JPH07106093B2 - Rice planting equipment for rice transplanters - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seedling planting device of a rice transplanter for splitting seedlings one by one from a seedling mat on a seedling mounting table and then planting this in a field scene. is there.

2. Description of the Related Art As shown in Japanese Patent Publication No. 49-17808, which drives a pawl shaft, that is, a cam shaft, through a sun gear, an intermediate gear, and a planetary gear provided in a pawl transmission case, that is, a drive gear case. There is.

The locus of this planted nail is designed to draw an elliptical closed loop curve close to a circle.

Problems to be Solved by the Invention In a seedling planting device that draws an elliptic closed loop curve close to a circle as described above, the locus of the planting nail is not compact, and therefore the entire seedling planting device becomes large, and the locus is changed. Couldn't be done easily.

Therefore, the technical problem of the present invention is to obtain a rice transplanter having a seedling planting apparatus in which the locus drawn by the planting nail is compact as a whole. The technical means of solving the problem is to fix a drive case in which a planetary gear mechanism utilizing an eccentric gear is installed on an input shaft which is transmitted from a power source, and to which the drive case is attached, the radius from the input shaft A cam shaft is provided at an appropriate distance in the direction and at equal parts in the circumferential direction of rotation of the drive case, and the cam shaft is provided in a direction opposite to the rotation direction during one rotation of the drive case. Externally fit the planting claw case support member that was made to rotate,
In a seedling planting device having a rotary type planting claw provided with the planting claw case on the planting claw case supporting member, the maximum eccentric positions of the gears in the planetary gear mechanism are aligned on the same side on a straight line. A camshaft in which the reference line connecting the shaft centers is inclined so that the seedling placing table side is downward, and the tip of the planting claw and the planting claw case support member are fitted to the upper side of the reference line. The seedling planting device is configured so that a line connecting the center of the plant can be arranged.

EFFECTS OF THE INVENTION According to this technical means, the locus drawn by the planting nail is more curved in one side, and the other side draws a deformed elliptical closed loop curve closer to a straight line. It is compact and the whole seedling planting device is compact.

Also, by moving the reference line downward with respect to the seedling mounting table, the entire closed loop locus is positioned downward, but the line connecting the tip of the planting claw and the planting claw case support member is used as the reference line. By locating it upwards, the center of the axial center locus of the planting claw case support member can be made higher than that with a horizontal reference line, and therefore the distance between the seedling stand and the drive case can be reduced. The overall balance is improved.

Then, the most optimal part of the locus can be used for seedling and planting.

Example First, a description will be given of the entire rice transplanter for post-mounting.

In FIGS. 23 and 24, (1) is a passenger vehicle body, and a planting portion (3) is connected to a rear portion of the passenger vehicle body (1) via a lift mechanism (2).

The passenger car body (1) has a mission case (5) attached to the rear part of the body frame (4), an engine (6) mounted on the body frame (4), and front wheels (7) under the engine.

Further, there are transmission cases (8) directed from the left and right sides of the mission case (5) to the rear.

At the rear end of the transmission case (8) is a rear wheel (9). (Ten)
Is a driver's seat, (11) is a footstep, and (12) is a traveling steering wheel.

A top link (14) and a lower link (15) are attached to the lift mechanism (2), and each link (14) (15) is swung by expansion and contraction of a hydraulic cylinder (not shown) to move the planting part (3). It is designed to go up and down.

In the figure, (16) shows a fitting for the link of the hydraulic cylinder.

The link frame is also attached to the transmission case (8) with its mounting hardware.

The planting section (3) comprises a seedling stand (18), a float (19) and a transmission case (20).

(21) is a marker and (22) is a float elevating lever.

More specifically, the seedling planting device of the rice transplanter as described above is as follows.

1 to 13 has a forced pushing claw device, and the transmission shaft shown in FIG. 1, that is, the input shaft (23) is rotatable with respect to the planted transmission case (20). is there.

However, there is an upper stop device that disengages the clutch unit clutch at one or more places per one rotation.

A sun gear (24) is loosely fitted to the input shaft (23).

However, it is fixed to the planted transmission case (20) through the sun gear phase adjusting member (25).

As shown in FIGS. 10 and 11, the member (25) has a cut groove (25c) in the end boss portion (25b) of the fan-shaped arm (25a),
As shown in FIG. 8, the sun gear (24) has a kerf (24a) to be matched with the kerf (25c), and the kerfs (25c) and (24a) are changed by changing their matching positions. ) (24a) with the key (56) fitted, and the bolt (27) is inserted into the arcuate slit groove (26) in the fan-shaped part of the arm (25a) and fixed to the planted transmission case (20). The relative position of the gear (24) with respect to the planted transmission case (20) can be changed.

Although a plurality of cut grooves (25c) are shown in the figure, they may be provided at one place because they are in phase with each other. A hollow split drive case (28) is mounted on the end of the input shaft (23), and phase adjustment is performed on the input shaft (23) in relation to the upper stop device of the planting claw. The drive case (28) is attached and fixed to the input shaft (23) with bolts (29). The end portion of the input shaft (23) is formed into a square shape for phase adjustment, and this is fitted into the square hole (28a) of the drive case (28).

The drive case (28) as a rotating body has a sun gear (24).
And an intermediate gear (3 that has the same number of teeth as the sun gear (24).
0) (30) is rotatably provided via the intermediate shaft (31), and on the cam shaft (32) as the planting shaft, the intermediate gear (30) on the intermediate shaft (31) is provided. A planetary gear (33) having the same number of teeth as the sun gear (24) which is always meshed with each other is fitted through a support member described later.

These sun gears (24), intermediate gears (30), planetary gears (3
3) is an appropriate dimension (e) from the center of rotation as shown in FIG.
It is an eccentric gear.

The cam shaft (32) is also attached to the drive case (28) via the position adjusting member (34) shown in FIGS.

The member (34) is fixed to the cam shaft (32) and fixed to the drive case (28) with a bolt (35). The bolt (35) is inserted into the slit groove (36) provided in the member (34) so that the member (34) can rotate, and the cam shaft (32) can be fixed at the rotated position. It is like this.

A support member (37) is fitted on the cam shaft (32) as shown in FIGS. 1 and 7, and the support member (37) includes the planting claw case (38) and the planetary gear (33). Is fixed.

By adjusting the position adjusting member (34) as described above, the pushing timing of the pushing claw (46) is changed.

Reference numeral (39) is a bolt for fixing the planting claw case (38) to the support member (37), and the bolt hole (60) of the planting claw case (38).
(40) is a bearing inserted between the support member (37) and the cam shaft (32).

The cam shaft (32) is provided with a cam (41), and the push arm (42) contacting the cam (41) drives a push rod described later via the intermediate shaft (57). At its intersection there is a spring (43), in contrast to a cushion rubber (44).

Therefore, the push arm (42) is biased by the spring (43) and is cushioned by the cushion rubber (44) with respect to the planting case (38).

The structure of the push-out claw portion will now be described in more detail with reference to FIGS. 3 to 6. The push arm (42) is pivotally supported by the shaft (48), and the end portion (42a) is at the cam (41). Is in contact with.

The top surface of the tip portion (42b) of the push arm (42) contacts a washer (49) having a cross-section, and the spring (43) is attached to the washer (49).
Are in contact.

Also, the cushion rubber (4
4) is installed. Specifically, a cushion rubber (44) is fixed to an intermediate shaft (57) arranged in an L shape at the tip of the push arm (42), and the intermediate shaft (57) is connected via a relay metal fitting (61). The push rod (47) is activated.

(45) is a planting claw, (46) is a pushing claw, and the pushing claw (46) is pushed by a push rod (47) driven by a push arm (42).

When the drive case (28), which is a rotating body, rotates about its input shaft (23) in the direction of arrow A as shown in FIG. 19, the sun cannot rotate with respect to the planted transmission case (20). The intermediate gear (30) meshing with the gear (24) rotates in the direction of arrow B by the same rotation angle as the rotation angle of the rotation of the drive case (28).

The support member (37) of the planting pawl case (38) that is interlocked with the intermediate gear (30) via the planetary gear (33) is
The rotation of (0) causes the direction of arrow C, that is, the drive case (28).
Since it rotates in the direction opposite to the rotation direction of the plant, the planting claw case (38) as a planting rod turns around the input shaft (23) in a posture in which the planting claw case (38) faces the seedling table. When the side facing the seedling placing table (18) descends from top to bottom during the turning motion, one seedling is planted from the seedling mat on the seedling placing table (18) at the tip of the planting claw (45). After splitting only, it is planted in the field scene at the lower limit of descending and then rises from the field scene. Since the extruding claw (46) extrudes the seedling at the time of planting, the seedling leaves the planting claw (45). .

Next, the block claw device shown in FIGS. 14 and 15 will be described.

The configuration of the input shaft (23) with respect to the planted transmission case (20), the configuration of the drive case (28), and the configuration of the cam shaft (32) are the same as the configurations of the forced extrusion pawl device, and therefore the same parts are the same. Is attached.

As for the structure of the planted claw case (38), the open / close rod (50) contacting the cam (41) is rotatable about an intermediate pivot (51) as a fulcrum, and the open / close claw shaft (52) is rotated. The actuating arm (53) is driven.

Therefore, the open / close claw (55) rotates with respect to the fixed claw (54) about the open / close claw shaft (52) to open and close the claw. The opening / closing dimming of the block claw is adjusted by the adjusting member (34).

Now, again while the drive case (28) shown in FIG. 19 is rotating in the direction of arrow A, each of the planting claw cases (38) moves in the direction of arrow C,
That is, by rotating in the opposite direction to the rotation direction of the drive case (28), the cam (41) in each planting claw case (38).
Based on the shape of the cam (41) that the tip of the claw (54) (55) enters the field scene at the planting position near the lower limit of lowering of the planting claw case (38), the opening / closing rod (50) contacting the Since it rotates, the opening / closing claw shaft (52) rotates via the operating rod (53), and the opening / closing claw (55) moves away from the fixed claw (54) to reliably plant seedlings in the field soil. Is.

By the way, as shown in FIG. 19, the sun gear (24) and the intermediate gear (3
0) and the planetary gears (33) are both eccentric gears that are eccentric by the amount e, the support member (37) revolves as the drive case (28) rotates in the direction of arrow A, and The rotation of the supporting member (37) itself in the C direction is caused by the difference in meshing pitch radius with respect to the rotation axis in meshing of the eccentric gears (23) (30), (30) (33) during one rotation thereof. The drive case (28) is configured to speed up or slow down with respect to its rotation speed. Therefore, the time when the rotation of the planting claw case (38) in the C direction is delayed relative to the rotation of the gear case (28) descends from the seedling picking position of the planting claw case (38) toward the field scene. And the time when the rotation of the planting claw case (38) in the C direction becomes faster corresponds to the time when the planting claw case (38) rises from the planting position so as to approach the upper limit of the rise of the planting case (38). By setting as described above, when the planting claw case (38) descends so as to approach the field scene, the posture of the planting claw case (38) revolves slowly while rotating slowly in the direction C rather than the rotation of the drive case (28). When changing to downward and climbing to approach the upper limit after planting, it will move slightly faster than the rotation of the drive case (28) in the C direction and rotate freely to change its posture to upward. As shown, the closed locus of the movement trajectory of the nail tip of the planting nail (45). It is curved with one and the other has an elliptical shape of the closed loop curve of polarization-shaped close to the more linear.

In FIG. 18, one planted claw case is explained. The axial center locus (G) of the support member (planetary gear) of the planted claw case describes a circular motion, but its center (O Angle (AZ ₁ ) (A
The straight line having Z ₂ ) is the reference line (K) (N) of the planting nail.

From each reference line (K) (N) to these reference lines (K) (M)
From the above point (L) (M) on a straight line (P) (Q) having angles ADD ₁ and ADD ₂ centered on a point (L) (M) intersecting the locus (G) and S) RR to the distance to (T)
Assuming ₁ and RR ₂ , each reference line (K) (N) and the gear inside the drive case connect the shaft centers of the eccentric gears whose maximum eccentric positions are aligned on the same side as shown in FIG. It is in a position that matches the line. That is, it is at a position that matches the direction of the maximum eccentricity.

Further, in the case of the block claws (54) and (55) in FIG. 21 or FIG. 22, it is preferable to tilt the closed loop curve as shown in FIG. Better. Further, in the case of the forced extrusion claw (46), the seedlings are forcibly extruded at the time of planting, so it is better to make the closed loop curve nearly upright as shown in FIG.

The reference line (K) (N) is changed by changing the mounting phase of the sun gear to the planted transmission case by the sun gear phase adjusting member. When H) is changed, the entire locus drawn by the planting nail moves and changes.

In addition, (ADD ₁ ) (ADD ₂ ) described above is the mounting angle of the planting arm to the drive case (AZ ₁ ) (AZ ₂ ) is the sun gear, the intermediate gear, and the planetary gear aligned with the vertical line (H) in a straight line. It is the angle of the reference line that has a correlation between the gears that are aligned and heading in the same direction, but at the same time, it is also the starting angle of the planting claw.

Therefore, by changing the starting angle (AZ) of these planting claws and the mounting angle (ADD) of the planting arm,
Since the static locus of the planting can be changed, whether the closed loop curve of the static locus of the planting is tilted or upright is changed by changing the mounting phase of the sun gear to the planting transmission case. ) Is changed), the phase position relative to the mounting angle of the planting arm with respect to the axis of the planetary gear of the drive case of the planting arm is changed (the mounting angle of the planting arm (ADD) is changed). You can change the locus in the vertical direction by making a small change.

Whether the closed loop curve is tilted or upright is done by changing the phase of the sun gear with respect to the planting transmission case, and thereby the trajectory moved vertically is adapted to the seedling picking position and the planting position. Therefore, in order to return it to the opposite vertical direction, the locus is adjusted by changing the relative position of the planting claw case (38) with respect to the drive case (28) as shown in FIG. That is, the bolt (3
9) When fixing the planting claw case (38) to the support member (37) of the planting claw case (38), bolt holes (60a) to the planting claw case (38) in advance as shown in FIG. (60b) is provided and the bolt can be changed by inserting a bolt into any of the bolt holes. A slit groove may be used instead of the bolt hole.

Then, in FIGS. 21 and 22, the plot point (x) of the loop curve (X) and the plot point (g) of the locus (G) of the eccentric shaft center of the support member (37) of the planted nail case (38) are shown. Indicates the corresponding position, and according to this, the loop curve (X)
The speed is slow at the upper and lower limits of, and fast at the up and down.

Further, in FIGS. 21 and 22, the loop curve (X) is shown by a solid line, another dashed line, and a dotted line. This is the phase of the sun gear (24) in the eccentric direction by the sun gear phase adjusting member (25). It shows the case where is changed.

That is, as shown in FIG. 19, when the phase position of the sun gear (24) is displaced from position D to position E by θ'in the direction opposite to the rotational direction A of the drive case (28), the maximum eccentric position changes. , The position of the reference line is changed and
As shown by the dotted line in FIG. 20, the movement locus (X) of the planting claw before displacement is shifted to (X ′).

Further, when the phase position of the sun gear (24) is displaced from the D position to the F position in the same direction as the rotation direction A of the drive gear case (28) by an angle (θ ″), the planting locus is as shown by the one-dot chain line. The movement locus (X) before the displacement of the movement locus of the planting nail shifts to (X ″).

The change in the movement trajectory as described above can control the seedling removal amount, and the X ″ position is when the seedling removal amount is small and the X ′ position is when the seedling removal amount is large.

By the way, the reference line (N) described above in FIGS. 21 and 22.
All of (K) substantially coincide with the direction orthogonal to the line (W ₁ ) (W ₂ ) connecting the seedling picking position (a) and the planting position (b).

Also, since the seedling picking position is on the descending side below the upper limit of the closed loop curve, proper seedling picking can be performed with the planting claws, and the planting position is in the middle of lowering above the lower limit of the closed loop curve. The planting is carried out effectively, and in any case, the portion close to the straight line in the locus can be utilized and planting can be carried out effectively.

Furthermore, the planted pawl has a smaller number of rotating members and a simpler movement than a conventional type without using a planetary gear, that is, a crank type, and therefore torque fluctuations are small.

Further, since the base of the planting claw case (38) is rotatably provided at equally spaced locations in the circumferential direction of rotation of the drive case (28), one planting claw case is provided for the drive case (28). However, since the locations are equally divided, it is possible to attach 1 to n planting nail cases.

By the way, the above facts indicate that the phase of the sun gear, which is the reference line connecting the axes of the gear groups in which the maximum eccentric positions of the sun gear, the intermediate gear, and the planet gear are aligned on the same side on a straight line, relative to the transmission case of the sun gear. It can be freely selected by changing it, and the line connecting the tip of the planting claw and the center of the cam shaft on which the support member of the planting claw case is fitted can be freely arranged.

Therefore, the present invention is configured as follows.

That is, the maximum eccentric position of each gear of the plurality of gear groups in the drive case is directed downward with respect to the seedling mounting table with respect to the reference line connecting the axes of the gear groups arranged on the same side on a straight line. , A line connecting the tip of the planting claw and the center of the cam shaft on which the support member of the planting claw case is fitted with respect to the reference line, that is, FIG. Eccentric gears whose maximum eccentric positions are aligned on the same side, that is, the reference line (K) connecting the eccentric shaft centers of the gear group.
On the other hand, a line (P) connecting the tip S of the planting claw and the cam shaft center (L) can be arranged on the upper side. According to this, the drive locus is curved by one side. ,
The other one draws an elliptical closed loop curve that is closer to a straight line, and its locus is compact, and the whole seedling planting device is compact. Then, by setting the reference line (K) downward with respect to the seedling mounting table, the whole closed loop locus is positioned downward, but the line connecting the tip of the planting claw and the planting claw case support member ( By arranging P) on the upper side with respect to the reference line (K), it is possible to position the locus upward and set the seedling and planting appropriately. That is, the device shown in FIG. 16 is used, and the axial center locus of the planting nail case support member (37) can be made higher than that of a device having a horizontal reference line. The distance between the drive case and the drive case (20) can be reduced, and the balance is improved.

In addition, although the drive case (28) using the intermediate gear (30) has been described in the above embodiments, a chain may be used instead of the intermediate gear. Show.

Fig. 26 (a) shows two sun sprocket gears, and (62) and (66) show the sun sprocket gears.
Chain (64) to planetary sprocket gears (63) (63)
It is driven by (68). The eccentricity of the sprocket gear is no different from that of the previous embodiment.

Fig. 26 (b) shows one sun sprocket gear,
It is an embodiment in which the number of planetary sprocket gears is increased by 1,
The sun sprocket gear (62) drives the planet sprocket gear (63) through the chain (64), and the planet sprocket gear (67) coaxial with this drives the planet sprocket gear (63) through the chain (70). It is designed to drive.

FIG. 26 (c) shows a solar sprocket gear (62) driving a planet sprocket gear (63) (63) via a chain (71), and FIG. 25 shows that of FIG. 26 (a). The case is illustrated.

25, those parts which are the same as those corresponding parts in FIG. 1 are designated by the same reference numerals.

[Brief description of drawings]

FIG. 1 is a plan view of a forced extrusion claw of the device of the present invention. FIG. 2 is a side view of the same. FIG. 3 is a partially cut side view of a planting claw case of the forced extrusion claw. (E) is a cutaway plan view of the planting claw case for the forced extrusion claw, a front view and a side view of the relay fitting, and a front view and a side view of the cushion rubber. Fig. 5 is a side view of the planting claw case for the forced extrusion. 6 (a) to (d) are the same as the above partially cut side view and plan view, front view and side view of the washer. FIG. 7 is an enlarged cutaway view of the device of the present invention. FIG. 8 is a perspective view of the sun gear part. FIG. 9 is a rear view of the forced ejection claw of the device of the present invention. FIG. 10 is a plan view of the sun gear phase adjusting member. FIG. 11 is a sectional view of the same as above. FIG. 12 is a plan view of the camshaft phase adjusting member. Sectional view FIG. 14 is a sectional view of the block claw of the device of the present invention. FIG. 15 is a side view of the same as above. Enlarged Figures 17 and 18 are explanatory diagrams showing the reference line. Figures 19 and 20 are explanatory diagrams showing the operating state of the gears of the drive gear case. Figures 21 and 22 show the relationship between the cam axis center locus and the closed loop curve. Fig. 23 and 24 are front view and plan view of rice transplanter. Fig. 25 is a cut plan view corresponding to Fig. 1 using a chain. Fig. 26 (a), (b) and (c) are drive using chain. It is an explanatory view of a case. (18) …… Seedling stand (19) …… Float (20) …… Transmission case with plant (23) …… Transmission shaft (24) …… Sun gear (25) …… Sun gear phase adjustment member (28) ...... Drive case (30) …… Intermediate gear (32) …… Cam shaft (33) …… Planet gear (34) …… Cam shaft phase adjustment member (37) …… Plant claw case support member (41)… … Cam (N) (K) …… Reference line (W ₁ ) (W ₂ ) …… Line connecting seedling pick-up position and seedling planting position

Claims (1)

[Claims] 1. A drive case, in which a planetary gear mechanism utilizing an eccentric gear is installed, is fixed to an input shaft to which power is transmitted from a power source, and the drive case is attached to the drive case by a proper distance in the radial direction from the input shaft. Cam shafts are provided at different positions in equal parts in the circumferential direction of rotation of the drive case, and the cam shaft is configured to rotate once in the opposite direction of the rotation of the drive case during one rotation. In a seedling planting device having a rotary type planting claw with a planting claw case supporting member fitted outside, and having a planting claw case on the planting claw case supporting member, the maximum eccentric position of each gear in the planetary gear mechanism is The reference line that connects the respective axes aligned on the same side on a straight line is inclined so that the seedling placing table side is downward, and the planting claw tip and the planting claw case are on the upper side with respect to the reference line. Draw a line connecting the center of the cam shaft on which the support member is fitted. NaeUe apparatus characterized by being configured to allow location.