JPH0365724B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a paddy field working device connected to the rear of a traveling machine body so that it can be freely raised and lowered by a drive mechanism, and connected to the working device body around an axis on the rear end side. a working depth control mechanism in which the grounding float and the drive mechanism are linked so that the drive mechanism is automatically operated so that the mounting angle of the grounding float, which is mounted so as to swing up and down, falls within a set range; This invention relates to a paddy field work vehicle equipped with a

[Conventional technology]

The above-mentioned work vehicle is configured to be able to work while maintaining a nearly constant working depth by automatically controlling the lifting and lowering of the working equipment using a working depth control mechanism, regardless of the forward/backward tilting of the traveling body or changes in mud depth. It is something that

Conventionally, in this type of work vehicle, work has been carried out with the mounting position of the grounding float fixed in the neutral state of the working depth control mechanism, which has caused the following disadvantages.

[Problem that the invention seeks to solve]

In other words, the weight of the working equipment acts on the traveling machine to make it tend to rise forward, so if the weight of the working equipment changes, the degree of forward climbing of the running machine changes, and the ground posture of the working equipment also changes. Change. For this reason, as the seedlings and fertilizers stored in the working equipment are consumed, the weight of the working equipment decreases due to the reduction in the weight of the seedlings and fertilizer, and the attitude of the working equipment relative to the ground changes to the forward downward direction. , the frontmost point of the grounding part of the grounding float moves to the front end of the float,
When the length of the float contacting part in the longitudinal direction increases and the working equipment is replenished with seedlings and fertilizers, the weight of the working equipment increases due to the weight of the supplies, causing the attitude of the working equipment to change to the forward upward direction. , the frontmost end of the grounding section of the grounding float moved toward the rear end of the float, and the length of the float's grounding section in the front-rear direction became shorter. In other words, as the amount of seedlings and fertilizer stored in the work equipment changes, the contact length of the ground float changes, and the contact point at the point that should swing in response to the forward/backward tilting of the traveling machine or changes in mud depth. The responsiveness of the float was changing.

An object of the present invention is to enable work while maintaining constant responsiveness of a work depth control mechanism regardless of changes in the weight of stored objects in a work device.

[Means for solving problems]

A characteristic configuration of the present invention is that the above-mentioned paddy field working vehicle is provided with a detection mechanism for detecting the weight of the paddy field working device, and also adjusts the mounting posture of the ground float in the neutral state of the working depth control mechanism. The mechanism automatically operates to lower the front of the float as the weight of the work equipment increases, and to raise the front of the float as the weight of the work equipment decreases, based on the detection results by the detection mechanism. By being linked to the detection mechanism 20 as shown in FIG.
Its action and effects are as follows.

[Effect]

Even if the weight of the working equipment changes and its attitude towards the ground changes, the float attitude adjustment mechanism automatically operates in an adjustment direction adapted to the direction of change in the attitude of the working equipment based on the detection result by the weight detection mechanism, Adjust the mounting posture of the grounding float so that the length of the float's grounding part in the longitudinal direction does not change.

〔Effect of the invention〕

By automatically maintaining the contact length of the ground float constant regardless of changes in the weight of the work equipment, the response of the working depth control mechanism is maintained regardless of the consumption or replenishment of seedlings and fertilizers stored in the work equipment. Regardless of changes in the forward/backward tilting of the traveling machine or changes in mud depth, and regardless of changes in the weight of the accumulated material in the work equipment, the work finish is improved thanks to the accuracy of extremely well-aligned working depth. Now I can get it.

〔Example〕

As shown in FIG. 2, a seedling planting device 3 is installed at the rear of the wheeled self-propelled body to be raised and lowered via a link mechanism 2 that is swung up and down by a hydraulic cylinder 1 as an example of a drive mechanism. A riding-type rice transplanter is constructed in such a manner that power is transmitted from the traveling machine body to the seedling planting device 3 via the rotating shaft 4.

As shown in FIG. 1, a plurality of ground floats 6 and 7 are attached to the lower part of the seedling planting device body 5 in parallel in the lateral direction. It is designed to swing up and down around it. A swing link 8, which connects the front end side of one of the plurality of grounding floats 6 and 7 to the seedling planting device body 5, a release wire 9, a swing interlocking device 10, a rotating shaft 11, and the hydraulic pressure cylinder 1
a swinging member 13 for slidingly operating the spool 12a of the control valve 12;
A spring 14 acts on the swinging interlocking tool 10 to urge the seedling planting device 2a to the raised position UP.
A planting depth control mechanism 15 is configured by connecting the grounding float 7 and the hydraulic cylinder 1, and the installation angle of the grounding float 7 can be controlled regardless of the longitudinal tilting of the traveling body or the change in mud depth. The hydraulic cylinder 1 is automatically operated so that the planting depth is within a set range, and the planting depth is maintained substantially constant. That is, when the front end side of the grounding float 7 swings downward beyond the set angle, the spool 12a moves to the seedling planting device lowered position due to the descending force of the grounding float 7's own weight and the downward biasing spring 16.
When the front end of the grounding float 7 swings upward beyond the set angle due to operation by DN, the spring 14
The spool 12a moves to the raised position of the seedling planting device.
It is manipulated by And the ground float 7
If the installation angle of is within the setting range, spring 1
The spool 12a is maintained at the neutral position N by the grounding of the grounding float 7 with the urging force of 4.

A frame 18 connecting the seedling planting device body 5 to the free end member 17 of the link mechanism 2 is configured to slide up and down with respect to the free end member 17, and the frame 18 A mechanism 20 for detecting the weight of the seedling planting device 3 is configured to be received and supported by the free end side member 17 via a coil spring 19. That is, the weight of the seedling planting device 3 is detected based on the length of the carp spring 19, and this detected weight is transferred to the frame 1.
8 relative to the free end side member 17. A support member 21, which pivotally supports the swing link 8 and to which the outer wire end of the release wire 9 is fixed, is attached to the connecting shaft 2.
The planting depth control mechanism 15 is pivoted to the seedling planting device body 5 so as to swing through the seedling planting device 2, and by swinging the support member 21 by swinging the operating arm 23, the planting depth control mechanism 15 is set in the neutral state. A float attitude adjustment mechanism 24 is configured to swing the mounting attitude of the grounding float 7 around the axis P. By interlocking and connecting the operating arm 23 to the frame 18 with a push-pull type release wire 25, the float attitude adjustment mechanism 24 is linked to the detection mechanism 20 so as to be automatically operated based on the detection result thereof. Seedling stand 26
Even if the weight of the seedling planting device 3 changes due to the weight change due to consumption or replenishment of the seedlings stored in the seedling, and its posture relative to the mud changes back and forth, the response of the planting depth control mechanism 15 is It is structured so that the gender does not change.

That is, as the weight of the seedling planting device 3 increases, the frame 18 is lowered and the operating arm 23 is swung in the direction of arrow D, so that the grounding float 7 is floated further forward than before. As the posture adjustment mechanism 24 is activated and the weight of the seedling planting device 3 is reduced, the frame 18 is raised and the operating arm 23 is swung in the direction of arrow U, thereby moving the grounding float 7 up to that point. The float attitude adjustment mechanism 24 is configured to operate on the side that raises it more forward, and the grounding float 7 is in contact with the ground when the planting depth control mechanism 15 is in the neutral state, regardless of the forward and backward tilting of the seedling planting device 3. This means that the length L in the front-rear direction of the portion that extends is maintained constant.

[Another example]

The present invention can also be applied to rice field work vehicles that perform fertilization work and direct sowing work in addition to seedling planting work, and the seedling planting device 3
is called the paddy field working device 3, and the planting depth control mechanism 15
is referred to as a working depth control mechanism 15.

To detect the weight of the working device, various configurations such as a mechanical type using a spring or an electric type using a strain gauge may be employed. Further, the weight detection mechanism and the float attitude adjustment mechanism may be linked by electrical means.

[Brief explanation of drawings]

The drawings show an embodiment of a paddy field work vehicle according to the present invention, and FIG. 1 is a control system diagram for the planting depth and float attachment posture, and FIG. 2 is a side view of the entire riding-type rice transplanter. 1... Drive mechanism, 3... Paddy field working device, 5...
Working device body, 7... Grounding float, 15... Planting depth control mechanism, 20... Detection mechanism, 24... Attitude adjustment mechanism.

Claims (1)

[Claims] 1 A paddy field working device 3 is connected to the rear of the traveling machine so that it can be freely raised and lowered by a drive mechanism 1, and a grounding float 7 is attached to the working device body 5 so as to swing up and down around an axis P on the rear end side. The grounding float 7 and the drive mechanism 1 are arranged such that the drive mechanism 1 is automatically operated so that the mounting angle of the float 7 and the drive mechanism 1 are within a set range.
The working vehicle for paddy fields is provided with a working depth control mechanism 15 in which the working depth control mechanism 15 is linked to The mechanism 24 for adjusting the mounting posture of the grounding float 7 is moved to the side where the front of the float is lowered as the weight of the work equipment increases, and the detection mechanism is set to the side where the front of the float is raised as the weight of the work equipment decreases. A paddy field work vehicle which is linked to the detection mechanism 20 so as to be automatically operated based on the detection result by the rice paddy field work vehicle 20.