JP3321507B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling-planting device mounted on a traveling machine, comprising at least a divided seedling-mounting base and a seedling-planting mechanism for taking out seedlings from the divided seedling-mounting base. With the divided seedling planting device section, the left and right divided seedling planting apparatus section is rocked around each left and right rotation fulcrum, and the divided seedling mounting base section is in the working posture along the machine body left and right direction, The present invention relates to a rice transplanter configured such that the divided seedling mounting portion can be switched to a storage position along the longitudinal direction of the machine.

[0002]

2. Description of the Related Art The above-described rice transplanter has an advantageous structure in which the width of the entire machine body can be made smaller in the retracted position along the longitudinal direction of the machine than in the working position. Even in a rice transplanter having such a configuration,
For example, as disclosed in Japanese Patent Application Laid-Open No. 6-292419, it is desirable to equip the seedling planting apparatus with a rolling mechanism. The rolling mechanism is configured such that the seedling planting device is configured to be freely rollable with respect to the traveling machine body, and the sliding member belonging to the traveling machine body and the left and right divided seedling planting device sections are respectively provided with left and right return springs. And the forcible rolling operation of the seedling planting device is performed in the moving direction by moving the sliding body to the left or right from the reference position.

[0003]

By the way, if a rolling mechanism on the premise of such an undivided seedling planting apparatus is applied to a divided-type seedling planting apparatus, the divided seedling planting apparatus section will be in a working posture and stored state. Since the posture is changed between the posture and the posture, the locking portion of the return spring that is bridged between the sliding body belonging to the traveling machine and the divided seedling planting device that changes the posture is not rationally selected. This causes inconvenience when changing the posture.

An object of the present invention is to perform a rolling operation by selecting a linked portion between a divided seedling planting device and a return spring in consideration of a change in the attitude of the divided seedling planting device. Even in this case, it is an object of the present invention to provide a rice transplanter capable of smoothly changing the posture of the divided seedling planting device.

[0005]

According to a feature of the present invention, in the working posture, the seedling-planting device is configured to be freely rollable with respect to the traveling machine body.
The sliding body belonging to the traveling machine body and the left and right split seedling planting device sections are connected by left and right return springs, respectively, and the seedling planting apparatus is moved in the moving direction by moving the sliding body to the left or right from the reference position. The configuration is such that the forced rolling operation is performed, and the connection portion of the return spring with the left and right divided seedling planting device portions is set at the rotation fulcrum position. The operational effects are as follows. .

[0006]

In other words, since the connecting portion of the return spring with the left and right divided seedling planting units is set at the rotation fulcrum position, the divided seedling planting unit is rotated when the posture is changed. Even if it rotates about the fulcrum, the change of the connection part can be reduced.For example, when the connection part is set to a specific part of the divided seedling planting apparatus part away from the rotation fulcrum, the linkage part is displaced. It is possible that the change in the posture of the divided seedling planting device such as the change in the length of the return spring is not smooth.However, in the present invention, this point can be resolved, and the posture of the divided seedling planting device is changed. It can be done smoothly.

[0007]

According to the present invention, the return spring can be smoothly changed to the storage position by a rational structure in which the linking portion of the return spring corresponds to the split-type seedling planting device.

[Other Objects, Configurations, Functions, and Effects] (1) The object of the present invention in claim 2 is to provide a structure in which the mounting structure of the connection release tool can be strengthened in addition to the object of the invention in claim 1. The configuration adopted for this purpose is, in the configuration according to claim 1, provided with a frame member rotatable around a pivot axis with respect to the traveling body, and a pivoting end portion of the frame member. The rotation fulcrum is formed, and while rotating the divided seedling planting device around the rotation fulcrum, it is configured to revolve around the oscillating axis. It is as follows.
In other words, while the two split planting devices have a complicated configuration in which they revolve while rotating, the locking position of the return spring with respect to the split seedling planting device is determined by the swing axis as the revolving axis. Is provided at the position of the rotation fulcrum that maintains a certain length, so that there is not much change in the installation length of the return spring spanned over the sliding member and the rotation fulcrum, and the working posture without removing the return spring. The posture can be changed smoothly from the storage posture to the storage posture.

(2) An object of the invention according to claim 3 is to provide a rice transplanter capable of appropriately operating a return spring in addition to the object of the invention according to claim 2, and a configuration adopted for this purpose. In the configuration according to claim 2, in the working posture, the sliding body and the turning fulcrum are positioned on a line arranged in a lateral direction of the machine body, and the swinging body is moved to an intermediate position between the sliding body and the turning fulcrum. In a state in which the pivot point is positioned and the pivot point is rotated around the pivot axis to switch to the retracted position, the pivot point is located on the rear side of the pivot axis with respect to the body. The configuration and the operation and effect are as follows. In other words, the extension length of the return spring is the longest since the connecting portion, the rotation fulcrum, and the pivot axis are aligned substantially in a straight line in the working posture, and the connecting portion becomes longer as the retracted posture becomes. Shorter because it is closer to the core. As a result, in the storage position where the urging force is not required, the return force is not applied, and can be applied only in the required work position.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an engine 4 is mounted on a front part of a traveling body 3 provided with a driving type front wheel 1 and a driving type rear wheel 2, which are operated by steering. A hydrostatic continuously variable transmission (HST) 5 to which power from the engine 4 is transmitted and a transmission case 6 are arranged, and a driver's seat 7 is arranged at the center of the traveling body 3.
A seedling planting apparatus A is connected to a rear end of the traveling machine body 3 via a link mechanism 9 driven up and down by a hydraulic cylinder 8 to form a riding type rice transplanter. On the right side of the driver's seat 7, there is provided an elevating lever 10 for controlling the raising and lowering of the seedling planting device A and performing the on / off operation of the planting clutch. On the left side of the driver's seat 7, the continuously variable transmission 5 is operated. The speed change lever 11 is provided.

The seedling placement apparatus A places the mat-shaped seedlings W thereon, and the seedling placing stand 13 whose upper end is inclined forward of the traveling machine body 3, and the transmission case 6 via the transmission shaft 12. A pair of left and right transmission cases 14, 14, to which power is transmitted,
A rotary case 16 that is rotated by power transmitted from the transmission case 14 via a chain case 15, a pair of planting arms 17 provided in the rotary case 16,
It is equipped with a plurality of leveling floats 18 and is configured for eight-row planting, and is provided with a fertilizer application device 19 having a hopper, a feeding mechanism, a groove producing device, and the like. Arm 17 for planting seedlings from the lower end of seedling W
At the same time, the plants are cut out and planted in the field scene, and at the same time, the fertilizer 19 is supplied to the field scene near the planted seedlings.
A seedling planting mechanism is constituted by the rotary case 16, the planting arm 17, and a system for driving these.

As shown in FIGS. 2 to 5, in this rice transplanter, the seedling planting apparatus A is configured so as to be divided into two sections of four at the left and right central positions. , A
R is rotatably supported around the first shaft center X1 in the vertical position with respect to the frame member 20 constituting the divided seedling planting apparatus portions AL and AR. The frame member 20 is rotatably supported around a second axis X2 in a vertical position with respect to the main frame 21 provided, and as shown in FIG. With the posture set, the upper ends of the first axis X1 and the second axis X2 are inclined in the direction toward the front side of the traveling body 3 with respect to the vertical direction.

The link mechanism 9 comprises a top link 9T disposed at an upper portion and a lower link 9L disposed at a lower portion. The link mechanism 9 is connected to a rolling boss 22 connected to a lower end portion of a vertical frame 9A supporting a rear end thereof. The connecting plate 23 can be freely rolled around the rolling axis Y in the front-back posture.
And the main frame 21 composed of an upper plate 21A and a lower pipe 21B with respect to the connecting plate 23.
And a round pipe shape for a boss member 20A rotatably fitted to a second shaft 24 disposed coaxially with the second shaft core X2 at both left and right ends of the main frame 21. A frame member 20 is fixedly mounted to rotatably support the frame member 20 around the second axis X2, and the outer ends of the respective frame members 20, 20 are coaxial with the first axis X1. The support frame 27 in the form of a square pipe is mounted on the first shaft 25 via
The support frame 2 is rotatably supported around the axis X1.
7 and the right and left transmission cases 14 and the chain case 15 are fixed to each other.
Left and right sliding rails 28, 28 that support the seedling mounting table 13 are provided on the upper surfaces of the pair of chain cases 15, 15 of L and AR, respectively.

As shown in FIG. 4, the left transmission case 14
The screw 29 which is rotationally driven by the power of
And the bearing member 30 at the end of the support frame 27 on this side, and the moving force of a top (not shown) engaging in the spiral groove of the screw shaft 29 is applied to the left divided seedling. A moving member 31 for transmitting the seedlings to the placing table 13L is provided to constitute a lateral feed mechanism of the seedling placing table 13. The left and right divided seedling mounting portions 13L and 13R of the seedling mounting base 13 are each connected to a connecting member D (FIG. 1).
1, see FIG. 12), the power from the lateral feed mechanism reciprocates in the horizontal direction on the slide rails 28, 28 integrally.

A shaft (not shown) to which power from the transmission shaft 12 is transmitted to the rolling boss 22 is rotatably supported coaxially with the rolling shaft Y. FIG.
As shown in (a) and (b), the power of this shaft is transferred to a bevel case 32 and a pair of output shafts 3 provided in the bevel case 32.
3, 33, a transmission mechanism for transmitting to the left and right transmission cases 14 and 14 via the clutch mechanism 34 and the intermediate shaft 35, respectively. The clutch mechanism 34 includes a clutch shaft portion 34A formed in a spline shape at the end of the intermediate shaft 35, a shift member 34B fitted to the output shaft 33 so as to be detachable from the clutch shaft portion 34A and slidably movable on the output shaft 33, This shift member 34
And a spring 34C for urging B toward the clutch shaft 34A.

In the clutch mechanism 34, the clutch shaft 34A and the shift member 34B are engaged with each other only in a specific rotation phase during the on-coming operation, and as shown in FIG. By the separation from 34B,
The intermediate shaft 35 and the output shaft 33 of the bevel case 32 are configured to be completely separated. The bevel case 32 is provided with a power transmission system having a bevel gear (not shown) so that the power from the traveling machine body is branched and output to two output shafts 33, 33. It is supported to maintain a lateral orientation with respect to the system and is configured with a universal joint.

As shown in FIGS. 7 to 9, the second shaft 24 is provided so as not to rotate with respect to the main frame 21, and the first shaft 25 is provided so as not to rotate with respect to the frame member 20. Second shaft 24
At the upper position of the second axis X2 and the main sprocket 3 at the same axis.
6 and the second shaft 24 at the upper end position.
A plate-shaped rotating member 37 is provided so as to be rotatable around the axis X2. In addition, the bracket 26 is supported rotatably with respect to the first shaft 25, and the first shaft core X is rotated so as to integrally rotate the hollow extension shaft 53 with respect to the bracket 26.
1 and a driven sprocket 38 having half the number of teeth of the main sprocket 36 is disposed on the extension shaft 53, and a chain 39 extends between the main sprocket 36 and the driven sprocket 38. Has been wound.

The left and right rotating members 37, 37 are arranged at a higher level than the left and right frame members 20, 20, respectively.
The frame members 20, 20 are connected and fixed via the rods 40, 40 in a suspended posture so as to rotate in conjunction with the rotational power of the frame members 20, and the left and right rotating members 37, 37 are rotated in opposite directions. , A pair of wires 4 in a crossed posture between each
4,44 are stretched. Further, a sector gear 41 arranged coaxially with the second shaft core X2 on the left side is fixed to the frame member 20 side, and a pinion gear 42 that meshes with the sector gear 41 is provided on the main frame 21 side. An electric motor 43 for driving is provided.

The rod 40 is provided with a turnbuckle 40A at an intermediate portion thereof, and has a rotating member 37 at one end.
And the other end is screw-connected via a support member 45 fixed to the frame member 20, and the rod 40 is linearly inclined with the rotating member 37 and the frame member 20. By connecting between them, the strength is improved as a form in which the frame member 20 is suspended from the rotating member 37. In addition, a length adjusting section 44A for adjusting the length in a screw type is provided at an intermediate portion of the wire 44.

With such a configuration, when the seedling planting device A is stored, the connection of the connecting member D is released by raising the seedling planting device A to a level away from the ground, and disconnecting the right side. The divided seedling mounting base 13R is artificially moved to the right moving end, and the movement of the divided seedling mounting base 13R on the slide rail 28 is prevented by locking means (not shown) (in this state, FIG. 9 and the left and right split seedling rests 13R,
The spacing between each of the 13L amounts to about 30 centimeters).

Next, as shown in FIG. 8, the clutch mechanism 34 is artificially separated, and the electric motor 43 is operated by a predetermined operation.
, The sector gear 41 is rotated, and the rotation of the sector gear 41 causes the left frame member 20 to rotate. Due to the rotation of the left frame member 20, the left rotating member 37 connected by the rod 40 rotates, and the rotation of the left rotating member 37 is transmitted to the right rotating member 37 via the wire 44, and the clockwise rotation thereof is performed. The moving member 37 rotates, and the rotation causes the right frame member 20 to reversely rotate. That is, the respective frame members 20, 20 are interlocked by the forces from the left and right rotating members 37, 37 and the pair of wires 44, 44, and the second shaft X
2 and X2, the outer end of which rotates toward the rear side, and at the same time, the main sprocket 36 and the system supported by the brackets 26 and 26 around the first axes X1 and X1 Due to the force from the sprocket 38 and the chain 39, the rotation direction of the frame members 20, 20 is opposite to the rotation direction of the frame members 20, 20 at a speed twice as high as the rotation speed of the frame members 20, 20. To the side toward.

As shown in FIG. 13, when rotating to the storage position, the upper corners 13E, 13E of the left and right divided seedling mounting portions 13L, 13R approach, but the divided seedlings are placed in a plan view. Since the pedestals 13L and 13R rotate at positions separated from each other, they can be rotated while avoiding contact with the respective corners 13E and 13E. Also, the separation of the clutch mechanism 34 and the expansion and contraction of the intermediate shaft 35 can be performed. And this rotation is allowed.

When the divided seedling planting units AL and AR reach the storage position, the driving of the electric motor 43 is stopped (control operation is not described in detail), and storage is completed. In this state, FIG.
As shown in FIG. 4, left and right divided seedling mounting portions 13L, 13
At the position where R is on the sliding rails 28 and 28 and close to the side of the traveling body 3, the upper end edges thereof reach a posture in which they are parallel to each other, so that the weight of the entire seedling planting apparatus A is shifted to the side of the traveling body 3. In addition to improving the weight balance of the rice transplanter as a whole,
The size of the seedling planting device A in the horizontal direction is reduced.

Further, in this retracted position, the divided seedling mounting portions 13L and 13R are switched to the standing position as shown in FIG. 16 by the rotation about the first axis X1 in the inclined position as described above. The lateral size of the seedling planting apparatus A is further reduced, and the rotation of the frame member 20 around the second axis X2 in the inclined posture as described above causes the divided seedling planting plant A to rotate as shown in FIG. As a result of raising the rear side of the traveling body 3 of the device units AL and AR upward, it is possible to reduce the dimension in the front-rear direction in plan view, and to further move the center of gravity of the entire rice transplanter forward to improve the weight balance. At the same time, the rear end of the seedling planting device A in the stowed posture is not brought into contact with the ground during traveling.

When the seedling planting apparatus A in the retracted position is restored to the working position, the divided seedling planting units AL and AR are rotated in the opposite direction by rotating the electric motor 43 in the reverse direction. As a result, the posture of the seedling planting device A in the retracted posture is changed to the working posture by the operation opposite to the above, and when the posture of the seedling planting device A reaches the posture shown in FIG. The driving is stopped (the control operation is not described in detail), the clutch mechanism 33 is connected, and the right divided seedling mounting portion 13R on the right side is set.
To the left side of the divided seedling mounting base 13L.
By connecting the L and 13R with the connecting member D, a state where the work can be performed is reached.

Next, the rolling control of the seedling planting apparatus A will be described. As shown in FIG. 2, left and right vertical frames supporting the seedling mounting table 13 are erected, and the vertical frames extend the above-described extension shaft 53. The driven sprocket 38 is fixed to the left and right vertical frames 53, 53 as described above. On the other hand, as shown in FIG. 3 and FIG.
A, a support bracket 46 is erected integrally, a helical shaft 47 is erected on the support bracket 46, and a guide rod 48 is erected on the helical shaft 47 in parallel with the helical shaft 47 so that a sliding body 49 is attached to the helical shaft 47. The sliding member 49 is configured to be movable left and right by cooperating with each other via a top member (not shown). One end of the linking rod 50 is hooked and locked to the bracket 49A of the sliding body 49, and a hook is locked in a locking hole formed in the other end of the linking rod 50 to return the return spring 51.
In addition, the other end of the return spring 51 is locked to a bracket 53A fixed to the vertical frames 53, 53. By moving the sliding body 49 left and right by such a configuration, the vertical frame 5 is moved in the moving direction.
By pulling 3,53, the seedling planting apparatus A is configured to perform a rolling operation around the axis Y. In the figure, reference numeral 52 denotes a rolling motor that drives the spiral shaft 47 to rotate.

A bracket 53 is attached to the left vertical frame 53.
B is extended, and the bracket 53B is provided with a gravitational inclination detecting means 54 for detecting the left-right inclination with respect to the horizontal reference plane of the seedling planting apparatus A. The rolling motor 52 is driven based on a command from a control device equipped with a microcomputer so that the inclined posture is set to the set posture to drive the sliding body 49 and swing the seedling planting apparatus A in the driving direction. It is configured to perform rolling control.

In the working posture, the locking portion of the linking rod 50 with respect to the sliding member bracket 49A and the first axis X1 as the rotation fulcrum are set so as to be substantially aligned in the lateral direction of the machine body. The second axis X2 is set between the first axis X1 and the first axis X1, and the left and right divided seedling planting units AL and AR are rotated around the first axis X1 in this state. It is revolved around the two-axis core X2 to be in the storage posture. In the retracted position, the first axis X1, X1 is configured to be located on the rear side of the body of the swing axis X2, X2. With such a configuration, the extension length of the return spring 51 becomes shorter as it is switched to the storage posture side with a length near the longest in the operation posture.

[Another Embodiment] In addition to the above-described embodiment, the present invention can be configured so that the storing operation of the seedling planting apparatus is performed manually, for example. It is also possible to apply to an apparatus. Regarding the installation of the return spring 51, the return spring 51
It is possible to adopt a configuration in which only the connecting rod 50 is interposed and the connecting rod 50 is not interposed. The return spring 51 is linked to the pivot fulcrum X1 and is hooked and locked on a bracket 53A extending from the vertical frame 53.
A locking hole for the return spring 51 of 3A may be provided. The configuration for switching the postures of the divided seedling planting apparatus units AL and AR may be performed only by rotation around the rotation fulcrum X1. This facilitates the configuration of the link mechanism for rotation.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall side view of a rice transplanter.

FIG. 2 is a front view showing a rolling drive structure.

FIG. 3A is a plan view showing a state of a return spring in a working posture. (B) A plan view showing a state of a return spring in a retracted posture.

FIG. 4 is a plan view of a transmission system of the seedling planting apparatus in a working posture.

FIG. 5 is a plan view of the transmission system of the seedling plant in the retracted position.

FIG. 6A is a rear view of the clutch mechanism in the on state, and FIG. 6B is a rear view of the clutch mechanism in the off state.

FIG. 7 is a plan view of a storage unit for a working posture.

FIG. 8 is a plan view of storage means in a storage position.

FIG. 9 is a partially cutaway rear view of the main frame and the frame member.

FIG. 10 is a side view showing a posture of a first shaft center and a second shaft center.

FIG. 11 is a plan view of the rice transplanter showing a working posture.

FIG. 12 is a plan view of a rice transplanter in a state where a seedling mounting table is divided.

FIG. 13 is a plan view of a rice transplanter obtained by dividing and turning a seedling planting device.

FIG. 14 is a plan view of a rice transplanter in which the seedling planting device is set in a retracted position.

FIG. 15 is a side view of the seedling planting device in a stored state.

FIG. 16 is a rear view of the seedling plant in a stored state.

[Explanation of symbols]

 Reference Signs List 3 traveling machine body 13L, 13R divided seedling mounting base 20 frame member 49 sliding body 51 return means A seedling planting device AL, AR divided seedling planting device portion X1 rotation fulcrum X2 swing axis

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01C 11/02 350-366 A01C 11/02 320 A01B 73/06

Claims (3)

(57) [Claims] 1. A method according to claim 1, wherein the seedling planting device (A) attached to the traveling machine body (3) is divided into at least divided seedling mounting tables (13L), (1).
3R) and left and right split seedling planting units (AL), (AR), each of which comprises a seedling planting mechanism for taking out seedlings from the divided seedling mounting bases (13L), (13R). The left and right divided seedling planting units (AL) and (AR) are oscillated around the respective left and right pivots (X1) and (X1) so that the divided seedling mounting bases (13L) and (13R) are rotated. The working posture along the machine body left-right direction, and the divided seedling mounting base (13L),
(13R) is a rice transplanter configured to be switchable between a stowed position along a longitudinal direction of the machine, wherein the seedling planting device (A) is rolled with respect to the traveling machine (3) in the working position. A sliding body (49) operable and belonging to the traveling machine body (3);
And the left and right divided seedling planting units (AL) and (AR) are connected by left and right return springs (51), respectively.
9) The seedling planting device (A) is configured to be forcedly rolled in the moving direction by moving the seedling planting device (A) to one of the left and right sides from the reference position, and the left and right split seedling planting device portions ( A rice transplanter in which a connection portion between (AL) and (AR) is set at the pivot points (X1) and (X1). 2. A frame member (2) that is rotatable around swing axes (X2) and (X2) with respect to the traveling body (3).
0) and (20), and the pivotal fulcrum (X) is provided at the tip of the swing of the frame members (20) and (20).
1) and (X1), and the divided seedling planting device (A)
2. The apparatus according to claim 1, wherein L) and (AR) revolve around the pivot axes (X2) and (X2) while rotating around the pivots (X1) and (X1). 3. Rice transplanter. 3. The sliding body (4) in the working posture.
9) and the rotation fulcrum (X1) are located on a line arranged in the lateral direction of the machine body, and the swing axis (X2) is located at an intermediate position between the sliding body (49) and the rotation fulcrum (X1). And the rotation fulcrum (X1) is moved to the swing axis (X2).
3. The rice transplanter according to claim 2, wherein, in a state where the rotation fulcrum is switched to the storage position by rotating around, the rotation fulcrum (X <b> 1) is positioned behind the swing axis (X <b> 2). .