JP5379542B2 - Combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reaping part of a combine harvester allowing removal of grain culms clogged between a pair of plant foot-transporting chains with small operation force. <P>SOLUTION: There is provided the reaping part 4 of the combine harvester 1 provided with a pair of right and left transporting device 56 in the left lower part, and transporting device 57 in the right lower part. The reaping part of the combine harvester includes: a rotating wheel 56b for release which winds a left endless rotating chain 56a on the terminal end side in the transporting direction thereof; a bracket 120 for freely rotatably supporting the rotating wheel 56b for release; a release frame 110 for freely rotatably supporting the bracket 120 through a rotating shaft 121a in the direction to approach or separate from the other transporting device 57 in the right lower part; a release lever 130 connected to a rotating shaft 123a of the rotating wheel 56b for release; a rotating wheel 150 for guide rotatably supported on the release lever 130; a contact plate 160 disposed on the lateral side of the release lever 130, and contacting the rotating wheel 150 for guide; and a fixing tool 140 for holding the release lever 130 so as to make the release lever unrotatable. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  [Technical Field] The present invention relates to a technique for releasing clogging of a portion of a grain mash at which a stock base portion of a harvested cereal joins in a lower conveyance device of a harvesting unit of a combine.

  Conventionally, the harvesting part of the combine is configured to convey the stock part of the cereals harvested by the cutting blades backward by the lower conveying device, join the harvested cereals of the left and right strips, and inherit them to the vertical conveying device. ing. A technique related to a mechanism for releasing the stuffed cereals at the merging portion of the harvested cereals is known. As a technique of such a combine harvester, a technique described in Patent Document 1 is known.

  The harvesting part of the combine described in Patent Literature 1 is fixed to a pair of stock transport chains, a rotating body that winds one stock transport chain, a bracket that supports the rotating body, and the bracket. A slide shaft and a transport frame that slidably supports the slide shaft are provided. In such a configuration, the pair of stock transport chains can be separated from each other by moving the rotating body in a direction away from the other stock transport chain. Therefore, the grain straw jammed between the pair of stock transport chains can be easily removed.

  However, in the harvesting portion of the combine described in Patent Document 1, when sawdust or the like is caught in the sliding portion between the slide shaft and the transport frame, the slide shaft and the transport frame can be smoothly slid. However, it is disadvantageous in that it may require a large force for operation or may not be operated.

Japanese Patent No. 3996843

  This invention is made in view of the above situations, and provides the harvesting part of the combine which can remove the grain culm jammed between a pair of stock transport chains with a small operating force. is there.

In Claim 1, it is provided with a pair of left and right lower conveying devices (56, 57) that sandwich and convey the stock base portion of the harvested cereal rice cake, and merge at the end portion in the conveying direction. 57) At least one of the cutting parts (4) of the combine (1) provided with an endless rotating chain (56a), and a release rotation for winding the end side of the endless rotating chain (56a) in the conveying direction A ring (56b), a bracket (120) for rotatably supporting the release rotating wheel (56b) by a rotation shaft (123a ), and the bracket (120) with respect to the other lower transfer device (57) The release frame (110) that is rotatably supported via another rotation shaft (121a) in the approaching or separating direction and the rotation shaft (123a) of the release rotating wheel (56b) are also used. release, which is pivotally connected A bar (130), a rotatable guide wheel (150) which is pivotally supported by pivot shafts provided on the release lever (130) (151), disposed on a side of said release lever (130) And a fixture (140) for holding the abutment plate (160) in contact with the guide rotating wheel (150) and the release lever (130) so as not to rotate with respect to the bracket (120). The abutting plate (160) with which the guiding rotating wheel (150) abuts forms a bent portion in the middle of the abutting portion, and the release rotating wheel is located behind the bent portion. Inclined in a direction away from (56b) .

  In Claim 2, the bracket (120) supports the rotating shaft (123a) of the release rotating wheel (56b) by plate-like members (122, 123) sandwiching the releasing rotation wheel (56b). Is.

  As effects of the present invention, the following effects can be obtained.

In claim 1, the release lever is rotated with respect to the other lower transport device by rotating the release lever and separating the bracket from the other lower transport device. It is possible to separate them, and the cereals clogged in the endless rotating chain can be easily removed.
Further, since the bracket rotates about the support shaft, the bracket can be operated smoothly. Furthermore, when operating the release lever, the guide rotating wheel rotates while contacting the contact plate, so that the load for operating the release lever can be reduced.
Further, when the left endless rotating chain 56a is urged by the tension rotating wheel 56d, tension is applied during transportation, or the cereals are clogged, the releasing rotating wheel 56b has a rotating shaft 121a direction (X direction). ) And a force is applied in the Y direction perpendicular to this direction. However, the force in the X direction is received by the rotating shaft 121a.
Further, the bracket 120 tries to rotate leftward (driving sprocket 56c side) about the rotation shaft 121a by the force in the Y direction. However, when the guide rotating wheel 150 contacts the contact plate 160, Power is taken.
Further, since the bent portion is provided in the contact plate 160, the operating force of the release lever 130 can be reduced, and the operation state and the maintenance state can be easily switched.

  According to the second aspect of the present invention, the rotation shaft of the release rotating wheel is supported by a plate-like member that sandwiches the release rotating wheel, thereby preventing the release rotating wheel from rattling.

The whole side view of the combine which comprises the cutting part which concerns on embodiment of this invention. FIG. The side schematic diagram of the cutting part concerning the embodiment of the present invention. Similarly a schematic plan view. FIG. 6 is a schematic plan view showing a working position of the clogging release mechanism. Similarly perspective view. Similarly, the A arrow view in FIG. FIG. 7 is a schematic plan view showing an operation state of the clog release mechanism. FIG. 3 is a schematic plan view showing a release position of a clog release mechanism.

  Below, the combine 1 which comprises the harvesting part 4 which is one Embodiment of the harvesting part of the combine which concerns on this invention is demonstrated.

  As shown in FIG. 1 and FIG. 2, the combine 1 has a traveling machine body 2 supported by a pair of left and right traveling crawlers 3. It is mounted so that it can be adjusted up and down. On the left side of the traveling machine body 2, a threshing unit 5 for threshing and selecting the harvested cereals is arranged, and on the right side of the traveling machine body 2, a grain tank 6 for storing grains after threshing is disposed. 5 and side by side. A discharge auger 7 is provided at the rear part of the traveling machine body 2 so as to be able to turn, and the grains inside the grain tank 6 are discharged from the throat throw port 7a of the discharge auger 7 to a truck bed or a container. It is configured as follows. An operation unit 8 is disposed in front of the grain tank 6.

  Below, the cutting part 4 is demonstrated using FIG.3 and FIG.4.

  As described above, the harvesting unit 4 captures the grain while harvesting. The cutting unit 4 mainly includes a cutting frame 10, a weed board 30, a pulling device 40, a conveying device 50, a cutting device 70, a guide spring 80, and the like.

  As shown in FIG. 3, the cutting frame 10 is a main structure of the cutting unit 4. The cutting frame 10 mainly includes a cutting input pipe 11, a vertical transmission pipe 12, a horizontal transmission pipe 13, a weed frame 14, a driving pipe 15, a pulling vertical transmission pipe 16, a pulling horizontal transmission pipe 17, a pulling drive pipe 18, and a connecting frame 19. And a support pipe 20 and the like.

  The cutting input pipe 11 is disposed at the front end of the body frame such that its axial direction coincides with the left-right direction. The vertical transmission pipe 12 is disposed in front of the cutting input pipe 11 and extends from the left and right middle portions of the cutting input pipe 11 toward the front obliquely downward direction. The horizontal transmission pipe 13 is disposed in front of the vertical transmission pipe 12 and extends from the front end of the vertical transmission pipe 12 in the left-right direction.

  The plurality of weed frames 14, 14... Are arranged in front of the horizontal transmission pipe 13, and are arranged in parallel with each other at an appropriate interval in the left-right direction. The drive pipe 15 is disposed below the front transmission pipe 13 and is horizontally provided between the left and right weed frames 14 and 14 located on the outermost side. That is, the drive pipe 15 is juxtaposed in parallel with the lateral transmission pipe 13 at a predetermined interval in the front-rear direction.

  The pulling longitudinal transmission pipe 16 is disposed above the lateral transmission pipe 13 and is erected from the left end portion of the lateral transmission pipe 13 toward the upper front obliquely. The pulling horizontal transmission pipe 17 is disposed in front of and above the horizontal transmission pipe 13, and is horizontally disposed in the right direction at the upper end portion of the pulling vertical transmission pipe 16.

  The plurality of pulling drive pipes 18, 18... Are arranged below the pulling lateral transmission pipe 17, and extend downward from the left and right midway part of the pulling lateral transmission pipe 17 in the left and right directions at predetermined intervals. The connection frame 19 is disposed behind the pulling horizontal transmission pipe 17 and extends rearward from the left and right midway part of the pulling horizontal transmission pipe 17 to the rear part of the vertical transmission pipe 12.

  The support pipe 20 is disposed below the pulling lateral transmission pipe 17 and extends downward from the left and right middle portions of the pulling lateral transmission pipe 17. The lower end of the support pipe 20 is connected to the weed frame 14 at the center of the left and right.

  Thus, the cutting frame 10 includes the cutting input pipe 11, the vertical transmission pipe 12, the horizontal transmission pipe 13, the plurality of weed frames 14, the drive pipe 15, the pulling vertical transmission pipe 16, and the pulling horizontal transmission pipe 17. The plurality of pull-up drive pipes 18, the connection frame 19, and the support pipe 20 are integrally connected.

  As shown in FIG.3 and FIG.4, the weed board 30 isolate | separates (sproutes) the grain straw of a field for every line. Each of the weed boards 30, 30... Is formed so that the tip (front end) is thin, and is projected from the front end of the weed frames 14, 14.

  As shown in FIG. 3, the pulling device 40 causes cereals after weeding. The pulling device 40 includes a plurality of pulling cases 41, 41, etc., and chains with tines 42, 42,... Wound around the pulling case 41 so as to be rotationally driven. The pulling case 41 is arranged behind the weeding board 30 with an appropriate interval in the left-right direction, and is erected between the weeding frame 14 and the pulling drive pipe 18 in a slanted shape with front, rear, and rear heights.

  As shown in FIG.3 and FIG.4, the conveying apparatus 50 conveys the grain straw caused by the pulling apparatus 40 back. The transport device 50 mainly includes a scraping mechanism 51, a transport mechanism 55, and the like.

  The scraping mechanism 51 is a mechanism that scrapes the stocker side of the grain straw caused by the pulling device 40 in a bundle. The take-in mechanism 51 is disposed on the front side of the transport device 50 and is provided at the transport start end of the transport device 50.

  The picking mechanism 51 includes a left picking device 52, a right picking device 53, and four picking wheels 54, 54,. The left scraping device 52 and the right scraping device 53 have a pair of left and right pairs of protrusion-provided belts, and the like, and are configured to be capable of rotating them. The left scraping device 52 and the right scraping device 53 are respectively arranged behind the pulling case 41 and extend in a slanted shape with front, rear, and rear heights from the pulling case 41 side toward the rear.

  Each of the four scraping wheels 54, 54,... Is a star wheel and is configured to be rotationally driven. Each of the scraping wheels 54 is disposed below the rear portion of each protrusion-equipped belt of the left scraping device 52 and the right scraping device 53, and is provided in an inclined shape with front, rear, and rear height.

  The transport mechanism 55 is disposed on the rear side of the transport device 50 and is provided at a transport intermediate portion and a transport end portion of the transport device 50. The transport mechanism 55 includes a lower left transport device 56, a lower right transport device 57, an upper transport device 58, a vertical transport device 59, and an auxiliary transport device 60. Each transport device includes a chain and the like, and is configured to be able to rotate these.

  The lower left conveying device 56 includes a left endless rotating chain 56a for conveying the cereal. The lower left transport device 56 is disposed behind the left scratching device 52 and extends in a slanted shape with a front low and a high height from the left scratching device 52 side toward the right diagonal rear. The lower right transport device 57 includes a right endless rotating chain 57a for transporting the cereal. The lower right transport device 57 is disposed behind the right picking device 53, and extends in a slanted shape with front, rear, and rear heights from the right picking device 53 side toward the left oblique rear. The conveyance end portion (right rear end portion) of the lower left conveyance device 56 is disposed so as to be close to the conveyance termination portion (left rear end portion) of the lower right conveyance device 57. Hereinafter, a portion where the lower left transport device 56 and the lower right transport device 57 are close to each other will be referred to as a joining portion.

  The upper conveyance device 58 is disposed behind the pulling device 40 and above the lower right conveyance device 57, and extends in a slanted shape with a front, a rear, and a rear height from the right scratching device 53 side toward the left oblique rear. The The vertical conveyance device 59 is disposed behind the lower left conveyance device 56 and below the upper conveyance device 58, and extends in a slanted shape with front, rear, and rear heights from the left lower conveyance device 56 side toward the left diagonal rear. Is done. The auxiliary conveyance device 60 is disposed behind the vertical conveyance device 59 and below the upper conveyance device 58, and extends from the vertical conveyance device 59 side to the threshing conveyance device 5a of the threshing unit 5 toward the rear.

  As shown in FIG. 3, the cutting device 70 is for cutting the cereals caused by the pulling device 40 on the stock side. The cutting device 70 is disposed below the scraping mechanism 51 and is provided in an inclined shape with a front, a rear, and a height.

  As shown in FIGS. 3 and 4, the guide spring 80 is a member formed by bending a plate material into a substantially U shape. The guide spring 80 is fixed to the support pipe 20 via a guide spring bracket 81 formed by bending a plate material into a substantially L shape. The guide spring 80 is disposed on the support pipe 20 so as to be positioned on substantially the same plane as the virtual plane formed by the stir ring 54. One end side of the guide spring 80 guides the culm conveyed by the lower left conveying device 56 to the merging portion, and the other end side guides the cereal conveyed by the lower right conveying device 57 to the merging portion. Respectively.

  Further, in the cutting frame 10 that supports each device, a cutting input shaft 11a is inserted into the cutting input pipe 11, and a cutting transmission shaft is inserted into the other pipes. Then, the pulling device 40, the conveying device 50, and the like are interlocked and connected to an engine (not shown) via each cutting transmission shaft and the cutting input shaft 11a. Thus, the pulling device 40, the transport device 50, and the like are configured to be able to obtain and drive power supplied from the engine as a driving source.

  With such a configuration, when each device is driven in the cutting unit 4, after the weeds are split so that the cereals in the field are separated for each line by the weed board 30, the pulling device 40 causes the pulling case 41. Causes cereals after weeding. Subsequently, after the pulling mechanism 51 of the transport device 50 is introduced from between the two left or right pulling cases 41 and 41 by the left scratching device 52, the right scratching device 53, and the scraping wheel 54, respectively. The left side or right side of the cereal grain stock side is scraped into a bunch.

  At this time, the cereal after moving is cut by the cutting device 70 on the stock side. After being cut, the cereals are transported by the transport mechanism 55 of the transport device 50 and the lower right transport device 57 transports the right two strips of cereals to the left diagonally backward. The straw is transported to the right rear side, and the stock side of the cereals for the four strips is joined at the junction.

  Next, the upper side conveying device 58 transported the left side of the stalks of the stalks to the left obliquely while being gathered together, and the vertical conveying device 59 joined the vicinity of the conveying terminal portion of the lower right conveying device 57. The stock side of the cereal grains for the four strips is conveyed rearward and obliquely upward toward the threshing conveyance device 5a of the threshing unit 5, and the auxiliary culturing device 60 transfers the threshing stock side of the cereal from the vertical conveyance device 59 to the threshing conveyance device 5 Passed to 5a. In this way, a series of harvesting operations for the cereals are performed in the harvesting unit 4.

  Further, in the cutting unit 4, the cutting frame 10 connects the front and rear halfway portion of the vertical transmission pipe 12 to the tip of a lifting cylinder 9 (see FIG. 3) that extends forward from the front lower part of the traveling machine body 2. In accordance with the expansion and contraction drive of the lift cylinder 9, it is configured to be able to rotate up and down around the cutting input pipe 11.

  The cutting frame 10 is rotated upward around the cutting input pipe 11 when the lifting cylinder 9 is extended, and is rotated downward around the cutting input pipe 11 when the lifting cylinder 9 is contracted. Thereby, the whole cutting part 4 is raised with respect to the body when the cutting frame 10 is rotated upward, and is lowered with respect to the body when the cutting frame 10 is rotated downward.

  Hereinafter, the configuration in the vicinity of the junction between the lower left transport device 56 and the lower right transport device 57 will be described in detail with reference to FIGS. 5 and 6.

  As shown in FIG. 5, the left endless rotating chain 56a is wound around a release rotating wheel 56b, a driving sprocket 56c, a tension rotating wheel 56d, and the like. The release rotating wheel 56b is disposed at a position (merging portion) where the left endless rotating chain 56a is closest to the lower right transport device 57 (right endless rotating chain 57a). The driving sprocket 56c is disposed on the left side of the release rotating wheel 56b, and the tension rotating wheel 56d is disposed on the front lower side of the driving sprocket 56c. The drive sprocket 56c is connected to a drive mechanism in a drive case 56e (see FIG. 7), and is driven by power transmitted from the engine. The tension rotating wheel 56d is rotatably supported by a tension bracket 56f (see FIG. 6), and applies a predetermined tension to the left endless rotating chain 56a by the urging force of the urging member 56g (see FIG. 6). To do. The release rotating wheel 56b is rotatably supported by a clogging release mechanism 100 described later.

  As shown in FIG. 5, on the left side of the clogging release mechanism 100, a guide member 90 that guides the culm conveyed by the left endless rotating chain 56 a is supported by a guide support member 91.

  The right endless rotating chain 57a is wound around the right rotating wheel 57b and the like, and is guided endlessly by being guided by the right guide plate 57c.

  Hereinafter, the configuration of the clogging release mechanism 100 will be described with reference to FIGS. 5 to 7. For convenience of explanation, the tension bracket 56f and the urging member 56g are not shown in FIG. 5, and the drive case 56e is not shown in FIGS.

  As shown in FIGS. 5 and 6, the clogging release mechanism 100 supports the release rotating wheel 56 b so as to be rotatable at a predetermined position and, in a predetermined case, from the lower right transport device 57 to the release rotating wheel 56 b. Are separated. The clogging release mechanism 100 mainly includes a release frame 110, a bracket 120, a release lever 130, a fixture 140, a guide rotating wheel 150, a contact plate 160, a drive case bracket 170, and the like.

  The release frame 110 is a main structure of the clogging release mechanism 100. The release frame 110 mainly includes a lower frame 111, an upper frame 112, and the like.

  The lower frame 111 is a substantially rectangular plate material and is supported by the cutting frame 1010 by an appropriate method. The lower frame 111 is arranged with its front end in the longitudinal direction facing left front and its rear end in the longitudinal direction facing rear right. A guide plate 111 a is disposed on the right side surface of the lower frame 111. The guide plate 111a is disposed in substantially the same direction as the grain path of the cereal and guides the left endless rotating chain 56a.

  The upper frame 112 is a member formed by bending a plate material into a substantially L shape. One end of the upper frame 112 is fixed to the rear end of the lower frame 111. As a result, a predetermined gap is formed between the lower frame 111 and the upper surface of the upper frame 112.

The bracket 120 supports the guide rotating wheel 150 so as to be rotatable . The bracket 120 mainly includes a bracket base 121, an upper bracket 122, a lower bracket 123, and the like.

  The bracket base 121 is a member formed by bending a plate material into a substantially U shape. The bracket base 121 is disposed between the lower frame 111 and the upper frame 112, and the vicinity of the front end portion thereof is rotatably supported by the upper frame 112 via a rotation shaft 121a.

  The upper bracket 122 is a member formed by bending a plate material into a substantially U shape (see FIG. 7). The front end portion of the upper bracket 122 is fixed to the rear end portion of the bracket base 121.

  The lower bracket 123 is a plate material and is fixed to the lower surface of the upper bracket 122. As a result, a predetermined gap is formed between the upper surface of the upper bracket 122 and the lower bracket 123. The release rotating wheel 56b is disposed between the upper bracket 122 and the lower bracket 123, and is rotatably supported by the upper bracket 122 and the lower bracket 123 via a rotation shaft 123a.

  The release lever 130 rotates the bracket 120. The release lever 130 is formed of a plate material. One end side of the release lever 130 is rotatably supported by the upper bracket 122 via a rotation shaft 123a of a release rotating wheel 56b provided through the upper bracket 122. The other end side of the release lever 130 is formed in a shape that can be gripped by an operator. In the vicinity of the rotation shaft 123a of the release lever 130, an arcuate guide hole 131 centered on the rotation shaft 123a is formed.

  As shown in FIG. 5 to FIG. 7, the fixture 140 restricts the rotation of the release lever 130 relative to the bracket 120. As shown in FIG. 7, the fixture 140 is a substantially columnar member, and the diameter of the upper end side 141 is formed larger than the diameter of the lower end side 142. In addition, an operation unit 143 is formed at the upper end of the fixture 140 to be gripped when an operator operates. The lower end side 142 of the fixture 140 is inserted into the guide hole 131 of the release lever 130 and is fixed by being screwed into a mounting portion 122 a formed on the upper surface of the upper bracket 122. By screwing the fixture 140, the release lever 130 is pressed by the upper end side 141 of the fixture 140, and the rotation of the release lever 130 is restricted. Further, by loosening the fixing tool 140, the pressing of the release lever 130 by the upper end side 141 of the fixing tool 140 is released, and the release lever 130 can be rotated.

  As shown in FIGS. 5 to 7, the guide rotation wheel 150 is rotatably supported by the release lever 130 via the rotation shaft 151. The rotation shaft 151 is arranged so that its axial direction is parallel to the axial direction of the rotation shaft 123a and at a predetermined distance from the rotation shaft 123a.

  The abutment plate 160 is a member that abuts on the guide rotating wheel 150. The contact plate 160 is formed by bending a substantially rectangular plate material. The bent portion of the contact plate 160 is formed so as to be located slightly rearward from the contact position of the guide rotating wheel 150 when the release lever 130 is in a work position described later. The rear side of the bent portion of the contact plate 160 is inclined away from the release rotating wheel 56b. The contact plate 160 is erected on the upper surface of the upper frame 112.

  The drive case bracket 170 is a member formed by bending a plate material into a substantially L shape, and supports the drive case 56e (see FIG. 7). The drive case bracket 170 is disposed so as to sandwich the contact plate 160 between the upper case 112 and the drive case bracket 170.

  Below, the operation | movement aspect of the clogging cancellation | release mechanism 100 comprised as mentioned above is demonstrated using FIG.5, FIG8 and FIG.9.

  As shown in FIG. 5, when the combine 1 performs a normal cutting operation, the bracket 120 is rotated so that the release rotating wheel 56 b is closest to the lower right transport device 57. Hereinafter, the position where the release rotating wheel 56b is closest to the lower right transport device 57 is referred to as a work position. By screwing the fixture 140 at this working position, the release rotating wheel 56b is held at the working position. In this working position, the contact plate 160 is arranged so that the release rotating wheel 56b and the contact plate 160 are most separated from each other.

  When the release rotating wheel 56b is in the working position, the left endless rotating chain 56a rotates around the release rotating wheel 56b, the driving sprocket 56c, the tension rotating wheel 56d and the like by rotating the driving sprocket 56c. Rotate endlessly. The wheat straw conveyed by the rotating left endless rotating chain 56a is guided by the guide plate 111a and the guide member 90 and conveyed to the merging portion, and merged with the wheat straw conveyed by the right endless rotating chain 57a. It is done.

  When the left endless rotating chain 56a is urged by the tension rotating wheel 56d, tension is applied during transportation, or the cereal is clogged, the releasing rotating wheel 56b has a rotating shaft 121a direction (X direction). A force is applied in the Y direction perpendicular to this direction. However, the force in the X direction is received by the rotating shaft 121a. Further, the bracket 120 tries to rotate leftward (driving sprocket 56c side) about the rotation shaft 121a by the force in the Y direction. However, when the guide rotating wheel 150 contacts the contact plate 160, Power is taken.

  If the cereals that have been transported are clogged at the junction, and maintenance such as removal of the cereals is necessary, the release rotating wheel 56b is separated from the right endless rotating chain 57a. It is possible to easily remove cereal grains and the like. Hereinafter, an operation for separating the release rotating wheel 56b from the right endless rotating chain 57a will be described. The state of the operation in this case is indicated by white arrows in FIG.

  As shown in FIG. 8, the restriction of the rotation of the release lever 130 is released by first loosening the fixture 140. In this state, when the release lever 130 is rotated counterclockwise in the figure, the guide rotation wheel 150 is rotated while being in contact with the contact plate 160 and moved upward along the contact plate 160 in the drawing. Then, it gets over the bent part of the contact plate 160. At this time, since the distance between the center of the rotation shaft 123a and the contact plate 160 is substantially the same, the release lever 130 can be easily rotated without requiring a large force. Further, as the release lever 130 rotates, the rotation shaft 123a moves in a substantially right direction in the figure (a direction away from the right endless rotation chain 57a), and accordingly, the bracket 120 is illustrated with the rotation shaft 121a as the center. It is rotated clockwise. By the rotation of the bracket 120, the release rotating wheel 56b is separated from the right endless turning chain 57a, and the right endless turning chain 57a and the left endless turning chain 56a are separated from each other at the junction.

  As shown in FIG. 9, the fixing lever 140 is screwed in the state where the releasing lever 130 is rotated counterclockwise as much as possible, whereby the rotation of the releasing lever 130 is restricted again, and the right endless rotating chain 57 a The left endless rotating chain 56a can be held in a separated state. Hereinafter, the position of the release rotating wheel 56b when the release lever 130 is fully rotated counterclockwise in the drawing is referred to as a release position.

  As described above, the right endless rotating chain 57a and the left endless rotating chain 56a are separated from each other at the merging portion, so that the merging portion is clogged between the right endless rotating chain 57a and the left endless rotating chain 56a. The cereals and the like can be easily removed, and the workability at the time of cleaning and maintenance of the cutting unit 4 can be improved. Further, since the bracket 120 rotates about the rotation shaft 121a, the bracket 120 can be operated smoothly. Furthermore, when the release lever 130 is operated, the guide rotating wheel 150 rotates while being in contact with the contact plate 160, so that the load for operating the release lever 130 can be reduced.

  In addition, when cleaning and maintenance of the merging portion are completed, the cutting operation can be performed again by moving the release rotating wheel 56b from the release position to the work position and holding it at the work position. Hereinafter, an operation for holding the release rotating wheel 56b in the work position will be described. The state of the operation in this case is indicated by black arrows in FIG.

  As shown in FIG. 8, the restriction of the rotation of the release lever 130 is released by first loosening the fixture 140. In this state, when the release lever 130 is rotated in the clockwise direction in the drawing, the guide rotating wheel 150 is rotated while being in contact with the contact plate 160 and moved downward along the contact plate 160 in the drawing. . Further, the rotation of the release lever 130 causes the rotation shaft 123a to move in a substantially left direction in the figure (a direction close to the right endless rotation chain 57a). Accordingly, the bracket 120 is illustrated with the rotation shaft 121a as the center. It is rotated counterclockwise. By the rotation of the bracket 120, the release rotating wheel 56b comes close to the right endless turning chain 57a, and the right endless turning chain 57a and the left endless turning chain 56a in the joining portion come close to each other.

  With the release lever 130 fully rotated clockwise in FIG. 5, the fixing member 140 is screwed to restrict the rotation of the release lever 130 again, and the right endless rotation chain 57a and the left endless rotation chain are controlled. 56a can be held in the closest state. That is, the release rotating wheel 56b can be held at the work position.

  As described above, the release rotating wheel 56b is most separated from the contact plate 160 at the working position, that is, closest to the right endless rotating chain 57a. Accordingly, when switching between the work position and the release position, the release rotating wheel 56b does not further come close to the right endless rotation chain 57a. The release lever 130 can be operated with an operation load.

  When the release rotating wheel 56b is in the working position, the fixing tool 140 is inserted into one end of the guide hole 131 formed in the release lever 130, and when the release rotating wheel 56b is in the release position, the release lever The positions of both ends of the guide hole 131 are determined so that the fixture 140 is inserted into the other end of the guide hole 131 formed in 130. With this configuration, the working position and the releasing position can be switched by rotating the release lever 130 until the fixing tool 140 comes into contact with either one end of the guide hole 131. That is, it is not necessary for the operator to adjust the position of the release rotating wheel 56b each time an operation is performed, so that workability can be improved.

  As described above, the harvesting unit 4 of the combine 1 according to the present embodiment sandwiches and conveys the root portion of the harvested cereal rice cake, and combines a pair of left and right lower left conveying devices 56 and a lower right conveying unit that merge at the terminal end in the conveying direction. The cutting unit 4 of the combine 1 including the left endless rotating chain 56a, and at least one of the pair of lower left transfer device 56 and right lower transfer device 57 (the lower left transfer device 56) is a left endless The release rotating wheel 56b wound around the end of the rotating chain 56a in the conveying direction, the bracket 120 that rotatably supports the releasing rotating wheel 56b, and the bracket 120 close to the other lower right conveying device 57. Alternatively, a release frame 110 that is rotatably supported via a rotation shaft 121a in a separating direction, and a release lever 130 connected to the rotation shaft 123a of the release rotating wheel 56b, The guide rotating wheel 150 that is rotatably supported by the removal lever 130, the contact plate 160 that is disposed on the side of the release lever 130 and contacts the guide rotating wheel 150, and the release lever 130 cannot be rotated. And a fixture 140 that holds the same. With this configuration, the release lever 130 is rotated, and the bracket 120 is separated from the lower right transport device 57, whereby the release rotation wheel 56b around which the left endless rotation chain 56a is wound is moved to the right. It can be separated from the lower conveying device 57, and the cereals clogged in the junction can be easily removed. Further, since the bracket 120 rotates about the rotation shaft 121a, the bracket 120 can be operated smoothly. Furthermore, when the release lever 130 is operated, the guide rotating wheel 150 rotates while being in contact with the contact plate 160, so that the load for operating the release lever 130 can be reduced.

  In addition, the bracket 120 supports the rotation shaft 123a of the release rotating wheel 56b by the upper bracket 122 and the lower bracket 123 that sandwich the release rotating wheel 56b. With this configuration, the rotation shaft 123a of the release rotating wheel 56b is supported by the upper bracket 122 and the lower bracket 123 that sandwich the release rotating wheel 56b, and the rattling of the release rotating wheel 56b is prevented. be able to. In the present embodiment, the upper bracket 122 and the lower bracket 123 are configured as separate members, but the present invention is not limited to this, and the upper bracket 122 and the lower bracket 123 are bent by a single plate. It is also possible to form the structure.

DESCRIPTION OF SYMBOLS 1 Combine 4 Cutting part 56 Lower left conveyance apparatus 56a Left endless rotation chain 56b Release rotary wheel 57 Right lower conveyance apparatus 110 Release frame 120 Bracket 123a Rotation shaft 130 Release lever 140 Fixing tool 150 Guide rotation wheel 160 Contact plate

Claims (2)

A pair of left and right lower transfer devices (56, 57) that sandwich and convey the stock base portion of the harvested cereal meal and merge at the end of the transfer direction are provided, and at least one of the pair of lower transfer devices (56, 57) Is a harvesting part (4) of a combine (1) comprising an endless rotating chain (56a),
A release rotating wheel (56b) wound around the end of the endless rotating chain (56a) in the conveying direction, and a bracket (120 ) rotatably supporting the releasing rotating wheel (56b) by a rotating shaft (123a). And a release frame (110) for supporting the bracket (120) so as to be rotatable via another rotating shaft (121a) in a direction approaching or separating from the other lower transport device (57). Rotating by a release lever (130) pivotally connected by using the rotation shaft (123a) of the release rotating wheel (56b) and a rotation shaft (151) provided on the release lever (130) A guide rotation wheel (150) that is pivotally supported, a contact plate (160) that is disposed on the side of the release lever (130) and that contacts the guide rotation wheel (150), and the release lever the (130) bracket ( Against 20), comprising a fixture and (140) for holding so as to not rotate,
The contact plate (160) with which the guide rotating wheel (150) contacts forms a bent portion in the middle of the contact portion, and the rear side of the bent portion is separated from the release rotating wheel (56b). Combine harvester characterized by being inclined in the direction .   The bracket (120) supports a rotating shaft (123a) of the release rotating wheel (56b) by plate-like members (122, 123) sandwiching the release rotating wheel (56b). The combine harvester according to Item 1.

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