KR100219363B1 - Transplanter - Google Patents

Abstract

In order to reduce the weight and compactness of the rice transplanter having a seedling seedling device, the feed case 10 of the seedling seedling device 3 receives an input shaft 16 and a horizontal feed shaft that receive power from the traveling body 1. 17), a horizontal feed transmission mechanism (C) for shifting the power from the input shaft 16 to the horizontal feed shaft (17), and driving the power from the input shaft (16) to the transmission case (18). In the output shaft 19 (150a) to be transmitted, a drive body (24) driven and driven by the power from the input shaft (16) is supported on the horizontal feed shaft (17), and the drive body (24) is supported. A passive body 21 interlocked with the input shaft 16 is rotatably fitted to one thread of the input shaft 16, and the shaft portion 21A of the passive body 21 is connected to the feed case 10. Protrudes to the outside of the and the longitudinal seedling for driving the seedling vertical feed mechanism 41 to the protruding shaft portion 21a. Characterized in that praise 39 is in the connectable.

According to this configuration, the shaft portion 21A of the passive body 21 fitted to the end of the input shaft 16 functions as an output shaft for driving the vertical feed shaft 39. For this reason, it is possible to reduce the number of shafts in the feed case by leaving the necessary functions as it is, and furthermore, the weight of the feed case can be reduced, and the feed case can be further compacted.

Description

Rice transplanter with seedling planting device

The present invention relates to a rice transplanter having a seedling seedling device, and more particularly, to a technique for compacting or reducing the weight of the seedling seedling device while maintaining the functions required as a seedling seedling device as conventional.

At first, the present invention focuses on the possibility of compactness or light weight in a feed case among seedling seedling devices. Each function of the fit case includes power transmission to the electric case, reciprocation in the horizontal direction of the seedling placing stage (horizontal feeding), horizontal transfer shifting to variably set the speed of this horizontal feeding, and placing on the seedling placing stage. There is a movement in the vertical direction of the seedlings placed (vertical feed) and driving of this vertical feed. Therefore, in the feed case, generally, an input shaft powered by the feed case, a horizontal feed shaft connected to a horizontal feed spiral shaft outside the case, a first output shaft for driving a vertical feed shaft geared with the input shaft, and a second interlocked chain with the vertical feed shaft An output shaft is provided (for example, see Japanese Patent Laid-Open No. 6-141635).

The rice transplanter runs a wet field, so that the mother has the necessary functions for work, and the lighter side is less likely to sink the running wheels and lessen the rice fields. In other words, the same number of plants is used, the lighter the weight of the rice transplanter is.

From this killing, the present invention focused on omitting the first output shaft for vertical feed shaft driving from the feed case. This is considered to be solved by using a technique for interlocking the longitudinal feed shaft with the eccentric cam at the protruding portion of the case of the horizontal feed shaft, for example, as shown in Japanese Unexamined Patent Publication No. 2510933. However, this means requires a new interlock mechanism outside the feed case, even if the feed case itself is light and compact. Therefore, it is difficult for the apparatus as a whole to obtain advantages in terms of required space and weight. In addition, there is an unfavorable situation that a mud or trash is attached to an interlocking mechanism that does not exist in the past, and there is a possibility that new movement may be hindered. An object of the present invention is to reduce the number of shafts in a feed case while maintaining the necessary functions, thereby achieving compactness or light weight in the feed case.

In order to achieve the above object, the present invention is characterized by the configuration of the first substrate. According to this configuration, the function as the first output shaft is formed at the end of the input shaft. This is a result of paying attention to the fact that the first output shaft for vertical feed driving only needs to extend to one side of the feed case, and that there is no function other than shaft support at the end of the input shaft. In the present invention, the shaft portion of the passive body functions as the first output shaft. The passive body is driven by the input shaft through an interlock mechanism while sharing the shaft with the input shaft. In this manner, the input shaft and the one output shaft can be arranged in the conventional arrangement space of the input shaft, and one axis in the case can be reduced while leaving the necessary functions intact.

As described above, the passive body for vertical feed shaft driving is fitted to the end of the input shaft, thereby eliminating the need for a conventional first output shaft dedicated to vertical feed shaft driving. In other words, the passive body combines the vertical feed drive function and the support function of the input shaft. Since one shaft in the feed case can be reduced, the weight of the feed case can be reduced, and the feed case can be further compacted.

Moreover, since this passive body is equipped with a feed case, it is suitable in that there is no drive part, such as an interlocking mechanism, in addition to a feed case in the rice transplanter which is easy to catch mud and garbage. The passive body can be decelerated by interlocking with a driving body provided in the horizontal feed shaft. Therefore, it is also possible to sufficiently slow the driving speed of the drive arm of the longitudinal feed shaft which drives the driven arm on the side of the transverse feed mechanism, so as not to cause durability of the member due to the impact of the car.

In addition to the above configuration, when the shaft portion of the passive body is formed as a cylindrical shaft, it is possible to use an input shaft, a longitudinal feed shaft, and a conventional shaft having a solid section as it is. This passive body is supported by the feed case. For this reason, when the shaft portion of the passive body is formed as a cylindrical shaft, the passive body shape when the support shaft is supported by a single bearing is compared with the case where the input shaft or the longitudinal feed shaft is fitted outside the shaft portion with the cylindrical shaft. Since the conventional input shaft and the vertical feed shaft, which are components, can be used, the number of new components can be minimized, which is advantageous in terms of cost and management.

By the way, a gear mechanism and a chain mechanism exist inside a feed case, and the lubricating oil for these mechanisms is stuck in a feed case. For this reason, when the shaft part of a passive body is made into a cylindrical shaft, it is made to pass in and out of a feed case through the inner space of the cylindrical shaft. This unfavorable situation can be solved by providing a partition shield member between the input shaft and the longitudinal feed shaft in the internal space of the shaft portion of the passive body. By providing such a shielding member, the lubricating oil in the case can be prevented from leaking out, which is ideal. The shield member is satisfied with a lid fixed to the cylindrical shaft.

In a conventional feed case, a horizontal feed shaft and a first output shaft are disposed above and below an input shaft, and a sufficient interaxial distance is taken between the horizontal feed shaft and the first output shaft. When there is a vertical feed shaft coaxially with the input shaft adjacent to the horizontal feed shaft as in the present invention, the tip of the driving arm for driving the vehicle mounted on the vertical feed shaft may interfere with the spiral shaft interlocked with the horizontal feed shaft in the axial direction. There is. Such interference can be avoided by making the protruding direction of the shaft portion of the passive body opposite to the protruding direction of the horizontal feed shaft.

According to the present invention, the horizontal feed transmission mechanism is shifted and driven by selecting any one of a plurality of gear pairs consisting of a drive gear on the input shaft side and a driven gear on the horizontal feed shaft side. This configuration simplifies the structure of the transverse transmission mechanism and makes the operation light. In addition, less space is required for shift operation.

The shift stroke of the shift key needs to be relatively long from one end of the plurality of gear pairs to the other. Therefore, when the shift stroke is simply laid out as a necessary dimension in design, the input bevel gear mechanism and the plurality of parallel gear pairs are separated, and the left and right widths of the feed case are easily increased.

However, in the present invention, the shift path of the shifter for sliding the shift key along the input axis is set in the rotational trajectory of the drive bevel gear as viewed from the front-back direction of the body. By this configuration, the space required for the slide of the shifter can be secured by effectively utilizing the space around the input shaft, which has conventionally been a dead space due to the presence of the input bevel gear mechanism. The space dedicated to the shifter, that is, the width of the feed case can be narrowed.

In the seedling seedling device, it is common to take the structure from which the power from the aircraft is first inputted into the feed case to construct the horizontal feed or vertical feed transmission part of the seedling mounting base, and then transfer the power from the seedling seedling transfer case to the plurality of seedling transmission cases. For example, see FIG. 2 of Japanese Patent Laid-Open No. 6-153536. In the prior art shown in the above publication, the output shaft equipped at the end of the feed case and the input shaft of the three-plot-driven transmission case, two relay shafts (17) and five couplings (unsigned) are interlocked to each other. It was directly coupled to the feed case and the input shaft of the center-driven motor case closest to it.

However, in the case of designing a seedling seedling device with a new model or the like, as a result of rationally laying out each part, the feed case and the center seedling transmission case may be disposed close to each other in the left-right direction. In this case, since a coupling arrangement space cannot be taken between the feed case and the seeding transmission case as in the related art, it is necessary to consider a new transmission structure.

In the present invention, the output shaft of the feed case and the mother in the position closest to the feed case in the left-right direction are formed as a series of common shafts with the input shaft of the transmission case (center-driven transmission case). This common shaft can be inserted and removed from the feed case or center drive motor case.

By employing such a common shaft, a connection member such as a conventional coupling is unnecessary, so that the feed case and the inner transmission case of the quantity can be arranged closer to each other. However, if the transmission structure between the common shaft and each case is as it is, since the feed case and the seeding transmission case are also integrated in a state where the common shaft is mounted, it is disadvantageous in assembly work or transportation. However, by allowing the common shaft to be inserted and removed with respect to the feed case or the seedling drive case, the above-mentioned disadvantages can be avoided, and the layout of the seedling seedling device in which the feed case and the seedling drive case are brought closer than before can be realized. .

According to the present invention, the weight reduction and compactness of the whole apparatus can be achieved also in the means for elevating and controlling the seedling seedling apparatus. In this case, it is conceived that the linkage mechanism for supporting the seedling depth adjustment lever and the movable bracket so as to swing up and down is disposed in close proximity to each other. As in the present invention, with respect to the lever guide of the planting depth adjustment lever, the base support point of the link mechanism disposed close to the lever guide is provided, so that the lever guide can also be used as an attachment member of the link mechanism. Since the lever guide and the bracket are made of the same parts, the number of parts can be reduced and the number of fabrication and assembly steps can be reduced.

1 is a side view of the rice transplanter,

2 is a side view of the seedling seedling device,

3 is a schematic diagram showing a transmission structure of a seedling seedling device;

4 is a sectional view showing a transmission structure in a feed case;

5 is a side view illustrating the structure of the seedling vertical conveying mechanism;

6 is a side view showing the main part of the shift operation portion of the horizontal feed shift operation mechanism;

7 is a partially cutaway side view illustrating the vertical adjustment of the sliding rail of the seedling laying stand,

8 is a front view showing the lever guide of the horizontal feed shift lever,

FIG. 9 is a perspective view showing the linkage between the displacement detector port and the planting depth adjustment lever in the case of electrically detecting the lift of the sensor float; FIG.

10 is a side view corresponding to FIG. 9;

11 is a plan view corresponding to FIG. 9;

12 is a control block diagram,

FIG. 13 is a perspective view corresponding to FIG. 9 when mechanically detecting lifting and lowering of the sensor float; FIG.

14 is a configuration diagram showing the linkage between the displacement detection mechanism and the elevating operation lever of FIG. 13;

15 is a plan view corresponding to FIG. 13,

16 is a rear view for explaining the rolling of the seedling seedling device,

17 to 20 is a separate embodiment when the present invention is applied to the rice transplanter of the six-core plant,

17 is a cross-sectional view for explaining the power transmission from the feed case to the rice planting transmission case,

18 is a cross-sectional view showing the coupling of the feed case and the center planting transmission case,

19 is a sectional view showing a state when the common shaft is removed from the feed case;

29 is a cross-sectional view showing a separate structure of the pipe member,

* Explanation of symbols for main parts of the drawings

1: driving body 3: seedling seedling device

10: feed case 16: input shaft

16a: keyway 17: horizontal feed shaft

18: motor drive case 19, 150a: output shaft

21: Passive body 21A: Shaft

21a: protruding shaft portion 24: drive body

28, 29, 30, 31: drive gear 28, 29a, 30a, 31a: engaging groove

32, 33, 34, 35: driven gear 36: shifter

37: shift key 39: vertical feed axis

40: shield member 41: seedling longitudinal feed mechanism

47: driving bevel gear 58: stationary float

58A: Sensor float 70: Planting depth control lever

77: link mechanism 77C: movable bracket

118: center case electric motor 150: common shaft

150b: input shaft C: transverse feed shift mechanism

F: Embedding frame L: Shift path

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

1 shows a lightweight four-ply rice transplanter, 1 is a traveling body, 2 is a parallel quadruple link mechanism, 3 is a seedling seedling device, 4 is a seedling placing base, 5 is a belt transmission mechanism, and 6 is a front part. Mission, 7 is front wheel, 8 is rear wheel, 9 is planting mechanism, 10 is feed case E is engine, W is seedling-like seedling which is placed on base 4.

Since the power from the engine E is input to the front mission 6, the front wheel 7 bearing the front mission 6 is driven. The power input to the front mission 6 is transmitted to the rear tail string 12 via the transmission shaft 11 extending rearward from the front mission 6, thereby obtaining the rear wheel 8. In addition, the moving force is inputted to the feed case 10 through the PTO transmission shaft 13 and the interlocking shaft 14 which are rearwardly driven at the front mission 6, thereby driving the seeding mechanism 9.

The planting mechanism 9 is provided at the rear of the link mechanism 2 so as to be rollable around the front-rear axis X. Moreover, the seedling mechanism 9 can be raised and lowered by driving the link mechanism 2 by contraction of the lifting cylinder 2A.

Planting mechanism (9) is provided in the feed case 10, a rotary case 56, which is rotated by the power transmitted from the feed case 10 through the chain case 18, a pair of the rotary case 56 A mother arm 57 and a plurality of stop floats 58 are provided. Field surface is detected by detecting the height of the seedling seedling apparatus 3 with respect to the surface S based on the attitude | position of the center in the left-right direction (henceforth "a sensor float 58A") among several stop float 58. The seedling seedling device 3 moves up and down (S) (this lifting control will be described later).

In the front part of the driver's seat 96, the main gear lever 60 which operates the gear transmission in the steering handle 59 and the front part mission 8 is arrange | positioned. On the left side of the driver's seat 96, a sub transmission lever 61 for shifting the belt transmission mechanism 5 is disposed. The lifting lever 62 is disposed on the right side of the driver's seat 96. This lifting lever 62 performs lifting control of the seedling seedling device 3 and control of the seedling clutch 85 (FIG. 14) built in the front mission 8.

Next, the transmission structure of the feed case 10 is demonstrated.

3 and 4, the feed case 10 has a longitudinal transmission shaft 15 interlocked with the interlocking shaft 14 to receive PTO power, and a bevel gear interlock mechanism on the longitudinal transmission shaft 15. B) the input shaft 16 interlocked through the input shaft 16, the horizontal feed shaft 17 constituting the horizontal feed transmission mechanism C of the seedling seedling device 3, and each of the rice transplanting transmission cases 18 over the input shaft 16; And an output shaft 19 for power transmission. The bevel gear interlock mechanism B is composed of a driving bevel gear 47 on the longitudinal transmission shaft 15 side and a driven bevel gear 48 on the input shaft 16 side.

The input shaft 16 is supported by the bearing 20 at one end thereof directly by the feed case 10, and the other end thereof through the manual gear 21 (an example of a passive body) 21 fitted therein. ) Is supported by the feed case 10. Further, a drive sprocket 23 is provided between the manual gear 21 and the transverse transfer toilet mechanism C for chain linking the output shaft 19 to the rice transplanting transmission case 18.

At one end of the transverse feed shaft 17, a drive gear (an example of the drive body) 24 engaged with the manual gear 21 is formed to be integrally rotatable. The other end of the horizontal feed shaft 17 is fitted with a coupling 26 for interlocking and driving the spiral shaft 25, and the other end is supported by a bearing 27 via the spiral shaft 25. The horizontal feed mechanism H for reciprocating the seedling mounting base 4 reciprocally is mentioned later.

As shown in FIG. 3, FIG. 4, the horizontal feed transmission mechanism C of the seedling seedling apparatus 3 is comprised by combining four sets of gear pairs from which a reduction ratio differs. That is, the four drive gears 28 to 31 fitted to the input shaft 16 and the four driven gears 32 to 35 fitted to the horizontal feed shaft 17 are arranged in an always engaged state, A shift operation mechanism si having a shift key structure for selecting only one drive gear and rotating it integrally with the input shaft 16 is provided. A long key groove 16a is formed in the input shaft 16, and engagement grooves 28a to 31a are formed in each of the drive gears 28 to 31, respectively, and a shift key 37 shifted by the shifter 36 is provided. It hangs in the key groove 16a. At the distal end of the shift key 37, a convex portion 37a is formed to engage only one of the engaging grooves 28a to 31a. Which of the convex portions 37a is pushed by the shift shaft 38? If it is located in the engagement groove, for example, the first engagement groove 28a, the first speed driving state will appear.

The shifter 36 is freely fitted outwardly on the input shaft 16 in a state where it is engaged with the operation groove 37b of the shift key 37, and is applied to the first speed drive gear 28 and the fourth speed drive gear 31. It is a slide amount in the axial direction as a stroke amount for length.

Then, the shift path L along the input shaft 16 enters the rotational trajectory of the driving bevel gear 47 when viewed from the front-back direction, that is, the shifter 36 immediately crosses the driven bevel gear 48. When the position is close to, the convex portion 37a at the tip of the key is engaged with the single speed drive gear 28. That is, in the first to third speed states, the shift 36 is located in the rotational trajectory of the driving bevel gear 47 in the forward and backward directions. In addition, 49 is a spring member which protrudes and presses the shift key 37 in the axial outer diameter direction, and is engaged with the shifter 36 and each engagement groove 28a-31a reliably.

In the manual gear 21 described above, the shaft portion 21A is formed as a cylindrical shaft and protrudes out of the feed case 10. In the protruding shaft portion 21a of the shaft portion 21A, a vertical feed shaft 39 for driving the seedling vertical feed mechanism 41 is fitted in by the key combination. In the portion of the shaft portion 21A in the feed case 10, the input shaft 1b is fitted into the manual gear 21 so as to be relatively rotatable with each other. In the inner space of the shaft portion 21A, a shielding member 40 for shielding the input shaft 16 and the longitudinal feed shaft 39 is provided. The shielding member 40 is fitted into the shaft portion 21A by indentation and constituted by a lid to prevent leakage of the lubricating oil in the feed case 10.

Referring to FIG. 5, the vertical feed shaft 39, which interlocks with the manual gear 21, includes a pair of drive arms 43 for driving the driven arm 42 of the seedling vertical feed mechanism 41. have. The driving arm 43 bends the steel plate in a U shape to support the pins 45 in the state of supporting both the rollers 44 at the open end side thereof, and at the same time, by the fastening of the bolts 46 inserted into the bent sides. It is fixed to the feed shaft 39. The vertical feed shaft 39 is formed with a recessed portion 39a for fitting the bolt 46 therein. When the bolt 46 is fastened, the vertical transfer shaft 39 has a structure that does not shift in the axial direction. Further, the spiral shaft 25 protrudes on the opposite side of the longitudinal feed shaft 39 with respect to the feed case 10, and allows the rotational trajectory of the driving arm 43 and the spiral shaft 25 to interfere when viewed from the side. have.

By the way, in the horizontal feed transmission mechanism (C), it is necessary to make shift operation possible only when the seedling mounting stand 4 is located at the stroke end of the horizontal feed (a detailed description of the known technology will be given). In the four engagement grooves 28a to 31a, the four gear ratios are set so that the four engagement grooves 28a to 31a are arranged in a straight line only in the transverse stroke end state, and at the same time, the driving arm 43 The posture is made to be constant.

In other words, when the spiral shaft 25 is rotated 13 times, the seedling mounting stage 4 is set to move horizontally from end to end, and in the horizontal feed transmission mechanism C, the gear ratios of 1 to 4 speeds are respectively,

1st speed: 30/13

2nd Speed: 22/11

3 speed: 20/13

4 speed: 16/13

And, the reduction ratio of the drive gear 24 and the manual gear 21 is

26/18 = 13/9

Each is set to.

Therefore, the rotation speed of each drive gear 28-31 when the spiral shaft 25 rotates 13, respectively,

1-speed drive gear (28): 13 × 30 ÷ 13 = 30 revolutions

2 speed drive gear (29): 13 × 22 ÷ 11 = 26 revolutions

3 speed drive gear (30): 13 × 22 ÷ 13 = 20 rotation

4-speed drive gear (31): 13 × 16 ÷ 13 = 16 rotation

All of them become integer multiples of rotation and shift shift of the shift key 37 is performed freely. Moreover, the vertical feed shaft 39 when the spiral shaft 25 rotates 13,

Vertical feed axis (39): 13 × 9 ÷ 13 = 9 revolutions

This is also an integer multiple of the rotational speed, and the driving arm 43 is always in the same posture in the transverse stroke end state.

As shown in Figs. 2, 4, and 7, the transverse shift lever 50 of the manual operation is directly installed at the protruding end of the shift shaft 38. The lever guide 50G of the girly shift lever 50 is formed on the lever guide member 52 of the take-up adjustment lever 51 for adjusting the take-up amount in the longitudinal conveying direction of the seedling placing table 4. have. The adjustment arm 53 of the bell crank structure is linked to both adjustment levers 51, and the front end of this adjustment arm 53 is operated by the operation part of the sliding rail 4A provided in the lower part of the seedling mounting stand 4 ( It is hung on 4a).

In this structure, the relative up-down position with respect to the seedling mounting base 4 of the sliding rail 4A can be changed by operation of the take-up adjustment lever 51. FIG. Specifically, the support stays 18a and 18b are formed in the upper and lower two places of the side surface of each rice transplanting transmission case 18, and the slide bars 54 which can slide in the up-down direction are fitted to these support stays 18a and 18b. Is put in. A sliding rail 4A is provided at the upper end of the slide bar 54. In this state, when the two adjustment levers 51 are operated, the slide bar 54 slides with respect to the support stays 18a and 18b, as shown by the solid line and the broken line in FIG. 7, and the sliding rail 4A moves up and down. .

Each support stay 18a, 18b is equipped with the bush 55 which closely fits with the slide bar 54. As shown in FIG. The bush 55 is made of an elastic deformation material. For this reason, even if there exists some clearance between the slide bar 54 and the support stays 18a and 18b, or even if the slide bar 54 and the support stays 18a and 18b are twisted with each other, a clearance does not arise.

As a result, sand grains or garbage do not enter between the support stays 18a and 18b and the slide bar 54.

In the above embodiment, the shaft portion 21A of the manual gear 21 is formed as a cylindrical shaft, that is, a hollow shaft, but the biaxial portion 21A is formed as a solid shaft, and the input shaft 16 and the longitudinal feed shaft 39 are formed. Each end portion may be formed into a cylindrical shaft to be fitted to the shaft portion 21A from the outside. However, compared with the case where the end portion of each of the pressure shaft 16 and the longitudinal feed shaft 39 is formed into a cylindrical shaft, the shaft portion 21A can be made thicker when the shaft portion 21A is formed into a cylindrical shaft. For this reason, in the case where the manual gear 21 is supported by a single bearing 22, the structure of the embodiment is more advantageous in terms of securing the supporting strength of the manual gear 21.

In the above embodiment, the passive body and the driving body are also gears, but they are not geared to the gear. For example, the passive body and the driving body may be constituted by other passive body and driving body such as a sprocket, and both of them may be made to be rotatable through the chain.

Next, the lifting control of the seedling seedling apparatus 3 is demonstrated in order to maintain the height with respect to the surface S of the seedling seedling apparatus 3 in a predetermined range. Lift control is possible by detecting the lift of the sensor float 58A. In the present invention, examples of electrically detecting the upper and lower portions of the sensor float 58A (FIGS. 9 to 12) and examples of mechanical detection (FIGS. 13 to 15) will be described.

First, an example of electrically detecting the lift of the sensor float 58A is shown.

As shown in FIG. 10, the lower depth of the chain case 18 of the seedling seedling device 3 is supported by a seeding depth adjusting shaft 63 that can swing around the horizontal swing axis Z in the horizontal direction. The support arm 64 swings integrally with the seedling depth adjusting shaft 63. A support point is provided at the tip position of the support arm 64, and the respective stop floats 58 are pivotably supported around the axis Y in the horizontal direction with respect to the support point. The front portion of the stationary float 58 is supported via an inflexible link member 65 so that it can swing up and down about the axis Y of the support arm 64. The planting depth adjustment shaft 63 is provided with a planting depth adjustment lever 70 so as to be able to swing around the planting depth adjustment shaft 63.

Among the plurality of stop floats 58, the center sensor in the left-right direction (hereinafter referred to as "sensor float 58A") is a float sensor 67 for detecting a reference height of the sensor float 58A with respect to the seedling-planting device 3. (An example of "displacement detection opening") is provided. In this embodiment, the float sensor 67 is a potentiometer, that is, electrically detects the lift of the sensor float 58A. 68 is an operation arm for driving the float sensor 67. The longitudinal rod 66 is connected to the front of the sensor float 58A, and the operation arm 68 is connected to the longitudinal rod 66. The float sensor 67 is attached to the movable bracket 77C. A compression spring type sensing spring 69 is provided across the movable bracket 77C and the operation arm 68. The sensing spring 69 pushes the front part of the sensor float 58A downward to pressurize it, and the amount of rocking around the pivot axis Y of the sensor float 58A against this pushing force is applied to the float sensor 67. Is detected.

As shown in FIG. 12, an operation panel (not shown) is provided with a potentiometer type elevating sensitivity setter 71 for setting a target posture of the sensor float 58A with respect to the seedling device 3 by dial operation. It is. The lifting cylinder 2A maintains the correspondence between the set value of the sensitivity setter 71 and the detection time of the float sensor 67, that is, the vertical gap between the seedling seedling device 93 and the surface S is maintained. It is drive controlled to keep it constant. The means for driving control of the lift cylinder 2A is a control unit 73 with a built-in microcomputer, which constitutes the lift control means. The control unit 73 receives the output from the lift sensitivity setter 71 and the float sensor 67 to control the electronic lift control valve 72. The dial of the lifting sensitivity setting device 71 can be set and held at seven positions 1 to 7. The larger the number is operated on the larger side, the higher the side of the target posture of the sensor float 58A, i.e., the lower the control sensitivity.

The seedling depth of seedlings is adjusted by the following structure.

1 and 9 to 11, a transversely facing frame 74 is provided near the swing axis Z of the depth control lever 70. Each front end of the several chain case 18 provided in the horizontal frame 74 is fixed. From the horizontal frame 74, the plate-shaped frame 75 stands up, and the depth-of-plant control lever 70 is inserted through this plate-shaped frame 75. As shown in FIG. The plate-shaped frame 75 is formed with a guide hole 75A for guiding the swing of the planting depth adjustment lever 70 and a locking hole 75B for engaging the lever 70 at the planting depth adjustment position. That is, the plate-shaped frame 75 also serves as a lever guide.

On the front surface (front side of FIG. 9) of the plate-shaped frame 75, two support pins 7b and 7b are installed upward and downward. A pair of upper and lower swinging links 77A and 77B are supported by the support pins 7b and 7b so as to be movable. A longitudinal link is connected to one end side (right side of FIG. 9) of the upper swing link 77A and the lower swing link 77B so as to be relatively swingable. The angle part (the bent part of the movable bracket 77C which abuts against the horizontal frame 74) of the movable bracket 77 which mounts the front sensor 67 also uses this longitudinal link. The other longitudinal link is connected to the other end of the upper swing link 77A and the lower swing link 77B so as to be relatively swingable. The part connected to the horizontal frame 74 among the plate-shaped frames 75 serves as this separate longitudinal link. For this reason, the parallel quadruple link mechanism 77 is formed.

A recess 77a is formed on the other end side of the phase swing link 77A. A fastening pin 70A extending from the rod portion of the seeding depth adjustment lever 70 is hooked into the recess 77a.

In the configuration as described above, when the seedling fill is operated at a position where the adjustment lever 70 swings upward and is shallowly planted, the point position (axial center Y) of the sensor float 58A moves downward. At the same time, the movable bracket 77C is also lowered so that the sensor float 58A does not change the detection value of the float sensor 67. That is, the movable bracket 77C also descends in parallel with the seedling seedling device 3. Thereby, the vertical space | interval of the seedling seedling apparatus 3 and the sensor float 58A becomes wide, and it will be in the state planted shallowly. In the case of planting deeply, the movable blanket 77C is lifted up and planted deeply by simply adjusting the planting depth adjustment lever 70 to the deep planting position.

Next, an example of mechanically detecting the lift of the sensor float 58A in order to perform the lift control of the seedling seedling apparatus 3 is shown.

As shown in FIG. 14, the lifting lever 62 is linked with the mother clutch 85 in the front mission 8. As shown in FIG. The lifting lever 62 is forcibly operated only on the side where the lifting control valve 95 is raised. The sensitivity adjustment lever 86 adjusts the sensitivity in the lifting control of the seedling seedling apparatus 3. 87A is a lever guide of the sensitivity adjusting lever 86, 87B is a lever guide of the lifting lever 62.

When the lifting lever 62 is operated at the foremost "planting position p", the seedling clutch vehicle 85 is turned on and at the same time, the seedling planting device 3 is automatically lifted and controlled to set the height of the surface S. Is maintained. When the lifting lever 62 is operated to the "lowering position d" one stage back, the seedling planting apparatus 3 is automatically lifted and controlled in a clutch clutch off state. At the "neutral position n" of the lifting lever 62, the raising and lowering of the seedling seedling apparatus 3 is stopped in the seedling clutch off state. In the rearmost "rising position u", the seedling seedling device 3 is forcibly raised in the seedling clutch off state.

The lifting lever 62 is connected to the operation lever 88 of the mother clutch 85 in the front mission 8 via the link mechanism 89. The lifting control valve 95 is connected to the lower link 2B of the lifting link mechanism 2 via the check rod 90. When the raising lever 62 is operated at the "rising position u", the raising lever 62 is moved to the "neutral position n" via the check rod 90 when the seedling seedling device 3 reaches the set upper limit. It is pushed back and the raising of the seedling seedling apparatus 3 stops automatically.

The lifting control valve 95 is automatically operated based on the change in the ground pressure acting on the sensor float 58A. For this purpose a sensor rod 91 extends from the front of the sensor float 58A and is connected to one end of the balance arm 92. The balance arm 92 swings about the point P. FIG. The other end of the charging arm 92 is connected to the operation arm 95a of the lifting control valve 95 and the release wire 93 (an example of the sensor wire). In addition, a spring 94 for pressing the sensor rod 91 downward is applied to the balance arm 92. The pressing force in the direction of lowering the sensor float 58A is always applied to the operation arm 95a of the lifting control valve 95. That is, this operation arm 95a is pressurized in the direction which pulls the inner wire 93a of the release wire 93 toward the elevation control valve 95 side.

When the sensor float 58A swings around the axis Y by this configuration, the lifting and lowering control of neutral, rising and falling as described below is performed in conjunction with this swinging. In this example, the lift control valve 95 corresponds to the lift detector means, the sensor float 58A, the sensor wire 93, and the like.

(Neutral control)

When the seedling seedling device 3 is maintained at the target height with respect to the surface S, the sensor float 58A is in the reference position, and the upward ground load acting on the sensor float 58A is equal to the reference value. At this time, the operation arm 95a of the control valve 66 is maintained at the "neutral" position.

(Rising control)

Ascending control is performed when the gas reaches a deep part of the surface, and when the gas is lowered backward, the seedling device 3 starts to settle below the target height. In this case, since the upward ground load acting on the sensor float 58A is larger than the reference value, the sensor float 58A swings upward. As a result, the inner wire 93a of the release wire 93 is pulled, and the operation arm 95a of the lift control valve 95 is converted to the "raised" position from the "neutral" position to shorten the lift cylinder 2A. The seedling seedling device 3 rises. When the seedling seedling apparatus 3 reaches the target height, it returns to the said control neutral state and a lifting operation is stopped.

(Descent control)

The lowering control is performed when the body reaches a shallow point in the surface, or when the body becomes inclined to fall forward, the seedling planting apparatus 3 starts to rise from the target height. In this case, since the upward ground load acting on the sensor float 58A is smaller than the reference value, the upward float load acting on the sensor float 58A is smaller than the reference value, so that the sensor float 58A swings forward. . In this way, the inner wire 93a of the release wire 93 is relaxed so that the operation arm 95a of the elevating control valve 95 is lowered from the "neutral" position by the pressing force given to this operation arm 54a. Is converted to. Then, the lifting cylinder 2A is extended so that the seedling seedling device 3 descends.

When the seedling seedling apparatus 3 reaches a target height, it returns to the said control neutral state and a fall operation | movement is stopped.

In the lift control, the control sensitivity is determined by the reference posture of the sensor float 58A and the downward pressure load (sensor load) applied to the sensor float 58A at the time of control neutralization. In other words, as the posture to the sensor float 58A changes in the lowering direction, the distance from the swing axis Y to the front end of the ground plane becomes larger, so that the sensor float 58A easily swings upward by a smaller ground load than before the adjustment. Lose. On the other hand, as the sensor float 58A changes in the lowering direction at the time of neutral control, the load by the spring 94, that is, the sensor load, becomes smaller. The reference posture and sensor load of the sensor float 58A are adjusted by the sensitivity adjusting lever 86 as follows.

The notch guide groove 87a is formed in the lever guide 87A of the reduction regulating lever 86. The sensitivity adjusting lever 86 is adjustable in seven steps by engaging any of the wife grooves 87a. The sensitivity adjusting lever 86 is supported by one end (the end of the elevating control valve 95) of the outer wire 93b of the release wire 93. The release wire 93 is associated with the sensor float 58A and the operation arm 95a of the elevating control valve 95. By such a configuration, one end of the outer wire 93b is position-joined in the wire length direction because the sensitivity adjusting lever 86 swings back and forth. Here, when one end of the outer wire 93b is displaced to the side falling from the lift control valve 95, the protruding length of the inner wire 93c on the float side is reduced by that amount. Due to this fact, the balance arm 92 swings around the point P, the tip of the inner wire 93c side of the clarification arm 92 rises, and the attitude of the sensor float 58A is at the time of control neutrality. Changes in the lowering direction, and the control sensitivity becomes sensitive as described above. On the contrary, when the said one end of the outer wire 93b is displacement-adjusted to the side close to the lifting control valve 95, the protruding length of the inner wire 93c of the float side will increase by the quantity. Due to this fact, the balance arm 92 swings around the point P, and the tip of the balance arm 92 descends on the inner wire 93c side, so that the attitude of the sensor float 58A during control neutrality changes. It changes in the forward direction, and the control sensitivity as described above is insensitive.

Therefore, when the driver of the rice transplanter adjusts the intensity control lever 86 to seven levels, the driver judges the mud hardness of the rice paddy, and as the mud hardness is soft, the sensitivity of the lift control is adjusted to the sensitive side.

In the example shown in FIGS. 13-15, the seedling depth of a seedling is adjusted by the structure of falling.

The horizontal frame 74 is provided near the swinging axis Z of the planting depth adjustment lever 70. Each front end of the several chain case 18 provided in the horizontal frame 74 is fixed. From the horizontal frame 74, the plate-shaped frame 75 is installed upright, and the planting depth adjustment lever 70 is fitted through the plate-shaped frame 75. The plate-shaped frame 75 is formed with a guide hole 75A for guiding the swing of the planting depth adjustment lever 70 and a locking hole 75B for engaging the lever 70 at the planting depth adjustment position. That is, the plate-shaped frame 75 also serves as a lever guide.

On the front surface (front side of FIG. 13) of the plate-shaped frame 75, two support pins 7b and 7b which face forward are provided. A pair of upper and lower rocking links 77A and 77B are fitted to the support pins 76 and 76 so as to be movable. A longitudinal link is connected to one end side of the upper swing link 77A and the lower swing link 77B so as to be relatively swingable. The angle part (the bending part which abuts against the horizontal frame 74 among the movable bracket 77c) of the movable bracket 77c which mounts the balance arm 92 serves as the vertical link. On the other end side of the upper swing link 77A and the lower swing link 77B, a separate longitudinal link is connected to be relatively swingable. The part connected to the horizontal frame 74 of the plate-shaped frame 75 serves as this separate longitudinal link. As a matter of fact, the parallel quadruple link mechanism 77 is formed.

A recess 77a is formed on the other end side of the phase swing link 77A. An engagement pin 70A extending from the rod portion of the depth-adjusting lever 70 for planting is engaged in the recessed part 77a.

In the configuration as described above, when the seedling depth adjustment lever 70 is oscillated upward and operated at a shallow planting position, the point position (axial center Y) of the sensor float 58A moves downward. At the same time, the movable bracket 77c is also lowered so that the sensor float 58A does not change the detection value of the float sensor 67. That is, the movable bracket 77c also lowers in parallel with the seedling seedling apparatus 3. As a result, the vertical space between the seedling seedling device 3 and the sensor float 58A becomes wider and becomes shallower. In the case of deep planting, only the planting depth adjustment lever 70 is set to the deep planting position, and the movable bracket 77c is lifted up to deeply plant.

Next, the rolling control of the seedling seedling apparatus 3 is demonstrated, referring FIG.

The structure for rolling is a support bracket 78 installed at the rear end longitudinal link 2C (FIG. 1) of the lifting link mechanism 2, a rolling motor 79 provided at this support bracket 78, and a rolling motor ( 79 is composed of a screw shaft 80 which is rotated in both directions by the screw and a nut 81 screwed to the screw shaft (80). Each end of the left and right balance springs 82A and 82B is engaged with the nut 81. The other ends of the left and right balance springs 82A and 82B are respectively locked to the left and right ends of the seedling placing table 4.

The horizontal feed mechanism (H) for reciprocating the seedling placing table (4) horizontally and horizontally is screwed with the spiral shaft (25) and the spiral shaft (25) extending laterally from one end of the feed case (10). At the same time, it is comprised from the movable frame 83 fixed to the seedling mounting base 4. As the spiral shaft 25 is driven in conjunction with the seeding operation, the seedling placing table 4 reciprocates from side to side.

In order to roll the seedling seedling apparatus 3, the rolling motor 79 so that it may become a predetermined rolling angle or horizontally by the detection result of the rolling sensor 84 (FIG. 12) attached to the seedling mounting base 4, and so on. Rotate the nut 81 to move to one side. Then, the balance springs 82A, 82B on the side where the nut 81 has moved are temporarily shortened, and the balance springs 82B, 82A on the other side extend. The seedling laying stand 4 tries to move in the rolling direction to restore the balance by this, but since the seedling laying stand 4 is connected to the seedling seedling device 3 via the horizontal feed mechanism H, The seedling device 3 rolls to the side on which the nut 81 has moved.

On the other hand, when the horizontal feed mechanism H is operated to move the seedling seedling stand 4 to the left and right, the balance springs 82A and 82B on the side to which the seedling placing stand 4 has moved, as opposed to rolling. This extension operation is performed to shorten the balance springs 82B and 82A on the other side. In this way, the collapse of the balance by the movement of the seedling mounting base 4 is supplemented by the expansion and contraction of the springs 82A and 82B.

In this way, the balance springs 82A and 82B are also used as rolling springs. Since these balance springs 82A and 82B are installed in parallel with the screw shaft 25, the balance springs 82A and 82B do not apply the load to the screw shaft 25 unevenly.

Next, with reference to FIGS. 17-20, the power transmission structure from the feed case 10 to the rice seedling transmission case 18 is demonstrated. In addition, since the following invention relates to the transmission structure of the feed case 10 and the seedling transmission case 18 which is closest to this feedcase 10, the rice transplanter of the six-core planter which has three seeding transmission case 18 is provided. The relevant part is shown from. Hereinafter, the seedling transmission case closest to the feed case 10 among the plurality of seedling transmission cases 18 is referred to as a center seedling transmission case 118.

The drive sprocket 23 (FIG. 4) and the driven sprocket 147 which are interlocked with the chain are key-coupled to the output shaft 150a of the feed case 10 to the center chamfer transmission case 118. As shown in FIG. The clutch A is prevented in the input shaft 150b of the center guiding transmission case 118 when the driving sprocket 148 and the well-known stationary stop paddy field are formed. The input shaft 150b is also integrally rotated with the drive sprocket 148 when the clutch body 151 pressurized on the on-side side of the clutch A when the rice field is hung by the spring 149 and the jump clutch D is in the on state. A winding spring 153 that presses and pushes the clutch disk 152 and the drive sprocket 148 as far as possible against the clutch disk 152 is fitted. Of these, only the clutch body 151 is rotatable with the input shaft 150b. When the drive mechanism 9 has a drive load larger than the predetermined value, the jump clutch D becomes off-normal.

That is, the clutch disk 152 and the drive sprocket 148 escape to the right in FIG. 18 against the pressing force of the winding spring 153, so that integral rotation with the clutch disk 152 is impossible.

The output shaft 150a of the piece case 10 and the input shaft 150b of the center drive transmission case 118 are constituted by a series of common shafts 150. The common shaft 150 is inserted into the feed case 10 and detachably inserted. That is, since the driven sprocket 147 and the common shaft 150 are key-coupled in the inserted state, they rotate integrally. On the other hand, if the feed case 10 is moved to the right relatively in this state, it becomes possible to pull out the common shaft 150 (refer FIG. 19).

In order to prevent the driven sprocket 147 from moving freely in the radial direction even when the common shaft 150 is pulled out, the boss portion 10a from the right case portion 10R and the left case portion 10L of the feed case 10. ) Projects toward the driven sprocket 147 and engages and supports the hub portion 147a of the driven sprocket 147. In more detail, the common shaft 150 is supported by a pair of left and right ball bearings 155 inside the center guiding transmission case 118. The inner diameter of the left and right boss portions 10a of the feed case 10 is slightly larger than the outer diameter of the hub portion 147a. For this reason, even when the common shaft 150 is pulled out, since the driven sprocket 147 has the ball bearing 154, it cannot move to the right. The driven sprocket 147 can move slightly until the sprocket portion 147b and the boss portion 10a abut to the left side, but can hardly move in the radial direction. In such a configuration, when the common shaft 150 once removed is attempted to be inserted into the feed case 10 again, the driven sprocket 147 cannot be reinserted because the driven sprocket 147 is inclined or moved in the feed case 10. Can be avoided.

In a state where the common shaft 150 is inserted into the feed case 10, the driven sprocket 147 is set at a predetermined position in the left and right directions by the snap ring 160 and the ball bearing 154.

The ball bearing 154 is provided only in the boss portion 10a of the right case 10R, and is omitted from the left case 10L. Such a configuration is advantageous in the following points.

Since both the feed case 10 and the center seedling transmission case 118 are supported by the seedling frame F, the support portions of the common shaft 150 are not lined up in both cases in accuracy. . However, if only one bearing (ball bearing 154) installed on the case (feed case 10 in the example shown) on which the common shaft 150 is inserted and released, even if there is a slight deviation from the shaft center, Easy to absorb by tilt On the other hand, in the structure which supports the common shaft by two bearings, the rotation of a shaft becomes heavy because the displacement of the shaft center of each case cannot be vanity. For this reason, unfavorable circumstances, such as a fall of durability of a bearing and a large horsepower loss, are easy to occur.

As shown in FIG. 18, the pipe member 156 is hypothesized over the boss portion 10a of the feed case 10 and the boss portion 118a which is common to the common shaft 150 in the center-plot transmission case 118. It is. The pipe member 156 is fitted into the inner circumference of the concealed boss portions 10a and 118a, and cooperates with the seal ring 161, and inside each case of the feed case 10 and the center planting transmission case 118. Seal from the outside. If it is the same as before, a relatively expensive sealing member is press-fitted at the place where the pipe member 156 is fitted.

It is advantageous in that manufacturing cost becomes inexpensive if one inexpensive pipe member and two inexpensive sealing rings 161 are used at this point.

The pipe member may also be configured separately as shown in FIG. 20. In FIG. 20, the pipe member 256 is comprised with the cylindrical material by two layers of the metal base part 256a and the seal part 256b, such as rubber | gum. The pipe member 256 may be inserted as shown by a solid line with respect to the boss portions 10a and 118a, or may be fitted outside as shown by a virtual line.

In addition, it is also possible to make the structure of eliminating a pipe member by directly fitting the both boss parts 10a and 118a.

In addition, the right and left sides of the transmission case (18, 18) is connected to the common shaft 150 by the relay shaft 157 and the coupling 158 as conventionally. A cylindrical cover 159 is provided between the common shaft 150 and the left and right rice transplanting transmission cases 18 and 18 to cover the rotating part.

In the above example, the feed case 10 is a case of the side on which the common shaft 150 is fitted. However, in the present invention, the common shaft 150 may be fixed to the feed case 10, and may be inserted and removed from the rice transplanting transmission case 118.

No content.

Claims (9)

As a rice transplanter having a seedling seedling device 3, the feed case 10 of the seedling seedling device 3 includes an input shaft 16 which receives power from the traveling body 1, a horizontal feed shaft 17, Transmitting the power from the input shaft 16 to the horizontal transfer toilet mechanism (C) for transmitting to the captive feed shaft 17, and transmitting the power from the input shaft 16 to the driving case 18 In the rice transplanter comprised of the output shafts 19 and 150a, The transverse shaft 17 is supported by a drive body 24 which is driven and rotated by the input shaft 16, and a passive body 21 which cooperates with the drive body 24 is connected to the input shaft 16. One end is fitted with the input shaft 16 so as to be relatively rotatable. The shaft portion 21A of the passive body 21 protrudes outside the feed case 10, and the longitudinal feed shaft 39 for driving the seedling vertical feed mechanism 41 is connectable to the protruding shaft portion 21a. Aanggi characterized in that. 2. The shaft portion 21A of the passive body 21 is formed as a cylindrical shaft, and the input shaft 16 is fitted to one end of the shaft portion 21A so as to be relatively rotatable. A rice transplanter, characterized in that the longitudinal isolating shaft (39) is integrally rotatably fitted to the other end of the shaft portion (21A). 3. The shielding member (40) according to any one of claims 1 to 3, wherein a shielding member (40) for shielding the input shaft (16) and the longitudinal feed shaft (39) is provided in an inner space of the shaft portion (21A) of the passive body (21). The rice transplanter which is characterized by having. The rice transplanter according to claim 1 or 2, wherein the horizontal feed shaft (17) and the shaft portion (21A) of the passive body (21) protrude from the feed case (10) in opposite directions. The method of claim 1, The transverse feed-transfer mechanism C is integrally rotatably mounted to the drive gears 28, 29, 30, and 31 and the transverse feed shaft 17, which are mounted to the input shaft 16 so as to be relatively rotatable. Consisting of driven gears (32, 33, 34, 35) meshing with gears (28, 29, 30, 31) and a shifting mechanism (si), The shift operation mechanism si is provided with a plurality of engaging grooves 28a, 29a, 30a, 31a formed in the respective drive gears, key grooves 16a formed in the input shaft 16, and the key grooves 16a. A shift key 37 and one of the plurality of engaging grooves 28a, 29a, 30a, and 31a, which can be slid in a state and which can be engaged with each other, can be engaged by sliding the shift key 37 on the input shaft 16. Rice transplanter, characterized in that consisting of a shifter (36). 6. The shift path L of the shifter 36 is set in the rotational trajectory of the driving bevel gear 47 engaged with the input shaft 16 when viewed from the front-rear direction of the traveling body 1. Rice transplanter, characterized in that. 2. The rice transplanter according to claim 1, characterized in that the input shaft (16) and the output shaft (19, 150a) are connected in a chain transmission manner. The method of claim 7, wherein The feed case 10 and the plurality of planting transmission cases 18 are supported by the planting frame F extending from side to side, The output shaft 150a of the feed case 10 and the input shaft 150b of the center seedling transmission case 118 at the position closest to the feedcase 10 among the plurality of seeding transmission cases 18 are integrally integrated. A rice transplanter characterized in that it is formed as a common shaft (150), and the common shaft (150) can be inserted and removed with respect to the feed case (10) or the center seedling transmission case (118). The method of claim 1, A plurality of stationary floats 58 including a sensor float 58A, a depth control lever 70 for making each position of the sensor float 58A up and down adjustable, and a circumference around the point of the sensor float 58A. Displacement detection mechanism for detecting the vertical swing displacement is further provided, In this displacement detector port, a movable bracket 77C, which is supported to be movable up and down with respect to the fixed portion of the seedling seedling apparatus 3, is installed, and the movable bracket 77C is connected to the seeding depth adjustment lever 70. By interlocking, this movable bracket 77C is capable of vertical movement in synchronism with the vertical displacement of the sensor float 58A, The base of the link mechanism 77 which supports the movable bracket 77C so that the movable bracket 77C can be moved is provided in the lever guide 75 which keeps the seeding depth adjustment lever 70 at an arbitrary operation position. Ianggi.

Images