JP6174389B2 - Agricultural machine - Google Patents

Description

  The present invention relates to a farm machine, and more particularly, to a farm machine capable of extending an extension working unit in a farm machine that is attached to a tractor and performs farm work.

  In an agricultural machine that is attached to a tractor and performs agricultural work, the width of the working part that performs agricultural work can be increased by extending the extended working part by a folding mechanism or the like. In addition, by folding the extension working part and storing it, the entire width can be shortened during movement.

  For example, Patent Document 1 describes a mechanism for folding a soil crushing device attached to a tractor using a hydraulic cylinder.

  In order to prevent the extension working part from moving due to a force greater than the holding force of the cylinder during work or movement, there are cases where a fixing means for locking is provided. Patent Document 2 describes an agricultural machine that is fixed by a fixing means when an extension work body is extended. At this time, a long hole is provided in the link mechanism so that the extension work body can be extended or stored by one cylinder and fixed or released by the fixing means.

Japanese Utility Model Publication No. 5-70208 JP 2006-129964 A

  However, if one cylinder can be used to extend or store the extension work body and to fix or release it by the fixing means, the following problem also occurs. First, since the link mechanism for the fixing means is interlocked with the cylinder, it is necessary to manufacture it with high precision at the time of manufacturing, and in some cases, adjustment for that is required. In addition, in order to link the fixing means with the cylinder, it has a link mechanism for moving the fixing means such as a long hole, and there may be a problem in certainty when an unexpected external force is applied. is there. Further, the cylinder needs a stroke for locking with the fixing means, and the efficiency of the cylinder for extending or storing the extension working portion is lowered.

  Furthermore, in the case of a hydraulic cylinder, if the hydraulic control lever is operated by mistake, the extension working part moves unintentionally and is dangerous. Also, if you have locking means or earthing means, and if you operate the hydraulic control lever before preparing for extension or storage, these means may interfere at unintended positions and cause failure. It also becomes.

  In view of the above problems, an object of the present invention is to provide an agricultural machine that improves the reliability of a mechanism that extends an extended working part in an agricultural machine that is attached to a tractor and performs an agricultural work.

In order to achieve the above object, a farm machine according to the present invention is a farm machine that is mounted on a tractor and performs farm work. A work unit that performs farm work, an extension work part that can extend a work width of the work part, and the extension work A hydraulic cylinder that operates in an extended state or a non-extended state, hydraulic operating means for operating the hydraulic cylinder, a valve provided in an oil passage to the hydraulic cylinder, and a control unit that can control the valve An operation unit capable of remotely transmitting a signal to the control unit, and a lock mechanism capable of locking the extended state of the extension work unit, and the control unit is configured to start an operation from the operation unit. When a start signal is received, the valve is turned on after the lock mechanism is unlocked, and the hydraulic cylinder can be operated by the hydraulic operating means.

Further, the agricultural machine according to the present invention is an agricultural machine that is attached to a tractor and performs agricultural work, a working part that performs agricultural work, an extended working part that can extend a working width of the working part, and the extended working part in an extended state or A hydraulic cylinder that operates in a non-extended state, hydraulic operating means for operating the hydraulic cylinder, a valve provided in an oil passage to the hydraulic cylinder, a control unit that can control the valve, and the control unit A control unit capable of remotely transmitting a signal, a lock mechanism capable of locking the extended state of the extension working unit, and a detecting means for detecting whether or not the extension working unit is in the extended state. When the operation start signal for starting the operation is received from the operation unit, the valve is turned on to enable the operation of the hydraulic cylinder by the hydraulic operation means, and by the detection means And extended state is detected, when receiving the operation end signal for ending the operation from the operation unit, characterized in that it makes the locking of the locking mechanism.

Further, the agricultural machine of the present invention is an agricultural machine that is attached to a tractor and performs agricultural work.
A working part for performing farm work, an extended working part capable of extending the working width of the working part, a hydraulic cylinder that operates the extended working part in an extended state or a non-extended state, and hydraulic operating means for operating the hydraulic cylinder And a valve provided in an oil passage to the hydraulic cylinder, a control unit capable of controlling the valve, an operation unit capable of remotely transmitting a signal to the control unit, and a rear part of the agricultural machine. A leveling body for leveling the cultivated soil, and a leveling body driving device for driving the leveling body, and the control unit receives the operation start signal for starting the operation from the operation unit. A body drive device is driven to lock the leveling body at a fixed position, and the valve is turned on to enable the hydraulic cylinder to be operated by the hydraulic operating means .

Agricultural machine of the present invention to is found, the control unit receives the operation start signal from the operation unit, after the extension or the storing operation of the extension work unit has been completed, by driving the leveling member driving device The ground leveling body is unlocked by the working unit and the extended working unit in the extended state.

  ADVANTAGE OF THE INVENTION According to this invention, the reliability of the mechanism which extends the extension operation part of a farm work machine can be improved in the farm work machine which attaches to a tractor and performs farm work.

It is a plane schematic diagram showing one embodiment of the agricultural machine of the present invention. It is a hydraulic circuit diagram showing one embodiment of the agricultural machine of the present invention. It is a front view which shows an example of the agricultural machine of this invention. It is a rear view which shows an example of the agricultural machine of this invention. It is a front view which shows an example of the operation part in the agricultural working machine of this invention. It is a principal part enlarged view which shows a 1st state in an example of the agricultural machine of this invention. It is a principal part enlarged view which shows a 2nd state in an example of the agricultural machine of this invention. It is explanatory drawing which shows the locked state of the locking mechanism in the agricultural machine of this invention, (a) is a top view, (b) shows a front view. It is explanatory drawing which shows the releasing state of the lock mechanism in the agricultural machine of this invention, (a) is a top view, (b) shows a front view. It is explanatory drawing which shows an example of the limit switch in the agricultural machine of this invention. It is explanatory drawing which shows an example which the limit switch in the agricultural machine of this invention detects the extended state of an extension work part. It is explanatory drawing which shows an example in which the limit switch in the agricultural machine of this invention detects the non-extension state of an extension work part. It is explanatory drawing which shows an example when the 2nd leveling body in the agricultural working machine of this invention is a working state. It is explanatory drawing which shows an example in case the 2nd leveling body in the agricultural machine of this invention is a soil-drawing state. An example of the flowchart when moving the extension work part in the agricultural working machine of this invention from an extended state to a storage state is shown. An example of the flowchart when moving the extended work part in the agricultural working machine of this invention from a storage state to an extended state is shown.

  A mode for carrying out the present invention will be described.

  FIG. 1 is a schematic plan view showing an embodiment of the agricultural machine according to the present invention. The present invention has a system capable of extending the extension working part 6 in the farm work machine 2 that is attached to the tractor 1 and performs farm work. A farm work machine 2 is attached to the rear of the tractor 1. An operation unit 13 for remotely operating the tractor 1 near the driver seat 4 can be disposed. Further, a hydraulic operation lever 21 is provided in the vicinity of the driver seat 4 of the tractor 1. Further, the tractor 1 has a tractor side hydraulic valve 22.

  The farm work machine 2 has a working unit 5 that is attached to a tractor for working, and an extension working unit 6 that allows the working unit to be extended. In FIG. 1, the extension work part 6 can be extended at both ends of the work part 5. The farm work machine 2 has a work machine side hydraulic valve 23 and a hydraulic cylinder 24, and is connected to a tractor side hydraulic valve 22 and a hydraulic operation lever 21 provided in the tractor 1 by a hydraulic circuit. A specific example of the hydraulic circuit will be described with reference to FIG. Further, the farm work machine 2 includes a wireless transmission / reception unit 14, a control unit 16, a limit switch 17, a lock motor 18, and an earthing motor 19, and can be electrically exchanged by wiring or the like. Note that the arrangement and wiring in FIG. 1 are merely examples, and the present invention is not limited to this as long as the following control is performed. Further, as a power source for the wireless transmission / reception unit 14 and the control unit 16, for example, a suitable power source such as a tractor battery can be used.

  The operation unit 13 is an operation unit that can be operated remotely, and a specific example will be described later. In FIG. 1, the operation unit 13 includes a wireless transmission / reception unit so that wireless transmission / reception can be performed. By using a wireless connection, no wiring is required for operation. In addition, although wiring is required, this invention is applicable also by remote control by a wire.

  The wireless transmission / reception unit 14 receives a signal generated by an operation from the operation unit 13 and sends the signal to the control unit 16. In addition, information from the control unit 16 may be transmitted to the operation unit 13 as necessary.

  The control unit 16 controls the lock motor 18, the earthing motor 19, and the work implement side hydraulic valve 23 based on signals from the operation unit 13 and the limit switch 17. The control unit 16 may be configured by a device necessary for control and stored in a box.

  The limit switch 17 can detect whether or not the extension working unit 6 is extended by the action of the switch. Further, a specific example of the limit switch 17 suitable for the present invention will be described later, but detection means such as a sensor other than the limit switch can be applied as long as this object can be achieved.

  The lock motor 18 is a motor for moving the lock mechanism. Specific examples suitable for the present invention will be described later.

  The earthing motor 19 is a motor for moving the second leveling body, and a specific example will be described later.

  The hydraulic operation lever 21 is installed in the vicinity of the driver's seat 4 of the tractor 1, and the operator can control ON / OFF of the hydraulic pressure by operating the lever. In addition, as long as the operation can be performed for the same purpose, it is also possible to use an operation means having a lever shape.

  The tractor side hydraulic valve 22 is a valve installed on the tractor side. When performing the control of the present invention, the valve is in an open state.

  The work machine side hydraulic valve 23 can select whether or not to shut off the oil passage by switching the valve or the like under the control of the control unit.

  The hydraulic cylinder 24 is a cylinder that is actuated by sending hydraulic pressure in conjunction with the hydraulic operation lever 21. The hydraulic cylinder 24 is installed so as to extend or retract the extension working portion 6, and the extension working portion 6 can be operated in the extended state or the retracted state by the force of the cylinder.

  In addition, it is possible to provide a buzzer mechanism that informs by sound according to the control of the control unit 16. The buzzer may be installed in the control unit 16, the operation unit 13, or in another suitable place.

  FIG. 2 is a hydraulic circuit diagram showing an embodiment of the agricultural machine according to the present invention. The hydraulic tank 28 is installed on the tractor side, for example. Two oil passages are connected from the hydraulic tank 28, and the two oil passages are branched on the way through a hydraulic operation valve 21 a interlocked with the hydraulic operation lever 21. All of the branched oil passages are connected to the left and right hydraulic cylinders 24 (24a, 24b) via work implement side hydraulic valves 23 (23a, 23b, 23c, 23d), respectively. In this case, one oil passage is branched and connected to the space on the rod side of the hydraulic cylinders 24a and 24b, and the other oil passage is branched to the space on the opposite side to the rod of the hydraulic cylinders 24a and 24b. It is connected.

  Here, the hydraulic operation lever 21 is interlocked with the hydraulic operation valve 21a, and when the operator operates the hydraulic operation lever 21, it is possible to select whether the oil passage is shut off or to be connected to. The work machine side hydraulic valve 23 (23a, 23b, 23c, 23d) is configured by, for example, a solenoid valve, and can select whether the valve is switched or the oil path is blocked by control from the control unit 16.

  In a state where all the work machine side hydraulic valves 23 are open (not shut off), the operator operates the hydraulic operation lever 21 so that the hydraulic path is switched by the hydraulic operation valve 21a and the hydraulic cylinder 24 is desired. It can be moved in the direction of For example, when the hydraulic operation lever 21 is tilted in one direction from the shut-off state of the hydraulic operation valve 21a, the hydraulic cylinder 24 is extended, and when the hydraulic operation lever 21 is tilted in the other direction, the hydraulic cylinder 24 is contracted. It is.

  At this time, the work implement side hydraulic valve 23 is controlled by the control unit to close (shut off) the work implement side hydraulic valve 23 in the oil passage connected to the hydraulic cylinder 24 that is not the object of operation. Malfunctions can be prevented. For example, when not operated, all the work machine side hydraulic valves 23a, 23b, 23c, and 23d are closed. When operating the hydraulic cylinder 24a, only the work machine side hydraulic valves 23a and 23b are opened and the hydraulic cylinder 24b is operated. For example, only the work machine side hydraulic valves 23c and 23d are opened.

  FIG. 3 is a front view showing an example of the agricultural machine according to the present invention. FIG. 4 is a rear view showing an example of the agricultural machine according to the present invention. In FIGS. 3 and 4, an alternative working machine 50 is shown as the agricultural working machine 2. The scratching work machine 50 includes a folding mechanism, and can select whether to extend the work width by extending the extension work parts 55 on both sides of the central work part 54 or to shorten the lateral length by folding. Here, the central working unit 54 corresponds to the working unit 5 in FIG. 1, and the extension working unit 55 corresponds to the extending work unit 6 in FIG. The hydraulic cylinder 56 corresponds to the hydraulic cylinder 24 of FIGS.

  Agricultural work is performed by attaching the front side of the scraper work machine 50 to the rear part of the tractor. The PTO power from the tractor is transmitted from the transmission case 58 to the input shaft 51 protruding forward, and further transmitted from the input shaft 51 to a transmission mechanism such as a gear and a shaft included in the transmission case 58 and the frame pipe 59. Further, the power is transmitted to a scraping shaft 62 provided with a scraping claw (not shown in FIGS. 3 and 4) provided inside the cover 52 and the first leveling body 53 via a chain case or the like. Then, in the cover 52 and the first leveling body 53, the scraping work is performed by moving the rake on (the scraping shaft 62) and moving the tractor forward. The scraper work machine 50 has a second leveling body 60 and an extended leveling body 61 for leveling the field.

  With the hydraulic cylinders 56 on both sides, the rotation mechanism 57 can be actuated to fold the extension working parts 55 on both sides, and the overall width of the scraping work machine 50 can be shortened. The extension working unit 55 is folded around a rotation shaft 57 a included in the rotation mechanism 57. In addition, the rotation shaft 57a is arranged alternately so as not to interfere even when the extension working portions 55 on both sides are folded by changing the left and right angles. Moreover, although a center working part becomes long, the thing which does not change the right-and-left angle of a rotating shaft may be used. Further, the locking mechanism 30 is provided between the central working part 54 and the extension working part 55, and the extension working part 55 can be locked in the extended state. By locking with the locking mechanism 30, even if a force greater than the holding force of the hydraulic cylinder 56 is applied to the extension work part 55 during work or the like, the extension work part 55 can be prevented from being folded by that force.

  The cover 52 is positioned below the mission case 58 and the frame pipe 59 and covers the upper portion of the claw claw. On the other hand, the first leveling body 53 covers the rear side surface of the scratching claw, and a second leveling body 60 having substantially the same width as that of the first leveling body 53 is arranged in the vertical direction below the first leveling body 53. It is connected so that it can rotate. Then, the scraping shaft 62 is rotated and cultivated, and the second leveling body 60 moves forward while contacting the surface of the field, thereby leveling the surface and leveling the field. On the other hand, at the outer end portion of the second leveling body 60 of the extension work section 55, the extension leveling body 61 can be rotated and extended in conjunction with the arm 77 of the extension leveling body driving device 70, respectively. Further, the second leveling body driving device 80 selects whether to perform the earthing work mode or the normal scraping work mode by changing the angle of the second leveling body 60 via the second leveling body link means 81. it can.

  FIG. 5 is a front view showing an example of an operation unit in the agricultural machine according to the present invention. An operation unit 40 is shown as an example of the operation unit 13 in FIG.

  When the power switch 40a is pressed, the power is turned on and the indicator lamp 40m is turned on.

  The start switch 40b is a switch for starting to extend or store the extension work unit 55.

  The end switch 40c is a switch for extending or retracting the extension work unit 55.

  The left switch 40d is a switch to be pressed when only the extension work part 55 on the left side is to be extended or stored after the start switch 40b is pressed.

  The right switch 40e is a switch to be pressed when only the extension work part 55 on the right side is to be extended or stored after the start switch 40b is pressed.

  The switch 40f is a switch for extending the left extension leveling body 61, the switch 40g is a switch for storing the left extension leveling body 61, and the switch 40h extends the right extension leveling body 61. The switch 40i is a switch for storing the right extended leveling body 61.

  The switch 40j is a switch that puts the second leveling body 60 in the normal scraping operation state, and the switch 40k is a switch that puts the second leveling body 60 in the earthing state.

  FIG. 6 is an enlarged view of a main part showing the first state in an example of the agricultural machine according to the present invention. FIG. 7 is an enlarged view of a main part showing a second state in an example of the agricultural machine according to the present invention. These drawings show enlarged views of main parts corresponding to FIGS. The state of FIG. 6 is a state in which the extension work part 55 is extended and opened, and the state of FIG. 7 is a state in which the extension work part 55 is stored and folded (closed state).

  The hydraulic cylinder 56 has one end attached to a rotatable attachment portion 56a provided on the rotation mechanism 57 side and the other end attached to a rotatable attachment portion 56b provided on the central working portion 54 side. ing.

  The rotation mechanism 57 is provided in the vicinity of the boundary between the central work unit 54 and the extension work unit 55 and positioned above the scraping work machine 50 in a state where the extension work unit 55 is extended. There are a rotating frame 57b fixed to the central working part 54 side (frame pipe 59) and a rotating frame 57c fixed to the extended working part 55 side (frame pipe 59). Is extended, and is engaged so as to be rotatable around the rotation shaft 57a in the vicinity of the tip. On the other hand, one of the link members 57d is rotatably installed in the middle of the rotating frame 57b, and one of the link members 57e is rotatably installed in the middle of the rotating frame 57c. Each of the link members 57d and 57e extends toward the upper side of the rotation shaft 57a. The other of the link members 57d and 57e is rotatably attached as an attachment portion 56a of the hydraulic cylinder 56.

  The lock mechanism 30 is provided near the boundary between the central working unit 54 and the extended working unit 55, below the rotating mechanism 57 and near the upper side of the cover 52. The hook 31 of the locking mechanism 30 can be locked by rotating when the lock motor 32 is operated and engaging with the hook engaging portion 33. Details will be described with reference to FIGS. The hook 31 is installed on the extension work part 55 side in the vicinity of the boundary between the central work part 54 and the extension work part 55, and the hook engagement part 33 is in the center work near the boundary between the central work part 54 and the extension work part 55. It is installed on the part 54 side. It is also possible to provide the hook 31 on the central working part 54 side and the hook engaging part 33 on the extension working part 55 side, contrary to FIG.

  In the state of FIG. 6, the hydraulic cylinder 56 is extended, and the hook 31 of the lock mechanism 30 is locked. From this state, the hook 31 is rotated to disengage the hook engaging portion 33, and the lock is released. Then, after that, when the hydraulic cylinder 56 is contracted, the extension working unit 55 rotates about the rotation shaft 57a and enters the state shown in FIG. On the other hand, from the state of FIG. 7, the hydraulic cylinder 56 is extended, the extension working part 55 is moved to the extended state, the hook 31 of the lock mechanism 30 is rotated and engaged with the hook engaging part 33. 6 is locked. At this time, the second leveling body 60 of the central working unit 54 and the second leveling body 60 of the extension working unit 55 are respectively provided with a coupling part 60b and a coupling part 60c provided at the coupling side end. Combined and connected. For example, the coupling portions 60b and 60c may be configured such that the concave portion and the convex portion are engaged.

  FIG. 8 is an explanatory view showing a locked state of the lock mechanism 30 in the agricultural machine according to the present invention, where (a) is a top view and (b) is a front view. FIG. 9 is an explanatory view showing a released state of the lock mechanism 30 in the agricultural machine according to the present invention, where (a) is a top view and (b) is a front view.

  The lock motor 32 corresponds to the lock motor 18 in FIG. 1 and is installed on the base 39. The power that rotates the lock motor 32 is output from the output gear 34. One of the transmission members 35 is an arc-shaped gear 35 a and meshes with the output gear 34. The other end of the transmission member 35 is attached to the shaft 36 via the trunk portion 35b. The hook 31 has a hook portion 31 a on one side, and the other is attached to the shaft 36. The shaft 36 is rotatably installed. On the base 39, a pin 37 and a pin 38 that are stoppers for the movable range of the transmission member 35 are fixed.

  The hook engaging portion 33 has a hook engaging frame 33b extending in the lateral direction and a hook engaging shaft 33a provided near the tip of the engaging frame 33b. The hook engaging frame 33b is U-shaped when viewed from above, and the hook engaging shaft 33a is connected to the tip of the U-shape at the tip. The lock mechanism 30 is locked when the hook portion 31 a of the hook 31 engages (engages) with the hook engagement shaft 33 a of the hook engagement portion 33.

  When the lock motor 32 is rotated in one direction under the control of the control unit 16 from the state where the lock mechanism 30 in FIG. 8 is locked, the transmission member 35 moves in one direction around the shaft 36 (clockwise) via the output gear 34. And the hook 31 is also rotated in the same direction (clockwise). When the body portion 35b of the transmission member 35 comes into contact with the lower pin 37, the lock motor 32 is stopped by the control of the control portion 16, and the state shown in FIG. 9 is obtained. As a result, the hook portion 31a of the hook 31 and the hook engaging shaft 33a of the hook engaging portion 33 are engaged and the lock is released.

  Conversely, when the lock motor 32 is rotated in the other direction under the control of the control unit 16 from the state in which the lock mechanism 30 in FIG. 9 is released, the transmission member 35 is moved around the shaft 36 through the output gear 34. The hook 31 is also rotated in the same direction (counterclockwise). When the body portion 35b of the transmission member 35 comes into contact with the upper pin 38, the lock motor 32 is stopped by the control of the control portion 16, and the state shown in FIG. 8 is obtained. Thereby, the hook part 31a of the hook 31 and the hook engaging shaft 33a of the hook engaging part 33 are engaged and locked.

  FIG. 10 is an explanatory diagram showing an example of a limit switch in the agricultural machine according to the present invention. The limit switch 90 here is an example corresponding to the limit switch 17 of FIG. In the limit switch 90, the arm-shaped detection unit 90a protrudes from the main body 90b, and when it is positioned at the upper position as shown in FIG. 10, the rotation is 90 degrees counterclockwise. It is possible. Then, the angle of the detection unit 90 ranges from 10 degrees counterclockwise from 0 degrees in the state of FIG. 10 (first range), and the range from 10 degrees to 90 degrees counterclockwise of the detection unit 90 (second range). The range of detection is set to be different. In the range from 0 degree to 10 degrees counterclockwise, it is determined that the extension work part 55 is not extended (not opened), and in the range from 10 degrees counterclockwise to 90 degrees counterclockwise, the extension work unit 55 is extended. It is determined that the working unit 55 is extended (open). This detection can be performed by a mechanism or the like inside the main body 90b. Moreover, the detection part 90a is urged | biased by the force of a spring, etc., and when a force is not applied to the detection part 90a, it rotates clockwise and stops at the position of FIG. And it is possible to attach to farming machines, such as the cutting work machine 50, by the attaching part 90c.

  FIG. 11 is an explanatory diagram showing an example in which the limit switch in the agricultural machine according to the present invention detects the extended state of the extension work unit. FIG. 12 is an explanatory diagram illustrating an example in which the limit switch in the agricultural machine according to the present invention detects the non-extended state of the extension work unit. These figures correspond to the scraping work machine 50 of FIGS. Moreover, the upper part of FIG. 11 and FIG. 12 shows the state of the limit switch 90.

  The limit switch 90 is installed in the vicinity of the extension of the rotation shaft on which the link member 57d rotates with respect to the rotation frame 57b. On the link member 57d, a first protrusion 65 and a second protrusion 66, which are rod-shaped protrusions, are formed at two locations.

  In the state of FIG. 11, the first protrusion 65 on the link member 57d is installed at a position where the detector 90a is pushed counterclockwise and tilted by a certain amount or more. Thereby, the detection part 90a of the limit switch 90 is pushed counterclockwise, and is located in the 2nd range. By detecting that it is in this range, the control unit 16 can determine that the extension work part 55 on the corresponding side of the scraping work machine 50 is extended.

  On the other hand, when the hydraulic cylinder 56 is slightly contracted to the state shown in FIG. 12, the first protrusion 65 rotates clockwise as the link member 57d tilts clockwise. As a result, the detection unit 90a is rotated by the urging force of the detection unit 90a of the limit switch 90 and is positioned on the upper side, and is positioned in the first range. By detecting this range, the control unit 16 can determine that the extension work part 55 on the corresponding side of the scraping work machine 50 is not extended.

  In addition, when the detection unit 90a does not return due to mud or the like in the field and the urging force does not return to the second protrusion 66, when the hydraulic cylinder 56 is further contracted than in the state of FIG. It is a protrusion for pushing the detection unit 90a so as to rotate in the clockwise direction so as to enter the first range.

FIG. 13 is an explanatory diagram showing an example when the second leveling body in the agricultural working machine of the present invention is in a working state. FIG. 14 is an explanatory diagram showing an example when the second leveling body in the agricultural machine according to the present invention is in a soil-drawing state. These figures are explanatory diagrams when viewed from the side. The earthing motor 82 corresponds to the earthing motor 19 of FIG.

  The second leveling body link means 81 includes a first arm 81a and a second arm 81b. The second leveling body 60 is connected to the first leveling body 53 so as to be rotatable at a rotation fulcrum 60a. One end of the second arm 81b is rotatably connected to the upper part of the second leveling body 60, and the other end of the second arm 81b is rotatably connected to one end of the first arm 81a. . And the other end of the 1st arm 81a is connected to the 2nd leveling body drive device 80 side so that rotation is possible. A lock pin 81f is formed in the middle of the first arm 81a.

  The second leveling body driving device 80 is installed on the upper part of the cover 52, and includes a soil pulling motor 82, a motor gear 83, a gear member 84, a shaft 85, a rotating arm 86, a rod 87, a lock member 88, and a motor case 89. have.

  In the state of FIG. 13, the second leveling body 60 can rotate in the vertical direction with respect to the first leveling body 53, and can perform a normal scraping operation. When the earth pulling motor 82 is rotated in one direction from this state, the power output from the motor gear 83 is transmitted to the gear member 84 having a fan-like gear. Then, the shaft 85 connected to the gear member 84 is rotated clockwise, and the rotating arm 86 having one end fixed to the shaft 85 is simultaneously rotated. The other end of the pivot arm 86 is connected to be rotatable on the front side of the rod 87 (left side in FIGS. 13 and 14), and on the rear side of the rod 87 (right side in FIGS. 13 and 14) is a lock member 88. It is connected so that it can rotate. The lock member 88 is pivotally connected to the cover 52 side below the lock member 88. For this reason, the lock member 88 is rotated backward via the rod 87 as the rotation arm 86 rotates. By this rotation, the edge 88a of the lock member 88 pushes the lock pin 81f formed on the first arm 81a, and guides it to the recess 88b, resulting in the state shown in FIG. The rotation of the earthing motor 82 can be stopped by the control of the control unit 16 when the gear member 84 comes into contact with the stopper 89b of the motor case 89.

  In the state of FIG. 14, since the lock pin 81f of the first arm 81a is engaged with and fixed to the recess 88b of the lock member 88, the second leveling body link means 81 cannot move. For this reason, the 2nd leveling body 60 is being fixed in the state rotated to the lower side. If the tractor 1 is moved forward in this state, the earthing work can be performed. When the earth pulling motor 82 is rotated in the reverse direction from this state, the gear member 84 and the shaft 85 are rotated counterclockwise via the motor gear 83. Along with the rotation, the lock member 88 is rotated forward via the rod 87. By this rotation, the lock pin 81f is disengaged from the recess 88b, and the state shown in FIG. 13 is obtained. The rotation of the earthing motor 82 can be stopped by the control of the control unit 16 when the gear member 84 comes into contact with the stopper 89a of the motor case 89.

  Hereinafter, the control steps of the present invention will be described in conjunction with the above-described embodiment according to the flowcharts of FIGS. 15 and 16.

  FIG. 15: shows an example of the flowchart when moving the extension work part in the agricultural machine of this invention from an extended state to a storage state. In the initial state, in the case of the scraping work machine 50, the extended working portions 55 on both sides are extended (the states shown in FIGS. 3, 4, and 6).

  First, when the operator turns on the power switch (S101), the power-on LED on the controller lights red (S102). Here, the controller can apply the operation unit 40 of FIG. 5 described above. Then, when the power is turned on, the indicator lamp 40m is turned on by pressing the power switch 40a. The color of lighting may be other than red.

  Next, the start switch is turned on (S103). If the start switch is the operation unit 40, the start switch 40b may be pushed. The signal is sent to the control unit 16 via the wireless transmission / reception unit 14.

  Next, the buzzer is turned on (continuous sound) (S104). In this case, when the operation signal of the start switch is sent from the operation unit 40 (operation unit 13) to the control unit 16, the control unit 16 performs control to sound a buzzer. The buzzer at this time can know, for example, that the operation is being performed by surrounding people and workers as a continuous sound.

  Next, the left and right hook motors rotate to the release side (S105). 8 and 9, the left and right hooks correspond to the hooks 31, and are rotated in a direction in which the lock motor 32 is released under the control of the control unit 16 to be in the states of FIGS. 8 to 9.

  Next, it is determined whether the binding current of the left and right hook motors has been detected. If detected, the left and right hook motors are stopped (S106). In FIG. 9, the binding current may be an overcurrent that flows when the transmission member 35 abuts on the pin 37, and when the control unit 16 detects this, the lock motor 32 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent.

  Next, the left, right and center earthing motors are rotated to the earthing side (S107). As a result, the left, right, and center rakes (second leveling bodies) are locked. 13 and 14, the earthing motor 82 is rotated under the control of the control unit 16 to obtain the state of FIG. 14. As for the left, right, and center earth-moving motors and rakes (second leveling bodies), as shown in FIG. 4, the second extension working unit 55, the central working unit 54, and the right extension working unit 55 are second. The earth leveling motor of the leveling body driving device 80 and the second leveling body 60 correspond to this. At this time, it can be determined that the limit switch 90 is ON (second range) on the open side and the left, right, and center earthing motors are rotated.

  Next, it is determined whether left, right, and center earthing motor restraining currents have been detected. If detected, the left, right, and center earthing motors are stopped (S108). This completes the locking of the left, right and center rakes (second leveling bodies). In FIG. 14, the binding current may be an overcurrent that flows when the gear member 84 abuts against the stopper 89 b, and when the control unit 16 detects this, the earthing motor 82 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent. Thus, by locking the central working part 54 and the extended working parts 55 on both sides in a soiled state, the second leveling bodies 60 move along with the rotation for folding the extended working part 55. It is possible to improve safety.

  Next, the buzzer is turned on (intermittent sound) (S109). After the control part 16 performs control of S108, control which changes the sound of a buzzer into an intermittent sound is performed. When the buzzer changes from continuous sound to intermittent sound, the operator knows that the left and right hooks are unlocked, the second leveling body is locked in the earthing state, and then the left and right solenoid valves are turned on. be able to.

  Next, the left and right solenoid valves are turned on (S110). If it is FIG. 2, it will change so that the oil path interrupted | blocked by the working machine side hydraulic valve 23a, 23b, 23c, 23d may be continued by control of the control part 16. FIG. Thus, when the hydraulic operation lever 21 is operated, the hydraulic cylinder 24 (56) can be moved.

  Next, an operation of closing the hydraulic lever is performed (S111). In FIG. 2, the operator operates the hydraulic operation lever 21 to operate the hydraulic cylinder 24. In the case of the scraping work machine 50, the hydraulic cylinder 56 is contracted, and the extension work parts 55 on both sides are folded in the closing direction from the extended work state and moved to the storage position.

  Next, it is determined whether or not the limit switch is closed (S112). 10 to 12, the extension switch 55 moves from the state of FIG. 11 to the state of FIG. 12, and if it is folded more than this, the limit switch 90 enters the first range of FIG. 10. The control unit 16 determines that the extension work unit 55 is not extended (the closed side is ON).

  Next, when it is determined in S112 that the limit switch is ON to the closed side, it is determined whether or not the end switch is ON (S113). The operator turns on the end switch after operating the hydraulic operation lever 21. The end switch corresponds to the end switch 40c in the case of the operation unit 40 in FIG. When the end switch 40c is pressed, the signal is sent to the control unit 16 via the wireless transmission / reception unit 14, and based on this, the control unit 16 determines whether the end switch is turned on.

  If the end switch is ON in S113, the buzzer is ON (continuous sound) (S114). After the control part 16 performs control of S113, control which changes the sound of a buzzer into a continuous sound is performed. When the buzzer changes from continuous sound to intermittent sound, the operator can know that the signal of the end switch is sent to the control unit 16 and that the left and right solenoid valves are then turned off.

  Next, the left and right solenoid valves are turned off (S115). In FIG. 2, under the control of the control unit 16, the oil path that has been continued by the work machine side hydraulic valves 23 a, 23 b, 23 c, and 23 d is blocked. Thereby, even if the hydraulic operation lever 21 is operated, the hydraulic cylinder 24 (56) cannot be moved.

  Next, the central earthing motor is rotated to the working side (S116). As a result, the central rake (second leveling body) is released. If FIG.4, FIG.13 or FIG.14 demonstrates, the soil pulling motor 82 in the 2nd leveling body drive device 80 of the center work part 54 will be rotated by control of the control part 16, and it will be in the state of FIG. As a result, the scraping work can be performed only by the central working unit 54.

  Next, it is determined whether or not the binding current of the central earthing motor has been detected. If detected, the central earthing motor is stopped (S117). This completes the release of the central rake (second leveling body). In FIG. 13, the binding current may be an overcurrent that flows when the gear member 84 abuts against the stopper 89 a, and when the control unit 16 detects this, the earthing motor 82 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent.

  On the other hand, if the end switch does not detect ON in S113, two minutes have passed (S118), and the left and right solenoid valves are turned OFF (S119). In FIG. 2, the oil path that has been continued by the work machine side hydraulic valves 23 a, 23 b, 23 c, and 23 d is shut off after two minutes have elapsed under the control of the control unit 16. 2 minutes is an example, and it can be done after another fixed time. As a result, even if the operator forgets to operate the end switch, the left and right solenoid valves are turned OFF in a certain time, so that the hydraulic cylinder 24 (56) is erroneously operated even if the hydraulic control lever 21 is erroneously moved thereafter. There is nothing.

  When the release of the center rake (second leveling body) is completed in S117 or S119, or when the left and right solenoid valves are turned off, the buzzer is turned off (S120), and the process ends (S121). This is also performed under the control of the control unit 16. The operator can know that a series of control has been completed by turning off the buzzer.

  In FIG. 15, in the case of the scraping work machine 50, the step of simultaneously closing the extension work portions 55 on both sides from the extended state to the retracted state is described. The control unit 16 receives this by operating the left switch 40d or the right switch 40e on the corresponding side after pressing the start switch 40b of No. 5, and the lock motor 32 or the work machine side hydraulic valve 23 only on the corresponding side is received. Can be controlled.

  In S107 and S108, the left, right, and center earthing motors are rotated to the earthing side. If one side of the extension working unit is already stored, the center and the side extending earthing motors are stored. Can be rotated to the earth side. In this case, it can be determined by the limit switch 90.

  In S116 and S117, the central earthing motor is rotated to the working side. However, when only the extension work part on one side is stored and the extension work part on the other side is extended, the extension side and the center are rotated. The earthing motor may be rotated to the working side. In this case, it can be determined by the limit switch 90. For example, when the extension working part is turned on to the closed side, the earthing motor on the turned-on side remains locked.

  FIG. 16: shows an example of the flowchart when moving the extended work part in the agricultural machine of this invention from a storage state to an extended state. In the initial state, in the case of the scraping work machine 50, the extended working parts 55 on both sides are stored and folded (state shown in FIG. 7).

  First, when the worker turns on the power switch (S201), the power-on LED on the controller is lit red (S202). Here, the controller corresponds to the operation unit 40 described above. When the power is turned on, the indicator lamp 40m is turned on by pressing the power switch 40a. The color of lighting may be other than red.

  Next, the start switch is turned on (S203). If the start switch is the operation unit 40, the start switch 40b may be pushed. The signal is sent to the control unit 16 via the wireless transmission / reception unit 14.

  Next, the buzzer is turned on (continuous sound) (S204). In this case, when the operation signal of the start switch is sent from the operation unit 40 (operation unit 13) to the control unit 16, the control unit 16 performs control to sound a buzzer. The buzzer at this time can know, for example, that the operation is being performed by surrounding people and workers as a continuous sound.

  Next, the left and right hook motors rotate to the release side (S205). 8 and 9, the left and right hooks correspond to the hooks 31. At this time, since the extension working part 55 is in a folded state, the lock mechanism 30 is not locked, but the hook 31 may be moved for some reason. The lock motor 32 is rotated under the control of the control unit 16, and the position of the hook 31 is set to the state shown in FIG.

  Next, it is determined whether the binding current of the left and right hook motors has been detected. If detected, the left and right hook motors are stopped (S206). In FIG. 9, the binding current may be an overcurrent that flows when the transmission member 35 abuts on the pin 37, and when the control unit 16 detects this, the lock motor 32 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent.

  Next, the central earthing motor is rotated to the earthing side (S207). As a result, the central rake (second leveling body) is locked. Referring to FIGS. 4, 13, and 14, the earthing motor 82 in the second leveling body driving device 80 of the central working unit 54 is rotated under the control of the control unit 16 to obtain the state of FIG. 14. At this time, it can be determined that the limit switch 90 is ON (first range) on the closed side and the central earthing motor is rotated.

  Next, it is determined whether or not the binding current of the central earthing motor has been detected. If detected, the central earthing motor is stopped (S208). Thereby, the lock | rock of the center rake (2nd leveling body) is completed. In FIG. 14, the binding current may be an overcurrent that flows when the gear member 84 abuts against the stopper 89 b, and when the control unit 16 detects this, the earthing motor 82 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent. Since the extension work part 55 is locked in the earthing state in S107, if the central work part 54 is locked in the earthing state, all of the center work part 54 and the extension work part 55 are locked in the earthing state. The Thereby, when the extension work part 55 is opened and extended, the extension work part 55 and the second leveling body 60 of the central work part 54 are reliably connected by the joint parts 60a and 60b (FIGS. 5 and 6).

  Next, the buzzer is turned on (intermittent sound) (S209). After the control part 16 performs control of S208, control which changes the sound of a buzzer into an intermittent sound is performed. When the buzzer changes from continuous sound to intermittent sound, the operator knows that the left and right hooks are unlocked, the second leveling body is locked in the earthing state, and then the left and right solenoid valves are turned on. be able to.

  Next, the left and right solenoid valves are turned on (S210). If it is FIG. 2, it will change so that the oil path interrupted | blocked by the working machine side hydraulic valve 23a, 23b, 23c, 23d may be continued by control of the control part 16. FIG. Accordingly, when the hydraulic operation lever 21 is operated, the hydraulic cylinder 24 (56) can be moved.

  Next, an operation of opening the hydraulic lever is performed (S211). In FIG. 2, the operator operates the hydraulic operation lever 21 to operate the hydraulic cylinder 24. In the case of the scraping work machine 50, the hydraulic cylinder 56 extends, and the extension work portions 55 on both sides move from the folded storage state to the opening direction to be in the extension work state.

  Next, it is determined whether or not the limit switch is open (S212). 10-12, the extension work part 55 is moved from the state shown in FIG. 12 to the state shown in FIG. 11, and the extension work part 55 is extended when the limit switch 90 enters the second range shown in FIG. The control unit 16 determines that the opening side is ON.

  Next, when it is determined that the limit switch is turned on from the closed side to the open side, the left, right, and center earthing motors are rotated to the working side (S213). As a result, the left, right and center rakes (second leveling bodies) are released. 4, 13, and 14, the earthing motor 82 in the second leveling body driving device 80 of the central working unit 54 and the left and right extending working units 55 is rotated under the control of the control unit 16. 13 states. Thereby, the second ground leveling body 60 of the central working unit 54 and the extended working unit 55 is in a working state, and the scraping work can be performed in a state where the extending working unit 55 is extended.

  Next, it is determined whether the binding currents of the left, right, and center earthing motors have been detected. If detected, the left, right, and center earthing motors are stopped (S214). This completes the release of the left, right, and center rakes (second leveling bodies). In FIG. 13, the binding current may be an overcurrent that flows when the gear member 84 abuts against the stopper 89 a, and when the control unit 16 detects this, the earthing motor 82 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent.

  Note that the steps S213 and S214 can be brought after the step S217 (the left and right solenoid valves are turned off).

  Next, it is determined whether or not the end switch is turned on (S215). The operator turns on the end switch after operating the hydraulic operation lever 21. The end switch corresponds to the end switch 40c in the case of the operation unit 40 in FIG. When the end switch 40c is pressed, the signal is sent to the control unit 16 via the wireless transmission / reception unit 14, and based on this, the control unit 16 determines whether the end switch is turned on.

  If the end switch is ON in S215, the buzzer is ON (continuous sound) (S216). After the control part 16 performs control of S215, control which changes the sound of a buzzer into a continuous sound is performed. When the buzzer changes from continuous sound to intermittent sound, the operator can know that the signal of the end switch is sent to the control unit 16 and that the left and right solenoid valves are then turned off.

  Next, the left and right solenoid valves are turned off (S217). In FIG. 2, under the control of the control unit 16, the oil path that has been continued by the work machine side hydraulic valves 23 a, 23 b, 23 c, and 23 d is blocked. Thereby, even if the hydraulic operation lever 21 is operated, the hydraulic cylinder 24 (56) cannot be moved.

  Next, the left and right hook motors rotate to the lock side (S218). 8 and 9, the control unit 16 performs control so that the lock motor 32 is rotated to move the hook 31, and the state shown in FIG. 9 is changed to the state shown in FIG.

  Next, it is determined whether the binding current of the left and right hook motors has been detected. If detected, the left and right hook motors are stopped (S219). In FIG. 8, the binding current may be an overcurrent that flows when the transmission member 35 abuts on the pin 38. When the control unit 16 detects this, the lock motor 32 is stopped. Note that this detection may be a configuration using another sensor (a limit switch, a potentiometer, or the like) without being an overcurrent.

  On the other hand, if the end switch is not detected to be ON in S215, after 2 minutes have passed (S220), the left and right solenoid valves are turned OFF (S221). In FIG. 2, the oil path that has been continued by the work machine side hydraulic valves 23 a, 23 b, 23 c, and 23 d is shut off after two minutes have elapsed under the control of the control unit 16. 2 minutes is an example, and it can be done after another fixed time. As a result, even if the operator forgets to operate the end switch, the left and right solenoid valves are turned OFF in a certain time, so that the hydraulic cylinder 24 (56) is erroneously operated even if the hydraulic control lever 21 is erroneously moved thereafter. There is nothing.

  When the left and right hook motors are stopped in S219 or the left and right solenoid valves are turned off in S221, the buzzer is turned off (S222), and the process ends (S223). This is also performed under the control of the control unit 16. The operator can know that a series of control has been completed by turning off the buzzer.

  FIG. 16 illustrates the step of opening the extension working portions 55 on both sides from the retracted state to the extended state at the same time in the case of the scraper working machine 50. The control unit 16 receives this by operating the left switch 40d or the right switch 40e on the corresponding side after pressing the start switch 40b of No. 5, and the lock motor 32 or the work machine side hydraulic valve 23 only on the corresponding side is received. Can be controlled.

  In S207 and S208, the central earthing motor is rotated to the earthing side. If the extension work part on one side is already extended, the earthing motors on the extended side and the central work part are turned on. You may rotate to the earth side. In this case, it can be determined by the limit switch 90.

  In S213 and S214, the left, right, and center earthing motors are rotated to the working side, but when only one side is extended, the extended side and center earthing motors may be rotated to the working side. In this case, it can be determined by the limit switch 90. For example, when the limit switch detects closing (ON on the closing side), the earthing motor of the detecting extension working unit is not released.

  15 and 16, when the start switch is turned on, the left and right solenoid valves are turned on, so that the hydraulic cylinder can be operated. Until then, if the solenoid valve is turned off, the hydraulic pressure can be changed. Inadvertent operation of the cylinder can be prevented. In addition, when the start switch is turned on, the extension working unit can be moved by moving to a position where the left and right hooks are unlocked before turning on the left and right solenoid valves when the start switch is turned on. Even if the hook does not get caught. In addition, when the second leveling body driving device is provided, when the start switch is turned on, the second leveling body is locked in the soiling state at a certain position, thereby reliably extending the extension working unit. Or storage becomes possible. Then, after the extension or retracting operation of the extension work part is completed, the scraping work can be immediately performed by releasing the lock of the second leveling body of the center work part and the extension work part in the extended state. it can. Furthermore, by providing a limit switch (detection means), the extended state can be detected, and in the extended state, the hook can be locked. Further, by providing the buzzer, the control state after the start switch is turned on can be transmitted to the surroundings according to how the buzzer sounds. Further, by turning off the solenoid valve after the end switch is turned on, it is possible to prevent a subsequent inadvertent operation of the hydraulic cylinder. Even if the end switch is not turned ON, the solenoid valve is turned OFF after a lapse of a certain time, thereby preventing an inadvertent operation due to forgetting to press the end switch.

DESCRIPTION OF SYMBOLS 1 Tractor 2 Agricultural working machine 5 Working part 6, 55 Extension working part 13, 40 Operation part 16 Control part 17, 90 Limit switch 18, 32 Lock motor 21 (Hydraulic operation means) Hydraulic operation lever 21a Hydraulic operation valve 23, 23a , 23b, 23c, 23d Work machine side hydraulic valves 24, 24a, 24b, 56 Hydraulic cylinder 30 Lock mechanism 31 Hook 50 Scratch work machine 54 Central work part 57 Rotating mechanism 40b Start switch 40c End switch 80 Second leveling body drive Device 81 Second leveling body link means 82 Earthing motor 88 Lock member 90 Limit switch

Claims (4)

In agricultural machines that are attached to tractors and perform agricultural work,
A working part for performing farm work, an extended working part capable of extending the working width of the working part, a hydraulic cylinder that operates the extended working part in an extended state or a non-extended state, and hydraulic operating means for operating the hydraulic cylinder And a valve provided in an oil passage to the hydraulic cylinder, a control unit capable of controlling the valve, an operation unit capable of remotely transmitting a signal to the control unit, and an extension state of the extension working unit are locked With a possible locking mechanism ,
When the control unit receives an operation start signal for starting an operation from the operation unit, the control unit turns on the valve after unlocking the lock mechanism, and operates the hydraulic cylinder by the hydraulic operation unit. Agricultural machine characterized by enabling In agricultural machines that are attached to tractors and perform agricultural work,
A working part for performing farm work, an extended working part capable of extending the working width of the working part, a hydraulic cylinder that operates the extended working part in an extended state or a non-extended state, and hydraulic operating means for operating the hydraulic cylinder And a valve provided in an oil passage to the hydraulic cylinder, a control unit capable of controlling the valve, an operation unit capable of remotely transmitting a signal to the control unit, and an extension state of the extension working unit are locked A possible locking mechanism, and a detecting means for detecting whether or not the extension working part is in an extended state,
The control unit turns on the valve when receiving an operation start signal for starting an operation from the operation unit, enables the hydraulic cylinder to be operated by the hydraulic operation unit, and is extended by the detection unit A farm working machine that locks the lock mechanism when a state is detected and an operation end signal for ending an operation is received from the operation unit. In agricultural machines that are attached to tractors and perform agricultural work,
A working part for performing farm work, an extended working part capable of extending the working width of the working part, a hydraulic cylinder that operates the extended working part in an extended state or a non-extended state, and hydraulic operating means for operating the hydraulic cylinder And a valve provided in an oil passage to the hydraulic cylinder, a control unit capable of controlling the valve, an operation unit capable of remotely transmitting a signal to the control unit, and a rear part of the agricultural machine. A leveling body for leveling the cultivated soil, and a leveling body driving device for driving the leveling body,
When the control unit receives an operation start signal for starting an operation from the operation unit, the control unit drives the leveling body driving device, locks the leveling body at a certain position, and turns on the valve. An agricultural machine capable of operating the hydraulic cylinder by the hydraulic operating means . In the agricultural machine according to claim 3 ,
The control unit receives the operation start signal from the operation unit, and after the extension or storage operation of the extension work unit is completed, drives the leveling body drive device, and is in the extended state with the work unit. An agricultural working machine that releases the lock of the leveling body of an extension working part .

Images