JP2001327207A - Sulky rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To readily operate a traveling machine body from the ground and to easily stop the traveling machine body in a sulky rice transplanter. SOLUTION: An operation arm 15 for an operation on the ground is installed at the front part of the transferring machine body 3 so as to freely change the position of the operation arm from a standing position to a forward falling position and the operation arm is equipped with right and left base parts to be attached to the front part of the traveling machine body 3 and a transverse gripping part 15a at the top part to constitute the operation arm 15. The front part of the traveling machine body 3 is equipped with a main clutch lever 35, a main clutch can be disengaged and a brake can be operated to a braking side by the main clutch lever 35, the main clutch is disengaged by the main clutch lever 35 and the brake can be retained in an operation position worked in the braking side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a riding rice transplanter.

[0002]

2. Description of the Related Art In a riding rice transplanter, when a traveling machine is taken in and out of a field or unloaded on a truck bed or the like, the traveling machine may be tilted back and forth. It is desirable that the ship descends on the ground. As a means for responding to such a demand, as disclosed in, for example, JP-A-7-96839 or JP-A-7-96840, an auxiliary handle lever is attached to a pitman arm that steers a front wheel to perform ground work. Means have been proposed in which an operator forcibly operates a pitman arm by swinging an auxiliary handle lever at the front of the body.

[0003]

Since the riding rice transplanter uses the rear wheels as main propulsion wheels, when the traveling body is driven to climb uphill by advancing, the front part of the traveling body tends to float due to the propulsion reaction force,
The contact pressure of the front wheels may decrease, and the propulsive force of the front wheels may decrease. In this case, an operator on the ground pushes down the front part of the traveling body to suppress the lifting of the front part of the traveling body, but in the structure described in the related art, the auxiliary handle lever is attached to the pitman arm. So
Performing an operation such as pressing down the front part of the traveling aircraft with the force applied to the auxiliary handle lever may deform or damage the pitman arm. An object of the present invention is to provide a riding rice transplanter that can easily operate a traveling machine body from the ground.

[0004]

Means for Solving the Problems [Characteristics, actions and effects of the present invention] [Configuration] A characteristic of the present invention resides in a riding rice transplanter configured as follows. An operation arm for ground operation,
The operation arm is provided with a left and right base attached to the front of the traveling body and a lateral grip at the upper end, which is provided at the front of the traveling body so that the posture can be freely changed to a standing posture and a forwardly lying posture. In addition, a main clutch lever is provided at the front of the traveling body, and the main clutch lever can be operated to disengage the main clutch and the brake can be operated to the braking side. It is configured to be able to be held at the operating position operated on the side.

[Operation] [I] According to the feature of the first aspect, during a normal traveling in which the operator rides on the traveling body and drives, the operation arm is set to the standing posture. When moving the traveling machine in and out of the field and loading and unloading trucks on and off the truck, by setting the operation arm in the lying posture, applying force from above to the operating arm in the lying posture, Pressing of the front part can be performed.

[II] According to the feature of the first aspect, when a worker on the ground is operating the self-propelled traveling body by the operation arm, the front part of the traveling body can be operated without reaching the main clutch pedal. By operating the main clutch lever, the main clutch is disengaged and the brake is operated to the braking side, so that the traveling machine body can be easily stopped.

[Effect of the Invention] According to the feature of claim 1,
The operator on the ground can hold down the front part of the traveling body by the operation arm in the lying posture, so that the traveling body can be easily operated from the ground. According to the feature of claim 1, when the worker on the ground is operating the self-propelled traveling body by the operation arm in the lying posture, the traveling body can be easily stopped by the main clutch lever,
The traveling body did not move under its own weight even when it was tilted back and forth, and the handling was excellent.

[0008]

FIG. 1 shows a riding rice transplanter according to the present invention. This riding rice transplanter has a front wheel 1 and a rear wheel 2
A four-row seedling planting apparatus 5 is connected to a rear part of a four-wheel drive type traveling body 3 provided with a hydraulically driven link mechanism 4 in a vertically movable manner. As shown in FIGS. 1 and 7, an output shaft 7 of an engine 6 mounted on a front portion of the traveling body 3 and an input shaft 9 of a transmission case 8 supporting the front wheels 1 are interlocked via a belt transmission 10. Concatenated,
The gears are shifted by the transmission case 8 to drive the front wheels 1. The shifting power taken out of the transmission case 8
The shaft is transmitted to the rear transmission case 11 supporting the rear wheel 2, and the working power taken out of the transmission case 8 is transmitted to the seedling planting device 5.

As shown in FIGS. 4 and 5, a battery stand 13 supporting a battery 12 is provided at a lower portion of a front portion of the traveling body 3 and left and right of a guard frame 14 arranged so as to surround the lower portion of the battery stand 13. An operation arm 15 for ground operation is attached to the outer side surface so as to swing back and forth. The operation arm 15 is formed by bending a round pipe material so as to expand downward. Bolts 16 are used so that the left and right bases of the operation arm 15 can swing up and down around the fulcrum a on the left and right sides of the guard frame 14. Are linked. By appropriately tightening the bolts 16, an appropriate friction resistance that does not cause the operation arm 15 to arbitrarily swing is given, and the operation arm 15 can be manually oscillated, and the operation arm 15 is frictionally held in the upright posture. be able to.

As shown in FIGS. 4 and 5, stoppers 17 are fixed to the left and right sides of the guard frame 14 by welding. As shown by solid lines in FIG. The contact with the front end prevents the operation arm 15 from swinging rearward beyond the standing posture. As shown by the two-dot chain line in FIG. 4, the left and right bases of the operation arm 15 abut against the lower surface of the stopper 17, thereby preventing the operation arm 15 from swinging forward beyond the forward lying posture. Is done. In the standing posture as shown in FIGS. 1 and 2, the operating arm 15 is in a substantially vertical standing posture, and in the forward lying posture as shown in FIG. 6, the operating arm 15 is raised forward at an angle of several tens degrees. The posture is inclined like a circle.

As shown in FIGS. 2 and 3, in order to easily push down or pull forward the operation arm 15 in the lying position, the operation arm 15 has an appropriate width in a lateral direction enough to be gripped sideways. The grip 15a is configured. As shown in FIGS. 1, 2, and 3, a center mascot 18 as an aiming tool indicating the left and right centers of the traveling body 3 is provided near the tip of the operation arm 15 so as to be able to swing up and down around a fulcrum b. I have.

As shown in FIG. 7, the belt transmission 10
The belts 23a, 23b are attached to two sets of pulleys 22a, 22b having different transmission ratios attached to the output shaft 7 and the input shaft 9.
And a double-tension speed change function configured to perform high-low two-stage speed change by selecting and operating one of the tension rollers 24a, 24b acting on the belts 23a, 23b. The arms 25a, 25b of the tension rollers 24a, 24b
6 (see FIGS. 1 and 3) is linked to a sub-transmission lever 27 disposed on the left side of the vehicle 6 via two sets of link mechanisms 28a and 28b. As shown in FIG. 1, a main transmission lever 29 for operating a gear transmission (not shown) of the transmission case 8 is provided at the center front of the operation step 30.

As shown in FIG. 7, the tension rollers 24a and 24b that perform two-speed shifting are configured to function as the main clutch 31. As shown in FIGS. 3 and 7, a contact portion 33 is provided on a pedal arm 32a of a main clutch pedal 32 disposed at a front left portion of an operation step 30, and an arm 2 of the tension rollers 24a and 24b is provided.
The base ends of 5a, 25b are arranged so as to face the contact portion 33. When the main clutch pedal 32 is depressed, the tension rollers 24a, 24b are operated to the clutch disengagement side, and the engine 6 A tension clutch type main clutch 31 for interrupting transmission to the transmission case 8 is configured.

As shown in FIGS. 7, 8, and 9, a main clutch lever 35 and a brake arm 36 extending forward of the traveling body 3 are loosely supported on a fulcrum shaft 34 of the pedal arm 32a. Main clutch lever 3
5 is urged by the torsion springs 37 and 38 to the upper return position. The main clutch lever 35 is the pedal arm 3
2a is arranged to cross from above, and when the main clutch lever 35 is pressed down, the pedal arm 3
The main clutch 31 is disengaged by the push-down operation of the main clutch pedal 32a due to a partial hit from above, and the main clutch pedal 32
, The main clutch lever 35 is left at the return position.

As shown in FIGS. 7, 8, 9 and 10, a brake piece 42 is provided at the distal end of the brake arm 36 to press the belt winding groove of one pulley 22a on the driven side of the belt transmission 10. The main clutch lever 35 and the brake arm 36 are interlockingly connected with elastic flexibility through a rod 44 on which a compression spring 43 is fitted. As a result, the brake piece 42 is elastically pressed by the pulley 22a in accordance with the operation of pushing down the main clutch lever 35 to disengage the main clutch 31, and the lower transmission of the disengaged main clutch 31 is performed. A brake 41 for braking the system is configured.

As shown in FIGS. 3 and 8, at the front left side of the operation step 30, a locking lever 45 which engages with the latch 32b of the main clutch pedal 32 which is depressed is provided.
The main clutch pedal 3 which is swingably movable back and forth around the fulcrum c and is urged forward to return, and is depressed.
2 can be locked and 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 disengaged and the brake 41 is operated to the braking side.

As shown in FIGS. 1, 2 and 3, a reserve seedling rest 52 is provided on the front left and right sides of the traveling machine body 3 with a passage 51 for getting on and off the side of the engine bonnet 50. Are located. The spare seedling rest 52 is provided with a support 54 formed in an arch shape on a support 55 of the traveling machine body 3,
4 is provided with a plurality of stages of seedling resting plates 56 in an outward cantilever shape, so that the entire stand 52 for the spare seedlings can be rotated rearward around the rear strut 54b of the strut 54.

As shown in FIGS. 2 and 11, the rear support 5
4b is a vertical axis d of a rear support shaft 57 provided on the support base 55.
It is rotatably fitted around and is supported by a set bolt 58 to prevent it from falling off. The lower part of the front support column 54a is opposed to the upper end of the front support shaft 59 provided on the support base 55 in a state where it is opposed. Are linked. As shown in FIGS. 11 and 12, a U-shaped positioning metal fitting 6 having a cross section open toward the inside of the traveling vehicle body 3 is provided below the front support column 54 a.
0 is provided so as to protrude downward, and the positioning bracket 60 is fitted to the front support shaft 59 from the lateral outer side, so that the front support shaft 5 is provided.
9 and the front support 54a are positioned concentrically and butted up and down.

As shown in FIGS. 11 and 12, a positioning bracket 60 is rotatable via a support shaft 61 and a lever 62.
Is provided with a latch 63 that can be rotated by
With the front support shaft 59 and the front support column 54a positioned concentrically and butted up and down, the latch 63 is locked to the back of the front support shaft 59, so that the front support 54
It is configured to prevent a from separating from the front support shaft 59 laterally and outward. By operating the lever 62 in the reverse direction to remove the latch 63 from the front support shaft 59, as shown by the two-dot chain line in FIG. 6 and FIG. The vehicle can be rotated rearward by about 180 °, so that the left side of the front part of the traveling body 3, that is, around the main clutch lever 35, can be easily opened to make it easy to operate.

As shown in FIGS. 2 and 11, the rear support 5
A bracket 66 supporting a support arm 65 of a seedling marker 64 used when the traveling machine body 3 travels along a row of seedlings previously planted is provided at a lower portion of 4b. A stopper 67 is provided on the rear support shaft 57, and as described above, the entire stand 52 for the preliminary seedling is moved backward by about 180 °.
When rotated, the bracket 66 comes into contact with the stopper 67, and further rotation of the stand 52 for the spare seedling is prevented.

As shown in FIGS. 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 is inserted into the locking hole 68 on the inner surface of the positioning bracket 60.
When the front support 54a is butt-connected to the front support shaft 59, the front support 54a is prevented from coming off in the vertical direction with respect to the front support shaft 59.

The riding rice transplanter according to the present invention is configured as described above. When a worker is in a normal work running while riding on the driver's seat 26, as shown by solid lines in FIGS. Then, the operation arm 15 is set to the standing posture, and the center mascot 18 is standing. In this case, even if the main clutch 31 is depressed to operate the main clutch 31, the brake 41 is not operated to the braking side because the main clutch lever 35 remains.

When the traveling body 3 is taken in and out of the field or unloaded on a truck bed or the like, the traveling body 3 is inclined forward and backward, and when it is difficult for an operator to ride on the driver's seat 26 and drive. In this case, the operator descends on the ground and operates the vehicle while moving the traveling body 3 at a low speed, and as shown in FIG. 6, the operation arm 15 is set to the lying posture, and the operation arm 15 is operated left and right. To correct the direction of the traveling body 3. In this case, for example, as shown in FIG. 13, the front part of the traveling body 3 may be slightly lifted due to the propulsion reaction force when the vehicle advances forward on the upward slope. 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 body 3 is difficult to climb due to poor scaffolding, the operation arm 15 can be pulled forward to assist the traveling body 3 in ascending.

When the operator stops the traveling machine body 3 while operating on the ground, when the main clutch lever 35 is pressed down, the main clutch 31 is disengaged, the brake 41 is operated to the braking side, and the vehicle is driven. Airframe 3 stops immediately. When it is desired to maintain the stopped state of the traveling body 3, the main clutch lever 32 may be held at the operating position where the main clutch lever 32 is pressed down by using the locking lever 45.

As shown in FIG. 14, when the traveling body 3 is loaded on the truck bed 70, the operation arm 15 in the lying posture is brought into contact with the rear frame 71 of the truck cab due to a delay in the disengagement operation of the main clutch 31. Even if this happens, the operating arm 15 is allowed to swing upward in a posture inclined forward and upward, so that the operating arm 15 can be easily swung upward by the reaction force from the rear frame 71. Move.

[Another Embodiment of the Invention] The present invention can also be carried out in the following modes. As shown in FIG. 15, a plurality of locking holes 73 are provided around a fulcrum a of the guard frame 14 that supports the operation arm 15, and a connection pin 74 that is detachably attached to the base end 15 b of the operation arm 15 is By selectively inserting the operation arm 15 into any of the locking holes 73, the operation arm 15 can be configured and implemented so as to be fixed in a plurality of postures between the standing posture and the falling posture.

As shown in FIG. 16, the pedal arm 3
The main clutch lever 35 is directly connected to the main clutch pedal 32a, and the main clutch pedal 32a and the brake arm 36 are connected to the compression spring 4a.
3 and the rod 44 may be linked. in this case,
By depressing the main clutch pedal 32, the brake 41 is operated to the braking side.

A side brake (not shown) for the left and right rear wheels 2 operated by left and right side brake pedals 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 portion of the traveling body.

FIG. 3 is a plan view of a front portion of the traveling body.

FIG. 4 is a side view of the vicinity of a mounting portion of the operation arm.

FIG. 5 is a front view of the vicinity of a mounting portion of the operation arm.

FIG. 6 is a side view showing the front portion of the traveling machine body in a state where the operation arm is set to the lying posture and the entire stand for the spare seedling is rotated backward by about 180 °.

FIG. 7 is a side view of the vicinity of the belt transmission.

FIG. 8 is a side view showing the vicinity of the brake;

FIG. 9 is a plan view near a brake;

FIG. 10 is a front view showing the vicinity of a brake;

FIG. 11 is a longitudinal side view showing the vicinity of the front and rear struts of the reserve seedling rest.

FIG. 12 is a cross-sectional plan view showing a fixing structure of a front support of a preliminary seedling rest.

FIG. 13 is a schematic side view showing an example of a usage pattern.

FIG. 14 is a schematic side view showing another example of a use mode.

FIG. 15 is a side view showing the vicinity of a mounting portion of an operation arm according to another embodiment of the invention.

FIG. 16 is a side view showing the vicinity of a main clutch lever and a brake according to another embodiment of the invention.

[Explanation of symbols]

 3 Traveling body 15 Operation arm 15a Side grip 31 Main clutch 35 Main clutch lever 41 Brake

Continued on the front page (72) Inventor Hiroyuki Miki 64 Ishizukita-cho, Sakai City, Osaka Prefecture, in Kubota Sakai Works, Ltd. Inventor Tsuyoshi Inoue 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Inside Kubota Sakai Works

Claims (2)

[Claims] An operation arm for ground operation is provided at a front portion of a traveling body so as to be capable of changing its posture to a standing posture and a forward falling posture, and left and right bases attached to the front portion of the traveling body, and an upper end portion. And a main grip lever at a front portion of the traveling body, wherein the main clutch lever allows the main clutch to be operated and the brake to be operated to the braking side. A riding rice transplanter configured to hold the main clutch lever at an operating position where the main clutch is disengaged and the brake is operated to the braking side. 2. The riding rice transplanter according to claim 1, wherein the operation arm is positioned below the upper end of the main clutch lever in the falling posture of the operation arm.