JP3616063B2 - Passenger rice transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a riding rice transplanter.
[0002]
[Prior art]
In riding rice transplanters, the traveling machine body may tilt forward and backward when the traveling machine body is put in and out of the field or loaded onto the truck bed, etc. It is desirable.
As means for responding to such a demand, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-96839 or Japanese Patent Application Laid-Open No. 7-96840, an auxiliary handle lever is attached to a pitman arm that steers the front wheel, and work on the ground Means for forcibly operating the pitman arm by a person swinging the auxiliary handle lever in front of the traveling machine body has been proposed.
[0003]
[Problems to be solved by the invention]
According to the structure described in the prior art, the operator can control the loading and unloading of the traveling machine body to and from the field and the loading and unloading of the traveling machine body to the truck bed and the like from the ground.
In a passenger rice transplanter, when the traveling machine is traveling uphill, the front part of the traveling machine may be lifted by the propulsion reaction force, and the ground contact pressure of the front wheels may be reduced, and the propulsive force by the front wheels may be reduced. In this case, an operator on the ground presses down the front part of the traveling machine body to suppress the lifting of the front part of the traveling machine body, but in the structure described in the prior art, the auxiliary handle lever is attached to the pitman arm. Therefore, if the operation of pushing down the front part of the traveling machine body with the force applied to the auxiliary handle lever is performed, there is a risk that the pitman arm may be deformed or damaged.
An object of the present invention is to provide a riding rice transplanter capable of easily maneuvering a traveling machine body from the ground.
[0004]
[Means for Solving the Problems]
[Constitution]
In a riding rice transplanter in which a seedling planting device is connected to a rear portion of a traveling machine body including a steering handle via a link mechanism so as to be movable up and down,
An operation arm disposed at the center of the left and right of the front part of the traveling machine body is pivotally supported so that it can swing up and down around the fulcrum of the left and right horizontal axis of the base part, and an upright position standing at the front part of the traveling machine body and The tip end portion of the operation arm is provided so as to be switchable from the standing position to a lying position in which the tip end of the operation arm swings forward and downward around the fulcrum .
From the ground, the operation arm is brought into contact with the operation arm at the lying position where the posture is changed from the standing position around the fulcrum to the lying position where the tip is swung forward and downward. A stopper that prevents the operating arm from swinging downward against a forward downward press is provided on the traveling machine body, and the operating arm is pressed downward while the operating arm is in contact with the stopper. Push down the front of the aircraft through the operation arm,
A main clutch lever and a main clutch pedal are provided at the front part of the traveling machine body, and the main clutch lever can be operated to be disengaged by the main clutch lever and the brake can be operated to the braking side.
The main clutch can be disengaged by depressing the main clutch pedal, and the brake can be operated to the braking side.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a riding rice transplanter according to the present invention. In this riding rice transplanter, a four-row planting planting device 5 can be moved up and down via a hydraulically driven link mechanism 4 at the rear of a four-wheel drive type traveling machine body 3 having a front wheel 1 and a rear wheel 2. Are connected to each other. As shown in FIGS. 1 and 7, the output shaft 7 of the engine 6 mounted on the front portion of the traveling machine body 3 and the input shaft 9 of the transmission case 8 that supports the front wheels 1 are linked via a belt transmission 10. The front wheels 1 are driven by being connected and gear-shifted by the transmission case 8. The power extracted from the mission case 8 is transmitted to the rear transmission case 11 that pivotally supports the rear wheel 2, and the working power extracted from the mission case 8 is transmitted to the seedling planting device 5.
[0006]
As shown in FIGS. 4 and 5, a battery base 13 that supports the battery 12 is provided at the front lower part of the traveling machine body 3, and is provided on the left and right outer surfaces of the guard frame 14 arranged so as to surround the lower part of the battery base 13. An operation arm 15 for ground control is attached so that it can swing up and down. The operation arm 15 is formed by bending a round pipe material downward, and the left and right bases of the operation arm 15 can be swung up and down around the fulcrum a on the left and right side portions of the guard frame 14 with bolts 16. It is connected. By appropriately tightening the bolt 16, an appropriate frictional resistance that prevents the operation arm 15 from freely swinging is provided, and the operation arm 15 can be arbitrarily swinged manually, and the operation arm 15 is frictionally held in the standing position. be able to.
[0007]
As shown in FIGS. 4 and 5, the stopper 17 is fixed to the left and right lateral sides of the guard frame 14 by welding, and the left and right bases of the operating arm 15 are in contact with the front end of the stopper 17 as shown by the solid line in FIG. 4. By hitting, the operating arm 15 is prevented from swinging backward beyond the standing position. As shown by the two-dot chain line in FIG. 4, the left and right bases of the operation arm 15 are in contact with the lower surface of the stopper 17 to prevent the operation arm 15 from swinging forward beyond the forward lying position. Is done. As shown in FIGS. 1 and 2, the operating arm 15 stands in a substantially vertical position in the standing position, and the operating arm 15 rises forward at an angle of several tens of degrees in the forward lying position as shown in FIG. The posture is inclined to the shape.
[0008]
As shown in FIGS. 2 and 3, a lateral gripping portion 15 a having an appropriate width sufficient to allow the tip of the operating arm 15 to be gripped sideways so that the operating arm 15 in the lying position can be pushed down and pulled forward easily. It is configured. As shown in FIGS. 1, 2, and 3, a center mascot 18 as a sighting tool indicating the center of the left and right of the traveling machine body 3 is provided near the tip of the operation arm 15 so as to swing up and down around the fulcrum b. Yes.
[0009]
As shown in FIG. 7, the belt transmission device 10 winds belts 23 a and 23 b around two sets of pulleys 22 a and 22 b attached to the output shaft 7 and the input shaft 9 and having different transmission ratios, and acts on the belts 23 a and 23 b. It is provided with a double-tension type speed change function configured to perform two-step shift by selecting and acting one of the tension rollers 24a and 24b. The arms 25a and 25b of the tension rollers 24a and 24b are linked to the auxiliary transmission lever 27 arranged on the left side of the driver seat 26 (see FIGS. 1 and 3) via two sets of link mechanisms 28a and 28b. ing. As shown in FIG. 1, a main transmission lever 29 for operating a gear transmission (not shown) of the mission case 8 is provided at the center front of the operation step 30.
[0010]
As shown in FIG. 7, tension rollers 24 a and 24 b that perform a two-step shift in height are configured to function as a main clutch 31. As shown in FIG. 3 and FIG. 7, a contact portion 33 is provided on the pedal arm 32a of the main clutch pedal 32 disposed at the left front portion of the operation step 30, and the bases of the arms 25a and 25b of the tension rollers 24a and 24b are provided. The end portion is disposed so as to face the contact portion 33. By depressing the main clutch pedal 32, the tension rollers 24a and 24b are operated to the clutch disengagement side, and the engine 6 is connected to the transmission case 8. A tension clutch type main clutch 31 that cuts off transmission is configured.
[0011]
As shown in FIGS. 7, 8, and 9, a main clutch lever 35 and a brake arm 36 heading forward of the traveling machine body 3 are loosely supported on the fulcrum shaft 34 of the pedal arm 32a, and the pedal arm 32a and the main clutch lever are supported. 35 is biased to the upper return position by the torsion springs 37 and 38. The main clutch lever 35 is disposed so as to intersect the pedal arm 32a from above. When the main clutch lever 35 is pushed down, the pedal arm 32a is pushed down by a single contact from above and the main clutch 31 is cut off. When the main clutch pedal 32 is depressed, the main clutch lever 35 remains in the return position.
[0012]
As shown in FIGS. 7, 8, 9, and 10, a brake piece 42 that presses against the belt winding groove of one pulley 22 a on the driven side of the belt transmission device 10 is provided at the tip of the brake arm 36. The main clutch lever 35 and the brake arm 36 are coupled to each other with elastic flexibility through a rod 44 with a compression spring 43 fitted thereto. Thus, as the main clutch lever 35 is pushed down to disengage the main clutch 31, the brake piece 42 is elastically pressed by the pulley 22a, and the transmission on the lower side of the disengaged main clutch 31 is performed. A brake 41 for braking the system is configured.
[0013]
As shown in FIGS. 3 and 8, at the front left side of the operation step 30, a locking lever 45 that engages with the hanging bracket 32b of the main clutch pedal 32 that has been depressed is freely swingable back and forth around the fulcrum c. The main clutch pedal 32 that has been pushed forward and disposed and can be locked is held by the locking lever 45. The locking pin 35a of the main clutch lever 35 is locked by the locking lever 45, and the main clutch lever 35 can be held at the operating position where the main clutch 31 is operated to be disconnected and the brake 41 is operated to the braking side.
[0014]
As shown in FIGS. 1, 2, and 3, a reserve seedling stand 52 is disposed on the left and right lateral sides of the front portion of the traveling machine body 3 with a passage 51 for getting on and off the lateral side of the engine bonnet 50. Yes. The preliminary seedling setting table 52 includes an arch-shaped support 54 formed on the support base 55 of the traveling machine body 3 and a plurality of seedling setting plates 56 provided on the support 54 in an outward cantilever shape. The entire preliminary seedling raising table 52 can be rotated rearward around the rear column 54 b of the column 54.
[0015]
As shown in FIGS. 2 and 11, the rear column 54 b is rotatably fitted around the longitudinal axis d of the rear support shaft 57 provided on the support base 55, and is supported by the set bolt 58 to prevent it from coming off. The lower part of the front support column 54 a is connected in a state of being opposed to and opposed to the upper end of the front support shaft 59 provided in the support base 55. As shown in FIGS. 11 and 12, a positioning fitting 60 having a U-shaped cross section that is open toward the inside of the traveling machine body 3 is provided at the lower portion of the front column 54a so as to protrude downward. By fitting the front support shaft 59 from the lateral outer side, the front support shaft 59 and the front support column 54a are positioned concentrically and abutted vertically.
[0016]
As shown in FIGS. 11 and 12, the positioning bracket 60 is provided with a hanging bracket 63 that can be rotated via a support shaft 61 and can be rotated by a lever 62, and a front support shaft 59 and a front portion are provided. In the state where the support post 54a is positioned concentrically and abutted vertically, the hook 63 is locked to the back portion of the front support shaft 59, so that the front support post 54a is laterally separated from the front support shaft 59. It is configured to prevent it from leaving. By operating the lever 62 in the reverse direction and detaching the latch 63 from the front support shaft 59, as shown by the two-dot chain line in FIG. 6 and FIG. It can be rotated about 180 [deg.] Rearwardly, and thereby, a left side of the front portion of the traveling machine body 3, that is, a state around the main clutch lever 35 can be greatly opened to be easily operated.
[0017]
As shown in FIGS. 2 and 11, a bracket 66 that supports a support arm 65 of a seedling marker 64 used when the traveling machine body 3 travels along a row of seedlings previously planted at the lower portion of the rear column 54 b. Is provided. The rear support shaft 57 is provided with a stopper 67. As described above, when the entire seedling seedling base 52 is rotated about 180 ° rearward, the bracket 66 comes into contact with the stopper 67 and further reserves are provided. The rotation of the seedling table 52 is prevented.
[0018]
11 and 12, a locking hole 68 is provided on the lateral outer surface of the front support shaft 59, and a positioning pin 69 to be inserted into the locking hole 68 is provided on the inner surface of the positioning fitting 60. In the state where the front support column 54 a is abutted against and connected to the front support shaft 59, the front support column 54 a is prevented from coming off in the vertical direction with respect to the front support shaft 59.
[0019]
The riding rice transplanter according to the present invention is configured as described above, and during normal traveling in which an operator gets on the driver's seat 26 and operates, as shown by the solid lines in FIGS. Is set to the standing position, and the center mascot 18 is raised. In this case, even if the main clutch pedal 32 is depressed and the main clutch 31 is turned off, the main clutch lever 35 remains, so the brake 41 is not operated to the braking side.
[0020]
When the traveling machine body 3 is put in and out of the field or loaded onto a truck bed or the like, the traveling machine body 3 tilts back and forth, and it is difficult for the operator to get on the driver's seat 26 to drive the traveling machine body. As shown in FIG. 6, the operating arm 15 is set to the lying down position, and the operating arm 15 is operated left and right to operate the traveling aircraft. Correct the direction of 3. In this case, for example, as shown in FIG. 13, the front part of the traveling machine body 3 may be lifted by the propulsion reaction force when moving forward with a forward rising inclination. In such a state, the operation arm 15 is pushed down. By doing so, the lifting of the front part of the traveling machine body 3 can be suppressed. When the traveling machine body 3 is difficult to climb due to poor scaffolding, it is possible to assist the climbing of the traveling machine body 3 by pulling the operation arm 15 forward.
[0021]
When the traveling machine body 3 is stopped during the maneuvering of the operator getting down to the ground, if the main clutch lever 35 is pushed down, the main clutch 31 is disengaged, the brake 41 is operated to the braking side, and the traveling machine body 3 is Stop immediately. In order to maintain the stopped state of the traveling machine body 3, the main clutch lever 32 may be held at the operating position where the main clutch lever 32 is pushed down using the locking lever 45.
[0022]
As shown in FIG. 14, when the traveling machine body 3 is loaded on the truck bed 70, the operation arm 15 in the lying position is applied to the rear frame 71 of the truck cab due to a delay in the disconnection operation of the main clutch 31. Even if this occurs, the operation arm 15 is allowed to swing upward in a posture inclined upward, so that the operation arm 15 swings upward without difficulty by the reaction force from the rear frame 71.
[0023]
[Another Embodiment of the Invention]
The present invention can also be implemented in the following forms.
As shown in FIG. 15, the main clutch lever 35 may be directly connected to the pedal arm 32 a, and the main clutch pedal 32 a and the brake arm 36 may be linked via a compression spring 43 and a rod 44. In this case, when the main clutch pedal 32 is depressed, the brake 41 is operated to the braking side.
[0024]
A side brake (not shown) for the left and right rear wheels 2 operated by the left and right side brake pedals 72 arranged on the right side of the driving step 30 is used as a brake operated by the main clutch lever 35 to the braking side. You can also.
[Brief description of the drawings]
FIG. 1 is an overall side view of a riding rice transplanter. FIG. 2 is a perspective view of a front part of a traveling machine body. FIG. 3 is a plan view of a front part of the traveling machine body. FIG. 5 is a front view of the vicinity of the operating arm mounting portion. FIG. 6 is a front view of the traveling machine body when the operating arm is set to the lying down position and the entire reserve seedling table is rotated about 180 ° rearward. Fig. 7 is a side view of the vicinity of the belt transmission device. Fig. 8 is a side view of the vicinity of the brake. Fig. 9 is a plan view of the vicinity of the brake. Fig. 10 is a front view of the vicinity of the brake. ] Vertical side view showing the vicinity of the front and rear struts of the reserve seedling stand [Fig. 12] Cross sectional plan view showing the fixing structure of the front struts of the reserve seedling stand [Fig. 13] Schematic side view showing an example of usage Figure 14 is a main in another embodiment of a schematic side view showing another example of a usage pattern [15] invention clutch Side view of the vicinity of the bars and the brake [Description of symbols]
3 traveling machine body 15 operation arm
17 Stopper 31 Main clutch 32 Main clutch pedal 35 Main clutch lever 41 Brake

Claims (2)

In a riding rice transplanter in which a seedling planting device (5) is connected to a rear portion of a traveling machine body (3) having a steering handle via a link mechanism (4) so as to be movable up and down.
An operating arm (15) disposed at the center of the left and right of the front part of the traveling machine body (3) is pivotally supported so as to swing up and down around the fulcrum (a) of the left and right horizontal axes of the base part. (3) The standing position stood up at the front portion and the tip end portion of the operation arm (15) from the standing position can be switched to the lying down position swinging forward and downward around the fulcrum (a) .
From the ground, the operating arm (15) is contacted with the operating arm (15) at the lying position where the posture of the operating arm (15) is changed from the standing position around the fulcrum (a) to the lying position where the tip is swung forward and downward. The traveling machine body (3) is provided with a stopper (17) that prevents the operating arm (15) from swinging downward against the downward pressing of the operating arm (15) from this position. 15) is in contact with the stopper (17), by pressing the operating arm (15) downward, the front part of the traveling machine body (3) is pushed down via the operating arm (15),
A main clutch lever (35) and a main clutch pedal (32) are provided at the front of the traveling machine body (3), and the main clutch lever (35) can be operated to be disengaged and the brake (41) is braked. Configured to be operable on the side,
A riding rice transplanter configured such that the main clutch (31) can be disengaged and the brake (41) can be operated to the braking side by depressing the main clutch pedal (32). The riding rice transplanter according to claim 1, wherein the main clutch lever (35) is configured to be held in an operating position in which the main clutch (31) is disengaged and the brake (41) is operated to the braking side. .

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