JP3716393B2 - Field leveling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural field leveling machine used for, for example, leveling work in an agricultural scene and transporting work such as harvested items and agricultural work tools.
[0002]
[Prior art]
Conventionally, as this type of field leveling machine, those disclosed in Japanese Patent Publication No. 59-3607, Japanese Utility Model Publication No. 61-45245, Japanese Utility Model Publication No. 56-55327, Japanese Patent Publication No. 63-20969, and the like are known.
[0003]
In this conventional structure, a mounting frame is connected to the tractor, and a transporting base comprising a transporting base is provided on the mounting frame so as to be able to tilt backward, and a locking portion and a locking member are provided between the mounting frame and the transporting base. A releasable locking mechanism is provided, and a plow body is attached to the mounting frame in a front-falling manner.
[0004]
Thus, for example, carrying a harvested product or farm equipment on a carriage, or carrying forward the tractor while holding the plow in a forward and downward manner, and plowing the soil in a high field Then, the ground removed is guided into the carriage by a scraper, the tractor is moved to a low place on the field, the operator manually releases the locking mechanism at that position, and the carriage is lifted by its own weight. By tilting backward, the soil in the carriage is discharged to a low place in the farm scene, thereby performing the leveling work on the farm field.
[0005]
[Problems to be solved by the invention]
However, in the case of the above-described conventional structure, during the tilting operation of the carriage, the locking member is manually lifted and released, and the locking load is large, so an excessive force is required for the manual operation. Therefore, it is difficult to operate, and remote control in the vicinity of the driver's seat is difficult, and workability may be reduced.
[0006]
[Means for Solving the Problems]
The present invention aims to solve these disadvantages. Among the present inventions, the invention according to claim 1 is that the mounting frame is connected to the tractor by a connecting mechanism, and the carriage is tilted backward to the mounting frame. It is possible to install, a plow body is attached to the mounting frame, a releasable locking mechanism comprising a locking part and a locking member is provided between the mounting frame and the carriage, and the locking member is released. The release member comprises a rotatable release member to be operated, a release actuator for releasing and turning the release member, a restriction portion provided on the release member, and a correction member capable of elastically contacting the restriction portion. A field leveling machine comprising a safety mechanism capable of correcting inertial over-rotation of a member and capable of holding the release member in a fixed position.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 to 7 show an embodiment of the present invention. Reference numeral 1 denotes a tractor. In this case, a mounting frame 3 is connected to a rear portion of the tractor 1 by a connecting mechanism 2.
[0008]
The coupling mechanism 2 includes a lower link 4 projecting at the lower part of the left and right sides of the tractor 1, a swing arm 5 projecting from the upper part of the left and right sides of the tractor 1, and the middle part of the swing arm 5 and the lower link 4. The upper link 7 projecting from the upper portion of the tractor 1 and the lower link 4 and the upper link 7 are connected to the mounting frame 3 by connecting pins 8. The mounting frame 3 is configured to be movable up and down by a swing arm 5 that swings by hydraulic pressure.
[0009]
Reference numeral 9 denotes a plow body, which is formed into a square frame shape in the rear view with the mounting frame 3 in an L shape when viewed from the side. A stopper portion 11 is formed on the back surface of the mounting body 9 and a stopper body 12 is provided on the lower surface of the horizontal rod 3b of the mounting frame 3 so that the sliding body 9 is held in a forwardly lowered state and supported by a lifting / retracting mechanism (not shown). The plow body 9 is configured to be pivotable about the shaft 10.
[0010]
Reference numeral 13 denotes a carriage. In this case, the left and right side plates 15, the front plate 16, and the rear plate 17 are erected on the four sides of the rectangular bottom plate 14, and the front plate 16 faces the gap 9. A soil inlet 18 is formed.
[0011]
Further, a reinforcing rod 19 is attached to the bottom plate 14 of the carriage 13, the rear portion of the horizontal rod 3b is pivotally attached to the reinforcing rod 19 by a fulcrum shaft 20, and the carriage 13 is attached so as to be tiltable backward about the fulcrum shaft 20.
[0012]
21 is a locking mechanism, and 22 is a safety mechanism. In this case, a horizontal bar 13b is attached between the upper parts of the vertical bar 13a of the carriage 13, and two support pieces 23 are arranged in parallel at the center of the upper surface of the horizontal bar 13b. A pin-shaped locking portion 24 is installed between the support pieces 23, while a support piece 25 is attached in parallel to a horizontal rod 3c provided between the vertical rods 3b, and a fulcrum pin 26 is installed between the support pieces 25. The locking member 27 is pivotally attached to the fulcrum pin 26, and a stopper portion 27 a that can contact the upper surface of the horizontal bar 3 c is formed at the base end portion of the locking member 27 and the distal end of the locking member 27. A hook-shaped part 27b that can be hooked and locked to the locking part 24 is formed on the part, and the tip of the locking member 27 can be elastically pulled downward between the locking member 27 and the horizontal hook 3c. A spring 28 is hung, and a lock rod 29 is inserted into the locking member 27 so as to be rotatable and slidable. An insertion hole 30 through which the tip end of the collar 29 is inserted and locked is formed in one locking piece 23, and an insertion hole 31 through which the tip of the lock collar 29 is inserted and locked is also formed in the locking member 27. When not in use or the like, the lock spring 32 is inserted into and held in the insertion hole 30 by the lock spring 32 to prevent the locking member 27 from swinging upward around the fulcrum pin 26 and during operation. For example, when the lock rod 29 is removed from the insertion hole 30 and the lock rod 29 is rotated and removed and inserted into the insertion hole 31, the locking member 27 can swing upward about the fulcrum pin 26. The operation lever 33 protrudes from the locking member 27.
[0013]
Thus, in a state in which the locking member 27 is swingable, the hook-shaped portion 27b of the locking member 27 is detached from the locking portion 24 by swinging the locking member 27 upward about the fulcrum pin 26, As a result, the carriage 13 tilts backward with its own weight about the fulcrum shaft 20, and when the carriage 13 is raised from the tilted state, the locking portion 24 is locked to the hook-shaped portion 27 b of the locking member 27. As a result, the rearward tilting of the own weight around the fulcrum shaft 20 of the carriage 13 is prevented.
[0014]
Further, in this case, a mounting plate 34 is erected on the horizontal bar 3c, a release actuator 35 as a motor in this case is installed on the mounting plate 34, and a disc-shaped release member 36 is provided on the main shaft 35a of the release actuator 35. A lifting roll 37 is provided horizontally on the attachment / release member 36, and a pressing plate 38 that is pressed upward by the rotation of the lifting roll 37 by the rotation of the release actuator 35 is formed on the locking member 27. In addition, an operation switch 39 for rotating and stopping the release actuator 36 is disposed in the vicinity of the driver's seat, the release actuator 35 is rotated by a pushing operation of the operation switch 39, and the turning is stopped by stopping the pushing operation. By stopping and lifting the locking member 27 upward by this rotation, the hook-like portion 27b and the locking portion 24 of the locking member 27 are detached and the locking is released. It is configured to.
[0015]
Further, a setting portion 36 a is formed on the release member 36, a correction member 41 is slidably provided on the mounting plate 34 by a guide plate 40, and a spring hook pin 42 is protruded from the base end portion of the correction member 41 to be spring-loaded. A diameter of the correction member 41 is provided between the pin 42 and the mounting plate 34 so that the tip of the correction member 41 can be pressed against the setting portion 36 a, and the protrusion limit of the correction member 41 is formed at the base end of the correction member 41. The large stopper portion 41a and the rear end portion of the guide plate 40 are restricted and configured.
[0016]
Since this embodiment is configured as described above, a harvested product or an agricultural machine is mounted on the transport table 13, and if necessary, the locking mechanism 21 is released and the transport table 13 is tilted backward to discharge various transports. Work can be performed, and when the plow body 9 is held forward and downward and the tractor 1 travels forward, the soil at a high place in the farm scene is scraped off by the plow body 9, and the scraped soil is removed from the plow body 9. The tractor 1 is guided to the inside of the carriage 13 and moved to a low place in the field, the locking mechanism 21 is released to tilt the carriage 13 backward by its own weight, and the soil in the carriage 13 is moved to the field scene. It is discharged to a low place, so that the field leveling work is performed.
[0017]
At this time, when the release actuator 35 is driven by pushing the operation switch 36 in the locked state shown in FIGS. 4 and 6, the release member 36 is rotated clockwise, and the lifting roll is rotated by this rotation. 37 abuts on the pressing plate 38 at the position of the imaginary line in FIG. 6, and further pushing up of the pressing plate 38 is completed at the imaginary line ahead of the next rotation direction by the further rotation. As shown in FIG. 7, the locking member 27 rotates upward about the fulcrum pin 26, whereby the hook-shaped portion 27 b is detached from the locking portion 24, and the locking mechanism 21 is automatically released. As a result, the carriage 13 tilts backward with its own weight about the fulcrum shaft 20, and when the push of the operation switch 36 is stopped, the drive of the release actuator 35 is stopped. As shown in FIGS. Lifting roll 37 is in front The release member 36 stops at the stand-by position in which it is placed, and when the carriage 13 is raised from the tilted state in this state, the locking portion 24 is locked to the hook-shaped portion 27b of the locking member 27. This prevents backward tilting of its own weight about the fulcrum shaft 20 of the carriage 13, 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. Accordingly, the locking and releasing operations of the locking mechanism 21 can be easily performed, and the safety can be improved.
[0018]
Further, when the release member 36 is rotated, the correction member 41 is pushed backward against the spring 42 by the setting portion 36a, and the setting portion 36a is detached from the correction member 41 during the rotation, and the spring is used. 42, the correction member 41 protrudes forward, stops and is held at the protrusion advance position by contact between the large diameter stopper portion 41a and the rear end portion of the guide plate 40, and completes one rotation of the release member 36 as shown in FIG. The setting portion 36a comes into contact with the correction member 41 and stops at a fixed standby position, and even if the release member 36 overrotates against the spring 42 due to the inertia of the release actuator 35 at this time. The correction member 41 pushes back the setting portion 36a and holds the release member 36 in a fixed position as shown in FIG. 6. Therefore, the correction plate 41 is erroneously over-rotated, and the pressing plate 38 is pushed up by the lifting roll 37. The locking state between the 27 and the locking portion 24 can be prevented to unstable, therefore, can be performed safely locking and tilting of the carriage 13.
[0019]
The present invention is not limited to the above-described embodiment, and the structure of the locking mechanism 21 and the safety mechanism 22 including the locking member 27 and the locking portion 24 is appropriately changed and designed. The actuator 35 is not limited to an electric drive motor, but may be a hydraulic motor or an electric rotary solenoid structure. The release operation of the release member is released by rotating the release member with a release actuator. Although it is configured to operate, it is also possible to adopt a structure in which the release member is released by a reciprocating movement other than rotation using a link mechanism or the like.
[0020]
【The invention's effect】
As described above, according to the first aspect of the present invention, the release member causes the release member to release the release member by rotating the release member with the release actuator. The lifting mechanism can be tilted rearward by automatic release, and the safety mechanism consists of a restricting part provided on the releasing member and a correction member capable of elastically contacting the restricting part, and corrects inertia over-rotation of the releasing member Since the release member can be held in a fixed position, if the release member over-rotates due to the inertia of the release actuator, the correction member pushes the release member back and holds it in place. Thus, the locking state between the locking member and the locking portion can be made stable, and the carriage can be locked and tilted safely.
[0021]
As described above, the intended purpose can be sufficiently achieved.
[Brief description of the drawings]
FIG. 1 is an overall side view of an embodiment of the present invention.
FIG. 2 is a partially enlarged side view of an 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 sectional side view of an embodiment of the present invention.
FIG. 5 is a partial lateral view of an embodiment of the present invention.
FIG. 6 is a partial sectional side view of an embodiment of the present invention.
FIG. 7 is a partial sectional side 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 Carriage 21 Locking mechanism 22 Safety mechanism 24 Locking part 27 Locking member 35 Release actuator 36 Release member
36a Restriction part 41 Correction member

Claims (1)

A mounting frame is connected to the tractor by a connecting mechanism, a carriage is provided on the mounting frame so as to be able to tilt backward, a plow is attached to the mounting frame, and a locking portion and a locking are provided between the mounting frame and the carriage. it is provided a releasable locking mechanism comprising a member, a rotatable release member for releasing operating the locking member, a release actuator for releasing rotational movement of said release member, provided in said releasing member And a correction member capable of elastically abutting against the restriction portion, and a safety mechanism capable of correcting inertial over-rotation of the release member and capable of holding the release member in a fixed position is provided. A field leveling machine characterized by that.

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