JPH082202B2 - Walk-behind rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the Invention [Field of Industrial Application] The present invention relates to a structure of a planting part frame in a rice transplanter.

[Prior Art] A planting part frame that doubles as a transmission case is provided in the planting work part of the rice transplanter, and a lateral movement device that reciprocates the seedling table that holds the seedlings to the left and right is provided in this frame. A planting device for planting seedlings on the seedling table is installed. The power from the engine side is transmitted to the lateral movement device and the planting device via a transmission mechanism in the frame.

The planting part frame of the above conventional rice transplanter has a one-box shape in which a power transmission part to the lateral movement device and a power transmission part to the planting device are integrally formed.

[Problems to be Solved by the Invention] Therefore, in the above-mentioned conventional rice transplanter, the clutch operating wire, the hydraulic valve operating wire, and the like must be provided so as to bypass the side portion of the transmission case. In addition to the restriction on the design, a large number of guide fittings for guiding the wires are required, which increases the number of parts and the weight and makes the assembly difficult.

It is an object of the present invention to provide a structure of a planting part frame which is advantageous in terms of the overall structure of a rice transplanter in which an operating wire or the like can be effectively arranged.

(B) Structure of the Invention [Means for Solving the Problems] In order to achieve the above-mentioned problems, the present invention has the following structure.

That is, the walk-type rice transplanter according to the present invention is a walk-type rice transplanter in which a planting section frame that incorporates a seedling mounting table and a transmission mechanism for a planting device is provided on the front side of the seedling mounting table. A lower housing provided with a planting shaft for mounting and driving the planting device, an upper housing provided with a lead cam shaft for laterally reciprocating the seedling mounting table, and the planting shaft connecting the both housings vertically. A hollow connecting portion that incorporates a transmission mechanism that interlocks with the lead cam shaft is provided, and the hollow connecting portion is offset to one of the left and right sides to provide a space portion that passes forward and backward in the left and right center of the planting frame. It is characterized by that.

[Operation] Since a space for passing back and forth is provided in the center of the planting frame on the left and right, wires for operation can be passed back and forth, facilitating assembly and maintenance, and shortening the wire length. can do.

[Example] The agricultural working machine in the illustrated example is a walk-type fertilizer rice transplanter with two rows of plants. In this fertilizer transplanter 1, an engine 3 is arranged in the front part of a mission case 2, and chain cases 5, 5 are provided on the side of the mission case 2 so as to be rotatable around the base part thereof. The chain case is extended slightly upward to the rear, and the trailing wheels 6 and 6 that are the grounding wheels that support the body at the rear end.
Is attached. A center frame 7 having a substantially horizontal front portion and a warped rear portion is fixedly connected to the rear surface of the mission case 2. The fertilizer application device 9 is attached to the bracket 7a fixed to the front part of the center frame 7, and the planting part frame 10 also serving as the transmission case of the planting work part 1a is attached to the bracket 7b fixed to the middle part. . A lateral movement device 13 and a planting device 14 for the seedling table 11 are attached to the planting part frame 10.
Since the planting part frame 10 is attached by the bolts 25, ..., It is removable. Further, the rear end of the center frame 7 has a U-shaped handle rod 15 in a horizontal view.
And the operation box 16 are integrally attached. The seedling mounting table 11 includes rails 17 and 17 'provided on the center frame 7.
A belt conveyer type seedling feeding device 18 for slidably supporting the seedlings in the left-right direction and for intermittently transferring the seedlings downward is provided at the lower part thereof. A float 22 having a rear portion rotatably supported by a support shaft 20 and a front portion movably supported by a variable length link 21 is provided on the lower side of these machines.

The planting part frame 10 is formed by connecting an upper housing 10a and a lower housing 10b with a hollow connecting part 10c, and is formed in a U shape as a whole in rear view. Therefore, in the center of the planting part frame 10, an internal space 26 is formed which opens in the front and rear and communicates with the external space on the left side surface part. And
A plurality of wire holders 27, ... Are arranged side by side on the upper surface of the lower housing 10b facing the internal space 26, and operation wires 28 ,. Handle bar 15 at the rear of the machine
And the operating lever 29 provided on the operating box 16,
And the traveling section 1b at the front of the machine and the hydraulic device
Since they are connected in a straight line in plan view by 8, ..., The length of the wire is short, and the number of guide metal fittings for guiding the wire can be reduced as much as possible.

The transmission shaft 30 extending from the mission case 2 is fitted into the lower housing 10b passing above the center frame 7, and the rotational power of the transmission shaft is applied to the planted shaft 32 supported by the bearings 31 and the bevel gear 33. , 34. A fixed position stop clutch 35 is interposed between the planting shaft 32 and the bevel gear 34, and when the rotation of the transmission shaft 30 stops, the planting shaft 32
Will stop at a fixed position. Cranks 37, 37 are attached to both left and right ends of the planting shaft 32, and a planting rod 40 is supported by the crank 37 and a link 38 attached to the lower housing 10b. When the planting shaft 32 rotates, the planting claw 40a of the planting rod 40 draws a predetermined locus and moves up and down, so that the seedlings supplied to the predetermined position of the seedling stand 11 are planted in the field scene. Has become.

The rotational power of the planting shaft 32 is transmitted to the counter shaft 43 provided below the upper housing 10a by the chain 42 stretched in the connecting portion 10c. The gear 45 attached to one end of the counter shaft 43 projects from the side surface of the connecting portion 10c.
The gear 47 of the TO shaft 46 meshes with the gear 49 attached to the other end of the TO shaft 46 meshes with the gear 51 of the lead cam shaft 50 supported in the upper housing 10a.

In the upper housing 10a, the lead cam shaft 50,
A moving shaft 53 and a driven cam shaft 54 are provided. The lead cam shaft 50 is a shaft in which clockwise and counterclockwise spiral lead grooves 56 are formed on the outer peripheral portion, and a cam 57 is fitted to an end portion on the opposite side to the side where the gear 51 is attached, and a bearing 58 is provided. It is rotatably supported by 58. The moving shaft 53 is slidable in the axial direction, and both ends protruding outside the housing are seedling mounts.
It is fixed to both sides of the bottom of 11. A claw that fits over the lead cam shaft 50 and engages with the lead groove 56 at the center of the moving shaft 53.
A lead metal 61 having 60 is attached. Further, the driven cam shaft 54 is provided so as to be rotatable in the circumferential direction and movable in the axial direction, and a pair of driven cams 63, 63 'engaging with the cam 57 are attached. The driven cams 63, 63 'are movable in the axial direction, and are separated from each other by a spring 64 interposed therebetween. And the driven camshaft
An arm for operating the seedling feeder 18 is provided at the outer end of 54.
66 is fixed, and a fixed metal 67 is attached to the end of the moving shaft 53.

When the lead cam shaft 50 rotates, the lead claw 60
Since it moves along 56, the moving shaft 53 moves in the left-right direction together with the seedling stand 11. When the moving shaft 53 reaches the end portion of the left and right strokes, for example, when it reaches the left end of the left and right strokes as shown in FIG. 2, the lead metal 61 pushes the driven cam shaft 54 to the left side, and therefore the cam 57 and the driven cam 63. Engage with to rotate the driven cam shaft 54. Then, the seedling feeding device 18 is activated by the arm 66, and the transfer belt of the seedling feeding device is rotated and moved by one row of seedlings in the downward feeding direction. Further, when the moving shaft 53 reaches the right end of the left and right strokes, the fixed metal 67 pushes the driven cam shaft 54 to the right side, and this time, the cam 57 and the driven cam 63 '.
And engage to rotate the driven cam shaft 54 as described above,
The transfer belt is rotated and moved in a predetermined direction by a predetermined amount.

The fertilizer application device 9 includes a hopper 70, a feeding unit 71, and a feeding pipe 72, and rotational power is transmitted from the PTO shaft 46 to the feeding roll 73 of the feeding unit.

The rice transplanter 1 is equipped with a machine body elevation control mechanism configured as follows.

A hydraulic device 82 having a pitching valve 80 and a rolling valve 81 is provided on the upper part of the transmission case 2, and a pitching cylinder 84 for lifting and lowering the machine body is provided from the rear part of the hydraulic device.
Is extended to the rear. The left and right ends of the horizontal rod 85, which is integrally provided at the tip of the piston 84a, are connected to each other.
86, 86 are connected to arms 87, 87 projecting upward integrally with the chain cases 5, 5. The right side connecting rod 86 (R) among the above connecting rods has a rolling cylinder 89 in the middle portion.
Is interposed. A flange 91 is integrally formed at the rear end of the pitching cylinder, and the flange, the bracket 7a, and the reinforcing support member 7c are fastened together by bolts 92. Therefore, the mission case 2, the center frame 7, the pitching cylinder 84, and the bracket 7a form a closed structure having a substantially rectangular side view.

The detection rod 95 attached to the float 22 detects the height of the field scene, and the lever 96 switches the pitching valve 80 accordingly. As a result, the pitching cylinder 84 expands and contracts, and the towing wheels 7 and 7 are moved up and down with respect to the machine body to adjust the height of the planting work unit 1a. The pendulum 97 swingably supported in a plane perpendicular to the traveling direction detects the tilt of the machine body in the left-right direction and switches the rolling valve 81 accordingly. As a result, the rolling cylinder 89 is expanded and contracted and the right wheel 7 is moved up and down to correct the lateral inclination of the machine body.

Conventionally, when the pitching cylinder operates, a large bending stress is generated in the middle portion of the entire cylinder length (near the flange 91 when the cylinder is in the extended state). Since the pitching cylinder 84 is integrated with the bracket 7a, the pitching cylinder 84 does not bend and has a strong structure.

EFFECTS OF THE INVENTION As is apparent from the above description, the walk-behind rice transplanter according to the present invention is provided with the space part that passes forward and backward in the left and right center parts of the planting frame, and therefore the space part for operation is provided. A wire or the like can be passed back and forth. Therefore, it is not necessary to bypass the wire or the like around the side portion of the frame, assembly and maintenance are facilitated, and the number of bent portions of the wire is reduced, so that the operation resistance of the wire can be prevented from increasing. Furthermore, the length of the wire can be shortened, which is economical.

[Brief description of drawings]

FIG. 1 is a side view of an example of a rice transplanter to which the present invention is applied, FIG. 2 is a rear sectional view of a planting part frame partially developed, and FIG. 3 is a side view thereof. [Fig. 4] is a side view of a front portion of the fuselage. 1 ... rice transplanter, 7 ... center frame, 7a ... bracket, 10 ... planting part frame, 11 ... seedling stand, 13 ... lateral movement device, 14 ... planting device, 22 ... float , 26 …… Internal space, 28 …… Wire, 82 …… Hydraulic device, 84 …… Pitching cylinder.

Front page continued (72) Inventor Seike Rihe 1 Yakura, Tobe-cho, Iyo-gun, Ehime Pref.Iseki Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] 1. A walk-type rice transplanter in which a planting part frame (10) having a transmission mechanism for a seedling table (11) and a planting device (14) is provided on the front side of the seedling table, wherein the planting is performed. A lower housing (10b) provided with a planting shaft (32) for mounting and driving the frame with the planting device, and an upper housing 10a provided with a lead cam shaft (56) for reciprocating the seedling placing table left and right; The two housings (10a, 10b) are vertically connected to each other, and are configured by a hollow connecting portion (10c) containing a transmission mechanism for interlocking the planting shaft and the lead cam shaft, and the hollow connecting portion (1
The walk-type rice transplanter is characterized in that a space portion that passes forward and backward is provided at the center of the left and right of the planting frame by displacing 0c) to one side.