JP2020103081A - Riding-type rice transplanter - Google Patents

Abstract

To provide a riding-type rice transplanter that allows for a smooth loading work of mat-like seedlings to a preliminary seedling tray.SOLUTION: A riding-type rice transplanter includes preliminary seedling trays 31, 32 on which mat-like seedlings to be supplied to a seedling tray can be loaded. The preliminary seedling trays 31, 32 includes seeding retaining members 43, 44 that can be switched between an action state of capable of receiving the mat-like seedlings loaded on the preliminary seedling trays 31, 32 and a non-action state of incapable of receiving the mat-like seedlings loaded on the preliminary seedling trays 31, 32 by being stored in the preliminary seedling trays 31, 32.SELECTED DRAWING: Figure 2

Description

The present invention relates to a configuration of a spare seedling placing table in a riding type rice transplanter.

For example, the spare seedling accommodation structure of the riding rice transplanter disclosed in Patent Document 1 is provided with a spare seedling placing table (“preliminary seedling placing section” in the document) capable of placing mat-like seedlings to be supplied to the seedling placing table. , A seedling stopping member ("stopper" in the literature) is provided on the preliminary seedling mounting table. The seedling stopping member is configured to be rotatable between a position located above the mounting surface of the mat-shaped seedling and a position located below the mounting surface of the mat-shaped seedling.

JP, 2011-62159, A

By the way, the seedling stopping member disclosed in Patent Document 1 projects below the preliminary seedling placing table in a state where it is not used for receiving mat-like seedlings. In this state, when the preliminary seedling placing bases are arranged vertically, when the worker inserts the mat-like seedlings from the front end or the rear end of the preliminary seedling placing base, the mat-like seedlings are one step higher than the preliminary seedlings. It is also conceivable that the seedling stopping member provided on the platform will be caught. In order to avoid such inconvenience, when the seedling stopping member is not used for receiving the mat-like seedlings, it is desirable that the seedling stopping member be held in the position stored in the preliminary seedling placing table.

An object of the present invention is to provide a riding-type rice transplanter capable of smoothly placing mat-like seedlings on a preliminary seedling placing table.

The riding type rice transplanter of the present invention is provided with a spare seedling placing table on which mat-like seedlings to be supplied to the seedling placing table can be placed, and the spare seedling placing table is the mat placed on the spare seedling placing table. A seedling stopping member capable of switching between an action state capable of receiving a seedling-shaped seedling and a non-acting state in which the mat-like seedling stored in the spare seedling mounting base and placed on the spare seedling mounting base cannot be received. It is characterized by having.

According to the present invention, when the seedling stopping member is in the non-acting state, the seedling stopping member is stored in the spare seedling mounting table, so that the seedling stopping member in the non-acting state is not stored in the spare seedling mounting base, The seedling stopping member is easily held in the non-acting position. Further, when the seedling stopping member in the non-acting state is stored in the preliminary seedling placing table, for example, when the worker inserts the matting seedling from the front end portion or the rear end portion of the preliminary seedling placing table, the matting seedling is The risk of being caught by the stop member is reduced. As a result, a riding-type rice transplanter capable of smoothly placing mat-shaped seedlings on the preliminary seedling placing table is realized.

In the present invention, the preliminary seedling mounting base is provided with a swing support portion that swingably supports the seedling stopping member, and the seedling stopping member is configured to swing about the swing supporting portion as an axis. It is preferable that the operating state and the non-operating state are switchable.

With this configuration, since the preliminary seedling placing table is provided with the swing support portion, the worker can switch between the working state and the non-working state by only swinging the seedling stopping member. Further, since the preliminary seedling placing table also serves as the support structure for the seedling stopping member, the supporting structure is simplified as compared with the structure in which a dedicated supporting structure for the seedling stopping member is provided.

In the present invention, it is preferable that the seedling stopping member is provided at an end portion in the longitudinal direction of the preliminary seedling placing table.

With this configuration, the area where the mat-like seedlings can be placed on the preliminary seedling placing table is secured as wide as possible, and the mat-like seedlings are prevented from slipping down from the longitudinal end portion of the preliminary seedling placing table.

In the present invention, the preliminary seedling placing table has a bottom portion on which the mat-like seedlings can be placed, and a pair that can stand up from both sides in the lateral direction of the bottom and receive the mat-like seedlings at both sides in the lateral direction. It is preferable that the seedling stopping member is provided on the sidewall portion of the end portion in the longitudinal direction of the preliminary seedling placing table.

With this configuration, the side wall portion also serves as a support structure for the seedling stopping member, so that the support structure is simplified as compared with a configuration in which a dedicated supporting structure is provided for the seedling stopping member.

In the present invention, the seedling stopping member is configured to be able to expose the non-acting state by being housed in the side wall portion, and protrudes inward in the lateral direction of the preliminary seedling placing table from the side wall portion. It is preferable that the above-mentioned operating state can be revealed by doing so.

With this configuration, since the side wall also serves as a storage space for the seedling stopping member, when the operator inserts the mat-like seedling from the front end or the rear end of the preliminary seedling placing table, the mat-like seedling is used. The risk of being caught by the stop member is further reduced.

In the present invention, the preliminary seedling placing table has a bottom portion on which the mat-like seedlings can be placed, and a pair that can stand up from both sides in the lateral direction of the bottom and receive the mat-like seedlings at both sides in the lateral direction. It is preferable that the seedling stopping member is provided on the bottom of the end portions in the longitudinal direction of the preliminary seedling placing table.

According to this configuration, since the seedling stopping member is provided at the bottom, the seedling stopping member can more easily form the mat-shaped seedlings as compared with the configuration in which the seedling stopping member is provided at a position other than the bottom of the preliminary seedling placing table. It will be easier to catch.

In the present invention, a recessed portion is formed in the bottom portion so as to be recessed below the bottom portion, and the seedling stopping member is configured to be able to expose the non-acting state by being stored in the recessed portion, and It is preferable that the working state can be revealed by projecting above the bottom.

According to this configuration, since the seedling stopping member in a non-acting state is stored in the recess, the operator can insert the mat-like seedling from the front end portion or the rear end portion of the preliminary seedling placing table without being caught by the seedling stopping member. Further, since the seedling stopping member in the operating state projects above the bottom, the seedling stopping member firmly receives the mat-like seedling, and further prevents the mat-like seedling from slipping off from the preliminary seedling placing table.

It is a left side view of a riding type rice transplanter. It is a top view of the front of a riding type rice transplanter. It is a front view of the front part of a riding type rice transplanter. It is a left side view near the left preliminary seedling mounting stand in the first state. It is a left side view near the left preliminary seedling placing stand in the second state. It is a left side view showing the state where the position of the left preliminary seedling placing table in the first state was changed to the central position, the front position, and the rear position. It is a disassembled perspective view of the vicinity of a left support member and a support link. It is a vertical front view of the vicinity of the left support member. It is a left side view near the left support member. It is a top view of the preliminary seedling mounting stand which shows a seedling stop member. It is the XI-XI sectional view taken on the line of FIG. 10 which shows the seedling stop member of an operating state. It is the XII-XII sectional view taken on the line of FIG. 10 which shows the seedling stop member of a non-action state. It is a top view of the front part of the riding type rice transplanter which shows another structure of a seedling stop member. It is a top view of the preliminary seedling mounting stand which shows another structure of a seedling stop member. It is the XV-XV sectional view taken on the line of FIG. 14 which shows a seedling stop member. It is the XVI-XVI sectional view taken on the line of FIG. 14 which shows a seedling stop member. It is a top view of the front part of the riding type rice transplanter which shows another embodiment of the seedling stop member shown in FIG.

1 to 11, F indicates the front direction, B indicates the rear direction, U indicates the upward direction, and D indicates the downward direction. R indicates the right direction, and L indicates the left direction.

[Overall structure of riding type rice transplanter]
As shown in FIG. 1, the riding-type rice transplanter has a link mechanism 4 supported at the rear of a body 3 having right and left front wheels 1 and right and left rear wheels 2 so as to be swingable up and down. A hydraulic cylinder 5 that is extended to the side and that moves up and down the link mechanism 4 is provided.

The seedling planting device 6 is supported by the rear part of the link mechanism 4, and a fertilizer application device 7 for supplying fertilizer to the rice field is provided across the rear part of the machine body 3 and the seedling planting device 6, and the seedling planting device 6 At the lower part on the front side, a leveling device 8 for leveling the rice field is supported.

As shown in FIGS. 1, 2, and 3, a plurality of preliminary seedling placement tables 31 and 32 are arranged on the upper part of the right part and the left part of the machine body 3.
[Structure of the front and rear support mechanism that supports the auxiliary seedling mounting base on the machine so that the position of the auxiliary seedling mounting base can be changed in the front-rear direction] The configuration of the supporting mechanism to be carried out], the preliminary seedling placing tables 31 and 32 are supported by the machine body 3 via the front-rear supporting mechanism 37 and the supporting mechanism 45.

[Airframe configuration]
As shown in FIGS. 1, 2 and 3, a support frame 23 is connected to a mission case 22 arranged in the front part of the machine body 3 and extends to the front side, and an engine (not shown) is supported by the support frame 23. Has been done. A hood 24 that covers the engine is provided at the front of the machine body 3.

A steering handle 25 for steering the front wheels 1, a speed change lever 26 for traveling, and an elevating lever 27 for operating the hydraulic cylinder 5 are provided above the bonnet 24.
The operation arm 53, which is arched in a front view, is supported by the support frame 23 so as to be operable in a standing posture (see FIGS. 1, 2, and 3) and a forward tilted posture in which the operating arm 53 is tilted forward from the standing posture. A center mascot 54 is provided on the upper part of the.

A floor 28 is provided from the right side and the left side of the hood 24 to the rear side of the hood 24, and a driver's seat 20 is arranged on an upper portion of a rear portion of the floor 28. On the floor 28, there are right and left passages between the bonnet 24 and the right preliminary seedling mounting bases 31, 32, and between the bonnet 24 and the left preliminary seedling mounting bases 31, 32. It moves from the aircraft 3 to the ridge or gets into the aircraft 3 from the ridge through the right or left passage.

A brake pedal 55 is provided on the right side of the hood 24 on the floor 28, a brake lever 56 connected to the brake pedal 55 is provided, and a lock lever 57 is provided on the floor 28.

For example, when entering a paddy field over a ridge or when exiting a paddy field over a ridge, a worker descends from the machine body 3 and stands on the front side of the machine body 3 and sets the operation arm 53 in a forward leaning posture to operate. By holding the arm 53, the orientation of the machine body 3 is corrected and the lifting of the front portion of the machine body 3 is suppressed.

The operator extends the hand to operate the shift lever 26, or holds the brake lever 56 to operate the brake pedal 55. By engaging the lock lever 57 on the brake pedal 55 and the brake lever 56 in the depressed state (braking state), the brake pedal 55 and the brake lever 56 can be held in the depressed state (braking state).

As shown in FIG. 1, the seedling planting device 6 is provided with a planting transmission case 9, a rotating case 10, a planting arm 11, a float 12, a seedling stand 13, and the like.

The rotating case 10 is rotatably supported on the right and left portions of the rear part of the two planting transmission cases 9, and the planting arms 11 are supported on both ends of the rotating case 10. The seedling stand 13 is supported so as to be reciprocally movable in the left-right direction.

With the mat-shaped seedlings placed on the seedling placing table 13, the rotary case 10 is rotationally driven as the seedling placing table 13 is driven to reciprocate laterally in the left-right direction. The planting arms 11 alternately take out the seedlings from the lower part of the seedling stand 13 and plant them on the rice field. The mat-shaped seedlings for supply are placed on the preliminary seedling placing tables 31, 32. In other words, the preliminary seedling placing bases 31, 32 are configured so that mat-like seedlings to be supplied to the seedling placing base 13 can be placed.

As shown in FIG. 1, the right and left support cases 14 supported by the seedling planting device 6 extend to the front side, and a drive shaft (not shown) extends across the front part of the support case 14. Are rotatably supported, and a large number of ground leveling bodies 21 are attached to the drive shaft.

The power of the seedling planting device 6 is transmitted from the planting transmission case 9 to the drive shaft via a transmission chain (not shown) of the support case 14, and the drive shaft and the ground leveling body 21 are rotated counterclockwise in FIG. It is driven to rotate, and the leveling body 21 leveles the rice field.

[Structure of the front-rear support mechanism that supports the spare seedling stand on the machine so that the position can be changed in the front-back direction]
As shown in FIGS. 1 to 4, the frame 29 is connected to the support frame 23 and extends from the support frame 23 to the right and left sides, and the bracket 30 is connected to the right end portion and the left end portion of the frame 29. ing.

The lower portions of the right and left support frames 33 are swingably supported around the horizontal axis P1 of the bracket 30 in the front-rear direction, and the lower portions of the right and left support arms 34 are horizontal axis of the bracket 30. The support frame 33 and the support arm 34 are supported on the P2 so as to be swingable back and forth and extend upward.

As shown in FIGS. 2 and 3, recesses 28a are formed in the right front part and the left front part of the floor 28, and the lateral width near the hood 24 on the floor 28 is the lateral width near the driver's seat 20 on the floor 28. Is smaller than. The bracket 30, the lower portion of the support frame 33, and the lower portion of the support arm 34 are arranged so as to enter the recess 28a of the floor 28 in a plan view.

As shown in FIGS. 3, 7, 8 and 9, the support member 35 bent into an angle shape is connected to the upper end portion of the support frame 33 so that the fulcrum shaft 33 a is outwardly attached to the upper end portion of the support frame 33. It is connected.

As shown in FIGS. 4, 7, and 8, a support member 36 formed by bending a plate material into a box shape is supported by a fulcrum shaft 33a of a support frame 33 so as to be swingable around a horizontal axis P3. ing. An upper end portion of the support arm 34 is swingably connected to an arm portion 36a extending from the support member 36 to the front side around an axis P4 in the left-right direction.

As shown in FIGS. 1, 4, and 6, the support frame 33, the support arm 34, and the support member 36 are configured as a parallel quadruple link in a side view. By swinging the support frame 33 and the support arm 34 back and forth, the support member 36 maintains the posture along the vertical direction, while the support frame 33 is at the center position B1 along the vertical direction, and the support frame 33 is on the front side. The position is changed in the front-rear direction to the front position B2 which is inclined to the front and the rear position B3 where the support frame 33 is inclined to the rear.

As shown in FIG. 3, right and left torsion springs 46 in which a round rod-shaped elastic material is bent are provided. The torsion spring 46 is arranged along the axis P1, one end of the torsion spring 46 is connected to the support frame 23, and the other end of the torsion spring 46 is connected to the support frame 33. The support frame 33 is biased by the torsion spring 46 from the front position B2 and the rear position B3 to the central position B1.

As described above, the front-back support mechanism 37 including the support frame 33, the support arm 34, the support member 36, and the like is provided. As described in [Configuration of Support Mechanism for Supporting Front and Rear Support Mechanisms to Change Position of Preliminary Seedling Platform in First State and Second State] described below, the preliminary seedling platforms 31, 32 support the support mechanism 45. It is supported by the support member 36 via the.

As a result, the preliminary seedling mounts 31, 32 and the support mechanism 45 are supported by the front-rear support mechanism 37 (support member 36) at the central position B1, the front position B2, and the rear position B3 so that the positions thereof can be changed in the front-rear direction. ing.

[Structure for operating and holding the support member at the center position, front position and rear position in the front and rear support mechanism]
As shown in FIGS. 2, 3, 4, and 7, a front/rear operation tool 38 formed by bending a round bar is provided. The front-rear operation tool 38 is rotatably supported around the axis P5 of the support member 36 in the front-rear direction and extends from the support member 36 to the front side and the rear side.

A front end portion of the front-rear operation tool 38 is bent downward, and a handle portion 38a is provided at a front end portion of the front-rear operation tool 38, and a rear end portion of the front-rear operation tool 38 is bent downward so that a front-rear operation tool. A handle portion 38b is provided at the rear end of 38. As shown in FIGS. 7 and 8, inside the support member 36, a round bar-shaped engagement portion 38c is connected to the front-rear operation tool 38.

As shown in FIGS. 7, 8 and 9, an arc-shaped guide hole 39 is opened in the supporting member 35 in a side view. The guide hole 39 is provided with a central holding portion 39a, a front holding portion 39b, and a rear holding portion 39c which are opened downward, and a check portion 39d which projects downward from the upper side of the central holding portion 39a.

The engaging portion 38c of the front and rear operation tool 38 is inserted into the guide hole 39. Inside the support member 36, a receiving plate 38 d is connected to the front-rear operation tool 38, and a spring 40 is attached between the receiving plate 38 d of the front-rear operation tool 38 and the inner surface of the support member 36. The front/rear operation tool 38 is biased in the counterclockwise direction in FIG. 8 by the spring 40, and the engagement portion 38c of the front/rear operation tool 38 has the center holding portion 39a, the front holding portion 39b, and the rear holding portion of the guide hole 39. It is urged toward the side entering 39c.

[Operation to the central position, front side position and rear side position of the support member by the front and rear operation tool]
The state shown in FIGS. 4 and 9 is a state in which the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) are operated to the central position B1 (see FIG. 6).

In the state shown in FIGS. 4 and 9, the engaging portion 38c of the front and rear operation tool 38 enters the central holding portion 39a of the guide hole 39, and the front and rear operation tool 38 (the handle portions 38a, 38b) is held at the holding position C1 (FIG. 8), and the handle portions 38a and 38b of the front and rear operation tool 38 face downward at the holding position C1.

As a result, the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) are held at the central position B1 by the engaging portion 38c of the front and rear operation tool 38 and the central holding portion 39a of the guide hole 39.

An operator standing in a ridge or a paddy field on the front side of the machine body 3 can have a handle portion 38a of the front-rear operation tool 38, and a worker at the driver's seat 20 has a handle portion 38b of the front-rear operation tool 38. be able to.

As shown in FIGS. 8 and 9, when the operator holds the handle portions 38a and 38b of the front-rear operation tool 38 and operates the front-rear operation tool 38 around the axis P5 to the release position C2, the front-rear operation tool 38 is moved. The engaging portion 38c is pulled out upward from the central holding portion 39a of the guide hole 39.

The operator pushes and pulls the front-rear operation tool 38 back and forth while maintaining the handle parts 38a and 38b of the front-rear operation tool 38 at the release position C2, whereby the preliminary seedling placing bases 31, 32 and the support mechanism 45 ( As shown in FIG. 6, the support member 36) can be artificially repositioned in the front-rear direction from the central position B1 to the front position B2 or the rear position B3.

As shown in FIGS. 6 and 9, when the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) are changed to the front position B2 (rear position B3), the postures along the vertical direction With respect to the support member 36 maintained at, the support member 35 swings around the axis P3, and the guide hole 39 moves around the axis P3 with respect to the engaging portion 38c of the front and rear operation tool 38. Rock.

At the front side position B2, the engagement portion 38c of the front and rear operation tool 38 is located above the front side holding portion 39b of the guide hole 39, and at the rear side position B3, the engagement portion 38c of the front and rear operation tool 38 is located behind the guide hole 39. It is located above the side holding portion 39c.

After changing the positions of the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) to the front side position B2 (rear side position B3), the operator operates the forward/backward operation tool 38 to the holding position C1 to perform the forward/backward operation. The engaging portion 38c of the tool 38 is inserted into the front holding portion 39b (rear holding portion 39c) of the guide hole 39.

As a result, the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) are moved by the engaging portion 38c of the front and rear operation tool 38 and the front holding portion 39b (rear holding portion 39c) of the guide hole 39 as shown in FIG. Is held at the front position B2 (rear position B3) shown in FIG.

The operator changes the positions of the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) from the front position B2 to the central position B1 or the rear position B3, and from the rear position B3 to the central position B1 or the front position B2. In this case, the operator may hold the handle portions 38a and 38b of the front and rear operation tool 38, operate the front and rear operation tool 38 to the release position C2, and perform the same operation as described above.

When the worker changes the positions of the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) from the front position B2 to the rear position B3 (rear position B3 to front position B2), the middle position in the middle In B1, the restraining portion 39d of the guide hole 39 hits the engaging portion 38c of the front-rear operating tool 38, and the engaging portion 38c of the front-rear operating tool 38 is guided by the center holding portion 39a of the guide hole 39 to move the front-rear operating tool 38. Is operated to the holding position C1.

As a result, the preliminary seedling mounts 31, 32 and the support mechanism 45 (support member 36) are held at the central position B1 in the middle, and the operator operates the front and rear operation tool 38 again to the release position C2. The positions of the preliminary seedling placing bases 31, 32 and the support mechanism 45 (support member 36) are changed from the central position B1 to the rear position B3 (front position B2).

[Structure of Support Mechanism for Supporting Front and Rear Support Mechanisms to Change Position of Preliminary Seedling Platform to First and Second States]
As shown in FIGS. 4 and 7, the arm 36b is connected to the support member 36 and extends to the rear side, and the fulcrum shaft 36c is outwardly connected to the end of the arm 36b. ..

Round pipe-shaped support links 41 and 42 are provided. The central portion of the support link 41 in the longitudinal direction is supported by the fulcrum shaft 36c of the support member 36 so as to be swingable around the axis P6 in the left-right direction. The central portion of the support link 42 in the longitudinal direction is supported by the fulcrum shaft 33a of the support frame 33 so as to be swingable around the axis P3 in the left-right direction.

As shown in FIGS. 2, 3, 4, and 8, square pipe-shaped seedling platform frames 51 and 52 are provided. One end of the support link 41 is connected to the front-rear intermediate part of the seedling placing frame 51 so as to be swingable around the axis P7 in the left-right direction, and one end of the support link 42 has a left-right axis. It is connected to the front part of the seedling placing frame 51 so as to be swingable around the core P8.

The other end of the support link 41 is connected to the rear part of the seedling placing frame 52 so as to be swingable around the left-right axis P9, and the other end of the support link 42 is moved in the left-right axis P10. It is connected to the rear part of the seedling mount frame 52 so as to be swingable around.

As shown in FIGS. 1, 2, and 3, the preliminary seedling placing bases 31 and 32 are integrally formed of synthetic resin, and arch-shaped seedling stopping members 43 and 44 are provided in front of the preliminary seedling placing bases 31 and 32. It is provided in the rear part and the rear part. Although details will be described later, each of the arch-shaped seedling stopping members 43 and 44 is configured to be switchable between an operating state and a non-operating state.

As shown in FIG. 3 and FIG. 4, brackets 51a and 52a are provided on the front and rear of the seedling mounting table frames 51 and 52, respectively, and the brackets 51a and 52a are provided around the axes P11 and P12 in the front-rear direction. The preliminary seedling placing bases 31 and 32 are supported so that their postures can be changed between a horizontal use posture (see FIGS. 1, 2, and 3) and a standing storage posture.

The pressing member 47 in which a round bar-shaped elastic material is bent is provided on the bracket 51 a of the seedling mounting table frame 51. The pressing member 47 can be operated by the toggle function into a standing release position (see FIGS. 3 and 4) and a holding position in which the preliminary seedling mounting table 31 is pressed in the use position.

When the operator places an empty seedling box (not shown) or a seedling scooping plate (not shown) on the preliminary seedling placing table 31 in the use posture, the operator operates the holding member 47 in the holding posture to hold the holding member. Use 47 to keep empty seedling boxes and seedling scoops from being blown away by the wind.

As described above, the support mechanism 45 including the support links 41, 42 and the seedling placing frame 51, 52 is provided, and the [preliminary seedling placing base by the operating tool and the first state of the supporting mechanism described later and Operation to the second state], the preliminary seedling placing tables 31 and 32 are arranged in a first state A1 (see FIG. 4) in which the preliminary seedling placing tables 31 and 32 are arranged at a predetermined interval in the vertical direction, and in a row in the front-back direction. It is supported by the support member 36 by the support mechanism 45 so that the position thereof can be changed to the second state A2 (see FIG. 5) arranged in the shape of a circle.

[Structure for operating and holding the preliminary seedling placing table in the first state and the second state in the support mechanism]
As shown in FIGS. 2, 4 and 5, right and left operation tools 48 are connected to the rear parts of the right and left seedling placing frame 51 and extend to the rear side. Thus, the operation tool 48 is provided on the lateral side portion of the preliminary seedling placing table 31 on the lateral center side of the machine body along the front-rear direction.

The brackets 51b connected to the rear portions of the right and left seedling stand frames 51 support the right and left holders 49 so as to be swingable up and down around the left and right axis P13. It is extended to the rear so as to be arranged on the lower side. Accordingly, the holder 49 is provided on the lateral side portion of the preliminary seedling placing table 31 on the lateral center side of the machine body along the front-rear direction.

The holding tool 49 can be operated in the vertical direction to a holding position D1 which is separated downward from the operating tool 48, and a releasing position D2 which is closer to the operating tool 48 above the holding position D1. The recessed first engaging portion 49 a and the second engaging portion 49 b are provided at the base of the holder 49. The spring 50 is attached to the bracket 51b of the seedling placing frame 51, and the holder 50 is biased to the holding position D1 by the spring 50.

As shown in FIGS. 4, 5, and 7, in the right and left support links 41, one side and the other side sandwiching the portion (shaft core P7) swingably connected to the seedling mounting table frame 51. A pin-shaped first locking portion 41a and a second locking portion 41b are provided. A pin-shaped stopper portion 36d is provided on the arm portion 36b of the support member 36.

[Operation of the preliminary seedling stand and the support mechanism into the first state and the second state by the operation tool]
The state shown in FIGS. 1 to 4 is a state in which the plurality of preliminary seedling placing bases 31, 32 are operated in the first state A1 in which the plurality of preliminary seedling placing bases 31, 32 are arranged at a predetermined interval in the vertical direction.

In the state shown in FIG. 4, the support link 41 hits the stopper portion 36d of the support member 36 from above, the holder 49 is operated to the holding position D1, and the first engaging portion 49a of the holder 49 causes the support link 41 to move. Engaging with the first engaging portion 41a of the holder (the first engaging portion 41a of the support link 41 is inserted into the first engaging portion 49a of the holder 49), and the preliminary seedling placing bases 31, 32 are moved to the first position. It is a holding state held in the state A1.

When the operator holds the operation tool 48 with his/her hand in the holding state in which the preliminary seedling placement tables 31, 32 are held in the first state A1, hold the holding tool 49 with the hand as well. Then, the holder 49 can be operated from the holding position D1 to the release position D2, and the first engaging portion 49a of the holder 49 is disengaged from the first locking portion 41a of the support link 41.

As shown in FIGS. 4 to 5, when an operator pulls the operation tool 48 and the holder 49 at the release position D2 to the driver seat 20 side (rear side) while holding the support tools 41 and 42, the support links 41 and 42 are axially aligned. By swinging around P3 and P6 in the clockwise direction of FIGS. 4 and 5, the upper spare seedling stand 31 is repositioned to the driver seat 20 side (rear side), and the lower spare seedling mount 32 is located at the front side. Is relocated to.

As shown in FIG. 5, when the support link 42 hits the stopper portion 36d of the support member 36 from above, the swing of the support links 41, 42 is stopped, and in this state, the second link of the support link 41 is stopped. The locking portion 41b faces the second engaging portion 49b of the holder 49.

The state shown in FIG. 5 is the second state A2 in which the plurality of preliminary seedling placing stands 31 and 32 are arranged in a line in the front-rear direction. In the second state A2, the upper spare seedling stand 31 in the first state A1 is the driver seat 20 side (rear side), and the lower spare seedling stand 32 in the first state A1 is the front side. The front end portion 31a of the placing table 31 and the rear end portion 32b of the preliminary seedling placing table 32 are in contact with each other.

In the state shown in FIG. 5, when the operator releases the holder 49, the spring 50 causes the holder 49 to swing from the release position D2 to the holding position D1, and the second engaging portion 49b of the holder 49 causes the support link to move. The second locking portion 41b of 41 is engaged (the second locking portion 41b of the support link 41 is inserted into the second engaging portion 49b of the holder 49), and the preliminary seedling placing bases 31, 32 are moved to the first position. The two-state A2 holds the holding state.

In the second state A2 shown in FIG. 5, the operator operates the holding tool 49 from the holding position D1 to the releasing position D2 as described above, and holds the operating tool 48 and the holding tool 49 at the releasing position D2 to the front side. By performing a pushing operation, the positions of the preliminary seedling placing bases 31, 32 can be changed from the second state A2 to the first state A1 shown in FIG.

As described in the above [operation of the front and rear operation tools to the central position, front position and rear position of the support member], the operator operates the front and rear operation tools 38 to move the preliminary seedling placing tables 31, 32. While maintaining the holding state of the first state A1 (second state A2), the preliminary seedling placing table 31, 32 and the support mechanism 45 (support member 36) are positioned at the central position B1, the front position B2, and the rear position B3. Can be changed.

[Construction of seedling stopping member]
As shown in FIG. 2, each of the preliminary seedling placing bases 31 and 32 is formed in a U shape when viewed in the machine front-rear direction, and has bottom portions 31c and 32c and side wall portions 31d and 32d. Each of the bottom portions 31c and 32c is configured so that a mat-shaped seedling can be placed thereon. A notch 31i is formed in each of the front end 31a and the rear end 31b of the bottom 31c, and a notch 32i is formed in each of the front end 32a and the rear end 32b of the bottom 32c. A pair of side wall portions 31d and 31d are erected upward from the left and right lateral sides of the bottom portion 31c, and a pair of side wall portions 32d and 32d are erected upward from the left and right lateral sides of the bottom portion 32c. Therefore, the mat-like seedlings placed on the preliminary seedling placing table 31 are received by the side wall portions 31d on the left and right sides of the aircraft so as not to be displaced in the lateral direction of the aircraft, and placed on the preliminary seedling placing table 32. The mat-shaped seedlings are received by the side wall portions 32d, 32d on the left and right sides of the machine body so as not to be displaced in the lateral direction of the machine body. In other words, the pair of side wall portions 31d, 31d are configured to stand up from both sides in the lateral direction of the bottom portion 31c and receive mat-like seedlings in both sides in the lateral direction. Further, the pair of side wall portions 32d, 32d are configured to stand up from both sides in the lateral direction of the bottom portion 32c and to receive the mat-like seedlings in both sides in the lateral direction. From this, the mat-like seedlings placed on the preliminary seedling placing bases 31, 32 in the state where the preliminary seedling placing bases 31, 32 are held in the second state A2 are spread over the auxiliary seedling placing bases 31, 32 to be a body. It is configured to be slidable along the front-back direction.

In order to prevent the mat-like seedlings from slipping off the preliminary seedling placing bases 31 and 32 while the preliminary seedling placing bases 31 and 32 are held in the second state A2, a seedling stopper located at the front end of the preliminary seedling placing base 32. The member 44 and the seedling stopping member 43 located at the rear end of the preliminary seedling placing table 31 are used. As shown in FIGS. 2 and 10 to 12, seedling stopping members 43, 43 are provided at the front end portion 31a and the rear end portion 31b of the preliminary seedling placing table 31, and the seedling stopping members 44, 44 are the preliminary seedlings. It is provided at each of a front end portion 32a and a rear end portion 32b of the mounting table 32. The seedling stopping member 43 is provided at the end of the preliminary seedling placing base 31 in the longitudinal direction, and the seedling stopping member 44 is provided at the end of the preliminary seedling placing base 32 in the longitudinal direction.

As shown in FIGS. 10 to 12, each of the seedling stopping member 43 and the seedling stopping member 44 is formed in an arch shape. Vertical axis shaft holes 31e and 31e are formed at the front end and the rear end of the side wall portion 31d on the outside of the machine body, respectively, and the vertical axis of the vertical axis is formed on the front end and the rear end of the side wall portion 32d on the outside of the machine body. Shaft core holes 32e, 32e are formed. The seedling stopping member 43 is provided on the side wall portion 31d of the end portion of the preliminary seedling placing table 31 in the longitudinal direction. The seedling stopping member 44 is provided on the side wall portion 32d of the end portion in the longitudinal direction of the preliminary seedling placing table 32.

The seedling stopping members 43, 43 are inserted into the front and rear shaft core holes 31e, 31e, respectively, and the base end side of the seedling stopping member 43 is configured to be swingable about the shaft core hole 31e. From this, the swinging base end portion 43b of each of the seedling stopping members 43, 43 corresponds to a swinging support portion that swingably supports the seedling stopping member 43 in the present invention. Further, a pair of locking portions 43c, 43c are formed at the lower end of the swing base end portion 43b, and the swing base end portion 43b in the state of being inserted into the shaft core hole 31e is the shaft. The protrusion bulges outward from the surface of the swing base end portion 43b so as not to come off from the core hole 31e.

The seedling stopping members 44, 44 are inserted into the front and rear shaft core holes 32e, 32e, respectively, and the base end side of the seedling stopping member 44 is configured to be swingable about the shaft core hole 32e. .. From this, the rocking base end portion 44b of each of the seedling stopping members 44, 44 corresponds to a rocking support portion that rockably supports the seedling stopping member 44 in the present invention. Further, a pair of locking portions 44c, 44c are formed at the lower end portion of the swing base end portion 44b, and the swing base end portion 44b in the state of being inserted into the shaft core hole 32e is the shaft of the lock portions 44c, 44c. The protrusion bulges outward from the surface of the swing base end portion 44b so as not to come off from the core hole 32e.

Two storage recesses 31f, 31f are formed between the front and rear shaft core holes 31e, 31e, and a storage hole 31g is formed continuously with the storage recess 31f at the lower end of the storage recess 31f. Further, two storage recesses 32f, 32f are formed between the front and rear shaft core holes 32e, 32e, and a storage hole 32g is formed continuously with the storage recess 32f at the lower end of the storage recess 32f.

Each of the seedling stopping members 43 and 44 is configured to be switchable between a working state and a non-working state. The “operating state” means a state in which the mat-like seedlings placed on the preliminary seedling placing bases 31, 32 can be received. The “non-acting state” means a state in which the seedling stopping members 43 and 44 are stored in the preliminary seedling placing bases 31 and 32 and cannot receive the mat-like seedlings placed on the preliminary seedling placing bases 31 and 32, respectively. ..

When the seedling stopping member 43 is in the non-acting state, the free end of the seedling stopping member 43 is stored in the storage recess 31f. When the seedling stopping member 43 is in the operating state, the free end portion of the seedling stopping member 43 is located above the bottom portion 31c. The front storage recessed portion 31f is configured to be able to insert the free end portion of the front seedling stopping member 43, and the rear storage recessed portion 31f is configured to be able to insert the free end portion of the rear seedling stopping member 43. There is.

When the seedling stopping member 44 is inactive, the free end of the seedling stopping member 44 is stored in the storage recess 32f. When the seedling stopping member 44 is in the operating state, the free end portion of the seedling stopping member 44 is located above the bottom portion 32c. The front storage recessed portion 32f is configured to be able to insert the free end portion of the front seedling stop member 44, and the rear storage recessed portion 32f is configured to be able to insert the free end portion of the rear seedling stop member 44. There is.

At the lower end portion of the free end portion of the seedling stopping member 43, a column-shaped locking portion 43a is formed vertically. The seedling stopping member 43 in the non-acting state is held in the non-acting state by inserting the locking portion 43a into the storage hole 31g. In this way, the seedling stopping member 43 is configured to be switchable between an operating state and a non-operating state by swinging the swing base end portion 43b as the swing support portion around the axis.

Further, at the lower end portion of the free end portion of the seedling stopping member 44, a columnar locking portion 44a is formed vertically. The seedling stopping member 44 in the non-acting state is held in the non-acting state by inserting the locking portion 44a into the storage hole 32g. As described above, the seedling stopping member 44 is configured to be switchable between an operating state and a non-operating state by swinging the swing base end portion 44b as the swing support portion around the axis.

Use locking holes 31h and 31h for the vertical shaft core are formed in the bottom portion 31c of each of the front end portion 31a and the rear end portion 31b, and the vertical shaft core is used in the bottom portion 32c of each of the front end portion 32a and the rear end portion 32b. Locking holes 32h, 32h are formed. The used locking hole 31h in the front end 31a is configured to be able to insert the locking portion 43a of the front seedling stopping member 43, and the used locking hole 31h in the rear end 31b is the locking portion of the rear seedling stopping member 43. 43a can be inserted. The seedling stopping member 43 in the operating state is held in the operating state by inserting the locking portion 43a into the used locking hole 31h. Further, the use locking hole 32h in the front end portion 32a is configured so that the lock portion 44a of the front side seedling stopping member 44 can be inserted, and the use locking hole 32h in the rear end portion 32b engages with the rear side seedling stopping member 44. The stopper 44a is configured to be insertable. The seedling stopping member 44 in the operating state is held in the operating state by inserting the locking portion 44a into the used locking hole 32h.

The seedling stopping member 43 is switched between the operating state and the non-operating state by releasing the locking state of the locking portion 43a with respect to the storage hole 31g or the use locking hole 31h, and using the shaft core hole 31e as the shaft center. It is configured to be possible by swinging 43. The locking state of the locking portion 43a with respect to the storage hole 31g or the used locking hole 31h can be released by raising the seedling stopping member 43 as a whole. At this time, the swinging base end portion 43b is prevented from coming off from the shaft core hole 31e by the contact between the locking portion 43c and the shaft core hole 31e. Then, in a state where the operator lifts up the seedling stopping member 43 as a whole, by swinging the seedling stopping member 43 around the shaft core hole 31e, the locking portion 43a can be swung. The seedling stopping member 43 is configured.

In this way, the seedling stopping member 43 is configured to be able to expose the non-acting state by being stored in the side wall portion 31d, and protrudes inward in the lateral direction of the preliminary seedling placing table 31 from the side wall portion 31d. It is configured so that the operating state can be revealed.

As for the seedling stopping member 44, as described based on the seedling stopping member 43, the operator lifts the seedling stopping member 44 as a whole and rocks the seedling stopping member 44 with the shaft center hole 32e as the axis. The seedling stopping member 44 is configured so that the locking portion 44a can be swung by moving. As a result, the seedling stopping member 44 is configured to be able to appear in a non-acting state by being stored in the side wall portion 32d, and to project inward in the lateral direction of the preliminary seedling placing table 32 with respect to the side wall portion 32d. It is configured so that the operating state can be revealed.

When the preliminary seedling placing bases 31, 32 are held in the second state A2 and the mat-like seedlings are placed on the preliminary seedling placing bases 31, 32, the mat-like seedlings may slide off the preliminary seedling placing bases 31, 32. It is considered necessary to prevent In such a case, the mat-like seedlings are inserted into the use locking holes 32h at the front end of the bottom portion 32c by inserting the locking portion 44a of the seedling stopping member 44 on the front end side of the preliminary seedling mounting base 32 into the spare seedling mounting base 32. It is prevented from slipping to the front side of the aircraft. Further, by inserting the locking portion 43a of the seedling stopping member 43 on the rear end side of the preliminary seedling mounting table 31 into the use locking hole 31h on the rear end of the bottom portion 31c, the mat-like seedling is removed from the preliminary seedling mounting table 31. Is also prevented from slipping to the rear side of the aircraft. As a result, the mat-like seedlings can be slid over the two preliminary seedling placing bases 31 and 32, and the possibility that the matting seedlings may slide to the front or rear of the two preliminary seedling placing bases 31 and 32 is prevented.

When the preliminary seedling placing tables 31 and 32 are held in the first state A1 and the mat-like seedlings are placed on one or both of the preliminary seedling placing table 31 and the preliminary seedling placing table 32, the mat-like seedlings are reserved. It is considered necessary to prevent slipping from the seedling placing table 31 or the spare seedling placing table 32. By inserting the locking portions 43a, 43a of both the front and rear seedling stopping members 43, 43 on the preliminary seedling placing table 31 into the use locking holes 31h, 31h at the front and rear ends of the bottom portion 31c, a mat-shaped seedling is prepared. It is prevented that the seedling stand 31 slides back or forth. Further, by inserting the locking portions 44a, 44a of both the front and rear seedling stopping members 44, 44 on the preliminary seedling placing table 32 into the use locking holes 32h at the front and rear ends of the bottom portion 32c, the mat-shaped seedlings are spared. It is possible to prevent the seedling placing table 32 from slipping forward or backward.

[About another composition of the seedling stop member]
The configurations of the seedling stopping members 43, 43 in the preliminary seedling placing table 31 shown in FIG. 2 and the configurations of the seedling stopping members 44, 44 in the preliminary seedling placing stage 32 are the same as those in the embodiment shown in FIG. The configuration is not limited, and the configuration shown in FIG. 13 is also possible.

In the embodiment shown in FIG. 13, a seedling stopping member 61 and a seedling stopping member 62 are provided. The seedling stopping member 61 is provided at the end of the preliminary seedling placing table 31 in the longitudinal direction, and the seedling stopping member 62 is provided at the end of the preliminary seedling placing table 32 in the longitudinal direction.

As shown in FIGS. 13 to 16, recesses 71, 71 are formed in the center in the lateral direction of the bottom portion 31c of each of the front end portion 31a and the rear end portion 31b of the preliminary seedling placing table 31, and the preliminary seedling placing table 32 is formed. Recesses 72, 72 are formed in the center in the lateral direction of the bottom portion 32c of each of the front end portion 32a and the rear end portion 32b. The recesses 71 and 72 are recessed below the bottoms 31c and 32c, respectively. The recess 71 is resin-molded integrally with the preliminary seedling stand 31 by, for example, resin injection molding. Like the recess 71, the recess 72 is also integrally formed with the preliminary seedling placing table 32. The seedling stopping members 61 and 62 are configured so that the seedling stopping members 61 and 62 corresponding to the shapes of the recesses 71 and 72 can enter the recesses 71 and 72 and fall down. In this way, the seedling stopping member 61 is provided on the bottom portion 31c of the longitudinal end portions of the preliminary seedling placing table 31. The seedling stopping member 62 is provided on the bottom portion 32c of the longitudinal end portions of the preliminary seedling placing table 32.

The seedling stopping member 61 is in a standing state in which the free end portion stands up above the bottom portion 31c as an operating state, and in a lying state in which the free end portion is located in the recess 71 below the bottom portion 31c as a non-operating state. It is configured to be switchable. Similarly to the case of the seedling stopping member 61, the seedling stopping member 62 is in an upright state in which the free end portion stands up above the bottom portion 32c in an operating state and the free end portion is lower than the bottom portion 32c in an inactive state. It is configured to be switchable between a lying state in which it is located in the concave portion 72 on the side. Each of the seedling stopping members 61 and 62 in the laid-down state is configured to lay down to the front-rear center side of the preliminary seedling mounting bases 31 and 32.

Hereinafter, the "standing state" means the working state of the present invention, and the "falling state" means the non-working state of the present invention.

Each of the seedling stopping members 61, 61 in the preliminary seedling placing table 31 is configured to be vertically swingable about horizontal axis Q11, Q12 parallel to each other. Further, each of the seedling stopping members 62, 62 of the preliminary seedling placing table 32 is configured to be vertically swingable about horizontal axis Q13, Q14 parallel to each other. The horizontal axis cores Q11 to Q14 shown in FIGS. 14 to 16 are horizontal axis cores Q11 for the seedling stopping member 61 located at the front end portion 31a, and the seedling stopping member 61 located at the rear end portion 31b. On the other hand, a horizontal axis Q12, a horizontal axis Q13 for the seedling stopping member 62 located at the front end 32a, and a horizontal axis Q14 for the seedling stopping member 62 located at the rear end 32b. Is.

The seedling stopping member 61 has a pair of left and right base end portions 61a, 61a, a pair of upright portions 61b, 61b, and a horizontal bridge portion 61c. The pair of left and right base end portions 61a, 61a extend to both sides along the horizontal axis Q11 or the horizontal axis Q12. The pair of standing portions 61b and 61b are bent vertically or substantially vertically from the pair of base end portions 61a and 61a. The horizontal bridging portion 61c laterally bridges over the pair of standing portions 61b and 61b. The seedling stopping member 61 is configured to be switchable between a working state and a non-working state by swinging the base end portion 61a around an axis.

The seedling stopping member 61 is formed in an arch shape by a pair of upright portions 61b, 61b and a horizontal extending portion 61c, and the horizontal extending portion 61c is the free end side of the seedling stopping member 61. A pair of rocking support holes 71a, 71a capable of rocking and supporting the base end portions 61a, 61a about the horizontal axis Q11 (or the horizontal axis Q12) is formed in the recess 71, and a pair of left and right base end portions is formed. 61a and 61a are inserted through the pair of left and right swing support holes 71a and 71a.

A groove 71b and an opening 71c are formed in the recess 71. The groove portion 71b is formed closer to the front and rear center of the preliminary seedling placing table 31 than the laterally extending portion 61c of the seedling stopping member 61 in the lying state. The operator can raise the seedling stopping member 61 to the standing state by putting his/her hand in the groove portion 71b and grasping the laterally extending portion 61c. The opening 71c is a hole for draining water so that water does not collect in the recess 71.

A pair of protrusions 71d, 71d are formed above the swing support hole 71a in the recess 71 so as to sandwich the standing portion 61b in the standing state. Each of the protrusions 71d protrudes two from the left and right center sides of the preliminary seedling placing table 31 above the pair of left and right swing support holes 71a, 71a. Each of the protrusions 71d is formed so as to sandwich the upright portion 61b in the upright state in the lateral direction of the upright portion 61b when viewed in the direction of the horizontal axis Q11 (or the horizontal axis Q12).

When the seedling stopping member 61 swings from the fallen state to the upright state, the left and right upright portions 61b and the protruding portions 71d and 71d facing the upright portion 61b come into contact with each other. Further, the other standing portion 61b on the left and right and the protruding portions 71d, 71d facing the standing portion 61b are in contact with each other. The protrusion 71d is made of resin integrally with the preliminary seedling placing table 31, so that it is elastically deformable. From this, when the worker further swings the seedling stopping member 61 in the standing state, the protrusion 71d is elastically deformed to the outside of the preliminary seedling placing table 31 by the pressing action of the standing portion 61b. Then, when the upright portion 61b is located between the protrusions 71d and 71d in the direction of the horizontal axis Q11 (or the horizontal axis Q12), the protrusions 71d and 71d are respectively elastically deformed. It is restored and the standing portion 61b is sandwiched. Accordingly, after the seedling stopping member 61 swings from the fallen state to the standing state, the seedling stopping member 61 is held in the standing state.

A locking wall portion 71e is formed at an end portion of the concave portion 71 opposite to the side where the groove portion 71b is located. The locking wall portion 71e is configured to be able to contact the pair of upright portions 61b, 61b of the seedling stopping member 61, and the seedling stopping member 61 in the standing state can swing to the side opposite to the side where the groove portion 71b is located. It is regulated by the locking wall portion 71e. In this way, the seedling stopping member 61 is placed in an upright state in which it stands upright above the pair of swing support holes 71a, 71a, and in the front-rear center side of the preliminary seedling placing table 31 rather than the pair of swing support holes 71a, 71a. It is configured so as to be swingable in a laid-down lying state, and swinging from the standing state to the side opposite to the lying state is restricted.

Since the structure and operation of the seedling stopping member 62 and the recess 71 are the same as the structure and operation of the seedling stopping member 61 and the recess 72, detailed description of the seedling stopping member 62 and the recess 71 will be omitted. The pair of left and right base ends 62a, 62a of the seedling stopping member 62 has the same structure as the pair of left and right base ends 61a, 61a of the seedling stopping member 61. The pair of standing portions 62b and 62b of the seedling stopping member 62 have the same structure as the pair of standing portions 61b and 61b of the seedling stopping member 61. The horizontal bridge portion 62c of the seedling stop member 62 has the same structure as the horizontal bridge portion 61c of the seedling stop member 61. The pair of swing support holes 72a, 72a in the recess 72 has the same structure as the pair of swing support holes 71a, 71a in the recess 71, and the pair of left and right base end portions 62a, 62a are the pair of left and right swing support holes 72a. , 72a. The shapes, structures, and functions of the groove 72b, the opening 72c, the protrusion 72d, and the locking wall 72e in the recess 72 are the same as those of the groove 71b, the opening 71c, the protrusion 71d, and the locking wall 71e in the recess 71. The same as the shape, structure, and action of each of.

When the preliminary seedling placing bases 31 and 32 are held in the second state A2 and the mat-like seedlings are placed on the preliminary seedling placing bases 31 and 32, the worker may use the front end portion 32a of the preliminary seedling placing base 32 or the spare. It is conceivable to slide the mat-shaped seedling from the rear end portion 31b of the seedling placing table 31. In such a case, the seedling stopping member 62 at the rear end portion 32b of the spare seedling placing base 32 and the seedling stopping member 61 at the front end portion 31a of the spare seedling placing base 31 are each set in a lying state in advance. Is possible.

Even if the seedling stopping member 62 at the front end portion 32a of the preliminary seedling placing table 32 is in the upright state, the operator slides the mat-shaped seedling from the front end portion 32a and the groove portion 72b is inserted into the seedling stopping member 62. The pressing force acts on the side where is located. Then, the seedling stopping member 62 at the front end portion 32a is configured to be swingable to the lying state against the locking force of the protrusion 72d. Then, after the operator finishes mounting the mat-shaped seedlings on the preliminary seedling mounting table 32, the seedling stopping member 62 at the front end portion 32a is rocked to the upright state so that the seedling stopping member 62 is projected. The position is held in the standing state by the portion 72d. This prevents the mat-shaped seedlings from slipping off the front end portion 32a by the seedling stopping member 62 at the front end portion 32a.

Even if the seedling stopping member 61 at the rear end portion 31b of the preliminary seedling placing table 31 is in the standing state, the operator slides the mat-shaped seedling from the rear end portion 31b to allow the seedling stopping member 61 at the rear end portion 31b. A pressing force acts on 61 on the side where the groove portion 71b is located. The seedling stopping member 61 at the rear end portion 31b is configured to be swingable to the lying state against the locking force of the protrusion 71d. Then, after the operator finishes mounting the mat-shaped seedlings on the preliminary seedling mounting table 31, by swinging the seedling stopping member 61 at the rear end portion 31b to the standing state, the seedling stopping member 61 is The protrusion 71d holds the position in an upright position. This prevents the mat-shaped seedlings from slipping off the rear end portion 31b by the seedling stopping member 61 at the rear end portion 31b.

When the preliminary seedling placing bases 31, 32 are held in the first state A1 and the mat-like seedlings are placed on the preliminary seedling placing base 31 and the preliminary seedling placing base 32, respectively, the worker is It is conceivable that the mat-shaped seedlings are slid not only from the front end portion 32a of 32 but also from the rear end portion 32b. Further, it is conceivable that the operator slides the mat-shaped seedlings not only from the rear end portion 31b of the preliminary seedling placing table 31 but also from the front end portion 31a.

The seedling stopping member 62 at the rear end portion 32b of the preliminary seedling placing base 32 has the same configuration as the seedling stopping member 61 at the rear end portion 31b of the preliminary seedling placing base 31. For this reason, as described above regarding the seedling stopping member 61 at the rear end portion 31b of the preliminary seedling placing table 31, the risk that the mat-like seedlings will slide off the rear end portion 32b is prevented by the seedling stopping member 62 at the rear end portion 32b. The seedling stopping member 61 at the front end portion 31a of the preliminary seedling placing table 31 has the same configuration as the seedling stopping member 62 at the front end portion 32a of the preliminary seedling placing table 32. Therefore, as described above with respect to the seedling stopping member 62 at the front end portion 32a of the preliminary seedling placing table 32, the risk that the mat-shaped seedlings will slide off the front end portion 31a is prevented by the seedling stopping member 61 at the front end portion 31a.

In this way, the seedling stopping member 61 is configured to be able to expose the non-acting state by being stored in the recess 71, and is also configured to be capable of revealing the acting state by projecting above the bottom portion 31c. ing. Further, the seedling stopping member 62 is configured to be able to expose its non-acting state by being stored in the recess 72, and is also configured to be capable of revealing its acting state by projecting above the bottom portion 32c. ..

[Another embodiment]
The present invention is not limited to the configurations illustrated in the above-described embodiments, and representative representative embodiments of the present invention will be illustrated below.

(1) In the above-described embodiment, the concave portion 71 is formed at the center in the lateral direction of the bottom portion 31c in each of the front end portion 31a and the rear end portion 31b, and the concave portion 72 is formed in each of the front end portion 32a and the rear end portion 32b. Although it is formed at the center of the bottom portion 32c in the lateral direction, it is not limited to this embodiment. For example, as shown in FIG. 17, the concave portions 71 may be formed on both sides in the lateral direction of the bottom portion 31c in each of the front end portion 31a and the rear end portion 31b. Further, the recesses 72 may be formed on both sides in the lateral direction of the bottom portion 32c in each of the front end portion 32a and the rear end portion 32b. That is, the four recesses 71, 71, 71, 71 may be formed at the four corners of the bottom portion 31c, and the seedling stopping member 61 corresponding to each recess 71 may be provided. In addition, four recesses 72, 72, 72, 72 may be formed at four corners of the bottom portion 32c, and seedling stopping members 62 corresponding to the recesses 72 may be provided.

(2) The recesses 71 and 72 described in the above embodiment may not be provided. In this case, the seedling stopping member 61 may be provided in the notch 31i shown in FIG. 2 and the seedling stopping member 62 may be provided in the notch 32i shown in FIG. The seedling stopping member 61 may enter the cutout portion 31i so that the lying state appears, and the seedling stopping member 61 stands up from the cutout portion 31i so that the standing state appears. .. Also with respect to the seedling stopping member 62, the lying state and the standing state may be revealed by entering the notch 32i and standing upright from the notch 32i.

(3) In the embodiment shown in FIG. 2 and FIGS. 10 to 12, the shaft core holes 31e, 31e of the vertically oriented shaft core have the front and rear end portions (the front end portion 31a and the rear end portion 31b) of the side wall portion 31d on one side. The vertical axis shaft holes 32e, 32e are formed at the front and rear end portions (the front end portion 32a and the rear end portion 32b) of the side wall portion 32d on one side, but are not limited to this embodiment. For example, the shaft core hole 31e may be formed in the side wall portions 31d and 31d on both sides, or the shaft core hole 32e may be formed in the side wall portions 32d and 32d on both sides. In this case, four shaft core holes 31e, 31e, 31e, 31e may be formed in the side wall portions 31d, 31d on both sides. Further, shaft core holes 31e and 31e may be formed in one side wall portion 31d of the front end portion 31a and the other side wall portion 31d of the rear end portion 31b, respectively. The same applies to the side wall portion 32d and the shaft core hole 32e. The seedling stopping member 43 may be supported by the shaft core hole 31e, and the seedling stopping member 44 may be supported by the shaft core hole 32e.

(4) Each of the seedling stopping members 61 and 62 shown in FIGS. 13 to 16 may be configured to be displaced from the lying state to the standing state without the operation of the operator. For example, a configuration may be adopted in which a torsion spring is wound around the base end portions 61a and 62a, and the seedling stopping members 61 and 62 are urged by the urging force of the torsion spring so as to be in the operating state. For example, even if the operator slides the mat-shaped seedling from the front end portion 31a or the rear end portion 31b (the front end portion 32a or the rear end portion 32b) and the seedling stopping members 61 and 62 swing to the lying state, If the mat-shaped seedlings do not exist on the stopping members 61 and 62, the seedling stopping members 61 and 62 can be swung back to the standing state by the biasing force of the torsion spring. This configuration is particularly useful for the seedling stopping member 62 at the front end portion 32a and the seedling stopping member 61 at the rear end portion 31b. In addition to the torsion spring, an electric motor capable of swinging the seedling stopping members 61 and 62 may be provided.

(5) In the above-described embodiment, the recesses 71, 71 are provided in the lateral center of the bottom portion 31c of each of the front end portion 31a and the rear end portion 31b of the preliminary seedling placing table 31, but the present embodiment is limited to this embodiment. Not done. For example, the recesses 71, 71 may be provided on the side wall portions 31d of the front end portion 31a and the rear end portion 31b of the preliminary seedling placing table 31, respectively. In this case, the horizontal axes Q11 and Q12 may be vertically oriented axes. Further, the recesses 72, 72 may be provided in the side wall portion 32d, and the horizontal axes Q13, Q14 may be vertically oriented axes.

Note that the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments, as long as no contradiction occurs. Further, the embodiments disclosed in the present specification are exemplifications, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within a range not departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be applied to a riding type rice transplanter having a preliminary seedling placing table.

13: Seedling mount 31: Spare seedling mount 32: Spare seedling mount 31a: Front end (longitudinal end of spare seedling mount)
32a: Front end (longitudinal end of the preliminary seedling placing table)
31b: Rear end (longitudinal end of the preliminary seedling stand)
32b: Rear end (longitudinal end of the preliminary seedling placing table)
31c: bottom part 32c: bottom part 31d: side wall part 32d: side wall part 31e: shaft core hole (swing support part)
32e: Shaft core hole (swing support part)
43: Seedling stop member 44: Seedling stop member 61: Seedling stop member 62: Seedling stop member 71: Recess 72: Recess 71a: Swing support hole (swing support)
72a: Swing support hole (swing support part)

Claims (7)

There is a spare seedling stand on which mat-like seedlings to be supplied to the seedling stand can be placed.
The preliminary seedling placing table is in an operation state capable of receiving the mat-like seedlings placed on the preliminary seedling placing table, and the mat stored on the preliminary seedling placing table and placed on the preliminary seedling placing table. A riding-type rice transplanter having a seedling stopping member that can be switched between a non-acting state in which it cannot receive seedlings. The preliminary seedling mounting base is provided with a swing support portion that swingably supports the seedling stopping member,
The riding type rice transplanter according to claim 1, wherein the seedling stopping member is configured to be switchable between the operating state and the non-operating state by swinging the swing support portion around an axis. The riding type rice transplanter according to claim 1 or 2, wherein the seedling stopping member is provided at an end portion in the longitudinal direction of the preliminary seedling placing table. The preliminary seedling placing table has a bottom portion on which the mat-like seedling can be placed, and a pair of side wall portions that stand up from both sides in the lateral direction of the bottom and can receive the mat-like seedling on both sides in the lateral direction. Has,
The riding type rice transplanter according to any one of claims 1 to 3, wherein the seedling stopping member is provided on the side wall portion of an end portion in the longitudinal direction of the preliminary seedling placing table. The seedling stopping member is configured to be able to expose the non-acting state by being stored in the side wall portion, and by projecting inward in the lateral direction of the preliminary seedling placing table with respect to the side wall portion, The riding-type rice transplanter according to claim 4, which is configured so that the operating state can be revealed. The preliminary seedling placing table has a bottom portion on which the mat-like seedling can be placed, and a pair of side wall portions that stand up from both sides in the lateral direction of the bottom and can receive the mat-like seedling on both sides in the lateral direction. Has,
The riding type rice transplanter according to any one of claims 1 to 3, wherein the seedling stopping member is provided on the bottom of the end portion in the longitudinal direction of the preliminary seedling placing table. A recessed portion that is recessed below the bottom portion is formed in the bottom portion,
The seedling stopping member is configured to be able to expose the non-acting state by being stored in the recessed portion, and to be able to expose the acting state by projecting above the bottom portion. The riding type rice transplanter according to claim 6.

Images