JP2014087314A - Threshing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a threshing device in which a threshing cylinder in a threshing chamber is constituted with a front thresher and a rear thresher which continues to the front thresher and rotates with a higher speed than the front thresher, and threshing objects are smoothly transported to the rear side in the boundary between the front thresher and the rear thresher.SOLUTION: In the threshing device, a threshing cylinder 14 in a threshing chamber 13 is constituted with a front thresher 14a and a rear thresher 14b which continues to the front thresher 14a and rotates with a higher speed than the front thresher 14a, a dust feeding guide 17 is provided to a ceiling of the threshing chamber 13 for guiding transport of threshing objects. The dust feeding guide 17 is continuously held in a promoting state where the dust feeding guide is tilted rear-downward toward the lower side of the rotation direction, and is arranged across the boundary of the front thresher 14a and the rear thresher 14b, so that the dust feeding guide functions as a boundary side guide 27.

Description

  The present invention relates to a threshing apparatus that divides a handling cylinder into a plurality of front and rear parts and rotates them at different speeds.

  A dust feed guide is provided on the ceiling side of the handling chamber on which the handling cylinder is pivoted to guide the rearward transfer of threshing, and the opening of the dust feeding guide is changed so as to change the amount of threshing carried before and after the handling chamber. The threshing apparatus of patent document 1 which adjusted this is conventionally well-known.

  By the way, the handling cylinder in the handling chamber is constituted by a front handling part and a rear handling part that is continuously connected to the front handling part and rotates at a higher speed than the front handling part, and the threshing state is made different between front and rear, thereby threshing work. Although a threshing device with improved efficiency is also known in the past, it is preferable that such a threshing device also guides the threshing backward, and as such, the receiving along the lower peripheral surface of the handling cylinder. A threshing device shown in Patent Document 2 in which a dust feeding guide for guiding threshing backward on the net side is also known.

JP 2004-267080 A Japanese Patent No. 3212499

  In the threshing apparatus shown in the above-mentioned document 2, turbulence is likely to occur due to the difference in rotational speed between the front handling part and the rear handling part, and threshing tends to accumulate on the receiving net side. The dust feed guide exhibits a good rear guide function only when threshing is smoothly fed in the rotation direction by the handling cylinder. The guide does not exhibit a sufficient rear guide function, and the threshing that stays there may be excessively threshed and damaged by the handling cylinder, and the threshing process is repeated as described above, resulting in a deterioration in fuel consumption. Furthermore, in order to arrange the dust feed guide on the receiving net side, it is necessary to form the tooth handling shorter, so that it is more difficult for the cereal to flow in the rotation direction.

  In the present invention, in the threshing apparatus in which the handling cylinder in the handling chamber is constituted by a front handling part and a rear handling part that is continuous with the front handling part and rotates at a higher speed than the front handling part, the front handling part and the rear handling part It is an object of the present invention to provide a threshing device that guides threshing so that the threshing is smoothly conveyed rearward at the boundary.

  In order to solve the above problems, the present invention firstly handles the handling cylinder 14 in the handling chamber 13 after handling the front handling part 14a and the front handling part 14a, which rotates at a higher speed than the front handling part 14a. In the threshing apparatus that is configured by the portion 14b and provided with a dust feeding guide 17 that guides conveyance of threshing on the ceiling side of the handling chamber 13, an accelerated state in which the handling cylinder 14 is inclined backward toward the lower side in the rotational direction. The dust feed guide 17 that is always held in step 1 is provided so as to straddle the boundary between the front handling portion 14a and the rear handling portion 14b.

  Second, a dust feed guide 26 parallel to or substantially parallel to the boundary guide 27 is provided in front of the boundary guide 27.

  Thirdly, the boundary guide 27 and the dust supply guide 26 inclined in the accelerated state in front of the boundary guide 27 are fixedly provided, and the dust supply disposed behind the boundary guide 27 is provided. The guide 28 is characterized in that the inclination can be adjusted at least to the non-promoted state.

  Fourth, the dust feeding guide 28 disposed behind the boundary side guide 27 is provided with an elastic member 56 that elastically biases to a reference posture that is a posture in a no-load state.

  The front handling part and the rear handling part that rotates at a higher speed than the front handling part constitute a handling cylinder in the handling chamber, and it is configured to straddle the boundary between the front handling part and the rear handling part and always be in an accelerated state. By providing the boundary side guide on the ceiling side of the handling chamber, it is possible to guide the threshing smoothly backward without accumulating on the receiving net even at the boundary where the threshing is easily clogged due to a change in the rotation speed of the handling cylinder. At the same time, it is not necessary to shorten the tooth handling at the boundary between the handling cylinders, and the threshing can be efficiently caused to flow in the rotation direction of the handling cylinder.

  According to what provided the dust feeding guide parallel or substantially parallel to this boundary side guide ahead of the said boundary side guide, the threshing threshed by the front handling part can be conveyed back more smoothly.

  The boundary-side guide and the dust-feeding guide tilted forward in the accelerated state with respect to the boundary-side guide are fixedly provided, and the dust-feeding guide disposed behind the boundary-side guide is at least in the non-promoted state. According to what was provided so that inclination adjustment was possible, while being able to suppress the damage of threshing, the branch raft process with respect to threshing can be accelerated | stimulated and threshing performance can also be improved.

  According to the dust supply guide disposed behind the boundary side guide and provided with an elastic member that is elastically biased to the reference posture which is a no-load state posture, the inclination of the dust supply guide is conveyed. Since it is automatically adjusted according to the load received from threshing, the threshing process can be performed smoothly regardless of the transport amount.

It is a side view which shows the threshing apparatus to which this invention is applied. It is a front view which shows the threshing apparatus to which this invention is applied. It is a principal part front view of a treatment room. It is a principal part top view which shows a threshing part. It is an expanded view of the threshing part which expand | deployed the receiving net and the handling cylinder. It is a top view of a dust feeding unit. It is a principal part side view of a dust feeding unit. (A) It is principal part sectional drawing of a dust feeding unit, (B) It is the figure which showed the cross-sectional shape of a cylindrical part and a rotating shaft, (C) is a cross-sectional shape of a cylindrical part and a rotating shaft. It is the figure which showed the other example.

Hereinafter, embodiments of the present invention will be described based on illustrated examples.
FIG.1 and FIG.2 is the side view and front view which show the threshing apparatus to which this invention is applied, FIG. 3 is the principal part front view of a handling room, FIG. 4 is the principal part top view which shows a threshing part. FIG. 5 is a development view of the threshing unit in which the receiving net and the handling cylinder are developed.

  The threshing apparatus of the present embodiment is a threshing apparatus 1 mounted on a harvesting machine (not shown) such as a combine, and the threshing apparatus 1 was cut from the field by a pre-processing unit (not shown) on the harvesting machine side. A threshing unit 2 for threshing the cereal, a selection unit 3 for selecting the thresh threshed by the threshing unit 2, and a head side of the cereal by grasping the stock source side of the cereal harvested by the pretreatment unit Are provided on the rear side of the threshing unit 2 and the sorting unit 3 and a discharge unit 6 that discharges swarf and the like after sorting.

  The said conveyance part 4 is provided with the feed chain 7 to which the cereals conveyed from the pre-processing part side are passed, and the waste conveyance body 8 arrange | positioned at the back of this feed chain 7. FIG. The feed chain 7 holds the stock source side of the received cereal so that the tip side is inserted into the threshing portion 2, and conveys it backward along the threshing portion 2. The cereals conveyed rearward are handled (threshing-processed) in this process and discharged. The cereals that have been rejected are conveyed to the discharge unit 6 at the rear end of the threshing device by the rejection transport body 8.

  More specifically, the culm conveyed to the threshing apparatus 1 side is between the feed chain 7 and the clamping rail 9 disposed near the upper side of the feed chain 7. The sandwiching rail 9 is covered and supported on the side of the threshing cover 12 that covers the upper surface side of the threshing device 1. . (See FIGS. 2 and 3).

  In the threshing unit 2, a handling cylinder 14 formed in a cylindrical shape over the entire front-rear direction is rotatably supported in a handling chamber 13 in which the tip of the cereal is conveyed by the conveying unit 4. A processing cylinder 16 is rotatably supported on the right side of the cylinder 14, and a plurality of dust feeding guides are arranged on the ceiling side (above the cylinder 14) in the front and rear along the cylinder 14. 17 is arranged.

  The handling cylinder 14 includes a front handling unit 14a that rotates at a low speed and a rear handling unit 14b that is provided continuously behind the front handling unit 14a and rotates at a high speed in the same rotational direction as the front handling unit 14a. The front handling portion 14a and the rear handling portion 14b are both pivotally supported so as to be rotationally driven around the same handling cylinder rotation shaft 18. The front handling unit 14a and the rear handling unit 14b are configured by dividing the entire handling cylinder 14 at a ratio of about 1: 2, and are handled before and after the boundary between the front handling unit 14a and the rear handling unit 14b. The rotational speed of the cylinder 14 can be changed.

  Specifically, in the front handling unit 14a, the number of rotations is suppressed more than that in the rear handling unit 14b, so that the grain is mainly shattered from the head part of the cereal while suppressing the occurrence of cuttings and shavings, and the post-handling. In the part 14b, by rotating at a higher speed than the front handling part 14a, a good single graining process of the threshed grain and a threshing process of the untreated grain remaining without being threshed in the head part are performed. Configured to do. Therefore, since the handling cylinder 14 can be driven more efficiently in the front-rear direction, fuel efficiency is also improved.

  Further, on the outer peripheral surfaces of the front handling portion 14a and the rear handling portion 14b, a handling portion 21a formed by bending a rod-like member into a mountain shape, and a chevron slightly smaller than the handling portion 21a provided inside the handling portion 21a. A large number of teeth 21 composed of the handle 21b (see FIG. 3) are provided, and a receiving net 22 is arranged along the outer periphery of the teeth 21. The receiving net 22 includes an arcuate receiving net 22a disposed directly below the handling cylinder 14, and an arcuate side disposed along the right side of the handling cylinder 14 from the right end side of the receiving net 22a. A receiving net 22b and an upper receiving net 22c covering from the upper end side of the side receiving net 22b to the vicinity of the right end of the dust feed guide 17 are configured (see FIGS. 2, 3 and 5). In addition, on the rear end side of the rear handling portion 14b, the tooth handling teeth 21 are densely arranged to prevent unhandled items.

  The dust feed guide 17 is disposed on the upper side (the ceiling surface side of the handling chamber 13) of the handling cylinder 14, and includes a fixed guide 26 provided on the upper side of the front handling part 14a, and a front handling part. The boundary guide 27 provided so that the boundary of 14a and the rear handling part 14b may be straddled, and the dust feeding unit 28 provided in the upper side of the rear handling part 14b are provided (refer FIG. 4). Each dust feed guide 17 guides the rearward transfer of threshing in the handling chamber 13 to be accelerated or stagnated. The detailed configuration of each dust guide 17 will be described later.

  The sorting unit 3 includes a swinging sorter 31 supported so as to be able to swing back and forth on the lower side of the receiving net 22, and a sorting wind that is provided below the front part of the swinging sorter 31 and that is obliquely rearward and upward. Arranged and sorted between the tang fan 32, the second sorter fan 33 that is arranged behind the tang fan 32, and similarly produces the sorter wind, and the tang fan 32 and the second sorter fan 33. The first spiral 34 for transporting the first object and the second spiral 36 for transporting the second object selected and disposed behind the second sorting fan 33 are provided.

  With the above-described configuration, the harvested cereal rice cake that has been transferred from the pre-processing unit side and has the stock side sandwiched between the feed chain 7 and the sandwiching rail 9 is inserted into the handling chamber 13 in the state where the tip side is inserted into the handling chamber 13. 7, the cereals are handled and threshed by the handling cylinder 14 that is driven to rotate in the forward rotation direction (clockwise in FIGS. 2 and 3). Specifically, the threshing process is performed by rubbing the tip side of the cereal husk and the threshing target on the receiving net 22 side by the tooth handling 21 of the front handling unit 14a and the rear handling unit 14b.

  The processed product (threshing) subjected to the threshing treatment is guided by the dust feeding guide 17 and spirally moved to the rear side along the outer periphery of the handling cylinder 14, and the receiving net disposed on the lower side of the handling cylinder 14. 22, and leaks from the receiving network 22 and the like to the sorting unit 3 side.

  The processed product that has been threshed by the threshing unit 2 and dropped from the receiving net 22 is oscillated and sorted by the oscillating sorter 31 of the sorting unit 3 and sorted into the first or second item by the sorting wind ( Wind selected). Specifically, the first thing that falls on the first spiral 34 without being affected by the sorting wind by the tang fan 32 and the effects of the sorting wind of the tang fan 32 and the second sorting fan 33 are slightly affected. The second product falling on the second spiral 36 on the side and the waste such as sawdust blown upward and obliquely under the influence of the sorting fans 32, 33 and 35 are sorted.

  The selected first thing is conveyed into the Glen tank 38 via the first spiral 34 and the grain carrier 37 (see FIG. 2), and the second thing is the second helix 36 and the reducing carrier (not shown). ) Through the processing cylinder 16 of the threshing unit 2, the handling cylinder 14, or the oscillating sorter side 31 of the sorting unit 3, and the discharged material is discharged from the rear end side of the sorting unit 3 through the discharge unit 6. It is discharged outside.

  Further, the cereals that have been threshed and rejected are passed from the rear end side of the feed chain 7 to the waste transporting body 8 to the post-processing unit 39 provided in the discharge unit 6 on the rear end side of the threshing device 1. Be transported. The cereals such as slag transported to the post-processing unit 39 are cut as they are or with the cutter 41 of the post-processing unit 39 and discharged outside the apparatus. Incidentally, the processed product cut by the post-processing unit 39 is configured to be discharged to the field by the diffusion spiral 42 evenly.

Next, the dust feeding guide will be described with reference to FIGS.
The boundary guide 27 arranged so as to straddle the boundary between the front handling portion 14a and the rear handling portion 14b, and the fixed guide 26 (one in the illustrated example) arranged on the front side of the boundary guide 27, A plate-like member extending in the left-right direction of the chamber 13 and having a cross-section bent in an L shape along the longitudinal direction, and a mounting surface 26a attached to the ceiling surface side of the chamber 13; 27a and guide surfaces 26b and 27b extending vertically downward from the ceiling side of the handling chamber 13 are formed.

  Further, the boundary guide 27 and the fixed guide 26 are inclined in the backward direction toward the rotation direction (forward rotation direction) of the handling cylinder 14 to promote the backward conveyance of threshing (hereinafter, in an accelerated state). The attachment surfaces 26 a and 27 a are fixed to the ceiling surface side of the handling chamber 13. In other words, the boundary guide 27 and the fixed guide 26 are fixed in a state where the right end side is tilted so that the right end side is positioned forward of the left end side, that is, in a state where the opening degree is increased (open). Thereby, the threshing which has come to the upper side of the handling cylinder 14 by the forward rotation of the handling cylinder 14 collides with the rear side of the guide surfaces 26b, 27b, and is guided in the direction in which the shed grains are conveyed backward. At this time, the boundary guide 27 and the fixed guide 26 are fixed in substantially the same inclination in plan view (see FIG. 4).

  Further, on the front end side of the handling chamber 13, a front end fixing guide 46 is provided which is substantially the same as the fixing guide 26 and is slightly shorter. The front end fixing guide 46 is a receiving net on which threshing work is started. 22 straddles the boundary of the front end, and is arranged with substantially the same inclination as the boundary guide 27 and the fixed guide 26 (see FIGS. 4 and 5). In other words, the right end (front end) side of the front end fixing guide 46 is disposed forward of the front end of the receiving net 22, and the left end (rear end) side of the front end fixing guide 46 is disposed on the plan view receiving net 22. Tilt to the state is fixed.

  The dust feeding unit 28 disposed on the rear side of the boundary guide 27 is a plurality of dust feeding guides (two in the illustrated example) provided on the rear side of the boundary guide 27, and a guide member 47 that guides grain removal. The inclination (opening degree) of the lens is configured to be adjustable with respect to the rotation shaft 48. Specifically, the guide member 47 of the dust feeding unit 28 is slanted forward from the promoted state toward the lower side in the rotational direction of the handling cylinder 14 (rear handling unit 14b), thereby stagnating the cereal removal conveyance. An arbitrary inclination can be set up to the range of the state (hereinafter, non-promoted state).

  In addition, the dust feeding unit 28 is configured to automatically adjust the opening degree from the set initial position to the promotion side in accordance with the amount of cereal removal, that is, the load applied to the guide member 47. Detailed configuration will be described later.

  Further, a rear end fixing guide 49 is provided on the rear end side of the handling cylinder 14 on the rear side of the dust feeding unit 28 and fixed in a substantially vertical state with respect to the handling cylinder rotating shaft 18 (the front-rear direction of the handling cylinder 14). Yes. A pair of stagnation guides formed in front of the rear end fixing guide 49 shorter than the rear end fixing guide 49 and tilted so as to be in the non-promoting state and fixed to the ceiling surface side of the handling chamber 13. 51, 51 are provided.

  According to the dust feed guide 17 having the above-described configuration, the front end fixing guide is provided to be fixed at substantially the same opening from the front end side of the front handling portion 14a (receiving net 22) to the boundary with the rear handling portion 14b. By the 46, the fixed guide 26, and the boundary guide 27, the threshing threshed on the front handling portion 14a side can be smoothly conveyed rearward. In particular, the boundary guide 27 straddling the boundary between the front handling part 14a and the rear handling part 14b allows the cereal to be smoothly conveyed rearward even at the boundary between the front handling part 14a and the rear handling part 14b, which are relatively easily clogged with shed grains. Therefore, it is possible to efficiently prevent the threshing from being clogged at the boundary where the rotational speed of the handling cylinder 14 is different, thereby damaging the cereal and applying a load to the rotation of the handling cylinder 14.

  In other words, the threshing that has been threshed (threshing treatment) in the front handling portion 14a is quickly transported to the rear handling cylinder 14b side by the fixed guide 26 fixed on the promotion side and the boundary guide 27, so that a large amount Is prevented from staying on the front handling portion 14a side, and grain breakage is performed on the rear handling cylinder 14b side, whereby grain damage can be efficiently suppressed.

  Incidentally, two or more (plural) of the fixed guides 26 may be arranged above the front handling portion 14a.

  Further, the rear end side of the rear handling portion 14 is delayed by the rear end fixing guide 49 and the stagnation guides 51 and 51, and the rear conveyance of the threshing is delayed, and the rear end of the rear handling portion 14b is handled by the tooth handling teeth 22 arranged densely. By performing the unloading operation, clogging of cereals in the middle of the handling chamber 13 can be prevented, and untreated residue can be eliminated as much as possible. In addition, since the threshing processed until it is transferred to the rear side of the rear handling cylinder 14b gradually leaks from the receiving net, the rear end fixing guide 49 and the stagnation guides 51, 51 are tilted to the non-promoting side. Even if it is, it is possible to promote branching without saturating.

  Next, the structure of the dust feeding unit will be described with reference to FIGS. 6 is a plan view of the dust feeding unit, FIG. 7 is a side view of the main part of the dust feeding unit, FIG. 8A is a sectional view of the main part of the dust feeding unit, and FIG. ) Is a diagram showing an example of the cross-sectional shape of the cylindrical portion and the rotation shaft, and (C) is a diagram showing another example of the cross-sectional shape of the cylindrical portion and the rotation shaft. The dust supply unit 28 includes a guide member 47 that rotates about a rotation shaft 48, and a biasing member that biases the guide member 47 to an initial position. Elastic member) 56, a regulation mechanism 57 provided for each guide member 47 so as to regulate the rotation of the guide member 47, and an initial position setting tool provided for each guide member 47 for setting the initial position. 58 and a single support frame 59 on which these members are supported.

  The support frame 59 is composed of a lower frame 59a on the ceiling surface side of the handling chamber 13 and an upper frame 59b in which the front and rear ends of a plate long in the front-rear direction are bent downward, respectively, and is formed in a box shape as a whole. Is formed. The lower frame 59a is formed with a shaft hole 59c through which the rotating shaft 48 is inserted. The upper frame 59b is formed in an arc shape around the rotating shaft 48 in plan view. A restriction hole 61 on the restriction mechanism 57 side and a setting hole 62 on the initial position setting tool 58 side, which are a pair of front and rear arc-shaped holes, are formed (see FIG. 6).

  The guide member 47 is a surface parallel to the lower frame 59a and attached to the lower end side of the rotating shaft 48, and a surface extending in a direction intersecting (vertically) the lower frame 59a. Therefore, the guide surface 47b that collides with the threshing conveyed in the handling chamber 13 and is guided is formed in an L-shaped cross section.

  The rotating shaft 48 has a lower-side attached portion 48a exposed in the handling chamber 13, and a midway portion and an upper side having a diameter smaller than that of the attached portion 48a and a symmetrical cross-sectional shape. A formed working part 48b (see FIGS. 8B and 8C) and a mounting hole 48c in which a screw hole is recessed on the upper end side are formed. The rotating shaft 48 is actuated according to the cross-sectional shape of the bearing 63 (bearing) fixed to the upper surface side of the lower frame 59a and the location where the shaft hole 59c is disposed, and the actuated portion 48b. The cylindrical part 64 which is a boss member provided with the fitting hole 64a formed so that the part 48b can be fitted is provided, and the action arm 66 attached to the outer peripheral side of the cylindrical part 64 is provided.

  More specifically, the operated portion 48b of the rotating shaft 48 is inserted into the shaft hole 59c and the bearing 64 from the lower side of the lower frame 59a. At this time, the rotating shaft 48 is connected to the shaft hole of the bearing 64. The upper end side of the attached portion 48 a having a larger diameter is inserted to a position where it comes into contact with the lower end side of the bearing 64.

  In this state, by fitting and inserting the fitting hole 64a of the cylindrical portion 64 into the operated portion 48b of the rotary shaft 48 disposed in the support frame 59, the cylindrical portion 64 is rotated. It is attached to the 48 side so as to be integrally rotatable. Further, the cylindrical portion 64 attached to the actuated portion 48b side is covered with the action arm 66 that is an action member that causes the elastic force of the torsion spring 56 to act on the rotating shaft 48 side. 66 is configured to rotate integrally with the rotation shaft 48.

  At this time, the cylindrical portion 64 is formed with a thick wall at the lower end side of the cylindrical portion 64 that comes into contact with the bearing 63, so that a space is provided between the working arm 66 and the bearing 63 that are sheathed on the cylindrical portion 64. It is formed so that the rotation of the action arm 66 does not interfere with the bearing 63 and its mounting plate 65.

  The torsion spring 56 is an elastic member in which a coil portion 56a wound in a spiral form a main body, and an elastic force acts around the axis of the coil portion 56a, and the winding start side and the winding end side of the coil portion 56a. Are integrally formed with arms protruding outward in the radial direction of the coil portion 56a. Incidentally, one of the pair of arms formed on the torsion spring 56 is a restriction side arm 56b engaged with the restriction mechanism 57 side, and the other side is an operation attached to the initial position setting tool side 58. This is the side arm 56c.

  The torsion spring 56 is inserted through the inner peripheral side of the coil portion 56a into the outer peripheral side of the cylindrical portion 64 without a substantial gap, and in this state, a bolt is inserted into the mounting hole 48c on the upper end side of the rotating shaft 48 via a washer 67. By tightening and fixing 68, it is supported on the rotating shaft 48 side.

  The restriction mechanism 57 includes a restriction pin 71 that is attached and fixed to the extending side end of the action arm 66, and a restriction hole 61 that is formed on the upper surface side of the upper frame 59b and through which the restriction pin 71 is inserted. Yes. Specifically, the restriction pin 71 protrudes upward from the action arm 66 in parallel with the rotation shaft 48, and the upper end portion of the restriction pin 71 faces the upper surface side of the upper frame 59 b through the restriction hole 61. It is out.

  According to this configuration, when the guide member 47 in the handling chamber 13 is integrally rotated around the axis of the rotation shaft 48, the restriction pin 71 moves through the restriction hole 61 through the cylindrical portion 64 and the action arm 66. Moving. That is, the rotation range of the guide member 47 is limited to a range in which the restriction pin 71 moves in the restriction hole 61.

  Note that the restriction side arm 56 b of the torsion spring 56 is engaged with the restriction pin 71. Specifically, the regulation side arm 56b is hooked on the regulation pin 71 by forming the end side in a hook shape.

  The initial position setting tool 58 includes a columnar shaft 72 parallel to the rotation shaft 48 and an operation tool main body 73 attached to the upper end portion of the shaft 72. The shaft 72 has an insertion portion 72a formed so as to be able to be inserted into the setting hole 62 formed in the upper frame 59b through the washer 70 by reducing the diameter on the upper end side, and a shaft 72 in the middle portion. A mounting hole 72b is formed which is drilled in a direction perpendicular to the axial direction and through which the operation side arm 56b of the torsion spring 56 is inserted. In addition, the operation tool main body 73 is formed in a dial shape and has a screw hole 73a formed in the lower surface side so as to be fastened and fixed to the shaft insertion portion 72a.

  That is, the shaft 72 is supported by inserting the operation side arm 56c protruding from the torsion spring 56 through the mounting hole 72b. The insertion portion 72a of the shaft 72 faces the upper surface side of the upper frame 59b through the setting hole 62. In this state, the operating tool main body 73 and the shaft 72 are clamped and fixed with the upper frame 59b interposed therebetween. Thus, the rotational position of the operation side arm 56c of the torsion spring 56 can be fixed at an arbitrary position.

  With the above-described configuration, the dust feeding unit 28 adjusts the position of the operation tool main body 73 along the setting hole 62, so that the shaft 72 → the operation side arm 56 c → the restriction side arm 56 b → the restriction pin 71 → the action arm 66. The guide member 47 can be rotated by applying a force in the order of the cylindrical portion 64 → the rotation shaft 48 → the guide member 47. For this reason, the initial position setting tool 58 can arbitrarily set the initial position (initial opening degree) of the guide member 47 of the movable dust feeding unit 28.

  In addition, the guide member 47 of the dust feeding unit 28 set at the initial position resists the elastic force of the torsion spring 56 when a load is applied due to collision of the cereal grains transported through the handling chamber 13 with the guide surface 47b. Thus, the guide member 47 can be automatically rotated from the initial position in the opening direction around the rotation shaft 48. This automatic rotation of the guide member 47 is allowed within a range where the restriction pin 71 that swings through the rotation shaft 48 contacts the end side of the restriction hole 61.

Next, points different from the above-described points will be described in another embodiment of the present invention.
The dust feed guides 46, 26, 27 attached in a state fixed to the upper side of the front handling portion 14 a are changed to the dust feed unit 28 whose opening degree can be adjusted, and the urging force of the torsion spring 56 is changed. Accordingly, the range in which the opening degree of the guide member 47 is adjusted may be configured to be always in the accelerated state side. In this case, when the initial position of the guide member 47 using the initial position setting tool 58 is set, a restricting portion (not shown) that restricts the guide member 47 from rotating to the non-promoted state side is provided. Thereby, the guide member 47 is always set to the accelerated state side.

  In addition to the above-described configuration, a plurality of dust feeding guides 17 that are attached to the upper side of the front handling portion 14a with substantially the same inclination, specifically, a front end fixing guide 46, a fixing guide 26, An operation lever (not shown) capable of adjusting the opening degree (angle) at a time within a range in which the inclination of the boundary guide 27 is in an accelerated state may be provided.

  According to this configuration, by operating a single operating lever, the plurality of dust feeding guides 17 disposed so as to be substantially parallel to each other above the front handling portion 14a are maintained in a mutually parallel state. The opening can be adjusted at a time and fixed at the adjusted opening.

13 Handling chamber 14 Handling cylinder 14a Front handling part 14b Rear handling part 17 Dust feed guide 27 Boundary side guide 56 Torsion spring (elastic member)

Claims (4)

  A handling cylinder (14) in the handling chamber (13) includes a front handling part (14a) and a rear handling part (14b) that rotates continuously at a higher speed than the front handling part (14a). And a threshing apparatus provided with a dust feeding guide (17) for guiding the threshing conveyance on the ceiling side of the handling chamber (13), and inclined rearward toward the lower rotation direction of the handling cylinder (14). By providing the dust feed guide (17) that is always held in the promoted state so as to straddle the boundary between the front handle (14a) and the rear handle (14b), the dust feed guide (17) is bounded. Threshing device as a side guide (27).   The threshing device according to claim 1, wherein a dust feeding guide (26) parallel to or substantially parallel to the boundary side guide (27) is provided in front of the boundary side guide (27).   The boundary side guide (27) and the dust feed guide (26) inclined in the accelerated state in front of the boundary side guide (27) are fixed and provided at the rear of the boundary side guide (27). The threshing apparatus according to any one of claims 1 and 2, wherein the arranged dust feeding guide (28) is provided so that the inclination can be adjusted at least to a non-promoted state.   Any of the Claims 1 thru | or 3 which provided the elastic member (56) elastically urged | biased to the reference | standard attitude | position which is an attitude | position in a no-load state in the dust feeding guide (28) arrange | positioned back rather than the said boundary side guide (27). A threshing device according to any one of the above.

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