JP4634597B2 - Paddy field machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paddy field machine such as a rice transplanter, and more particularly to a paddle type self-propelled main machine provided with an operation tool.
[0002]
[Prior art]
[0003]
When the operation tool is operated, the paddy field work machine is in a relatively unstable posture, so that the dredging may be required to stop. Therefore, conventionally, as seen in Japanese Patent Application Laid-Open No. 2000-37119, on the side of the prime mover, an operation arm is provided for related operation of a clutch for intermittently transmitting power to the running unit and a brake for the running system. An operator operating the operation tool operates the operation arm to cut off the transmission to the traveling unit and brake the traveling.
[0004]
[0005]
[0006]
[Problems to be solved by the invention]
However, the conventional technique has the following drawbacks.
[0007]
[0008]
When an operating arm is provided on the side of the prime mover so that an operator operating the operating tool can stop traveling, the operator operating the grip of the operating tool and the operating arm However, even if it is not possible to operate, there is still room for improvement in terms of operability, forcing the operator to have a considerably unreasonable posture.
[0009]
[0010]
[0011]
An object of the present invention is to eliminate the above-mentioned conventional drawbacks.
[0012]
[Means for Solving the Problems]
The features / actions / effects of the paddy field working machine according to the present invention according to claim 1 are as follows.
[0013]
[Characteristic]
A paddy field work device is connected to the rear part of the riding type self-propelled machine, and includes a clutch for intermittently transmitting power to the traveling part, a brake for the traveling system, and a pedal that can operate the clutch or the clutch and brake freely. . An operation tool that can be operated from the front of the left and right center of the self-propelled machine is provided at the front of the self-propelled machine, and an operation tool that can be operated from the front of the self-propelled machine is provided at the front of the self-propelled machine. One auxiliary operation tool that can operate both the clutch and the brake is provided in the operation tool. The auxiliary operation tool can be swung up and down with the operator holding the grip of the tip of the operation tool in front of the self-propelled machine. Supports swingable. The pedal and the auxiliary operating tool are configured so as not to interfere with each other, and the operating tool is configured to prevent the steering of the front wheels.
[0014]
[0015]
[0016]
[0017]
[0018]
[0019]
[0020]
[0021]
[0022]
[Action]
[0023]
Since the auxiliary operation tool is provided on the operation tool so that the clutch and brake can be operated by this auxiliary operation tool, the auxiliary operation tool is positioned in the vicinity of the operator who operates the operation tool, so that transmission to the traveling unit is performed. When the operator who operates the operation tool operates the auxiliary operation tool to stop traveling in the state of being refused, the worker is not forced to take an unreasonable posture.
[0024]
In addition, since the pedal and the auxiliary operation tool do not interfere with each other, the auxiliary operation tool can be operated without depressing the clutch / brake against the urging force when the auxiliary operation tool is operated to stop traveling. While the above operation can be performed lightly, the auxiliary operation tool is not unnecessarily activated when the vehicle is stopped by depressing the pedal.
[0025]
[effect]
Therefore, both the travel stop by the boarding worker and the travel stop by the operator operating the operation tool can be performed with good operability, and the travel stop by operating the auxiliary operation tool is particularly easy and light. Can now be done.
[0026]
According to a second aspect of the present invention, there is provided a paddy field machine according to the first aspect of the present invention, wherein the auxiliary operation tool includes the left and right leg portions attached to the left and right support portions of the operation tool, and the end portions of the left and right leg portions. It is formed in a U-shape with a left and right grip operating collar for connecting the two.
According to a third aspect of the present invention, there is provided a paddy field work machine according to the first or second aspect , further comprising an adjusting means for adjusting the posture of the operation tool.
The paddy work machine according to a fourth aspect of the present invention is characterized in that, in the third aspect , the operation tool is configured to be freely changeable between a retracted posture and an action posture protruding forward, and the action posture of the operation tool is adjusted. The adjusting means is configured as described above.
[0027]
[0028]
[0029]
[0030]
[0031]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
As shown in FIGS. 1 and 2, a rice transplanter as an example of a paddy field work machine lifts a seedling planting device 3 as an example of a paddy field work device via a four-link mechanism 2 at the rear of the self-propelled main machine 1. A lift cylinder 4 using a hydraulic cylinder is provided, which is connected freely and raises the seedling planting device 3 with pressure oil supply and lowers the seedling planting device 3 with its own weight with oil discharge.
[0032]
The self-propelled machine 1 has a driving unit 5 mounted on the front and a driver seat 6 mounted on the rear, and includes a pair of left and right driving front wheels 7 and a pair of left and right driving rear wheels 8. ing. A steering handle 9 for steering the front drive wheel 7 is disposed in front of the driver seat 6.
[0033]
As shown in FIGS. 3 and 4, the driving unit 5 is a hydrostatic continuously variable steplessly switchable forward / backward driven neutrally driven by an engine 10 and a belt tension type main clutch C. A transmission 11 and a transmission case 12 for transmitting the output from the transmission 11 and the seedling planting device 3 are provided. As shown in FIGS. 5 and 6, the transmission case 12 includes a brake B having a transmission gear to the traveling unit as a brake disk.
[0034]
The main clutch C wraps a transmission belt 15 over an output pulley 13 attached to the output shaft 10a of the engine 10 in an integrally rotated state and an input pulley 14 attached to the input shaft 11a of the continuously variable transmission 11 in an integrally rotated state. There is provided a tension arm 16 that can swing and switch between a clutch engagement posture that presses the transmission belt 15 to bring it into a transmission state and a clutch disengagement posture that releases the pressure and puts the transmission belt 15 in a non-transmission state. A coil spring 17 that swings and urges 16 to a clutch-engaged posture is provided.
[0035]
As shown in FIG. 5 and FIG. 6, the foot of the driver seat 6 has a main clutch that operates to depress the main clutch C and brake the brake B by being depressed against the urging force. A brake pedal 18 is disposed, and a main transmission lever 19 for operating the continuously variable transmission 11 is disposed on the side of the steering handle 9 as shown in FIGS.
[0036]
The means for linking the tension arm 16 to the main clutch / brake pedal 18 so that the main clutch C is disengaged when the main clutch / brake pedal 18 is depressed is, as shown in FIG. The other end portion of the support shaft 20 bent as the arm 16 is bent as a first operated arm 21, and a first operating arm 22 that swings integrally with the main clutch / brake pedal 18 is provided. The first operating rod 24 is provided to cause the first operated arm 21 to be pressed and swung to the clutch disengagement side via a rubber-made vibration isolator 23 by rocking accompanying the depression of the main clutch / brake pedal 18. Has been. As described above, when the main clutch C is disengaged by depressing the main clutch / brake pedal 18, the first operating arm 21 is pressed by the first operating rod 24. When the arm 16 is cut and operated, the cutting operation of the tension arm 16 is prevented from being transmitted to the first operating rod 24, and the main clutch / brake pedal 18 is operated against the return urging force by the spring 26 on the depression side. This is to prevent this. In other words, this is to prevent the biasing force of the spring 26 that restores and biases the main clutch / brake pedal 18 from acting as an operating resistance when the auxiliary operating tool 25 is operated to disengage the main clutch C.
The first operating arm 24 is pressed by the first operating rod 24 through the vibration isolator 23 because the vibration of the tension arm 16 in the state where the main clutch C is engaged and operated is applied to the main clutch / brake pedal 18. This is to prevent the main clutch / brake pedal 18 from vibrating.
[0037]
The means for linking the second operated arm 27 of the brake B to the main clutch / brake pedal 18 so that the brake B is braked by the depression of the main clutch / brake pedal 18, as shown in FIG. A second operating arm 28 that swings integrally with the main clutch / brake pedal 18 is provided, and the second operation arm 28 is operated to swing the nut 29a when the main clutch / brake pedal 18 is depressed. A second operating rod 29 that swings the second operated arm 27 to the braking side by being pressed and pulled by the arm 28 is provided. As described above, when the brake B is braked by depressing the main clutch / brake pedal 18, the second operating arm 28 presses the contact 29a of the second operating rod 29 with the auxiliary operating tool 25. When the operated arm 27 is swung to the braking side, the movement of the second operating rod 29 accompanying the swinging of the second operated arm 28 to the braking side is prevented from being transmitted to the second operating arm 28. This is to prevent the main clutch / brake pedal 18 from operating against the return urging force of the spring 26 toward the depressed side. In other words, the urging force of the spring 26 is prevented from acting as an operating resistance when the brake B is braked by the auxiliary operation tool 25.
[0038]
And in the front part of the self-propelled main machine 1, that is, the front part of the engine mounting frame 30, as shown in FIGS. The operating tool 33 is configured to be swingably switched around a left-right axis p between an action posture protruding forward and a stowed storage posture. It is mounted with its center aligned with the left and right center of the self-propelled machine 1.
[0039]
The operation tool 33 is mainly used to restrain the front part of the self-propelled main machine 1 to prevent the front part of the self-propelled main machine 1 from being lifted up when over the ridge or when loading / unloading the truck bed via the step board. The lower end of the support 31 is brought into contact with the stopper 34 fixed to the engine mounting frame 30 to swing downward beyond the operating posture and to the rear beyond the standing posture. Oscillation is prevented. In addition, the swinging operation is permitted by the frictional force of the disc spring 35 interposed between the head 31 b of the bolt B for swingably mounting the one column 31 to the engine mounting frame 30. It is comprised so that a rocking posture may be hold | maintained. The other column 31 is supported on the engine mounting frame 30 by a pin P so as to be swingable.
[0040]
The left and right support columns 31 and the grip operating rod 32 are integrally formed by bending a single pipe material 36 into a U-shape, and the mounting portion of the support column 31 to the engine mounting frame 30 is formed. As shown in FIGS. 9 and 10 (A), the base end portion 31A including the base end portion 31A is reinforced by fitting a reinforcing pipe material 37 into the pipe material 36. The base end portion 31A includes an engine mounting frame. The tip portion including the attachment portion to 30 is configured to be crushed into a plate shape. The pipe material 36 and the reinforcing pipe material 37 are made of metal such as iron, and the reinforcing pipe material 37 has the same thickness as the pipe material 36 and has an outer diameter substantially equal to the inner diameter of the pipe material 36. Even if it has a thickness greater than the pipe material 36, a thickness smaller than the pipe material 36, or an outer diameter smaller than the inner diameter of the pipe material 36 good.
[0041]
As shown in FIG. 8, a travel indicator 38 made of synthetic resin (including rubber) can be rotated around the axis x of the grip operation rod 32 in the left-right positioning state at the center of the left and right of the grip operation rod 32. It is installed.
As shown in FIGS. 11 to 13 (A) and (B), the travel indicator 38 includes an indicator portion 38A and a cylinder portion 38B for mounting on the grip operating rod 32, and the cylinder portion 38B is an indicator portion. The closed posture that forms the cylindrical portion 38B with the half-cylindrical fixed portion 38a continuous to 38A and the fixed portion 38a with the connecting portion as a fulcrum in a state of being connected to the end side of the fixed portion 38a and the gripping operation of the fixed portion 38a The movable portion 38b is a half-cylindrical cylinder that is swingable to an open posture that allows attachment to and removal from the rod 32, and a bolt 38d that is screwed into the nut 38c to fix the movable portion 38b to a closed posture. Yes. In addition, the means for holding the rotation posture in an arbitrary state while allowing the rotation associated with the operation of the travel indicator 38 is a means for holding by the frictional force between the cylinder portion 38B and the grip operating rod 32.
[0042]
The means for positioning the travel indicator 38 to the left and right with respect to the grip operation rod 32 forms positioning protrusions 39 on two outer peripheral surface portions of the grip operation rod 32 that face each other in the diametrical direction. This is a means for forming a circumferential groove 40 that engages the protrusion 39 in the left-right direction on the inner peripheral surface of the cylindrical portion 38B to prevent the cylindrical portion 38B from moving left and right. It is formed from the projecting end of a pin 41 such as a roll pin that is inserted and held in a state where both end portions project outward from the outer peripheral surface of the gripping operation rod 32 in the diametrical direction.
[0043]
The auxiliary operation tool 25 includes a pair of left and right leg portions 25a and a grip operation lever portion 25b for connecting the ends of the leg portions 25a, as shown in FIGS. And is attached to the support 31 of the operation tool 33 at the tip of the leg 25a so as to be swingable around the axis y in the left-right direction. The operation can be freely changed between the brake release position and the clutch disengagement / brake position.
[0044]
As a means for linking the auxiliary operating tool 25 and the main clutch C, as shown in FIGS. 3, 4, 7, and 8, a third operated arm 42 that swings integrally with the tension arm 16 is provided. When the auxiliary operating tool 25 is positioned at the clutch engaged / braking release position, the tension arm 16 is swung to the clutch engaged position and the auxiliary operating tool 25 is connected to the third operated arm 42 and the one leg 25a. A means for providing a clutch release wire 43 that is interlocked so that the tension arm 16 is located at the clutch disengagement position when it is located at the clutch disengagement / braking position, and the auxiliary operation tool 25 is located at the clutch engagement / brake release position. When the main clutch / brake pedal 18 is depressed, the auxiliary operating tool 25 is disengaged and the clutch is moved to the braking position. 43 is configured to block by slack.
[0045]
The means for linking the auxiliary operation tool 25 and the brake B can swing around the axis of the main clutch / brake pedal 18 as shown in FIGS. A fourth operated arm 45 that is linked to the second operated arm 27 is provided via a link 44, and the auxiliary operating tool 25 engages the clutch and releases the brake between the fourth operated arm 45 and the other leg 25a. A brake that is interlocked so that the second operated arm 27 is positioned at the braking position when the second operated arm 27 is positioned at the braking release position and the auxiliary operating tool 25 is positioned at the clutch disengagement / braking position. A release wire 46 is provided, and the auxiliary operation tool 2 accompanying the depression operation of the main clutch / brake pedal 18 in a state where the auxiliary operation tool 25 is located at the clutch engagement / brake release position. It is composed of swinging to the clutch cutting-braking position to inhibit by slackening the brake release wire 46.
[0046]
In short, the main clutch / brake pedal 18 and the auxiliary operating tool 25 are interlocked with the main clutch C and the brake B without mutual interference.
[0047]
As shown in FIG. 14, a means for steering the driving front wheel 7 in accordance with the rotation operation of the steering handle 9 is provided on a handle shaft 47 having a steering handle 9 attached to the upper end via a pinion gear 48 and a sector gear 49. An interlocking pitman arm 50 is provided, and left and right knuckle arms 51 that swing around the kingpin axis kp integrally with the driving front wheel 7 and left and right drag links 52 that interlock the pitman arm 50 are provided.
[0048]
In the self-propelled main machine 1, as shown in FIGS. 3 to 5 and 14, the driving front wheel 7 in a posture close to a straight running posture is brought into a straight running posture by swinging the operation tool 33 to the working posture. It is configured to return. Specifically, a lever 54 that swings downward about the left and right lateral axis pp and presses the V-shaped cam surface 53 that is recessed into the pitman arm 50 to swing the pitman arm 50 to a straight running posture. The operated arm 55 connected to the lever 54 and the bracket 56 attached to the operating tool 33 are interlocked so that the lever 54 swings downward when the operating tool 33 swings to the operating position. A rod 57 is provided, and a helical spring 58 that swings and urges the lever 54 to a position where it is detached from the cam surface 53 is provided. Between the rod 56 and the operated arm 55, a spring 59 for absorbing the difference between the swinging amount of the operating tool 33 to the acting posture and the swinging amount of the lever 54 to the cam surface pressing position. It is intervened.
[0049]
[Second Embodiment]
In the first embodiment, the operation posture of the operation tool 33 is not restricted by the stopper 34, but the operation tool 33 is contacted with the operation tool 33 in a state in which the operation tool 33 is allowed to swing to the retracted posture as shown in FIG. Adjustment means for adjusting the action posture of the operation tool 33 by changing the contact position is provided. Specifically, the adjustment bolt 59 that contacts the proximal end portion of the operating tool 33 in the acting posture at the distal end portion 59a is screwed to the bracket 60 fixed to the engine mounting frame 30, and the adjustment bolt 59 is screwed. The contact position is changed in the swinging direction of the operation tool 33 by adjusting the amount, and the action posture of the operation tool 33 is adjusted.
[0050]
[Brief description of the drawings]
[Fig. 1] Side view of rice transplanter [Fig. 2] Plan view of rice transplanter [Fig. 3] Side view of the front of the machine with the operating tool in the retracted position [Fig. 4] Positioning the operating tool in the working posture FIG. 5 is a side view of the operating system with the operating tool in the retracted position. FIG. 6 is a side view of the operating system with the operating tool in the operating position. [Fig. 7] Plan view of the operation system [Fig. 8] Front view of the operation tool [Fig. 9] Transverse plan view of the operation tool [Fig. 10] Side view of the operation tool main part showing each operation position of the auxiliary operation tool [Fig. 11] Front view of notch of travel indicator tool [FIG. 12] Vertical side view of travel indicator tool [FIG. 13] Vertical side view and front view of travel indicator tool in an open state [FIG. 14] Steering operation system diagram [FIG. side view of a main part showing a second embodiment eXPLANATION oF REFERENCE nUMERALS
1 Self-propelled machine 3 Paddy field equipment 7 Front wheel
18 pedals
25 Auxiliary operation tools
25a Leg
25b Grip operation collar
31 Supporting part
32 Grip control rod 33 Control tool B Brake
C clutch
y Center axis

Claims (4)

A paddy field working device is connected to the rear part of the riding type self-propelled machine, a clutch for intermittently transmitting power to the traveling part, a brake for the traveling system, and a pedal that can operate the clutch or the clutch and the brake can be operated. Equipped with an operation tool that can be operated from the front of the left and right central part of the self-propelled machine at the front of the self-propelled machine,
Said clutch and one auxiliary operating member freely operate both the brake provided on said operating member,
The auxiliary operation tool can be swung up and down in the vertical direction with an operator holding a grip operation rod at the tip of the operation tool in front of the self-propelled main machine. Supports swinging around the axis,
Configured such that the auxiliary operating member and the pedal is not mutually interfere with each other, paddy working machine are prevented configured to be able to front wheel steering by the operation tool. A U-shape having left and right legs attached to the left and right support parts of the operation tool, and a left and right grip operation handle part connecting the ends of the left and right legs. The paddy field work machine according to claim 1, wherein the paddy field work machine is formed. The paddy field work machine according to claim 1 or 2, further comprising an adjusting means for adjusting the posture of the operation tool. The paddy field work machine according to claim 3 , wherein the operation tool is configured to be freely changeable between a retracted position and an action posture protruding forward, and an adjustment means is configured to adjust the action posture of the operation tool.

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