JPH09235749A - Farmland leveller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the engaging and releasing operation of an engaging mechanism by installing a releasing member releasing engaging members, an actuator for release conducting releasing operation to the releasing member and a safety mechanism capable of holding the places of engagement of the engaging member and the engaging member at fixed positions. SOLUTION: A mounting frame 3 is connected to a tractor by a connecting mechanism, and a carrier 13 is mounted on the mounting frame 3 in a backwards inclinable manner. A plow body is set up to the mounting frame 3, and a releasable engaging mechanism 21 consisting of an engaging section 24 and an engaging member 27 is fitted between the mounting frame 3 and the carrier 13. A releasing member 36, an actuator for release and a safety mechanism 22 are installed. Releasing operation is conducted to the releasing member 36 by the actuator for release and releasing operation is performed to the engaging member 27, the carrier is tilted backwards by the automatic release of the engaging mechanism, and the places of engagement of the engaging section 24 and the engaging member 27 are held at fixed positions by the safety mechanism 22. Accordingly, the engaging and releasing operation of the engaging mechanism can be carried out easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a field leveling machine used for leveling work in a field, for example, and for carrying work such as crops and agricultural machinery.

[0002]

2. Description of the Related Art Conventionally, this kind of field leveling machine has been disclosed in
No. 9-3607, Japanese Utility Model Publication No. 61-45245,
JP-B-56-55327, JP-B-63-2096
Documents such as Japanese Patent No. 9 are known.

In this conventional structure, a mounting frame is connected to a tractor, and a carrier including a carrier is provided on the mounting frame so as to be capable of tilting backward, and a locking portion and a locking portion are provided between the mounting frame and the carrier. A releasable locking mechanism composed of a locking member is provided, and the plow body is attached to the mounting frame in a front-down manner.

Therefore, for example, a harvester or an agricultural implement is mounted on a carrier for carrying work, or the plow is held forward and downward to move the tractor forward, so that the soil at a high place in the field can be used. The tractor is scraped off, and the scraped soil is guided by the plowed body into the transport base, the tractor is moved to a low place in the field, and the worker artificially releases the locking mechanism at that position, The soil is tilted rearward by its own weight, and the soil in the carrier is discharged to a low place in the field so that the land can be grounded.

[0005]

However, in the case of the above-mentioned conventional structure, when the carrier is tilted, the locking member is manually pulled up and released, which causes a large locking load. There is an inconvenience that an excessive force is required for an artificial operation, which makes it difficult to operate, and a remote operation in a position near the driver's seat is difficult, which may reduce workability.

[0006]

SUMMARY OF THE INVENTION The present invention is intended to solve these disadvantages. Of the present invention, the invention according to claim 1 is characterized in that a mounting frame is connected to a tractor by a connecting mechanism. A carrier is provided on the mounting frame so as to be tiltable rearward, a plow is mounted on the mounting frame, and a releasable locking mechanism including a locking portion and a locking member is provided between the mounting frame and the carrier. A releasing member for releasing the locking member, a releasing actuator for releasing the releasing member, and a safety mechanism capable of holding the locking position between the locking portion and the locking member at a fixed position. There is a field arranging machine characterized by being configured by providing and.

The invention according to claim 2 is characterized in that the safety mechanism according to claim 1 includes a correction member capable of correcting inertial over-rotation of the release member. It is a thing.

[0008]

1 to 7 show an embodiment of the present invention, in which 1 is a tractor, in which case a mounting frame 3 is connected to a rear portion of the tractor 1 by a connecting mechanism 2. .

The connecting mechanism 2 includes a lower link 4 projecting from lower left and right side portions of the tractor 1, a swing arm 5 projecting from upper left and right side portions of the tractor 1, a swing arm 5 and a lower link 4. It is composed of a lifting link 6 that connects the middle part and an upper link 7 that projects from the upper part of the tractor 1.
The tip end of the lower link 4 and the tip end of the upper link 7 are connected to the mounting frame 3 by a connecting pin 8, and the mounting frame 3 is configured to be vertically movable by a swing arm 5 that swings by hydraulic pressure.

Reference numeral 9 is a plow body, and the mounting frame 3 is viewed from the side L.
Formed into a square frame shape in a rear view, the plow body 9 is attached between the left and right vertical rods 3a of the mounting frame 3 by the support shaft 10 in a front-down manner, and the stopper portion 11 is formed on the back surface of the plow body 9. The stopper body 12 is provided on the lower surface of the horizontal rod 3b of the mounting frame 3,
While holding the plow body 9 in the front lowering state, the plow body 9 is centered on the support shaft 10 by a pulling and retracting mechanism (not shown).
Is configured so that it can be pulled up and rotated.

Reference numeral 13 denotes a carrier, in which case the left and right side plates 15, front plate 16, rear plate 1 are provided on the four sides of a rectangular bottom plate 14.
7 is formed upright, and a soil introduction port portion 18 is formed at a position of the front plate 16 facing the plow body 9.

Further, a reinforcing rod 19 is attached to the bottom plate 14 of the carrier 13, the rear portion of the horizontal rod 3b is pivotally attached to the reinforcing rod 19 by a fulcrum shaft 20, and the carrier 13 is attached so as to be tiltable rearward about the fulcrum shaft 20. ing.

Reference numeral 21 is a locking mechanism, and 22 is a safety mechanism. In this case, the horizontal rod 1 is provided between the upper portions of the vertical rods 13a of the carriage 13.
3b is attached, and the support piece 23 is provided at the center position of the upper surface of the horizontal rod 13b.
Two of them are installed in parallel, a pin-shaped locking portion 24 is installed between the support pieces 23, and a support piece 25 is installed in parallel on the horizontal rod 3c installed between the vertical rods 3b. A fulcrum pin 26 is installed, a locking member 27 is pivotally attached to the fulcrum pin 26, and a stopper portion 27a capable of contacting the upper surface of the horizontal rod 3c is formed at the base end portion of the locking member 27. A hook-like portion 27b that can be hooked and locked to the locking portion 24 is formed at the tip of the locking member 27, and the tip of the locking member 27 is urged downward between the locking member 27 and the horizontal rod 3c. Pullable locking spring 28
And a lock rod 29 is rotatably and slidably inserted through the locking member 27, and an insertion hole 30 through which the tip of the lock rod 29 is inserted and locked is inserted into one locking piece 23. And the locking member 27 is formed with an insertion hole 31 through which the front end of the lock rod 29 is inserted and locked, and the lock spring 32 is used to insert the front end of the lock rod 29 into the insertion hole 3 when not in use.
The fulcrum pin 2 of the locking member 27 is retained by being inserted into 0
6 is prevented from swinging upward, and at the time of work, the lock rod 29 is pulled out from the insertion hole 30, and the lock rod 29 is rotated and pulled out to be inserted into the insertion hole 31. The stop member 27 can be swung upward about the fulcrum pin 26, and the locking member 27 is provided with an operation lever 33 so as to project therefrom.

In the swingable state of the locking member 27, the locking member 27 is swung upward around the fulcrum pin 26, so that the hook-shaped portion 27b of the locking member 27 is formed.
Is disengaged from the locking portion 24, whereby the carrier 13 tilts backward by its own weight around the fulcrum shaft 20, and when the carrier 13 is raised from the tilted state, the locking portion 24
Is locked to the hook-shaped portion 27b of the locking member 27, whereby the rearward tilting of the carriage 13 about its own fulcrum shaft 20 is prevented.

In this case, the mounting plate 34 is attached to the horizontal rod 3c.
And a release actuator 35 as a motor in this case is installed horizontally on the mounting plate 34.
5, a disk-shaped releasing member 36 is attached to the main shaft 35a, a lifting roll 37 is laterally provided on the releasing member 36, and the lifting roll 37 is rotated by the releasing actuator 35. A plate 38 is projectingly formed on the locking member 27, and an operation switch 39 for rotating and stopping the release actuator 36 is arranged in the vicinity of the driver's seat, and the release actuator 35 is rotated by pushing the operation switch 39. Then, by stopping the pushing operation, the rotation is stopped, and by this rotation, the locking member 27 is lifted upward so that the hook-shaped portion 27b and the locking portion 24 of the locking member 27 are formed.
And is released to release the lock.

Further, the release member 36 is provided with a regulation portion 36a, and the mounting plate 34 is provided with a guide plate 40 and a correction member 41.
Is provided slidably, a spring hooking pin 42 is projectingly provided on the base end portion of the correction member 41, and the tip end of the correction member 41 can be elastically pressed against the regulation portion 36a between the spring hooking pin 42 and the mounting plate 34. An elastic spring 42 is provided, and the protrusion limit of the correction member 41 is regulated by contact between the large-diameter stopper portion 41a formed at the base end portion of the correction member 41 and the rear end portion of the guide plate 40. .

Since this embodiment has the above-mentioned configuration,
It is possible to mount a harvested product or an agricultural work machine on the carrier 13 and release the locking mechanism 21 as necessary to tilt the carrier 13 rearward to perform various kinds of transport and discharge work. When the tractor 1 travels forward while holding the
The soil at a high place in the field is scraped off by the plow body 9, and the scraped soil 9 is introduced and guided into the carrier 13 by the plow body 9, and the tractor 1 is moved to a low place in the field to lock the locking mechanism 21. The release operation is performed and the carrier 13 is tilted rearward by its own weight, and the soil in the carrier 13 is discharged to a low place in the field scene, whereby land leveling work in the field is performed.

At this time, in the locked state of FIGS. 4 and 6,
When the release actuator 35 is driven by pushing the operation switch 36, the release member 36 rotates clockwise, and this rotation causes the lifting roll 37 to move to the pressing plate 38 at the imaginary line position in FIG. The pressing plate 38 is abutted and further pushed to complete pushing up of the pressing plate 38 at an imaginary line in front of the next rotating direction. Since the pressing plate 38 is provided on the locking member 27,
As shown in FIG. 7, the locking member 27 rotates upward about the fulcrum pin 26, whereby the hook-shaped portion 27b is disengaged from the locking portion 24, and the locking mechanism 21 is automatically released, so that the carriage 1
3 is tilted backward by its own weight around the fulcrum shaft 20, and when the pushing of the operation switch 36 is stopped, the driving of the release actuator 35 is stopped, and the holding plate 3 is held in front of the pressing plate 38 as shown in FIGS. The release member 36 stops at the standby position where the upper roll 37 is located. In this state, when the carrier 13 is raised from the tilted state, the locking portion 24 engages with the hook-shaped portion 27b of the locking member 27. It is stopped, so that the carriage 1
3 is prevented from tilting backward by its own weight about the fulcrum shaft 20, and the locking position between the locking member 27 and the locking portion 24 is held at a fixed position by the safety mechanism 22. The locking and releasing operations of the stop mechanism 21 can be easily performed, and the safety can be improved.

When the releasing member 36 is rotated,
The straightening portion 36a pushes the correction member 41 backwards against the elastic pressure spring 42. During the rotation, the normalization portion 36a is disengaged from the correction member 41, and the elastic pressure spring 42 causes the correction member 41 to project and move forward to increase the diameter. When the stopper portion 41a and the rear end portion of the guide plate 40 are brought into contact with each other, the stopper portion 41a is stopped and held at the protruding forward position, and when the release member 36 completes one rotation, as shown in FIG.
a comes into contact with the correction member 41 and stops at a fixed standby position. At this time, even if the release member 36 is excessively rotated against the elastic spring 42 due to inertia of the release actuator 35, 41 pushes back the train wheel setting portion 36a,
As shown in FIG. 6, the release member 36 is held in a fixed position. Therefore, the release member 36 is mistakenly over-rotated and the pressing plate 38 is pushed up by the upper roll 37, and the locking member 27 and the locking portion 24 are locked. It is possible to prevent the state from becoming unstable, so that the carriage 13 can be locked and tilted safely.

The present invention is not limited to the above-described embodiment, but the structures of the locking mechanism 21 and the safety mechanism 22 composed of the locking member 27 and the locking portion 24 are appropriately modified and designed. As the releasing actuator 35, not only an electrically driven motor but also a hydraulic motor or an electric rotary solenoid structure can be applied, and the releasing operation of the releasing member is to rotate the releasing member by the releasing actuator. Although the releasing operation is performed by the above, a releasing mechanism may be used by a reciprocating movement other than the rotation by using a link mechanism or the like.

[0021]

As described above, according to the present invention, the releasing member causes the releasing member to release the engaging member by releasing the releasing member by the releasing actuator. By automatically releasing the locking mechanism, the carrier can be tilted rearward, which improves workability and the safety mechanism holds the locking position between the locking member and the locking part in a fixed position. The locking and releasing operations of the locking mechanism can be easily performed, and the safety can be improved.

Further, in the invention according to claim 2, since the safety mechanism includes the correction member capable of correcting the inertia over-rotation of the release member, the release member is operated by the inertia of the release actuator. If it is over-rotated, the correction member pushes the release member back and holds it in a fixed position, and thus the locking state between the locking member and the locking portion can be made stable, and the locking and tilting of the carrier can be achieved. Can be done safely.

As described above, the intended purpose can be sufficiently achieved.

[Brief description of drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is a partially enlarged side view of the embodiment of the present invention.

FIG. 3 is a partial plan sectional view of an embodiment of the present invention.

FIG. 4 is a partial side sectional view of an embodiment of the present invention.

FIG. 5 is a partial lateral view of an exemplary embodiment of the present invention.

FIG. 6 is a partial side sectional view of the embodiment of the present invention.

FIG. 7 is a partial side sectional view of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tractor 2 connection mechanism 3 mounting frame 9 plow body 13 carrier 21 locking mechanism 22 safety mechanism 24 locking part 27 locking member 35 releasing actuator 36 releasing member 41 correcting member

Claims (2)

[Claims] 1. A mounting frame is connected to a tractor by a coupling mechanism, a carrier is provided on the mounting frame so as to be tiltable rearward, a plow is mounted on the mounting frame, and an engaging member is provided between the mounting frame and the carrier. A releasing mechanism for releasing the locking member, a releasing actuator for releasing the releasing member, a releasing mechanism for releasing the releasing member, the engaging portion and the engaging member are provided. A field leveling machine comprising a safety mechanism capable of holding a locking position with a stop member at a fixed position. 2. The field leveling machine according to claim 1, wherein the safety mechanism includes a correction member capable of correcting inertial over-rotation of the release member.