JP2023092312A - Spare seedling table - Google Patents

Abstract

To improve strength in a spare seedling table.SOLUTION: A spare seedling table includes: one frame 21; the other frame 21; and a seedling placing part 31 fitted to the one and the other frames 21 and mounting and supporting seedlings. The one and the other frames 21 have: flat plate parts 28 which are flat along a vertical direction in a cross-sectional view and are extended along a longitudinal direction of the seedling placing part 31 in a lateral view; and hollow parts 29 which are hollow, are wider than the flat plate parts 28, are connected to the flat plate part 28, and extended along a longitudinal of the seedling placing part 31 in the lateral view. The seedling placing 31 is fitted to the one and the other flat plate parts 28.SELECTED DRAWING: Figure 9

Description

TECHNICAL FIELD The present invention relates to a spare seedling loading stand to be equipped on a riding rice transplanter or a walking rice transplanter.

Patent Literature 1 discloses a spare seedling tray mounted on a riding rice transplanter. In the preliminary seedling placing table of Patent Document 1, the right vertical wall portion, the left vertical wall portion, and the entire seedling mounting portion provided between the right and left vertical wall portions are integrally formed of synthetic resin. It is

JP 2011-62159 A

In recent years, there has been an increasing demand for placing a large number of seedlings on a spare seedling placement table, and there is an increasing need to improve the strength of the portions corresponding to the right and left vertical walls of the spare seedling placement table.
An object of the present invention is to improve the strength of the stand for placing preliminary seedlings.

The preliminary seedling placement table of the present invention includes one frame, the other frame, and a seedling placement section attached across the one and the other frames and on which seedlings are placed and supported. and the other frame has a flat plate shape extending in the vertical direction when viewed in cross section, a flat plate portion extending along the longitudinal direction of the seedling placement portion when viewed sideways, and a flat plate portion which is larger than the flat plate portion when viewed in cross section. a hollow portion having a lateral width, connected to the flat plate portion, and extending along the longitudinal direction of the seedling placement portion in a side view; It is attached across the other flat plate portion.

According to the present invention, the one frame and the other frame to which the seedling placement part is attached are composed of a flat flat plate portion along the vertical direction in cross section and a hollow flat plate portion having a width larger than that of the flat plate portion in cross section. and a hollow portion connected to the portion. As a result, the flat plate portion and the hollow portion of the frame ensure the strength of the frame in the vertical direction, and the hollow portion of the frame ensures the strength of the frame in the horizontal direction.

When the seedling mounting part is attached to the one frame and the other frame, the seedling mounting part can be easily attached to the flat plate part of the frame compared to the hollow part of the frame. can be easily installed.
Thus, according to the present invention, by providing the frame with the flat plate portion and the hollow portion, it is possible to easily attach the seedling placement portion to the frame and to obtain the preliminary seedling placement table in which the strength of the frame is ensured.

In the present invention, when viewed in cross section, the hollow portion is connected to the upper and lower portions of the flat plate portion, and the portion of the hollow portion facing the central portion of the seedling placing portion is linear in the vertical direction when viewed in cross section. and a portion of the hollow portion on the side opposite to the central portion of the seedling mounting portion is formed in an arc shape projecting toward the side opposite to the central portion of the seedling mounting portion in a cross-sectional view. It is preferable to have

According to the present invention, in the frame, the upper hollow portion is connected to the upper portion of the flat plate portion, and the lower hollow portion is connected to the lower portion of the flat plate portion, thereby improving the strength of the frame of the preliminary seedling rest. can.

When the seedling is placed on the seedling placement part, the part of the hollow part of the frame that faces the center of the seedling placement part often comes into contact with the seedling on the seedling placement part.
According to the present invention, since the portion of the hollow portion of the frame facing the central portion of the seedling mounting portion is straight in the vertical direction in a cross-sectional view, the seedlings placed on the seedling mounting portion are placed on the preliminary seedlings. When the stand is moved along the longitudinal direction, the seedlings placed on the seedling placement part are smoothly guided by the part of the hollow part of the frame that faces the central part of the seedling placement part.
According to the present invention, the portion of the hollow portion of the frame opposite to the central portion of the seedling mounting portion is formed in an arc shape projecting toward the side opposite to the central portion of the seedling mounting portion in a cross-sectional view. Therefore, the strength of the frame is ensured.

In the present invention, the seedling placement section is mounted across one and the other flat plate sections so as to be rotatable around an axis orthogonal to the longitudinal direction of the frame, and arranged side by side along the longitudinal direction of the frame. It is preferred that the support rollers are aligned.

According to the present invention, when the seedlings placed on the support rollers are moved along the longitudinal direction of the preliminary seedling tray, the seedlings are smoothly moved by rotating the support rollers.
According to the present invention, for example, when a mat-like seedling is rolled into a roll and placed on a preliminary seedling mount, the roll-like seedling can be placed, for example, so as to be dropped between adjacent support rollers. Therefore, the roll-shaped seedling can be stably placed on the preliminary seedling placing table.

In the present invention, a support shaft on which the support roller is rotatably supported, and a bearing portion attached to one and the other of the flat plate portions and supporting one portion and the other portion of the support shaft are provided, and the bearing a mounting portion that is inserted into an opening formed in the flat plate portion; It is preferable to have an engaging portion that prevents the device from coming off.

According to the present invention, when the support shaft that supports the support roller and the bearing portion that supports the support shaft are provided, when the mounting portion of the bearing portion is inserted into the opening formed in the flat plate portion of the frame, the bearing portion is engaged with the edge of the opening of the frame, and the bearing is attached to the flat plate portion of the frame.
According to the present invention, the bearing portion can be easily attached to the flat plate portion of the frame as described above, so that the ease of assembly of the preliminary seedling placement table can be improved.

In the present invention, it is preferable that rotation of the bearing portion around the axis is prevented by contacting the bearing portion attached to the flat plate portion with the hollow portion.

According to the present invention, by attaching the bearing to the flat plate portion (opening) of the frame as described above, the bearing comes into contact with the hollow portion of the frame to prevent rotation of the bearing. The hollow portion can also be used as the anti-rotation portion of the bearing portion, which is advantageous in terms of structural simplification.

According to the present invention, since the flat plate portion and the hollow portion are connected in the frame, when the bearing portion is attached to the flat plate portion (opening) of the frame as described above, the bearing portion is in a state close to the hollow portion of the frame. Therefore, it is possible to easily prevent rotation of the bearing portion by the hollow portion of the frame.

In the present invention, a shaft insertion portion that supports the support shaft by inserting the support shaft is provided in the bearing portion, and a detent portion that stops rotation of the support shaft around the axis is provided on the shaft. It is preferable that it is provided in the insertion section.

According to the present invention, the support shaft is supported by the bearing portion by inserting the support shaft into the shaft insertion portion of the bearing portion. provided in the department. As a result, the shaft insertion portion of the bearing portion has the function of supporting the support shaft and the function of preventing rotation, which is advantageous in terms of structural simplification.

In the present invention, it is preferable that the anti-rotation portion is a flat plate-shaped groove into which a flat plate-shaped portion at the end of the support shaft is inserted.

According to the present invention, the support shaft is prevented from turning by inserting the flat plate-shaped portion at the end of the support shaft into the groove (rotation prevention portion) of the bearing portion (shaft insertion portion). Since the anti-rotation portion of the bearing portion (shaft insertion portion) is simply configured by the groove portion, it is advantageous in terms of structural simplification.

In the present invention, it is preferable that the shaft insertion portion is provided with a positioning portion that determines the position of the support shaft in the axial direction by contacting the end portion of the support shaft.

According to the present invention, the support shaft is supported by the bearing portion by inserting the support shaft into the shaft insertion portion of the bearing portion. It is provided in the shaft insertion part. As a result, the shaft insertion portion of the bearing portion has the function of supporting the support shaft and the function of positioning the support shaft, which is advantageous in terms of structural simplification.

In the present invention, a bearing attached to the outer surface of the support shaft and a bearing holder that is divided into two and attached to the outer surface of the bearing are provided, and the support roller is a cylinder with one end and the other end open. The bearing is attached to the outer surface of the support shaft, the bearing holder is attached to the outer surface of the bearing, and the bearing holder is press-fitted to the end of the support roller, whereby the support is It is preferable that the roller is rotatably supported by the support shaft via the bearing and the bearing holder.

According to the present invention, with the bearing attached to the support shaft, the bearing holder is attached to the outer surface of the bearing, and the bearing holder is press-fitted to the end of the support roller, whereby the support roller is supported via the bearing and the bearing holder. It is rotatably supported on the shaft.
According to the present invention, the bearing holder is divided into two pieces, and the two pieces of the bearing holder can be easily attached to the outer surface of the bearing from the outside of the bearing. be able to.

In the present invention, when the bearing holder is press-fitted into the end portion of the support roller, a convex portion is pressed against the inner surface of the end portion of the support roller to reinforce the attachment of the bearing holder to the support roller. , the protrusion is provided on the outer surface of the bearing holder, and the convex portion is separated from the end of the bearing holder on the side opposite to the insertion side into the support roller by a predetermined length toward the insertion side into the support roller. portion toward the end of the bearing holder on the side of insertion into the support roller.

According to the present invention, since the convex portion is formed on the outer surface of the bearing holder, when the bearing holder is press-fitted to the end portion of the support roller as described above, the convex portion of the bearing holder is strongly pressed against the inner surface of the support roller. The bearing holder is firmly attached to the support roller.

As aforementioned. When a bearing holder with a protrusion formed on its outer surface is press-fitted into the end of the support roller, the protrusion of the bearing holder may be scraped off by the end of the support roller, generating shavings. Shavings may come out of the support roller when completing press-fitting to the end of the support roller.

According to the present invention, on the outer surface of the bearing holder, the protrusion is not provided over the entire width of the bearing holder, but from the end of the bearing holder opposite to the side of insertion into the support roller. A convex portion is provided from a portion a predetermined length away from the bearing holder, and there is a portion where no convex portion is provided near the end of the bearing holder on the side opposite to the side where the bearing holder is inserted into the support roller. .

According to the present invention, as the bearing holder is press-fitted into the end of the support roller, the end of the support roller scrapes the convex portion of the bearing holder, and if shavings are generated, the support roller of the bearing holder is removed. Shortly before the press-fitting to the end of the bearing holder is completed, the convex portion of the bearing holder disappears, and shavings are less likely to occur.
After that, even if the bearing holder is further press-fitted to the end of the support roller, shavings are less likely to be generated. This is advantageous in terms of improving the ease of assembly of the support rollers and the support shaft.

It is a left side view of a riding rice transplanter. It is a top view of a riding rice transplanter. It is a left side view near a support frame and a 1st, 2nd, and 3rd preliminary seedling mounting stand. It is a left side view of the 1st, 2nd, and 3rd preliminary seedling mounting stand. Fig. 2 is a plan view of a first preliminary seedling placing table; It is a left side view of a 1st preliminary seedling mounting stand. It is a perspective view of the frame of a preliminary seedling stand. It is a left side view near the frame of a support frame and a 1st preliminary seedling rest. It is an exploded perspective view of the support roller of a preliminary seedling stand, one bearing part, and a frame. It is a longitudinal front view of the vicinity of the supporting rollers, one bearing portion, and frame of the preliminary seedling placing table. It is a cross-sectional plan view near the support roller of a preliminary seedling stand, one bearing part, and a frame. It is a longitudinal front view near the support roller of a preliminary seedling stand, the other bearing part, and a flame|frame. It is a top view of a 2nd preliminary seedling mounting stand. It is a longitudinal side view of a 2nd preliminary seedling mounting stand. It is a top view of a 3rd preliminary seedling mounting stand. It is a left side view of a 3rd preliminary seedling mounting stand. It is a perspective view of the vicinity of the rear part of the left 3rd preliminary seedling rest (working posture) and the left front part of a step. It is a vertical cross-sectional side view of the vicinity of the rear portion of the right third preliminary seedling loading table (working posture) and the right front portion of the step. FIG. 11 is a left side view of the first, second, and third preliminary seedling placing stands in the first alternative embodiment of the invention; FIG. 20 is a left side view of the first, second, and third preliminary seedling stands in the sixth alternative embodiment of the invention; FIG. 20 is a left side view of the first, second, and third preliminary seedling stands in the sixth alternative embodiment of the invention; FIG. 20 is a left side view of the first, second, and third preliminary seedling stands in the sixth alternative embodiment of the invention; FIG. 20 is a left side view of the third preliminary seedling placing table in the seventh alternative embodiment of the invention. In the tenth alternative embodiment of the invention, it is a left side view of the first, second and third preliminary seedling placing stands.

1 to 24 show a ride-on rice transplanter equipped with a spare seedling platform, in which F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, D indicates downward, R indicates rightward, and L indicates leftward.

(Overall configuration of riding rice transplanter)
As shown in FIGS. 1 and 2, a machine body 3 is supported by right and left front wheels 1 and right and left rear wheels 2, and a seedling planting device 4 for planting seedlings on the field surface can be operated up and down. It is supported at the rear part of the body 3.

A floor 5 is provided in the body 3, a step 6 is provided in the rear part of the body 3 so as to be arranged at a position higher than the floor 5, and a driver's seat 7 is provided in the front part of the step 6. - 特許庁A fertilizing device 8 for supplying fertilizer to the paddy field is provided behind the step 6 so as to be arranged at a position higher than the step 6.例文帳に追加

A bonnet 9 that accommodates an engine (not shown) is provided in front of the driver's seat 7 and in the center of the front portion of the floor 5 in the left-right direction. is located at the rear of the Right and left handrail frames 14 are connected to the fuselage 3 and extend upward through the right laterally outward and left laterally outward sides of the steps 6 . A frame 15 is connected along the left-right direction across the right and left frames 14 .

(Construction of support frame for supporting spare seedling tray)
As shown in FIGS. 1 and 2, right and left support frames 17 are connected to the right and left portions of the forward lower portion of the fuselage 3 and extend laterally outward of the right forward portion and left forward laterally of the floor 5 . is extended upwards. A support frame 20 is connected along the left-right direction over the upper portions of the right and left support frames 17 .

The right and left support frames 16 are connected to the right and left parts of the front lower part of the fuselage 3 and extend upward laterally outward of the right front part and laterally outward of the left front part of the floor 5 . The upper part of the support frame 16 is connected to the upper part of the support frame 17 . Right and left support frames 18 and 19 are connected to the right and left parts of the front lower part of the fuselage 3 and extend laterally outward of the right front part and laterally outward of the left front part of the floor 5 upward. It is

Forward illuminating right and left lights 27 are mounted on the support frame 16 . Right and left spare seedling stands 24 on which one mat-like seedling can be placed are attached to the upper portions of the support frames 16 and 17 . As described above, the support frames 16 to 20 are provided in the front part of the airframe 3. As shown in FIG.

As shown in FIGS. 1 to 4, the right and left first preliminary seedling trays 11, the right and left second preliminary seedling trays 12, the right and left A spare seedling placing stand 13 is provided as a third spare seedling placing stand on the left.

As described later in (Overall Configuration of First Preliminary Seedling Placement), the preliminary seedling placement stand 11 is supported by support frames 16-20.
As described later in (Construction for supporting the second spare seedling mount) and (Construction for supporting the third preliminary seedling mount), the spare seedling mount 12 is supported via the spare seedling mount 11. It is supported by frames 16-20, and a preliminary seedling mount 13 is supported by the support frames 16-20 via a preliminary seedling mount 11. - 特許庁

(Overall Configuration of First Spare Seedling Placement)
As shown in FIGS. 5 and 6, the spare seedling placement table 11 includes a right frame 21 as one frame, a left frame 21 as the other frame, and a plurality of support rollers 31 as a seedling placement portion. , right and left first fulcrum portions 41 , right and left fulcrum portions 43 , right and left first contact portions 51 , first lateral frame 61 and lateral frame 63 .

The right and left first fulcrum portions 41 are connected to the front end portion, which is the end portion of the frame 21 in the front-rear direction, and the right and left first contact portions 51 are connected to the first fulcrum portion 41, The first contact portion 51 is connected to the front end portion of the frame 21 via the first fulcrum portion 41 . The first horizontal frame 61 is connected across the right and left first fulcrum portions 41 , and the first horizontal frame 61 is attached to the front end portions of the right and left frames 21 via the first fulcrum portions 41 in the horizontal direction. connected along.

The right and left fulcrum portions 43 are connected to the rear end portion, which is the end portion in the front-rear direction, of the frame 21 , and the horizontal frame 63 is connected across the right and left fulcrum portions 43 . It is connected to the rear end portions of the right and left frames 21 via fulcrum portions 43 along the left-right direction. The right and left frames 21, the first horizontal frame 61, and the horizontal frame 63 ensure the overall rigidity of the preliminary seedling placement table 11. As shown in FIG.

A plurality of support rollers 31 are supported across the right frame 21 and the left frame 21 so as to be rotatable around an axis P1 along the left-right direction perpendicular to the longitudinal direction of the frame 21 .

The support rollers 31 are arranged side by side in the front-rear direction, and the right frame 21 and the left frame 21 are spaced apart from each other in the front-rear direction so that a gap C1 is formed between the adjacent support rollers 31 . supported by A length (interval) L1 in the front-rear direction of the gap C1 that is the interval between the adjacent support rollers 31 is set to be larger than the outer diameter D1 of the support rollers 31 .

In the right and left spare seedling placing stands 11 configured as described above, in the right spare seedling placing stand 11, the right frame 21 is supported above the support frames 18 and 19, and the left frame 21 is the support frame. 16 and 17. In the left spare seedling placement table 11, the right frame 21 is supported by the support frames 16 and 17, and the left frame 21 is supported above the support frames 18 and 19. As shown in FIG. As a result, the preliminary seedling mount 11 is supported by the support frames 16-20.

As shown in FIG. 4, the mat-like seedling E is rolled into a roll and fastened with a string or band, and the roll-like seedling E is placed between the adjacent supporting rollers 31, 32, 33 in the gaps C1, C2, It can be placed so as to drop into C3. The roll-shaped seedlings E can be stacked between the roll-shaped seedlings E placed on the support rollers 31 , 32 , 33 . As a result, the roll-shaped seedling E is positioned by the right and left frames 21, 22, 23 and the support rollers 31, 32, 33 adjacent to each other in the front and rear, and is stably placed on the preliminary seedling placement table 11 without rolling. , 12, 13.

(Composition of the frame in the first spare seedling loading table)
As shown in FIGS. 7 to 10, the frame 21 is made of aluminum and has a flat plate portion 28 and a hollow portion 29 .

The flat plate portion 28 has a flat plate shape along the vertical direction when viewed in cross section, and extends along the front-rear direction, which is the longitudinal direction of the frame 21 (seedling placement portion) when viewed from the side. The flat plate portion 28 is provided with an opening portion 28a for mounting the support roller 31 and an elongated hole 28b along the front-rear direction as a position adjusting portion.

When the frame 21 is attached to the support frames 16 to 19 as described above (overall configuration of the first preliminary seedling placement table), the bolts 30 (see FIGS. 3 and 8) are inserted into the long holes of the flat plate portion 28. The flat plate portion 28 is attached to the support frames 16 to 19 through the 28b. As a result, the mounting position of the preliminary seedling mount 11 on the support frames 16 to 19 can be adjusted in the longitudinal direction by the elongated hole 28b of the flat plate portion 28. As shown in FIG.

The hollow portion 29 is hollow having a width larger than that of the flat plate portion 28 when viewed in cross section, and is connected to the upper and lower portions of the flat plate portion 28. It extends along a certain front-rear direction.

A portion 29a of the hollow portion 29 facing the central portion of the support roller 31 (seedling placing portion) is formed in a straight line along the vertical direction in a cross-sectional view. A portion 29b of the hollow portion 29 opposite to the central portion of the support roller 31 (seedling placement portion) projects toward the side opposite to the central portion of the support roller 31 (seedling placement portion) in a cross-sectional view. It is formed in an arc shape, and the hollow portion 29 is formed in the shape of a quarter circle when viewed in cross section.

With the above configuration, the frame 21 has a vertically symmetrical shape, and the right and left frames 21 are the same. The right and left frames 21 are arranged such that the portions 29a of the hollow portions 29 of the right and left frames 21 face each other (to face the central portion of the support roller 31).

(Construction of support rollers in the first preliminary seedling placement table)
As shown in FIGS. 9 to 12, the support roller 31 is made of aluminum and has a cylindrical shape, and one end and the other end are open. A support shaft 34 for supporting the support roller 31, right and left bearings 35, and right and left bearing holders 36 are provided.

The support shaft 34 is composed of a round pipe. A flat portion 34a is formed at one end of the support shaft 34, and the other end 34b of the support shaft 34 is cylindrical. A bearing 35 is attached to the outer surface of the support shaft 34 from the end 34 b of the support shaft 34 .

The bearing holder 36 is made of synthetic resin and is divided into two parts in a semi-ring shape. and a flange portion 36c provided on the portion.

In the bearing holder 36, a predetermined length extends from the flange portion 36c, which is the end portion of the bearing holder 36 opposite to the insertion side into the support roller 31, toward the opposite side of the flange portion 36c, which is the insertion side into the support roller 31. The ends of the projections 36b are positioned at a distance of .

In the bearing holder 36 , the projection 36 b is formed from the above-described portion toward the end of the bearing holder 36 on the insertion side of the support roller 31 . Accordingly, on the outer surface of the holder portion 36a of the bearing holder 36, there is a portion 36d where the convex portion 36b is not provided between the convex portion 36b and the flange portion 36c.

With the above configuration, the holder portion 36 a of the two-part bearing holder 36 is attached to the outer surface of the bearing 35 , and the bearing holder 36 is press-fitted to the end portion of the support roller 31 . As the bearing holder 36 is pressed into the end of the support roller 31 , the projection 36 b of the bearing holder is scraped by the end of the support roller 31 and strongly pressed against the inner surface of the support roller 31 .

Before the flange portion 36c of the bearing holder 36 reaches the end of the support roller 31 (slightly before the bearing holder 36 is completely press-fitted into the end of the support roller 31), the convex portion 36b of the bearing holder 36 is provided. Since the portion 36d where there is no surface reaches the end portion of the support roller 31, shavings are less likely to occur.

When the flange portion 36c of the bearing holder 36 reaches the end of the support roller 31, the press-fitting of the bearing holder 36 to the end of the support roller 31 is completed. Thereby, the support roller 31 is rotatably supported by the support shaft 34 via the bearing 35 and the bearing holder 36 .

(Construction of support of support rollers in the first preliminary seedling placement table)
In the support roller 31 and the support shaft 34 configured as described in (Configuration of the support roller in the first preliminary seedling placement table), as shown in FIGS. A bearing portion 37 is provided to support the other portion.

The bearing portion 37 is integrally formed of synthetic resin, and includes a body portion 37a, a mounting portion 37b, an engaging portion 37c, a shaft insertion portion 37d, a groove portion 37e as a detent portion, a positioning portion 37f, and the like. there is

In the bearing portion 37, a main body portion 37a is formed in a square shape (rectangular shape) when viewed from the side. The attachment portion 37b is formed in an octagonal shape (polygonal shape) in a side view, and is attached to the main body portion 37a. A pair of claw-like engaging portions 37c are attached to the body portion 37a so as to be positioned on both sides of the attaching portion 37b. A hole-shaped shaft insertion portion 37d is formed from the main body portion 37a to the attachment portion 37b, and a groove portion 37e and a positioning portion 37f are provided in the inner depth portion of the shaft insertion portion 37d.

In the frame 21 (the flat plate portion 28 and the hollow portion 29 ) and the bearing portion 37 , the mounting portion 37 b and the engaging portion 37 c of the bearing portion 37 are inserted into the opening portion 28 a of the flat plate portion 28 . When the mounting portion 37b and the engaging portion 37c of the bearing portion 37 are inserted into the opening portion 28a of the flat plate portion 28 until the body portion 37a of the bearing portion 37 contacts the flat plate portion 28, the engaging portion 37c of the bearing portion 37 is engaged. engages with the edge of the opening 28a of the flat plate portion 28, and the mounting portion 37b of the bearing portion 37 prevents the flat plate portion 28 from coming off from the opening 28a.

At the same time, the body portion 37a of the bearing portion 37 enters between the upper and lower hollow portions 29, the upper side portion of the body portion 37a of the bearing portion 37 contacts the lower side portion of the upper hollow portion 29, and the bearing is closed. A lower side portion of the body portion 37a of the portion 37 contacts the upper side portion of the hollow portion 29 below, thereby preventing rotation of the bearing portion 37 around the axis P1. Thereby, the bearing portion 37 is attached to the flat plate portion 28 of the frame 21 .

The flat plate-like portion 34a of the support shaft 34 is inserted into the shaft insertion portion 37d of the bearing portion 37 attached to one of the right and left frames 21, and is inserted into the groove portion 37e of the bearing portion 37, so that the bearing portion 37 is It hits the deep inner part of the groove part 37e. The end portion 34b of the support shaft 34 is inserted into the shaft insertion portion 37d of the bearing portion 37 attached to the other of the right and left frames 21 and brought into contact with the positioning portion 37f of the bearing portion 37. As shown in FIG.

As a result, one portion and the other portion of the support shaft 34 are supported by the bearing portion 37, and the support roller 31 is rotatably mounted on the right and left frames 21 around an axis P1 orthogonal to the longitudinal direction of the frame 21. 21 is attached across the flat plate portion 28 . The upper end of the support roller 31 is positioned below the upper ends of the right and left frames 21 , 21 .

The groove portion 37e of the bearing portion 37 prevents rotation of the support shaft 34 around the axis P1. The position of the support shaft 34 in the direction of the axis P1 is determined by the groove portion 37e of the bearing portion 37 on one side and the positioning portion 37f of the bearing portion 37 on the other side.

(Overall Configuration of Second Spare Seedling Placement)
As shown in FIGS. 13 and 14, the spare seedling placement table 12 includes a right frame 22 as one frame, a left frame 22 as the other frame, and a plurality of support rollers 32 as a seedling placement portion. , right and left second fulcrum portions 42 , right and left second contact portions 52 , front guide rollers 38 as front guide members, locking portions 39 , second horizontal frame 62 and horizontal frame 64 and

The right and left second fulcrum portions 42 are connected to the rear end portion, which is the end portion in the front-rear direction of the frame 22, and the right and left second contact portions 52 are connected to the second fulcrum portion 42, The second contact portion 52 is connected to the rear end portion of the frame 22 via the second fulcrum portion 42 . The second horizontal frame 62 is connected across the right and left second fulcrum portions 42 , and the second horizontal frame 62 is attached to the rear end portions of the right and left frames 22 via the second fulcrum portions 42 in the left-right direction. connected along.

The right and left support portions 44 are connected to the front end portion, which is the end portion in the front-rear direction, of the frame 22 , the horizontal frame 64 is connected across the right and left support portions 44 , and the horizontal frame 64 is connected to the right side. and the front end portion of the left frame 22 via a support portion 44 along the left-right direction. A locking portion 39 formed in a channel shape in plan view is connected to the front portion of one frame 22 . The right and left frames 22, the second horizontal frame 62, and the horizontal frame 64 ensure the overall rigidity of the preliminary seedling placement table 12. As shown in FIG.

In the spare seedling placing table 12, the frame 22 has a flat plate portion, similar to the frame 21 of the spare seedling placing table 11 (see the above-mentioned (first preliminary seedling placing table) and FIGS. 7 to 12). 28, with upper and lower hollows 29; In this case, the frame 22 does not have the long hole 28b of the flat plate portion 28 .

The preliminary seedling loading table 12 is provided with the same support rollers 32 as the supporting rollers 31 of the preliminary seedling loading table 11, and is similar to the configuration of the supporting rollers in the first preliminary seedling loading table (first preliminary seedling loading table). Structure of Supporting the Support Rollers in 3.). Similar to the spare seedling placement table 11, the support rollers 32 are rotatably mounted on the flat plate portions 28 of the right and left frames 22 around the axis P2 along the horizontal direction perpendicular to the longitudinal direction of the frame 22. mounted across.

(Configuration of front guide rollers in the second spare seedling placement table)
As shown in FIGS. 13 and 14, a front guide roller 38 having a length that spans the right and left frames 22 is an axial center extending in the left-right direction perpendicular to the longitudinal direction of the frame 22. It is supported over the upper portions of the right and left support portions 44 so as to be rotatable around an axis P4.

The front guide roller 38 is arranged at a position higher than the support roller 32 (seedling placement section), and is arranged at a position higher than the frame 22 (upper hollow section 29). provided in the department.

(Positional relationship between the front guide roller and the support roller in the second spare seedling placement table)
As shown in FIGS. 13 and 14, the support rollers 32 are arranged side by side in the front-rear direction, and a gap C2 is formed between the front guide roller 38 and the support rollers 32 and between the adjacent support rollers 32. are supported by the right frame 22 and the left frame 22 so as to be spaced apart from each other in the front-to-rear direction.

Of the plurality of support rollers 32, the first support roller 32(1) closest to the front guide roller 38 and the second support roller 32 (1) adjacent to the rear side of the first support roller 32(1) 2), the length (gap) L21 of the gap C2, which is the gap in the front-rear direction between the front guide roller 38 and the first support roller 32(1), is set to be sufficiently large.

A gap length (interval) L22, which is the longitudinal interval between the first support roller 32(1) and the second support roller 32(2), is set to be sufficiently small. Thereby, the length (interval) L22 is set to be smaller than the length (interval) L21.

Assuming an imaginary line K1 connecting the upper end of the front guide roller 38 and the upper end of the first support roller 32(1) in side view, the imaginary line K1 corresponds to the second support roller 32 ( 2) and positioned above the axis P2 of the second support roller 32(2) in a side view.

In the third support roller 32(3), the fourth support roller 32(4), and the fifth support roller 32(5), which are adjacent to the rear side of the second support roller 32(2), the There is a length (gap) L23 in the gap C2, which is the gap in the front-rear direction between the second support roller 32(2) and the third support roller 32(3). A space C2, which is the space between the third support roller 32(3) and the fourth support roller 32(4) in the front-rear direction, has a length (space) L24. A space C2, which is the space between the fourth support roller 32(4) and the fifth support roller 32(5) in the front-rear direction, has a length (space) L25.

The length (interval) L23 is set larger than the length (interval) L22, the length (interval) L24 is set larger than the length (interval) L23, and the length (interval) L24 is longer than the length (interval) L24. The length (interval) L25 is set to be large, and the lengths (intervals) L22, L23, L24, and L25 increase in order.

The length (interval) L21 is set larger than the lengths (intervals) L22, L23, L24 and L25, and the lengths (intervals) L21, L23, L24 and L25 are the outer diameters of the support rollers 32. It is set to something larger than D2. The length (interval) L22 is set to be substantially the same as the outer diameter D2 of the support roller 32 or slightly smaller than the outer diameter D2 of the support roller 32.

As a result, among the plurality of support rollers 32, the length of the gap C2 between the support rollers 32(3)(4)(5) other than the first support roller 32(1) and the second support roller 32(2) (Intervals) L23, L24, and L25 are set to be longer than the length (interval) L22 of the gap C2 between the first support roller 32(1) and the second support roller 32(2).

As described above (overall configuration of the first preliminary seedling loading table) and shown in FIG. C2), it can be placed so as to drop between adjacent support rollers 32 (gap C2).

(Structure related to supporting the second spare seedling placement table)
As shown in FIGS. 3 and 4, the first fulcrum portion 41 of the preliminary seedling loading table 11 and the second fulcrum portion 42 of the preliminary seedling loading table 12 are connected so as to be swingable, so that the preliminary seedling loading table 12 can It is swingably supported around a first support axis P11, which is a support axis along the left-right direction of the front part of the spare seedling placing table 11. As shown in FIG.

As a result, the front and rear ends of the right frame 21 and the left frame 21 of the first preliminary seedling loading table 11 and the front and rear ends of the right frame 22 and the left frame 22 of the second preliminary seedling loading table 12 are arranged. , are supported so as to be able to swing around a first support axis P11, which is a support axis along the left-right direction.

The preliminary seedling loading table 12 is swingably supported around the first support axis P11 in the front part of the preliminary seedling loading table 11, so that the preliminary seedling loading table 12 is connected to the preliminary seedling loading table 11. A working posture A11, which is a first working posture extending forward from the front portion of the seedling loading table 11, and a storage posture, which is a first storing posture in which the front portion of the spare seedling loading table 11 is folded upward. The attitude can be changed to the attitude A21.

In the state where the spare seedling loading table 12 is operated in the working posture A11, the first contacting portion 51 of the preliminary seedling loading table 11 and the second contacting portion 52 of the preliminary seedling loading table 12 are brought into contact with each other, whereby the preliminary seedling loading table is operated. 12 is set (maintained) in the working posture A11.

If the seedling E is not placed on the spare seedling loading table 12 which is operated to the working posture A11, the preliminary seedling loading table 12 is brought to the working posture A11 by the contact between the first contact portion 51 and the second contact portion 52. It is set (maintained). The first horizontal frame 61 (see FIG. 5) of the spare seedling platform 11 and the second horizontal frame 62 (see FIG. 13) of the spare seedling platform 12 are close to each other. A slight gap is generated between the two lateral frames 62 .

When the seedling E is placed on the preliminary seedling loading table 12 which is operated to the working posture A11 and the preliminary seedling loading table 12 is about to be displaced downward, the first horizontal frame 61 and the second horizontal frame 62 move in the left-right direction. It abuts along substantially the entire length. As a result, the contact between the first contact portion 51 and the second contact portion 52 and the contact between the first horizontal frame 61 and the second horizontal frame 62 stop the downward displacement of the preliminary seedling placement table 12. Thus, the spare seedling placement table 12 is set (maintained) in the working posture A11.

As shown in FIGS. 1 and 3 , the front holding portion 25 is provided in a portion of the support frame 16 protruding upward from the preliminary seedling loading table 11 and below the preliminary seedling loading table 24 .
By operating the spare seedling placing table 12 to the storing posture A21 and holding the engaging portion 39 of the spare seedling placing stand 12 in the front holding portion 25, the spare seedling placing stand 12 can be held in the storing posture A21. By releasing the holding of the front holding portion 25, the preliminary seedling placing table 12 can be operated to the working posture A11.

(Overall Configuration of Third Spare Seedling Placement)
As shown in FIGS. 15 and 16, the spare seedling placement table 13 includes a right frame 23 as one frame, a left frame 23 as the other frame, and a plurality of support rollers 33 as a seedling placement portion. , right and left fulcrum portions 45 , right and left engaging portions 46 , locking portion 40 , and lateral frames 65 and 66 .

The right and left fulcrum portions 45 are connected to the front end portion, which is the end portion of the frame 23 in the front-rear direction, the horizontal frame 65 is connected across the right and left fulcrum portions 45, and the horizontal frame 65 is connected to the right side. and the front end portion of the left frame 23 via a fulcrum portion 45 along the left-right direction.

The right and left engaging portions 46 are connected to the rear end portion, which is the end portion in the front-rear direction, of the frame 23, and the horizontal frame 66 is connected across the right and left engaging portions 46. 66 are connected to the rear ends of the right and left frames 23 via engaging portions 46 along the left-right direction. A locking portion 40 formed in a channel shape in plan view is connected to the rear portion of one frame 23 . The right and left frames 23, horizontal frames 65, and horizontal frames 66 ensure the overall rigidity of the preliminary seedling placement table 13. As shown in FIG.

In the spare seedling placing table 13, the frame 23 is a flat plate portion, similar to the frame 21 of the spare seedling placing table 11 (see the above-mentioned (first preliminary seedling placing table) and FIGS. 7 to 12). 28, with upper and lower hollows 29; In this case, the frame 23 does not have the elongated hole 28b of the flat plate portion 28 .

The preliminary seedling loading table 13 is provided with the same supporting rollers 33 as the supporting rollers 31 of the preliminary seedling loading table 11. Structure of Supporting the Support Rollers in 3.). Similar to the spare seedling placement table 11, the support rollers 33 are rotatably attached to the flat plate portions 28 of the right and left frames 23 around the axis P3 along the horizontal direction perpendicular to the longitudinal direction of the frame 23. mounted across.

The support rollers 33 are arranged side by side in the front-rear direction, and the right frame 23 and the left frame 23 are spaced apart from each other in the front-rear direction so that a gap C3 is formed between the adjacent support rollers 33 . supported by The longitudinal length (interval) L3 of the gap C3, which is the interval between the adjacent support rollers 33, is set to be larger than the outer diameter D3 of the support rollers 33. As shown in FIG.

As described above (overall configuration of the first preliminary seedling loading table) and shown in FIG. 4, the roll-shaped seedlings E are dropped into the adjacent support rollers 33 (gap C3) in the same manner as the preliminary seedling loading table 11. can be placed as follows.

(Construction for supporting the third spare seedling placement table)
As shown in FIGS. 3 and 4, the fulcrum portion 43 of the preliminary seedling loading table 11 and the fulcrum portion 45 of the preliminary seedling loading table 13 are connected in a swingable manner so that the preliminary seedling loading table 13 is configured as a preliminary seedling loading table. 11 is swingably supported around a second support axis P21 extending in the left-right direction.

As a result, the front and rear ends of the right frame 21 and the left frame 21 of the first preliminary seedling placement table 11 and the front and rear ends of the right frame 23 and the left frame 23 of the third preliminary seedling placement table 13 are arranged. , are supported so as to be able to swing about a second support axis P21 along the left-right direction.

The preliminary seedling tray 13 is swingably supported around a second support axis P21 at the rear of the preliminary seedling tray 11, so that the preliminary seedling tray 13 is connected to the preliminary seedling tray 11. A working posture A12, which is a second working posture extending rearward from the rear portion of the seedling loading table 11, and a storage posture A22, which is a second storing posture folding upward from the rear portion of the spare seedling loading table 11. It is possible to change the posture to

As shown in FIGS. 17 and 18, round-bar-shaped support frames 47, which are support portions, are provided at the right front portion and the left front portion of the step 6 along the left-right direction. When the preliminary seedling loading table 13 is operated to the working posture A12, the horizontal frame 66 of the preliminary seedling loading table 13 is placed on the support frame 47, and the rear part of the preliminary seedling loading table 13 is supported by the support frame 47. - 特許庁As a result, the front portion of the preliminary seedling platform 13 is supported by the rear portion of the preliminary seedling platform 11, and the rear portion of the preliminary seedling platform 13 is supported by the step 6 (support frame 47).

When the spare seedling tray 13 is operated to the working posture A12, the support frame 47 enters between the rear end portion of the frame 23 and the engagement portion 46, and the engagement portion 46 is engaged with the support frame 47. Become. As a result, the rear end portion of the frame 23 and the engagement portion 46 determine the position of the preliminary seedling tray 13 in the front-rear direction.

As described above (structure of frame in the first spare seedling placement table) and shown in FIG. 8, the mounting position of the spare seedling placement table 11 on the support frames 16 to 19 can be adjusted in the front-rear direction. By adjusting the mounting position of the spare seedling placing table 11 in the longitudinal direction, the position of the spare seedling placing table 13 in the working posture A12 can be adjusted in the longitudinal direction.

17 and 18, the support frame 47 is disengaged between the rear end portion of the frame 23 and the engaging portion 46 when the preliminary seedling tray 13 is operated to the working posture A12. can be set so that the engaging portion 46 can be engaged with the support frame 47 without coming off.

As shown in FIGS. 1 and 3 , the rear holding portion 26 is provided at a portion of the support frame 17 protruding upward from the preliminary seedling loading table 11 and below the preliminary seedling loading table 24 .
By operating the spare seedling placing table 13 to the storing posture A22 and holding the locking portion 40 of the spare seedling placing stand 13 in the rear holding portion 26, the spare seedling placing stand 13 can be held in the storing posture A22. By releasing the holding of the rear holding part 26, the preliminary seedling placing table 13 can be operated to the working posture A12.

(Configuration related to the third spare seedling mount and fuel tank on the right)
As shown in FIGS. 2 and 18, a fuel tank 48 is arranged inside the right front portion of the step 6 and provided in the fuselage 3 , and a filler port 48 a of the fuel tank 48 passes through the opening 6 a of the step 6 . and upwards. When the right preliminary seedling loading table 13 is operated to the working posture A12, the fuel tank 48 (fueling port 48a) is positioned below the right preliminary seedling loading table 13. As shown in FIG.

In the right spare seedling placement table 13, a flat plate-like cover 49, which is a protective portion, is connected to the horizontal frame 66 and extends forward under the support rollers 33. As shown in FIG. When the right spare seedling rest 13 is operated to the working posture A12, the upper side of the fuel tank 48 (fuel inlet 48a) and the upper side of the opening 6a of the step 6 are covered with the cover 49.

(Positional state of the 1st, 2nd and 3rd spare seedling trays)
As shown in FIGS. 1 and 3, the preliminary seedling loading table 11 is set in a forward-rising posture in which the front portion of the preliminary seedling loading table 11 is higher than the rear portion of the preliminary seedling loading table 11 with respect to the machine body 3. there is
In the state where the spare seedling mounts 12 and 13 are operated to the working postures A11 and A12, the front portions of the spare seedling mounts 12 and 13 with respect to the machine body 3 are the preliminary seedling mounts. It is set in a forward-rising attitude, which is higher than the rear parts of 12 and 13.

When the spare seedling resting table 12 is operated to the storage posture A21, the angle B1 in the side view between the spare seedling resting table 12 in the storing posture A21 and the spare seedling resting table 11 is set to be smaller than a right angle. , a retracted posture A21 is set.
When the spare seedling platform 13 is operated to the storage posture A22, the angle B2 between the spare seedling platform 13 in the storage posture A22 and the spare seedling platform 11 in a side view is smaller than a right angle. , the retracted posture A22 is set.

The retracted postures A21 and A22 are set such that the angle B2 is slightly smaller than the angle B1. As a result, the storage posture A21 is set to stand up from the spare seedling tray 11 rather than the storage posture A22, and the storage posture A22 is set to be closer to the spare seedling tray 11 than the storage posture A21.

With the above configuration, at least one of the storage posture A21 and the storage posture A22 is higher than the working posture A11 and the working posture than the posture in which the preliminary seedling tray 12 and the preliminary seedling tray 13 are stacked on the preliminary seedling tray 11. It is set to a posture close to A12.

(First alternative embodiment of the invention)
As shown in FIG. 19, assuming an imaginary line K2 extending in the front-rear direction along the preliminary seedling tray 11 in a side view, the preliminary seedling tray 12 is operated to the working posture A11, and the preliminary seedling tray is operated. The first fulcrum portion 41, the second fulcrum portion 42, and the The first contact portion 51 and the second contact portion 52 may be configured.

The front-to-rear length of the spare seedling placing table 13 may be set shorter than the front-to-rear length of the spare seedling placing table 12. - 特許庁According to this configuration, when the preliminary seedling loading table 13 is operated to the working posture A12, the rear part of the preliminary seedling loading table 13 may not be supported by the support frame 47 (see FIGS. 17 and 18).

In this case, the preliminary seedling loading table 13 may be set (maintained) in the working posture A12 by abutment between the fulcrum portion 43 of the preliminary seedling loading table 11 and the fulcrum portion 45 of the preliminary seedling loading table 13. .
The configuration of the first horizontal frame 61 and the second horizontal frame 62 described in the above (configuration related to supporting the second spare seedling placement table) is the horizontal frame 63 (see FIG. 5) of the extra seedling placement table 11 and the spare seedling placement table. The lateral frame 65 (see FIG. 15) of the seedling platform 13 may also be adopted.

In the above-described configuration, as shown in FIG. 19, the preliminary seedling loading table 13 is operated to the working posture A12, and the work of the preliminary seedling loading table 13 is performed in a state where the seedling E is not placed on the preliminary seedling loading table 13. The fulcrum portions 43 and 45 may be configured such that the posture A12 is set upward from the virtual line K2.

(Second alternative embodiment of the invention)
The front-to-rear length of the spare seedling loading table 12 may be set to be shorter than the front-to-back length of the preliminary seedling loading table 13. - 特許庁In this configuration, as shown in FIGS. 1 and 2, the front end of the preliminary seedling tray 11 is arranged at substantially the same position as the front end of the bonnet 9 and the front end of the floor 5 in the longitudinal direction of the machine body 3. It should be configured as follows.

(Third alternative embodiment of the invention)
As shown in FIG. 3, an angle B1 in a side view between the preliminary seedling tray 12 and the preliminary seedling tray 11 in the storage posture A21, and the auxiliary seedling tray 13 and the preliminary seedling tray 11 in the storage posture A22. At an angle B2 in a side view between may be configured.

It may be configured such that when the spare seedling platform 12 is operated to the retracted posture A21, the spare seedling platform 12 assumes a vertical posture (parallel to the support frame 16). In this configuration, angle B1 is slightly larger than the right angle.

It may be configured such that when the spare seedling platform 13 is operated to the retracted posture A22, the spare seedling platform 13 assumes a vertical posture (parallel to the support frame 17). In this configuration, angle B2 is slightly less than a right angle.

(Fourth alternative embodiment of the invention)
In FIG. 3, when the preliminary seedling loading table 12 is operated to the storage posture A21, the preliminary seedling loading table 12 assumes a posture in which the entire preliminary seedling loading table 12 is stacked above the preliminary seedling loading table 11, and the preliminary seedling. When the platform 13 is operated to the retracted posture A22, the posture shown in FIG. 3 may be assumed.
In this configuration, the front holding part 25 is eliminated, and the front-rear length of the spare seedling platform 12 is the same as the front-rear length of the spare seedling platform 11 or slightly shorter than the front-rear length of the spare seedling platform 11. should be set to

When the front holding part 25 is left without being abolished, the preliminary seedling placing table 12 is moved to the storage posture A21 held by the front holding part 25 and the preliminary seedling placing table 12 is placed on the whole of the preliminary seedling placing table 12. The configuration may be such that the seedlings are placed in the storing posture A21 stacked above the spare seedling placing table 11 so as to be operated. In this configuration, two types of storing attitudes A21 with different attitudes are set in the spare seedling placing table 12. - 特許庁

(Fifth alternative embodiment of the invention)
In FIG. 3, when the spare seedling platform 12 is operated to the storage posture A21, the spare seedling platform 12 assumes the posture shown in FIG. 3, and when the spare seedling platform 13 is operated to the storage posture A22. 13 may be configured so as to be stacked above the preliminary seedling loading table 11 over the entirety of the preliminary seedling loading table 13 .

In this configuration, the rear holding part 26 is eliminated, and the front-rear length of the spare seedling platform 13 is the same as the front-rear length of the spare seedling platform 11 or slightly shorter than the front-rear length of the spare seedling platform 11. should be set to When an operator gets on and off the floor 5 from the ground and from the floor 5 to the ground, the operator can hold both the frame 14 (see FIG. 1) and the support frame 17 as handrails.

When the rear holding part 26 is left without being abolished, the spare seedling placing table 13 is placed in the storage posture A22 held by the rear holding part 26, and the spare seedling placing table 13 is placed on the whole of the spare seedling placing table 13. The configuration may be such that the seedlings are stacked on the upper side of the spare seedling placing table 11 so as to be operated in the storing posture A22. In this configuration, two types of storing postures A22 with different postures are set in the spare seedling placing table 13. As shown in FIG.

(Sixth alternative embodiment of the invention)
In FIG. 3, when the preliminary seedling loading table 13 is operated to the retracted posture A22, the preliminary seedling loading table 13 is stacked above the preliminary seedling loading table 11 over the entirety of the preliminary seedling loading table 13. , the spare seedling placement table 12 may be configured as described below.

As shown in FIGS. 20, 21 and 22, a first support portion 53, which is a front-rear support portion, is provided on the front portion of the preliminary seedling placement table 11 so as to be movable in the front-rear direction, and a second support portion, which is a front-rear support portion. The portion 54 is supported on the front portion of the first support portion 53 so as to be swingable about an axis P5 extending in the left-right direction. A spare seedling platform 12 is supported on the front portion of the second support portion 54 so as to be swingable around the first support axis P11.

The state shown in FIG. 20 is a state in which the preliminary seedling loading table 12 is operated to the working posture A11, and the first support portion 53 is moved to the position where the rear portion of the preliminary seedling loading table 12 touches the front portion of the preliminary seedling loading table 11. and the second support portion 54 is operated rearward (toward the inside of the preliminary seedling tray 11).

As shown in FIG. 20, when the spare seedling loading table 13 is operated to the retracted posture A22, as shown in FIG. Then, the position of the shaft center P5 is brought out to a position on the front side of the front part of the preliminary seedling placing table 11.例文帳に追加Next, as shown in FIG. 22, the preliminary seedling placement table 11 and the second support portion 54 are swung upward about the axis P5 to change the attitude upward with respect to the preliminary seedling placement table 11. As shown in FIG.

By the above-described operation, the position of the first support shaft center P11 is set to a position that is substantially the same as the upper surface of the spare seedling placing table 13 in the stored posture A22, or a position slightly higher than the upper surface of the spare seedling placing table 13 in the stored posture A22. Therefore, the preliminary seedling loading table 12 is swung backward around the first support shaft center P11, and the entirety of the preliminary seedling loading table 12 is stacked above the preliminary seedling loading table 13 in a storage position A21. to operate.

(Seventh alternative embodiment of the invention)
In the sixth embodiment of the invention described above, the first support portion 53 is provided at the rear portion of the spare seedling placement table 11 so as to be movable in the front-rear direction, and the second support portion 54 is provided at the axis P5 along the left-right direction. It is supported on the rear portion of the first support portion 53 so as to be able to swing about, and the preliminary seedling placement table 13 is supported on the rear portion of the second support portion 54 so as to be able to swing about the second support axis P21. may be configured.

According to this configuration, the preliminary seedling loading table 12 is operated to the storage posture A21 in which the entirety of the preliminary seedling loading table 12 is stacked above the preliminary seedling loading table 11, and the preliminary seedling loading table 13 is moved to the storage position A21. is operated to a storage posture A22 stacked above the spare seedling resting table 12 in the storage posture A21.

(Eighth alternative embodiment of the invention)
As shown in FIG. 23 , in the preliminary seedling placement table 13 , right and left brackets 55 are provided on the right and left engaging portions 46 and are rear guide members having lengths spanning the right and left frames 23 . A certain rear guide roller 50 has an axis along the left-right direction perpendicular to the longitudinal direction of the frame 23, and is rotatable around an axis P6, which is the rear axis, across the right and left brackets 55. It may be configured to be supported by

As a result, the rear end of the preliminary seedling placement table 13 is adjusted so that the rear guide roller 50, which is rotatable around the axis P6 extending in the left-right direction, is positioned at a position higher than the support roller 33 (seedling placement portion). provided in the department.

(Ninth alternative embodiment of the invention)
As the front guide member and the rear guide member, instead of the front guide roller 38 and the rear guide roller 50, a fixed cylindrical member (not shown) that does not rotate, or a flat plate that is set in an inclined posture facing obliquely backward and downward. A front guide plate (not shown) and a flat plate-shaped rear guide plate (not shown) set in a tilted posture facing obliquely forward and downward may be provided on the spare seedling trays 12 and 13 .

(Tenth alternative embodiment of the invention)
As shown in FIG. 24, when the roll-shaped seedlings E are placed on the preliminary seedling mounts 11, 12, and 13, the roll-shaped seedlings E are piled up in a seedling box 56 and placed on the seedling box 56. may be placed on the preliminary seedling mounts 11, 12, 13.
In FIG. 24, seedling boxes 56 are placed one by one on each of the spare seedling trays 11, 12 and 13, but seedling boxes 56 loaded with roll-shaped seedlings E may be vertically stacked. good.

(Eleventh alternative embodiment of the invention)
As a seedling placement portion of the spare seedling placing table 11, a support roller 31 or a support member (not shown) having a main function of supporting the seedling E and a main function of conveying the seedling E along the front-rear direction are provided. The supporting rollers 31 may be mixed with the preliminary seedling placement table 11 .
In this case, the support roller 31 whose main function is to support the seedling E may be configured as a non-rotating, fixed one. The support member may be configured as a non-rotating fixed rod-like member or an elongated plate-like member.
The above-described configuration may be employed for the preliminary seedling loading table 12 and the preliminary seedling loading table 13 .

In the preliminary seedling placement table 11, the non-rotating fixed support rollers 31 and the rotatable support rollers 31 may be arranged alternately along the front-rear direction.
In this case, the fixed support roller 31 that does not rotate has the function of supporting the seedling E, but the function of transporting the seedling E in the front-rear direction is small or does not exist. The rotatable support rollers 31 have both the function of supporting the seedlings E and the function of transporting them in the front-rear direction.
The above-described configuration may be employed for the preliminary seedling loading table 12 and the preliminary seedling loading table 13 .

(Twelfth alternative embodiment of the invention)
An ultrasonic wave type or infrared type boarding/alighting detection unit (not shown) is provided so that the worker's boarding/alighting operation from the ground to the floor 5 and from the floor 5 to the ground is detected by the boarding/alighting detection unit. An electric motor (not shown) may be provided as a storage mechanism for swinging the mounting table 13 around the second support shaft P21.

As a result, when the operator's getting on/off motion from the ground to the floor 5 and from the floor 5 to the ground is detected by the boarding/alighting detector in a state in which the preliminary seedling placing table 13 is operated to the working posture A12, the electric motor is operated to place the preliminary seedlings. The placement table 13 may be automatically operated to the storage posture A22 or the posture stacked on the spare seedling placement table 11 (storage posture A22).

(Thirteenth alternative embodiment of the invention)
The frames 21, 22, 23 of the preliminary seedling stands 11, 12, 13 may be provided with a flat plate portion 28 and an upper hollow portion 29, and the lower hollow portion 29 may be eliminated. A flat plate portion 28 and a lower hollow portion 29 may be provided and the upper hollow portion 29 may be eliminated.
The cross-sectional shape of the hollow portion 29 may be formed in a circular shape instead of a quarter circle shape.

(Fourteenth alternative embodiment of the invention)
The support rollers 31, 32, 33 may be eliminated from the preliminary seedling placement bases 11, 12, 13, and a plate-shaped member may be attached across the right and left frames 21, 22, 23 as the seedling placement section. .

The support roller 32 is used as the seedling placement portion in the preliminary seedling placement table 12, and the support rollers 31 and 33 are eliminated in the preliminary seedling placement tables 11 and 13, and a flat member is used as the seedling placement portion on the right side. and the left frame 21, 23.

The support roller 33 is used as the seedling placement portion in the preliminary seedling placement table 13, the support rollers 31 and 32 are eliminated in the preliminary seedling placement tables 11 and 12, and the plate-like member is used as the seedling placement portion on the right side. and the left frame 21, 22.

The support rollers 32 and 33 are used as the seedling placement section in the preliminary seedling placement sections 12 and 13, and the support roller 31 is eliminated in the preliminary seedling placement section 11, and a flat member is used as the seedling placement section on the right side. and over the left frame 21 .

(Fifteenth alternative embodiment of the invention)
The spare seedling trays 11, 12 and 13 may be provided and the spare seedling tray 13 may be eliminated. In this configuration, the rear guide roller 50 may be provided at the rear end portion of the preliminary seedling placement table 11 .

The spare seedling trays 11, 12 and 13 may be provided and the spare seedling tray 12 may be eliminated. In this configuration, the front guide roller 38 may be provided at the front end of the preliminary seedling placement table 11 .

In the spare seedling placing stands 11, 12, 13, the spare seedling placing stands 12, 13 are connected to the spare seedling placing stand 11 in working postures A11, A12, and the spare seedling placing stands 12, 13 are folded in the storage postures A21, A22. It may be configured to be disabled. In this configuration, a plurality of preliminary seedling stands 11, 12, 13 may be arranged vertically and supported by support frames 16, 17 while providing vertical intervals.

(Sixteenth alternative embodiment of the invention)
The preliminary seedling mounts 11, 12 and 13 may be separated from each other to form independent preliminary seedling mounts 11, 12 and 13, respectively. In this configuration, the preliminary seedling stands 11, 12 and 13 may be arranged vertically and supported by the support frames 16 and 17 while providing a vertical interval therebetween.
In this configuration, a front guide roller 38 is provided at the front end of each of the preliminary seedling mounts 11, 12, 13, and a rear guide roller 50 is provided at the rear end of each of the preliminary seedling mounts 11, 12, 13. good.

INDUSTRIAL APPLICABILITY The present invention can be applied not only to a preliminary seedling tray used in a riding rice transplanter, but also to a preliminary seedling tray used in a walking rice transplanter. It can also be applied to a table.

21 frame 22 frame 23 frame 28 flat plate portion 28a opening 29 hollow portion 29a portion 29b portion 31 support roller (seedling placing portion)
32 support roller (seedling placement unit)
33 support roller (seedling placement unit)
34 Support shaft 34a Portion 34b End 35 Bearing 36 Bearing holder 36b Protruding portion 37 Bearing portion 37b Mounting portion 37c Engagement portion 37d Shaft insertion portion 37e Groove portion (anti-rotation portion)
37f Positioning portion P1 Shaft center P2 Shaft center P3 Shaft center

Claims (10)

one frame and the other frame,
a seedling placement unit mounted across one and the other frame and on which the seedling is placed and supported;
The one frame and the other frame have a flat plate shape along the vertical direction when viewed in cross section, a flat plate portion extending along the longitudinal direction of the seedling placement portion when viewed from the side, and a flat plate portion extending from the flat plate portion when viewed in cross section. a hollow portion having a large width, connected to the flat plate portion, and extending along the longitudinal direction of the seedling placement portion in a side view,
A preliminary seedling mounting base in which the seedling mounting section is attached over one and the other flat plate sections. The hollow portion is connected to upper and lower portions of the flat plate portion in a cross-sectional view,
A portion of the hollow portion facing the central portion of the seedling placement portion is formed in a straight line along the vertical direction in a cross-sectional view,
A portion of the hollow portion opposite to the central portion of the seedling mounting portion is formed in an arcuate shape projecting toward the side opposite to the central portion of the seedling mounting portion in a cross-sectional view. A spare seedling stand described in . The seedling placement section is mounted across one and the other flat plate sections so as to be rotatable around an axis perpendicular to the longitudinal direction of the frame, and a plurality of seedling placement sections are arranged side by side along the longitudinal direction of the frame. 3. A preliminary seedling rest according to claim 1 or 2, which is a supporting roller. a support shaft on which the support roller is rotatably supported;
a bearing portion attached to one and the other of the flat plate portions and supporting one portion and the other portion of the support shaft;
The bearing portion includes: a mounting portion that is inserted into an opening formed in the flat plate portion; 4. A spare seedling placing stand according to claim 3, further comprising an engaging portion for preventing the seedling from dropping out of the opening. 5. The preliminary seedling placement table according to claim 4, wherein rotation of the bearing portion around the axis is prevented by contacting the bearing portion attached to the flat plate portion with the hollow portion. A shaft insertion portion that supports the support shaft by inserting the support shaft is provided in the bearing portion,
6. The preliminary seedling placing table according to claim 4, wherein a rotation preventing portion for stopping rotation of said support shaft around said axis is provided in said shaft insertion portion. 7. The preliminary seedling placement table according to claim 6, wherein the anti-rotation portion is a flat plate-shaped groove into which a flat plate-shaped portion at the end of the support shaft is inserted. 8. The preliminary seedling rest according to claim 6 or 7, wherein a positioning portion for determining a position of the support shaft in the axial direction by abutting the end portion of the support shaft is provided in the shaft insertion portion. a bearing attached to the outer surface of the support shaft;
a bearing holder that is divided into two and attached to the outer surface of the bearing,
The support roller is formed in a cylindrical shape with one end and the other end open,
The bearing is attached to the outer surface of the support shaft, the bearing holder is attached to the outer surface of the bearing, and the bearing holder is press-fitted to the end of the support roller so that the support roller is attached to the bearing and the bearing. A spare seedling rest according to any one of claims 4 to 8, which is rotatably supported by said support shaft via a holder. When the bearing holder is press-fitted into the end portion of the support roller, the convex portion is pressed against the inner surface of the end portion of the support roller to reinforce the attachment of the bearing holder to the support roller. provided on the outer surface of the
The convex portion extends from a portion of the bearing holder opposite to the insertion side of the support roller by a predetermined length toward the insertion side of the support roller from the support roller of the bearing holder. 10. The preliminary seedling rest according to claim 9, which is formed toward the end on the side of insertion into the seedling.

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