JP3693584B2 - Rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention divides the seedling planting device into two at the intermediate position in the left-right width direction to form left and right seedling planting portions, and the action posture and the respective seedling planting portions that align the left and right seedling planting portions in the adjacent state It is configured so that it can be switched to the retracted posture set to the front-rear orientation, and the vertical seedling that is placed on the seedling platform for each of the left and right seedling planting units is fed out toward the seedling outlet in the planting mechanism. The present invention relates to a rice transplanter equipped with a feed drive mechanism.
[0002]
[Prior art]
Since the rice transplanter as described above is provided with a planting mechanism and a seedling stage for each of the left and right seedling planting units, it is necessary to configure the transmission structure for these devices to be separable.
Therefore, conventionally, a feed case for supplying power to a planting mechanism, a vertical feed drive mechanism, and the like provided for each of the left and right seedling planting units has been provided in each of the left and right seedling planting units. A relay distribution case is provided to distribute power to the left and right feed cases from a driving part provided in the traveling machine body, and an interlocking rod mechanism is provided between the relay distribution case and the left and right feed cases, respectively. The mechanism is configured to be detachable from the relay distribution case, and when the right and left seedling planting parts are divided, the interlocking rod mechanism is removed from the relay distribution case.
Moreover, in the thing provided with the planting mechanism of many strips, the number of the planting mechanisms with which each seedling planting part is equipped was set to the left and right same number (Unexamined-Japanese-Patent No. 10-178831).
[0003]
[Problems to be solved by the invention]
In the case of the above configuration, a feed case is required for each of the right and left seedling planting parts. As the structure is increased, the number of parts is increased and the number of parts to be separated is two. For this reason, the work of separating and the connecting work for switching to the working posture are burdensome.
An object of the present invention is to provide a rice transplanter capable of easily setting the working posture and the storing posture of the left and right seedling planting portions while reducing the labor required for the separation and connection work and reducing the manufacturing cost. .
[0004]
[Means for Solving the Problems]
〔Constitution〕
According to a first aspect of the present invention, a feed case for receiving power transmission from the driving portion is provided on one of the left and right seedling planting portions, and the vertical feed drive shaft of the vertical feed drive mechanism is connected to the other from the feed case. The vertical feed drive shaft belonging to one seedling planting part and the vertical belonging to the other seedling planting part at a portion corresponding to the two-divided position of the seedling planting device. The feed drive shaft is configured to be intermittent via a clutch mechanism, and power is transmitted from the longitudinal feed drive shaft belonging to the other seedling planting portion to the planting mechanism belonging to the other seedling planting portion. The function and effect are as follows.
[0005]
[Action]
By providing the feed case only on one of the left and right seedling planting sections and limiting the transmission shaft provided across the left and right seedling planting sections to the vertical feed shaft, the clutch mechanism that must be separated when switching to the retracted position is It is only necessary to provide the feed shaft only at one location. For this reason, when switching between the action posture and the retracted posture, only one work location needs to be released, which reduces the work load.
〔effect〕
Since the work load is reduced, the switching from the working posture to the retracted posture or from the retracted posture to the working posture can be performed smoothly and quickly, and the divided structure of the seedling planting part can be used effectively.
In addition, since the feed case only needs to be provided in the right and left seedling planting parts, the number of parts can be reduced.
[0006]
〔Constitution〕
  The characteristic configuration of the invention according to claim 2 is:The rice transplanter according to claim 1, wherein the number of planting mechanisms belonging to each seedling planting unit is set to a different number, and a feed case is provided in the seedling planting unit having a larger number of planting mechanisms installed. The lateral feed drive mechanism for reciprocatingly driving the seedling table with a constant stroke is provided, and the operation and effect thereof are as follows.
[0007]
〔Constitution〕
  The characteristic configuration of the invention according to claim 3 is as follows.The rice transplanter according to claim 1, whereinA clutch mechanism capable of intermittently connecting the vertical feed drive shaft belonging to the seedling planting section and the vertical feed drive shaft belonging to the other seedling planting section is configured so that the both vertical feed drive shafts are joined at a constant rotational phase. HaveThe effects are as follows.
[0008]
[Function and effect]
When the vertical feed drive shaft is set to the working posture, it is joined only at a fixed rotational phase, so it is possible to avoid that the vertical feed timing differs between the right and left seedling planting parts. In addition to avoiding inconvenience due to adoption, it is not necessary to provide feed cases for supplying power to the vertical feed drive shaft in the left and right seedling planting parts, providing a structure that can be simplified by a single unit I was able to do it.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows an overall side view of a rice transplanter. This rice transplanter swings a seedling planting device 2 for 10-row planting up and down by operating a hydraulic cylinder 3 at the rear of a riding-type traveling machine body 1. It connects with the traveling body 1 via the link mechanism 4 which can be moved up and down, and is equipped with the fertilizing device 5 for 10 fertilization.
[0010]
The traveling machine body 1 transmits power from the engine 6 mounted on the front thereof in the left-right direction so as to straddle the seedlings for four items via the hydrostatic continuously variable transmission 7 and the gear transmission 8. Driving power is applied to the left and right front wheels 9 and rear wheels 10 disposed at a predetermined interval, and the left and right auxiliary wheels 10A arranged in parallel so as to straddle two seedlings inside the left and right rear wheels 10. As a result, a sufficient thrust corresponding to the ten-row planting can be obtained.
[0011]
At the center of the traveling machine body 1, there are a steering wheel 11 linked to the left and right front wheels 9, a main transmission lever 12 for shifting the hydrostatic continuously variable transmission 7, and an auxiliary transmission lever for shifting the gear-type transmission 8. 13 and the boarding operation part 15 provided with the driver's seat 14 grade | etc., Are formed.
[0012]
The link mechanism 4 has free ends of left and right top links 4A connected to the rear part of the traveling machine body 1 so as to be swingable up and down around the horizontal axis P1 and swings up and down around the horizontal axis P2 at the rear part of the traveling machine body 1. The free ends of the left and right lower links 4B that are connected to each other are connected by a vertical link 4C. The lower end portion of the vertical link 4C is formed so as to rotatably support the rolling shaft 16A extending from the seedling planting device 2 in the front-rear orientation, around the front-rear axis P3. The attachment device 2 can roll around the longitudinal axis P <b> 3 with respect to the traveling machine body 1.
[0013]
As shown in FIGS. 1-6, the seedling planting apparatus 2 includes a connecting frame 16 having a rolling shaft 16A, and a swing frame that is swingably connected to the left and right ends of the connecting frame 16 around a vertical axis P4. 17, a square pipe-shaped support frame 18 connected to the free ends of the left and right swing frames 17 so as to be swingable around the vertical axis P5, a feed case 19 mounted on one support frame 18, and left and right supports Five planting transmission cases 20 connected to the frame 18 at a certain distance in the left-right direction, rotary planting mechanisms 21 pivotally supported on the left and right sides of the rear of each planting transmission case 20, and each planting mechanism A seedling mounting base 22 that reciprocates with a fixed stroke in the left-right direction with respect to 21, and a vertical feed drive mechanism that feeds the mat-like seedling placed on the seedling mounting base 22 to the takeout port of the planting mechanism 21. 55, each planting Four leveling float 23 to advance leveling planting places due to structure 21, and is configured to allow the planting of Article 10, such as by.
[0014]
As shown in FIG. 4, at the front lower part of each planting transmission case 20, a float fulcrum shaft 24 made of a round pipe material laid across to each other is rotated around a horizontal axis P6 as its axis. The rear part of the leveling float 23 corresponding to the extending ends of the plurality of support arms 25 extending rearward from the float fulcrum shaft 24 swings up and down around the horizontal axis P7. It is connected freely.
As shown in FIG. 2, a guide frame 26 that supports the seedling stage 22 so as to be reciprocally movable in the left-right direction has a planting depth adjustment lever 27 that can be swung around the longitudinal axis P8, and this planting. A guide plate 28 for operating and guiding the depth adjustment lever 27 and capable of engaging and holding at a desired operation position is provided.
[0015]
The planting depth adjustment lever 27 is linked to the float fulcrum shaft 24 via the linkage rod 27A. With this, when the planting depth adjustment lever 27 is swung around the front and rear axis P8, the float fulcrum shaft 24 can be rotated around its axis P6, and the height position of each leveling float 23 with respect to each planting mechanism 21 can be changed, so that the seedling planting depth in the field by each planting mechanism 21 can be changed. It can be adjusted integrally.
[0016]
That is, the planting depth adjustment for adjusting the seedling planting depth to the field by each leveling float 23, the float fulcrum shaft 24, the plurality of support arms 25, the planting depth adjusting lever 27, the guide plate 28, and the linkage rod 27A. The mechanism A is configured, whereby seedlings can be planted in the field at an appropriate planting depth in consideration of the mud hardness of the field.
[0017]
The configuration of the seedling planting device 2 will be described. As shown in FIGS. 7 and 9, the seedling planting device 2 includes a left seedling planting unit 2A capable of planting four seedlings and a right seedling planting unit 2B capable of planting six seedlings. It can be divided into two. By dividing the seedling planting device 2 into two parts, the seedling stage 22 is also divided into left and right seedling stage parts 22A and 22B. Thus, by making the seedling planting device 2 into the left and right two-part configuration, the left and right seedling planting units 2A and 2B and the left and right seedling planting units 2A and 2B are connected in a forward-facing posture where the left and right seedling planting units 2A and 2B can be planted. Can be switched to a stowed posture that changes to a sideways posture that reduces the amount of overhang to the side of the aircraft, and is switched to the stowed posture when traveling on the road or when transporting by truck, etc. This can reduce the possibility of contact with other objects.
[0018]
A switching mechanism for dividing the seedling planting device 2 will be described. As shown in FIGS. 7 to 13 and FIG. 17, relative swinging about the vertical axis P <b> 5 with respect to the upper surface of the connecting frame 16 that is connected to the lifting link mechanism 4 of the seedling planting device 2 in a freely rolling manner. The swing frame 17 is connected freely, and a support frame 18 is attached to the lower surface of the front end of the swing frame 17 so as to be relatively swingable. A chain mechanism (an example of an interlocking mechanism) 85 is provided on the upper surface of the swing frame 17 along the longitudinal direction, and the chain mechanism 85 is configured to drive the support frame 18 to switch the posture.
In order to switch the posture of the seedling planting device 2, the left seedling planting unit 2A and the right seedling planting unit 2B are separately driven and oscillated by manually holding one seedling mounting part 22A or 22B. The posture may be changed using a motor or the like.
[0019]
As shown in FIGS. 16 and 17, in order to configure the chain mechanism 85, a support shaft 85A is provided at a connection portion between the swing frame 17 and the connection frame 16, and the lower end of the support shaft 85A is fixed to the connection frame 16. A chain sprocket 86 as a guide body is fixed to the upper end of the support shaft 85A protruding from the upper surface of the swing frame 17 so as not to rotate. On the other hand, on the free end side of the swing frame 17, a transmission rotating shaft 87 is pivotally supported at a connection portion with the support frame 18, and a portion of the transmission rotating shaft 87 protrudes from the upper surface of the swing frame 17. A transmission sprocket 88 as a drive rotating body is attached to be freely rotatable integrally. The number of teeth of the transmission sprocket 88 is set to be half the number of teeth of the chain sprocket 86, and the support frame 18 is driven to swing at a rotational speed double the opposite direction to the swing speed of the swing frame 17. It is. The transmission rotating shaft 87 extends downward to the support frame 18 and is fixed to the support frame 18 via a bracket 18C at the lower end.
[0020]
With such a configuration, when switching the seedling planting device 2 to the split state, it is necessary to perform an operation for switching to a splittable state from the action posture shown in FIG.
That is, although not shown in the drawing, the left and right seedling stage portions 22A and 22B are once integrated with the end portion of one lateral feed stroke by the lateral feed drive mechanism 57. From that state, the upper and lower locks 72 and 73 as the connection locking mechanism of the left and right seedling mounting parts 22A and 22B, which will be described later, and the power transmission system and the operation system are released and set in a separable state. Then, one seedling stage 22A, 22B is operated in the direction of separating. As the unlocking operation, the connection handle 81 for separating the protective frame 79 is operated. Accordingly, the clutch mechanism 29 of the longitudinal feed drive shaft 63 can be separated simultaneously with the separation of the protective frame 79. Further, the linkage between the connection frame 16 and the support frame 18 can be cut off by the release operation to the lock latch 76.
The operation of the lock mechanism including the above lock mechanism will be described in detail later.
[0021]
When one of the left and right seedling mounting parts 22A and 22B is grasped and opened, the swing frame 17 rotates about the support shaft 85A with respect to the connecting frame 16, as shown in FIGS. At the same time, the support frame 18 also rotates about the transmission rotation shaft 87 with respect to the swing frame 17. In this case, the drive mode and the rotation direction are such that when the swing frame 17 rotates with respect to the connection frame 16, the chain sprocket 86 is fixed to the connection frame 16 in the transmission chain 89. Since the transmission chain 89 revolves around the chain sprocket 86 together with the transmission sprocket 88 by the swing, the transmission sprocket 88 rotates relative to the transmission chain 89. The support frame 18 fixed to the transmission rotating shaft 87 by the rotation of the transmission sprocket 88 rotates in the opposite direction to the swing frame 17, and is substantially parallel to the swing frame 17 switched to the front-rear orientation of the fuselage. Become posture.
[0022]
As shown in FIG. 16, the transmission chain 89 is provided with shock absorbing materials 89A and 89A such as springs at the left and right intermediate positions, and has a large skeleton when starting to change the posture or when stopping after the posture change. It is configured to absorb an impact caused by the inertia of the heavy seedling stage 22A. Here, although the form using the power transmission chain 89 is shown, a power transmission cable may be used instead of the power transmission chain 89, and an impact absorbing material can be provided on the power transmission cable.
[0023]
The contents of the configuration in which the seedling planting device 2 is divided into two parts extend to the seedling mounting table 22, the transmission system to the seedling planting mechanism 21, and the like as described below. As shown in FIG. 5, the seedling stage 22 has a left seedling stage 22A divided by five partition walls 22b so as to have four seedlings mounting surfaces 22a, and six seedlings mounting surfaces 22a. It is comprised so that it can divide into 2 with the right seedling mounting base part 22B divided by seven partition walls 22b.
[0024]
The transmission system to the planting mechanism 21 will be described. As shown in FIGS. 3, 6, and 10 to 14, only one feed case 19 that receives planting power from the engine 6 of the traveling machine body 1 is provided in the right seedling planting portion 2 </ b> B. The working power from the gear type transmission 8 is transmitted via the first transmission system B including the transmission shaft 30 and the first clutch 31. The output from the feed case 19 is first transmitted to the power transmission system of the lateral feed drive mechanism 57 with respect to the seedling stage 22 and the power transmission system to the vertical feed drive mechanism 55. The planting power is taken out by branching.
[0025]
As shown in FIGS. 3, 10, and 11, the lateral feed drive mechanism 57 rotates laterally around the horizontal axis P <b> 11 with the power transmitted through the lateral feed transmission 58 provided in the feed case 19. The endless spiral groove 61a formed in the extending part of the feed shaft 61 over the moving stroke length of the seedling mounting base 22 engages and guides the moving body 62 connected to the right seedling mounting part 22B, thereby seedling mounting. The table 22 is configured to reciprocate in a lateral direction with a constant stroke in the left-right direction. The left seedling stage 22A is mechanically linked to the right seedling stage 22B and a connecting mechanism described later, and moves laterally integrally.
[0026]
The left and right vertical feed drive mechanisms 55 will be described. As shown in FIGS. 3, 6, 10, and 11, the seedling stage 22 is moved to the extending portion of the drive shaft 63 for vertical seedling feeding that rotates around the horizontal axis P <b> 12 by the power from the feed case 19. A pair of operating arms 64 are provided with a distance corresponding to the stroke. A one-way clutch 66 is provided on a horizontal longitudinal feed shaft 65 disposed in each of the left and right seedling mounting portions 22A and 22B, and the seedling mounting table 22 reaches the end of the moving stroke of the operated arm 66a of the one-way clutch 66. Every time, the operation arm 64 is used to alternately kick up. The intermittent driving force thus obtained is transmitted to a total of five cylinder shafts 67 loosely fitted to the left and right vertical feed shafts 65 through the respective seed clutch vertical feed clutches 68. Each longitudinal feed belt 69 that is interlocked and connected to each cylinder shaft 67 in a state of being mounted below the placement surface 22a is intermittently driven at a predetermined pitch.
[0027]
As shown in FIGS. 3 and 10 to 12, the working power from the gear type transmission 8 transmitted to the first shaft 19 </ b> A is transmitted to the feed case 19 to the drive shaft 63 for seedling vertical feed. A first chain transmission mechanism 54 and a second chain transmission mechanism 56 that transmits the first drive shaft 19A to the planting drive shaft 53 on the right side are housed. The drive shaft 63 is divided into two at the left and right center positions of the traveling machine body 1 and is interlocked and connected by a right-hand drive shaft 63B that receives power transmission from the feed case 19 and the right-hand drive shaft 63B by a meshing clutch mechanism 29. The left drive shaft 63A.
[0028]
The meshing clutch mechanism 29 includes a sliding engagement claw 29A biased in an engaged state and a fixed engagement claw 29B that is non-slidably attached to the drive shaft 63A. The engaging claws 29A and 29B are configured so that the meshing engagement is completed only when the rotational phases coincide with each other. In other words, each of the engaging claws 29A and 29B is provided with three claw portions, each claw portion is formed in a different phase, and is configured to be engaged only in one rotational phase. It is.
As shown in FIGS. 3 and 10, a transmission case 92 that transmits from the left drive shaft 63A to the left planting drive shaft 53 via the third chain transmission mechanism 91 is provided separately from the feed case 19, and left and right The power transmission system is used for the planting transmission system. As shown in FIG. 14, the working power transmitted to the left and right planting drive shafts 53 includes chain-type transmission mechanisms 59 housed in each planting transmission case 20, each planting clutch 60, and the like. It is transmitted to each planting mechanism 21 via.
[0029]
In short, the seedling planting device 2 can be divided into two parts: a left seedling planting unit 2A capable of planting four seedlings and a right seedling planting unit 2B capable of planting six seedlings. As a result of the configuration, it was necessary to equip 6 pieces each when it was possible to divide into 5 sections. Therefore, each of the planting transmission case 20, the chain transmission mechanism 59 incorporated therein, each planting clutch 60, and each planting clutch 68 for seedling vertical feed can be reduced to five each. Therefore, the configuration can be simplified and the manufacturing cost can be reduced.
Further, since the left and right seedling planting parts 2A and 2B are equipped with the vertical feed drive mechanism 55, as in the case where only the left and right seedling planting parts 2A and 2B are equipped with the vertical feed drive mechanism 55, respectively. When the posture of the seedling planting device 2 is switched, there is no need to intermittently connect the vertical feed shaft 65 provided in each of the left and right seedling planting portions 2A and 2B. In addition to simplifying the operation, it is also advantageous in automating the posture switching operation.
[0030]
Moreover, in the conventional posture switching structure of the seedling planting device 2 (not shown), the power distribution device that distributes the power from the traveling machine 1 to the left and right seedling planting portions 2A and 2B is connected to the connecting frame 16 of the seedling planting device 2. Equipped with a clutch between the power distribution device and the feed case 19 of each of the left and right seedling planting parts 2A, 2B. When the seedling planting device 2 is switched from the retracted position to the working position by intermittently connecting the transmission system over the left and right seedling planting parts 2A, 2B, the left and right seedling planting parts 2A, 2B In order to synchronize the planting mechanism 21 installed in the plant, it is necessary to connect each of the left and right clutches in a state of matching the rotation phase. Is bothered Than it has been to those.
[0031]
However, in the present embodiment, as described above, the first clutch 31 is provided in the first transmission system B that extends between the gear type transmission 8 on the traveling machine body 1 side and the feed case 19 on the right seedling planting part 2B side. In addition, by installing the clutch mechanism 29 on the longitudinal feed drive shaft 63, each transmission system B extending from the traveling machine body 1 to the left and right seedling planting portions 2A and 2B when the posture of the seedling planting device 2 is switched is intermittently connected. Therefore, when switching the seedling planting device 2 from the retracted position to the working position, the clutch mechanism is used to synchronize the planting mechanisms 21 provided in the left and right seedling planting parts 2A and 2B. The first clutch 31 can be connected regardless of the rotation phase, so that when the seedling planting device 2 is switched to the work posture, the first clutch 31 can be connected regardless of the rotation phase. When we can simplify operation In, so that it is possible to also advantageous be automated attitude switching operation of seedling planting apparatus 2.
By the way, each line clutch 60 for planting and each line clutch 68 for vertical feeding of seedlings are switched from the on state to the cut state by five operation levers not shown corresponding to each other, The transmission to the planting mechanism 21 and the longitudinal feed belt 69 is stopped in units of two strips, and by this, planting of fraction strips of less than 10 strips can be performed.
[0032]
As shown in FIG. 6, a total of two one-way clutches 66 and five vertical seedling clutches 68 for three seedling vertical feeds provided on the left and right seedling planting parts 2A and 2B are provided from the left and right ends of the seedling mounting base 22. The one-way clutch 66 is positioned below the eye partition wall 22b, and the strip clutches 68 are positioned below the left and right partition walls 22b and the fifth partition wall 22b from the left and right ends of the seedling stage 22. It is arranged. In addition, below the fifth partition wall 22b from the left end of the seedling mounting table 22, that is, at the divided end of the seedling mounting table 22, each line clutch 68 belonging to the left seedling planting unit 2A and the right seedling planting unit 2B belong to Two of each strip clutch 68 are provided.
Thus, in the state where the seedling planting device 2 is switched to the working posture, the one-way clutch 66 for vertically feeding the seedlings and the respective strip clutches 68 for vertically feeding the seedlings are substantially equal from the left and right center of the seedling planting device 2 to the left and right. Therefore, the right and left balance of the seedling planting device 2 in a state in which it is switched to the working posture can be improved.
[0033]
Further, as described above, the one-way clutch 66 for vertically feeding the seedling is equipped on the drive shaft 63 for vertically feeding the seedling when the operated arm 66a reaches the end of the moving stroke. Therefore, when the one-way clutch 66 is disposed at both the left and right ends of the seedling stage 22, the seedling stage 22 is moved to one of the left and right movement strokes. When reaching the end, the other seedling longitudinal feed drive shaft 63 and the outer operation arm 64 are exposed greatly, and there is a risk of causing damage due to contact with these other objects. is there.
Therefore, in the present embodiment, the one-way clutch 66 for vertically feeding the seedlings is arranged below the third partition wall 22b from the left and right ends of the seedling stage 22, and thereby the seedling stage Even when 22 reaches the end of one of the left and right movement strokes, it is possible to avoid the other seedling vertical feed drive shaft 63 and the outer operation arm 64 from being exposed. It is possible to avoid damage caused by contact with the battery.
[0034]
As shown in FIG. 3, among the five planting transmission cases 20, the two planting transmission cases 20 on the left side are extended rearward from the left support frame 18, and the three planting transmission cases 20 on the right side are Extending rearward from the right support frame 18. The float fulcrum shaft 24 is configured to be divided into two parts: a left fulcrum shaft portion 24A that supports the left two leveling floats 23 and a right fulcrum shaft portion 24B that supports the right two leveling floats 23.
[0035]
As shown in FIGS. 2 and 4, of the two leveling floats 23, the left two leveling floats 23 supported by the left fulcrum shaft part 24 </ b> A have their left fulcrum shaft parts 24 </ b> A linked to the planting depth adjustment lever 27. Therefore, in the state where the seedling planting device 2 is switched to the retracted posture, the height position set in advance is maintained by the engagement between the planting depth adjusting lever 27 and the guide plate 28. ing. On the other hand, the two right leveling floats 23 supported by the right fulcrum shaft portion 24B not linked to the planting depth adjustment lever 27 are provided with a stopper 24c attached to the right fulcrum shaft portion 24B as shown in FIG. The contact with the planting transmission case 20 belonging to the right seedling planting part 2B is maintained at the lowest position where the shallowest state of planting depth adjustment appears.
[0036]
As shown in FIG. 4 and FIG. 17, the float fulcrum shaft 24 includes two of a left fulcrum shaft portion 24 </ b> A and a right fulcrum shaft portion 24 </ b> B of the float fulcrum shaft 24 associated with the posture switching to the retracted posture of the seedling planting device 2. The right and left connecting tool that allows division and connects the left and right fulcrum shaft portions 24A and 24B to a state in which the left and right fulcrum shaft portions 24A and 24B can be integrally rotated around the axis P6 in accordance with the posture switching to the working posture. 24a and 24b are provided. The left connector 24a equipped on the left fulcrum shaft portion 24A has an engagement space having a channel cross-sectional shape, and is provided with an outwardly-opening inclined guide plate that guides the engagement space. The right connector 24b equipped on the right fulcrum shaft portion 24B is formed by an engaging round bar formed in a loop shape that is inserted into and engaged with the engagement space of the left connector 24a.
[0037]
As shown in FIG. 15, in the state where the seedling planting device 2 is divided into the retracted state, the linkage between the right fulcrum shaft portion 24B and the planting depth adjustment lever 27 is released, and the right fulcrum shaft portion 24B is planted. The shallowest state of depth adjustment is switched to a state where it appears, and this state is maintained by the stopper 24c. On the other hand, when the planting depth adjustment lever 27 is operated to the operation position that reveals the shallowest state of planting depth adjustment, the phases of the left and right couplers 24a and 24b coincide with each other. Then, as the seedling planting device 2 is switched to the working position, the engagement round bar is inserted into the engagement space to be engaged and connected, and detached when the storage position is switched to the retracted position. It will be.
[0038]
As shown in FIGS. 3 and 4, among the four leveling floats 23, the two leveling floats 23 arranged on the left and right center sides of the seedling planting device 2 are wide so as to perform leveling for three strips. The first leveling float 23A formed in a substantially square shape is adopted, and the two leveling floats 23 arranged on the left and right ends of the seedling planting device 2 are arranged so as to perform leveling for two strips. A second leveling float 23B formed in a letter shape is employed.
As a result, the left and right front wheels 9 and the rear wheel 10 are traced over the four lines of seedlings, and the auxiliary wheel 10A is traced over the two lines of seedlings. Since the ground can be leveled, it is possible to effectively prevent the occurrence of seedling collapse and disturbance of the planting posture caused by the wheel marks formed by the wheels 9, 10, 10A.
[0039]
By arranging the second leveling float 23B for two leveling with less mud pushing than the first leveling float 23A for three leveling on the left and right ends of the seedling planting device 2, the left and right sides of the seedling planting device 2 are arranged. Compared to the case where the first leveling float 23A for three-level leveling is arranged on both ends, the influence of mud pushed out laterally by the leveling float 23 on the left and right ends on the existing seedlings should be reduced. Therefore, it is possible to effectively prevent the fall of the existing seedlings and disturbance of the planting posture caused by the mud pushing of the leveling float 23.
[0040]
As shown in FIGS. 17 to 19, each of the left and right second leveling floats 23 </ b> B has a ground contact pressure with a vertical swing angle around the horizontal axis P <b> 7 of the second leveling float 23 </ b> B that varies with traveling during planting operation. A float sensor (an example of a lift detection means) 39 comprising a rotary potentiometer, etc., which detects as a sensor float S and a sensor float S which detects a change in ground pressure by the second leveling float 23B and the float sensor 39 linked thereto. Is configured. Each sensor float S outputs the detected value to a control device 40 including a microprocessor mounted on the traveling machine body 1. Here, the second leveling float 23B is referred to as a ground sensor.
[0041]
As shown in FIG. 33, the control device 40 operates the electromagnetic control valve 41 that switches the flow state of the hydraulic oil with respect to the hydraulic cylinder 3 based on the average value of the ground pressure from the left and right sensor floats S. Automatic lift control means 40A for controlling the raising and lowering of the seedling planting device 2 so that the average value is within the dead zone width of the preset target value, and a link mechanism based on the difference in ground pressure from the left and right sensor floats S As a control program, a rolling control means 40B for controlling the rolling of the seedling planting device 2 so that the difference in the contact pressure falls within a predetermined range by operating the rolling motor 42 mounted on the vertical link 4C of No. 4 as a control program. With these control operations, seedlings can be stably planted at a desired planting depth regardless of changes in the field mud surface roughness. That.
In addition, since the second leveling float 23B that is not affected by the wheel marks is configured in the sensor float S, the raising / lowering control and the rolling control of the seedling planting device 2 based on the ground contact pressure can be performed with high accuracy. Therefore, seedlings can be planted at a desired planting depth with higher accuracy.
[0042]
Next, the detection structure of the left and right second leveling float 23B will be described in detail. As shown in FIGS. 17 to 19, a vertically long gate-shaped frame 32 is erected at the front end portion of the second leveling float 23 </ b> B, and faces forward from the front surface of the support frame 18 while penetrating through the internal space of the gate-shaped frame 32. A bracket 33 is extended, and an arm 34 that can swing up and down is pivotally supported at the tip of the bracket 33.
[0043]
On the other hand, a float sensor 39 is attached to a rearward inclined surface 35A of the standing frame 35 standing from the support frame 18 via a bracket 36, and the float sensor 39 is detected and operated on the back side of the bracket 36 to which the float sensor 39 is attached. A detection arm 37 is provided.
[0044]
As shown in FIGS. 17 to 19, the second leveling float 23 </ b> B and the detection arm 37 are spanned with a detection release wire 38, an outer receiver 35 </ b> B is provided above the bracket 36 for the float sensor S, and a gate shape is provided. The ceiling portion of the frame 32 is also used as the outer receiver 32A, the inner wire 38B is inserted into the outer wire 38A that spans the outer receivers 35B, 32A, and both ends of the inner wire 38B extending from the outer receivers 32A, 35A are inserted. Each is connected to one end of a detection arm 37 and a balance swinging arm 34.
Furthermore, the interlocking arm 70 extends from the float fulcrum shaft 24 that rotates integrally with the planting depth adjusting lever 27 toward the portal frame 32, and the interlocking arm 70 and the tip of the balance swinging arm 34 are connected to each other. It is connected by a rod 71.
[0045]
In the structure as described above, in the state where the planting depth adjustment lever 27 is fixed, the movement of the balance swinging arm 34 is fixed. Therefore, the vertical frame 32 is moved up and down by the vertical movement of the second leveling float 23B. The outer end of the detection release wire 38 moves up and down. On the other hand, since the balance swing arm 34 is in a fixed state, the distance L1 between the balance swing arm 34 and the top of the portal frame 32 to which the outer end is attached varies. As this change occurs, the distance L2 between the detection arm 37 for the float sensor and the outer end above it also needs to change, so that the detection arm 37 swings as a result of the change.
When the second leveling float 23B swings upward and the interval L1 increases, the detection arm 37 swings to reduce the interval L2. Conversely, when the second leveling float 23B swings downward and the interval L1 decreases, the detection arm 37 swings so as to increase the interval L2.
[0046]
Next, the case where the planting depth is adjusted will be described. When the planting depth adjustment lever 27 is operated, the support arm 25 swings and the second leveling float 23 moves up and down to change the relative height position with respect to the planting transmission case 20. In conjunction with this adjustment operation, the interlocking arm 70 simultaneously swings, and the swinging arm 70 swings the balance swinging arm 34 through the rod 71 around the intermediate fulcrum with respect to the bracket 33 extended from the support frame 18. Swing. As a result, the distance L1 between the top of the portal frame 32 that is integrally moved up and down as the second leveling float 23 is moved up and down and the inner wire 38B attachment end of the balance swinging arm 34 can be maintained constant. By making this interval L1 constant, it is possible to switch the planting depth without changing the reference value of the second leveling float 23.
[0047]
As shown in FIGS. 1 and 33, the raising / lowering control of the seedling planting device 2 by the automatic lifting control means 40A and the rolling control of the seedling planting device 2 by the rolling control means 40B are arranged on the right side of the driver seat 14. This is possible when the planting clutch lever 43 is set to the “automatic” position. In addition, setting of the target value when the raising / lowering control of the seedling planting device 2 by the automatic raising / lowering control means 40A is performed can be performed by manual operation of the setting device 44 composed of a rotary potentiometer equipped in the traveling machine body 1. It has become.
[0048]
The planting clutch lever 43 is equipped with a lever sensor 43A composed of a rotary potentiometer that detects the operation position and outputs the detected value to the control device 40. The control device 40 is based on the detected value. Manual control means 40C for controlling the raising and lowering of the seedling planting device 2 and the operation of the planting clutch 45 built in the gear type transmission 8 is provided as a control program.
[0049]
When the planting clutch lever 43 is operated to the “up” position, the seedling planting device 2 is raised, and when the planting clutch lever 43 is operated to the “down” position, the manual control means 40C is lowered. The operation state of the electromagnetic control valve 41 is switched so that the raising and lowering of the seedling planting device 2 is stopped when the planting clutch lever 43 is operated to the planting “on” position. When the planting device 2 performs the planting operation and is operated to the planting “cut” position, the operation state of the clutch motor 46 that intermittently operates the planting clutch 45 is switched so that the seedling planting device 2 stops the planting operation. It is configured.
[0050]
When the planting clutch lever 43 is set to the “automatic” position, the manual control means 40 </ b> C detects the operation of the neutral return type forced elevating operation lever 47 provided at the lower right of the steering wheel 11. Based on detection signals from the first switch 48 and the second switch 49, the operation states of the electromagnetic control valve 41 and the clutch motor 46 are switched.
[0051]
A state where the seedling planting device 2 is located at an elevated position deviating from the planting height position where the average value of the contact pressure from the left and right sensor floats S is within the dead zone width of the target value set by the setting device 44 When the ON signal is output from the first switch 48 by the downward swinging operation of the operation lever 47, the operating state of the electromagnetic control valve 41 is switched so that the seedling planting device 2 is lowered to the planting height position. .
[0052]
When the ON signal is output from the second switch 49 by the swinging operation of the operation lever 47 in a state where the seedling planting device 2 is located at the planting height position, the seedling planting device 2 is preset. The operation state of the electromagnetic control valve 41 is switched so as to rise to the upper limit position, and is turned on from the first switch 48 by a swinging operation of the operation lever 47 in a state where the seedling planting device 2 is located at the planting height position. When the signal is output, the operation state of the clutch motor 46 is switched so that the seedling planting device 2 performs the planting operation.
When an ON signal is output from the second switch 49 by the upward swing operation of the operation lever 47 in a state where the seedling planting device 2 is performing the planting operation, the seedling planting device 2 stops the planting operation. Thus, the operating states of the clutch motor 46 and the electromagnetic control valve 41 are switched so as to rise to the upper limit position.
[0053]
Then, as the seedling planting device 2 reaches the planting height position by the control operation of the manual control unit 40C based on the ON signal from the first switch 48, the automatic lifting control unit 40A of the seedling planting device 2 The raising / lowering control and the rolling control of the seedling planting device 2 by the rolling control means 40B are executed, and based on the ON signal from the second switch 49, the raising / lowering control and rolling control of the seedling planting device 2 by the automatic raising / lowering control means 40A. The rolling control of the seedling planting device 2 by the means 40B is stopped.
[0054]
As shown in FIGS. 5 and 33, among the partition walls 22b that divide the upper surface of the seedling mounting table 22 into ten seedling mounting surfaces 22a, each partition wall 22b in the section is provided with a seedling mounting surface 22a. A seedling remaining amount sensor 50 for detecting a decrease from a predetermined amount of the seedlings placed on is mounted.
Based on the ON signal from each seedling remaining amount sensor 50, the control device 40 activates an alarm device 52 including a buzzer, a lamp, a liquid crystal panel, and a voice generator provided in the boarding operation unit 15. It is configured to allow the driver to recognize that the number of seedlings placed on the seedling placement surface 22a has decreased from a predetermined amount.
[0055]
As shown in FIGS. 3 and 10, in a state where the seedling planting device 2 is switched to the working posture, the feed case 19 is disposed so as to be positioned substantially at the center of the left and right of the seedling planting device 2.
That is, in a state where the seedling planting device 2 is switched to the working posture, the feed case 19 installed in the right seedling planting portion 2B on the heavy side is positioned on the left and right center side of the seedling planting device 2. Is set so that the weight of the right seedling planting part 2B is easily applied to the left seedling planting part 2A. As a result, the seedling planting device 2 is used to plant seedlings for four strips. The left seedling planting device 2 and the right seedling planting unit 2B capable of planting 6 seedlings can be divided into two evenly, so that the seedling planting device 2 can be equally divided into the left and right 2 It is possible to effectively improve the left-right balance of the seedling planting device 2 in a work posture that is not balanced by simply arranging the left and right feed cases 19 from the center of the machine body to the left and right as in the case of being configured to be splittable. It is like that.
[0056]
The lock structure at the time of division | segmentation and the connection of the seedling planting apparatus 2 is demonstrated.
As shown in FIG. 8, the seedling planting device 2 is divided into a left seedling planting unit 2A capable of planting four seedlings and a right seedling planting unit 2B capable of planting six seedlings. It is configured to be splittable.
When the seedling planting device 2 is divided into left and right parts and then switched to a working posture in which the left and right seedling planting parts 2A and 2B are connected in a forward-facing posture in which the seedlings can be planted, the two seedling mounting parts 22A and 22B are connected. The locking mechanism to be described will be described. As shown in FIGS. 21 to 23, an upper lock tool 72 and a lower lock tool 73 are provided at the mating surface portions of the left and right seedling mounting parts 22 </ b> A and 22 </ b> B, and both the lock tools 72 are operated with an operation tool described later. It is.
[0057]
The structure of the upper lock 72 will be described. As shown in FIG. 21, a plate-shaped locking tool 72A that can swing up and down around a lateral axis P12 orthogonal to the seedling mounting surface is provided on the back surface of the right seedling mounting table portion 22B, and the adjacent left seedling mounting table A locking receiver 72B is provided on the portion 22A to hold the plate-shaped locking tool 72A between the front and rear sides. The locking receiver 72B includes a pair of front and rear sandwiching plates and an engagement pin 72C that penetrates and supports the sandwiching plates and penetrates into the engagement recess 72b of the plate-like locking tool 72A and maintains the engaged state. ing.
[0058]
The lower lock tool 73 that is located below the upper lock tool 72 and is formed on the surface of the seedling stage 22B will be described. The lower lock member 73 is formed by connecting two lock members 73A and 73B so that they can be bent. The two lock members 73A and 73B have a channel-shaped cross section set downward. On the other hand, when the seedling mounting parts 22A and 22B are combined in the action posture, the wall parts 22c and 22d at one end are positioned adjacent to each other. Here, by engaging the two locking members 73A and 73B with the two wall portions 22c and 22d, the seedling mounting portions 22A and 22B can be operated without separating the both wall portions 22c and 22d. Maintain posture.
[0059]
The first lock member 73A located on the upper side of the first and second lock members 73A and 73B constituting the lower lock tool 73 is provided with a large handle portion 73D as a single operation tool, and the handle portion 73D. The two first and second lock members 73A, 73B are lifted in a mountain shape in a bent state. When the handle portion 73D is pushed down from the lifted state, the two first and second lock members 73A, 73B are extended and locked on the side wall portions 22c, 22d. A plate-like operation linking tool (an example of a linking mechanism) 74 is linked to the upper end of the first lock member 73A, and the operation linking tool 74 is swingable on one side end of the right seedling mounting part 22B. To support. The portion of the right seedling stage 22B where the operation linking tool 74 is provided forms a slight notch, and the operation linking tool 74 is fitted and positioned in the notch, and the left and right seedling mounting parts 22A, 22B. In the action posture in which the two are adjacent to each other, the operation linking tool 74 protruding from the seedling mounting surface side to the back surface does not get in the way. The upper end of the first lock member 73A is connected to a portion protruding from the right seedling mounting portion 22B of the operation linkage 74 so as to be able to bend and swing so that it can be operated by the handle portion 73D.
[0060]
In the plate-like locking tool 72A, an engagement hole 72a is provided at a position corresponding to the tip of the operation link 74, and the tip of the operation link 74 is passed through the engagement hole 72a. When the operation coupling tool 74 is swung to lift the plate-shaped locking tool 72A, the plate-shaped locking tool 72A is swung to be separated from the lock receiving tool 72B, and the locked state is released. When the operation linking tool 74 is further lowered, the plate-like locking tool 72A enters into both the sandwiching plates of the locking receiving tool 72B, and the locked state appears.
As described above, on the seedling mounting surface side at the lower end portion of the seedling mounting table 22, the lower locking device 73 that is sandwiched and connected to both side wall ends 22 c and 22 d and above the lower locking device 73 and the back surface of the seedling mounting surface Since the upper locking device 72 provided on the side is interlocked and connected by an operation linking device 74, a single handle portion 73 </ b> D is provided on the second locking member 73 </ b> B as an operating device for operating both the locking devices 72 and 73. It is only necessary to provide it.
[0061]
The action posture locking mechanism 75 that maintains the state where the seedling planting device 2 is set to the action posture will be described. As shown in FIGS. 28 to 31, a gate-shaped cross-section lock is provided on the front surface of the connecting frame 16 that is capable of rolling operation via the rolling shaft 16 </ b> A toward the traveling machine body 1 so as to be swingable up and down. The locking tool 76 is pivotally supported and extended rearwardly until the rear end portion of the locking locking tool 76 is positioned on the side of the support frames 18, 18 located behind the connection frame 16. is there. An engagement piece 76a that engages with an engaged large-diameter pin (an example of an engaged portion engaging portion) 18A, which will be described later, is formed at the rear end portion of the lock locking member 76.
[0062]
On the other hand, the large-diameter pins 16C and 16C protrude short on both lateral end faces of the connecting frame 16, and further, lateral lock pieces 77 that swing back and forth are provided outside the large-diameter pin 16C. The lock stopper 76 and the lateral lock pieces 77 are connected by linkage mechanisms 78, 78, and are configured to swing together.
The linkage mechanisms 78 and 78 have the following configuration. As shown in FIG. 30, the lock locking device 76 is formed so as to swing in a balance-type manner, and the front side is opposite to the rear end portion where the engagement recess 76a is formed across the swing shaft core. One part is extended. A relay arm 78B is pivotally supported below the lock latch 76 so as to swing up and down around the horizontal axis. The relay arm 78B and the front piece 76b of the lock latch 76 are linked to each other. Linked by a link 78A, the front piece portion 76b of the lock latching tool, the link link 78A, and the relay arm 78B constitute a four-link mechanism that can be interlocked. A rotating shaft 78C to which the relay arm 78B is attached extends to the left and right along the front surface of the connecting frame 16, and a lateral lock piece 77 is attached to the left and right extending ends so as to be integrally rotatable.
Here, the four-link mechanism and the rotating shaft 78 </ b> C are referred to as a linkage mechanism 78 that links the lock latch 76 and the lateral lock pieces 77, 77.
[0063]
An operation rod 76A provided with a grip for operation is erected on the upper surface of the lock retainer 76. When the operation rod 76A is pushed backward by gripping the grip, the lock retainer 76 and both The lateral lock pieces 77 and 77 are integrally swung and engaged with a counterpart member described later, so that the locked state appears.
[0064]
Next, the mating member that engages with the lock stopper 76 and the lateral lock pieces 77 and 77 will be described. As shown in FIGS. 28, 30, and 31, the engaged large-diameter pins 18A and 18A that protrude from the opposite side surfaces of the left and right support frames 18 and 18 toward the opposite side surfaces are provided upright and locked. The engaging piece 76a is configured to be engaged with the engaging piece 76a. On the other hand, a bracket 18B having an engagement hole (an example of an intermediate portion engagement portion) 18b that opens forward on the front surface of the left and right support frames 18, 18 toward the connection frame 16, and toward the laterally outward side from the bracket 18B. Protruding engaged small-diameter pins 18a, 18a are provided.
[0065]
As shown in FIG. 31, when the lock engaging member 76 is swung backward by the operating rod 76A, the engaging piece 76a of the lock engaging member 76 is engaged with the engaged pin 18A of the support frame 18. When the lateral lock piece 77 is actuated, the large diameter pin 16C provided on the connecting frame 16 is engaged with the engagement hole 18b of the bracket 18B, and at the same time, the lateral lock piece 77 is engaged with the engaged small diameter pin 18a. The lock state is displayed.
As described above, the action posture locking mechanism 75 is configured, and by simply operating the operation rod 76A by grasping the grip portion, the opposite side surface portions of the left and right support frames 18, 18 and the left and right support frames 18 are arranged. , 18 can be operated at two lock sites.
[0066]
As shown in FIG. 28, a circular protective frame 79 is disposed so as to surround the planting transmission case 20 so as to face the both end surfaces of the left and right support frames 18, 18, and is supported from the main body of the protective frame 79. 79b is lowered and connected and fixed to each planting transmission case 20, and the support frame 79 is supported by the support bracket 79b to protect the planting mechanism 21 and the like. Since the protection frame 79 needs to be divided when the seedling planting device 2 is switched between the operating posture and the retracted posture, a connection separation mechanism 80 is provided at an intermediate position. As shown in FIG. 26, the connection separating mechanism 80 is provided with a bracket 81a in the vicinity of the connection portion of the right protective frame portion 79B belonging to the right support frame 18, and the bracket 81a can swing left and right around the front and rear axis. A connection handle 81A is attached. A dead point spring 81B is stretched on the connection handle 81A to bias the connection handle 81A to the operation position. The connection handle 81A is attached with a hook locking member 81C that swings integrally, and a locking portion 81b is bent at the tip of the hook locking member 81C.
[0067]
On the other hand, an engagement piece 79a is formed at the connection portion of the left protection frame portion 79A, and is configured to be freely disengaged from the engaging portion 81b of the hook engaging member 81C. A rubber cushion member 82 that can be elastically deformed is attached and fixed to the engaged piece 79a in order to strengthen the connected state.
[0068]
An operation structure for the clutch mechanism 29 provided on the left drive shaft 63 in the longitudinal feed drive shaft 63 will be described. As shown in FIGS. 24 and 25, the meshing clutch mechanism 29 is fixedly engaged with the sliding engagement claw 29A urged in the engaged state and the drive shaft 63A so as not to slide. Although the point constituted by the claw 29B has already been described, a clutch fork 29C for switching the left and right of the sliding type engaging claw 29A is provided, and the clutch fork 29C is engaged in the engagement direction. The slide-type engaging claws 29A biased by are driven in a direction to separate them. A clutch fork 29C that rotates about a longitudinal axis is linked to a hook 81C for connecting the protective frame 79 via a release wire 83, and the clutch fork 29C is operated by operating the connection handle 81A. The connection handle 81 </ b> A is also used as an operation tool for the clutch mechanism 29 so that the operation can be performed.
[0069]
That is, as shown in FIGS. 24 (B) and 26 (B), when the connection handle 81A is tilted to the left and the hooking and locking tool 81C is removed, the release wire 83 is pulled and the clutch fork 29C is driven to swing. As a result, the sliding type engaging claws 29A are separated from the fixed side engaging claws 29B. In this state, as shown in FIGS. 24 (a) and 26 (a), in the state in which the protective handle 79 is connected by operating the connection handle 81A to engage the hook locking member 81C with the engaged piece 79a. The clutch fork 29C swings away from the sliding engagement claw 29A, and the sliding engagement claw 29A moves in a direction to engage with the fixed engagement claw 29B by the urging force.
[0070]
Next, a storage posture locking mechanism that locks the seedling planting device 2 in a state in which the seedling planting device 2 is switched to the storage posture and an operation mechanism 84 that releases the lock will be described. As shown in FIGS. 28, 29 and 32, the left support frame 18 and the right support frame 18 are provided with locking locks 84A and 84A swinging in a balance-type manner on the left end and the right support frame 18, respectively. A lock release lever 84B is provided on the protective frame 79 behind the tool 84A, and the lock release lever 84B and the locking lock tool 84A are connected by an interlocking rod 84C. The locking device 84A is urged in the engaging direction by a spring.
[0071]
On the other hand, as shown in FIG. 28, an engagement rod (an example of an engaged portion) 16b is provided on the rear surface of the connection frame 16 so as to protrude from the left and right, and the locked state is determined by engaging with the locking lock tool 84A. The storage posture lock mechanism is configured.
That is, as shown in FIG. 29, the left end of the support frame 18 that switches to the front-back orientation in the state in which the seedling planting device 2 is switched to the retracted position is positioned forward, and the attitude of the locking lock 84A is the connection frame 16. The locking device 84A automatically engages with the engagement rod 16b. Thus, the locked state in the retracted position appears by the engagement locking tool 84A automatically engaging.
When the unlocking lever (an example of the unlocking operation tool) 84B is operated from the locked state, the locking lock tool 84A is released and the locked state is released.
[0072]
The operations that can be switched between the action posture and the retracted posture by operating the lock mechanism as described above are summarized as follows.
First, in the case of switching from the action posture to the retracted posture, the lateral feed drive mechanism 57 is driven from the state shown in FIG. 7 to bring the seedling stage 22 to one of the left and right sides (this approached state is not shown). ). The lock state of each lock mechanism is released in the state where it is moved to one side.
A. The connection handle 81A is operated to release the connection separating mechanism 80 and the clutch mechanism 29 of the longitudinal feed drive shaft 63.
B. Next, the handle portion 73D is pulled up to release the sandwiched state of the two lock members 73A, 73B of the lower lock tool 73, and the plate-like locking tool 72A of the upper lock tool 72 is moved by the operation linkage tool 74. The seedling stage 2 can be separated by lifting and releasing the engagement with the locking tool 72B. Further, the operation rod 76A is operated from the driving operation unit side to release the lock state of the lock engaging member 76 and the lateral lock piece 77, and the linkage between the connection frame 16 and the support frame 18 is released.
C. The locked state is released by the above operation, and the linked state of the left and right seedling planting parts 2A, 2B is released. Here, the right and left seedling planting parts 2A and the like are artificially pulled to separate the left and right seedling planting parts 2A and 2B (this state is not shown).
D. When separated, next, one of the right and left seedling planting parts 2A is artificially pulled to swing toward the retracted position. Then, as shown in FIG. 8, the swing frame 17 swings backward about the connecting shaft center with the connection frame 16 to switch to the front-rear orientation, and the support frame 18 is connected to the swing frame 17. It swings in the opposite direction to the swing frame 17 around the connection point, and assumes a posture in the front-rear direction parallel to the swing frame 17. This state is the retracted posture shown in FIG.
E. When in the retracted position, the locking lock 84A of the operation mechanism 84 engages with the engagement rod 16b of the connecting frame 16, and the locked state appears automatically.
What. When returning from the retracted posture to the action posture, the lock in the retracted state can be released by operating the lock release levers 84B and 84B provided in the left and right seedling planting parts 2A and 2B. And it can switch to an action posture by grasping each seedling planting part 2A and 2B and artificially returning to the original action posture.
[0073]
[Another embodiment]
Hereinafter, other embodiments of the present invention will be listed.
{Circle around (1)} The left seedling planting part 2 </ b> A may be a target for providing the feed case 19.
(2) The seedling planting device 2 can be divided into two parts, a left seedling planting part 2A capable of planting six seedlings and a right seedling planting part 2B capable of planting four seedlings. Alternatively, the left and right seedling planting parts 2A and 2B that can plant seedlings for five strips may be configured to be equally divided into two.
[Brief description of the drawings]
[Fig. 1] Whole side view of rice transplanter
[Fig. 2] Side view of seedling planting device
[Fig. 3] Plan view of seedling planting device
FIG. 4 is a plan view of a seedling planting device showing the arrangement of a leveling float.
FIG. 5 is a plan view of a seedling stand showing an arrangement of a remaining seedling sensor.
FIG. 6 is a schematic cross-sectional view of a seedling stand showing the arrangement of the one-way clutch and each of the strip clutches.
FIG. 7 is a schematic plan view of a rice transplanter showing an action posture before changing the posture of the seedling planting device.
FIG. 8 is a schematic plan view of a rice transplanter showing a state in the middle of posture switching of the seedling planting device.
FIG. 9 is a schematic plan view of a rice transplanter showing a state in which the seedling planting device is switched to the retracted position.
FIG. 10 is a plan view showing a transmission configuration of the seedling planting apparatus.
FIG. 11 is a cross-sectional view of the main part showing the transmission structure of the feed case
FIG. 12 is a cross-sectional plan view of the main part showing a state in the middle of posture switching of the seedling planting device.
FIG. 13 is a cross-sectional plan view of the seedling planting device switched to the retracted position.
FIG. 14 is a cross-sectional plan view of the main part showing the transmission configuration to the planting mechanism.
FIG. 15 is a longitudinal side view of the main part showing the action of the stopper.
FIG. 16 is a plan view showing a mounting state of an impact absorbing member provided on the chain.
FIG. 17 is a rear view showing a posture switching mechanism of the seedling planting device.
FIG. 18 is a side view showing a detection structure of a ground sensor.
FIG. 19 is a rear view showing the detection structure of the ground sensor.
FIG. 20 is a side view showing the upper and lower locking device.
FIG. 21 is a front view showing a state before the upper and lower locking devices are locked.
FIG. 22 is a front view showing the locked state of the upper and lower locking devices.
FIG. 23 is a rear view showing the upper and lower locking devices.
FIG. 24 is an operational plan view showing a state in which the clutch mechanism of the longitudinal drive shaft and the connection / separation mechanism of the protective frame are linked.
25 is a side view corresponding to FIG. 24. FIG.
FIG. 26 is a rear view showing the connection separation mechanism of the protective frame.
FIG. 27 is a plan view corresponding to FIG.
FIG. 28 is a plan view showing a protective frame and various locking mechanisms.
FIG. 29 is a plan view showing a state where the storage posture is switched from FIG. 28;
FIG. 30 is a side view showing an action posture lock mechanism.
FIG. 31 is a side view showing a state where the locking action piece is actuated from FIG. 30;
FIG. 32 is a side view showing a retracted posture locking mechanism.
FIG. 33 is a block diagram showing a control configuration.
[Explanation of symbols]
2 Seedling planting equipment
2A left seedling planting part
2B Right seedling planting part
19 Feed case
21 Planting mechanism
22A Left seedling stage
22B Right seedling stage
55 Vertical feed drive mechanism
57 Transverse drive mechanism
63 Vertical feed drive shaft

Claims (3)

The seedling planting device is divided into two at the intermediate position in the left-right width direction to form the left and right seedling planting parts, and the action posture to align the left and right seedling planting parts in the left and right directions and each seedling planting part to the front-back orientation A vertical feed drive mechanism that is configured to be switchable between the storage posture to be set and feeds the seedlings placed on the seedling mounting base part toward the seedling outlet in the planting mechanism for each right and left seedling planting part. It is a rice transplanter equipped,
While providing a feed case for receiving power transmission from the driving part on one of the left and right seedling planting parts,
The vertical feed drive shaft of the vertical feed drive mechanism is extended from the feed case to the other seedling planting portion, and the one seedling planting portion is a part corresponding to a two-divided position of the seedling planting device. The vertical feed drive shaft belonging to and the vertical feed drive shaft belonging to the other seedling planting part are configured to be intermittent via a clutch mechanism,
A rice transplanter configured to transmit power to a planting mechanism belonging to the other seedling planting unit from a longitudinal feed drive shaft belonging to the other seedling planting unit. The number of planting mechanisms belonging to each seedling planting unit is set to a different number, and a feed case is provided in the seedling planting unit with the larger number of planting mechanisms installed, and the seedling platform is reciprocated with a constant stroke. The rice transplanter according to claim 1, further comprising a transverse feed driving mechanism. One of seedling planting unit longitudinal feeding drive shaft and the other seedlings longitudinal belonging to the planting unit feed drive shaft and the possible intermittent clutch mechanism belonging to the so that both longitudinal feeding drive shaft are joined at a constant rotational phase The rice transplanter according to claim 1, which is configured.

Images