JPH0530825A - Seedling planting device - Google Patents

Abstract

PURPOSE:To compact a rotary transmission case by specifically changing position correlation between a fixing position of nut and a projecting boss. CONSTITUTION:A nut 27 is fastened at a position at the opposite side of a roller 25 while laying an arm 13 between the nut and the roller and a ring- shaped cam groove 16 and the arm are laid at a close interval. The nut projecting from the arm is positioned closer to an outer wall face side than the inner edge of a boss 6A projecting inside than the outer wall face of a rotary transmission case 6 and the nut is overlapped to the boss. The interval between the arm and the tip of the boss and the interval between the arm and the outer wall face can be narrowed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms a plurality of bosses for mounting planting arms, each of which is provided with a seedling planting claw, on a rotary transmission case that rotates relative to a machine body about a horizontal axis. The planting arm shaft is rotatably supported on the boss so as to be rotatable about its axis and extending over the inner and outer spaces of the rotary transmission case, and the planting arm is provided at the outer end of the planting arm shaft. An arm is integrally rotatably attached to the inner end of the planting arm shaft, the planting arm and the arm are configured to be relatively rotatable with respect to the rotation transmission case, and a cam follower is attached to the arm. An annular cam groove that engages and guides the cam follower is provided on the opposing side surfaces of the machine body, and as the rotation transmission case rotates,
The present invention relates to a seedling planting device configured to perform an elliptic rotary motion in a cutting posture in which the seedling arm cuts out a seedling from a seedling mounting table and a planting posture in which the seedling is planted on a field surface. The structure described above has the following effects as compared with the structure described below. In other words, actual exploitation 63-9
As shown in Japanese Patent No. 2519, a rotation transmission case in which a plurality of planting arms having seedling planting claws are relatively rotatable is rotationally driven about an axis different from the axis of the planting arm rotation. A gear mechanism is installed inside the rotation transmission case so that the planting arm is rotated around the rotation transmission case while revolving with the rotation of the rotation transmission case. Compared with the one configured by the above, it is only necessary to provide a cam mechanism, so the manufacturing man-hours required for gear machining etc. can be replaced with the manufacturing man-hours required to form the cam mechanism, and the manufacturing man-hour can be reduced by that much. Since the gear shape is a special shape, it is limited to manufacturing methods that require advanced technology, so the manufacturing cost will also rise significantly, but this In the case of light, since it only forms a cam mechanism, can form a cam surface by a simple manufacturing method of simply press working or the like, it is possible to reduce the manufacturing cost. Furthermore, the gears need to be stored in the rotation transmission case, but the cam mechanism does not need to be stored in the rotation transmission case. It has various characteristics such as being able to.

[0002]

2. Description of the Related Art As a seedling planting device having the above-mentioned characteristic construction, there is one previously filed by the present applicants, and its gist is to relatively move a cam follower by engaging it in an annular cam groove. And a pin for freely rotating the roller at one end in the longitudinal direction, and the pin is integrally formed with an arm formed at the inner end of the planting arm shaft (Japanese Patent Application No. 2- 238089).

[0003]

The above-mentioned structure has the above-mentioned characteristic structure. However, when the roller or the like fails and needs to be replaced, only the roller or the cam follower should be replaced independently. Was difficult and there was room for improvement. Therefore, as a structure that can be replaced by the cam follower alone and the mounting state can be made firm,
A roller is attached to the bolt instead of the pin, and one end of the bolt is tightened and fixed to the arm with a nut, but the position of the nut with respect to the cam groove becomes a problem. That is, if the cam follower is attached to the arm so that the nut is located in the cam groove, only the axial length of the nut and the length of the tip of the bolt protruding from the nut are added to the engagement length of the roller, It was necessary to secure the depth length of the annular cam groove, which made the distance between the arm and the annular cam groove wide. An object of the present invention is to provide a nut which can be made compact by making a gap between the arm and the annular cam groove narrower than the conventional one by devising the arrangement position of the nut.

[0004]

According to a characteristic structure of the present invention, a roller that engages the cam follower with the annular cam groove and relatively moves, and a bolt that rotatably mounts the roller at one longitudinal end thereof. , A nut that is located on the opposite side of the roller with the arm interposed and that is screwed to the bolt that penetrates the arm and fastens the bolt to the arm, and the bolt is attached to the arm In this state, the nut is located in the outer wall surface side beyond the inner end of the boss protruding inward from the outer wall surface of the rotation transmission case, and the operation and effect thereof are as follows. ..

[0005]

In other words, the nut tightening position is located on the opposite side of the roller with the arm sandwiched so that the annular cam groove and the arm are closely spaced and the nut protruding from the arm is rotated. Since the nut is overlapped on the outer wall side of the inner end of the boss protruding inward from the outer wall of the transmission case and the nut is overlapped with the boss, the distance between the arm and the tip of the boss and the arm and the outer wall surface. The distance between and can be narrowed.

[0006]

The rotation transmission case can be made compact and the arrangement of the planting arm and the rotation transmission case, which is restricted by the spacing between the planting ridges, by making the above-mentioned changes in the mounting position of the nut and the positional relationship with the protruding boss. Easy to configure.

[0007]

EXAMPLE As shown in FIG. 4, the planting case 2 is arranged below the seedling placing table 1, and the planting transmission case 3 is extended rearward from the planting case 2 to plant the planting transmission case 3. The rear end is equipped with the seedling planting mechanism 4, and the float 5 is arranged below the planting transmission case 3 to form a seedling planting apparatus A. Seedling planting mechanism 4
The rotation transmission case 6 is rotatably supported on the side surface of the planted transmission case 3, and the planting claws 7A are respectively attached to the rotation transmission case 6.
Two planting arms 7, 7 equipped with 7A are mounted so as to be rotatable relative to each other. As shown in FIG. 1, the rotation shaft 8 is projected from the side surface of the planted transmission case 3, and the rotation transmission case 6 whose side surface on the planted transmission case 3 side is in an open state can be integrally rotated with the rotation shaft 8. By mounting and transmitting power from the planted case 2 via the chain transmission mechanism 9 in the planted transmission case 3 and driving the rotary shaft 8, the rotary transmission case 6 is rotationally driven around the axis X of the rotary shaft 8. Configure to

The mounting structure of the planting arm 7 will be described. As shown in FIG. 1, a boss 6A for mounting a planting arm 7 is formed at both longitudinal ends of a rotary transmission case 6, and a cylindrical shaft 10 as a planting arm shaft is mounted on the boss 6A.
1 and the end plate 12 is fixed to the cylindrical shaft 10 so as to be able to rotate integrally therewith via a retaining pin a, and the planting arm 7 is attached to the end plate 12. Install with a bolt so that it rotates together. An arm 13 is integrally formed at an end of the cylindrical shaft 10 inside the rotation transmission case 6, and a cam follower 14 is rotatably supported by a tip of the arm 13 so as to freely rotate. On the other hand, the cover body 15 for closing the open portion of the rotary transmission case 6 is fixed to the side surface of the planted transmission case 3, and the cam follower 14 is provided on the side surface of the cover body 15 located on the rotary transmission case 6 side.
Are formed with two annular cam grooves 16 for respectively engaging and guiding.

The cam follower 14 is provided with the annular cam groove 16
Roller 25 which is engaged with the roller and moves relatively, and the roller 25
Is mounted on one end in the longitudinal direction so as to be freely rotatable so that the end faces thereof are flush with each other, and is located on the opposite side of the roller 25 with the arm 13 interposed therebetween and the arm 1
3 is screwed onto the bolt 26 that penetrates
Is formed with a nut 27 that is fastened to the arm 13, and in a state where the bolt 26 is attached to the arm 13, the nut 27 of the boss 6A that protrudes inward from the outer wall surface of the rotation transmission case 6 is formed. The outer wall surface 6 rather than the inner end
It is located in the B side.

The axial center X of the rotary transmission case 6 is provided by the engagement guide action of the cam follower 14 and the annular cam groove 16.
As the planting arm 7 revolves along with the rotation around it, the planting arm 7 is rotated relative to the rotation transmission case 6 to draw an ellipse-shaped trajectory of the planting claw 7A as shown in FIG. As described above, the cutting posture for cutting out the seedlings from the seedling placing table 1 and the posture for planting on the field surface are determined.

Seedling pusher 1 provided on the planting arm 7
7 will be described. As shown in FIG. 3, the planting arm 7
The slide rod 18 which is freely slidable in and out of the slide rod 18 is supported at the outer end of the slide rod 18.
8A is integrally formed, and a drive cam mechanism C that drives the slide rod 18 to move back and forth against the biasing force of the spring 19 by causing the spring 19 that biases the slide rod 18 to act on the inner end of the slide rod 18. The seedling pushing tool 17 is provided. That is, a cam follower body 20 that engages with the inner end of the slide rod 18 and drives the slide rod 18,
A drive cam mechanism C is formed with the cam body 21 that drives the cam follower body 20, and when the planting claw 7A plunges into the field, the slide rod 18 is projected in the seedling pushing-out posture and retreats at other rotation phases. It is driven by the drive cam mechanism C to maintain the posture. As shown in FIG. 1, the structure of the cam body 21 will be described. Support shaft 2 from both sides of cam body 21
2 and 22 are extended laterally and one support shaft 22
Is rotatably supported by the planting arm 7 via a bearing, the other support shaft 22 is relatively rotatably fitted in the cylinder shaft 10, and its tip projects from the end of the cylinder shaft 10 into the internal space of the rotation transmission case 6. Then, the cam follower 2 with arm is attached to the tip of the protruding support shaft 22.
The cam follower with arm 2 by fitting the arm part of 3 onto the spline
3 is configured to rotate integrally with the support shaft 22 and then with the cam body 21. An annular groove 24 is formed in the cover body 15 facing the cam follower with arm 23 with the axis X as the center. Support shaft 22
As a result, the cam body 21 is configured to revolve relative to the planting arm 7 by performing an orbital motion in the same rotation phase that does not rotate relative to the rotation transmission case 6 as the rotation transmission case 6 rotates. While the shaft 22 is revolving integrally with the planting arm 7, the slide rod 18 is projectively operated only when planting.

As shown in FIG. 1, the rotation of the rotary transmission case 6 and the cover body 15 are aimed at the effect of the arm 13 scraping up the lubricating oil as the rotary transmission case 6 is planted and rotated. An oil seal 28 is attached to the outer peripheral ends of the cover body 15 and the rotation transmission case 6 so as to be used as a lubrication method for a closed space surrounded by. [Another embodiment] As the bolt 26 constituting the cam follower 14,
Not only a so-called bolt, but also a head pin having a screw formed thereon, the height of the head is preferably as low as possible when projecting from the end surface of the roller 25. The head portion may be embedded in the roller 25 so that the end surfaces of and are flush with each other. Two or more cam followers 14 and annular cam grooves 16 may be provided. The roller 25 itself does not necessarily have to be configured so that it can freely rotate with respect to the bolt 26.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view showing a mounting state of a planting arm.

FIG. 2 is a side view showing an annular cam groove.

FIG. 3 is a vertical sectional side view showing an extrusion cam.

[Figure 4] Overall side view

[Explanation of symbols]

 1 Seedling platform 6 Rotation transmission case 6A Boss 7 Planted arm 7A Planted claw 10 Planted arm shaft 13 Arm 14 Cam follower 16 Annular cam groove 25 Roller 26 Bolt 27 Nut

Claims (1)

Claims: 1. A plurality of planting arms (7) each having a seedling planting claw (7A) provided on a rotation transmission case (6) that rotates relative to the machine body about a horizontal axis. ) A boss (6A) for mounting is formed, and a planting arm shaft (1) is attached to the boss (6A).
0) is rotatably supported around its axis and extends in the inner and outer spaces of the rotation transmission case (6), and the planting arm (7) is attached to the outer end of the planting arm shaft (10). ,as well as,
An arm (13) at the inner end of the planted arm shaft (10),
It is attached so as to be integrally rotatable, and the planting arm (7) and the arm (13) are configured to be rotatable relative to the rotation transmission case (6), and a cam follower (14) is attached to the arm (13). An annular cam groove (16) that engages and guides the cam follower (14) is provided on a side surface of the machine body facing the cam follower (14), and the planting arm is provided as the rotation transmission case (6) rotates. (7)
Is a seedling planting device configured to perform an elliptical rotary motion over a cutting posture for cutting seedlings from the seedling platform (1) and a posture for planting the seedlings on a field surface, The cam follower (14) is replaced with the annular cam groove (16).
A roller (25) which is engaged with and relatively moves, a bolt (26) which rotatably mounts the roller (25) at one end in the longitudinal direction, and the roller (25) which sandwiches the arm (13). The bolt (26) located on the opposite side of the arm (13) and penetrating the arm (13).
6) is formed with a nut (27) that is fastened to the arm (13), and the nut (27) is attached to the arm (13) with the bolt (26) attached to the rotation transmission case (6). Seedling planting device which is positioned so as to enter the outer wall surface side from the inner end of the boss (6A) projecting inward from the outer wall surface.