JPH10323105A - Seedling planting apparatus of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a whole seedling planting device with sufficient strength (especially to flexural moment in right and left directions) and properly arrange a transmission shaft to a planting case and a transverse feed shaft of a seedling- carrying platform in a seedling planting apparatus of a rice transplanter. SOLUTION: A horizontal frame 5 having long side is arranged in right and left directions and a planting case 6 is connectedly installed in backward cantilever state to the horizontal frame 5. A transmission shaft 34 transmitting power to the planting case 6 is installed over plural planting cases 6 parallel to the horizontal frame 5 and a transverse feed shaft 18 for carrying out reciprocating transverse feed driving of a seedling-carrying platform 7 is arranged parallel to the horizontal frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plurality of planting claws for taking out planted seedlings from the lower end of a seedling rest on which seedlings for planting are placed and planting the seedlings in a field. In addition, the present invention relates to a rice transplanting machine provided with a vertical feeder for each row, which feeds a predetermined amount of a seedling placed toward the planting claw at a lateral movement stroke end of the seedling placing stand.

[0002]

2. Description of the Related Art Conventionally, in the above rice transplanter, as disclosed in, for example, JP-A-62-104505,
A screw shaft is supported horizontally while penetrating the planting transmission case located in the center in the machine body width direction, and both ends of this screw shaft are connected to the seedling rest. By rotating and driving the top member to be fitted to the outside, the engagement between the top member and the reciprocating spiral groove formed on the outer peripheral surface of the screw shaft causes the seedling rest to reciprocate laterally to the left and right. A transmission for switching and changing the rotation speed is provided in the planted transmission case, and the speed change operation member is provided so as to protrude outward from one lateral side of the planted transmission case, and vertically from both left and right sides of the planted transmission case. There has been a configuration in which a driving rotary cam of a feeder is protrudingly provided.

[0003]

However, according to the above-mentioned conventional structure, since the operating member of the transmission of the top member is arranged so as to protrude to one side of the planting transmission case, the planting operation is performed during the planting operation. When the worker inserts his hand on the side of the planted transmission case in order to operate the operating tool, the rotating cam is constantly driven to rotate in the vicinity of this.
Since it is dangerous to touch the hand by mistake, it is necessary to perform the operation carefully, and the operability is poor and there is room for improvement. An object of the present invention is to eliminate the above disadvantages.

[0004]

A feature of the present invention is that in the rice transplanter described at the beginning, a reciprocating spiral groove is formed on one lateral side outward of the planting transmission case located in the middle in the left-right direction. And a frame member fixed to the seedling rest is engaged with the reciprocating spiral groove to constitute the lateral feed mechanism. A rotary shaft is mounted on the rotary shaft by projecting the rotary shaft outward and outward, and a contact arm provided on the seedling mounting side is rotated by the rotary cam at the end of the lateral movement stroke to rotate the vertical feed device. The drive transmission is configured such that a shift operation tool of a transmission mechanism interposed in a drive system for the screw shaft is disposed on a lateral side of the planting transmission case opposite to the screw shaft arrangement direction.

[0005]

[Function] A screw shaft for reciprocating and laterally moving the seedling rest and a rotary cam for driving the feed of the vertical feeding device at the left and right stroke ends of the seedling rest are provided on one side of the planting transmission case. Since it is configured to be deployed in a state that it protrudes outward, there is no rotating member or sliding member that moves back and forth on the side opposite to the screw shaft installation direction in the planting transmission case. Since the operating tool is provided, there is no danger of the rotating body or the like being inadvertently touched by the hand when operating the speed change operating tool, so that the speed change operation can be performed quickly. Moreover, since the screw shaft is disposed outside the case, there is no need to increase the size of the transmission case. Compared to a configuration in which both ends of the screw shaft are connected to the seedling rest, the weight associated with the reciprocal lateral movement of the seedling rest is increased. The load of the bending load on the screw shaft due to the imbalance is reduced.

[0006]

Therefore, the seedling rest can be driven to move laterally by the engaging action between the reciprocating spiral groove of the screw shaft and the top member, and the vertical feed operation can be performed by the contacting action between the rotating cam and the contact arm. Although it can be performed, it is possible to provide a plant that can safely and operably shift the lateral feed speed of the seedling nest without increasing the size of the planting transmission case. Moreover,
The bending load on the screw shaft was reduced, the sliding contact wear with the top member was reduced, and the durability was improved.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows the rear part of the riding type rice transplanter. This rice transplanter is provided with a seedling planting device 2 that can be moved up and down at the rear of a riding type traveling body via a link mechanism 1 and freely rolled left and right around a longitudinal axis.
Are connected. The seedling planting device 2 is formed in a square pipe shape that is disposed over substantially the entire width in a lateral direction in a planting transmission case 4 that is rotatably connected to a pivot boss member 3 of a link mechanism 1 around a longitudinal axis. The frame rod 5 made of an aluminum drawn material is fixedly connected to the frame rod 5, and a plurality of feed cases 6 are fixedly extended rearward in a cantilever shape with an appropriate interval between the frame rod 5 and the frame rod 5. The seedling rest 7 is supported so that it can reciprocate in the horizontal direction. Then, planting mechanisms 8 are arranged on the left and right sides at the rear of the feed case 6, and the seedlings 8a of each planting mechanism 8 take out the seedlings one by one from the lower end of the seedling rest 7 and put them on the field. It is configured to be planted. An endless rotating belt type vertical feeding device 9 with a projection for vertically feeding the seedlings by a predetermined amount toward the planting mechanism 8 at the end of the horizontal movement stroke is provided on each strip seedling mounting surface 7a of the seedling mounting table 7. It is provided. A pivot shaft 11 is supported by a boss 10 formed in each feed case 6, and ground floats 13 are respectively attached to ends of three arms 12 integrally extending from the pivot shaft 11.
Are pivotally connected.

Next, a transmission system for the seedling planting apparatus 2 will be described. As shown in FIG. 2, the transmission shaft 14 and the bevel gear mechanism 15 in the planted transmission case 4
Power is transmitted to the lateral input shaft 16 via the gears, and the input shaft 16 is horizontally supported by the planting transmission case 4 via the gear-type transmission mechanism 17 and projects laterally outward on the left side of the case 4. The power is transmitted to the disposed screw shaft 18. The outer end of the screw shaft 18 is supported by a bracket 19 fixedly extended from the frame rod 5. As shown in FIGS. 1 and 3, a reciprocating spiral groove 20 is formed on the outer peripheral surface of the screw shaft 18, and a cylindrical member 22 having a frame member 21 engaged with the spiral groove 20 is externally fitted. A connecting tool 24 connected and fixed to the rear surface of the seedling rest 7 via a fixed bracket 23 is inserted and connected to the cylindrical member 22 so as to move integrally with the tubular member 22 and is prevented from coming off by the pin 25, and the screw shaft 18 is stopped.
The lateral feed mechanism A is configured so that the seedling stand 7 is reciprocated and laterally moved at a predetermined pitch by the engagement action of the spiral groove 20 and the top member 21 with the rotation of. In addition, power is supplied from the input shaft 16 to a lateral rotation shaft 27 via a gear transmission mechanism 26. This rotating shaft 27 is a screw shaft 18
In the same manner as described above, the case 4 is supported horizontally on the planting transmission case 4 and is disposed so as to protrude laterally outward on the left side of the case 4 so that the bracket 28 supports the outer end. A pair of left and right rotary cams 29 is attached to the rotary shaft 27 at an intermediate portion thereof. The rotary cam 29 is provided at the end of the horizontal movement stroke of the seedling mounting table 7 with the contact arm 30 linked to the vertical feed device 9. By contacting and swinging, the endless rotating belt 9a with projection is rotated by a predetermined amount to vertically feed the placed seedling by a predetermined amount. The contact arm 30 is biased by a spring so as to bias the arm 30 to return to a predetermined standby position. Also, the relay horizontal shaft 32 is configured to be rotationally driven from the rotary shaft 27 via the transmission chain 31, and from the relay horizontal shaft 32 to the input shaft 34 of each feed case 6 on the outer side of the planting transmission case 4. A power transmission system is configured so that power is transmitted and transmitted to each planting mechanism 8 via a chain transmission mechanism (not shown) arranged in each feed case 6. And
The operating tool 36 of the transmission mechanism 17 with respect to the screw shaft 18 is disposed on the side opposite to the side on which the screw shaft 18 is provided in the planting transmission case 4, that is, on the right side laterally outward. This transmission mechanism 17
As shown in FIG. 2, a plurality of drive gears 37 having different diameters are idlely fitted to the input shaft 16, and a plurality of driven gears 38 meshing with the respective drive gears 37 are integrally rotatable on the screw shaft 18. A shift key 39 which is externally fitted and which can be freely shifted in the axial direction and selectively engageable with each drive gear 37 is provided inside the input shaft 16. And the operating tool 3
6, the shift key 39 is slidably operated to selectively rotate one of the drive gears 37 having different speed ratios together with the input shaft 16 to perform a speed change operation. Further, on the side of the planting transmission case 4 where the operating tool 36 is provided, the pivoting shaft 11 is rotated to change the fulcrum position of the ground float 13 and the planting depth by the planting claw 8a is changed and adjusted. Planting depth adjustment lever 4
0 is provided.

In place of the pair of left and right rotating cams 29, one rotating cam is provided, and two contact arms 30 on the seedling stand side are provided on the left and right sides. The arm may be configured to be contacted and rotated by a rotating cam.

[0010] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a partially cutaway rear view of a seedling planting apparatus.

FIG. 2 is a cutaway rear view showing a transmission system.

FIG. 3 is a rear view showing a lateral feed mechanism.

FIG. 4 is a side view of the rear part of the rice transplanter.

[Explanation of symbols]

 Reference Signs List 4 seedling transmission case 7 seedling rest 7a seedling mounting surface 8a seedling claw 9 vertical feed device 17 speed change mechanism 18 screw shaft 20 screw groove 21 top member 27 rotation shaft 29 rotation cam 30 contact arm 36 operation tool A side feed mechanism

Claims (2)

[Claims] 1. A plurality of planting cases (6) provided with a planting mechanism (8) at a rear portion thereof, in which a laterally long horizontal frame (5) is arranged along a left-right direction and a seedling is planted on a rice field, is parallel to each other. And a transmission shaft (34) for transmitting power to the plurality of planting cases (6) is connected to the lateral frame (5). ) In parallel across the plurality of planting cases (6), and a transverse feed shaft (18) for driving the seedling rest (7) to reciprocate in the left-right direction in parallel with the transverse frame (5). Seedling planting equipment of rice transplanter located in. 2. The seedling planting apparatus for a rice transplanter according to claim 1, wherein the planting case (6) is directly attached to and supported by the horizontal frame (5).