JP2017209087A5 - - Google Patents

Description

Work vehicle

  The present invention relates to a seedling transplanting machine that is provided with a leveling roller on the front side of the machine body and that is planted and traveled while leveling.

The seedling transplanter shown in the prior patent document 1 includes a leveling roller that detects the height of the ridge by changing the vertical position and changes the vertical height of the traveling vehicle body while leveling the farm scene on the front side of the machine body.
By the above leveling roller, the planting depth of the seedling can be adjusted to the height of the cocoon by changing the vertical height of the traveling vehicle body according to the change of the heel height. Is stable and the growth of the crop is stable.
Moreover, the seedling transplanting machine shown in the prior patent document 2 is provided with a spare seedling stand for loading a spare seedling tray in the left and right central part of the machine body. This eliminates the need to carry the seedling tray to the machine body every time there is no seedling from the seedling planting device, thereby improving the work efficiency and reducing the labor of the operator.

JP 2011-97862 A JP 2009-261278 A

However, since the seedling transplanting machine shown in the prior patent document 1 detects the change in the height of the cocoon with the leveling roller, the unevenness of the cocoon is not sufficiently leveled, and the planting depth of the seedling is not an appropriate depth. There is a problem that adversely affects the growth of seedlings.
In addition, since the seedling transplanting machine shown in the prior patent document 2 has a limited space for loading a spare seedling stand, depending on the size of the field, work for replenishing the seedling tray is frequently required, resulting in reduced work efficiency. The problem of increased labor for workers arises.

  An object of the present invention is to provide a seedling transplanting machine that can secure the seedling planting depth by effective leveling of the irregularities of the ridges and can increase the loading capacity of the seedling tray.

  The invention according to claim 1 is a seedling planting device (P) for planting a seedling stock in a seedling tray in a field, and a leveling device for leveling unevenness of a ridge surface on which the seedling planting device (P) plants a seedling ( 4) and a seedling transplanting machine configured to be able to run on a field, including a seedling transplanter (T) on which a seedling tray to be supplemented to the seedling planting device (P) is loaded, the leveling device (4) includes: The leveling roller (11) for leveling the unevenness of the ridge surface at the front position of the machine body, and the rotating arm (12) pivotally supported on the rotating shaft (13) so that the support height of the leveling roller (11) can be changed. And a fixing plate (14) for fixing the rotating arm (12), and fixing and releasing of the fixing plate (14) can be switched by the rotating shaft (13). .

  The invention according to claim 2 is the invention according to claim 1, wherein a plurality of selection holes (12e) for switching a support height are formed in the rotating arm (12), and a connection hole ( 14a), and the pivot shaft (13) is inserted into the operation grips (13c, 13d) formed on both side ends thereof, one of the selection holes (12e) and the connection hole (14a). The connecting projection (13a) is formed so as to be slidable in the vehicle width direction, and an urging member (13b) for urging the connecting projection (13a) toward the connecting side is provided. And

  According to a third aspect of the present invention, in the first or second aspect of the invention, the left and right roller arms (11a, 11a) that pivotally support the leveling roller (11) are provided at the tip of the rotating arm (12). And left and right roller suspension stays (16b, 16b) that support the left and right roller arms (11a, 11a) in a suspended manner, and the leveling roller is moved along with the ascending support of the rotating arm (12). (11) A link arm (15) for controlling the posture of the roller suspension stay (16b, 16b) is provided so that the roller suspension stay (16b, 16b) can be moved backward, and a spring (17a) for urging the roller arm (11a, 11a) downward. The roller suspension stays (16b, 16b) are provided.

Relating to the invention according to claims 1 to 3 above, the first related invention, prior Symbol preliminary seedling table (T) is provided on the side edges of the vehicle body rectangular frame-shaped seedling frame frame ( 21) and a seedling receiving plate (22) for receiving a seedling tray in the seedling frame frame (21), and for seedling tray loading via a connecting member (23) on the outer side of the seedling frame frame (21) An extended seedling stand (T1) is provided.

The second related invention is the first related invention, wherein the seedling frame frame (21) is higher than the receiving surface (22a) of the seedling receiving plate (22) at the outer end of the preliminary seedling stand (T). ) Protrudes to form a side seedling receiving portion (21a), and the connecting member (23) includes a lower mounting member (23a) integrally provided at an inner end portion of the extension seedling stand (T1), An upper mounting member (23c) that is integrally fixed by a fastening member (23b) across the seedling frame (21) on the mounting member (23a), and an upper mounting member (23c) and a lower mounting member (23a) And a protective member (23d) that secures a tightening limit therebetween.

According to a third related invention, in the second related invention, the extended seedling stand (T1) includes a rectangular frame-shaped extended seedling frame frame (24) and a seedling tray on the extended seedling frame frame (24). The auxiliary seedling receiving plate (25) to be received is formed, and the upper end portion of the fastening member (23b) is formed below the height of the receiving surface (22a) of the seedling receiving plate (22) of the preliminary seedling stand (T). It is characterized by that.

According to a fourth related invention, in the third related invention, the extended seedling frame (24) has the same shape as the seedling frame (21).

Further, a fifth related invention is the fourth related invention, wherein a rotation support portion (26) is provided between the extended seedling table (T1) and the lower mounting member (23a) to provide the extended seedling table ( T1) is pivotally supported so that it can be flipped up to the traveling vehicle body side.

  According to the first aspect of the present invention, the leveling device (4) provided on the front side of the traveling vehicle body can plant the seedling after the leveling roller (11) leveles the unevenness of the ridge surface. The seedling is stable and the growth of the seedling is improved. Further, the rotating arm (12) can switch the supporting height of the leveling roller (11) by releasing the connection of the fixed plate (14) by the rotating shaft (13). Reduction and weight reduction are achieved.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the plurality of selection holes (12e) of the rotating arm (12) and the connection projections (14a) of the fixed plate (14) By inserting and connecting (13a), the rotating arm (12) is positioned at the selected position, and grips (13c, 13d) are provided on both the left and right sides of the rotating shaft (13) to enable operation. The operator can push and pull the pivot shaft (13) to switch between the connection and release of the pivot arm (12) and the fixed plate (14), so that no extra movement is required. Thus, the work efficiency can be improved and the labor of the worker can be reduced.
Further, by urging the rotating shaft (13) to the connection side by the urging member (13b), it is possible to prevent the connected state from being released due to a load during work, so the support height of the leveling device changes. There is no such thing, and the unevenness of the field scene can be leveled reliably.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the roller suspension stays (16b, 16b) are not controllable by the rotating arm (12) and the link arm (15). When an equal four-sided link is formed and the leveling roller (11) is rotated toward the traveling vehicle body during storage, the link arm (15) and the roller suspension stays (16b, 16b) overlap in a side view and the roller arm (11a , 11a) can be positioned closer to the traveling vehicle body than the front end of the leveling roller (11), and the amount of front protrusion of the leveling device (4) can be suppressed.

In addition claim 1 the effect of the invention according to claim 3, the first relevant invention, via a coupling member (23) to the outer portion of the rectangular frame-shaped seedling frame frame provided on the machine body side edge (21) By providing the extension seedling stand (T1), it is possible to increase the loading amount of the seedling tray, so that the time during which the operation is interrupted by the replenishment operation of the seedling tray is suppressed, and the work efficiency is improved. Further, since the number of times the worker goes to take the seedling tray can be suppressed, the labor of the worker is reduced.

According to the second related invention, in addition to the effects of the first related invention, by attaching the extended seedling stand (T1) to the lower part of the seedling frame (21) of the preliminary seedling stand (T), the side seedling receiving portion Since interference with (21a) can be prevented, the stacking range of the seedling tray of the preliminary seedling stand (T) is prevented from being blocked.
Further, by providing the protective member (23d) between the upper mounting member (23c) and the lower mounting member (23a), the seedling frame (21) is deformed by tightening the fastening member (23b) too much. Therefore, the seedling tray can be prevented from being disturbed and the seedling tray can be prevented from falling.

According to the third related invention, in addition to the effect of the second related invention, the upper end portion of the fastening member (23b) is made lower than the height of the receiving surface (22a) of the seedling receiving plate (22) of the preliminary seedling stand (T). The formation prevents the fastening member (23b) from being caught on the seedling tray, prevents the seedling tray from being difficult to remove, reduces the work efficiency, and prevents the seedling tray from being damaged and cannot be used for planting work. Is done.

According to the fourth related invention, in addition to the effects of the third related invention, the extended seedling frame frame (24) has the same shape as the seedling frame frame (21). Since the extension seedling stand (T1) can be attached to the direction, the number of extension seedling stands (T1) can be changed according to the number of seedling trays to be used, and the number of seedling tray replenishment operations can be reduced. it can.

According to the fifth related invention, in addition to the effects of the fourth related invention, the extension seedling base (T1) is pivotally supported by the lower mounting member (23a) via the rotation support portion (26) and jumps to the traveling vehicle body side. By making it possible to lift, it is not necessary to remove the extension seedling stand (T1) during transportation or storage, so that the work efficiency is improved and the labor of the operator is reduced.

Perspective view of the main part of the aircraft Side view of leveling device Development front view of leveling device Single side view of rotating arm Side view of main part of control link Side view during leveling work (a) and storage (b) of leveling roller Exploded perspective view (a) and assembly front view (b) of spare seedling stand Expanded cross-sectional view of the main part of the extension seedling stand Exploded perspective view of the extension seedling mounting structure Action diagram of front wheel slide

  Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings. In the description, the front and rear and the left and right are referred to based on the forward direction F of the work implement.

  The seedling transplanter 1 includes a seedling planting device 2 for planting a seedling stock in a seedling tray in a field and a spare seedling table 3 on which a spare seedling tray is loaded so as to be able to travel on the field. As shown in FIG. 1, a perspective view of the main part is provided with a leveling device 4 for leveling the unevenness of the ridge surface.

(Leveling equipment)
As shown in FIGS. 2 and 3, the leveling device 4 sequentially supports the leveling roller 11 by projecting to the front of the machine body with the rotating arm 12, and the base end of the rotating arm 12. The part is pivotally supported on the rotation shaft 13 and the protruding height of the rotation arm 12 can be switched by the fixed plate 14.

  Further, the leveling roller 11 is supported at the tip of the rotating arm 12 via the left and right roller arms 11a, 11a, and is connected to a link arm 15 provided in the vicinity of the rotating arm 12 so as to be integrated with the left and right hanging stays. 16b and 16b are provided, and the left and right roller arms 11a and 11a are configured to be controlled to be suspended via the action members 17 and 17, respectively.

(Rotating arm)
Specifically, as shown in FIG. 4, a single side view of the rotating arm 12 is constructed by integrally arranging left and right arm members 12b, 12b on both sides of the central plate 12c, and is integrated with the base end portion thereof. The porous plate 12d is provided, and a plurality of selection holes 12e... Arranged in an arc shape around the rotation shaft 13 are formed in the porous plate 12d.

  The rotating shaft 13 is integrally provided with a connecting pin 13a that can be inserted into the selection hole 12e of the perforated plate 12d, is slidably supported in the axial direction, and is provided with a spring 13b so that the connecting pin 13a is inserted into the selection hole 12e. In order to energize the holding pin and release the insertion and connection of the connecting pin 13a, a pulling operation grip 13c is provided at one end and a pressing operation grip 13d is provided at the other end.

  The fixed plate 14 includes a guide hole 14a through which the connecting pin 13a is inserted and held, and the rotational angle position of the porous plate 12d can be selected via the connecting pin 13a supported by the guide hole 14a.

(Link structure)
The link arm 15 pivotally supports the proximal end fulcrum 15a in the vicinity of the rotating shaft 13, and provides a control link 16 between the distal end fulcrum 15b and the roller arm fulcrum 12a to form an unequal four-sided link. As shown in FIG. 5, the control link 16 integrally includes a support shaft 16 a that is pivotally supported on the roller arm fulcrum 12 a and left and right suspension stays 16 b and 16 b. Depending on the support height, the roller arms 11a and 11a are suspended via the left and right action members 17 and 17, respectively, so that the posture can be controlled, and springs 17a and 17a that bias downward are provided to elastically ground the leveling roller 11 Configure as possible. The upper ends of the springs 17a and 17a are connected to the left and right suspension stays 16b and 16b, and the lower ends are connected to mounting holes 11b and 11b formed in the left and right roller arms 11a and 11a.

  As shown in FIG. 6A, the leveling device 4 having the above-described structure is suspended by the link arm 15 when the rotating arm 12 is fixed at the lowered position by operating the rotating shaft 13 as shown in FIG. Since the lower stays 16b and 16b are controlled to rotate downward, the urging force of the springs 17a and 17a acting on the roller arms 11a and 11a elastically grounds the leveling roller 11 to the surface, and the surface is leveled. can do.

  Further, as shown in FIG. 6B, a side view when the leveling roller 11 is stored is shown in FIG. 6B. When the rotating arm 12 is fixed at the raised position, the suspension stays 16b and 16b are raised and rotated by the link arm 15. Therefore, the roller arms 11a and 11a rotate backward to hold the leveling roller 11 in the retracted position.

  In this way, the rotating arm 12 is connected and fixed to the fixed plate 14 at the selected position of the selection hole 12e... By the connecting pin 13a by the operation of the rotating shaft 13, and supports the leveling roller 11 in a projecting manner. And the support height of the leveling roller 11 can be switched.

  Therefore, no special switching parts are required, the number of parts can be reduced, and the weight can be reduced. Further, by providing the leveling device 4 on the front side of the traveling vehicle body, the seedling can be planted after leveling the unevenness of the ridge surface, so that the seedling planting depth is stable and the seedling grows well.

Further, when the height of the leveling roller 11 is adjusted, grips 13c,
By providing 13d and enabling operation, the operator can switch the connection and release of the rotating arm 12 and the fixed plate 14 by pushing and pulling the rotating shaft 13 on either the left or right side of the machine body. Extra movement is not required, improving work efficiency and reducing the labor of the worker.

  Further, by urging the rotating shaft 13 to the connection side by the urging member 13b, it is possible to prevent unintentional disconnection due to a load during work and to keep the supporting height of the leveling roller 11 constant. It is possible to level the unevenness.

(Spare seedling stand)
Next, as shown in FIG. 7, an exploded perspective view (a) and an assembled front view (b) of the preliminary seedling stand T arranged at the side edge of the traveling vehicle body are rectangular frames having reinforcing members in the front-rear direction. A seedling frame frame 21 and a seedling receiving plate 22 that receives a seedling tray in the seedling frame frame 21, and an extended seedling tray T 1 for loading a seedling tray through a connecting member 23 on the outer side of the seedling frame frame 21. Is provided.

  A pair of front and rear rotation stays 21b and 21b for folding and supporting the preliminary seedling stand T is provided on the left and right sides (inner side of the machine body) of the seedling frame 21 and the preliminary seedling stage T is positioned outside the machine body. It is possible to switch between the position and the storage state in which the spare seedling stand T is located on the traveling vehicle body.

  Further, the side seedling receiving portion 21a on the left and right other side (outside the machine body) of the seedling frame frame 21 is provided with a regulation pin 21c that protrudes toward the inside of the machine body, and the seedling receiving plate 22 that supports the bottom of the seedling tray is provided. The movement of the loaded seedling tray is regulated by the regulation pin 21c. A pot portion (see FIG. 8) for receiving a plurality of seedlings is formed on the seedling tray, and a space portion is formed between the front and rear and between the left and right of the pot portions on the back surface. By inserting the restriction pin 21c into the space in the left-right direction, the movement of the seedling tray is restricted, and the seedling tray is prevented from falling due to vibrations of the body or changes in posture.

  This eliminates the need to pick up the seedling tray, improves the work efficiency, prevents the seedling from falling off the seedling tray, and prevents the seedling planting apparatus P from supporting the seedling planting. The

  Thus, by providing the extended seedling stand T1 stably via the connecting members 23, 23 at the two front and rear sides of the rectangular frame-shaped seedling frame frame 21 provided on the side edge of the machine body, Since the loading capacity can be increased, the field work can be efficiently advanced.

  A side seedling receiving portion 21a with a tray stopper is formed at the outer end portion of the preliminary seedling stand T by projecting the seedling frame frame 21 higher than the receiving surface 22a of the seedling receiving plate 22 that receives the tray bottom, and the connecting member 23 is A lower mounting member 23a, 23a provided integrally at the inner end of the extension seedling bed T1, and an upper mounting member 23c fixed integrally by a fastening member 23b with a seedling frame 21 sandwiched between the lower mounting member 23a. The protective member 23d that secures a tightening limit between the upper mounting member 23c and the lower mounting member 23a.

  Thus, by mounting the extension seedling stand T1 on the lower part of the seedling frame frame 21 of the spare seedling stand T, the loading efficiency of the seedling tray of the spare seedling stand T is ensured without interference with the side seedling receiving portion 21a. can do.

  Further, by sandwiching the seedling frame frame 21 between the upper mounting member 23c and the lower mounting member 23a, it can be integrally fixed by the fastening member 23b without requiring special processing of the seedling frame frame 21 of the basic configuration, Furthermore, by providing the protective member 23d between the upper mounting member 23c and the lower mounting member 23a, an appropriate fastening operation of the fastening member 23b can be performed.

  As shown in FIG. 8, the extended seedling stand T <b> 1 is configured by a rectangular frame-shaped extended seedling frame frame 24 and an auxiliary seedling receiving plate 25 that receives a seedling tray in the extended seedling frame frame 24. Then, by forming the upper end of the fastening member 23b below the height of the receiving surface 22a of the seedling receiving plate 22 of the preliminary seedling stand T, the fastening member 23b can be stably put in and out without being caught by the seedling tray. can do.

  Since the extension seedling frame 24 has the same shape as the seedling frame 21, the extension seedling stand T 1 can be further attached to the side of the extension seedling frame 24. In addition, the number of extension seedling stands T1 can be changed to reduce the number of seedling tray replenishment operations.

  As shown in FIG. 9, an exploded perspective view of the mounting configuration of the extension seedling stand T1 is provided with a rotation support portion 26 between the inner end portion and the lower mounting member 23a in the front and rear directions, and travels through the extension seedling stand T1. By pivoting on the vehicle body side so as to be able to be flipped up, it is possible to move quickly by opening and closing the extended seedling stand T1 during transportation and storage.

  In addition, at the outer end portion of the extended seedling frame frame 24, an auxiliary regulating pin that contacts the back side of the seedling tray placed on the auxiliary seedling receiving plate 25 and regulates the movement of the seedling tray in the same manner as the regulating pin 21c. 24a is provided so as to protrude toward the inside of the aircraft. Since the movement of the seedling tray is regulated by the auxiliary regulating pin 24a, the seedling tray is prevented from falling due to the vibration of the body or the change of the posture.

  This eliminates the need to pick up the seedling tray, improves the work efficiency, prevents the seedling from falling off the seedling tray, and prevents the seedling planting apparatus P from supporting the seedling planting. The

(Front wheel slide mechanism)
Next, as shown in FIG. 10 which is the operation diagram of the front wheel slide portion 31, the slide base hexagonal tube 32 has a two-stage pinning structure and is assembled to the necessary side on the short side and the long side of the tread. By this, it can respond to the planting width exceeding the body structure width.

The base hexagonal tube 32 can be used as a standard for stepless adjustment by cutting a groove corresponding to the interval (for example, in units of 25 mm). The tread adjustment range in the illustrated example is 230 to 630 mm on the LH side and 430 to 930 mm on the RH side.
In the case of two-row planting, reciprocal planting is possible without changing the tread by configuring the LH side to be short and the RH side to be long.

The slide base is configured so as to be aligned with the shaft end surface when assembled on the inner side, and the right side is configured to reach the tire outer surface.
By providing a reinforcing hub 33 that receives a load at an intermediate position of the shaft portion on the long side (RH) of the front wheel slide, the indication of the inner limit point can also be used.

  The front wheel arm 34 that holds the front wheel 36 is configured such that the front wheel 36 can be mounted from either the left or right side of the front wheel arm 34. The base of the front wheel arm 34 is detachably attached to the slide base via bolts 35. When the front wheel 36 is configured to be inserted by inserting the axle 36a into the front wheel arm 34, the front wheel arm 34 can be removed by removing the bolts 35, and the front wheel arm 34 can be reversed 180 degrees and attached to the slide base. It is possible to switch between a form in which the front wheel 36 is located on the inner side of the body relative to the front wheel arm 34 and a form located on the outer side of the body than the front wheel arm 34.

  With the above-described configuration, the position of the front wheel 36 in the left-right direction can be changed by changing the mounting position of the slide base or the direction in which the front wheel arm 34 is mounted, and the left and right front wheels 36, 36 can be finely adjusted. Therefore, the front wheels 36 and 36 are arranged at appropriate positions with respect to the number of seedlings to be planted and the size of the seedlings, and the running posture and the seedling planting posture are stabilized.

  Moreover, since it can prevent that the front wheels 36 and 36 approach too close to the position which plans to plant a seedling, a field scene will be destroyed and the planting depth and planting posture of a seedling will be prevented, and the growth of a seedling will be stabilized.

(Technical points)
The technical points of the seedling transplanter configured as described above are summarized as follows.
The leveling device 4 includes a leveling roller 11 for leveling the unevenness of the surface at the front part of the machine body, a rotating arm 12 pivotally supported on a rotating shaft 13 so that the support height of the leveling roller 11 can be changed, And a fixed plate 14 for fixing the moving arm 12, and the fixed plate 14 can be fixed and released by the rotation shaft 13, so that the leveling roller 11 is provided by the leveling device 4 provided on the front side of the traveling vehicle body. Since the seedling can be planted after leveling the uneven surface of the ridge, the planting depth of the seedling is stabilized and the growth of the seedling is improved, and the rotating arm 12 connects the fixed plate 14. Since the support height of the leveling roller 11 can be switched by releasing with the rotating shaft 13, the number of parts can be reduced and the weight can be reduced.

Further, a plurality of selection holes 12e for switching the support height are formed in the rotation arm 12, a connection hole 14a is formed in the fixed plate 14, and the rotation shaft 13 has operating grips 13c, 13d, one of the selection holes 12e, and a connection protrusion 13a formed so as to be able to be inserted into the connection hole 14a. The connection protrusion 13a is configured to be slidable in the vehicle width direction, and the connection protrusion 13a is biased toward the connection side. By providing the biasing member 13b, the rotation arm 12 is positioned at the selected position by inserting and connecting the connection protrusion 13a to the plurality of selection holes 12e of the rotation arm 12 and the connection hole 14a of the fixed plate 14. By providing grips 13c and 13d on both the left and right sides of the moving shaft 13, the operator pushes and pulls the rotating shaft 13 on either the left or right side of the machine body to connect the rotating arm 12 and the fixed plate 14. It is possible to switch the removal, excess movement is not required, reduction of labor improved and worker working efficiency can be improved.
Further, by urging the rotation shaft 13 to the connection side by the urging member 13b, it is possible to prevent the connection state from being released due to a load during work, so that the support height of the leveling device 4 does not change. The unevenness of the farm scene can be leveled reliably.

  Further, at the tip of the rotating arm 12, left and right roller arms 11a and 11a that pivotally support the leveling roller 11, and left and right roller suspension stays 16b and 16b that support the left and right roller arms 11a and 11a are suspended. The link arm 15 is provided to control the posture of the roller suspension stays 16b and 16b so that the leveling roller 11 can be moved rearward as the rotating arm 12 is lifted. The roller arms 11a and 11a are attached downward. By providing the springs 17a, 17a to be energized on the roller suspension stays 16b, 16b, the rotating arm 12 and the link arm 15 form an unequal four-sided link capable of controlling the posture of the roller suspension stays 16b, 16b. When the leveling roller 11 is sometimes turned to the traveling vehicle body side, the link arm 15 and the roller suspension stays 16b, 16b are seen in side view. With each other becomes, can roller arm 11a, 11a thereof is positioned on the vehicle body side from the front end of the leveling rollers 11, keep the front protrusion amount of ground leveling device 4.

  The spare seedling stand T is composed of a rectangular frame-shaped seedling frame frame 21 provided at a side edge of the traveling vehicle body, and a seedling receiving plate 22 that receives a seedling tray in the seedling frame frame 21. Since the seedling tray loading amount can be increased by providing an extended seedling tray T1 for seedling tray loading via the connecting member 23 on the outer side of the container, the time during which the operation is interrupted by the replenishment operation of the seedling tray is suppressed. Work efficiency is improved. Further, since the number of times the worker goes to take the seedling tray can be suppressed, the labor of the worker is reduced.

In addition, a side seedling receiving portion 21a is formed by protruding the seedling frame 21 higher than the receiving surface 22a of the seedling receiving plate 22 at the outer end portion of the preliminary seedling stand T, and the connecting member 23 is provided on the inner side of the extended seedling stand T1. A lower mounting member 23a provided integrally at the end, an upper mounting member 23c that is integrally fixed by a fastening member 23b with the seedling frame 21 sandwiched between the lower mounting member 23a, the upper mounting member 23c, and the lower mounting member By providing a protective member 23d that secures the tightening limit between 23a, the extended seedling base T1 is attached to the lower part of the seedling frame frame 21 of the spare seedling stage T, and interferes with the side seedling receiving portion 21a. Therefore, the loading range of the seedling tray of the preliminary seedling stand T is prevented from being blocked.
In addition, the protective member 23d provided between the upper mounting member 23c and the lower mounting member 23a can prevent the seedling frame frame 21 from being deformed due to the tightening of the fastening member 23b, thereby disturbing the stacking posture of the seedling tray. Is prevented, and the seedling tray is prevented from falling.

  The extension seedling stand T1 includes a rectangular frame-shaped extension seedling frame frame 24 and an auxiliary seedling receiving plate 25 that receives a seedling tray in the extended seedling frame frame 24, and the upper end portion of the fastening member 23b is a spare seedling stand. By forming it below the height of the receiving surface 22a of the T seedling receiving plate 22, it is possible to prevent the fastening member 23b from being caught on the seedling tray, making it difficult to remove the seedling tray and reducing the work efficiency. It is prevented that it becomes damaged and cannot be used for planting work.

  Moreover, since the extended seedling frame 24 has the same shape as the seedling frame frame 21, the extended seedling frame T1 can be attached to the side of the extended seedling frame frame 24. The number of extension seedling stands T1 can be changed in accordance with the number, and the number of seedling tray replenishment operations can be reduced.

  In addition, a rotation support portion 26 is provided between the extended seedling base T1 and the lower mounting member 23a, and the extended seedling base T1 is pivotally supported so as to be able to be flipped up to the traveling vehicle body side, so that the extended seedling base can be transported or stored. Since the work of removing T1 becomes unnecessary, the work efficiency is improved and the labor of the operator is reduced.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 4 Leveling device 11 Leveling roller 11a Roller arm 12 Rotating arm 12e Selection hole 13 Rotating shaft 13a Connection protrusion 13b Energizing member 13c Grip 13d Grip 14 Fixing plate 14a Connection hole 15 Link arm 16b Suspension stay 17a Spring P Seedling planting device T Spare seedling stand

Claims (3)

A seedling planting device (P) for planting seedlings in a seedling tray in a field, a leveling device (4) for leveling irregularities on the surface on which the seedling planting device (P) plants seedlings, and the seedling planting In the seedling transplanting machine configured to be able to run in the field with a preliminary seedling stand (T) for loading a spare seedling tray to be replenished to the device (P),
The leveling device (4) includes a leveling roller (11) for leveling the unevenness of the surface at the front of the machine body, and a pivot shaft (13) that can change the support height of the leveling roller (11). The rotating arm (12) and a fixing plate (14) for fixing the rotating arm (12) are provided, and the fixing plate (14) can be fixed and released by the rotating shaft (13). A seedling transplanter characterized by comprising.   A plurality of selection holes (12e) for switching the support height are formed in the rotating arm (12), a connecting hole (14a) is formed in the fixing plate (14), and the rotating shaft (13) An operation grip (13c, 13d) formed on both side ends, a connecting projection (13a) formed so as to be able to be inserted into any one of the selection hole (12e) and the connection hole (14a), and in the vehicle width direction The seedling transplanting machine according to claim 1, further comprising a biasing member (13b) configured to be slidable and to bias the coupling protrusion (13a) toward the coupling side.   The left and right roller arms (11a, 11a) that pivotally support the leveling roller (11) and the left and right roller arms (11a, 11a) are suspended and supported at the tip of the rotating arm (12). The roller suspension stays (16b, 16b) of the roller suspension stays (16b, 16b) are supported so that the leveling roller (11) can move rearward as the rotating arm (12) is lifted. A link arm (15) for controlling the posture is provided, and a spring (17a) for biasing the roller arm (11a, 11a) downward is provided on the roller suspension stay (16b, 16b). The seedling transplanter according to claim 1 or 2.