JPH0746936B2 - Rotary planting device for rice transplanters - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a seedling planting device for a rice transplanter for dividing seedlings one by one from a seedling mat on a seedling carrier and then planting them in a field.

(Prior Art) As disclosed in Japanese Patent Application No. 59-256171, there is a conventional pawl transmission case, i.e., a drive case, in which a pawl shaft, i.e., a camshaft, is driven via a sun gear, intermediate gears, and planetary gears provided in the drive case.

The seedling planting device of the rice transplanter described above is designed so that during one rotation of the drive case, the planting claw case rotates once in the direction opposite to the rotation of the drive case.

(Problem to be solved by the invention) As described above, in the case of a system that uses a planetary gear mechanism in the drive case to drive the planting claws, the planting claw case is mounted away from the drive case, which has the drawback that mud or straw can accumulate between the planting claw case and the drive case, causing problems with driving.

(Means for solving the problem) Therefore, the technical problem of the present invention is to obtain a rice transplanter in which mud and straw do not adhere between the planting claw case and the drive case. The technical means of the present invention for solving this technical problem is a rice transplanter in which a drive case is fixed to a transmission shaft to which power is transmitted from a power source, a camshaft is provided on the drive case at a position an appropriate radial distance from the transmission shaft to which it is attached and at equal intervals in the circumferential direction of the rotation of the drive case, and a planting claw case support member is fitted onto the camshaft so that it rotates once in the opposite direction to the rotation of the drive case during one rotation of the drive case, and the rice transplanter is equipped with a planting claw case equipped with planting claws on the planting claw case support member, and a flange portion is provided integrally with the planting claw case support member adjacent to the bearing portion cover of the planting claw case support member on the drive case, and the base of the planting claw case is fitted onto the flange portion, and the planting claw case base, which has a straight back surface, and the flange portion are fastened and attached with bolts on both sides of the planting claw case base from the planting claw case side.

(Effects of the invention) According to this technical means, a flange portion is provided integrally with the planting claw case support member close to the bearing portion cover of the drive case of the planting claw case support member, the base of the planting claw case is fitted into this flange portion, and the planting claw case base and the flange portion are fastened with bolts from the planting claw case side on both sides of the planting claw case base.Therefore, the bolt heads are not on the drive case side, and therefore the distance between the flange portion and the bearing portion cover of the planting claw case support member on the drive case can be made as small as possible, which prevents mud or straw from adhering between the planting claw case and the drive case, thereby preventing operation from being hindered.

In addition, the bolts are attached from the planting claw case side, making them easy to remove and install.

The above points can be explained in more detail as follows: The planting tenon case rotates once via the planting case support member in the opposite direction to the rotation of the drive case during one rotation. If the planting tenon case is attached at a distance from the drive case, mud or straw will get in between the planting tenon case and the drive case during rotation, hindering the rotation of the planting tenon case relative to the drive case. Therefore, it is desirable for the planting tenon case and the drive case to be attached in close proximity to each other, leaving no room for mud or cracks to get in between them. Since the flange of the planting tenon support member of the present invention is close to the planting tenon support member bearing cover of the drive case, mud or straw will not get in between the planting tenon case and the drive case. In addition, the flange of the planting claw case support member and the base of the planting claw case are fastened with bolts from the outside of the planting claw case, not from the drive case side, and if the bolts were attached from the drive case side, the bolt heads would be interposed between the flange of the planting claw support member and the drive case, making it impossible to narrow the gap between the flange of the planting claw support member and the drive case, creating a gap that allows mud and straw to get in. Also, attaching the bolts from the drive case side is effectively difficult because it is obstructed by the planting transmission case of the drive case.

In addition to the above, the present invention has the advantage that by bringing the flange portion of the planting claw support member closer to the bearing portion cover, the planting claw case can be brought much closer to the drive case, allowing the planting claw case to be driven smoothly, and the structure of the support portion of the planting claw case can be made strong.Since the flange of the planting claw case support member and the planting claw case base are fastened together with bolts on both sides of the planting claw case base, the planting claw case support members and bolts are arranged in a triangular shape, and the planting claw case is firmly supported on the drive case.In addition, since the back of the planting claw case base is formed in a straight line, there is no interference with the subsequent planting claw case, and there is no unnecessary excess material compared to cases where the base protrudes from the back.

Furthermore, since the flange portion of the planting claw case support member is constructed integrally with the main body, the number of parts is reduced and assembly is easier than in a system in which a separate flange is attached to the boss portion with a knock pin.

Furthermore, even if the flange portion of the planting claw case support member is close to the bearing portion, the bearing portion will not be damaged because there is a cover on the bearing portion, and the cover prevents mud, straw, etc. from entering the bearing portion.

(Example) First, we will explain the riding rear-planting rice transplanter as a whole.

(1) shown in Figures 18 and 19 is a passenger vehicle body, and a planting unit (3) is connected to the rear of this passenger vehicle body (1) via a lift mechanism (2).

The passenger vehicle body (1) has a transmission case (5) attached to the rear of a body frame (4), an engine (6) mounted on the body frame (4), and a front wheel (7) below the engine (6).

Also, there are transmission cases (8) extending rearward from both the left and right sides of the transmission case (5).

At the rear end of the transmission case (8) is the rear wheel (9). (10)
is the driver's seat, (11) is the footrest, and (12) is the driving handle.

A top link (14) and a lower link (15) are attached to the lift mechanism (2), and the planting section (3) is raised and lowered by swinging the links (14) and (15) by extension and contraction of a hydraulic cylinder (not shown).

In the figure, (16) indicates the mounting bracket for the hydraulic cylinder link.

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

The planting section (3) consists of a seedling carrier (18), a float (19) and a transmission case (20).

(21) is the marker, and (22) is the float raising/lowering lever.

The seedling planting device of the rice transplanter described above will be described in more detail as follows.

1 to 13 show a forced extrusion claw, and the transmission shaft shown in FIG. 1, that is, the input shaft (23), is rotatable relative to the planting transmission case (20).

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

A sun gear (24) is loosely fitted onto the transmission shaft (23).

However, it is fixed to the planting transmission case (20) via a sun gear phase adjustment member (25).

The member (25) has a fan-shaped arm (25) as shown in Figs.
The boss portion (25b) at the end of the sun gear (24) has a groove (25c), and the groove (24a) that matches the groove (25c) is located on the sun gear (24) as shown in FIG. 8. The matching positions of the grooves (25c) and (24a) are changed, and a key (56) is inserted across the grooves (25c) and (24a).
The sun gear (24) is fitted into the planting transmission case (20) and a bolt (27) is inserted into the arc-shaped slit groove (26) in the sector part of the arm (25a) to fix it to the planting transmission case (20), thereby changing the relative position of the sun gear (24) with respect to the planting transmission case (20).

Although multiple grooves (25c) are shown in the figure, only one groove is required to ensure phase alignment. A hollow, two-piece drive case (28) is mounted on the end of the transmission shaft (23), and the drive case (28) is attached to the transmission shaft (23) after adjusting its position relative to the upper stop device of the planting claws, and is fixed to the transmission shaft (23) with bolts (29). The end of the transmission shaft (23) is made square to allow for position adjustment, and this fits 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) with the same number of teeth as the sun gear (24).
The intermediate gear (30) on the intermediate shaft (31) is rotatably mounted on the cam shaft (32) as a mounting shaft. The sun gear (2) is always engaged with the intermediate gear (30) on the intermediate shaft (31).
A planetary gear (33) having the same number of teeth as the planetary gear (4) is fitted to the planetary gear (33) via a support member (to be described later).

These include the sun gear (24), intermediate gear (30), and planetary gear (33).
is a gear that is eccentric from the center of rotation by an appropriate distance (e) as shown in FIG.

The camshaft (32) is also attached to the drive case (28) via a position adjustment member (34) shown in FIGS.

The member (34) is attached to the camshaft (32) and fixed to the drive case (28) by a bolt (35). The bolt (35) is inserted into a slit groove (36) provided in the member (34) so that the member (34) can rotate.

1 and 7, a support member (37) is fitted onto the camshaft (32), and a planting claw case (38) and the planetary gear (33) are fixed to the support member (37).

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

The support member (37) has a flange (37a) protruding from it close to the cover (28b) of the bearing (64) in the drive case (28).
The base (38a) of the nozzle (38) is fitted to the nozzle (38).

(39) is a bolt that fixes the base (38a) of the planting claw case (38) to the support member (37) from the planting claw case side, and is inserted into the bolt holes (60) of the planting claw case base (38a) and the flange (37a), and (40) is a bearing interposed between the support member (37) and the camshaft (32).

Also, as shown in Figures 3, 5 and 6, the planting claw case (38)
The rear surface (38b) of the base is linear, and bolts (39) are attached to both sides of the rear surface (38b).

A cam (41) is provided on the camshaft (32), and a push arm (42) that contacts this cam (41) drives a push rod (described later) via an intermediate shaft (57), and at the intersection there is a spring (43), and in contrast thereto there is a cushion rubber (44).

Therefore, the push arm (42) is biased by the spring (43) and the cushion rubber (44) pushes the planting claw case (38)
is buffered against

As described above, the camshaft (3) provided in the drive case (28)
2), the planting claw case (38) is rotatably supported, the planting claw case support member (37) and the planetary gear (33) are connected and fixed, a bearing (40) is provided between the camshaft (32) and the planting claw case support member (37), and a bearing (64) is provided between the drive case (28) and the planting claw case support member (37). This reduces the width of the support part of the planting claw case, preventing interference with the seedlings being planted, and the camshaft can have only one bearing, resulting in a lightweight structure, while the weight is supported by the bearing on the side where the weight is applied, resulting in a strong structure.

The structure of the push-out claw portion will now be explained in more detail with reference to FIGS. 3 to 6. The push arm (42) is pivoted on a shaft (48), and the end (42a) comes into contact with the cam (41).

The upper surface of the tip (42b) of the push arm (42) is in contact with a cross-sectional washer (49), and the spring (43) is in contact with the washer (49).

Also, the tip of the push arm (42) is fitted with a cushion rubber (4
Specifically, the push arm (4
The cushion rubber (44) is fixed to an intermediate shaft (57) arranged in an L-shape at the tip of the spring (2), and the push rod (47) is operated from the intermediate shaft (57) via a connecting fitting (61) as shown in Figures 3 and 4.

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

When the drive case (28) as a rotating body rotates in the direction of arrow A as shown in FIG. 17 by the transmission shaft (23) which is its rotation axis, the intermediate gear (30) meshing with the non-rotatable sun gear (24) rotates in the direction of arrow A as shown in FIG. 17 by the transmission shaft (23) which is its rotation axis.
As the intermediate gear (30) rotates, the planting claw case support member (37) rotates in the direction of arrow B by the same rotation angle as the rotation of the intermediate gear (30) via the planetary gear (33). The planting claw case support member (37), which is linked to this intermediate gear (30) via the planetary gear (33), rotates in the direction of arrow C, that is, in the opposite direction to the rotation direction of the drive case (28), due to the rotation of the intermediate gear (30). Therefore, the planting claw case (38) as a planting rod rotates around the drive shaft (23) in an attitude facing the seedling carrier. During this rotation, as the side facing the seedling carrier (18) descends from top to bottom, the tip of the planting claw (45) separates just one seedling from the seedling mat on the seedling carrier (18), and then plants it on the field surface at its lowermost descent point. Thereafter, the planting claw (45) rises above the field surface, and the push-out claw (46) pushes out the seedling during planting, so that the seedling separates from the planting claw.

Next, we will explain the block claws shown in Figures 14 and 15. The structure of the transmission shaft (23) relative to the planted transmission case (20), the structure of the drive case (28), and the structure of the camshaft (32) are the same as those of the forced extrusion claws, so the same parts are given the same reference numerals.

The planting claw case (38) is configured such that the opening/closing rod (50) that contacts the cam (41) is freely rotatable around an intermediate pivot point (51) and drives an operating arm (53) that rotates the opening/closing claw shaft (52).

Therefore, the opening and closing claw (55) rotates about the opening and closing claw shaft (52) relative to the fixed claw (54), thereby opening and closing the claw. The timing of opening and closing the blocking claw is adjusted by the adjustment member (34).

Now, again, while the drive case (28) shown in FIG. 17 is rotating in the direction of arrow A, each planting claw case (38) rotates in the direction of arrow C.
That is, by rotating in the direction opposite to the rotation direction of the drive case (28), the cam (41) in each planting claw case (38)
When the tips of the claws (54) (55) of the opening/closing rod (50) that contacts the planting claw case (38) enter the field at a planting position near the lowest limit of the planting claw case (38), the opening/closing rod (50) rotates based on the shape of the cam (41), causing the opening/closing claw shaft (52) to rotate via the operating arm (53), causing the opening/closing claw (55) to separate from the fixed claw (54), and planting the seedlings securely in the field soil.

As shown in FIG. 17, in either the forced extrusion claw or the block claw, the sun gear (24), intermediate gear (30), and planetary gear (33) are all configured as eccentric gears eccentric by an amount e. Therefore, as the drive case (28) rotates in the direction of arrow A, the support member (37) revolves. The accompanying rotation of the support member (37) itself in the direction C during one rotation is configured to be faster or slower than the rotation speed of the drive case (28) due to the difference in the meshing pitch radius of the eccentric gears (24), (39), (30), and (33) relative to the rotation axis. Therefore, the time when the rotation of the planting claw case (38) in the direction C slows down relative to the rotation of the drive case (28) is determined by the time when the planting claw case (38) moves from the seedling picking position to the planting claw case (33).
8) and the time when the planting claw case (38) rotates faster in the C direction corresponds to the time when the planting claw case (38) ascends to its upper limit of ascent. By setting these so that each planting claw case (38) descends to approach the field, it lags behind the rotation of the drive case (28) in the C direction and rotates slowly on its own while changing its orientation downward by revolution when descending to approach the field, and when ascending to its upper limit of ascent after planting, it advances in the C direction more than the rotation of the drive case (28) and rotates on its own while changing its orientation upward, so that the closed loop of the movement trajectory of the claw tip is curved on one side and is an elliptical closed loop curve that is closer to a straight line on the other side, as shown in Figure 16.

Furthermore, as shown in Figure 17, when the phase position of the sun gear is displaced from position D to position E by an amount θ' in the opposite direction to the rotational direction of the drive case, the maximum eccentric position changes, so the position of the reference line is changed and the planting trajectory shifts from the trajectory (X) before the displacement to (X'), as shown by the dotted line in Figure 16.

Furthermore, when the phase position of the sun gear is displaced from position D to position F by an angle (θ") in the same direction as the rotational direction of the drive case, the planting claw trajectory shifts to the trajectory (X") before the displacement, as shown by the dotted line.

The above-mentioned change in the movement locus can adjust the amount of seedlings to be taken out, and the X" position is when the amount of seedlings to be taken out is small, and the X' position is when the amount of seedlings to be taken out is large.

The base (38a) of the planting claw case (38) is fitted to the planting claw case support member (37) and is fastened to the flange (37a) of the planting claw case support member (37) on which the planetary gear (33) is attached by a bolt (3
9), but the planetary gear (33) attached to the planting claw case support member (37) is attached with its position adjusted in relation to the upper stop device of the planting claw, so that the rotation of the cam shaft (32) by the adjustment member (34) results in a rotational displacement relative to the planting claw case (38).

In any case, the present invention has a planting claw case support member (37) located close to the bearing cover body (28b) of the drive case (28).
A flange portion (37a) is integrally provided on the flange portion (37a)
The base (38a) of the planting claw case (38) is fitted to the flange (37a) of the planting claw case (38).
Since the bolts (39) are fastened from the planting claw case side, the planting claw case (38) and the flange portion (37a) can be brought much closer to the drive case (28), and operation can be performed smoothly without mud or straw adhering between the planting claw case (38) and the drive case (28).

In addition, since the bolt (39) is inserted from the planting claw case (38) side, the bolt can be easily removed and attached.

The flanges (37a) of the planting claw case support members are fastened to the rear of the planting claw case by bolts (39) on both sides of the straight portion of the rear of the planting claw case.
The planting claw case base (38a) is attached to the rear surface of the planting claw case, so that the support members and bolts are arranged in a triangular shape to firmly support the planting claw case.
b) Since it is linear, the planting claw case rotates smoothly without forming excess material while avoiding interference with the following planting claw case.

Furthermore, since the flange portion (37a) is formed integrally with the support member (37), the number of parts is small and assembly is easy. Furthermore, since the bearing portion (64) has a cover (28b), even if the flange portion (37a) comes close to the bearing portion, the bearing portion will not be damaged, and mud or straw will not get into the bearing portion.

Although the embodiment is shown as a planetary gear unit, power transmission within the drive case may be performed by a chain transmission using an eccentric sprocket and a chain.

[Brief explanation of the drawings]

1 is a cutaway plan view of the forced extrusion claw of the device of the present invention; FIG. 2 is a side view of the same; FIG. 3 is a partially cutaway side view of the planting claw case attached to the forced extrusion claw; FIGS. 4(a) to (e) are a cutaway plan view of the planting claw case attached to the forced extrusion claw, a front view and a side view of the connecting fitting, and a front view and a side view of the cushion rubber; FIG. 5 is a side view of the planting claw case attached to the forced extrusion claw; FIGS. 6(a) to (d) are a partially cutaway side view of the same, and a plan view, a front view, and a side view of the washer; Figure 8 is an enlarged cross-sectional view of the device of the present invention; Figure 9 is a rear view of the forced extrusion claw; Figure 10 is a plan view of the sun gear phase adjustment member; Figure 11 is a cross-sectional view of the same; Figure 12 is a plan view of the camshaft phase adjustment member; Figure 13 is a cross-sectional view of the same; Figure 14 is a cross-sectional view of the block claw of the device of the present invention; Figure 15 is a side view of the same; Figures 16 and 17 are explanatory diagrams showing the operating state of the gears of the drive case; Figures 18 and 19 are front and plan views of the rice transplanter. (18)...Seedling carrier (19)...Float (20)...Planting transmission case (23)...Transmission shaft (24)...Sun gear (25)...Sun gear phase adjustment member (28)...Drive case (30)...Intermediate gear (32)...Camshaft (33)...Planetary gear (34)...Camshaft phase adjustment member (37)...Planting claw case support member (37a)...Flange (38)...Planting claw case (38a)...Base of planting claw case (39)...Bolt (41)...Cam

──────────────────────────────────────────────────── Continued from the front page (72) Inventor: Tokizo Yuzawa 341 Inadera, Amagasaki City, Hyogo Prefecture, Kanzaki Kokyukoki Seisakusho Co., Ltd. (56) References: JP 61-135512 (JP, A)

Claims (1)

[Claims] [Claim 1] A rice transplanter equipped with a planting claw case, in which a drive case is fixed to a transmission shaft to which power is transmitted from a power source, a planting claw case support member is fitted to the drive case at a position an appropriate radial distance from the transmission shaft to which the drive case is attached and at equal intervals along the rotational circumference of the drive case, the planting claw case support member being fitted to the drive case so that the camshaft rotates once in the opposite direction to the rotation of the drive case during one rotation of the drive case, and the planting claw case is equipped with a planting claw on the planting claw case support member, a flange portion is integrally formed on the planting claw case support member close to the bearing portion cover of the planting claw case support member on the drive case, the base of the planting claw case is fitted onto the flange portion, and the planting claw case base, which has a straight back surface, and the flange portion are fastened with bolts from the planting claw case side on both sides of the planting claw case base.