected to the linkage member 44 is shortened and the reference posture is changed in the upward direction.

  That is, due to the operation of the fixing mechanism 45 described above, the reference of the leveling float 16 at the center of the left and right regardless of the change in the reference height of each leveling float 16 accompanying the planting depth adjustment by the planting depth adjustment lever 31. The posture can be made constant, and the sensitivity of the leveling float 16 at the center of the left and right can be kept constant.

  As shown in FIGS. 8 to 10, the connecting rod 50 is formed in a lateral J shape in which both end portions 50A and 50B extend leftward from the intermediate portion 50C. The one end portion 50A is inserted into and engaged with the rear end portion of the balance swinging member 48, and the other end portion 50B is inserted into and engaged with the proximal end side of the planting depth adjusting lever 31, so that the balance is shaken. The rear end portion of the moving member 48 is linked to the planting depth adjustment lever 31.

  That is, the connecting rod 50 is formed in a lateral J-shape in which both end portions 50A and 50B extend leftward from the intermediate portion 50C, so that the rear end portion of the balance swinging member 48 is planted deeply by the connecting rod 50. When linking to the base end side of the height adjusting lever 31, by inserting the linking rod 50 from the right side of the seedling planting device 4 toward the balance swinging member 48 and the planting depth adjusting lever 31, The insertion engagement of the one end portion 50A with the rear end portion of the balance swinging member 48 and the insertion engagement of the other end portion 50B with the planting depth adjusting lever 31 can be performed at once.

  As a result, the linkage rocking member 48 and the planting depth adjusting lever 31 can be easily linked from the right side of the seedling planting device 4 by the linkage rod 50, and a mechanical linkage mechanism 42 for automatic lifting and lowering. The assembly | attachment property of the linkage rod 50 in can be improved.

  The linkage rod 50 includes an inclined portion 50D that is inclined outwardly between the one end portion 50A and the intermediate portion 50C. Accordingly, when the leveling float 16 at the center of the left and right is greatly swung up and down, the upward bulging portion 16a at the periphery of the free end portion is configured to be difficult to contact the linkage rod 50.

  As shown in FIG. 14, the seedling planting device 4 is provided with markers 51 that form a running reference index for the next stroke on the mud surface of the field on the left and right sides thereof. The left and right markers 51 are placed on the left and right corresponding ends of the support member 22 of the seedling planting device 4, and are stood up along the seedling planting device 4. It is connected so as to be able to swing up and down over the overhanging posture for forming the indicator.

  Although not shown in the drawings, this riding rice transplanter includes left and right tension springs that downwardly bias the left and right markers 51 toward the lying posture, and left and right first wire linkage mechanisms that link the left and right markers 51 to the link mechanism 3. The left and right swing locks that are locked and biased to be locked to the base end portions of the corresponding markers 51 as the left and right markers 51 reach the standing posture, and the above-described operation for work. A left and right second wire-type linkage mechanism that links the lever and the left and right swing locks is provided.

  As a result, when the work lever is operated to the raised position and the seedling planting device 4 is lifted and swung toward the upper limit position during the work travel in which one of the left and right markers 51 is switched to the lying posture, By the action of the first wire type linkage mechanism, the marker 51 in the lying posture can be erected and oscillated toward the erecting posture in conjunction with the ascending and oscillating in the non-working height region of the seedling planting device 4. When the marker 51 reaches the standing posture by the standing swing, the marker 51 that has reached the standing posture can be fixedly held in the standing posture by the action of the corresponding swinging locking tools on the left and right. Then, after operating the work lever to the lowered position and lowering the seedling planting device 4 to the work height position where each leveling float 16 contacts the ground, the work lever is operated to the planting position and either left or right is not yet operated. When the swinging operation is performed on the planting side, the left and right corresponding tension springs can be released by the action of the corresponding left and right second wire-type linkage mechanisms in the standing posture of the marker 51 positioned on the non-planting side. By the above action, the marker 51 on the non-planting side, which has been released from the fixed holding in the standing posture, can be rocked in a lying manner toward the lying posture.

  As shown in FIGS. 11 and 14 to 16, the seedling planting device 4 includes left and right locking members 52 that lock and hold the free end sides of the left and right markers 51 switched to the standing posture. Each locking member 52 is bent into a shape having a hook 52A for locking the marker at one end and a J-shaped mounting portion 52B for the connecting member 27 for the upper portion at the other end. Made of round steel bar. Each upper connecting member 27 includes a receiving portion 27A for positioning the locking member 52 in the left-right direction by receiving an end surface 52C on the mounting portion side of the locking member 52, and a mounting portion 52B for the locking member 52. The engaging portion 27B for positioning the locking member 52 in the front-rear direction by the engagement of the engaging member 52 and the mounting portion 52B of the locking member 52 are sandwiched between a bolt as the fastener 53 for attaching the locking member. Accordingly, a holding portion 27C for positioning the locking member 52 in the vertical direction is provided.

  With this configuration, the free end side of each marker 51 is locked to the hook portion 52A of the corresponding locking member 52 by human operation when traveling on the road, transporting by truck, or storing in a barn or the like. Thus, it is possible to prevent rolling or the like caused by vibration of the airframe of each marker 51 switched to the standing posture. Thereby, the contact with the other thing resulting from the rolling of each marker 51 switched to the standing posture can be prevented. In addition, the left and right locking members 52 can be properly attached to the predetermined positions of the seedling planting device 4 without misalignment, whereby the left and right markers 51 locked to the hook portions 52A of the respective locking members 52 are attached to the seedlings. The planting device 4 can be locked and held at an appropriate position.

  As shown in FIGS. 14 and 15, the link mechanism 3 is provided with a rolling motor 54 formed of an electric motor at the upper rear end. The rolling motor 54 performs the rolling operation of the seedling planting device 4 via the buffer spring 56 installed over the respective connecting wires 55 and the cross member 24 by turning the left and right connecting wires 55 back and forth. It is configured as follows. And based on the output of the angle setter (not shown) that sets the rolling angle of the seedling planting device 4 and the output of the rolling sensor (not shown) that detects the rolling angle of the seedling planting device 4, By performing the rolling operation of the seedling planting device 4 so that the detection angle of the rolling sensor matches the setting angle of the angle setting device (the detection angle of the rolling sensor falls within the dead zone width of the setting angle), Regardless of undulations or the like, the rolling angle of the seedling planting device 4 is maintained at the setting angle of the angle setting device.

  The seedling planting device 4 includes left and right balance springs 57 that span the upper end of the link mechanism 3 and the left and right ends of the upper sliding member 34. Thus, the seedling planting device 4 is prevented from rolling unnecessarily with respect to the traveling vehicle body 1 due to a change in the left / right balance caused by the sliding of the seedling mounting platform 17 in the left / right direction.

  As shown in FIGS. 14 to 18, this riding rice transplanter has a vertical length extending from the lower part to the upper side of the seedling planting device 4, and the left and right rear wheels 9 repel toward the seedling planting device 4. Left and right mud removal covers 58 for receiving mud are provided.

  As shown in FIGS. 15 to 17, the left and right mud removing covers 58 have their lower ends connected to the front lower part of the planting frame 15. Further, the upper part thereof is connected to the upper side of the planting frame 15. Specifically, the lower end portion of each mud removing cover 58 is connected to the support member 22 that forms the front lower portion of the planting frame 15 via an engaged member 59 that is bolted to the support member 22. . And the upper part of the left mud removal cover 58 was fixed to the upper part of the left end side support | pillar 23 and the cross member 24 which form the upper part side of the planting frame 15 to the upper part of the left end side support | pillar 23 in the left-right orientation. The first connection member 60 on the left side and the left and right center left side of the cross member 24 are connected via a second connection member 61 fixed in a hanging posture parallel to the support column 23. Further, the upper part of the right mud removing cover 58 is directed to the upper part of the right end side pillar 23 forming the upper side of the planting frame 15 and the upper part of the right and left central right side pillar 23, and to the left side of the upper part of these pillars 23. They are connected via two first connecting members 60 fixed in the posture.

  That is, the planting frame 15 supports the lower end portion of each mud removal cover 58 by the support member 22 via the left and right engaged members 59. The upper part of the left mud removing cover 58 is supported by the left and right support columns 23 via the left first connecting member 60 and the second connecting member 61. Further, the upper portion of the right mud removing cover 58 is supported by the two right support columns 23 via the two right first connecting members 60.

  The left and right engaged members 59 include engaged portions 59 </ b> A that enable insertion connection from above the lower edge portions of the corresponding mudguard covers 58. Each first connecting member 60 is welded at its left and right ends to the column 23 and is screwed into the left and right other ends to enable connection with the upper part of the corresponding mudguard cover 58 by a bolt 62 with a knob. 60A is provided. The second connecting member 61 is welded at its upper end to the cross member 24, and at its lower end, a threaded portion 61A that enables connection with the upper part of the left mud removing cover 58 by means of a bolt 62 with a knob, The first connecting member 60 is provided in a state of being located at the same height position as the screwing portion 60A.

  In other words, the left and right mud removing covers 58 are connected by connecting their lower edge portions to the left and right engaged members 59 and then connecting the upper portions thereof to the corresponding connecting members 60 and 61 with bolts 62 with knobs. Thus, it can be easily attached to the planting frame 15 of the seedling planting device 4. Further, when cleaning each mud removal cover 58 and performing maintenance of the seedling planting device 4, after the connection with each connection member 60, 61 by the bolt 62 with the knob is released, to the left and right engaged members 59. Can be easily removed from the planting frame 15 of the planting device 4.

  As shown in FIGS. 14 to 16 and 18, the left and right mud removing covers 58 are positioned on the rear side of the front edge 23 </ b> A of each support 23 and are opposed to the back side of the seedling platform 17. And a vertically long bulging cover portion 58B that bulges forward from the plate-like cover portion 58A and covers the corresponding column 23 from the front side.

  With this configuration, in a state where each mud removal cover 58 is attached to the seedling planting device 4, the plate-like cover part 58 </ b> A occupying most of each mud removal cover 58 is located on the rear side of the front edge 23 </ b> A of each column 23. Will come to do. And as mentioned above, in this seedling planting apparatus 4 for 8-row planting, since each support | pillar 23 is arrange | positioned in the position which left | separated from right behind the right-and-left rear wheel 9 in the left-right direction, each support | pillar 23 The bulging cover portions 58B that cover the left and right rear wheels 9 also disengage in the left-right direction from right behind the left and right rear wheels 9, and the plate-like cover portions 58A that are located on the rear side of the front edges 23A of the columns 23 face the left and right rear wheels 9. Will come to do.

  Thereby, the lower limit which lowered | hung the seedling planting apparatus 4 to the lower limit position where the upper side of the seedling planting apparatus 4 approaches the left and right rear wheels 9 between the left and right rear wheels 9 and the left and right mud removing covers 58. For example, the left and right mud removing covers 58 are entirely attached to the respective columns 23 while securing a gap for avoiding contact between the left and right rear wheels 9 and the left and right mud removing covers 58 that may occur in the lowered state. Compared with the case where it is configured to be positioned in front of the front edge 23 </ b> A, the seedling planting device 4 together with the left and right mud removing covers 58 can be mounted closer to the traveling vehicle body.

  As a result, the left and right mud removing covers 58 are provided between the traveling vehicle body 1 and the seedling planting device 4, but there is no need to increase the separation distance between the traveling vehicle body 1 and the seedling planting device 4. Therefore, it is possible to avoid an increase in the size of the riding rice transplanter and a decrease in seedling replenishment workability from the traveling vehicle body 1 to the seedling mount 17 due to an increase in the distance between the traveling vehicle body 1 and the seedling planting device 4. be able to.

  In addition, the lower limit lowering state of the seedling planting device 4 is a state to be performed when the seedling planting device 4 is maintained or when the riding rice transplanter is stored in a barn or the like. In this state, each leveling float 16 is The rear wheels 9 are set to be grounded in a horizontal posture at the ground contact height position.

  As shown in FIGS. 15 to 18, the left and right mud removing covers 58 are provided with an insertion connecting portion of the engaged member 59 with respect to the engaged portion 59 </ b> A at the lower edge portion of the plate-like cover portion 58 </ b> A. A bolt connection portion with the first connection member 60 or the second connection member 61 is provided on the upper part of 58A.

  In other words, in the left and right mud removal covers 58, a plate-shaped cover that is located on the rear side of the front edge 23A of each support 23 and is widened between the traveling vehicle body side when attached to the seedling planting device 4. Since the portion 58A is provided with a connecting portion for the seedling planting device 4, each mud removing cover 58 is configured so that the whole of them is positioned on the front side of the front edge 23A of each column 23. The mud removal covers 58 can be easily attached to and detached from the seedling planting device 4.

  As shown in FIG. 1 and FIGS. 14 to 16, the left and right mud removing covers 58 are provided in the state where the seedling planting device 4 is positioned at a working height at which each leveling float 16 contacts the mud surface of the field. The upper end of the removal cover 58 is configured to be located above the rotation center of each rear wheel 9 and below the rear step 14 of the traveling vehicle body 1. And the attachment attitude | position with respect to the seedling planting apparatus 4 is set to the forward inclination attitude | position which opposes the upper half rear part of each rear-wheel 9. As shown in FIG. Further, the upper end portions 58C thereof are inclined forward largely from the lower side.

  Thereby, the extension amount to the rear-wheel side can be enlarged while shortening the extension length of those upper and lower mud removal covers 58 upward. As a result, the mud removal covers 58 can be well received by the mud removal covers 58 while the rear wheels 9 repel toward the seedling planting device 4 while reducing the size and weight of each mud removal cover 58. Mud adhesion to the back side of the planting device 4 can be effectively suppressed.

  As shown in FIGS. 15 and 16, the left mud removing cover 58 is an example of the operation tool A that extends from the seedling planting device 4 toward the traveling vehicle body 1 at the lower end portion of the machine body. A first cutout portion 58E for an operating tool that allows installation of a certain lateral feed amount adjusting lever 40 is provided. Further, a second notch portion 58 </ b> F for a column that allows connection of the column 23 on the left end side to the support member 22 is provided on the outer end side portion of the machine body at the lower end portion. The right mud removing cover 58 is provided with a second notch portion 58 </ b> F for a column that allows the connection of each column 23 to the support member 22 at both left and right end portions of the lower end portion thereof. The first cutout portion 58E and the second cutout portion 58F have the same cut length in the lateral direction from the lateral end of the mudguard cover 58, and upward from the lower end of the mudguard cover 58. The cut length is the same.

  In the mud removal cover 58 on the left side, the first notch 58E for the operation tool allows the horizontal feed amount adjusting lever 40 to swing in the left-right direction and supports the lateral feed amount adjusting lever 40. The entire member 41 is opened to the front of the seedling planting device 4 so that the bolt 63 connecting the lever support member 41 to the support member 22 has a lateral width that enables operation from the front of the seedling planting device 4. Forming.

  In the left and right mud removal covers 58, the second notch 58 </ b> F for the support opens the entire connecting member 26 for the lower part welded to the lower part of the support 23 to the front of the seedling planting device 4. The lower connecting member 26 is formed so as to have a lateral width that enables a connecting operation from the front of the seedling planting device 4 when connecting the bolts.

  The lower connecting members 26 at the left and right end sides are provided at their upper end portions by vertical bolts 64 of the float cover 65 that catch mud that the left and right rear wheels 9 repel toward the side floats 16C at the left and right end sides. A connecting portion 26A that enables connection is provided.

  In other words, the left and right mud removing covers 58 are attached to the support member 22 from the front of the seedling planting device 4 and attached to the support member 22 and the lever support member 41, and the float cover 65 is attached to the lower connecting member 26 on the left and right ends. Further, the left mud removing cover 58 can be attached to and detached from the front of the seedling planting device 4, and the lever support member 41 can be attached to and detached from the front of the seedling planting device 4 and the lateral feed amount adjusting lever to the lever support member 41. While being capable of attaching / detaching 40 and swinging operation of the lateral feed amount adjusting lever 40 from the traveling vehicle body side, it is formed in a shape having a wide lateral width and a large mud receiving area.

  As a result, the left and right mud removing covers 58 having a large mud receiving area can be provided without impairing the detachability of each support column 23 and the lever support member 41 and the operability of the lateral feed amount adjusting lever 40. Mud adhesion to the back side of the planting device 4 can be more effectively suppressed.

  As shown in FIGS. 15 to 17, the left and right engaged members 59 to which the lower edge portion of the corresponding mudguard cover 58 is inserted and connected are left and right toward the left and right side floats 16B adjacent to the left and right of the center float 16A. The rear wheel 9 is configured to function as a float cover that catches mud splashed. Thereby, the structure can be simplified and the cost can be reduced by reducing the number of parts by using the left and right engaged members 59 as the left and right float covers.

  As shown in FIGS. 15 and 16, the seedling planting device 4 includes left and right leveling tools 66 extending from the front end of the support member 22 and leveling between adjacent side floats 16B and 16C on both the left and right sides. I have. The left and right leveling tools 66 include a connecting portion 66 </ b> A that is bolted to the front end of the support member 22 at their rear ends.

  The left and right mud removal covers 58 have a space between the lower end thereof and the front end of the support member 22 to allow connection and release from the lower side of the connection portion 66A of each leveling tool 66 with respect to the front end of the support member 22. A forward bulging portion 58G to be secured is provided.

  Thereby, the connection part of the left and right leveling tool 66 and the support member 22 can be covered from the front by the bulging portion 58G of each mud removing cover 58, and each leveling tool of the mud that the left and right rear wheels 9 have jumped up. Adhesion to the connection location of 66 and the support member 22 can be prevented. Then, the mud removal covers 58 are removed from the support members 22 while the connecting portions between the left and right leveling tools 66 and the support members 22 are covered with the bulging portions 58G of the mud removal covers 58 in this way. The right and left leveling tools 66 can be attached to and detached from the support member 22. As a result, maintenance such as replacement of each leveling tool 66 can be easily performed.

  As shown in FIG. 15, the left and right mud covers 58 are provided with bulging cover portions 58B at both left and right ends of the plate-like cover portion 58A, and symmetrical left and right cutouts at the lower left and right ends of the plate-like cover portion 58A. The parts 58E and 58F are provided, and the left and right middle lower part of the plate-like cover part 58A is provided with a bulging part 58G. Thereby, compared with the case where the right and left mud removing covers 58 are configured as left and right asymmetric left and right dedicated parts, it is possible to improve the assembly of the mud removing cover 58 and reduce the cost.

  [Another embodiment]

[1] The riding rice transplanter may be one provided with a seedling planting device 4 for four-row planting or one provided with a seedling planting device 4 for ten-row planting. Moreover, what was equipped with suboperation apparatuses, such as a fertilizer application apparatus or a chemical spraying apparatus, may be used.

[2] The traveling vehicle body 1 includes, as left and right rear wheels 9, in addition to the left and right main wheels, an outer auxiliary wheel disposed adjacent to the vehicle body lateral side of each main wheel and an inner side disposed adjacent to the vehicle body lateral side of each main wheel. One or both of the auxiliary wheels may be provided.

[3] The seedling planting device 4 may include a crank type planting mechanism instead of the rotary type planting mechanism 20.

[4] The number and shape of the leveling float 16 provided in the seedling planting device 4 are variously changed according to the number of wheels provided as the left and right rear wheels 9 on the traveling vehicle body 1 and the number of planting lines of the seedling planting device 4. Is possible. For example, when each of the left and right rear wheels 9 is provided with three main wheels and inner and outer auxiliary wheels, a three-level grading thing that is formed wide as a leveling float 16 for leveling those wheel marks, etc. You may make it prepare.

[5] The mud removal cover 58 may be configured so as to straddle the link mechanism 3 and extend to the right and left support columns 23.

[6] The mud removing cover 58 for the six strips or the like may be configured as a left-right symmetric part having the right and left symmetrical shape similarly to the mud removing cover 58 for the eight strips. Further, the mud removing cover 58 for the eight strips may be configured as a left and right asymmetrical part similar to the six strip mud removing cover 58.

[7] Also in the mud removal cover 58 for the eight strips, the seedling planting device 4 is lowered to a lower limit position where the upper side of the seedling planting device 4 is closest to the rear wheel 9 at a position facing the rear wheel 9. Alternatively, a notch (rear wheel notch) 58D for avoiding contact with the rear wheel 9 may be provided in the lower limit lowered state.

[8] The shape of the notch 58D for the rear wheel formed in the mud removal cover 58 can be variously changed. For example, when the extension length of the mud removal cover 58 is long, the notch portion 58D for the rear wheel may be formed in a rectangular opening.

[9] The mud removing cover 58 may be configured such that the upper end 58C is inclined forward at the same inclination angle as the lower side.

[10] Planting depth which is one of the operation tools A extending from the seedling planting device 4 toward the traveling vehicle body 1 at the lower end portion of the mudguard cover 58 by forming the mudguard cover 58 wide. A cutout portion (first cutout portion) 58E that allows the adjustment lever 31 or the seedling removal amount adjustment lever 38 to be equipped may be provided.

[11] As shown in FIG. 19, the lower connecting member 26 welded to the lower portion of the support column 23 is received at the upper end portion of the mud repelled by the rear wheel 9 toward the leveling float 16 on the left and right ends. The float cover 65 is configured to include a connecting portion 26A that enables connection with the vertical bolts 64, and the second notch portion 58F for the support column formed at the lower end portion of the six-row mud removing cover 58 is used as a seedling. You may form so that it may have a magnitude | size which enables the connection with the vertical volt | bolt 64 of the float cover 65 with respect to the upper end part of the connection member 26 for the lower part from the front of the planting apparatus 4. FIG.

[12] Also in the seedling planting device 4 for 6-row planting and the like, similarly to the seedling planting device 4 for 8-row planting, the float cover 59 provided in the support member 22 is connected to the lower edge portion of the mud removal cover 58. An engaged portion 59 </ b> A that enables plug-in connection may be provided, and the float cover 59 may also be used as the engaged member 59.

[13] Also in the seedling planting device 4 for eight-row planting, the lower edge portion of the mud removal cover 58 can be connected to the support member 22 in the same manner as the seedling planting device 4 for six-row planting. You may comprise so that the to-be-engaged member 59 may be provided.

[14] The leveling tool 66 may be provided in the seedling planting device 4 so as to level the space between the center float 16 (16A) and the side float 16 (16B) adjacent to the left and right of the center float 16A. Good.

[15] The connecting member 27 that positions the locking member 52 that locks and holds the free end side of the marker 51 is engaged by the engaging portion 27B and the mounting portion 52B of the locking member 52 to engage the locking member 52. Is positioned in the vertical direction, and the locking member 52 is positioned in the front-rear direction by clamping the mounting portion 52B of the locking member 52 between the clamping portion 27C and the fastener 53. It may be configured.

[16] As shown in FIG. 20, the linkage rod 50 of the fixing mechanism portion 45 in the mechanical linkage mechanism 42 is formed in a lateral U shape in which both end portions 50A and 50B extend leftward from the intermediate portion 50C. The inclined portion 50D that is inclined outwardly between the one end portion 50A and the intermediate portion 50C may not be provided.

  The present invention can be applied to a riding rice transplanter in which a seedling planting device is connected to a rear portion of a traveling vehicle body so as to be swingable up and down.

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 2 Hydraulic cylinder 4 Seedling planting device 9 Rear wheel 16 Leveling float 16A Center float 16B Side float 16C Side float 17 Seedling stand 20 Planting mechanism 22 Support member (fixed part)
23 Post 23A Front edge 24 Cross member 27 Connecting member 27A Receiving portion 27B Engaging portion 27C Holding portion 30 Shaft 31 Planting depth adjusting lever 42 Mechanical linkage mechanism 43 Linking wire 43A Outer wire 43B Inner wire 44 Linking member 44A Long hole 45 fixing mechanism portion 46 fixing member 48 balance swing member 49 connecting shaft 50 linkage rod 50A one end portion 50B other end portion 51 marker 52 locking member 52A hook portion 52B attachment portion 52C end surface 53 fastener 58 mud cover 58A plate-like cover Part 58B bulge cover part 58C upper end part 58D notch part 58E first notch part 58F second notch part 58G bulge part 59 float cover (engaged member)
59A Engagement part 60 1st connection member 61 2nd connection member 62 Bolt with a knob 66 Leveling tool A Operation tool

Claims (15)

A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. With a notch,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
A marker that forms a running reference index on the mud surface of the field is arranged so that it can swing up and down on the left and right of the seedling planting device,
A locking member that locks and holds the free end side of the marker that has been switched to a standing posture is attached to a connecting member that connects the left and right struts and the cross member disposed at the laterally outer end of the seedling planting device,
The locking member has a hook portion for marker locking at one end portion, and is bent into a shape having a J-shaped attachment portion for the connecting member at the other end portion,
The connecting member receives the end surface of the locking member on the mounting portion side to position the locking member in the left-right direction, and the engagement member is engaged with the left and right sides of the locking member. A direction orthogonal to the left-right direction and the positioning direction of the engaging part by sandwiching the engaging part between the engaging part for positioning in a direction orthogonal to the direction and the fastening member attaching fastener. A riding rice transplanter provided with a clamping part for positioning the locking member at A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. With a notch,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. A riding rice transplanter connected to the support column and the cross member by two connecting members and a bolt with a knob screwed to the second connecting member. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a plurality of support columns that receive and support the upper side of the seedling mount from below, and a support member that is long to the left and right to support the lower end portion of the support column and the lower end portion of the mud removal cover,
The support member includes an engaged member that enables insertion connection of a lower edge of the mud cover,
A first cutout portion that allows a lower end portion of the mud removal cover to be equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, and a second that allows the support member to be coupled to the support member. A riding rice transplanter equipped with a notch. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Provided with a notch to avoid contact, and the upper end of the mudguard cover is inclined forward more greatly than the lower side,
The seedling planting device includes a left and right support member that supports the lower end of the mud removal cover,
The said support member is a riding rice transplanter provided with the to-be-engaged member which enables the insertion connection of the lower edge part in the said mud removal cover. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. A riding rice transplanter that includes a notch that avoids contact with the mud and has the upper end of the mudguard cover inclined forward more than the lower side. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The mud removing cover is located at a position facing the rear wheel, in the lower limit lowered state in which the seedling planting device is lowered to a lower limit position where the upper side of the seedling planting device is closest to the rear wheel. Passenger rice transplanter equipped with a notch to avoid contact. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
As the mud cover, it includes a left mud cover that faces the left half of the seedling table, and a right mud cover that faces the right half of the seed table,
The left and right mud removal covers are configured as left and right symmetrical parts,
A marker that forms a running reference index on the mud surface of the field is arranged so that it can swing up and down on the left and right of the seedling planting device,
A locking member that locks and holds the free end side of the marker that has been switched to a standing posture is attached to a connecting member that connects the left and right struts and the cross member disposed at the laterally outer end of the seedling planting device,
The locking member has a hook portion for marker locking at one end portion, and is bent into a shape having a J-shaped attachment portion for the connecting member at the other end portion,
The connecting member receives the end surface of the locking member on the mounting portion side to position the locking member in the left-right direction, and the engagement member is engaged with the left and right sides of the locking member. A direction orthogonal to the left-right direction and the positioning direction of the engaging part by sandwiching the engaging part between the engaging part for positioning in a direction orthogonal to the direction and the fastening member attaching fastener. A riding rice transplanter provided with a clamping part for positioning the locking member at A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. Two connecting members and a bolt with a knob screwed to the second connecting member are connected to the support column and the cross member,
As the mud cover, it includes a left mud cover that faces the left half of the seedling table, and a right mud cover that faces the right half of the seed table,
A riding rice transplanter in which the left and right mud removal covers are configured as left and right symmetrical parts. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and At the lower end thereof, equipped with an operation tool that extends from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support column to the support member,
The upper part of the mud cover is fixed to a first connecting member fixed to the upper part of the column, a bolt with a knob screwed to the first connecting member, and a cross member installed over the upper part of the plurality of columns. A riding rice transplanter connected to the support column and the cross member by two connecting members and a bolt with a knob screwed to the second connecting member. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mud cover includes a forward bulging portion that secures a space that allows connection from below the leveling tool to the front end of the support member between the lower end portion and the front end of the support member, and A riding rice transplanter having, at the lower end thereof, equipment of an operating tool extending from the seedling planting device toward the traveling vehicle body, or a notch that allows connection of the support to the support member. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
As the leveling float, comprising a center float to be deployed in the center of the left and right of the seedling planting device, and a side float to be deployed on the left and right of the center float,
The support member includes a float cover that catches mud that the rear wheel repels toward the leveling float, and a plurality of leveling tools that extend from the front end of the support member to level the float.
The float cover includes an engaged portion that enables insertion connection of a lower edge portion in the mud cover,
The mudguard cover is provided with a forward bulging portion that secures a space between the lower end portion and the front end of the support member to allow the front end of the support member to be connected from below the leveling implement. Rice transplanter. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device includes a leveling float for leveling a muddy surface of a farm field, a seedling stand in a front rising position extending toward the traveling vehicle body, and an arrangement deviated from right behind the rear wheel in the left-right direction. A plurality of support columns that receive and support the upper side of the seedling platform from below, and a support member that is long on the left and right to support the lower end of the support column,
The mud cover is located on the rear side of the front edge of the support column and is opposed to the back side of the seedling table, and swells to the front side from the plate cover unit so that the support column is on the front side. And a vertically long bulging cover portion covering from, and tilting the upper end portion of the mud removal cover to a greater extent than the lower side,
The support member includes a float cover that receives mud repelled by the rear wheel toward the leveling float;
The said float cover is a riding rice transplanter provided with the to-be-engaged part which enables the insertion connection of the lower edge part in the said mud removal cover. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device receives and supports the seedling mounting stand in a front-up posture extending toward the traveling vehicle body and the upper side of the seedling mounting base from the lower side in an arrangement deviated from right behind the rear wheel in the left-right direction. With a plurality of supporting columns,
The mud cover is positioned on the rear side of the front edge of the support column and faces the back side of the seedling table, and the support column bulges forward from the plate cover unit And a vertically long bulging cover portion that covers the front side, and the upper end portion of the mud removal cover is inclined forward more greatly than the lower side. A seedling planting device that is connected to the rear part of the traveling vehicle body so as to be able to swing up and down, and a vertical length extending from a lower part to an upper side of the seedling planting device, and the rear wheel of the traveling vehicle body faces the seedling planting device A mud removal cover attached to the seedling planting device so as to catch the mud
The seedling planting device receives and supports the seedling mounting stand in a front-up posture extending toward the traveling vehicle body and the upper side of the seedling mounting base from the lower side in an arrangement deviated from right behind the rear wheel in the left-right direction. With a plurality of supporting columns,
The mud cover is positioned on the rear side of the front edge of the support column and faces the back side of the seedling table, and the support column bulges forward from the plate cover unit Riding rice transplanter equipped with a vertical bulge cover that covers the front from the front side. A seedling planting device connected to the rear portion of the traveling vehicle body so as to be able to swing up and down; a hydraulic cylinder that drives the seedling planting device to move up and down; and a control valve that controls the flow of oil to the hydraulic cylinder,
The seedling planting device includes a leveling float that swings up and down around a support shaft facing left and right, a planting mechanism for planting a predetermined amount of seedlings in field mud after leveling by the leveling float, and the planting mechanism A planting depth adjusting lever that adjusts the planting depth of the seedling by the planting mechanism by changing the height position of the leveling float;
By linking the leveling float and the control valve so that the operation state of the control valve is switched in conjunction with the vertical swing of the leveling float and the seedling planting device is moved up and down, the planting mechanism It has a mechanical linkage mechanism that keeps the seedling planting depth constant,
The mechanical linkage mechanism includes a linkage wire, a longitudinal linkage member that links one end portion of the outer wire in the linkage wire and the free end portion of the leveling float, and one end portion of the inner wire in the linkage wire. A fixing mechanism that fixes the attachment device at a predetermined position;
The linkage member includes a longitudinally long hole,
The fixing mechanism portion includes a fixing member fixed to a fixing portion of the seedling planting device, a back and forth balance swinging member that swings up and down around a support shaft facing left and right with respect to the fixing member, A left and right connecting shaft that passes through the elongated hole of the linkage member and connects one end of the inner wire to the front end of the balance swinging member, and the planting depth adjustment of the rear end of the balance swinging member A linkage rod linked to the lever, the inner wire from one end of the outer wire regardless of the change in the reference height of the leveling float accompanying the planting depth adjustment of the seedling by the planting depth adjustment lever Configure the protrusion amount to be constant,
The linkage rod is formed in a shape in which both end portions extend toward the same left and right side, the assembly of one end portion to the rear end portion of the balance swinging member, and the planting of the other end portion A riding rice transplanter configured to be assembled to the depth adjusting lever from one side of the right and left sides of the seedling planting device.

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