JP2589009B2 - Seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating transmission case in which a plurality of planting arms each having a seedling planting claw are rotatably supported on a rotating transmission case, and the rotating transmission case is connected to the planting transmission case. The rotation transmitting case is rotatably supported, and as the rotation transmission case rotates, the planting arm cuts out the seedlings from the seedling mounting table, and a planting posture in which the seedlings are planted on the field surface. The present invention relates to a seedling planting apparatus provided with a cam mechanism for rotating the planting arm, which rotates integrally with the rotary transmission case, relative to the rotary transmission case to determine the posture thereof, so as to perform a rotational movement in a shape like a circle. . The above configuration has the following effects as compared with the configuration described below. That is, as shown in Japanese Utility Model Application Laid-Open No. 63-92519, a rotary transmission case in which a plurality of planting arms having seedling planting claws are rotatably mounted is provided on a shaft different from the planting arm rotating shaft center. A gear mechanism that is attached to the body so that it is driven to rotate around the core and that operates so that the planting arm rotates on the rotation transmission case with the rotation of the rotation transmission case inside the rotation transmission case. Since it is only necessary to provide a cam mechanism as compared with a configuration configured by providing a cam mechanism, it is possible to replace the man-hours required for gear machining and the like with the man-hours required only for forming the cam mechanism, thereby reducing the man-hours required. As well as being possible, in the conventional configuration it will be a special shape as the gear shape,
Since the manufacturing method is limited to a manufacturing method that requires advanced technology, the manufacturing cost will also increase significantly, but in the case of the present invention, since only a cam mechanism is formed, a simple press working etc. The cam surface can be formed by a simple manufacturing method,
Manufacturing costs can be reduced. Furthermore, the gears need to be housed in the rotary transmission case, but in the case of the cam mechanism, there is no need to store them in the rotary transmission case. It has various features such as being able to.

[0002]

2. Description of the Related Art Conventionally, in a seedling planting apparatus having the above-mentioned characteristic configuration, a single cam follower which can rotate the cam mechanism integrally with the planting arm relative to the rotary transmission case is conventionally used. And so that the single cam follower rotates relative to the rotary transmission case while performing a revolving motion as the rotary transmission case rotates.
And a single annular cam groove for engaging and guiding the cam follower (Japanese Patent Application No. 2-238089).

[0003]

The above-mentioned structure has the above-mentioned characteristic structure, but has a single annular cam groove and a single cam follower engaged with the cam groove. Therefore, the position of the cam follower may not be determined during the movement in the cam groove, and rattling or fluttering may occur. In other words, since the outer diameter of the cam follower and the inner peripheral surface of the cam groove are in close contact with each other, it is unlikely that rattling or the like will occur, but the planting arm that supports the cam follower with respect to the cam groove is a specific type. In the case of an angular relationship, there is room for the cam follower to swing left and right even when the planting arms are in the same posture, which has caused rattling. Further, it is practically difficult to precisely form the cam groove diameter with respect to the outer diameter of the cam follower, and such a strict setting of the groove diameter makes the movement of the cam follower rather awkward, which is not a good measure. An object of the present invention is to provide a cam follower, a planting arm, and the like that can effectively suppress rattling by paying attention to the number of cam followers to be installed.

[0004]

According to a feature of the present invention, the cam mechanism includes a plurality of cam followers integrated with the planting arm and rotatable relative to the rotary transmission case.
A plurality of annular cam grooves for individually engaging and guiding the cam followers so that the plurality of cam followers rotate relative to the rotary transmission case while revolving as the rotary transmission case rotates. The effect is as follows.

[0005]

In other words, by arranging a plurality of cam followers, at least one of the cam followers can follow the cam surface of the annular cam groove in a contact-following state more than in the conventional configuration, and rattling occurs. Therefore, the relative posture of the planting arm with respect to the rotary transmission case can be restricted by the one cam follower which is less likely to rattle.

[0006]

As a result, since one cam follower has a receiving function of restricting rattling of the other cam follower, the movement posture of the planting arm can be restricted by the cam follower whose positioning is always firm, and the rotational vibration and vibration caused by the rattling can be suppressed. It is possible to prevent the seedlings from falling off from the seedling-planting nails due to the occurrence of rotational vibration.

[0007]

As shown in FIG. 4, a planting case 2 is arranged below a seedling mounting table 1, and a planting transmission case 3 is extended rearward from the planting case 2 to form a planting transmission case 3. A seedling planting mechanism 4 is provided at the rear end, and a float 5 is arranged below the planting transmission case 3 to constitute a seedling planting apparatus A. Seedling planting mechanism 4
The rotating transmission case 6 is pivotally supported on the side surface of the planting transmission case 3 and the planting claws 7A,
Two planting arms 7, 7 equipped with 7A are mounted so as to be relatively rotatable. As shown in FIG. 1, the rotating shaft 8 protrudes from the side surface of the planting transmission case 3, and the rotating transmission case 6 whose side surface on the planting transmission case 3 side is open can be integrally rotated with the rotating shaft 8. Power is transmitted from the planting case 2 via the chain transmission mechanism 9 in the mounting and planting transmission case 3 to drive the rotation shaft 8, thereby rotating the rotation transmission case 6 around the axis X of the rotation shaft 8. Configure to

The mounting structure of the planting arm 7 will be described. As shown in FIG. 1, a horizontal rotation shaft 10 is mounted at both longitudinal ends of the rotary transmission case 6 via a bearing 11 so as to be relatively rotatable around an axis Y of the horizontal rotation shaft 10. The planting arm 7 is attached by the end plate 12 so as to rotate integrally. A bell crank 13 is integrally formed at an end of the lateral rotation shaft 10 in the rotation transmission case 6, and cam followers 14 are rotatably supported at both ends of the bell crank 13. on the other hand,
A 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 followers 14, 14 are respectively engaged with the side surface of the cover body 15 located on the rotation transmission case 6 side. The two annular cam grooves 16 and 16 for guiding in the direction are formed. The rotation direction of the rotation transmission case 6 while revolving the planting arm 7 with the rotation of the rotation transmission case 6 around the axis X by the engagement guide action of the cam follower 14 and the annular cam groove 16. 2, the planting claw 7A is moved to draw an elliptical trajectory as shown in FIG.
The cutting posture for cutting out the seedlings and the planting posture for planting on the field surface are determined. A pair of the cam followers 14 and the annular cam grooves 16 are provided, the bell crank 13 is set in a posture along the rotation surface, the annular cam grooves 16 are set in different shapes, and one of the cam followers 14 It functions as a position restricting tool, and suppresses the cam follower 14 from rattling during revolution. Here, the cam follower 14 and the annular cam groove 16 are referred to as a cam mechanism B. Bell crank 1 of cam follower 14
An elastic bush (not shown) is attached to the pivotal support portion with respect to 3 to suppress the rattling and vibration of the cam follower 14 and the planting arm 7.

[0009] Seedling pushing tool 1 provided on planting arm 7
7 will be described. As shown in FIG.
A slide rod 18 which can slide back and forth is supported, and a pushing portion 1
8A is integrally formed, a spring 19 is applied to the inner end of the slide rod 18 so as to bias the slide rod 18, and a drive cam mechanism C for driving the slide rod 18 out and back against the biasing force of the spring 19 is provided. 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 to drive the slide rod 18,
A drive cam mechanism C is formed by the cam body 21 for driving the cam follower body 20, and when the planting claw 7A rushes into the field surface, the slide rod 18 is protruded to the seedling pushing posture, and retreats in other rotation phases. It is driven by the drive cam mechanism C to maintain the posture.

Referring to FIG. 1, the structure of the cam body 21 will be described. Support shaft 2 integrally formed with cam body 21 at one end
2 is externally fitted to the horizontal rotation shaft 10 and further,
A bearing 23 is fitted around the support shaft 22 and the support shaft 22 is mounted on the planting arm 7 so as to be relatively rotatable. The inner end of the support shaft 22 faces the boss portion of the rotary transmission case 6, and the inner end of the support shaft 22 is spline-fitted to the inner surface of the boss portion, and the cam body 21 is connected to the rotary transmission case 6. No relative rotation is set. The rotation shaft 6 and the cam body 21 are moved by the rotation of the rotation transmission case 6.
The revolving motion is performed in the same rotation phase that does not rotate relative to the planting arm 7 so as to rotate relative to the planting arm 7.
The slide rod 18 is configured to protrude and operate only at the time of planting while revolving with the planting arm 7 integrally with the planting arm 7.

[Alternative Embodiment] The diameters of the two cam followers 14, 14 may be different from each other. By making the groove widths of the annular cam grooves 16 different from each other in accordance with the difference in diameter, troubles such as derailment at a portion where the two annular cam grooves 16 intersect can be prevented. Three or more cam followers 14 and three or more annular cam grooves 16 may be provided.

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 accompanying drawings.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view showing a posture changing mechanism of a planting arm.

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

FIG. 3 is a longitudinal sectional side view showing an internal structure of a planting arm.

FIG. 4 is a side view showing the seedling planting apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seedling stand 6 Rotating transmission case 7 Planting arm 7A Planting claw 14 Cam follower 16 Annular cam groove B Cam mechanism

Claims (1)

(57) [Claims] 1. A plurality of planting arms (7) each having a seedling planting claw (7A) are rotatably supported by a rotation transmission case (6) relative to a rotation transmission case (6). )
As the planting arm rotates, the planting arm (7) makes an elliptical rotating motion between a cutting posture for cutting out the seedlings from the seedling mounting table (1) and a planting posture for planting the seedlings on the field surface. A seedling provided with a cam mechanism (B) for rotating the planting arm (7), which rotates integrally with the rotary transmission case (6), relative to the rotary transmission case (6) to determine its posture. A plurality of cam followers (14) integrated with the planting arm (7) and rotatable relative to the rotary transmission case (6); The cam follower (14) rotates relative to the rotary transmission case (6) while performing a revolving motion as the rotary transmission case (6) rotates.
And a plurality of annular cam grooves (16) for individually engaging and guiding the seedlings.