JP2014039511A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice transplanter capable of identifying the operation position of an inter-seedling speed changing lever for operating an inter-seedling speed changing device and the operation position of an operation lever for operating a power transmission switchover mechanism.SOLUTION: On a first power transmission shaft 43, a sparse planting side gear set 70 and a dense planting side gear set 71 are arranged at a predetermined interval, and an inter-seedling speed changing gear 72, which selectively engages with the sparse planting side gear set 70 and the dense planting side gear set 71 in a manner sliding in an axial direction of a second power transmission shaft 46, forms a neutral position that cuts off power transmission between an engine 15 and a transplanting work machine 9 at the predetermined interval where the inter-seedling speed changing gear 72 engages with neither the gear set 70 nor the gear set 71. With respect to the neutral position, tilting an inter-seedling speed changing lever 75 to one side selects a wide inter-seedling space (inter-seedling space for sparse planting) and tilting the inter-seedling speed changing lever 75 to the other side selects a standard inter-seedling space (inter-seedling space for dense planting).

Description

  The present invention relates to a rice transplanter for planting seedlings in a field while traveling, and more particularly, to an inter-strain transmission that adjusts the seedling planting interval (between plants).

  Generally, it is transmitted from the engine to the planting machine in the mission case so that the planting interval (between the plants) of the seedling with respect to the vehicle speed can be adjusted to switch between dense planting that narrows the plants and sparse planting that wides the plants. A rice transplanter equipped with an inter-strain transmission that shifts the rotation is known. In addition, a constant speed rotation state in which the rotation from the engine is transmitted to the planting work machine at a constant speed rotation, and the rotation of the engine is rotated at a non-uniform speed so as not to move quickly in the field and form a large hole in the field. There is known a rice transplanter equipped with a transmission switching device for switching to an inconstant speed rotation state transmitted to a planting work machine.

  Conventionally, when the inter-gear transmission is densely planted (high speed), the planting claw moves at a high speed. Therefore, the transmission switching device is switched to a constant speed rotation state so that the planting claw moves relatively gently on the surface. Therefore, when the inter-gear transmission is sparsely planted (low speed), the planting claw is moved at a low speed. However, a rice transplanter has been devised that quickly moves in the field and prevents the formation of large holes in the field (see Patent Document 1).

Japanese Patent No. 3776044

  In the above-mentioned Patent Document 1, in the inter-shaft transmission, one of the gear trains in which the clutch ball is engaged by operating the speed change operation shaft among the six gear trains having different outer diameters. To change the speed and transmit to the planting machine. The gear ratios of the six gear trains are adjusted so as to be between densely planted strains having a size of about 16 cm, 18 cm, 21 cm, and 24 cm, and between sparsely planted strains of 26 cm and 30 cm, respectively, and close to each other. Are arranged. The operator operates the inter-shaft transmission and transmission switching device with each operation lever, but confirms by checking the mark or instruction manual etc. which stock size is between densely planted plants or between sparsely planted plants, and responds to this. Therefore, it is necessary to appropriately switch the transmission switching device to the constant speed rotation state or the non-constant speed rotation state, and it may be difficult to understand at a glance whether the combination of the operation levers of the inter-strain transmission device and the transmission switching device is correct or erroneous operation may occur. There was a problem that there was.

  Therefore, the present invention provides a rice transplanter in which the densely planted side gear group and the loosely planted side gear group of the inter-variety transmission are arranged at a predetermined interval, and the predetermined interval constitutes a neutral position, thereby solving the above-described problems. The purpose is to provide.

The present invention includes a traveling machine body (5) equipped with an engine (15), a planting work machine (9) provided behind the traveling machine body (5) for planting seedlings in a farm field, and the engine (15). The inter-plant transmission (47) that changes the rotation of the engine (15) and changes the rotation of the engine (15) to a constant speed rotation state or a non-constant speed rotation state. In the rice transplanter (1) provided with a transmission switching mechanism (48) for transmitting to the attached work machine (9),
The inter-stock transmission (47) includes a first transmission shaft (43), a second transmission shaft (46) arranged in parallel with the first transmission shaft (43), and the first transmission A sparsely planted side gear set (70) and a densely planted side gear set (71) disposed at a predetermined interval on the shaft (43), and the second transmission shaft (46) disposed on the second transmission shaft (46). An inter-strain transmission gear (72) that shifts in the axial direction of the shaft (46) and selectively meshes with each gear of the sparsely planted side gear group (70) and the densely planted side gear group (71),
The predetermined interval is such that the inter-strain transmission gear (72) does not mesh with both the loose planting gear set (70) and the dense planting gear set (71), and the engine (15) and the planting work machine ( 9) A neutral position that cuts off power transmission to and from is configured.
It is characterized by that.

For example, referring to FIGS. 4 and 5, the inter-variety transmission (47) includes a shifter (73) that shifts the inter-variety transmission gear (72) and an inter-variety transmission lever (75) that operates the shifter (73). And a detent mechanism (76) for positioning the shifter (73),
The detent mechanism (76) stops and positions the shifter (73) at the neutral position.

For example, referring to FIG. 9 and FIG. 10, an inter-stock shift display plate (106 ₁ ) for displaying the operation position of the inter-stock shift lever (75) is provided.
The inter-strain shift display plate (106 ₁ ) includes a sparsely planted inter-strain display unit (106a) indicating a range in which the inter-strain shift gear (72) selectively meshes with each gear of the sparsely planted gear set (70). The dense planting side inter-strain display unit (106b) showing the range of selectively meshing with each gear of the dense planting side gear set (71), the sparse planting side inter-strain display unit (106a), and the dense planting side inter-strain display unit (106b) ) And a neutral display section (106c) indicating the neutral position.

For example, referring to FIG. 10 and FIG. 11, the inter-strain shifting display plate (106 ₁ ) is color-coded in the sparsely planted inter-strain display unit (106a) and the densely planted side interstrain display unit (106b),
A transmission switching display plate (107 ₁ ) for displaying the operation position of the operation lever (95) of the transmission switching mechanism (48);
The transmission switching display board (107 ₁ ) includes a constant speed rotation display unit (107b) indicating a range in which the rotation of the engine (15) is transmitted to the planting work machine (9) in a constant speed rotation state, and the engine An inconstant speed rotation display portion (107a) indicating a range in which the rotation of (15) is transmitted to the planting machine (9) in an inconstant speed rotation state,
The constant speed rotation display part (107b) and the non-constant speed rotation display part (107a) are the sparsely planted inter-strain display part (106a) and the densely planted side interstrain display part of the inter-strain shift display plate (106 ₁ ). Color-coded so as to correspond to the color-coded color of (106b).

  In addition, although the code | symbol in the said parenthesis contrasts with drawing, it has no influence on description of a claim by this.

  According to the first aspect of the present invention, the sparsely planted gear set and the densely planted gear set are separated by a predetermined distance so that the inter-gear transmission gear is in a neutral position that does not mesh with both the sparsely planted side gear group and the densely planted side gear group. Since the neutral position is used as a reference, it is easy to understand that one side is the sparse planting side and the other side is the dense planting side. It is possible to prevent erroneous operation when switching to the high speed rotation state or the constant speed rotation state.

  According to the second aspect of the present invention, since the detent mechanism is provided so that the shifter stops and positions at the neutral position, the operator can easily recognize the neutral position, and the neutral position is used as a reference. Thus, it is possible to easily recognize the setting between the sparsely planted strains or the densely planted strains of the inter-strain transmission.

  According to the third aspect of the present invention, the inter-gear shift lever is located between the sparsely-growth strains of the inter-gear transmission by visually recognizing the sparsely planted inter-matter display part, the dense-growth side inter-strain display part and the neutral display part. Therefore, it is possible to confirm which position is set between the dense planting positions and the neutral position, and it is possible to prevent erroneous switching between the constant speed rotation state and the non-constant speed rotation state of the transmission switching mechanism corresponding thereto. Moreover, when performing maintenance of the planting work machine, the inter-strain transmission can be easily set to the neutral position, and maintainability can be improved.

  According to the fourth aspect of the present invention, the constant speed rotation display unit and the non-uniform speed rotation display are provided so as to correspond to the color-coded colors of the sparsely planted side interstitial display unit and the densely planted side interstrain display unit of the intercultural transmission display panel. Since the parts are color-coded, the correspondence can be confirmed at a glance.

The whole side view which shows the rice transplanter which concerns on embodiment of this invention. The whole top view. The power transmission diagram which shows the power transmission of the rice transplanter which concerns on embodiment of this invention. The expanded view which shows the mission case which concerns on embodiment of this invention. The rear view which shows the inter-company transmission which concerns on embodiment of this invention. It is a figure which shows the transmission switching mechanism which concerns on embodiment of this invention, Comprising: (a) is a front view, (b) is an expanded view of the case. The side view which shows the operation lever of the transmission between strains which concerns on embodiment of this invention, and a transmission switching mechanism. The rear perspective view which shows the traveling body which concerns on embodiment of this invention. The top view which shows the opening part provided in the traveling body which concerns on embodiment of this invention. It is a figure which shows the stock change display board which concerns on embodiment of this invention, Comprising: (a), (b) is a thing of previous embodiment, (c) is a thing of another embodiment. It is a figure which shows the transmission switching display board concerning embodiment of this invention, Comprising: (a), (b) is a thing of previous embodiment, (c) is a thing of another embodiment. The rear view which shows the modification of arrangement | positioning of the inter-strain shift display board.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the rice transplanter 1 includes a traveling machine body 5 supported by a pair of left and right front wheels 2 and a rear wheel 3, and a hydraulic cylinder 6 and a link mechanism 7 behind the traveling machine body 5. And a planting machine 9 that is connected so as to be movable up and down.

  The planting machine 9 has a seedling platform 10 on which mat seedlings are placed, and a planting device 11 for planting seedlings in a farm field, and the planting device 5 according to the traveling of the traveling machine body 5. 11 of the planting claws 12 rotate to scrape off seedlings from the seedling platform 10, and the seedling platform 10 moves laterally in accordance with the progress of the planting operation. It is configured to plant seedlings in a field at a predetermined planting interval (between strains) by performing longitudinal feed driving that feeds mat seedlings placed in accordance with the cycle of the lateral feed drive in the vertical direction.

  The traveling machine body 5 is provided with an engine 15 (see FIG. 3) covered with a bonnet 13 at a front portion, and a driving operation portion 16 where a worker gets into the rear portion and performs a traveling operation. The driving operation unit 16 is provided with a steering handle 17, a driving seat 19, and the like, and a mission case 21 is provided below the main step 20 constituting the floor surface of the driving operation unit 16. Has been.

  Next, the power transmission structure of the rice transplanter 1 will be described. As shown in FIG. 3, the output from the engine 15 is transmitted to auxiliary equipment such as an oil pump 22, and a pulley 25 provided on the engine output shaft 23 and a pulley provided on the HST input shaft 26. 27 is wound around the belt 29 and output to a hydraulic continuously variable transmission (HST) 30.

  An output shaft of the HST 30 is connected to a mission input shaft 31 of the mission case 21 via a main clutch (not shown). The mission input shaft 31 transmits power from the engine 15 to the front wheels 2 and the rear wheels. A traveling branch gear 32 and a planting branch gear 33 branching to the traveling transmission system S that transmits to the wheel 3 and the planting transmission system rod that transmits to the planting work machine 9 are attached. The traveling branch gear 32 that branches power to the planting transmission system gear meshes with a gear 36 provided on the traveling first shaft 35 adjacent to the mission input shaft 31.

  The traveling transmission system S receives power branched by the meshing of the traveling branch gear 32 and the gear 36 via traveling first to third shafts 35, 37, 39 inserted in the transmission case 21. The power is input to the left and right front axles 40 and the power is transmitted to the front wheels 2, and the power is input from the traveling second shaft 37 to the rear axle 42 via the propeller shaft 41, and the power is transmitted to the left and right rear wheels 3. To do.

  On the other hand, in the planting transmission shaft, the planting branch gear 33 is a gear provided on a planted first shaft (first transmission shaft) 43 provided adjacent to and parallel to the mission input shaft 31. 45. The planting transmission system rod is a planting plant in which the power branched by the meshing of the planting branch gear 33 and the gear 45 is arranged in parallel with the planting first shaft 43 and the planting first shaft 43. It is transmitted to the planting PTO shaft 49 via the inter-strain transmission 47 provided on the attached second shaft 46 (second transmission shaft), and is changed to the constant speed rotation state or the non-constant speed rotation state by the transmission switching mechanism 48. Then, the planting PTO shaft 49 outputs the planting drive shaft 50 to the planting drive shaft 50. More specifically, the power output to the planted first shaft 43 is shifted to a predetermined number of stages (four stages in the present embodiment) by the inter-company transmission 47 installed in the transmission case 21, and The gear 52 is transmitted to the gear 52 via the torque limiter 51 provided at the end of the planting second shaft 46, and the gear 52 is engaged with the gear 53 provided at the end of the planting PTO shaft 49. Power is transmitted to the planted PTO shaft 49. The planting first shaft 43 and the planting second shaft 46 may be arranged on either the transmission upstream side or the transmission downstream side, the dense planting side gear set 71 is located upstream, and the inter-strain transmission gear 72 is You may comprise so that it may be located downstream. Further, a planting clutch 55 for connecting / disconnecting power transmission to the planting work machine 9 is interposed between the gear 53 and the planting PTO shaft 49. A fixed position stop clutch is sometimes used so that the planting claw 12 is not dragged to the farm scene.

  The planting drive shaft 50 has three sprockets 56 for inputting power to each planting device 11, and between the sprocket 56 and a sprocket 59 provided on the rotary shaft 57 of the planting device 11. The chain 60 is wound around. As a result, power is transmitted to the rotary shaft 57 of the planting device 11 so that the rotary case provided with the planting claws 12 at both ends can be rotated, and the gears incorporated in the rotary case can be engaged. The rotation is transmitted to the planting claw 12.

  Further, at the end of the planting drive shaft 50, a plurality of gears 63 each having a different number of teeth are arranged to mesh with a plurality of gears 62 that are spline-fitted to the shaft 61. By engaging with the drive gear 66 of the screw shaft 65 that moves the seedling platform 10 in the lateral direction, a lateral feed speed change mechanism 67 that changes the lateral feed speed of the seedling platform 10 is configured. The screw shaft 65 and the lateral feed speed change mechanism 67 constitute a lateral feed mechanism 68 that achieves the lateral feed drive of the seedling platform 10. A longitudinal feed drive cam 69 is provided at the inner end of the screw shaft 65, and a longitudinal feed lever (not shown) is intermittently lifted in accordance with the lateral feed of the seedling platform 10 to drive the longitudinal feed. The mechanism is driven to send out an appropriate amount of seedlings.

  Next, the stock transmission 47 will be described in detail. As shown in FIGS. 4 and 5, the inter-strain transmission 47 includes a set of two sparsely planted side gear sets 70 and a densely planted side that are integrally disposed with a predetermined interval on the planted first shaft 43. A gear set 71 and an inter-strain transmission gear 72 disposed on the planted second shaft 46 and capable of shifting in the axial direction of the planted second shaft 46 are provided. The sparsely planted side gear set 70 and the densely planted side gear set 71 are each composed of a shift gear and have a different number of teeth, and are selectively meshed with the two gears 72a and 72b of the inter-stock transmission gear 72. A total of 4 stages can be set between stocks.

  The transmission case 21 supports a shifter 73 for shifting the stock shift gear 72. The shifter 73 is provided with a switching arm 74 that engages with the stock shift gear 72 at the inner end thereof. At the same time, a stock shift lever 75 is linked to the outer end of the stock shift gear 72 so that the stock shift gear 72 can be shifted. An operating position of the inter-stock shift lever 75 for shifting the shifter 73 is positioned by a detent mechanism 76, and the detent mechanism 76 is formed on the compression spring 77 supported by the transmission case 21 and the shifter 73. And a ball 80 fixed to the tip of the compression spring 77 and urged to engage with one of the plurality of recesses 79. Five recesses 79 are formed on the shifter 73, and the transmission gear 72, the loose planting side gear set 70 and the dense planting side gear set 71 are selectively meshed with each other to perform four-stage stock setting. The inter-gear transmission gear 72 is disposed at a predetermined interval between the sparsely planted side gear set 70 and the densely planted side gear set 71, and does not mesh with both of the gear sets 70 and 71 and the planting 15 And a neutral (neutral) position that blocks transmission of power to and from the work machine 9.

  That is, when the inter-stock shift lever 75 is in the upright position where neither of the tilt levers is tilted, the ball 80 of the detent mechanism 76 is engaged with one of the five recesses 79 and positioned. At the same time, the inter-gear transmission gear 72 is arranged at the predetermined interval between the sparsely planted side gear set 70 and the densely planted side gear set 71 (position indicated by a broken line in FIG. 4) to be in the neutral position. When the inter-stock shift lever 75 is tilted to one side with respect to the upright position, the ball 80 is engaged and positioned with one located on the one side from the middle of the recess 79, and The inter-strain transmission gear 72 is selectively meshed with, for example, the sparse planting gear set 70 and set between the broad plants (between the sparse plants). When the inter-stock shift lever 75 is tilted to the other side with respect to the upright position, the ball 80 is engaged and positioned with one located on the other side from the middle of the recess 79, and The inter-strain transmission gear 72 is selectively meshed with, for example, the dense planting gear set 71 and set between standard strains (between dense plants). In the tilting operation of the inter-stock shift lever 75, the operator can easily recognize whether the current inter-stock setting is set between the broad stock or the standard stock by using the neutral position as a reference.

  Next, the transmission switching mechanism 48 will be described in detail. As shown in FIG. 6, an input shaft 82 that is an input side shaft, an output shaft 83 that is an output side shaft, and a counter shaft 85 are rotatably supported on the case 81 of the transmission switching mechanism 48. Has been. The input shaft 82 and the output shaft 83 are opposed to each other with a slight gap on one axis, and the counter shaft 85 is disposed in parallel with the input shaft 82 and the output shaft 83. An eccentric gear train formed by meshing these eccentric gears 86 and 87 is constituted by an eccentric gear 86 rotatably disposed on the input shaft 82 and an eccentric gear 87 spline-engaged with one end of the counter shaft 85. The circular gears 89 and 90 spline-engaged with the other end of the counter shaft 85 and the output shaft 83 are engaged with each other to form a circular gear train. The eccentric gear train and the circular gear train rotate the engine 15. Is changed to the non-uniform speed rotation state, and the non-uniform speed transmission path N that is transmitted to the planting work machine 9 is configured.

  A switching clutch 91 is spline-engaged at one end of the input shaft 82 so as to be slidable in the axial direction, and clutch claws 91 a and 91 b are provided on both side surfaces of the switching clutch 91. When the clutch pawl 91a is engaged with a clutch pawl 90a formed on one side of the circular gear 90, the power from the input shaft 82 is planted in a constant speed rotation state via the output shaft 83. Is transmitted to the machine 9 to form a constant speed transmission path E. Further, the clutch pawl 91 b is engaged with a clutch pawl 86 a formed on one side surface of the eccentric gear 86, whereby the power from the input shaft 82 is transmitted to the unequal speed transmission path N.

  On the upper side of the case 81, a shifter 92 slidable in the front-rear direction, a shifter arm 93 attached to the shifter 92, and an operation lever 95 (see FIGS. 7 and 1) are operated in the front-rear direction to thereby move the shifter 92. A link mechanism 96 for shifting 92 is provided. The shifter arm 93 is fitted in a fitting portion 91c formed in the switching clutch 91, and the switching lever 91 is operated through the link mechanism 96, the shifter 92, and the shifter arm 93 by operating the operation lever 95 back and forth. The clutch 91 slides, the clutch pawls 91a and 90a or the clutch pawls 91b and 86a are fitted, and the power is transmitted by being connected to the constant speed transmission path E or the non-constant speed transmission path N.

  The transmission switching mechanism 48 is a brake mechanism 97 that periodically brakes the power transmitted through the non-uniform speed transmission path N in order to prevent backlash of the transmission mechanism in the non-uniform speed rotation state. It has. The brake mechanism 97 is configured to periodically apply a braking force when a brake 101 urged by a spring 100 abuts on a brake cam 99 formed on the counter shaft 85.

  The operation lever 95 for switching the transmission switching mechanism 48 to the constant speed rotation state or the non-constant speed rotation state is provided to project upward from the case 81 via the link mechanism 96, as shown in FIGS. And is disposed in a seat cover 102 to which the driver's seat 19 is attached. The stock shift lever 75 for shifting the stock transmission 47 is provided so as to project upward from the mission case 21 and project upward from the rear cover 103 that covers the engine 15 together with the bonnet 13. Are arranged as follows.

More specifically, as shown in FIGS. 8 and 9, the rear cover 103 has an inclined surface 103a between the rear cover 103 and the main step 20, and an opening 105 is formed in the inclined surface 103a. Is provided. The inter-stock shift lever 75 is provided so as to protrude upward from the opening 105 and is configured so that an operator can easily tilt the inter-stock shift lever 75 in the left-right direction. The aforementioned strains shift lever 75 near the inside of the opening 105, it strains the speed indicator plate 106 ₁ for displaying the operating position of the strain between the shift lever 75 is mounted. Further, the upper surface of the seat cover 102, the transmission switching display plate 107 ₁ for displaying the operating position of the operating lever 95 is attached.

The hill space shift display panel 106 ₁ includes, as shown in FIG. 10 (a), the wide strains display unit indicating the range to selectively mesh with gears of the hill space shift gear 72 is the sparse planting side gear set 70 (sparse Planting side inter-strain display unit) 106a, a standard inter-strain display unit (dense planting side inter-strain display unit) 106b indicating a range of selectively meshing with each gear of the dense planting side gear set 71, the broad inter-strain display unit 106a and the standard The inter-strain display unit 106b is provided with a neutral display unit 106c indicating the above-described neutral position, and the broad-strain display unit 106a and the standard inter-strain display unit 106b are color-coded in different colors. . As shown in FIG. 10B, the neutral display unit 106c is omitted, and the inter-stock shift lever 75 is positioned between the broad stock display unit 106a and the standard stock display unit 106b. it may constitute between strains speed indicator plate 106 ₂ so as to constitute a neutral position.

Said transmission switching display panel 107 ₁ includes, as shown in FIG. 11 (a), non-uniform rotary display unit 107a indicating a range to transmit to the planting work machine 9 at non-uniform speed rotational state of the rotation of the engine 15 And a constant speed rotation display portion 107b indicating a range to be transmitted to the planting work machine 9 in a constant speed rotation state, and the non-constant speed rotation display portion 107a is the same as the inter-broad display portion 106a. The constant speed rotation display portion 107b is color-coded in the same color as the standard stock display portion 106b. In this embodiment, the wide stock display unit 106a and the non-uniform rotation display unit 107a, the standard stock display unit 106b and the constant speed rotation display unit 107b are color-coded in association with each other. The fast rotation display unit 107b, the standard stock display unit 106b, and the non-uniform rotation display unit 107a may be color-coded in association with each other. Further, as shown in FIG. 11B, the switching clutch 91 is positioned between the non-uniform speed rotation display unit 107a and the constant speed rotation display unit 107b, and the switching clutch 91 is connected to the non-uniform speed transmission path N and the uniform speed. both may be constituted a transmission switching display panel 107 ₂ comprising a neutral display portion 107c indicating a range that does not power transmission to the power transmission path E. The above-described combination of the inter-strain shift display plate and the transmission switching display plate is selected from four ways in which the inter-strain shift display plates 106 ₁ and 106 ₂ and the transmission switching display plates 107 ₁ and 107 ₂ are selectively selected one by one. However, in this embodiment, the case of the combination of the inter-strain shift display board 106 ₁ and the transmission switching display board 107 ₁ will be described, and description of other combinations will be omitted.

Since the present embodiment is configured as described above, the operator tilts the inter-company shift lever 75 protruding upward from the opening 105 to the left and right to shift the inter-strain transmission device 47. Operator, as well as confirm the position of the strain between the shift lever 75 between strains speed indicator plate 106 _1, is positioned by the detent mechanism 76, for example, set to one gear of the wide strains side. If the inter-strain is set to be a relatively wide stock, the planting seedling 12 may be in a poor posture due to the long time that the planting claws 12 are located in the field. The switching mechanism 48 is switched to the non-uniform speed rotation state. That is, the operator to remove the driver's seat 19, while confirming the transmission switching display panel 107 ₁ attached to the seat cover 102, and incline the operation lever 95 on one side in the longitudinal direction, non-uniform rotary Switch to transmit power in the state. At this time, the wide stock display portion 106a indicating the position of the inter-stock shift lever 75 on the wide stock side and the inconstant speed rotation display portion 107a indicating the position of the operation lever 95 on the inconstant speed rotation state side are colored in the same color. Therefore, the correspondence can be confirmed at a glance, and erroneous operation of the levers 75 and 95 and forgetting to operate can be prevented. In addition, since the neutral position defined by the detent mechanism 76 is used as a reference, it is easy to understand that the setting on the one side is a broad stock setting and the other side is a standard stock setting. Can be recognized.

In order to prevent planting defects caused by the large movement resistance that the planting claws 12 receive in the field, when the operator tilts the inter-strain shift lever 75 and sets the standard strain between the stocks, the transmission switching mechanism 48 is switched to the constant speed rotation state. After removal of the driver's seat 19, while confirming the transmission switching display panel 107 ₁ attached to the seat cover 102, the operation lever 95 and the tilting operation on the other side in the longitudinal direction, so that the power transmission in a constant speed state Switch to. At this time, the standard inter-stock display part 106b indicating the position of the inter-stock shift lever 75 on the standard inter-stock side and the constant speed rotation display part 107b indicating the position of the operation lever 95 on the constant speed rotation state side are colored in the same color. Therefore, the correspondence relationship can be confirmed at a glance, and erroneous operation or forgetting operation of each lever 75, 95 can be prevented.

When performing maintenance of the planting working machine 9, while confirming the strains speed indicator plate 106 ₁ is operated so that the strains shift lever 75 in a neutral position. In this case, it is possible to set the easy neutral by operating the strains shift lever 75 to fit the position of the neutral display portion 106c of the strains speed indicator plate 106 ₁ (neutral), possible to improve the maintainability Can do.

  Next, although other embodiments of the rice transplanter according to the present invention will be described, the same or equivalent parts as those of the previous embodiment will be denoted by the same reference numerals and description thereof will be omitted. For example, referring to FIG. 7, the rice transplanter 1 includes an operation lever 95 that protrudes upward from the case 81 and switches the transmission switching mechanism 48 to power transmission in an inconstant speed rotation state or a constant speed rotation state. Similarly, it is configured so that it can be tilted in the left-right direction, and the inter-stock transmission 47 is set between the wide stocks and the transmission switching mechanism 48 is set at the non-uniform speed rotation state, the inter-stock transmission 47 is set between the standard stocks and the transmission switching mechanism 48. The constant speed rotation state setting is achieved by tilting the stock shift lever 75 and the operation lever 95 in the same direction.

  An inter-stock shift display plate 109 for displaying an operation position of the inter-stock shift lever 75 is attached in the vicinity of the inter-stock shift lever 75 inside the opening 105. As shown in FIG. 10 (c), the inter-strain shift display plate 109 is configured to display a cross-strain display unit (sparse planting side) indicating a range in which the inter-strain transmission gear 72 selectively meshes with each gear of the sparse planting side gear set 70. Inter-strain display unit) 109a, a standard inter-strain display unit (standard inter-strain display unit) 109b indicating a range of selectively meshing with each gear of the densely planted gear set 71, the wide inter-strain display unit 109a, and the standard inter-strain display unit 109b, and a neutral display portion 109c indicating the above-described neutral position.

  On the upper surface of the seat cover 102, a transmission switching display board 110 for displaying the operation position of the operation lever 95 is attached. As shown in FIG. 11 (c), the transmission switching display plate 110 includes an inconstant speed rotation display portion 110a that indicates a range in which the rotation of the engine 15 is transmitted to the planting work machine 9 in an inconstant speed rotation state. And a constant speed rotation display unit 110b indicating a range to be transmitted to the planting work machine 9 in a constant speed rotation state.

  Since the present embodiment is configured as described above, while confirming the inter-company shift display plate 109, the inter-company shift lever 75 is tilted to the left and right so that the inter-strain transmission 47 is set between the wide stocks based on the neutral position. Or set between standard stocks. Next, while confirming the transmission switching display plate 110, the operation lever 95 is tilted in the same direction as the inter-stock shift lever 75, and the power is transmitted to the transmission switching mechanism 48 in the inconstant speed rotation state or the constant speed rotation state. Set as follows. With such a configuration, the operator can set the inter-company transmission 47 and the transmission switching mechanism 48 in association with each other simply by tilting the inter-company transmission lever 75 and the operation lever 95 in the same direction.

Incidentally, Hill space shift display panel 106 ₁ includes, as shown in FIG. 12, may be attached to the strains shift lever 75 near the rear cover 103 may be attached anywhere on the rice transplanter 1 is not limited thereto. Further, the eccentric gears 86 and 87 may be constituted by other non-circular gears, and may be anything as long as the rotation of the engine is changed to an inconstant speed rotation state.

  In addition, while the inter-stock shift lever is set to be in the neutral position when it is in the upright position, the neutral position is defined as a state where it is tilted by a predetermined amount to the left or right from the upright position, and one side is widened with reference to the neutral position. It is good also as a setting between stocks and the other side as a standard stock setting.

Also, strains the speed indicator plate 106 ₁ and the transmission switching display panel 107 ₁ includes sticker affixed to the machine body cover or the like, plate mounting a bolt or the like, the display surface that is colored directly to the fuselage cover, etc., strains shift lever 75 or Any device that displays the operation position of the operation lever 95 may be used. In addition, the wide stock display unit 106a, the standard stock display unit 106b, the non-uniform rotation display unit 107a, and the constant speed rotation display unit 107b may be divided according to patterns instead of colors. Any display method may be used.

  Further, not only the engine but also an electric or hydraulic motor may be used as the drive source, and a hybrid of these engine and motor may be used as the drive source. In the above-described embodiment, a riding type rice transplanter has been described as an example, but the present invention may naturally be applied to a walking type rice transplanter.

1 Rice transplanter 5 Traveling machine body 9 Planting work machine 15 Engine 43 Planted first shaft (first transmission shaft)
46 Planted second shaft (second transmission shaft)
47 Inter-strain transmission 48 Transmission switching mechanism 70 Unoccupied planting gear set 71 Dense planting gear set 72 Inter-strain shifting gear 73 Shifter 75 Inter-strain shifting lever 76 Detent mechanism 95 Operating levers 106 ₁ , 106 ₂ , 109 Inter-strain shifting display plate 106a Broad interstitial display Department (display section between sparsely planted plants)
106b Standard stock display section (Dense planting side display section)
106c Neutral display section 107 ₁ , 107 ₂ , 110 Transmission switching display board 107a Unequal speed rotation display section 107b Constant speed rotation display section

Claims (4)

A traveling machine body mounted with an engine, a planting work machine provided behind the traveling machine body for planting seedlings in a field, and an inter-strain transmission that shifts rotation from the engine and transmits it to the planting work machine. In the rice transplanter equipped with a transmission switching mechanism that changes the rotation of the engine to a constant speed rotation state or an inconstant speed rotation state and transmits it to the planting machine,
The inter-variety transmission includes a first transmission shaft, a second transmission shaft arranged in parallel with the first transmission shaft, and a sparse planting arranged at a predetermined interval from the first transmission shaft. A side gear set and a densely planted side gear group are arranged on the second transmission shaft and shifted in the axial direction of the second transmission shaft to select each of the sparsely planted side gear group and the densely planted side gear group. An inter-strain transmission gear that meshes with each other,
The predetermined interval constitutes a neutral position where the inter-strain transmission gear does not mesh with both the sparse planting side gear set and the dense planting side gear set, and interrupts power transmission between the engine and the planting work machine. Become
Rice transplanter characterized by that. The inter-company transmission includes a shifter that shifts the inter-company transmission gear, an inter-company transmission lever that operates the shifter, and a detent mechanism that positions the shifter.
The detent mechanism is formed by stopping and positioning the shifter at the neutral position.
The rice transplanter according to claim 1. A strain shift display plate for displaying the operation position of the strain shift lever is provided,
The inter-strain shift display plate is selectively connected to a sparsely planted inter-strain display unit that indicates a range in which the interstrained transmission gear selectively engages with each gear of the sparsely planted side gear set, and to each gear of the densely planted side gear group. The dense planting side inter-strain display unit indicating a meshing range, and the sparse planting side inter-strain display unit and the dense planting side inter-strain display unit, and a neutral display unit indicating the neutral position,
The rice transplanter according to claim 1 or 2. In the inter-strain shift display plate, the sparsely planted inter-strain display part and the densely planted side inter-strain display part are color-coded,
A transmission switching display plate for displaying the operation position of the operation lever of the transmission switching mechanism;
The transmission switching display plate includes a constant speed rotation display unit indicating a range in which the rotation of the engine is transmitted to the planting work machine in a constant speed rotation state, and the planting work in a state where the rotation of the engine is performed at a non-uniform speed rotation An inconstant speed rotation display unit indicating a range to be transmitted to the machine,
The constant speed rotation display part and the non-constant speed rotation display part are color-coded so as to correspond to the color-coded colors of the sparsely planted inter-strain display part and the densely planted side inter-strain display part of the inter-strain shift display plate. Become,
The rice transplanter according to claim 3.

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