JP2015223103A - Vegetation implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vegetation implement enabled to avoid wear reduction on a support base side and the strength degradation of a hinging shaft by performing the whirl stop of a hinging spindle of a support base at the hinging part of a link mechanism.SOLUTION: A support base is equipped with a hinging spindle 43 for supporting a link mechanism vertically swingably on a transverse axle, and the hinging spindle 43 have one end side insertable and extractable with respect to the support base, and is equipped with a whirl stop mechanism 44 on the end part opposed to the end part of the withdrawal side. The while stop mechanism 44 is equipped with a retaining projection piece 45 fixed on the hinging spindle 43, and the retaining projection piece 45 is connected to and fixed on the support base.

Description

  The present invention relates to a traveling machine body that can be moved and moved on a field, a planting system working device for planting seedlings or sowing seeds on the ground, and connecting the working device to the rear side of the traveling machine body to move up and down. The present invention relates to a planting work machine including a link mechanism to be operated. The planting system working device in the present invention refers to a device for planting plant seedlings or sowing seed seeds, such as a seedling planting device or a seeding device. A working machine is a working machine provided with the planting system working device.

Examples of the planting work machine that includes the link mechanism as described above and supports the planting work apparatus include the structures described in [1] to [7] below.
[1] The front end portion of the link mechanism is pivotally supported by a support stand standing at the rear part of the traveling machine body, and the link mechanism is connected to a shaft pivotally supported relative to the support base. A structure with a front end attached (see Patent Document 1).
[2] The front end portion of the link mechanism is pivotally supported by a support stand that is erected at the rear part of the traveling machine body, and the link mechanism is connected to the connection bolt that is fixed so as not to rotate relative to the support stand. A structure to which the front end of the link is attached (see Patent Document 2).

[3] The front end portion of the link mechanism is pivotally supported at the rear part of the traveling machine body, and the link mechanism has a machine body frame and a support base with respect to a support stand erected at the rear part of the machine body frame. The lower link of the link mechanism is supported in a state where it enters the left and right widths of the channel-shaped reinforcing plate provided at the connecting portion. And the front-end part of the lower link is a thing of the structure pivotally supported so that relative rotation was possible with respect to the connection bolt of the state fixed to the support stand so that relative rotation was impossible (refer patent document 3).

[4] The link mechanism connected to the rear part of the traveling machine body is configured so that the right and left of the pair of right and left straight link members can be suppressed so that yawing of a planting work apparatus such as a seedling planting apparatus with respect to the traveling machine body can be suppressed. The direction interval is configured so that the traveling machine body side is wide in plan view and the planting work device side is narrow (see Patent Document 4).

[5] When the planting work machine is connected to the rear part of the traveling machine body via a link mechanism so as to be movable up and down, the rolling operation of the planting work machine is performed when the planting work machine is raised to a predetermined height. In order to suppress this, a stopper mechanism made up of cushion rubber that contacts the lower surface side of the lower link of the link mechanism is provided (see Patent Document 5).

[6] A planting work machine is connected to the rear part of the traveling machine body via a link mechanism so as to be movable up and down, and a power take-out shaft for inputting power from the traveling machine body to the planting system work machine is provided on the transmission case. Derived from the rear and configured to be supported by a bearing at the rear end of the transmission case (see Patent Document 6).

[7] A seedling planting device as a planting system working machine is connected to the rear part of the traveling machine body via a link mechanism, and the seedling planting device is configured to be capable of rolling rocking around a longitudinal axis. In addition, the seedling planting apparatus is configured to swing back to a predetermined rolling angle range with respect to the link mechanism using an electric motor (see Patent Document 7).

Japanese Patent No. 4052912 (see paragraph numbers “0029” and “0031”, FIG. 4 and FIG. 6) Japanese Patent No. 4052912 (see paragraph numbers “0032” and “0033”, FIGS. 4 and 6 to 8) Japanese Patent No. 4052912 (paragraph numbers “0032”, “0033”, “0034”, see FIGS. 4 to 8) Japanese Patent Laid-Open No. 08-289832 (see FIGS. 3 and 5) JP 09-322616 (paragraph numbers “0031” and “0032”, see FIGS. 11 to 14) Japanese Patent Laying-Open No. 2005-160407 (see paragraph number “0037”, FIG. 12 and FIG. 13) Japanese Unexamined Patent Publication No. 2003-169512 (see paragraph numbers “0056” and “0057”, FIG. 13 and FIG. 14)

In the planting work machine described in the above-mentioned Patent Document 1, the front end portion of the top link is supported in a state of being externally fitted to a shaft pivotally supported so as to be relatively rotatable with respect to a support base fixed to the traveling machine body side. Has been. Therefore, as the top link swings up and down, the support part on the side of the support that pivotally supports the shaft wears out, and there is a risk that the durability of the link mechanism will be reduced, such as rattling at the pivotal support part of the link mechanism. There is room for improvement.
In the planting work machine described in Patent Document 2, the connection bolt in a state in which the front end portion of the lower link is fixed to the support base so as not to rotate relative to the support base among the link mechanisms connected to the support base. Is attached. If such a structure is adopted, it is effective in solving the problem that the wear on the support base side proceeds due to the structure in which the shaft rotates as shown in Patent Document 1, but the connection bolt is used for preventing rotation. There may be a new problem in terms of supporting strength or manufacturing and processing, such as providing a notch or processing the connecting hole on the support base into a special shape.

In the planting work machine described in the above-mentioned Patent Document 3, among the link mechanisms connected to the support base, the connection bolt in a state where the front end portion of the lower link is fixed to the support base in a relatively non-rotatable manner. The connecting bolt can be inserted and removed from the laterally outward side in the left-right direction. As a result, it is relatively easy to insert and remove the connecting bolt, but the front end of the lower link enters the width of the channel-shaped reinforcing plate provided at the connection point between the machine frame and the support base. Is provided.
This is due to the fact that the rotation prevention structure of the connection bolt is formed in the support portion between the connection bolt and the support base. For this reason, the support base in which the space for allowing the front end portion of the lower link to enter is formed. There is room for improvement in that the strength of the device itself is reduced, and that the work for moving the front end portion of the lower link into and out of the predetermined connecting position requires a lot of work.

In the planting work machine described in the above-mentioned Patent Document 4, as a link mechanism connected to the rear part of the traveling machine body, the yawing of the planting work apparatus such as a seedling planting apparatus with respect to the traveling machine body can be suppressed. A pair of right and left straight link members having a structure in which the traveling body side is wide in a plan view and the planting work device side is narrow in width is used in a plan view.
Although it is useful in that the yawing of the planting work device can be suppressed by doing in this way, the left and right link members are connected to the vertical swing axis of the link mechanism and the planting work device. Therefore, the connecting structure tends to be complicated because the posture is inclined obliquely with respect to the horizontal axis of the connecting shaft in the left-right direction.
Therefore, for example, as shown in FIG. 16, a channel-shaped connecting member is connected to the front end portion and the rear end portion of the left and right link members, and the longitudinal direction of the channel-shaped connecting member is set to the longitudinal direction of the left and right link members. Although it is possible to incline and configure it so as to be orthogonal to the vertical axis of the link mechanism and the horizontal axis of the connecting shaft in the left-right direction at the connection point with the planting work device, In this case, there is a possibility that a new problem such as requiring a large amount of work for connecting the channel-shaped connecting member or obtaining a sufficient strength may occur, and there is room for improvement in this respect.

   In the planting work machine described in Patent Document 5, when the planting work machine is raised to a predetermined height, the lower link of the link mechanism is controlled so as to suppress the rolling operation of the planting work machine. A cushion rubber that abuts on the lower surface side is provided. However, in this structure, since the rolling operation of the link mechanism is suppressed only by the contact of the cushion rubber with the lower surface of the lower link, a certain degree of rolling operation of the planting work machine occurs within the elastic range of the rubber. In addition, there is a possibility that the action of suppressing the rolling operation on the planting work machine may be further reduced due to wear of the cushion rubber or the like.

   The planting work machine described in Patent Document 6 has a structure in which a power take-out shaft for inputting power from the traveling machine body side to the planting work machine is derived from the rear part of the transmission case. is there. For this reason, when trying to position the power take-off shaft as close to the rear end of the traveling aircraft as possible, the transmission case should also be arranged close to the rear end of the aircraft, or the transmission case should be long and long in the front-rear direction. Must be configured. However, it is not feasible to greatly change the position of the mission case, which is the backbone of the traveling aircraft, and it is not practical to enlarge the mission case more than necessary, and there is room for improvement in this respect. .

   In the planting work machine described in Patent Document 7, the electric motor for causing the seedling planting device connected to the rear part of the traveling machine body via the link mechanism to roll around the axis in the front-rear direction. The rolling operation control of the seedling planting device is easily performed accurately by the operation of the electric motor. However, when controlling the rotation of the drive pulley around which the rolling operation cable is wound via the pinion provided on the output shaft on the electric motor side and the transmission gear meshing with the pinion, the thickness of the transmission gear is changed. In such a case, the meshing position with the pinion on the output shaft side may shift in the axial direction of the output shaft, and wear may occur with the meshing part partially deviated in the axial direction of the transmission gear or pinion. There is room for improvement in that there is.

The present invention reduces wear on the support base by preventing the support shaft from rotating by preventing the support shaft from rotating relative to the support base at the pivotal support portion of the link mechanism. It is something to try.
In addition, the present invention is intended to easily perform the connecting operation of the link member to the support base and to avoid a decrease in strength on the support base side.
In addition, the present invention can simplify production processing and avoid strength reduction when configuring a link member having a shape suitable for suppressing yawing of the link mechanism.
Moreover, this invention can aim at the durable improvement of the apparatus for suppressing the rolling operation | movement of a planting type work apparatus in the limit position of the raising / lowering operation | movement range of a link mechanism.
In addition, the present invention provides a structure for supporting a power take-off shaft extending from the transmission case to the rear of the fuselage at a position different from the transmission case.
Further, in the present invention, as an electric motor for controlling the rolling operation of the planting work device, a favorable operation is performed so that it can be appropriately adjusted even when a commercially available electric motor is used as a component. Is something to try to do.

[Solution 1]
The technical means of the working machine in the present invention taken to solve the above-mentioned problems are a traveling machine body that can move and travel, a working device that performs seedling planting or sowing work on the ground, and a rear side of the traveling machine body A link mechanism for connecting the work device to move up and down, and the traveling machine body includes a driver seat near the center in the left-right direction, and connects the link mechanism in the vicinity of the rear side of the driver seat. An operation lever for holding and operating the driver seated on the driver seat at a lateral side portion in the left-right direction of the driver seat. The support base is provided with a pivot shaft that supports the link mechanism so as to swing up and down around a horizontal axis along the left-right direction, and the pivot shaft can be inserted and removed at one end side with respect to the support base. Constructed and opposite to the end of the insertable / removable side An anti-rotation mechanism is provided at an end, and the anti-rotation mechanism is fixed to be fixed so as to be positioned on the opposite side to the side where the operation lever is disposed in the left-right direction with respect to the pivot shaft. A locking piece that is in contact with the lateral side surface of the support base and that intersects the lateral side surface with a first contact surface that becomes the limit of movement of the pivot shaft toward the insertion side. And a second contact surface that abuts against a front surface or a rear surface of the support base to prevent rotation of the locking protrusion, and the locking protrusion is in contact with the support base. It is connected and fixed by fixing bolts.

[Operation and effect of invention according to Solution 1]
According to the configuration of the invention relating to the above solution 1, since the pivot shaft of the link mechanism is fixed to the support base in a non-rotating state, a phenomenon occurs in which the pivot shaft rotates and the support base is worn out. Since this can be avoided, there is an advantage that the durability of the support base on the traveling machine body side can be improved.
In order to prevent the rotation of the pivot shaft in this way, a notch structure is formed on the pivot shaft instead of a notch structure in which a notch is formed in the pivot shaft and engaged with a deformed hole in the support portion on the support base side. Since the locking protrusion is fixed and the rotation is stopped, it is also useful in that the strength reduction of the support shaft can be suppressed.
The locking protrusion has a first contact surface that is in contact with the lateral side surface of the support base and becomes a limit of movement of the pivot shaft toward the insertion side, and a forward facing surface of the support base in a direction intersecting the lateral side surface. And a second contact surface that contacts the rearward surface and prevents rotation of the locking protrusion, so that positioning of the pivot shaft in the axial direction by the locking protrusion, rotation prevention, Both of these actions can be combined, and there is an advantage that the structure can be simplified.
In addition, since the locking protrusion is connected and fixed to the support base by the fixing bolt, the locking protrusion is firmly fixed to the support base without rattling, and a reliable detent action is exhibited. Can do.
Furthermore, the locking protrusion and the fixing bolt of the anti-rotation mechanism are provided so as to be located on the side opposite to the side on which the operation lever for holding and operating by the driver sitting on the driver's seat is provided. Therefore, the anti-rotation mechanism that needs to be operated by getting off the traveling aircraft is positioned on the side where the driver gets on and off the traveling aircraft more frequently, and the control lever is on the opposite side that does not get in the way when getting on and off If it is located in the position, there is an advantage that the operation of the detent mechanism and the operation lever can be easily performed.

[Solution 2]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and the traveling machine body is provided with a support base for connecting the link mechanism, and the support base includes a left and right link mechanism. A pivot shaft that is supported so as to be swingable up and down around a horizontal axis that extends in the direction. The pivot shaft is configured such that one end side can be inserted into and removed from the support base, and an end on the side that can be inserted and removed An anti-rotation mechanism at an end opposite to the portion, and the anti-rotation mechanism includes an engaging protrusion fixed to the pivot shaft, and the engaging protrusion is located on a side of the support base. A first contact surface that is in contact with a side surface and serves as a movement limit to the insertion side of the pivot shaft; And a second contact surface that abuts against the front-facing surface or the rear-facing surface of the support base in a direction intersecting the side surface and prevents rotation of the locking protrusion, and the locking protrusion is That is, it is connected and fixed to the support base by a fixing bolt.

[Operation and effect of invention according to Solution 2]
According to the configuration of the invention relating to the above solution 2, since the pivot shaft of the link mechanism is fixed to the support base in a non-rotating state, a phenomenon occurs in which the pivot shaft rotates and the support base is worn out. Since this can be avoided, there is an advantage that the durability of the support base on the traveling machine body side can be improved.
In order to prevent the rotation of the pivot shaft in this way, a notch structure is formed on the pivot shaft instead of a notch structure in which a notch is formed in the pivot shaft and engaged with a deformed hole in the support portion on the support base side. Since the locking protrusion is fixed and the rotation is stopped, it is also useful in that the strength reduction of the support shaft can be suppressed.
The locking protrusion has a first contact surface that is in contact with the lateral side surface of the support base and becomes a limit of movement of the pivot shaft toward the insertion side, and a forward facing surface of the support base in a direction intersecting the lateral side surface. And a second contact surface that contacts the rearward surface and prevents rotation of the locking protrusion, so that positioning of the pivot shaft in the axial direction by the locking protrusion, rotation prevention, Both of these actions can be combined, and there is an advantage that the structure can be simplified.
In addition, since the locking protrusion is connected and fixed to the support base by the fixing bolt, the locking protrusion is firmly fixed to the support base without rattling, and a reliable detent action is exhibited. Can do.

[Solution 3]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and the traveling machine body is provided with a support base for connecting the link mechanism, and the support base includes a left and right link mechanism. A pivot shaft that is supported so as to be swingable up and down around a horizontal axis that extends in the direction. The pivot shaft is configured such that one end side can be inserted into and removed from the support base, and an end on the side that can be inserted and removed An anti-rotation mechanism at an end opposite to the portion, and the anti-rotation mechanism includes an engaging protrusion fixed to the pivot shaft, and the engaging protrusion is located on a side of the support base. A first contact surface that is in contact with a side surface and serves as a movement limit to the insertion side of the pivot shaft; And a second contact surface that abuts against the front-facing surface or the rear-facing surface of the support base in a direction intersecting the side surface and prevents rotation of the locking projection piece, the locking projection piece, It is connected and fixed to the support base.

[Operation and effect of invention according to Solution 3]
According to the configuration of the invention relating to the above solution 3, since the pivot shaft of the link mechanism is fixed to the support base in a non-rotating state, a phenomenon occurs in which the pivot shaft rotates and the support base is worn out. Since this can be avoided, there is an advantage that the durability of the support base on the traveling machine body side can be improved.
In order to prevent the rotation of the pivot shaft in this way, a notch structure is formed on the pivot shaft instead of a notch structure in which a notch is formed in the pivot shaft and engaged with a deformed hole in the support portion on the support base side. Since the locking protrusion is fixed and the rotation is stopped, it is also useful in that the strength reduction of the support shaft can be suppressed.
The locking protrusion has a first contact surface that is in contact with the lateral side surface of the support base and becomes a limit of movement of the pivot shaft toward the insertion side, and a forward facing surface of the support base in a direction intersecting the lateral side surface. And a second contact surface that contacts the rearward surface and prevents rotation of the locking protrusion, so that positioning of the pivot shaft in the axial direction by the locking protrusion, rotation prevention, Both of these actions can be combined, and there is an advantage that the structure can be simplified.

[Solution 4]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and the traveling machine body is provided with a support base for connecting the link mechanism, and the support base includes a left and right link mechanism. A pivot shaft that is supported so as to be swingable up and down around a horizontal axis that extends in the direction. The pivot shaft is configured such that one end side can be inserted into and removed from the support base, and an end on the side that can be inserted and removed An anti-rotation mechanism at an end opposite to the portion, and the anti-rotation mechanism includes a locking protrusion fixed to the pivot shaft, and the locking protrusion is connected and fixed to the support base. It is that it is configured to be.

[Operations and effects of invention according to Solution 4]
According to the configuration of the invention relating to the above solution 4, since the pivot shaft of the link mechanism is fixed to the support base in a non-rotating state, a phenomenon occurs in which the pivot shaft rotates and the support base is worn out. Since this can be avoided, there is an advantage that the durability of the support base on the traveling machine body side can be improved.
In order to prevent the rotation of the pivot shaft in this way, a notch structure is formed on the pivot shaft instead of a notch structure in which a notch is formed in the pivot shaft and engaged with a deformed hole in the support portion on the support base side. Since the locking protrusion is fixed and the rotation is stopped, it is also useful in that the strength reduction of the support shaft can be suppressed.

[Solution 5]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body, and a side of a connection portion to the machine body frame. Each of the left and right link members attached to the outside is connected to the airframe frame with respect to a pair of left and right lateral pivots whose front end portion has a horizontal axis on a straight line along the left and right direction. The left and right horizontal pivot shafts are pivoted separately on the left and right sides, and are arranged at predetermined intervals between the respective end portions on the inward side of the body, and the inner end in the left-right direction. The airframe is provided with a detent mechanism Mounted in a non-rotating state with respect to the frame and configured to be able to be pulled out to the laterally outward side in the left-right direction, and power is transmitted from the power source installed in the traveling machine body to the outside within the width of the predetermined interval. This means that a power take-out shaft for taking out is provided.

[Operation and effect of invention according to Solution 5]
According to the configuration of the invention relating to the solution means 5 described above, the pivotal support shaft is composed of a pair of left and right, and each is configured to be able to be pulled out to the laterally outer side. There are advantages.
In addition, since the detent mechanism is provided at the end of the lateral support shaft on the inward side of the body, the end of the lateral support shaft on the outer side of the body is positioned closer to the lateral outward end of the entire body. be able to. As a result, the front end side of the link member supported by the lateral pivot shaft is positioned as close to the laterally outer side as possible, so that the front side is wide with respect to the center line in the longitudinal direction of the aircraft, and the rear side is in a tilted posture. It becomes easy to arrange. As a result, there is an advantage that the link mechanism can be easily configured to have a structure having a large resistance against yawing.
And there is an advantage that the space between the left and right lateral support shafts can be used as a space for disposing the power take-out shaft for taking out the power from the power source installed in the traveling machine body to the outside.

[Solution 6]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body, and a side of a connection portion to the machine body frame. Each of the left and right link members attached to the outside is connected to the airframe frame with respect to a pair of left and right lateral pivots whose front end portion has a horizontal axis on a straight line along the left and right direction. The left and right horizontal pivot shafts are pivoted separately on the left and right sides, and are arranged at predetermined intervals between the respective end portions on the inward side of the body, and the inner end in the left-right direction. The airframe is provided with a detent mechanism Mounted in a detent state with respect to frame, and is that which is configured to be capable of extracting the lateral outer side in the lateral direction.

[Operations and Effects of Invention According to Solution 6]
According to the configuration of the invention relating to the above solution 6, since the horizontal pivot is composed of a pair of left and right, and each is configured so as to be able to be pulled out laterally outside, it is easy to operate from the lateral lateral side of the aircraft, Further, there is an advantage that the space between the left and right lateral pivot shafts can be used as a space for disposing other devices.
In addition, since the detent mechanism is provided at the end of the lateral support shaft on the inward side of the body, the end of the lateral support shaft on the outer side of the body is positioned closer to the lateral outward end of the entire body. be able to. As a result, the front end side of the link member supported by the lateral pivot shaft is positioned as close to the laterally outer side as possible, so that the front side is wide with respect to the center line in the longitudinal direction of the aircraft, and the rear side is in a tilted posture. It becomes easy to arrange. As a result, there is an advantage that the link mechanism can be easily configured to have a structure having a large resistance against yawing.

[Solution 7]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body, and a side of a connection portion to the machine body frame. Each of the left and right link members attached to the outside is connected to the airframe frame with respect to a pair of left and right lateral pivots whose front end portion has a horizontal axis on a straight line along the left and right direction. The left and right lateral pivot shafts are pivotally supported separately on the left and right sides, and are arranged at predetermined intervals between the respective end portions on the inward side of the airframe, and in a non-rotating state with respect to the airframe frame. Installed and left and right Is that is configured to be capable of extracting the lateral outer side of the countercurrent.

[Operation and effect of invention according to Solution 7]
According to the configuration of the invention relating to the solution means 7 described above, the lateral pivot shaft is composed of a pair of left and right, and each is configured to be able to be pulled out laterally outside, so that it is easy to operate from the lateral side of the body, In addition, there is an advantage that the space between the left and right lateral pivot shafts can be used as a space for disposing other devices.

[Solution 8]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a pair of left and right link members for connecting the work device to the traveling machine body, and the left and right link members are arranged in the front-rear direction. The intermediate portion is formed of a single rectangular tube-shaped pipe member that is bent in the left-right direction.

[Operation and effect of invention according to Solution 8]
According to the configuration of the invention relating to the above solution 8, since the link member is formed by bending a single rectangular tube-shaped pipe member, the number of parts is small, the structure is simple, and the number of manufacturing processes is reduced. There is an advantage of being.

[Solution 9]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device between the link device and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism can be elastically deformed by contact with the link member. After the elastic material made of rubber or synthetic resin material contacts the link member after the elastic material contacts the link member, the amount of compressive deformation of the elastic material is controlled within a predetermined range. A contact member, and the contact member is formed in a ring shape so as to surround an outer periphery of the elastic member, and the stopper mechanism is located at an upper limit position of a lifting operation range of the link mechanism. An upper limit side stopper mechanism that limits the rolling operation of the upper limit side stopper mechanism, and a lower limit side stopper mechanism that limits the rolling operation of the working device at the lower limit position. Each of the elastic members provided in the mechanism includes a contact surface with respect to the lower edge of the link member, and each contact surface of the link member in a range corresponding to a portion in contact with the contact surface. The elastic material provided to the upper limit side stopper mechanism is configured to be a surface perpendicular to the up-and-down movement locus of the lower edge portion, The elastic member provided in the lower limit side stopper mechanism is provided at a position closer to the connection portion of the link member with respect to the traveling machine body than the connection point between the link member and the work device, and the link member and the work device It is that it is provided in the position far from the connection location of the said link member with respect to the said traveling body rather than the connection point.

[Operations and effects of invention according to Solution 9]
According to the configuration of the invention relating to the solving means 9 described above, the elastic member is provided with an elastic material that can be elastically deformed in the compression direction by contact with the link member, and is in contact with the link member after contact with the elastic member, thereby compressing the elastic material. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.
Since the elastic material is made of a volume elastically deformable rubber or synthetic resin material, the means for impact interference can be simply configured, and from the volume elastically deformable rubber or synthetic resin material. A situation in which the elastic member to be excessively crushed by contact with the link member can also be suppressed by the contact member, which is useful for improving durability.
Furthermore, since the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material, the ring-shaped contact member is less displaced from the center position when the elastic body that changes in volume is expanded in the horizontal direction. It will guide while suppressing. As a result, even if the elastic material is thick, it can be deformed while accurately maintaining the elastic force in the desired compressive deformation direction while suppressing the digging deformation and the like. There is an advantage that it is easy to maintain the performance of the system over a long period of time.
Moreover, since the stopper mechanism exists on both the upper limit side and the lower limit side, the rolling operation of the work device can be performed in either the state where the work device is raised to the upper limit or the work device is lowered to the lower limit. There are advantages that can be limited.
In addition, each contact surface is configured to be a surface perpendicular to the up-and-down movement locus of the lower edge portion of the link member in a range corresponding to the portion in contact with the contact surface. Since the contact with the edge portion is easy to be performed on the entire contact surface and it can be used in a state where uneven wear hardly occurs, there is also an advantage that durability can be improved in this respect.

[Solution 10]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device between the link device and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism can be elastically deformed by contact with the link member. After the elastic material made of rubber or synthetic resin material contacts the link member after the elastic material contacts the link member, the amount of compressive deformation of the elastic material is controlled within a predetermined range. A contact member, and the contact member is formed in a ring shape so as to surround an outer periphery of the elastic member, and the stopper mechanism is located at an upper limit position of a lifting operation range of the link mechanism. An upper limit side stopper mechanism for limiting the rolling operation of the upper limit side stopper mechanism and a lower limit side stopper mechanism for limiting the rolling operation of the working device at the lower limit position, the elastic material provided in the upper limit side stopper mechanism, and a lower limit side stopper Each of the elastic members provided in the mechanism includes a contact surface with respect to the lower edge of the link member, and each contact surface of the link member in a range corresponding to a portion in contact with the contact surface. That is, it is configured to be a surface perpendicular to the up-and-down movement locus of the lower edge portion.

[Operations and Effects of Invention According to Solution 10]
According to the configuration of the invention relating to the solving means 10 described above, the elastic material is provided with an elastic material that can be elastically deformed in the compression direction by contact with the link member, and is in contact with the link member after contact with the elastic material, thereby compressing the elastic material. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.
Since the elastic material is made of a volume elastically deformable rubber or synthetic resin material, the means for impact interference can be simply configured, and from the volume elastically deformable rubber or synthetic resin material. A situation in which the elastic member to be excessively crushed by contact with the link member can also be suppressed by the contact member, which is useful for improving durability.
Furthermore, since the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material, the ring-shaped contact member is less displaced from the center position when the elastic body that changes in volume is expanded in the horizontal direction. It will guide while suppressing. As a result, even if the elastic material is thick, it can be deformed while accurately maintaining the elastic force in the desired compressive deformation direction while suppressing the digging deformation and the like. There is an advantage that it is easy to maintain the performance of the system over a long period of time.
Moreover, since the stopper mechanism exists on both the upper limit side and the lower limit side, the rolling operation of the work device can be performed in either the state where the work device is raised to the upper limit or the work device is lowered to the lower limit. There are advantages that can be limited.
In addition, each contact surface is configured to be a surface perpendicular to the up-and-down movement locus of the lower edge portion of the link member in a range corresponding to the portion in contact with the contact surface. Since the contact with the edge portion is easy to be performed on the entire contact surface and it can be used in a state where uneven wear hardly occurs, there is also an advantage that durability can be improved in this respect.

[Solution 11]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device between the link device and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism can be elastically deformed by contact with the link member. After the elastic material made of rubber or synthetic resin material contacts the link member after the elastic material contacts the link member, the amount of compressive deformation of the elastic material is controlled within a predetermined range. A contact member, and the contact member is formed in a ring shape so as to surround an outer periphery of the elastic member, and the stopper mechanism is located at an upper limit position of a lifting operation range of the link mechanism. This means that both an upper limit side stopper mechanism for limiting the rolling operation and a lower limit side stopper mechanism for limiting the rolling operation of the working device at the lower limit position are provided.

[Operations and Effects of Invention According to Solution 11]
According to the configuration of the invention relating to the solving means 11 described above, an elastic material that is elastically deformable in the compression direction by contact with the link member is provided, and the elastic material is compressed by contacting the link member after contact with the elastic material. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.
Since the elastic material is made of a volume elastically deformable rubber or synthetic resin material, the means for impact interference can be simply configured, and from the volume elastically deformable rubber or synthetic resin material. A situation in which the elastic member to be excessively crushed by contact with the link member can also be suppressed by the contact member, which is useful for improving durability.
Furthermore, since the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material, the ring-shaped contact member is less displaced from the center position when the elastic body that changes in volume is expanded in the horizontal direction. It will guide while suppressing. As a result, even if the elastic material is thick, it can be deformed while accurately maintaining the elastic force in the desired compressive deformation direction while suppressing the digging deformation and the like. There is an advantage that it is easy to maintain the performance of the system over a long period of time.
Moreover, since the stopper mechanism exists on both the upper limit side and the lower limit side, the rolling operation of the work device can be performed in either the state where the work device is raised to the upper limit or the work device is lowered to the lower limit. There are advantages that can be limited.

[Solution 12]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device between the link device and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism can be elastically deformed by contact with the link member. After the elastic material made of rubber or synthetic resin material contacts the link member after the elastic material contacts the link member, the amount of compressive deformation of the elastic material is controlled within a predetermined range. And a contact member, the contact member is that formed in a ring shape so as to surround the outer periphery of the elastic member.

[Operations and Effects of Invention According to Solution 12]
According to the configuration of the invention relating to the solving means 12, the elastic member is provided with an elastic material that can be elastically deformed in the compression direction by contact with the link member, and is in contact with the link member after the elastic material is contacted. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.
Since the elastic material is made of a volume elastically deformable rubber or synthetic resin material, the means for impact interference can be simply configured, and from the volume elastically deformable rubber or synthetic resin material. A situation in which the elastic member to be excessively crushed by contact with the link member can also be suppressed by the contact member, which is useful for improving durability.
Furthermore, since the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material, the ring-shaped contact member is less displaced from the center position when the elastic body that changes in volume is expanded in the horizontal direction. It will guide while suppressing. As a result, even if the elastic material is thick, it can be deformed while accurately maintaining the elastic force in the desired compressive deformation direction while suppressing the digging deformation and the like. There is an advantage that it is easy to maintain the performance of the system over a long period of time.

[Solution 13]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device between the link device and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism can be elastically deformed by contact with the link member. After the elastic material made of rubber or synthetic resin material contacts the link member after the elastic material contacts the link member, the amount of compressive deformation of the elastic material is controlled within a predetermined range. Is that with a per member.

[Operations and Effects of Invention According to Solution 13]
According to the configuration of the invention relating to the solving means 13 described above, the elastic member is provided with an elastic material that can be elastically deformed in the compression direction by contact with the link member. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.
Since the elastic material is made of a volume elastically deformable rubber or synthetic resin material, the means for impact interference can be simply configured, and from the volume elastically deformable rubber or synthetic resin material. A situation in which the elastic member to be excessively crushed by contact with the link member can also be suppressed by the contact member, which is useful for improving durability.

[Solution 14]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the work device to move up and down, and the link mechanism includes a link member for connecting the work device to the traveling machine body, and the link member and the work device, A stopper mechanism that restricts the rolling operation of the working device by contact with the link member at a predetermined lifting operation position of the link mechanism is provided, and the stopper mechanism is elastically deformed in the compression direction by contact with the link member. An elastic material that is possible, and a contact member that contacts the link member after the elastic material contacts the link member and limits the amount of compressive deformation of the elastic material to a predetermined range. Is Umono.

[Operations and Effects of Invention According to Solution 14]
According to the configuration of the invention relating to the solving means 14 described above, the elastic material is provided with an elastic material that can be elastically deformed in the compression direction by contact with the link member, and is in contact with the link member after contact with the elastic material, thereby compressing the elastic material. Since it has a contact member that limits the amount of deformation to a predetermined range, it can reduce the impact caused by contact with the link member and can set the operation limit position of the link member with high accuracy by contact with the contact member. There is.

[Solution 15]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and the traveling body is integrated with a front and rear frame along the front and rear direction on both the left and right sides, and a horizontal frame that connects the left and right front and rear frames. A vehicle body frame, and a power take-out shaft for outputting the driving force on the side of the travel aircraft body to the outside at an end on the rear side of the travel aircraft body, and the power take-out shaft is a vertical direction of the machine body frame in a side view A power transmission shaft for transmitting a driving force to the working device is connected to the power take-off shaft via a universal joint, and the power take-off shaft is connected to the running shaft. A bearing portion for supporting at the rear end of the airframe is attached to the lateral frame at a position close to the universal joint in the front-rear direction, and the bearing portion is a boss portion that is externally fitted to the power take-off shaft; A flange portion facing the fuselage frame, and a reinforcing rib extending between the boss portion and the flange portion, the flange portion extending in the left-right direction toward the left and right lateral sides of the boss portion, That is, the reinforcing rib extends from both the upper side and the lower side of the boss portion toward the left and right lateral sides.

[Operations and Effects of Invention According to Solution 15]
According to the invention relating to the solving means 15, the bearing portion for supporting the power take-off shaft is connected and fixed to the body frame at the rear end of the traveling aircraft body. You can make use of itself. Therefore, in order to provide the bearing portion of the power take-off shaft on the rear side of the fuselage, the aircraft frame itself can be used without changing the position of the mission case or making a major design change such as increasing the size of the mission case itself. There is an advantage that it becomes easy to dispose the bearing portion of the power take-off shaft as close as possible to the rear end side of the machine body.
And since the bearing part is provided with the reinforcing rib which extends over the boss part fitted to the power take-off shaft and the flange part facing the machine body frame, the bearing part itself having the required strength can be configured with a lightweight structure. There are advantages.
In addition, the flange portion of the bearing portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Thus, the entire bearing portion can be structured to be narrow in the vertical direction, and there is an advantage that it can be attached to a machine frame having a narrow vertical width without any trouble.
Furthermore, since the horizontal frame that connects the left and right front and rear frames, which are strength members, can be the mounting target of the bearing section, the bearing section is placed at a rigid location and at any position in the left-right direction. In addition, since the bearing portion attached to the lateral frame supports the power take-off shaft at a position close to the universal joint, there is an advantage that the power take-out shaft can be stably supported at a position near the rear end of the fuselage. is there.
Furthermore, since the power take-off shaft is disposed within the vertical width of the airframe when viewed from the side, the airframe is used as a protective member for the power take-off shaft, and the power take-off shaft can easily avoid interference with other objects. This is advantageous.

[Solution 16]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and the traveling body is integrated with a front and rear frame along the front and rear direction on both the left and right sides, and a horizontal frame that connects the left and right front and rear frames. A body frame, and a power take-out shaft for outputting the driving force on the traveling machine body side to the outside at an end portion on the rear side of the traveling machine body. The power take-off shaft provides a driving force to the working device. A transmission shaft for transmission is connected via a universal joint, and a bearing portion for supporting the power take-off shaft at an end on the rear side of the traveling machine body is provided in the front-rear direction. The bearing portion is attached to the lateral frame at a close position, and the bearing portion includes a boss portion externally fitted to the power take-off shaft, and a flange portion facing the body frame, and is reinforced across the boss portion and the flange portion. The flange portion extends in the left-right direction toward the left and right lateral sides of the boss portion, and the reinforcing rib extends from both the upper side and the lower side of the boss portion to the lateral left and right sides. It is that it is extended towards.

[Operations and Effects of Invention According to Solution 16]
According to the invention relating to the solving means 16, the bearing portion for supporting the power take-off shaft is connected and fixed to the body frame at the rear end portion of the traveling aircraft body. You can make use of itself. Therefore, in order to provide the bearing portion of the power take-off shaft on the rear side of the fuselage, the aircraft frame itself can be used without changing the position of the mission case or making a major design change such as increasing the size of the mission case itself. There is an advantage that it becomes easy to dispose the bearing portion of the power take-off shaft as close as possible to the rear end side of the machine body.
And since the bearing part is provided with the reinforcing rib which extends over the boss part fitted to the power take-off shaft and the flange part facing the machine body frame, the bearing part itself having the required strength can be configured with a lightweight structure. There are advantages.
In addition, the flange portion of the bearing portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Thus, the entire bearing portion can be structured to be narrow in the vertical direction, and there is an advantage that it can be attached to a machine frame having a narrow vertical width without any trouble.
Furthermore, since the horizontal frame that connects the left and right front and rear frames, which are strength members, can be the mounting target of the bearing section, the bearing section is placed at a rigid location and at any position in the left-right direction. In addition, since the bearing portion attached to the lateral frame supports the power take-off shaft at a position close to the universal joint, there is an advantage that the power take-out shaft can be stably supported at a position near the rear end of the fuselage. is there.

[Solution 17]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and a power take-out shaft for outputting the driving force on the side of the traveling machine body to the outside at an end on the rear side of the traveling machine body, Is connected to and fixed to the body frame of the traveling machine body, and the bearing part is a boss part that is externally fitted to the power take-off shaft. And a flange portion facing the fuselage frame, and a reinforcing rib extending between the boss portion and the flange portion, the flange portion extending toward the left and right lateral outer sides of the boss portion in the left-right direction. The reinforcing rib is From both the position of the upper side and lower side of the serial boss toward the left and right lateral outer it is that is extended.

[Operations and Effects of Invention According to Solution 17]
According to the invention relating to the solving means 17, the bearing portion for supporting the power take-off shaft is connected and fixed to the airframe frame at the rear end of the traveling airframe. You can make use of itself. Therefore, in order to provide the bearing portion of the power take-off shaft on the rear side of the fuselage, the aircraft frame itself can be used without changing the position of the mission case or making a major design change such as increasing the size of the mission case itself. There is an advantage that it becomes easy to dispose the bearing portion of the power take-off shaft as close as possible to the rear end side of the machine body.
And since the bearing part is provided with the reinforcing rib which extends over the boss part fitted to the power take-off shaft and the flange part facing the machine body frame, the bearing part itself having the required strength can be configured with a lightweight structure. There are advantages.
In addition, the flange portion of the bearing portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Thus, the entire bearing portion can be structured to be narrow in the vertical direction, and there is an advantage that it can be attached to a machine frame having a narrow vertical width without any trouble.

[Solution 18]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism for connecting the working device to move up and down, and a power take-out shaft for outputting the driving force on the side of the traveling machine body to the outside at an end on the rear side of the traveling machine body, Is connected to and fixed to the body frame of the traveling machine body, and the bearing part is a boss part that is externally fitted to the power take-off shaft. And a flange portion facing the body frame, and a reinforcing rib extending between the boss portion and the flange portion.

[Operations and Effects of Invention According to Solution 18]
According to the invention relating to the solving means 18, since the bearing portion for supporting the power take-off shaft is connected and fixed to the airframe at the rear end of the traveling airframe, the airframe is used as a mounting means for the bearing portion. You can make use of itself. Therefore, in order to provide the bearing portion of the power take-off shaft on the rear side of the fuselage, the aircraft frame itself can be used without changing the position of the mission case or making a major design change such as increasing the size of the mission case itself. There is an advantage that it becomes easy to dispose the bearing portion of the power take-off shaft as close as possible to the rear end side of the machine body.
And since the bearing part is provided with the reinforcing rib which extends over the boss part fitted to the power take-off shaft and the flange part facing the machine body frame, the bearing part itself having the required strength can be configured with a lightweight structure. There are advantages.

[Solution 19]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A power take-out shaft for outputting the driving force of the traveling machine body to the outside at the end of the traveling machine body on the side to which the link mechanism is coupled. And a bearing portion for supporting the power take-off shaft at the rear end portion of the traveling aircraft body is connected and fixed to the body frame of the traveling aircraft body.

[Operation and Effect of Invention According to Solution 19]
According to the invention relating to the solving means 19, the bearing part for supporting the power take-off shaft is connected and fixed to the body frame at the rear end of the traveling machine body. You can make use of itself. Therefore, in order to provide the bearing portion of the power take-off shaft on the rear side of the fuselage, the aircraft frame itself can be used without changing the position of the mission case or making a major design change such as increasing the size of the mission case itself. There is an advantage that it becomes easy to dispose the bearing portion of the power take-off shaft as close as possible to the rear end side of the machine body.

[Solution 20]
The other technical means of the present invention taken in order to solve the above-mentioned problems are a traveling machine body capable of traveling, a working device for planting or sowing seedlings on the ground, and the work on the rear side of the traveling machine body. A link mechanism for connecting the devices, the work device is supported by the link mechanism so as to be swingable left and right around the longitudinal axis, and the work device is set by the work device around the longitudinal axis. A rolling control mechanism for controlling to maintain a posture; the rolling control mechanism is a rolling operation electric motor attached to a support frame member connected to the one end side of the link mechanism; A driving pinion attached to the output shaft of the electric motor; and a driven gear attached to the support frame member so as to mesh with the driving pinion; Is configured to control the rolling operation of the working device by switching between the forward and reverse directions, and a spacer member for adjusting the interval is mounted between the support frame member and the rolling operation electric motor. The spacer member is located on the opposite side of the drive pinion with respect to the meshing location of the drive pinion and the driven gear, as viewed in the axial direction of the drive pinion, and the drive That is, it is formed in a V-shape that connects three places on the left and right sides across the pinion axis, and is connected to the support frame member.

[Operations and Effects of Invention According to Solution 20]
According to the invention relating to the solving means 20, the spacer member for adjusting the distance is mounted between the support frame member and the electric motor for rolling operation, and the teeth of the drive pinion provided on the output shaft of the electric motor for rolling operation are provided. The drive pinion and the driven gear can be engaged with each other in the vicinity of the center of the tooth thickness with little influence of the thickness and the tooth thickness of the driven gear.
Therefore, it is advantageous in that it is easy to adopt a commercially available product as an electric motor for rolling operation.
In addition, when the spacer member for adjusting the distance is located on the opposite side of the driving pinion with respect to the meshing position of the driving pinion and the driven gear when viewed from the axial direction of the driving pinion, Since it is formed in a V shape that connects the left and right sides of the pinion with the center of the pinion, it supports the electric motor for rolling operation while avoiding interference between this spacer member and the driven gear and drive pinion. There is an advantage that it can be firmly fixed to the frame member.

[Solution 21]
The other technical means of the present invention taken in order to solve the above problems are a traveling machine body capable of traveling, a working device for performing seedling planting or sowing work on the ground, and the rear side of the traveling machine body. A link mechanism that couples the working device, the working device is supported by the link mechanism so as to be swingable left and right around a longitudinal axis, and the working device is arranged around the longitudinal axis. A rolling control mechanism for controlling the roller so as to be maintained in a set posture, the rolling control mechanism including a rolling operation electric motor attached to a support frame member connected to the one end side of the link mechanism, and the rolling operation thereof; A drive pinion attached to the output shaft of the electric motor for driving, and a driven gear attached to the support frame member so as to mesh with the drive pinion, the rotation of the driven gear The operation is switched between forward and reverse directions to control the rolling operation of the working device, and a spacer member for adjusting the distance is provided between the support frame member and the rolling operation electric motor. It means that it is attached.

[Operation and Effect of Invention According to Solution 21]
According to the invention relating to the solution means 21, the spacer member for adjusting the distance is mounted between the support frame member and the electric motor for rolling operation, and the teeth of the drive pinion provided on the output shaft of the electric motor for rolling operation are provided. The drive pinion and the driven gear can be engaged with each other in the vicinity of the center of the tooth thickness with little influence of the thickness and the tooth thickness of the driven gear.
Therefore, it is advantageous in that it is easy to adopt a commercially available product as an electric motor for rolling operation.

It is a right view of a riding type rice transplanter. It is a top view of a riding type rice transplanter. It is a top view which shows the link mechanism which connects a traveling body and a seedling planting apparatus. It is a top view which shows the attachment location of the link mechanism with respect to the rear part of a traveling body. It is a right view which shows the attachment location of the link mechanism with respect to the rear part of a traveling body. It is the VI-VI sectional view taken on the line in FIG. It is a perspective view which shows the lower link member in a link mechanism. It is a perspective view which shows a bearing part. It is a right view which shows the connection location of a link mechanism and a seedling planting apparatus. It is a right view which shows the connection location of a link mechanism and a seedling planting apparatus. It is a disassembled perspective view which shows a stopper mechanism. It is a front view which shows a seedling planting apparatus. It is sectional drawing which shows a rolling control mechanism. It is explanatory drawing which shows a rolling control mechanism. It is a disassembled perspective view which shows a rolling control mechanism. It is a perspective view which shows the comparative example of a lower link member.

Hereinafter, an example of an embodiment of the present invention will be described based on the drawings.
〔overall structure〕
FIG. 1 shows a right side surface of a riding rice transplanter as an example of a planting work machine.
This riding type rice transplanter includes a pair of left and right steering operations and driveable front wheels 11F and a pair of left and right driveable rear wheels 11R below the body frame 10, and an engine E mounted on the body frame 10. The self-propelled traveling machine body 1 in which the front wheels 11F and the rear wheels 11R are driven by receiving power from the vehicle is provided.
The traveling machine body 1 is provided with a prime mover 13 with an engine E installed in the front part of the machine body, and reserve seedling platforms 14 are provided on the left and right sides thereof. A boarding operation unit having a steering handle 15 and a driving seat 12 for steering the front wheels 11F is provided at the center in the front-rear direction of the traveling machine body 1 on the rear side of the driving unit 13. The seedling planting device 2 is supported at the rear portion of the traveling machine body 1 through a link mechanism 5 having a hydraulic cylinder 52 for raising and lowering operation so as to be raised and lowered.
The riding type rice transplanter configured in this way performs planting work of seedlings such as rice on the field by the seedling planting device 2.

  As shown in FIG. 2, the seedling planting device 2 is configured in an eight-row planting type, and is rotatably supported by four transmission cases 21 and right and left lateral sides of the rear portion of the transmission case 21. A planting case 22, a pair of planting arms 23 (planting claw drive mechanism) provided at both ends of the planting case 22, a grounding float 24, a seedling platform 20 on which a seedling is placed, and the like. . As a result, the planting case 22 is rotationally driven as the seedling platform 20 is reciprocated laterally to the left and right, and the planting arm 23 alternately takes out seedlings from the lower part of the seedling platform 20 and puts them on the rice field. Configured to plant.

A transmission case 3 that pivotally supports a front wheel 11F is connected and fixed to the front part of the body frame 10 in the traveling body 1, and a rear axle case 6 equipped with rear wheels 11R on the left and right is provided at the rear part of the body frame 10. It is supported so that it can roll. A front frame 10F extends forward from the mission case 3, and an engine E is mounted sideways on the front frame 10F.
As shown in FIGS. 2 to 4, on the left and right sides of the transmission case 3, the front axle case 3A extends left and right, and left and right front wheels 11F and 11F are provided. A torque generator (not shown; corresponding to a power steering device) is provided on the upper side of the transmission case 3, and a steering handle 15 is provided on the upper end of a steering operation shaft 15 a erected upward from the torque generator. ing. A main transmission lever 16 that changes the vehicle speed by operating a hydrostatic continuously variable transmission (not shown), which will be described later, is disposed on the side of the steering handle 15.

[Power transmission system]
The power of the engine E is a planting drive for driving the traveling drive system for driving the front wheels 11F and the rear wheels 11R of the traveling drive system, and the seedling planting device 2 as a planting system working device. Is transmitted to the system.
In the travel drive system, the power of the engine E is transmitted to the input shaft of the hydrostatic continuously variable transmission via a belt transmission mechanism (not shown). The hydrostatic continuously variable transmission is used as a main transmission that can be shifted by the main transmission lever 16, and the power shifted by the hydrostatic continuously variable transmission is transmitted into the mission case 3. In the transmission case 3, the power shifted through a gear-type transmission mechanism (not shown) provided therein is transmitted to the front wheels 11F and the rear wheels 11R.

  The power transmitted into the mission case 3 is also transmitted to the seedling planting device 2 of the planting work drive system via an inter-strain transmission mechanism (not shown). The seedling planting device 2 is configured such that a planting claw provided in the planting arm 23 divides a seedling by a predetermined amount from a seedling platform 20 that is reciprocally moved laterally to the left and right, and is planted on a field.

[Link mechanism]
The link mechanism 5 that moves the seedling planting device 2 up and down is configured as follows.
As shown in FIGS. 1, 3 to 6, the link mechanism 5 includes a top link 5T having a pair of left and right link members 50, 50 having a narrow left-right width, and a pair of left and right having a wider left-right width. The lower link 5L provided with the link members 51, 51.
The rear ends of the top link 5T and the lower link 5L are connected to the vertical link 5V. The seedling planting device 2 is connected to and supported by the lower end portion of the vertical link 5V so as to be able to roll left and right around the rolling axis Z in a front-back orientation.

  As shown in FIGS. 3 to 6, the top link 5T has a pair of left and right link members 50, 50 made of rectangular pipe members having a rectangular cross section whose vertical width is larger than the horizontal width. It is bent in a Y-shape in plan view so as to be wider than the separation interval on the rear end side, and the intermediate position in the front-rear direction is welded and integrated by a pair of upper and lower connection plates 50a. Yes.

As shown in FIGS. 3 to 6, the front end side of the top link 5 </ b> T is connected to a support base 4 erected on the upper side of the body frame 10 on the rear side of the traveling body 1.
The body frame 10 includes a pair of left and right front and rear frames 10A and 10A, and a lateral frame 10B that connects and integrates the front and rear frames 10A and 10A on the rear end side. The support base 4 is welded and fixed in a state where it is in contact with the surface 10a on the inward side of the left and right frames 10A and 10A and the surface 10b on the rear side of the side frame 10B. A pair of left and right square pipe-like columns 40, 40 standing upright is provided.
The upper ends of the columns 40, 40 are connected to each other by horizontal members 41, and the upper ends of the left and right columns 40, 40 are mounted on the front seat in the front-rear direction. It is connected and fixed to the base 12 </ b> A via a front and rear frame member 42.

A short cylindrical boss 40a with a cylindrical axis x1 extending in the left-right direction is welded and fixed to the upper portions of the left and right support columns 40, 40 so as to pass through the support columns 40, 40. A pivot shaft 43 that is aligned with each other is inserted.
Bosses 50b and 50b provided at the front ends of the link members 50 and 50 of the top link 5T are fitted on the pivot shaft 43 so as to be relatively rotatable, and between the link members 50 and 50. In the positioned state, a U-shaped connecting arm 52a connected to the cylinder bottom side of the lifting / lowering hydraulic cylinder 52 is fitted via a mounting boss 52b.
In other words, the front end portion of the top link 5T and the front end portion of the hydraulic cylinder 52 are connected to the pivot shaft 43 so as to be relatively rotatable. The left and right bosses 50b and 50b of the top link 5T and the hydraulic cylinder 52, the mounting boss 52b is externally fitted, and the movement in the axial direction is the distance between the bosses 40a, 40a on both sides of the bosses 40a, 40a on both sides by the contact between the bosses 50b, 50b, 52b. The position is regulated within the width.

The pivot shaft 43 is fixedly welded to one end side thereof, and in this embodiment, to the left end portion thereof as shown in FIGS. The end side is configured to be detachable with respect to the bosses 40a, 40a of the support columns 40, 40, and a retaining structure by a retaining pin 46 is provided at the other end.
The locking protrusion 45 abuts on the left lateral surface of the left column 40 of the support base 4 (in this example, abuts on the end surface of the boss 40a slightly protruding from the left lateral surface), and the pivot shaft 43 The first projecting surface 45a that is the limit of movement of the support shaft 40 to the insertion side and the front surface that is in the direction intersecting the left lateral surface of the support column 40, and a locking protruding piece about the axis x1 of the pivot shaft 43 And a second contact surface 45b for preventing the rotation of 45. The locking protrusion 45 is connected and fixed to the support column 40 by a connection bolt 45c that penetrates the left support column 40 in the front-rear direction.
Accordingly, by releasing the connection by the connection bolt 45c and extracting the retaining pin 46 at the other end, the pivot shaft 43 can be extracted and the connection of the front end of the top link 5T to the support base 4 can be released.

  The detent mechanism 44 with respect to the top link 5T is an elevating lever provided on the right side of the driver's seat 12 so that the hydraulic cylinder 52 can be expanded and contracted to raise and lower the seedling planting device. 19 is provided at the end on the left side of the pivot shaft 43 on the side opposite to the side 19. In general, it is often the case that the vehicle body 1 is moved up and down from the left side. When the vehicle is located on the ground, the driver is highly likely to be located on the left side of the link mechanism 5 and is seated on the driver seat 12. This is because there is a high possibility that the lifting arm 19 is operated with the right arm in this state, but the present invention is not limited to this, and the left and right positions of the locking mechanism 44 and the locking pin 46 which is the locking structure on the opposite side are not limited. It may be arranged in reverse.

  The rear end side of the hydraulic cylinder 52 whose front end side is connected to the pivot shaft 43 is connected to the lower portion of the vertical link 5V, and connects the vertical link 5V and the lower link 5L as shown in FIGS. The intermediate position of the cylinder rod 52c is supported by a trapezoidal support fitting whose rear end is connected to the cylindrical shaft portion 5a (see FIG. 12).

  As shown in FIGS. 3 to 7, the lower link 5L has a pair of left and right link members 51, 51 made of rectangular pipe members having a rectangular cross section whose vertical width is larger than the horizontal width. It is arranged in a posture inclined with respect to the center line CL in the longitudinal direction of the body so as to be wider than the separation interval on the rear end side. The left and right link members 51, 51 arranged in this inclined posture are connected and integrated by connecting members 51a, 51a extending in the left-right direction.

A front end portion of the lower link 5 </ b> L is connected to the body frame 10 of the traveling body 1.
Near the rear ends of the pair of left and right front and rear frames 10A and 10A of the body frame 10, the link connecting cylindrical bosses 10C and 10C having the same axis x2 along the left and right direction are fixed by welding in a penetrating state. A horizontal pivot shaft 47 is inserted through each cylindrical boss 10C. On the lower link 5L side, the bosses 51b, 51b are welded and fixed to the front end portions of the pair of left and right link members 51, 51, and the bosses 51b, 51b are externally fitted to the lateral pivot shaft 47, It is pivotally connected.

A flange portion 47 a is formed at an end of the lateral pivot shaft 47 on the laterally outer side of the machine body, and the bosses 51 b and 51 b of the link members 51 and 51 are restricted from being pulled out. Also on the inner end side, a rotation prevention mechanism 44 for preventing rotation of the lateral support shaft 47 is provided.
This detent mechanism 44 has an L-shaped locking piece 48 connected to the inner end side of the lateral pivot shaft 47 by a locking nut 47b so as not to be relatively rotatable, and a connecting bolt 49 that vertically penetrates the front-rear frame 10A. By fixing by the above, the horizontal pivot shaft 47 is fixed to the body frame 10 in a non-rotating state.
The structure that disables relative rotation between the lateral pivot shaft 47 and the L-shaped locking piece 48 is, for example, an oval shaped deformed shaft portion (not shown) formed on the inner end side of the lateral pivot shaft 47. And the like, for example, by fitting an odd-shaped hole having the same shape formed with the L-shaped locking piece 48.

  As shown in FIGS. 3 and 7, the pair of left and right link members 51, 51 constituting the lower link 5 </ b> L are parallel or substantially parallel to the center line CL in the front-rear direction of the body in plan view as shown in FIGS. 3 and 7. In addition, the rear side is inclined to be narrowed rearward so as to approach the center line CL in the front-rear direction of the machine body, and then slightly outwardly bent. The vertical link 5V is connected to the rear end, which is a part formed so as to be parallel or substantially parallel to the center line CL in the longitudinal direction of the machine body.

The left and right lateral pivot shafts 47 of the lower link 5L configured in this way can be pulled out laterally outward without loosening the connecting bolt 49 by loosening the locking nut 47b.
The left and right lateral pivot shafts 47 of the lower link 5L are as high as the locations of the power take-off shafts 30 led to the rear side of the machine body to transmit the driving force from the mission case 3 to the seedling planting device 2. In this position, the extraction to the inside of the machine body is likely to interfere with the power take-off shaft 30 and is subject to spatial restrictions. However, since it is configured to be extracted to the laterally outward side, it is easily extracted. .

[Bearing structure]
As shown in FIGS. 3, 4, and 6, the power take-off shaft 30 is laterally integrated by connecting the front and rear frames 10 </ b> A and 10 </ b> A near the rear end of the body frame 10. The frame 10B is supported by a bearing bracket 31 (corresponding to a bearing portion) located at the center in the left-right direction of the frame 10B.
The bearing bracket 31 includes a boss portion 32 that houses a ball bearing (not shown), and a flange portion 33 that can be connected to the rear surface of the lateral frame 10B.

As shown in FIGS. 6 and 8, the flange portion 33 extends in the left-right direction from the boss portion 32, and is connected to the rear surface side of the lateral frame 10 </ b> B by bolts 34 on the left and right sides of the boss portion 32. .
In addition, reinforcing ribs 35 are integrally formed from both the upper and lower positions of the boss portion 32 in the lateral direction.
The bearing bracket 31 is provided near a universal joint 37 for connecting the power transmission shaft 36 to the power take-out shaft 30.
The universal joint 37 is located near the axial centers x1 and x2 of the top link 5T or the lower link 5L in a plan view, and is located near the axial center x2 of the lower link 5L in the vertical direction.
In this way, the power extraction is performed so that the universal joint 37 is located near the axis x1 and x2 of the top link 5T or the lower link 5L in plan view and near the axis x2 of the lower link 5L in the vertical direction. By supporting the shaft 30 with the bearing bracket 31, the relative posture change between the links 5T and 5L and the transmission shaft 36 during the lifting / lowering operation of the link mechanism 5 can be reduced.

[Stopper mechanism]
As shown in FIGS. 9 to 12, the seedling planting device 2 connected to the vertical link 5V at the rear end of the link mechanism 5 is in contact with the left and right link members 51, 51 of the lower link 5L. Is provided with a stopper mechanism 53 for limiting the rolling operation of the seedling planting device 2.
The stopper mechanism 53 limits the rolling operation of the seedling planting device 2 at the lower limit position and the upper limit side stopper mechanism 54 that limits the rolling operation of the seedling planting device 2 at the upper limit position of the lifting and lowering operation range of the link mechanism 5. Both the lower limit side stopper mechanism 55 are provided.

The upper limit side stopper mechanism 54 comes into contact with the downward surfaces of the left and right link members 51, 51 of the lower link 5L in a state where the link mechanism 5 has reached the upper limit position of the raising / lowering operation range, as indicated by phantom lines in FIG. Further, an elastic material 54a made of rubber or synthetic resin material capable of volume elastic deformation is provided. The elastic material 54a is formed in a columnar shape as shown in FIG. 11, and a metal contact plate 54b for reducing wear is adhered to the upper surface side. The upper surface of the contact plate 54b is a left and right link member 51. , 51 is a contact surface for the downward surface.
This upper limit side stopper mechanism 54 is located at a position facing the downward surface of each of the left and right link members 51, 51, and is an axis x3 (connection) of the connection shaft 56 between the left and right link members 51, 51 and the vertical link 5V. (Corresponding to a point) is located closer to the connection point between the left and right link members 51, 51 and the support 4.

As shown by the solid line in FIG. 10, the lower limit side stopper mechanism 55 is in contact with the downward surfaces of the left and right link members 51, 51 of the lower link 5L in a state where the link mechanism 5 has reached the lower limit position of the lifting operation range. The elastic member 55a made of a volume elastically deformable rubber or a synthetic resin material, and the elastic member 55a comes into contact with the left and right link members 51, 51 after contacting the elastic member 55a. A metal contact member 55c that limits the amount of compressive deformation to a predetermined range.
Also, a metal contact plate 55b for reducing wear is adhered to the upper surface of the elastic member 55a of the lower limit side stopper mechanism 55. The contact plate 55b is slightly larger than the outer diameter of the elastic member 55a and is formed to be the same as or slightly larger than the outer diameter of the contact member 55c so that it can come into contact with the upper end of the contact member 55c. The upper surface of the contact plate 55b is a contact surface with respect to the downward surfaces of the left and right link members 51, 51.
The lower limit side stopper mechanism 55 is located at a position facing the downward surface of each of the left and right link members 51, 51 and more than the axis x3 of the connecting shaft 56 between the left and right link members 51, 51 and the vertical link 5V. The left and right link members 51, 51 and the support 4 are positioned so as to be farther away from the connecting portion.

The left and right upper limit stopper mechanisms 54 and the lower limit stopper mechanism 55 are provided on the left and right sides of a U-shaped mounting base member 57 fixed to the front portion of the seedling planting device 2, as shown in FIGS. It is provided in a state of being sorted.
The elastic material 54a of the upper limit side stopper mechanism 54 and the elastic material 55a of the lower limit side stopper mechanism 55 are formed with a through hole at the center, and a connecting bolt 54d provided continuously on the lower surface side of each contact plate 54b, 55b. , 55d are connected and fixed by fixing double nuts 57c, 57d on the back side (lower surface side) of the receiving seats 57a, 57b of the mounting base member 57.

  The upper surfaces of the contact plates 54b and 55b of the left and right upper limit side stopper mechanisms 54 and the lower limit side stopper mechanism 55 that contact the lower surfaces of the left and right link members 51 and 51 are in contact with the upper surfaces of the contact plates 54b and 55b. The direction of the upper surface of each contact plate 54b, 55b is set so that it is a surface perpendicular to the up-and-down movement trajectory of the lower edge portion of the left and right link members 51, 51 in the corresponding range. It is attached.

[Rolling control device]
The seedling planting device 2 is configured so that the rolling operation is restrained by using the stopper mechanism 53 described above at the upper limit or the lower limit of the ascending / descending range. It is configured to be able to roll left and right around the longitudinal axis Z.
As shown in FIGS. 12 and 13, the left and right rolling includes a support frame member 70 that is integrally provided on the upper portion of the vertical link 5 </ b> V, and a guide rail that is integrally provided on the back side of the seedling platform 20. A balance spring 20B connecting the left and right ends of 20A is urged so that the seedling table 20 can be easily restored to a predetermined angle range with respect to the horizontal direction.
Further, the support frame member 70 integrally provided on the upper portion of the vertical link 5V is provided with a drive adjustment pulley 72 that is driven in the forward / reverse direction by a rolling operation electric motor 71. The ends of the wire 73 with the intermediate part wound around are connected to the left and right ends of the seedling support frame 25 that supports the back side of the seedling support base 20 via buffer springs 73a. The seedling platform 20 is configured to be capable of a forced rolling operation by a reverse operation.

Power transmission from the rolling operation electric motor 71 that drives the drive adjustment pulley 72 to the drive adjustment pulley 72 is shown in FIGS.
A drive pinion 74 attached to the output shaft 71a of the electric motor 71 for rolling operation, and a driven gear 75 that rotates integrally with the drive adjustment pulley 72 attached to the support frame member 70 so as to mesh with the drive pinion 74. It is provided and is configured to control the rolling operation of the seedling planting device 2 by switching the rotation direction of the driven gear 75 between forward and reverse directions.

The electric motor 71 for rolling operation is connected and fixed to the support frame member 70 so that the drive pinion 74 attached to the output shaft 71a meshes with the driven gear 75. A spacer member 76 is interposed between opposing surfaces of the frame member 70 and the rolling operation electric motor 71.
By interposing the spacer member 76 in this way, the electric motor 71 for rolling operation is separated from the support frame member 70 by the thickness of the spacer member 76, and the drive pinion 74 attached to the output shaft 71a is also correspondingly increased. Move in the same direction.
As a result, the drive pinion 74 attached to the output shaft 71a can be assembled in a state where the center position in the thickness direction of the drive pinion 74 substantially matches the center position of the driven gear 75 in the thickness direction.

  As shown in FIGS. 14 and 15, the spacer member 76 is formed in a substantially V shape when viewed in the axial direction of the output shaft 71 a. This is because, while avoiding interference with the driven gear 75 and the drive pinion 74, the rolling operation electric motor 71 is supported by the support frame at a position where the rolling operation electric motor 71 is as close as possible to the meshing position between the driven gear 75 and the drive pinion 74. This is for connecting and fixing to the member 70.

  By using the spacer member 76 as described above, even if the drive pinion 74 attached to the commercially available rolling operation electric motor 71 is used, the center position in the thickness direction of the drive pinion 74 is set to the thickness of the driven gear 75. It can be adjusted to match the center position in the direction.

[Other Embodiment 1]
In the above embodiment, as the locking protrusion 45, the structure having the first contact surface 45a and the second contact surface 45b in the direction intersecting with the first contact surface 45a is exemplified, but the present invention is not limited to this. .
For example, the locking projection piece may be configured by a flat plate, a bar, or the like attached so as to protrude outward in the radial direction from the shaft diameter of the pivot shaft 43. In this case, since the rotation cannot be prevented only by the presence of a flat plate or the like, it is bolted so that the flat plate or the like is fixed to the support base 4, or a flat plate or bar is fitted. You may provide a recessed part in the support stand 4 side.
Other configurations may be the same as those in the above-described embodiment.

[Second embodiment]
In the above embodiment, the locking protrusion 45 includes the first contact surface 45a and the second contact surface 45b in the direction intersecting with the first contact surface 45a, and the locking protrusion 45 is supported by the connecting bolt 45c. Although the structure fixed to the 4 side was illustrated, it is not limited to this structure.
For example, the connecting bolt 45c that fixes the locking protrusion 45 can be omitted. In this case, the locking protrusion 45 has two surfaces intersecting each other and is applied to the support base 4, so that if the pivot shaft 43 is prevented from coming off, it is not necessary to be bolted. Thus, it is possible to maintain the detent state with respect to the support base 4.
Other configurations may be the same as those in the above-described embodiment.

[3 of another embodiment]
In the above-described embodiment, the elastic members 54a and 55a made of a volume elastically deformable rubber or a synthetic resin material are shown as the stopper mechanism 53. However, the present invention is not limited to this. It may be configured.
Other configurations may be the same as those in the above-described embodiment.

[4 of another embodiment]
In the above embodiment, the stopper mechanism 53 is exemplified as having the structure including both the upper limit side stopper mechanism 54 and the lower limit side stopper mechanism 55, but is not limited to this, and is used for the upper limit or the lower limit. Even if the stopper mechanism 53 is provided only on one side, there is no problem.
Other configurations may be the same as those in the above-described embodiment.

[5 of another embodiment]
In the above embodiment, as the stopper mechanism 53, the upper limit side stopper mechanism 54 and the lower limit side stopper mechanism 55 are exemplified by a structure in which the ring-shaped contact member 55c is provided only on the lower limit side stopper mechanism 55 side. The structure is not limited to this.
For example, the ring-shaped contact member 55c may be provided only on the upper limit side stopper mechanism 54 side, and the ring-shaped contact member 55c is provided on both the upper limit side stopper mechanism 54 and the lower limit side stopper mechanism 55. It may be provided. Further, the shape of the contact member 55c is not limited to a ring shape, and an appropriate structure such as a rectangular shape, an elliptical shape, or a structure in which a discontinuous bar is erected in an annular shape can be adopted. .
Other configurations may be the same as those in the above-described embodiment.

  The object to which the present invention is applied is not limited to a riding type rice transplanter, but may be other planting work machines such as a riding type direct seeding machine.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Working apparatus 3 Mission case 4 Support stand 5 Link mechanism 5V Vertical link 10 Airframe frame 10A Front-back frame 10B Horizontal frame 12 Driver's seat 19 Operation lever 30 Power take-off shaft 31 Bearing part 32 Boss part 33 Flange part 35 Reinforcement rib 36 Transmission shaft 37 Universal joint 43 Pivot shaft 44 Anti-rotation mechanism 45 Locking protrusion 45a First contact surface 45b Second contact surface 45c Fixing bolt 47 Lateral support shaft 51, 51 Link member 53 Stopper mechanism 54 Upper limit side stopper Mechanism 55 Lower limit side stopper mechanism 70 Support frame member 71 Electric motor for rolling operation 74 Drive pinion 75 Driven gear 76 Spacer member x1 Horizontal axis x3 Connection point

Claims (21)

A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling machine body includes a driver seat near the center in the left-right direction, a support base for connecting the link mechanism in the vicinity of the rear side of the driver seat, and the left and right sides of the driver seat. An operation lever is disposed at one side portion in the direction to be gripped and operated by a driver sitting on the driver seat,
The support base is provided with a pivot shaft that supports the link mechanism so as to swing up and down around a horizontal axis along the left-right direction.
The pivot shaft is configured to be insertable / removable at one end side with respect to the support base, and includes a rotation prevention mechanism at an end portion on the opposite side to the end portion on the insertable / removable side,
The detent mechanism includes a locking protrusion that is fixed so as to be positioned on the opposite side to the side on which the operation lever is disposed in the left-right direction with respect to the pivot shaft.
The locking projecting piece is in contact with the lateral side surface of the support base and faces the front side of the support base in a direction intersecting the lateral side surface and a first contact surface that becomes a limit of movement of the pivot shaft toward the insertion side A second contact surface that abuts against the surface or the rearward facing surface to prevent rotation of the locking projection piece, and the locking projection piece is connected and fixed to the support base by a fixing bolt. Planting work machine that has been. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling machine body includes a support base for connecting the link mechanism,
The support base is provided with a pivot shaft that supports the link mechanism so as to swing up and down around a horizontal axis along the left-right direction.
The pivot shaft is configured to be insertable / removable at one end side with respect to the support base, and includes a rotation prevention mechanism at an end portion on the opposite side to the end portion on the insertable / removable side,
The detent mechanism includes a locking protrusion fixed to the pivot shaft,
The locking projecting piece is in contact with the lateral side surface of the support base and faces the front side of the support base in a direction intersecting the lateral side surface and a first contact surface that becomes a limit of movement of the pivot shaft toward the insertion side A second contact surface that abuts against the surface or the rearward facing surface to prevent rotation of the locking projection piece, and the locking projection piece is connected and fixed to the support base by a fixing bolt. Planting work machine that has been. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling machine body includes a support base for connecting the link mechanism,
The support base is provided with a pivot shaft that supports the link mechanism so as to swing up and down around a horizontal axis along the left-right direction.
The pivot shaft is configured to be insertable / removable at one end side with respect to the support base, and includes a rotation prevention mechanism at an end portion on the opposite side to the end portion on the insertable / removable side,
The detent mechanism includes a locking protrusion fixed to the pivot shaft,
The locking projecting piece is in contact with the lateral side surface of the support base and faces the front side of the support base in a direction intersecting the lateral side surface and a first contact surface that becomes a limit of movement of the pivot shaft toward the insertion side A second contact surface that abuts against the surface or the rearward facing surface and prevents rotation of the locking projection piece, and the locking projection piece is connected and fixed to the support base. Planting work machine. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling machine body includes a support base for connecting the link mechanism,
The support base is provided with a pivot shaft that supports the link mechanism so as to swing up and down around a horizontal axis along the left-right direction.
The pivot shaft is configured to be insertable / removable at one end side with respect to the support base, and includes a rotation prevention mechanism at an end portion on the opposite side to the end portion on the insertable / removable side,
The non-rotating mechanism includes a locking protrusion fixed to the pivot shaft, and the locking protrusion is connected and fixed to the support base. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
In the link mechanism, a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body is attached to the lateral outer side of the connection point to the machine body frame,
Each of the left and right link members is pivotally supported separately on the left and right with respect to a pair of left and right lateral pivots whose front ends connected to the body frame have horizontal axes on a straight line along the left and right direction. And
The left and right lateral pivot shafts are disposed at predetermined intervals between the end portions on the inward side of the machine body, and are provided with a rotation prevention mechanism at the end portions on the inward side in the left-right direction. Mounted in a non-rotating state with respect to the machine frame and configured to be able to be pulled out laterally outward in the left-right direction,
A planting work machine in which a power take-out shaft for taking out power from the power source installed in the traveling machine body is disposed within the width of the predetermined interval. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
In the link mechanism, a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body is attached to the lateral outer side of the connection point to the machine body frame,
Each of the left and right link members is pivotally supported separately on the left and right with respect to a pair of left and right lateral pivots whose front ends connected to the body frame have horizontal axes on a straight line along the left and right direction. And
The left and right lateral pivot shafts are disposed at predetermined intervals between the end portions on the inward side of the machine body, and are provided with a rotation prevention mechanism at the end portions on the inward side in the left-right direction. A planting work machine that is attached to the machine frame in a non-rotating state and is configured to be able to be pulled out laterally outward in the left-right direction. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
In the link mechanism, a pair of left and right link members that connect the work device to the machine body frame of the traveling machine body is attached to the lateral outer side of the connection point to the machine body frame,
Each of the left and right link members is pivotally supported separately on the left and right with respect to a pair of left and right lateral pivots whose front ends connected to the body frame have horizontal axes on a straight line along the left and right direction. And
The left and right lateral pivot shafts are disposed at predetermined intervals between the respective end portions on the inward side of the body, and are mounted in a non-rotating state with respect to the body frame and in the left-right direction. Planting work machine configured to be able to be pulled out to the laterally outer side. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a pair of left and right link members that connect the working device to the traveling machine body,
The right and left link members are planting work machines configured by a single rectangular tube-shaped pipe member in which an intermediate portion in the front-rear direction is bent in the left-right direction. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism is in contact with the link member after contact of the elastic member with the elastic member made of rubber or a synthetic resin material capable of volume elastic deformation by contact with the link member, A contact member that limits the amount of compressive deformation of the elastic material to a predetermined range, and the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material,
The stopper mechanism includes both an upper limit side stopper mechanism that limits the rolling operation of the working device at the upper limit position of the lifting and lowering operation range of the link mechanism, and a lower limit side stopper mechanism that limits the rolling operation of the working device at the lower limit position. With
The elastic material provided in the upper limit side stopper mechanism and the elastic material provided in the lower limit side stopper mechanism each have a contact surface against the lower edge of the link member, and each contact surface is It is configured to be a surface perpendicular to the up and down movement trajectory of the lower edge portion of the link member in a range corresponding to the portion that contacts the contact surface,
The elastic member provided in the upper limit side stopper mechanism is located closer to the connection point of the link member with respect to the traveling machine body than the connection point between the link member and a vertical link that supports the work device so as to be able to roll. The elastic member provided in the lower limit side stopper mechanism is configured such that the link member is connected to the traveling machine body rather than a connection point between the link member and a vertical link that supports the working device so as to be capable of rolling operation. Planting work machine installed at a position far from the place. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism is in contact with the link member after contact of the elastic member with the elastic member made of rubber or a synthetic resin material capable of volume elastic deformation by contact with the link member, A contact member that limits the amount of compressive deformation of the elastic material to a predetermined range, and the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material,
The stopper mechanism includes both an upper limit side stopper mechanism that limits the rolling operation of the working device at the upper limit position of the lifting and lowering operation range of the link mechanism, and a lower limit side stopper mechanism that limits the rolling operation of the working device at the lower limit position. With
The elastic material provided in the upper limit side stopper mechanism and the elastic material provided in the lower limit side stopper mechanism each have a contact surface with respect to the lower edge of the link member, and each contact surface is A planting work machine configured to be a plane perpendicular to the up-and-down movement locus of the lower edge portion of the link member in a range corresponding to a portion in contact with the contact surface. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism is in contact with the link member after contact of the elastic member with the elastic member made of rubber or a synthetic resin material capable of volume elastic deformation by contact with the link member, A contact member that limits the amount of compressive deformation of the elastic material to a predetermined range, and the contact member is formed in a ring shape so as to surround the outer periphery of the elastic material,
The stopper mechanism includes both an upper limit side stopper mechanism that limits the rolling operation of the working device at the upper limit position of the lifting and lowering operation range of the link mechanism, and a lower limit side stopper mechanism that limits the rolling operation of the working device at the lower limit position. Planting work machine equipped with. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism is in contact with the link member after contact of the elastic member with the elastic member made of rubber or a synthetic resin material capable of volume elastic deformation by contact with the link member, A planting work machine comprising: a contact member that limits the amount of compressive deformation of the elastic material to a predetermined range; and the contact member is formed in a ring shape so as to surround an outer periphery of the elastic material. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism is in contact with the link member after contact of the elastic member with the elastic member made of rubber or a synthetic resin material capable of volume elastic deformation by contact with the link member, A planting work machine comprising a contact member that limits the amount of compressive deformation of the elastic material to a predetermined range. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The link mechanism includes a link member that connects the working device to the traveling machine body,
A stopper mechanism is provided between the link member and the work device to limit the rolling operation of the work device by contact with the link member at a predetermined lifting operation position of the link mechanism,
The stopper mechanism comes into contact with the link member after the elastic material that is elastically deformable in the compression direction by contact with the link member, and the elastic material contacts the link member, and reduces the amount of compressive deformation of the elastic material. A planting work machine having a hitting member limited to a predetermined range. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling body includes a body frame in which a front and rear frame along the front and rear direction on both the left and right sides and a lateral frame that connects the left and right front and rear frames are integrated.
A power take-out shaft for outputting the driving force on the traveling aircraft body side to the outside is provided at the rear end of the traveling aircraft body,
The power take-off shaft is disposed within the vertical width of the body frame in a side view, and a power transmission shaft for transmitting a driving force to the work device is connected to the power take-off shaft via a universal joint. Concatenated,
A bearing portion for supporting the power take-off shaft at the end on the rear side of the traveling machine body is attached to the lateral frame at a position close to the universal joint in the front-rear direction,
The bearing portion includes a boss portion externally fitted to the power take-off shaft, a flange portion facing the body frame, and a reinforcing rib extending between the boss portion and the flange portion,
The flange portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Planting work machine that has been. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
The traveling body includes a body frame in which a front and rear frame along the front and rear direction on both the left and right sides and a lateral frame that connects the left and right front and rear frames are integrated.
A power take-out shaft for outputting the driving force on the traveling aircraft body side to the outside is provided at the rear end of the traveling aircraft body,
A transmission shaft for transmitting a driving force to the working device is connected to the power take-off shaft via a universal joint,
A bearing portion for supporting the power take-off shaft at the end on the rear side of the traveling machine body is attached to the lateral frame at a position close to the universal joint in the front-rear direction,
The bearing portion includes a boss portion externally fitted to the power take-off shaft, a flange portion facing the body frame, and a reinforcing rib extending between the boss portion and the flange portion,
The flange portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Planting work machine that has been. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
A power take-out shaft for outputting the driving force on the traveling aircraft body side to the outside is provided at the rear end of the traveling aircraft body,
A bearing portion for supporting the power take-off shaft at the end on the rear side of the traveling machine body is connected and fixed to a body frame of the traveling machine body;
The bearing portion includes a boss portion externally fitted to the power take-off shaft, a flange portion facing the body frame, and a reinforcing rib extending between the boss portion and the flange portion,
The flange portion extends in the left-right direction toward the left and right lateral outer sides of the boss portion, and the reinforcing rib extends from both positions of the upper side and the lower side of the boss portion toward the lateral left and right sides. Planting work machine that has been. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
A power take-out shaft for outputting the driving force on the traveling aircraft body side to the outside is provided at the rear end of the traveling aircraft body,
A bearing portion for supporting the power take-off shaft at the end on the rear side of the traveling machine body is connected and fixed to a body frame of the traveling machine body;
The bearing portion includes a boss portion that is externally fitted to the power take-out shaft, a flange portion that faces the machine body frame, and a planting work that includes a reinforcing rib that extends between the boss portion and the flange portion. Machine. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism for connecting the working device to the rear side of the traveling machine body and moving up and down;
A power take-out shaft for outputting the driving force on the traveling machine body side to the outside is provided at the end of the traveling machine body on the side where the link mechanism is connected,
A planting work machine in which a bearing portion for supporting the power take-off shaft at an end portion on the rear side of the traveling machine body is connected and fixed to a body frame of the traveling machine body. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism connecting the working device to the rear side of the traveling machine body,
The working device is supported by the link mechanism so as to be swingable left and right around a longitudinal axis.
The working device includes a rolling control mechanism that controls the working device to be maintained in a set posture around the longitudinal axis.
The rolling control mechanism includes a rolling operation electric motor attached to a support frame member connected to the one end side of the link mechanism, a drive pinion attached to an output shaft of the rolling operation electric motor, and a drive thereof A driven gear attached to the support frame member so as to mesh with the pinion, and configured to control the rolling operation of the working device by switching the rotation direction of the driven gear to the forward and reverse directions,
Further, a spacer member for adjusting a gap is mounted between the support frame member and the rolling operation electric motor,
The spacer member, when viewed in the axial direction of the drive pinion, is located on the opposite side of the drive pinion with respect to the meshing location of the drive pinion and the driven gear, and the drive pinion A planting work machine that is formed in a V shape that connects three locations on both the left and right sides with an axis interposed therebetween, and is connected to the support frame member. A traveling aircraft capable of traveling,
A working device for planting or sowing seedlings on the ground;
A link mechanism connecting the working device to the rear side of the traveling machine body,
The working device is supported by the link mechanism so as to be swingable left and right around a longitudinal axis.
The working device includes a rolling control mechanism that controls the working device to be maintained in a set posture around the longitudinal axis.
The rolling control mechanism includes a rolling operation electric motor attached to a support frame member connected to the one end side of the link mechanism, a drive pinion attached to an output shaft of the rolling operation electric motor, and a drive thereof A driven gear attached to the support frame member so as to mesh with the pinion, and configured to control the rolling operation of the working device by switching the rotation direction of the driven gear to the forward and reverse directions,
Further, a planting work machine in which a spacer member for adjusting a gap is mounted between the support frame member and the electric motor for rolling operation.

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