JP3951680B2 - Seedling planting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seedling planting apparatus used for various transplanting machines such as a rice transplanter, a vegetable transplanter, and a grass transplanter.
[0002]
[Prior art]
Conventionally, as this kind of seedling planting device, an extruded body provided at the tip of a rod-like body by an operation in the protruding direction of the rod-like body provided through the case wall surface by an operating mechanism provided in the case is applied to the field. There is a seedling planting device for planting seedlings.
[0003]
[Problems to be solved by the invention]
However, the conventional seedling planting apparatus is provided with a guide member for slidably guiding the rod-like body in the case, and a seal member is provided between the case and the rod-like body on the outer side of the guide member. Therefore, when the seedling planting work is done because the rod-like body is slightly displaced in the direction intersecting the operation direction of the rod-like body and projecting and retracting, the seal member is damaged and its sealing performance is prolonged for a long time. It cannot be stabilized over time, and the seedling planting device may not be able to stabilize and the muddy water and soil may enter the case with the stick-like body protruding and retracted, and the grease in the case may leak. There was a case where it broke down.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that the rod-like body 47 is operated by the actuation mechanism B provided in the case 40a in the protruding direction of the rod-like body 47 provided through the wall surface of the case 40a. In the seedling planting device in which the extruded body 48 provided at the tip plantes seedlings in the field, the guide member 53 that slidably guides the rod-like body 47 is provided in the case 40 a and the case 40 a is provided outside the guide member 53. A seedling planting apparatus is provided in which an outer seal member 52 is provided between the rod-like body 47 and the inner seal member 54 is provided between the case 40 a and the rod-like body 47 inside the guide member 53. . Therefore, since the outer seal member 52 is provided between the case 40a and the rod-shaped body 47 on the outer side of the guide member 53, when the rod-shaped body 47 protrudes or retracts from the case 40a when planting seedlings in the field. This prevents mud, water, soil, etc. from adhering to the rod 47 and entering the case 40a. Further, since the inner seal member 54 is provided between the case 40a and the rod-like body 47 on the inner side of the guide member 53, when the rod-like body 47 protrudes or retracts from the case 40a when planting seedlings in the field. The oil and grease in the case 40a are prevented from adhering to the rod-shaped body 47 and leaking out of the case 40a. Therefore, it is possible to prevent mud, water, soil, etc. from adhering to the rod-like body 47 and entering the case 40a, and the oil and grease in the case 40a from leaking out for many years, and good seedling planting work can be performed. The
[0005]
The invention according to claim 2 is the seedling planting device according to claim 1, wherein the guide member 53 is formed of a material containing a lubricant. Therefore, in addition to the operation of the invention according to claim 1, since the inner seal member 54 is provided between the case 40a and the rod-like body 47 at the inner side of the guide member 53, the oil in the case 40a is provided on the guide member 53. However, since the guide member 53 itself contains a lubricant, the rod-shaped body 47 can be properly slid and guided to perform a good seedling planting operation.
[0006]
【The invention's effect】
According to the first aspect of the present invention, the outer seal member 52 is provided between the case 40 a and the rod-shaped body 47 at the outer portion of the guide member 53, and between the case 40 a and the rod-shaped body 47 at the inner portion of the guide member 53. Since the inner seal member 54 is provided in the case 40a, when the rod-like body 47 protrudes or retracts from the case 40a when seedlings are planted in the field, mud, water, soil, etc. adhere to the rod-like body 47 and the inside of the case 40a. When the rod-like body 47 protrudes or retracts from the case 40a, oil or grease in the case 40a is prevented from adhering to the rod-like body 47 and leaking out of the case 40a. Therefore, it is possible to prevent mud, water, soil, etc. from adhering to the rod-like body 47 and entering the case 40a, and the oil and grease in the case 40a from leaking out for many years, and good seedling planting work can be performed. Thus, the problems of the conventional example can be solved accurately.
[0007]
In addition to the effect of the first aspect of the invention, the inner seal member 54 is provided between the case 40a and the rod-like body 47 on the inner side of the guide member 53. However, since the guide member 53 itself contains a lubricant, the rod-shaped body 47 can be properly slid and guided to perform a good seedling planting operation.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a seedling transplanter 18 is attached to the rear end of the link 15 projecting rearward from the traveling vehicle body 1 to form a riding type rice transplanter. The traveling vehicle body 1 is configured as follows. A front mission case 3 and left and right rear cases 4 are provided before and after the machine casing 2. A pair of left and right front wheels 5 are mounted on both sides of the front mission case 3, and left and right rear wheels 7 are mounted on each of the left and right rear cases 4. The motor 10 rotates left and right via the front mission case 3 and the rear case 4. The vehicle body 1 reaches the front wheels 5 and the left and right rear wheels 7 and is rotated on a paddy paddy to propel the traveling vehicle body 1. A prime mover 10 is covered with a hood 11 and a seat 12 is provided thereon. When the steering post 8 extends upward at the front end of the machine frame 2 and the handle 9 on the steering post 8 is operated, the left and right front wheels 5 are steered. The left and right rear vertical frames 13 extend upward from a horizontal bar 14 connecting the pair of left and right rear cases 4, and the front ends of the upper link 15b and the pair of lower links 15a are rotatably attached to the respective links 15a, 15b. The rear mounting frame 16 is moved up and down by a hydraulic cylinder 17.
[0009]
The seedling planting device 18 is configured as follows. A transmission case 19 is attached to the attachment frame 16 by a rolling shaft 25. A seedling stage 20 is provided on the transmission case 19 so as to be tilted forward, and five mat seedlings are placed side by side so as to reciprocate left and right. An L-shaped seedling receiving frame 26 having an L-shaped cross section is fixed to the transmission case 19 at the lower end of the seedling mounting table 20, and the end of the mat seedling protruding downward from the seedling mounting table 20 moves left and right on this. Five seedling inlets 27 are provided in the seedling receiving frame 26, and the planting claws 40b of the seedling planting device 21 pass through the respective seedling inlets 27 from top to bottom, and the end of the mat seedling is missing. It is made to tear off.
[0010]
A central float 22 and a pair of side floats 23 are disposed below the transmission case 19, and the muddy surface is slid by the advancement of the traveling vehicle body 1, and each of the planting claws 40b prepares the muddy soil for planting the seedling in advance. It is supposed to be. The transmission case 19 includes a front main transmission case 19a and three vertical cases 19b extending from below the seedling receiving frame 26.
[0011]
A drive shaft 28 that rotates under the power of the prime mover 10 is attached laterally to the rear part of each vertical case 19b, and a rotary case 29 is fixed to the protruding end.
As shown in FIG. 2, the surface of the rotary case 29 far from the vertical case 19 b is fixed to the protruding end of the drive shaft 28, and both are rotated by the power of the prime mover 10. That is, the rotating case 29 is made of aluminum and is formed into a case shape. A metal 29a is inserted on the far side of the rotating case 29. The metal 29a and the drive shaft 28 are integrally rotated by a key 29b. The rotary case 29 is driven and rotated by the drive shaft 28 after being tightened. The sun gear 31 is rotatably attached to the drive shaft 28 in the rotary case 29, and the claw 31a at the inner end of the sun gear 31 is engaged with the claw 30a of the fixed metal 30 fixed to the vertical case 19b so as not to rotate. ing. A pair of planetary gears 33 are arranged at symmetrical positions on the outer peripheral side in the rotary case 29 and mesh with the sun gear 31 via the respective intermediate gears 32 (the two intermediate gears 32 bite the sun gear 31). The planetary gears 33 are engaged with the two intermediate gears 32). The sun gear 31, the intermediate gear 32, and the planetary gear 33 are configured to have the same number of teeth, and the planetary gear 33 is rotated once in the reverse direction when the rotation case 29 rotates once. That is, when the rotating case 29 rotates around the axis of the drive shaft 28, the planetary gear 33 turns around the axis while maintaining the same posture with respect to the ground. The sun gear 31 is provided with its center of rotation eccentrically with respect to the center of the pitch circle, and the intermediate gear 32 and the planetary gear 33 are also provided with eccentricity in the same manner so that they always mesh with each other. Accordingly, the center of the pitch circle of the sun gear 31 is eccentric with respect to the center of rotation, so that the infinite speed motion is transmitted to the intermediate gear 32. This is transmitted to the planetary gear 33, so that the planetary gear 33 makes one rotation around its axis during one turn, and the rotation can be performed in a fast rotation region and a slow rotation region. It will rotate faster or slower.
[0012]
A pair of swiveling shafts 34 fixed to the planetary gear 33 extends leftward from the rotating case 29, and a mounting body 42 is firmly fixed to the protruding end by a cotter 41. A pair of swivel cases 40a are rotatably attached to the respective swivel shafts 34 with the downward planting claws 40b fixed to the ends thereof facing the seedling stage 20 side, and bolts 43 serving as fixtures. And are fastened and fixed to the respective attachment bodies 42. The turning case 40a and the mounting body 42 are formed with mounting portions 40d and 42c protruding in a direction substantially along the rotation plane of the rotating case 29, and the bolt 43 is formed on the mounting portion 42c of the mounting body 42. The swivel shaft 34 is inserted into an arc-shaped elongated hole 42a and is screwed into the female screw of the mounting portion 40d of the swivel case 40a.
[0013]
On the other hand, the protrusion 42b is provided in the mounting body 42 in the radial direction, and a screw 44 is screwed in the circumferential direction at the tip. Then, the head contacts with the turning case 40a to form an engaging portion 40c. When the bolt 43 is loosened and the screw 44 is turned, the head of the screw 44 slightly turns the turning case 40a with the lead. The rotating case 29 is pushed and rotated in the rotating direction (counterclockwise). When the nut 45 is tightened, the position is maintained. Thus, the adjusting mechanism A for finely adjusting the rotation of the attachment body 42 and the turning case 40a around the turning shaft 34 is configured by the screw 44, the nut 45, and the like.
[0014]
Therefore, when the bolt 43 is loosened, the turning case 40a can be rotated by a predetermined amount around the turning shaft 34. After the bolt 43 is loosened, the adjustment mechanism A adjusts the position of the turning case 40a and then the bolt. When 43 is tightened, the turning case 40 a is firmly fixed to the attachment body 42. Then, the sun gear 31 is engaged with and fixed to the fixed metal 30 so that the planting claw 40b has a slightly horizontal posture with the tip raised at the upper part during turning, and a vertical posture directed downward at the lower part. ing.
[0015]
As shown in FIGS. 2 and 3, the extruded body 48 welded and fixed to the lower end of the push bar 47 is configured to move up and down at the lower back part (seedling scraping part) of the planting claw 40 b (note that the push bar 47 and the extruded body 48 are both made of stainless steel, and the push bar 47 is a cylindrical bar). A shaft 38 integral with the cam 39 extends inward from the turning case 40a, and its end is fixed to the rotating case 29 with a claw. That is, the planetary gear 33 rotates relative to the rotation case 29 when the rotation case 29 rotates. Therefore, when the turning case 40a integrated with the planetary gear 33 turns once around the sun gear 31, the cam 39 integrated with the rotating case 29 makes one rotation with respect to the turning case 40a. The cam 39 is connected to the upper end of the push bar 47 with a lever 49 that swings around the pin 50, and when the planting claw 40 b comes to the lower end, the base end of the lever 49 extends from the protruding portion of the cam 39. The spring 51 pushes down the push bar 47 and the pusher 48 pushes down the seedling. When the planting claw 40b rises to a predetermined position, the cam 39 pulls up the push bar 47. In this way, the operating mechanism B for operating the push rod 47 is constituted by the cam 39, the lever 49, the spring 51, and the like.
[0016]
Reference numeral 52 denotes a mud-proof seal, and a push bar 47 having the extruded body 48 fixed to the lower end is provided at a portion protruding from the turning case 40a. The seal 52 is provided with a plurality of lips 52a slidably contacting the outer periphery of the push rod 47. When the push rod 47 protrudes or retracts from the turning case 40a when seedlings are planted in the paddy field, mud is removed. It is provided to prevent water, soil, etc. from adhering to the push rod 47 and entering the swivel case 40a. The seal 52 is a so-called spring-loaded seal in which a spring 52b is attached to the innermost lip 52a to enhance the sealing performance.
[0017]
Reference numeral 53 denotes a bush (non-lubricated bush that does not need to supply a lubricant such as oil) formed of a saddle-bonded gold containing oil, and is attached to a portion where the push rod 47 of the revolving case 40a reciprocates. The push rod 47 has a cylindrical shape having a support guide function for projecting or retracting straight.
[0018]
An oil seal 54 is provided on the upper side of the bush 53, and is a so-called spring-loaded seal provided with a lip 54a slidably contacting the outer periphery of the push rod 47 being fastened to a spring 54b. In order to prevent oil and grease in the swivel case 40a from adhering to the push bar 47 and leaking out of the swivel case 40a when the push bar 47 protrudes or retracts from the swivel case 40a when seedlings are planted in the field. Is provided.
[0019]
Reference numeral 55 denotes a general washer, which is disposed at a position where the lower surface is received by the turning case 40a in a state where the inner hole is passed through the push rod 47. On the upper side of the washer 55, a donut-shaped cushion member 56 made of a rubber material is provided in a state in which the inner hole is passed through the push bar 47. Therefore, when the planting claws 40b plant seedlings in the mud in the paddy field, the base end of the lever 49 is separated from the protruding portion of the cam 39, the spring 51 pushes down the push rod 47, and the pusher 48 pushes down the seedling. When the push bar 47 moves down most, the lower surface of the stopper member 57 fixed to the push bar 47 comes into contact with the cushion member 56 and the downward movement of the push bar 47 is stopped. At that time, even if the stopper member 57 of the push bar 47 abuts against the cushion member 56, the cushion member 56 is an elastic body made of a rubber material, so that the shock is absorbed and the planting of the seedling is not adversely affected. Can be planted. Further, the impact received by the cushion member 56 is received by a washer 55 whose lower surface is received by the turning case 40a, so that the impact is not applied to the oil seal 54, and the oil seal 54 can be prevented from being damaged. The sealing performance of the oil seal 54 is demonstrated, oil and grease in the swivel case 40a can be prevented from leaking out for many years, and good seedling planting work can be performed.
[0020]
Therefore, according to this seedling planting device 21, the non-lubricated bush 53 is provided in the portion where the push bar 47, which fixes the extruded body 48 of the swivel case 40a to the lower end, protrudes, and the push bar 47 is slidably supported. Since a mud-proof seal 52 and an oil seal 54 are provided on the lower side and the upper side of 53, the push rod 47 with the extruded body 48 fixed to the lower end protrudes and retracts straight when planting seedlings in a paddy field. The seedling can be planted properly, and the mud-proof seal 52 arranged below the bush 53 allows the push rod 47 to protrude or retract from the swivel case 40a when planting seedlings in the paddy field. In this case, mud, water, soil, etc. adhere to the push rod 47 and prevent the entry into the swivel case 40a, and an oil seal 54 disposed on the upper side of the bush 53 is used to prevent oil in the swivel case 40a. Grease Preventing the accurately that adhere to the rod 47 from leaking to the outside of the turning case 40a. Therefore, good seedling planting work can be performed.
[0021]
As shown in FIGS. 2 and 4, when the eccentric body 36 is fixed to each planetary gear 33, the resistance arm 35 is pressed by the spring 37, and the planting claw 40 b passes through the seedling opening 27, each gear Rotational resistance is given to the meshing teeth of 31, 32, and 33 so that the tip of the planting claw 40b does not move back and forth due to a backlash of the gear.
[0022]
Next, the operation of the above example will be described. When seedlings are placed on the seedling stage 20 and each part is driven by the prime mover 10, the traveling vehicle body 1 is propelled by the rotation of the left and right front wheels 5 and the left and right rear wheels 7. The load is partially pulled by the leveling floats 22, 23, and 23, and the power is transmitted to the input shaft in the transmission case 19 from the front transmission case 3 side through the transmission shaft. In this way, power is transmitted from the input shaft in the transmission case 19 to the drive shaft 28 via an appropriate transmission route. Then, each rotation case 29 rotates, and the intermediate gears 32 and 32 are planetarily rotated around the sun gear 31 along with the rotation, and the planetary gears 33 and 33 meshing therewith are further rotated.
[0023]
Accordingly, the swivel shafts 34 and 34 are rotated by the planetary gears 33 and 33, and this rotation is rotated while the rotational peripheral speed fluctuates with the same rotational speed as the rotation case 29. This is because the sun gear 31, the intermediate gears 32 and 32, and the planetary gears 33 and 33 are eccentric gears, and the number of teeth of the sun gear 31 and the planetary gear 33 is the same.
[0024]
For this reason, the turning case 40a attached to the turning shaft 34 via the attachment body 42 swings with respect to the rotating case 29 and is planted by the tip of the planting claw 40b attached to the turning case 40a. The locus is a closed loop that is slightly longer in the vertical direction. And this planting claw 40b intervenes from the upper side to the lower side of the seedling dividing port 27 of the seedling receiving frame 26 on the seedling mounting stand 20 side, and divides and engages one seedling that is fed out here. Move to. At this time, the upper surface of the seedling is received by the extruded body 48. The seedlings thus carried to the soil surface are pushed into the soil and planted by the downward movement of the pusher 48 provided at the tip of the push rod 47 operated by the cam 39.
[0025]
Next, means for changing and adjusting the seedling division amount will be described. In order to reduce the amount of seedling division, the bolts 43 and 43 are first loosened. Next, the nut 45 for preventing rotation is loosened and the screw 44 is turned to move the engaging portion 40c with the turning case 40a, so that the turning case 40a is rotated around the axis with respect to the mounting body 42. Is adjusted so that the tip of the planting claw 40b is swung downward. And after adjustment, the nut 45 for rotation prevention is tightened and both are fixed with the volt | bolts 43 * 43.
[0026]
Next, when increasing the amount of seedling division, loosen the bolts 43 and 43 and loosen the locking nut 45, and then first increase the amount of seedling division (reverse to the rotation direction of the rotating case 29). ) The turning case 40a is rotated excessively. After that, the screw 44 is turned to move the engaging portion 40c with the turning case 40a, and the turning case 40a is rotated around the shaft center in the rotation direction of the rotating case 29 with respect to the mounting body 42. Adjust so that the tip of the claw 40b is swung downward. And after adjustment, the nut 45 for rotation prevention is tightened and both are fixed with the volt | bolts 43 * 43.
[0027]
When resistance is applied to the planting claws 40b during seedling splitting and planting, a rotational reaction force is applied to the turning case 40a, the bolts 43 and 43 are loosened, and the seedling splitting amount gradually increases. Although a situation in which the claw 40b collides occurs, the fixing after the adjustment as described above allows fine adjustment to be performed accurately, and the screw 44 of the adjustment mechanism A is rotated by the rotational reaction force of the turning case 40a. It functions as a stopper to prevent seedlings, and even when used for a long time, the seedling division amount does not fluctuate unexpectedly.
[0028]
In the above embodiment, the sun gear 31, the intermediate gears 32 and 32, and the planetary gears 33 and 33 are used as eccentric gears, but the sun gear 31 and the intermediate gear 32 are used. 32, planetary gears 33 and 33 are suitable for planting seedlings as described above using non-circular gears (non-circular gears whose pitch circle is not a perfect circle and is not line-symmetric consisting of continuous teeth) as described above. You may comprise so that the planting operation | movement locus | trajectory of the planting nail | claw 40b may be drawn (refer to Japanese Patent Publication No. 8-8812).
[0029]
FIG. 6 shows a second embodiment, in which the oil seal 54 of the first embodiment is disposed below the bush 53 and above the mud-proof seal 52. If the oil seal 54 is disposed at this position, the oil and grease in the swivel case 40a go to the bush 53. Therefore, the bush 53 may be an ordinary iron-metal joint, which can be produced at low cost and is economical. Further, since there is no oil seal 54 below the cushion member 56, the washer 55 can also be omitted.
[0030]
FIG. 7 shows the third embodiment, in which the upper portion of the push bar 47 of the first embodiment extends long upward and passes through the upper wall surface of the turning case 40a. Even in this state, an example in which the volume of the push rod 47 in the turning case 40a is not changed so that the space volume in the turning case 40a can be kept constant is shown.
[0031]
58 is a bush formed of a saddle joint provided on the upper wall surface of the turning case 40a. The bush 58 is attached to a portion where the upper part of the push bar 47 is extended upward and is reciprocated. The push bar 47 is straightened. It has a cylindrical shape with a supporting and guiding function for protruding and retracting.
[0032]
An oil seal 59 is provided on the upper side of the bush 58, and is a so-called spring-loaded seal provided with a lip 59a slidably contacting the outer periphery of the push rod 47 to a spring 59b. When the upper part of the push rod 47 slides on the upper wall surface of the swivel case 40a when planting seedlings, oil and grease in the swivel case 40a are prevented from adhering to the push bar 47 and leaking out of the swivel case 40a. It is provided to prevent water, soil, etc. from adhering to the push rod 47 and entering the swivel case 40a.
[0033]
Therefore, according to this embodiment, the push bar 47 is guided and supported by the lower non-lubricated bush 53 and the upper bush 58 so as to be slidable at two upper and lower positions. In this case, the shaft center can be prevented from being shaken, and the push bar 47 can be moved straight up and down to prevent the seals 52, 54 and 59 from being subjected to a load in the direction intersecting the sliding direction. The sealing performance of 52, 54 and 59 can be maintained well, and mud, water, soil, etc. enter the swivel case 40a for many years, and oil and grease in the swivel case 40a leak out of the swivel case 40a. This can be prevented appropriately and good seedling planting work can be performed.
[0034]
Further, even if the push rod 47 moves up and down in the swivel case 40a, the space volume in the swivel case 40a can be kept substantially constant, so that the internal pressure of the swivel case 40a becomes substantially constant, and mud, water, soil, etc. are swept into the swivel case 40a. Each of the seals 52, 54, and 59 can appropriately prevent entry into the inside and leakage of oil and grease in the turning case 40a to the outside of the turning case 40a.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding type rice transplanter.
FIG. 2 is a plan sectional view of the seedling planting apparatus.
FIG. 3 is a partial cross-sectional side view of the seedling planting apparatus.
FIG. 4 is a side view inside the rotating case.
FIG. 5 is a plan view of a main part of the seedling planting apparatus.
FIG. 6 is a partial cross-sectional side view of a main part of a seedling planting apparatus showing a second embodiment.
FIG. 7 is a partial cross-sectional side view of a main part of a seedling planting apparatus showing a third embodiment.
[Explanation of symbols]
21 Seedling planting device 40a Case (swivel case)
47 Rod body (push bar)
48 Extruded body 52 Outer sealing member (seal for mud prevention)
53 Guide member (bush)
54 Inner seal member (oil seal)
B Actuation mechanism

Claims (2)

The seedling planting in which the extrudate 48 provided at the tip of the rod-like body 47 by the actuating mechanism B provided in the case 40a in the protruding direction of the rod-like body 47 provided through the wall surface of the case 40a is planted in the field. In the attaching apparatus, a guide member 53 for slidably guiding the rod-like body 47 is provided in the case 40a, and an outer seal member 52 is provided between the case 40a and the rod-like body 47 on the outer side of the guide member 53, and The seedling planting apparatus, wherein an inner seal member 54 is provided between the case 40 a and the rod-like body 47 at the inner side of the guide member 53. The seedling planting apparatus according to claim 1, wherein the guide member (53) is made of a material containing a lubricant.

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