JP2012050342A - Seedling transplanter - Google Patents

Abstract

[PROBLEMS] To provide a seedling transplanting machine equipped with a heel clutch automatic return device that can perform leveling properly in a headland or near a headland where the field is likely to be rough, and has improved seedling planting accuracy.
An electric mechanism is provided for transmitting an upward movement of an upper link to a hook clutch by connecting an upper link for raising the planting portion of the vehicle body and the hook clutch lever with a cable or the like. With the ascending movement, the saddle clutch can be switched to the “on” state via the linkage mechanisms A and B. At the same time, the clutch cable 99 of the leveling rotor clutch 39 is connected to the linkage mechanisms A and B, and the leveling rotor can be switched “on” by raising the upper link 40.
[Selection] Figure 8

Description

  The present invention relates to a seedling transplanter equipped with a heel clutch automatic return device.

In a seedling transplanter with a float and a seedling transplanter (sometimes referred to as a rice transplanter) equipped with a rotor for leveling the field just before seedling planting by the seedling planting device, depending on the vehicle speed There is known a technique that has a configuration in which a float is raised, or a configuration that can increase the leveling action and the planting effect in rough farmland as well as in the vehicle speed according to the roughness of the field.
In this specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

JP 2009-118778 A

  When the seedling transplanting machine disclosed in Patent Document 1 is turned at the end of the field, even if the seedling transplanting device is raised or lowered, the heel clutch operating lever does not move, and the heel clutch is in the “on” state or “off” state. Therefore, forgetting to operate the heel clutch at the start of planting work after turning, the plant will not be planted on the line that requires planting of seedlings, and it is necessary for the operator to plant seedlings manually later. Yes, the labor of workers increased.

  Further, in the seedling transplanting machine disclosed in the above-mentioned Patent Document 1, the number of steps of the turning operation increases, and there is a problem that a part where the operation of the heel clutch cannot catch up and the seedling is not planted occurs, In order to perform the operation accurately, there is a problem that traveling is stopped in the middle of the turn and the work efficiency is lowered.

  An object of the present invention is to prevent the occurrence of a field scene in which seedlings are not planted when turning at the field edge of the traveling vehicle body, and by leveling the rough field edge, the number of steps of the turning operation of the operator It is to provide a seedling transplanting machine that can reduce the work efficiency and increase the work efficiency.

The above-mentioned problem of the present invention is solved by the following means.
The invention according to claim 1 includes a traveling vehicle body (2) having a pair of front and rear wheels (10, 11), a steering device (34) for turning the traveling vehicle body (2), and the traveling vehicle body (2). A seedling mounting stage (51) for loading seedlings to be planted in the field at the rear, and a planting device provided with a plurality of seedling planting tools (52a) for taking seedlings from the seedling mounting stage (51) and planting them in the field (52) a seedling planting part (4), a lifting link device (3) for raising and lowering the seedling planting part (4), and transmission of driving force to the seedling planting part (4) And a plurality of hook clutches for turning on and off the transmission of the driving force of each of the planting devices (52) corresponding to a particular planting line of the plurality of lines, and a plurality of each operating the plurality of hook clutches畦 It is movable up and down with respect to the clutch operating lever (19) and the seedling planting part (4) and in the lateral width direction of the traveling vehicle body (2). In a seedling transplanting machine provided with a leveling device (27a, 27b) that is arranged and grounded to level the ground, and a leveling device clutch (39) for turning on and off the driving force to the leveling device (27a, 27b) ,
The elevating link device (3) and the eaves clutch operating lever for switching all the eaves clutch operating levers (19) in conjunction with the raising and lowering of the seedling planting part (4) by the elevating link device (3) It is a seedling transplanting machine provided with the cooperation mechanism (A) containing the pulling member (48) which cooperates (19).

  In the invention according to claim 2, the leveling device clutch (39) is "cut off" in conjunction with the raising of the seedling planting part (4) by the lifting link device (3), and the lifting link device (3) Linking the elevating link device (3) and the leveling device clutch (39) to "turn on" the leveling device clutch (39) in conjunction with the lowering of the seedling planting part (4) by The seedling transplanter according to claim 1, further comprising a mechanism (B).

  According to a third aspect of the present invention, the traction member (48), which is a constituent member of the linkage mechanism (A), includes a first traction member (48a), a second traction member (48b), and a connecting member (112). One end of the first pulling member (48a) is connected to the base of the interlocking member (115) that rotates in conjunction with the raising / lowering of the seedling planting part (4) by the lifting / lowering link device (3). One end of the second traction member (48b) is linked to the saddle clutch operation lever (19) of the first and second ends of the first traction member (48a) and the other ends of the plurality of second traction members (48b). The seedling transplanter according to claim 1 or 2, wherein the seedling transplanter is connected to the member (112).

  According to a fourth aspect of the present invention, there is provided a lever operating arm (19) on a hub (19a) that rotates about a rotating shaft (22) provided on the traveling vehicle body (2) while supporting the saddle clutch operating lever (19). 110) is pivotably installed, a pin (107) is provided at one end of the lever operating arm (110), and the hub (19a) is rotated when the hub (19a) rotates in one direction. A contact arm (109) for pressing (107) is fixed, and a locking member (83) in which one end of the second pulling member (48b) is connected to the other end of the lever operating arm (110) is rotatably connected. The seedling transplanter according to claim 3, wherein the seedling transplanter is provided.

  According to the first aspect of the present invention, the heel clutch operating lever 19 moves in conjunction with the raising of the seedling planting portion 4 by the linkage mechanism A and is switched to “ON” of all the heel clutches (not shown). Therefore, at the end of the field, all seedling clutches are in the “ON” state, raising the seedling planting part 4 to turn the traveling vehicle body 2 and immediately lowering the seedling planting part 4 immediately after turning, Since planting is performed, it is possible to prevent the occurrence of a streak in which seedlings cannot be planted after turning of the traveling vehicle body 2, and it is not necessary for an operator to plant seedlings manually in the field where seedlings were not planted. Workers' labor is reduced and work efficiency is improved.

  In the embodiment shown in FIG. 8, the linkage mechanism A includes a cam 115 and a pulling member (automatic return cable) 48. In the embodiment shown in FIG. 10, the cam 115, the connecting member 112, and a pulling member (automatic return cable). 48a and 48b.

  At this time, the cable constituting the linkage mechanism A and described in the embodiment has different configurations in FIGS. 8 and 10, and will be referred to as “automatic return cable 48 (48a, 48b)” in this specification. .

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the hook clutch is switched to the “on” state by the linkage mechanism (A) in conjunction with the ascent of the lifting link device 3 and linked simultaneously. The leveling device clutch 39 is switched to the “off” state by the mechanism (B), and the leveling device clutch 39 is set to the “on” state in conjunction with the lowering of the lifting / lowering link device 3, and the lifting / lowering link device 3 is raised. By keeping the saddle clutch in the “ON” state in the “ON” state due to the above, it is possible to prevent forgetting the operation of the leveling device 27 during the headland leveling work. Rough headland is surely leveled.

  In the embodiment shown in FIGS. 6 and 13, the linkage mechanism B includes a cam 115, a clutch cable 99, and a clutch shifter 97.

  According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, a plurality of saddle clutch operation levers from the connecting member 112 connecting the first traction member 48b of the linkage mechanism A With the configuration in which the second pulling member 48a is branched and connected to the plurality of hook clutch operating levers 19 can be switched simultaneously by raising the lifting link 3, and all of the plurality of hook clutch levers 19 in the plurality of rice transplanters can be switched. Since the cooperation mechanism A can be applied to the operator, the labor of the worker is reduced and the work efficiency is improved.

  According to the fourth aspect of the present invention, in addition to the third aspect of the invention, the lever operating arm 110 is coupled to the saddle clutch operating lever 19, the pin 107 is provided at the end of the lever operating arm 110, and the saddle clutch operating lever 19 is provided. By providing the contact arm 109 on the hub 19a, when the seedling planting portion 4 is lowered by the “lever principle” and the interlocking member is rotated, the contact arm 109 is pushed when the pin 107 rotates in one direction, and the hook clutch The operation lever 19 can be automatically returned to the “ON” direction, reducing the labor of the operator and improving the work efficiency.

It is a side view of the riding type rice transplanter of the Example of this invention. It is a top view of the riding type rice transplanter of FIG. They are a top view (Drawing 3 (a)) and a perspective view (Drawing 3 (b)) of a seedling preliminary mounting stand carried in riding type rice transplanter shown in Drawing 1. It is a principal part side view of the seedling planting part of the riding type rice transplanter of FIG. It is a principal part rear view of the support structure of the seedling mounting stand of the riding type rice transplanter of FIG. It is a principal part top view of the seedling planting part of the riding type rice transplanter of FIG. It is a principal part rear view which shows the structure which installed the disk in the rotor vicinity of the riding type rice transplanter of FIG. It is a principal part side view of the cooperation mechanism from the saddle clutch operation lever of FIG. 1 to a planting part. It is the principal part disassembled perspective view which showed the structure of the saddle clutch lever from the automatic return cable of FIG. It is a conceptual diagram of the principal part side surface of a cooperation mechanism when the cooperation mechanism (A) of the saddle clutch of FIG. 8 is comprised for 6 row planting rice transplanters. The principal part side view (FIG. 11 (a)) which shows the structure of the principal part of the modification of the saddle clutch operation lever rotation fulcrum of the saddle clutch cooperation mechanism (A) of FIG. 8 and the lever operation arm of FIG. 11 (a) FIG. 11 is a perspective view (FIG. 11B) of main parts of 110 and a locking member 83. It is a side view of the principal part of the saddle clutch operation lever rotation fulcrum of the modification of the structure shown in FIG. It is a perspective view of the principal part of the structure which connected the leveling rotor clutch cable to the cam of the cooperation mechanism (A) of the saddle clutch of FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In this description, the front-rear direction and the left-right direction are defined with reference to the operator sitting at the steering seat 31 toward the handle 34 with the front in the traveling direction as the front.

  FIGS. 1 and 2 are a side view and a plan view of a riding type rice transplanter equipped with a fertilizer application device as a granular material feeding device which is an embodiment using the present invention. In this riding type rice transplanter 1 with a fertilizer application, a seedling planting portion 4 is mounted on the rear side of the traveling vehicle body 2 via an elevating link device 3 so that the seedling planting portion 4 can be moved up and down. Is provided.

  The traveling vehicle body 2 is a four-wheel drive vehicle including a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at a front portion of the traveling vehicle body. Front wheel final cases 13 and 13 are provided on the left and right sides of the transmission case 12, and the left and right front wheel axles projecting outward from the respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13 and 13 Front wheels 10 and 10 are respectively attached. Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel gear case 18, with a rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum. The rear wheels 11 and 11 are attached to a rear wheel axle 11a that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission device 21 and a hydrostatic continuously variable transmission (HST) 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and the fertilizer application device 5 by the fertilization cooperation mechanism 28. Is transmitted to.

The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.
3 (a) and 3 (b), there are spare seedling platforms 38 on which replenishing seedlings are provided on both the front left and right sides of the traveling vehicle body 2 so as to protrude outwardly from the traveling vehicle body. Show.

  In the present embodiment, a guide 80 that conveys a fertilizer bag (not shown) containing fertilizer is inclined to the left and right seedling slider struts 17 of the preliminary seedling stage 38 so that the front of the traveling vehicle body 2 can be lowered. In addition, by installing both ends of the guide 80 horizontally, an assistant who does not get on the rice transplanter can place a fertilizer bag (not shown) on the guide 80 from below the front of the traveling vehicle body 2. An operator (operator) of the traveling vehicle body 2 can receive the fertilizer bag 24 from above via 80.

  The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a gate-shaped link base frame 42 in a rear view in which the base side is erected at the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. Has been. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlet 51a of each row one by one. When all the seedlings are supplied to the seedling outlet 51a, the seedling feed belt 51b is used to transfer the seedlings downward by a seedling feeding belt 51b, and the seedling planting is carried out in the field. Attaching device 52,... Includes a pair of left and right drawing markers (not shown) for drawing the course of the traveling vehicle body in the next stroke to the topsoil surface. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the traveling vehicle body is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52 is placed on the leveling trace. ..., seedlings are planted. Each of the floats 55, 56, and 56 is pivotably attached so that the front end side is raised and lowered according to the unevenness of the soil surface of the field, and the vertical movement of the front part of the center float 55 is a reception angle sensor (see FIG. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guided to a guide (not shown),... Is dropped into a fertilization structure formed in the vicinity of the side portion of the seedling planting line by a grooved body 69 provided on the front side of the fertilization guide. Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported.

  A leveling device 27 (27a, 27b), which is an example of a leveling device, is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

The side view of FIG. 4 and the rear view of FIG. 5 show the main parts of the rotor support structure, and FIG. 6 shows the main part plan view of the rotors 27a and 27b, the floats 55 and 56, and the seedling planting device 52 part.
The rotor support structure includes a beam member 66 whose upper ends are rotatably supported on both side members 65b of the support frame 65 of the seedling stage 51, a support arm 67 fixed to both ends of the beam member 66, and the support. A rotor support frame 68 that is rotatably attached to the arm 67 is provided. A driving shaft 70 (70a, 70b) of the leveling device 27 (27a, 27b) is attached to the lower end of the rotor support frame 68. Further, the vicinity of the lower end of the rotor support frame 68 is connected to a seedling planting device connecting member 71 that is rotatably attached to the transmission case 50.

  FIG. 7 shows a disc-shaped disk 29 that penetrates the drive shaft 70a at a right angle so that the drive shaft 70a can rotate in the center in the left and right gaps of the plurality of leveling devices 27 (27a, 27b). Further, cylindrical hubs 29a are provided concentrically with the disk 29 on both sides of the disk 29, and the hub 29a is disposed in the left-right direction of the leveling device 27, and the drive shaft portion 70a of the leveling device 27 is connected to the drive shaft portion 70a. It is principal part partial sectional drawing of the Example which inserted the hub 27c inside the hub of the hub 29a in the leveling apparatus 27 installed coaxially.

  As described above, the disc 29 having the hub 29a is provided on the leveling rotors 27a and 27b, and the hub 27c of the leveling device 27 is further installed, so that foreign matter can be prevented from entering through the gap between the disc portion 29 and the leveling device 27. At the same time, it is possible to prevent the entanglement of impurities on the drive shaft 70a and the like.

  As shown in FIG. 6, the clutch shifter 97 of the rotor drive case 87 and the clutch cable 99 for operating the shifter 97 are arranged inside the rear wheel gear case 18 and at the center of the traveling vehicle body.

A rotor raising / lowering motor 63 is provided on the axial extension line of the beam member 66.
As shown in FIG. 6, the rotor (sometimes referred to as a center rotor) 27 b in front of the center float 55 in relation to the arrangement position with the floats 55 and 56 is referred to as a rotor (referred to as a side rotor) in front of the side float 56. It is located in front of 27a. Therefore, the power to the drive shaft portion 70a of the left rotor 27a is transmitted from the gear in the gear case 18 of the rear wheel 11 to the gear in the rotor drive case 87, and from the rotor drive case 87 through the universal joint 72 and the like. In the embodiment shown in FIG. 8, the linkage mechanism A in the chain case 73, in which the driving shaft portion 70b of the rotor 27b is transmitted and the power is transmitted from the end of the driving shaft portion 70a of the left rotor 27a on the vehicle body, 115 and the cable 48, and in the embodiment shown in FIG. 10, the cam 115, the connecting member 112, and the cables 48a and 48b. Power is transmitted from a chain (not shown). The drive shaft 70a of the right rotor 27a is transmitted with power from the drive shaft 70b of the rotor 27b via a right chain (not shown).

  Further, the rear wheel 11 has a large groove in the field after the rear wheel 11 passes, but the wheel shown in the plan view of the main part of the seedling planting part 4 in FIG. The large concave portion (groove) 11 could not be backfilled. Therefore, as shown in the rear view of the main part of the seedling planting part 4 showing the arrangement relationship between the rotors 27a and 27b and the rear wheels shown in FIG. 7, the diameter of the rotor 27a1 immediately after the rear wheel 11 is made larger than the conventional one. A large groove made by the ring 11 may be backfilled.

  Since the drive shaft portion 70b of the rotor 27b is only supported through a pair of left and right chain cases 73, 73, a reinforcing member 74 that bridges the pair of left and right chain cases 73, 73 to reinforce the chain cases 73, 73. Is provided.

The rotor 27b is suspended by a pair of link members 76 and 77 whose upper ends are supported by the beam member 66 via a spring 78.
The pair of link members 76 and 77 includes a first link member 76 whose one end is fixedly supported by the beam member 66 and a second link member 77 whose one end is rotatably connected to the other end of the first link 76. Thus, the spring 78 is connected between the other end of the second link member 77 and a mounting piece 74a rotatably supported by the reinforcing member 74.

  The beam member 66 is rotated in the direction in which the first link member 76 is rotated upward by the operation of the rotor lifting / lowering motor 63, and the first link member 76 and the second link member are rotated along with the rotation of the beam member 66. The rotor 27 b can be lifted upward via the spring 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft portion 70b and the drive shaft portion 70a.

  In this embodiment, the rotors 27a and 27b at the standard position at a height of about 40 mm from the farm scene can be raised by about 15 mm from the standard position by the rotation of the rotor lifting motor 63, and the rotor lifting motor 63 is in the opposite direction. It is set so that it can be lowered by about 15 mm from the standard position by turning.

  As shown in FIG. 5, since the rotors 27a and 27b can be moved up and down by the rotor lifting and lowering motor 63, the beam member is used when planting seedlings while leveling the edge with the rotors 27a and 27b. A configuration in which the rotor lifting motor 63 automatically switches the working state of the rotors 27a and 27b, in which the shaft 66 is rotatable, from the working state of the rotors 27a and 27b in conjunction with the raising of the seedling planting unit 4. It can be.

Since the rotor 27b is supported by the seedling planting part 4 via a spring 78 or the like so that the rotor 27b escapes from the lower links 41, 41 when the seedling planting part 4 is raised, the rotor 27a is flexible. Is supported by the seedling planting part 4.
Further, the rotors 27a and 27b may be adjusted to a set height by a rotor height adjustment dial provided on a meter panel (not shown) provided in the vicinity of the control seat 31.

  When the rotor height is set manually, the rotors 27a and 27b may not be used during the next seedling planting operation while the rotors 27a and 27b are moved to the storage position. If the configuration is adjusted to the set height, such a problem can be prevented.

  As shown in FIG. 1, a rotor cover 37 is provided on the upper rear side of the rotors 27 a and 27 b so that mud is not applied to the floats 55 and 56.

  In this embodiment, the control sensitivity change dial (not shown) provided in the vicinity of the seat 31 is adjusted in accordance with the hardness of the field to adjust the vertical position of the seedling planting portion 4 by expansion and contraction of the lifting hydraulic cylinder 46. The control sensitivity can be changed to multiple stages. For each set value of the control sensitivity by the control sensitivity change dial, a plurality of front and rear tilt angles (elevation angles) are set to the front rising side when the field is hard, and to the front lowering side when the field is soft. Different angles are set.

  Therefore, the raising / lowering hydraulic cylinder 46 is expanded and contracted by the control device 100 so that the detected value of the elevation angle sensor becomes the inclination angle of the center float 55 set by the control sensitivity change dial, and the seedling planting device 4 is controlled to be the set vertical position.

  At this time, if the field is hard, the control sensitivity of the elevating hydraulic cylinder 46 is made insensitive by the control sensitivity change dial. In conjunction with this, the vertical positions of the rotors 27a and 27b are corrected to the ascending side and leveling is performed. To do. On the contrary, if the field is soft, the control sensitivity change dial makes the control sensitivity of expansion / contraction of the lifting hydraulic cylinder 46 a sensitive side, and in conjunction with this, the vertical position is corrected to the downward side to level the ground. Thereby, the difference in the ground height of the rotors 27a and 27b can be suppressed by the difference in the front and rear inclination angle (the elevation angle) of the center float 55 due to the control sensitivity change. Further, when the rotors 27a and 27b are inserted deeply in a field where the soil is hard, it is possible to suppress a problem that the rotors 27a and 27b have a large driving resistance, and it is possible to prevent damage to the linkage mechanism B (described later) and a decrease in traveling speed ( FIG. 6). In this way, a stable leveling effect can be achieved according to the hardness of the field.

  Further, by adjusting the inclination angle of the swash plate of the trunnion shaft of the hydrostatic continuously variable transmission (HST) 23, it is interlocked with the shift lever 16 (FIG. 2) that changes the output of the HST hydraulic motor (not shown). Thus, if the rotors 27a and 27b are automatically moved to the storage position (upward position) by the rotor lifting / lowering motor 63, the rotors 27a and 27b do not push mud and water in the field during high-speed travel. For this reason, it is possible to prevent the adjacent existing seedlings from being defeated by the muddy water flow.

  When the center rotor 27b, which is only suspended by the spring 78 when the seedling planting part 4 is raised, comes to a position where it comes into contact with the lower link 41, the rotor 27b bounces and damages the rotor 27b. There is a risk that. Further, if the rotor 27b is submerged in Fukada, the rotor 27b may be damaged in this case as well.

Therefore, as shown in FIG. 4, when the center rotor 27b approaches the lower link 41, a hook 101 provided on the lower link 41 is provided with a locking portion 37aa provided at the front end of the upper portion 37a of the cover 37 of the center rotor 27a, 27b. If the center rotor 27b and the lower link 41 are damaged, there is no possibility of damage.

  In this embodiment, three hook clutch operating levers 19 are installed on the left and right sides of the cockpit 31, and one hook clutch operating lever 19 is planted for two adjacent strips combined from both the left and right ends of the traveling vehicle body 2. The appendage 52 is configured to be operated as a unit as a set.

  A bent piece 82 is fixed to the lower end portion of the rotor vertical position adjusting lever 81, and the bent piece 82 is rotatably supported by the support frame 65 (FIGS. 4 and 5). When the lever 81 is rotated in the left-right direction of the vehicle, the lever 81 is bent near the protrusion 66a fixedly supported by the beam member 66 that is rotatably supported by the side members 65b of the support frame 65. The piece 82 rotates up and down. Since the bent piece 82 is locked below the protruding portion 66a, the protruding portion 66a is rotated upward about the beam member 66 when the lever 81 rotates in the right direction of the traveling vehicle body. By the rotation of the projecting portion 66a, the end of the first link member 76 opposite to the connecting portion with the beam member 66 is also rotated upward about the beam member 66. By rotating the first link member 76 upward, the rotor 27b can be lifted upward via the second link member 77 and the spring 78. When the rotor 27b is moved upward, the rotor 27a is also simultaneously moved upward via the drive shaft 70b and the drive shaft 70a.

  Since the rotor vertical position adjusting lever 81 is provided at substantially the center of the vehicle body 2, it is easy to balance the left and right when the rotors 27a and 27b are moved up and down.

  Further, when the seedling planting section 4 is lowered to the field, the cable 45 for returning the seedling planting section 4 to the horizontal position is connected to the pulling spring section including the link members 76 and 77 of the center rotor 27b and the spring 78 and the hydraulic piston 46. It was linked with.

  FIGS. 8 and 9 are side views of the main part of the linkage mechanism A that performs “on / off” of a hook clutch (not shown) that is interlocked with the raising and lowering of the seedling planting part 4. FIG. FIG. 9 is a conceptual diagram of an action mechanism of a clutch (not shown) and the saddle clutch lever 19, and FIG. 9 is an exploded perspective view of a main part of the saddle clutch lever 19 of the linkage mechanism A.

  FIG. 8 shows the configuration of the linkage mechanism A until the upward movement of the upper link 40 is converted into the tension of the automatic return cable 48 and the hook clutch operating lever 19 is set to the “on” state by the tension of the automatic return cable 48. It is a figure. In addition, the member which comprises the cooperation mechanism A is mentioned later.

  Two small holes 115a and 115b are provided at one end of the "<"-shaped cam 115, respectively. In addition, a hole 115d for rotatably installing a shaft 117a for rotating the cam 115 in the cam support plate 117 is provided in the vicinity of the bending position of the "<"-shaped cam 115. It is the fulcrum of the rotational movement.

  A disc-shaped roller 118 is attached to the tip of the support piece 40b provided on the upper link 40, and the edge 115e on the rear side surface of the upper portion of the cam 115 with which the circumference of the roller 118 abuts is formed in a convex shape, Further, the edge 115f on the rear side surface of the lower portion is formed in a concave shape, and the roller 118 moves upward and downward as the upper link 40 moves up and down between the upper convex edge 115e and the lower concave edge 115f. Slope 115s is provided so that it can go down.

  When the roller 118 moves from the lower concave edge 115f provided on the side surface of the cam 115 to the upper convex edge 115e as the upper link 40 rises, the tension of the automatic return cable 48 is increased by the upper convex edge 115e. Therefore, by appropriately arranging the position of the slope 115s, it is possible to determine the timing for setting the saddle clutch operation lever 19 to the “ON” state.

  When the upper link 40 is lowered, a gap is provided between the lower concave edge 115f and the roller 118 so that play is generated in the operation of the cam 115 associated with the roller 118 rising together with the upper link 40. Defects can be prevented and stable operation of the cam 115 can be realized.

  A small hole 115b of the cam 115 is rotatably connected with tension so that the automatic return cable 48a does not bend. A cam support plate 117 for fixing the cam 115 rotatably is fixed to the link base frame 42 supported by the traveling vehicle body 2 so that the side surface of the plate 117 faces the side surface of the traveling vehicle body. The bent piece 117b provided in front of the cam support plate 117 is provided with a groove 117c for supporting the automatic return outer cable 49 and the like that wraps the automatic return cable 48a in a sheath shape.

  Further, the bent spring 117b near the groove 117c of the cam support plate 117 and the cam 115 near the small holes 115a and 115b are connected to the tension spring 113 so that the lower end of the cam 115 is pulled forward even when the upper link 40 is lowered. Install it over the bridge.

  From the connecting member 112 shown in FIG. 10 to the groove 117c for fixing the automatic return outer cable 49 provided on the cam support plate 117, the automatic return cable 48 is wrapped and fixed by the automatic return outer cable 49 in a sheath shape. The

On the other hand, FIG. 9 is an exploded view showing a main part until the tension of the automatic return cable 48 of the linkage mechanism A acts as a force for tilting the saddle clutch lever 19.
At the lower end of the eaves clutch operating lever 19, a cylindrical hub 19 a that functions as a support shaft that rotates by the operation of the eaves clutch operating lever 19 is installed so as to be positioned in the left-right direction of the traveling vehicle body 2. . At this time, the rotation shaft 22 passes through the central axis of the hub 19a, and rotation about the axis of the hub 19a is possible.

  A contact arm 109 facing the front of the traveling vehicle body is fixed to the clutch cable hub 19a, and has a structure that rotates in the vertical direction around the rotation fulcrum of the hub 19a as the hub 19a rotates.

  The contact arm 109 is installed with both surfaces sandwiched from both sides of the cam support plate 117 so as to be in contact with a pin 107 of a lever operation arm 110 (to be described later) when rotating from below to above. In FIG. 9, the contact arms 109 exist on the left and right sides of the lever operation arm 110, and the left and right contact arms 109 are pushed downward by the pins 107.

  In the side view, the hub 19a penetrates in the vicinity of the bent portion of the lever-operating arm 110 having the shape of "", and functions as a pivotal fulcrum of the lever operating arm 110. Moreover, a hole for rotatably connecting a “U” -shaped locking member 83 to which the automatic return cable 48 is connected is provided at one end of the “U” -shaped lever operation arm 110 in a side view. At the other end, a pin 107 facing the left-right direction of the traveling vehicle body 2 is fixed, and the contact arm 109 collides from above the pin 107 by the rotational movement of the contact arm 109 and pushes down the lever operation arm 110. Is possible.

  At this time, the lever operating arm 110 uses the saddle clutch cable hub 19a as a “fulcrum”, the connection position with the locking member 83 connected to the automatic return cable 48 as “force point”, and the pin 107 as “action point”. Acting as a lever, it is possible to efficiently transmit the tension of the automatic return cable 48 as a force for raising and lowering the hook clutch lever 19 and an “on / off” force of the hook clutch (not shown).

  Of the above-described configuration of this embodiment, the upward movement of the upper link 40 is converted into the tension of the automatic return cable 48, and the tension of the automatic return cable 48 is switched to the “ON” state of the 畦 clutch lever operation arm 110. This mechanism is called linkage mechanism A.

  The cooperation mechanism A mentioned above can apply the cooperation mechanism A also to the multi-plant planting rice transplanters, such as 6 to 10 articles used widely. In this case, the linkage mechanism A includes an automatic return cable 48 and a cam 115.

  FIG. 10 is a conceptual diagram when the action mechanism of the saddle clutch and the saddle clutch lever 19 of FIG. 8 is applied to a six-planted rice transplanter.

  FIG. 10 shows an embodiment of the six-row planting rice transplanter of FIG. 1. Three hook clutch operating levers 19 are installed, and an automatic return cable 48b is connected to each of the three hook clutch operating levers 19. Has been.

  In the automatic return cable 48b, the movement of the upper link 40 that raises the seedling planting portion 4 is transmitted by the linkage mechanism A, and the plurality of heel clutch operating levers 19 are connected from the “OFF” state to the “ON” state almost simultaneously. Because of the mechanism, each of the three automatic return cables 48b is connected to one automatic return cable 48a via the connecting member 112 while maintaining a constant tension so that the automatic return cable 48 does not bend. Is done.

  The linkage mechanism A in this case includes an automatic return cable 48a that links the cam 115 and the connecting member 112, and a plurality of automatic return cables 48b that link the connecting member 112 and each of the plurality of saddle clutch operating levers 19.

  The linkage mechanism A from the upper link 40 to the heel clutch operating lever 19 is configured to switch all heel clutches to “ON” in conjunction with the ascent of the seedling planting section 4 (this is called “automatic return of heel clutch”). When the seedling planting part 4 is raised and the seedling planting part 4 is raised by raising the seedling planting part 4 and turning it to change the direction of the traveling vehicle body at the end of the field, It is possible to enter the “on” state, and it is possible to start seedling planting at the same time that the seedling planting unit 4 descends immediately after the direction of the traveling vehicle 2 at the end of the field is changed.

  This configuration also makes it possible to prevent the occurrence of a place where seedlings cannot be planted at the end of the field, and there is no need for the operator to plant seedlings manually in the field where seedlings were not planted. Labor is reduced and work efficiency is improved.

  FIG. 11 (a) shows the tension of the automatic return cable 48 to the linkage mechanism A and the linkage mechanism A that bring the clutch operating lever 19 into the “on” state by the upward movement of the upper link 40 in the linkage mechanism A shown in FIG. It is the principal part side view which showed together the mechanism which makes "engagement" of a saddle clutch (not shown).

  In FIG. 11A, as described above with reference to FIG. 8, the pin 107 is pushed down the contact arm 109 as the lever operation arm 110 is rotated by the tension of the automatic return cable 48 as the upper link 40 is raised. In addition to the structure, the arm 102 is fixed to the saddle clutch cable hub 19a so as to be substantially perpendicular to the contact arm 109, a pin 108 is installed at the tip of the arm 102, and the contact arm 109 and the arm are rotated along with the rotation of the hub 19a. 102 is a view showing a structure in which the hub 19a rotates in the vertical direction around the hub 19a.

  A pin 108 at the tip of the arm 102 is rotatably installed at one end of the first U-shaped first plate 119 in a side view of the traveling vehicle 2 and connected to a hook clutch at the other end. A locking member 84 to which the hook clutch cable 24 to be connected is connected is rotatably installed. The structure of the locking member 84 is connected to the hook clutch cable 24 and the first plate 119 in the same manner as the locking member 83 (FIG. 11A).

  FIG. 11B is an enlarged perspective view of a main part of a connection portion between the locking member 83 and the lever operation arm 110. The "U" -shaped locking member 83 has a pair of opposing side surfaces 83b and 83c, and a side reference surface 83d that connects one ends of the opposing side surfaces 83b and 83c at a substantially right angle. Each of the opposing side surfaces 83b and 83c is connected to one end of a lever-operating arm 110 having a “h” shape in a side view and a locking member 83 so as to be rotatable by a rotation shaft 86. Arranged to be engaged with the locking member 83, the rotation shaft 22 is passed through the through hole in the hub 19 a, and the lever operation arm 110, the contact arm 109, and the arm 102 can be rotated around the rotation shaft 22. To support. A small hole is provided in the reference surface 83d of the locking member 83 in order to fix the automatic return cable 48, and the automatic return cable 48 is installed by a fixing tool through the small hole.

  In FIG. 11A, both ends of the “U” -shaped first plate 119 in a side view are installed so as to face the back of the traveling vehicle 2. The lever operating arm 110 is rotated about the rotating shaft 22 counterclockwise by the tension of the automatic return cable 48 generated when the upper link 40 is raised, and the pin 107 installed on the lever operating arm 110 is operated by the lever. The contact arm 109 is rotated downward by pushing down the contact arm 109, and the arm 102 is rotated in the same direction as the contact arm 109 is rotated. As the arm 102 rotates rearward, the end of the first plate 119 to which the hook clutch cable 24 is connected moves forward, and as a result, the hook clutch (not shown) becomes “ON”.

  At this time, when the heel clutch lever 19 is pulled up, the arm 102 rotates clockwise about the rotation shaft 22, and the lower end portion connected to the pin 108 of the first plate 119 moves backward, The upper end point to which the locking member 84 is connected moves rearward, and the hook clutch cable 24 moves rearward. As a result, the hook clutch (not shown) is turned off.

  That is, the above-described configuration has a function in which the hook clutch lever 19 is pushed down as the upper link 40 is raised, the hook clutch is “on”, and when the hook clutch lever 19 is pulled up, the hook clutch is “disengaged”.

  In FIG. 12, one end of a “U” -shaped first plate 119 and second plate 120 is rotatably installed on a pin 108 provided at an end of the arm 102 shown in FIG. A locking member 85 for fixing the cable 46 is rotatably installed at the other end of the two plates 120, and the tension of the automatic return cable 48 generated by the rise of the upper link 40 is linked as the tension of the cable 46. This is an embodiment in which a fertilizer application clutch (not shown) and a seedling feeding belt clutch (not shown) can be set to the “off” state.

  A mechanism for interlocking the tension of the automatic return cable 48 constituting this embodiment with a fertilizer application clutch (not shown) or a seedling feeding belt clutch can be freely rotated by the arm 102 in addition to the members shown in FIG. The second plate 120 is installed, the locking member 85 is rotatably connected to the second plate 120, and the clutch cable 46 is connected to the locking member 85.

  Next, the details of the mode of action of each member will be described.

  The second plate 120 has a “U” shape in a side view, and the second plate 120 and the arm 102 are rotatably connected to one end of the second plate 120 via a pin 108. The other end of the second plate 120 is rotatably connected to a locking member 85 to which one end of the cable 46 is fixed. The connection mode is the same as that of the locking members 83 and 84 described above.

  The cable 46 is connected to a fertilizer application clutch (not shown) and a seedling feeding belt clutch (not shown), and is adapted to the tension of the cable 46 accompanying the movement of the second plate 120 in the front-rear direction as the arm 102 rotates. Accordingly, the fertilizer application clutch and the seedling feeding belt clutch are “on / off”.

  引 き 上 げ When pulling up the clutch lever 19 upward, the arm 102 rotates with the rotation of the hub 19a, and when the end of the second plate 120 to which the pin 108 of the arm 102 is connected rotates upward in the forward direction. The inner side of the “U” to which the pin 108 of the second plate 120 is connected and the hub 19a contact each other. Thereafter, when the hook clutch lever 19 is further pulled up, the point connected to the pin 108 of the second plate 120 is the “power point”, the contact point between the hub 19a and the second plate 120 is the “fulcrum”, and the second plate 120 is engaged. By the “lever principle” in which the connection part of the stop member 85 is the “action point”, the force of pushing up the hook clutch lever 19 is reduced, and it is possible to efficiently apply the force to the “action point”. Make sure to turn on / off.

  In FIG. 13, a clutch cable 99 for turning on / off the rotation of the rotors 27a and 27b is rotatably connected to a small hole 115a for cable connection provided at one end of the cam 115. The clutch cable 99 is pulled by the movement of the cam 115 accompanying the ascent, and the ground leveling rotor clutch 39 is set to the “disengaged” state to stop the rotors 27a and 27b (FIG. 6), thereby turning the traveling vehicle body 2 at the field end. The leveling device 27 is stopped to prevent idling of the rotors 27a and 27b, thereby preventing waste of driving force and scattering of mud adhering to the rotors 27a and 27b. In this embodiment, when the upper link 40 is lowered, the leveling rotor clutch 39 is set to the “ON” state to prevent forgetting to level at the field end.

  Here, a mechanism constituted by the cam 115, the clutch cable 99, and the clutch shifter 97 until the upward movement of the upper link 40 is transmitted to the leveling rotor clutch 39 is referred to as a linkage mechanism B (FIGS. 6 and 13).

  According to the configuration of this embodiment, the upward movement of the upper link 40 causes the linkage mechanism B to move simultaneously with the action of the linkage mechanism A that sets the hook clutch operating lever 19 to the “ON” state and the hook clutch (not shown) to “ON”. Thus, the leveling device clutch 39 in the rotor drive case 87 can be set to the “disengaged” state, and the leveling device clutch 39 is set to the “on” state in conjunction with the lowering of the lifting / lowering link device 3. Since the saddle clutch that is in the “on” state due to the rise of the link device 3 is maintained in the “on” state, it is possible to prevent the forgetting operation of the leveling device 27 during the headland leveling work. A rough headland is surely leveled by turning the vehicle body 2, and both the leveling of the field and planting of seedlings are possible immediately after the direction of the traveling vehicle body 2 at the field edge is changed.

  The present invention has a great potential for use as a configuration that gives various functions to the transmission path of the seedling planting portion of the rice transplanter.

DESCRIPTION OF SYMBOLS 1 Riding type rice transplanter with fertilizer 2 Traveling vehicle body 3 Elevating link device 4 Seedling planting part 5 Granule feeding device (fertilizer) 10 Front wheel 11 Rear wheel 11a Rear wheel drive shaft 12 Mission case 13 Front wheel final case 15 Main frame 16 Shift lever 17 Left and right seedling slider support 18 Rear wheel gear case
19 畦 Clutch operating lever 19a Hub 20 Engine 21 Belt transmission 22 Rotating shaft 23 HST
25 planting clutch case 26 planting transmission shaft 27 (27a, 27b) rotor 27a1 rotor 28 fertilizer cooperation mechanism 29 disc 30 engine cover 31 seat 32 front cover 34 handle 35 floor step 36 rear step 37 rotor cover 37a upper part 37b rear part 38 Preliminary seedling stage 39 Leveling rotor clutch 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 46 Lifting hydraulic cylinder 48 Automatic return cable 49 Automatic return outer cable 50 Transmission case 51 Seedling stage 51a Seedling outlet
51b Seedling feeding belt 52 Seedling planting device 52a Seedling planting tool 53 Blower electric motor 55 Center float 56 Side float 58 Blower 59 Air chamber 60 Fertilizer hopper 61 Feeding section 62 Fertilizer hose 63 Rotor lifting motor 65 Support for seedling planting section Frame 65a Support roller 65b Both side members 66 Beam member 67 Support arm 68 Rotor support frame
69 Groove body 70 (70a, 70b) Drive shaft 70b 'Universal joint 71 Seedling planting device connecting member
72 Universal Joint 73 Chain Case 74 Reinforcing Member 74a Mounting Piece
76 First link member 77 Second link member 78 Spring 80 Guide 81 Rotor vertical position adjusting lever 82 Bending pieces 83, 84, 85 Locking member 86 Rotating shaft 87 Rotor drive case 94 Lift link sensor 96 Rotor interlock on / off switch 97 Clutch shifter 99 Clutch cable 100 Control device 101 Hook 102 Arm 107, 108 Pin 109 Contact arm 110 Lever operation arm 112 Connecting member 113 Spring 114 Roller (description)
115 cam 117 cam support plate 118 roller 119 first plate 120 second plate A, B cooperation mechanism

Claims (4)

A traveling vehicle body (2) having a pair of front and rear wheels (10, 11);
A steering device (34) for turning the traveling vehicle body (2), a seedling mounting base (51) on which seedlings to be planted in a farm are loaded at the rear of the traveling vehicle body (2), and a seedling from the seedling mounting platform (51) A seedling planting part (4) having a planting device (52) provided with a plurality of seedling planting tools (52a) for taking and planting in a field;
Elevating and lowering link device (3) for raising and lowering the seedling planting part (4),
The transmission of the driving force to the seedling planting part (4) is turned on and off, and the transmission of the driving force of each planting device (52) corresponding to a specific planting line among the plurality of lines is turned on and off. A plurality of hook clutches, a plurality of hook clutch operating levers (19) for respectively operating the plurality of hook clutches,
Leveling devices (27a, 27b) which are arranged so as to be movable up and down with respect to the seedling planting part (4) and in the lateral width direction of the traveling vehicle body (2) and ground the ground by grounding;
Leveling device clutch (rotor clutch) (39) for turning on and off the driving force to the leveling device (27a, 27b)
In the seedling transplanter provided with
The elevating link device (3) and the eaves clutch operating lever for switching all the eaves clutch operating levers (19) in conjunction with the raising and lowering of the seedling planting part (4) by the elevating link device (3) A seedling transplanter comprising a linkage mechanism (A) including a pulling member (48) that links (19).   In conjunction with the raising of the seedling planting part (4) by the lifting link device (3), the leveling device clutch (39) is turned off, and the seedling planting part (4) by the lifting link device (3) ), The linkage mechanism (B) for connecting the elevating link device (3) and the leveling device clutch (39) to “turn on” the leveling device clutch (39) in conjunction with the lowering of the leveling device. The seedling transplanter according to claim 1, wherein: The pulling member (48), which is a constituent member of the linkage mechanism (A), includes a first pulling member (48a), a second pulling member (48b), and a connecting member (112).
One end of the first pulling member (48a) is connected to the base of the interlocking member (115) that rotates in conjunction with the lifting and lowering of the seedling planting part (4) by the lifting link device (3),
In cooperation with one end of the second traction member (48b) of the plurality of hook clutch operating lever (19),
The seedling transplanter according to claim 1 or 2, wherein the other end of the first pulling member (48a) and the other end of the plurality of second pulling members (48b) are connected to a connecting member (112). The central portion of the lever operating arm (110) is rotated by the hub (19a) that rotates about the rotating shaft (22) provided on the traveling vehicle body (2) while supporting the saddle clutch operating lever (19). Install freely,
A pin (107) is provided at one end of the lever operating arm (110),
A contact arm (109) that pushes the pin (107) when the hub (19a) rotates in one direction is fixed to the hub (19a),
The seedling transplanting machine according to claim 3, wherein a locking member (83) having one end of the second pulling member (48b) connected to the other end of the lever operating arm (110) is rotatably connected. .

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