JPH0365124B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a system in which a paddy field working device is connected to the rear part of a traveling machine so that it can be freely raised and lowered by a drive mechanism, and is attached to the paddy field working device so that it can freely swing up and down. an interlocking mechanism that interlocks an operating part of the drive mechanism with the ground float so that the drive mechanism is automatically operated in a state where the height of the front end of the ground float with respect to the work equipment body is within a set range; The present invention relates to an operation structure for a working device of a paddy field working vehicle.

[Conventional technology]

The rice field working vehicle is configured to be able to work while maintaining a substantially constant working depth by automatically controlling the lifting and lowering of the working device using an interlocking mechanism, regardless of the longitudinal inclination of the traveling body.

Conventionally, in this type of paddy field work vehicle, when the working equipment that has been raised to a floating state above the ground is lowered by the interlocking mechanism, the grounding float touches the ground and the height of the front end of this float relative to the working equipment body reaches the set height. The descent could only be stopped by this, which caused the following inconveniences.

[Problem that the invention seeks to solve]

That is, for example, when lowering the working device by positioning it at the edge of the levee so as to start work as close as possible to the levee, as shown in FIG. 3, the rear end of the grounding float 7 came into contact with the ridge 29, but this was not noticed, and when the rear end of the grounding float 7 came into contact with the ridge 29, this contact and the lowering of the work equipment occurred. Due to this, the grounding float 7 was in a descending position before controlling the descending of the working device 3, and the descending operation of the working device 3 was continued, and the grounding float 7 was deformed due to the downward force of the working device. There have been times when I have been invited to trouble.

SUMMARY OF THE INVENTION An object of the present invention is to reliably and simply prevent deformation and damage caused by contact between a ground float and an obstacle during a lowering operation of a working device.

[Means for solving problems]

A feature of the present invention is that in the above-mentioned operating structure for a working device of a paddy field working vehicle, the first neutral position that is operated when the height of the front end side of the grounding float relative to the working device body is within the set range. The operating portion is located on the opposite side to the lowered position of the working device so that the operating portion has a second neutral position, and the grounding float, which is not in contact with the ground, is held in a mounting posture in which the operating portion is in the lowered position of the working device. The reason is that an elastic mechanism is provided, and its functions and effects are as follows.

[Effect]

As the work equipment descends, the rear end side of the second grounding float contacts an obstacle such as a ridge, and due to this contact and the lowering force of the work equipment, the grounding float swings forward and downward against the elastic mechanism. Even if the float is operated, the interlocking mechanism automatically switches the operation part to the second neutral position to stop the descending of the work equipment due to this float rocking, and the lowering force of the work equipment is forced to act on the grounding float. Try not to.

[Effects of the Invention] Even if the grounding float hits an obstacle such as a ridge, the lowering force of the work equipment does not forcefully act on the float, making it possible to reliably prevent deformation or damage to the float, thereby preventing carelessness. This is an advantageous design that does not cause float breakage despite difficult operations.

By performing automatic stop control of the lowering of the working equipment using the control configuration for adjusting the working depth,
Safety measures can now be taken with a simple structure of adding a second neutral position to the operating section, which is economically advantageous.

〔Example〕

As shown in FIG. 3, a paddy field working device is installed at the rear of the wheeled traveling body to be raised and lowered via a link mechanism 2 which is swung up and down by a hydraulic cylinder 1 as an example of a drive mechanism. 3 are connected to each other, and the power is transmitted from the traveling body to the paddy field working device 3, thereby forming a riding type paddy field working vehicle.

As shown in FIGS. 3 and 4, the paddy field working device 3 is constructed by a plurality of seedling planting arms 5 arranged in parallel in the lateral direction of a transmission case 4 forming a body of the working device. One first grounding float 7 is attached to the rear of the transmission case 4 and arranged in parallel in the lateral direction of the machine body, and is driven to swing up and down, and is attached to the rear of the transmission case 4 so as to take out block-shaped seedlings from the seedling table 6 and attach them to the field.
and two second grounding floats 8, 8 are attached to the lower part of the transmission case 4, and the fertilizer is driven in conjunction with the fertilizer tank 9 and the seedling planting arm 5 to take out granular fertilizer in set amounts from the fertilizer tank 9. A feed-out device 10, a first ground float 7 or a second ground float 8 connected to the fertilizer feed-out device 10 so that fertilizer is dropped and supplied via a hose 11.
It is equipped with a fertilization device having a furrower 12 attached to the fertilizer, and is capable of planting multiple rows of seedlings, and fertilizing by creating trenches in the field near each of the multiple rows of planted seedlings and supplying fertilizer to the formed trenches. I made it possible to do both at the same time.

The first grounding float 7 and the second grounding float 8 are configured to swing up and down individually around the axis P of one support shaft 13. As shown in FIG. 1, a swing link 1 in which the front end side of the first grounding float 7 is connected to the transmission case 4 so as to be movable up and down.
4, the release wire 15, the swinging link 16, the rotating shaft 17, the swinging fork 18, the interlocking pin 19, and the swinging so as to urge the spool 20a of the control valve 20 of the hydraulic cylinder 1 to the working device raised position UP. The control valve 20 is linked to the first grounding float 7 for automatic operation by an interlocking mechanism 22 consisting of a spring 21 applied to the link 16, and the seedling planting arm 5 is connected to the first grounding float 7 so that the control valve 20 is automatically operated. Automatic elevation control of the paddy field working device 3 is performed so that the height relative to the field is within a set range, so that work can be performed while maintaining the seedling planting depth approximately constant.

That is, when the height of the front end of the first grounding float 7 relative to the transmission case 4 is within the set range, the first
The control valve 20 is maintained at the first neutral position _N1 by the downward force of the grounding float 7 and the grounding. When the front end of the first grounding float 7 rises beyond the set range, the spring 21 operates the control valve 20 to the working equipment raising position UP, and the front end of the first grounding float 7 rises beyond the set range. When the first grounding float 7 descends beyond this point, the control valve 20 is operated to the working device lowering position DN by the descending force of the first grounding float 7.

The operating lever 23 shown in FIG. 1 has an interlocking rod 24,
The operating member 26 is swung through the cylindrical shaft 25, and the control valve 20 is pressed to the working device raising position UP through the interlocking pin 19 to artificially raise the working device 3, or the control valve 20 is moved to the above-mentioned interlocking position. This allows the working device to be operated to the lowered position DN by the mechanism 22.

_The control valve 20 is provided with a second neutral position N2 located on the opposite side of the first neutral position _N1 with respect to the working device lowered position DN. When the first grounding float 7 is in a non-grounding state, an example of an elastic mechanism provided between a spring receiver 27 fixed to the traveling body and the inner wire 15a of the release wire 15 is shown in FIG. The first grounding float 7 is held by the spring 28 via the release wire 15 and the swing link 14 in the mounting position in which the control valve 20 is in the work equipment lowering position DN, and the work equipment is lowered by the interlocking mechanism 22. 3, and when the working device 3 is lowered by the interlocking mechanism 22, the rear end sides of the first grounding float 7 and the second grounding float 8 are lowered as shown in FIG. Even if they come into contact with obstacles such as the ridge 29, the grounding floats 7 and 8 are prevented from being deformed or damaged.

That is, the rear end side of the first grounding float 7 contacts the obstacle, and due to this contact and the descending force of the working device 3, the first grounding float 7 is swung into a forward-downward posture. The interlocking mechanism 22 moves the control valve 20 to the second neutral position so that the lowering force of the work equipment does not forcefully act on the grounding floats 7 and 8.
Switch to _N2 to stop the lowering of the work equipment.

Reference numeral 30 shown in FIGS. 3 and 4 is a sensor that detects the presence of the adjacent seedling a by contact with the adjacent seedling a planted in the previous work process, as shown in FIG. 6. And this sensor 30
is arranged so as to be aligned with the seedling planting arm 5 in a substantially straight line in the lateral direction of the machine, and when it is in the presence detection state, the working device 3 is automatically driven, and when it is in the non-presence detection state. The operating mechanism (not shown) of the working device clutch (not shown) and the operating mechanism (not shown) of the hydraulic cylinder 1 are installed so that the working device 3 is automatically stopped and lifted when the working device 3 is in the position. (not shown) are linked for automatic operation. In other words, as shown in Fig. 6, the starting and ending positions of seedling planting and fertilization are precisely aligned with those in the previous work process, and
This makes it possible to perform work while eliminating the need to raise the work equipment when turning the machine near the shore.

[Brief explanation of drawings]

The drawings show an embodiment of the operation structure for the working device of a paddy field working vehicle according to the present invention, in which FIG. 1 is a schematic diagram of the interlocking mechanism, FIG. 2 is a side view of the spring arrangement part, and FIG. FIG. 4 is a plan view of the grounding float, FIG. 5 is an explanatory diagram of the state in which the grounding float is in contact with an obstacle, and FIG. 6 is an explanatory diagram of the working state. 1... Drive mechanism, 3... Paddy field working device, 4...
... Working equipment body, 7... Ground float, 20...
Operation unit, 22... interlocking mechanism, 28... elastic mechanism,
_N1 ...first neutral position, _N2 ...second neutral position,
DN...Work equipment lowering device.

Claims (1)

[Claims] 1. The paddy field working device 3 is connected to the rear of the traveling machine so that it can be freely raised and lowered by the drive mechanism 1. Work on a paddy field work vehicle equipped with an interlocking mechanism 22 that interlocks the operating section 20 of the drive mechanism 1 with the ground float 7 so that the drive mechanism 1 is automatically operated so that the height is within a set range. An operating structure for a device,
The first neutral position _N1 , which is operated when the front end side of the grounding float 7 relative to the work equipment body height is within the setting range, is located on the opposite side to the work equipment lowered position DN, and a second The neutral position N ₂ is set to the operating section 2.
0, and the operating section 20 moves the grounding float 7, which is in a non-grounded state, to the work equipment lowered position.
An operation structure for a working device of a paddy field working vehicle, which is provided with an elastic mechanism 28 for holding the mounting position in the DN position.