JP2008072921A - Thresher in combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an upper frame body from being closed while wrongly leaving tools, replacement parts or the like in a threshing chamber when closing the upper frame body after finishing maintenance or the like in the threshing chamber by opening the upper frame body in a thresher in a combine harvester opening and closing the upper frame body covering the upper part of the threshing chamber through an actuator relative to a lower frame body 23. <P>SOLUTION: The thresher in the combine harvester is constituted as follows. Foreign matter-detecting means 52F and 52R for detecting the foreign matters present between both frame bodies 17 and 23 are installed, and when the foreign matters are detected by the foreign matter-detecting means 52F and 52R, the control for stopping the closing operation of the upper frame body 17 is carried out when the upper frame body 17 is in an opened state relative to the lower frame body 23. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a combine threshing device that opens and closes an upper frame covering an upper part of a handling chamber via an actuator.

In the conventional combine, the upper frame that covers the upper part of the handling chamber is configured to be openable and closable with a pivot fulcrum shaft along one side thereof as a fulcrum, and the upper frame is opened and closed by the power of the electric motor Therefore, there is known a threshing apparatus that can easily open and close the upper frame even if the combine is a large model. (For example, see Patent Document 1)
Japanese Patent Laying-Open No. 2005-102593 (page 4-5, FIGS. 5 to 6)

  And the opening / closing operation switch which performs the opening / closing operation | movement of the upper frame in the conventional threshing apparatus is arrange | positioned at the outer surface of the threshing apparatus, and consists of a pair of up-down switch and down switch.

  However, after the above-mentioned up switch is turned on and maintenance of the inside of the handling chamber is performed with the upper frame opened, when the down switch is turned on to close the upper frame, In some cases, the upper frame may be closed with the tools or replacement parts left unattended, and in this case, the handling chamber cannot be closed securely, and the handling room or replacement parts may be damaged. there were.

An object of the present invention is to solve the above-described problem, and includes an actuator that opens and closes an upper frame that covers an upper portion of a handling chamber with respect to a lower frame, an operation unit that operates the actuator, In a combine threshing apparatus including a control unit that outputs an upper frame opening / closing command to an actuator based on an operation of an operation means, when the upper frame is open with respect to the lower frame, A first feature is that a foreign matter detection means for detecting a foreign matter in between is provided, and when the foreign matter is detected by the foreign matter detection means, a control for stopping the closing operation of the upper frame is executed. .
The second feature is that the control is stopped when the upper frame is closed.

According to the first aspect of the present invention, after performing maintenance or the like in the handling chamber with the upper frame opened with respect to the lower frame, it is mistakenly placed on the handling chamber or the threshing feed chain without performing sufficient inspection. Even when the upper frame is closed with tools or replacement parts left unattended, foreign matter between the upper and lower frames is detected by the foreign matter detection means, and the upper frame is closed. Since the control to be stopped can be executed, at this time, it is possible to avoid the occurrence of damage to the handling chamber and the like by removing the foreign matter on the handling chamber and the threshing feed chain, and to reliably close the upper frame. it can.
And since the said control is stopped when an upper frame is closed, the malfunction of detecting the grain threshing threshing in a handling chamber as a foreign object does not occur when performing a normal threshing operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a combine 1. The combine 1 is a pre-processing unit 2 that cuts cereal grains, and a threshing device that threshs grains from the harvested cereal grains and selects the threshed grains. 3, a grain tank 4 that temporarily stores the selected grain, a grain discharge auger 5 that transports the grain in the grain tank 4 to the outside of the machine, and a threshed waste to the rear of the aircraft A waste transporting part 6 for transporting, a post-processing part 7 for discharging wastes at the rear part of the machine body, a control part 9 provided with a seat 8 and the like, and a pair of left and right crawler travel devices 10 are provided.

  The threshing device 3 includes a handling cylinder 11 in which a plurality of teeth 11a are implanted on the outer periphery, a handling chamber 12 in which the handling cylinder 11 is installed, and a threshing feed chain that conveys cereals along the handling chamber 12. 13, a pinch rail 14 arranged along the upper side of the threshing feed chain 13, a sorting chamber 15 for sorting the threshed grain, and the picked up grain to the grain tank 4. It is mounted on the left side of the fuselage with a milling cylinder 16 (see FIG. 2) and the like.

  As shown in FIGS. 2 and 3, the upper portion of the handling chamber 12 is covered with an upper frame body 17. The upper frame body 17 is supported by a fulcrum shaft 18 along the front-rear direction on the center side of the body of the handling chamber 12 so as to be opened and closed, and is opened when cleaning the inside of the handling chamber 12 or performing inspections. It has become. More specifically, the fulcrum shaft 18 is rotatably supported on the upper side surface side of the handling chamber 12 in parallel with a rotation shaft 27 of the handling cylinder 11 described later, and a plurality of rotating arms fixed to the fulcrum shaft 18. An upper frame 17 is supported via 19 so as to be rotatable up and down.

  Further, an operating arm 21 is fixed to the fulcrum shaft 18 described above, and by an expansion / contraction operation of an actuator (in this embodiment, an electric cylinder is used) 22 that is connected to the operating arm 21 and is driven forward and backward. The upper frame 17 is configured to be openable and closable, and a gas spring 24 that urges the upper frame 17 in the opening direction is provided between the upper frame 17 and the lower frame 23 constituting the threshing device 3. It is intervening.

  The upper frame body 17 of the present embodiment supports the handling cylinder 11 and the pinching rail 14 and is connected to the waste transport chain 25 and the waste cover 26, and by opening the upper frame body 17. The handling cylinder 11, the clamping rail 14, the waste conveying chain 25, and the waste cover 26 can be integrally raised and rotated. However, the present invention is limited to such a configuration. Is not to be done.

  The rotating shaft 27 of the handling cylinder 11 is pivotally supported by front and rear side plates 28 formed integrally with the upper frame body 17, and the opening operation of the upper frame body 17 is performed outside the front and rear side plates 28. An open lock mechanism 29 for locking is provided. The open lock mechanism 29 can be engaged with a lock plate 32 that is swingable via a support shaft 31 projecting from the front and rear side plates 28, and an engagement groove (notch) 32a formed in the lock plate 32. A lock pin 33 provided on the lower frame body 23, a lock release lever 35 supported on the upper frame body 17 via a support shaft 34 so as to be swingable, and the like are provided. Swing guidance is provided between the locked posture and the unlocked posture. In the figure, reference numeral 37 denotes an unlock detection switch for detecting that the unlock lever 35 is held in the unlock posture.

  More specifically, the lock release lever 35 is connected to the lock plate 32 via a rod 38, a swing plate 39, and a rod 41, and the lock release lever 35 is lifted from the lock posture (see FIG. 2) and locked. By swinging to the release posture, the locked state (locked state) of the lock plate 32 locked to the lock pin 33 can be released.

  That is, when the upper frame 17 is fully closed, the opening of the upper frame 17 is locked by engaging the engagement groove (notch) 32 a of the lock plate 32 with the lock pin 33. In this state, when the lock release lever 35 is swung upward, the engaging groove 32a of the lock plate 32 is detached from the lock pin 33 and the opening operation of the upper frame 17 is allowed. .

  Moreover, the opening / closing operation switches 42 and 43 for performing the opening / closing operation of the upper frame body 17 via the actuator 22 are provided adjacent to the outer surface of the threshing device 3, that is, the center of the side cover 44 covering the feed chain 13 vertically. It is. Both the operation switches 42 and 43 employ momentary switches and are always covered with a transparent cover body 45, and can be operated with the cover body 45 lifted up and opened.

  As shown in FIG. 5, the combine 1 includes a control unit 51 configured using a microcomputer (including a CPU, a ROM, a RAM, and the like). On the input side of the control unit 51, an opening operation switch 42 and a closing operation switch 43 for opening and closing the upper frame body 17 are provided below the upper frame body 17 during the closing operation of the upper frame body 17 which will be described in detail later. Foreign matter detecting means 52F and 52R for detecting foreign matter, an operating stroke upper limit detecting switch 53A, an operating stroke lower limit detecting switch 53B and an unlock detecting switch 37 of the actuator attached to the actuator (electric cylinder) 22 are connected.

  More specifically, as shown in FIG. 1, a foreign object detection is provided above the support frame 55 that supports the sandwiching rail 14 and that is parallel to the support frame 55 and that can swing up and down around the intermediate portion P in the front-rear direction. A bar 56 is provided, and the foreign matter below the upper frame 17 during the closing operation of the upper frame 17 described above is placed at a position in contact with the upper surface side in the vicinity of both front and rear ends of the foreign matter detection bar 56 that swings up and down. Front and rear foreign matter detection switches are provided as foreign matter detection means 52F and 52R to detect.

  Further, the foreign object detection bar 56 is supported so as to be movable up and down with respect to the upper frame body 17, and a compression spring 57 that urges the center portion thereof toward the sandwiching rail 14 side and a tension spring that suspends both left and right ends. 58, 58, and the urging force of these springs is set so that the compression spring 57> the tension springs 58, 58.

  By the way, between the threshing feed chain 13 and the pinching rail 14 arranged along the upper side of the threshing feed chain 13, an operation of closing the upper frame 17 was performed while leaving a tool, a replacement part, or the like. In this case, if a tool or a replacement part is sandwiched between the front connection node 14a and the threshing feed chain 13 shown in the drawing rail 14 composed of a plurality of connection nodes 14a to 14d, for example, The guide pin 61a that is guided to move up and down moves upward, and the upper end of the guide pin 61a contacts the foreign object detection bar 56. Therefore, the front end side of the foreign object detection bar 56 swings upward about the fulcrum P. As a result, the upper surface of the front end side of the foreign object detection bar 56 comes into contact with the front foreign object detection switch 52F, and the foreign object detection switch 52F is turned on.

  That is, according to the above-described configuration, the foreign object detection bar 56 swings up and down with its front-rear direction intermediate portion P as a fulcrum, and therefore threshing is performed on the front side of the front-rear direction intermediate portion P of the foreign object detection bar 56 that is a vertical swing support point. When a foreign object is caught between the feed chain 13 and the sandwiching rail 14, the front foreign object detection switch 52F is turned on, and the rear part of the foreign object detection bar 56, which is the vertical swing fulcrum, is located behind the intermediate part P in the front-rear direction. When a foreign matter is sandwiched between the threshing feed chain 13 and the pinching rail 14 on the side, the rear foreign matter detection switch 52R is turned on.

  On the other hand, on the output side of the control unit 51, an alarm buzzer 62 for notifying that a foreign object has been caught between the threshing feed chain 13 and the pinching rail 14 and an actuator 22 for opening and closing the upper frame 17 are connected. .

  Next, the closing control of the upper frame 17 by the control unit 51 described above will be described based on the flowchart shown in FIG.

  First, in step S1, it is determined whether or not the closing operation switch 43 for closing the upper frame body 17 is turned on. If it is turned on, the process proceeds to step S2. Return.

  In step S2, whether or not the operating stroke lower limit detection switch 53B of the electric cylinder 22 which is an actuator for opening and closing the upper frame 17 is turned on, that is, whether or not the upper frame 17 is completely closed is determined. If it is determined to be ON, the process proceeds to step S3. If it is not ON, the process proceeds to step S4.

  In step S3, the operation of the electric cylinder 22 is stopped. In step S4, the electric cylinder 22 is contracted, that is, the upper frame 17 is closed, and the process proceeds to step S5.

  In step S5, it is determined whether the foreign matter detection switches 52F and 52R on the front side or the rear side are turned on, that is, whether foreign matter is sandwiched between the threshing feed chain 13 and the pinching rail 14. If both the foreign matter detection switches 52F and 52R are not ON, the contraction operation of the electric cylinder 22 is continued, and if any one of the both foreign matter detection switches 52F and 52R is turned ON, the process proceeds to step S6.

  In step S6, while outputting to the alarm buzzer 62 which notifies that the foreign material was pinched | interposed between the threshing feed chain 13 and the pinching rail 14, the contraction action | operation of the electric cylinder 22 is stopped, and it progresses to step S7.

  In step S7, the electric cylinder 22 is extended for a certain period of time, that is, control is performed to open the upper frame 17 in a state in which the foreign matter sandwiched between the threshing feed chain 13 and the pinching rail 14 is released. It is configured as follows.

  That is, according to the above-described closing control of the upper frame body 17, maintenance is performed in the handling chamber 12 with the upper frame body 17 opened with respect to the lower frame body 23, and then sufficient inspection is not performed. Even when an operation for closing the upper frame 17 is performed while leaving a tool, a replacement part, or the like in the handling chamber 12 by mistake, the foreign matter between the upper frame 17 and the lower frame 23 is detected as foreign matter detection means (foreign matter). Detection switches) 52F and 52R detect and stop the closing operation of the upper frame body 17, and further execute the control to open the upper frame body 17 for a certain period of time after stopping the closing operation of the upper frame body 17. Therefore, it is possible to avoid damage to the handling chamber 12 and the like by removing the foreign matter in the handling chamber 12 and the threshing feed chain 13 at this time, and the upper frame 17 can be reliably closed. When the upper frame 17 is closed, the operation stroke lower limit detection switch 53B of the actuator (electric cylinder) 22 that opens and closes the upper frame 17 is ON, and the control is stopped. There is no inconvenience of detecting, as a foreign object, cereals that are threshed in the handling chamber 12 when performing work.

  As described above, when the upper frame 17 is closed from the opened state with respect to the lower frame 23, various embodiments are provided as foreign matter detection means for detecting foreign matter between the upper frame 17 and the lower frame 23. Conceivable. For example, when a potentiometer is attached to the fulcrum shaft 18 of the rotating arm 19 of the upper frame body 17 and a foreign object is sandwiched between the upper frame body 17 and the lower frame body 23 during the closing operation of the upper frame body 17, The foreign matter detection means may be configured by obtaining an abnormal change in angular velocity during the closing operation of the upper frame 17 by a potentiometer. Similarly, when a foreign object is caught between the upper frame body 17 and the lower frame body 23 during the closing operation of the upper frame body 17, an overload of the actuator 22 that opens and closes the upper frame body 17 is detected to detect the foreign object. It is also possible to configure the means.

  By the way, what is illustrated in FIG. 7 is provided with a pedestal 67 in which a commercially available fuel carrying can 66 can be placed in an inclined position in the vicinity of the fuel filler 65 of the fuel tank provided in the fuselage 1. The fuel carrying can 66 is fastened to the fuel carrying can 66 using a belt 68, and a fuel supply pipe 69 reaching the bottom of the fuel carrying can 66 is provided without leaking from the cap 66a of the fuel carrying can 66 and the fuel filling port 65 of the fuel tank. Furthermore, the fuel in the fuel carrying can 66 can be automatically supplied to the fuel tank by using a siphon pump or the like (not shown).

The partially broken side view of a combine. The front view of the threshing apparatus of the state which closed the upper frame. The front view of the threshing apparatus of the state which opened the upper frame. The side view of the rear part side of a closed combine. The block diagram of a control part. The flowchart which shows upper frame body closing control. The front view which shows the mounting method of a fuel carrying can.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 3 Threshing apparatus 12 Handling chamber 17 Upper frame 22 Actuator 23 Lower frame 42 Operation means (open operation switch)
43 Operating means (closing operation switch)
51 Control unit 52F Foreign matter detection means (rear foreign matter detection switch)
52R Foreign matter detection means (front foreign matter detection switch)

Claims (2)

  An actuator (22) for opening and closing the upper frame (17) covering the upper part of the handling chamber (12) with respect to the lower frame (23), operating means (42, 43) for operating the actuator (22), In the threshing device (3) of the combine (1) provided with a control unit (51) for outputting an opening / closing command of the upper frame (17) to the actuator (22) based on the operation of the operation means (42, 43), When the upper frame (17) is in an open state with respect to the lower frame (23), foreign matter detection means (52F, 52R) for detecting foreign matter between the two frames (17, 23) are provided, The combine threshing apparatus is configured to execute control to stop the closing operation of the upper frame (17) when the foreign matter is detected by the foreign matter detection means (52F, 52R).   The combine threshing device according to claim 1, wherein the control is stopped when the upper frame (17) is closed.

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